To see the other types of publications on this topic, follow the link: % saturation of transferring.
Journal articles on the topic '% saturation of transferring'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic '% saturation of transferring.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Hemangini, Chaudhari, Dixit R., and Jadeja J.M. "Serum Level Of Iron And Transferrin In Normal And Anemic Pregnant Women." International Journal of Basic and Applied Physiology 2, no. 1 (2013): 123–26. https://doi.org/10.5281/zenodo.4483106.
Full textAbstract:
Iron deficiency anemia is a major health problem in our country especially in pregnancy. For accurate diagnosis of iron deficiency anemia we require accurate indicators based on which treatment can be given. Purpose of this study is to prevent unnecessary iron overload by accurate diagnosis in pregnancy as excessive iron can lead to oxidative damage. Method: Serum level of Iron and transferrin and total iron binding capacity and % saturation of transferrin were estimated in 70 women in their I, II and III trimester of pregnancy. Only healthy subjects (without infective, metabolic, and degenerative disease) on clinical examination were selected. The women were divided into three groups according to their hemoglobin level in normal, mild anemic and moderate to severe anemia. Result: In normal group serum iron levels were within normal range in all trimester, whereas in anemic groups serum iron level were lower. Serum transferrin level was raised in III trimester in all the groups and also raised in I and II trimester in severe anemic group. TIBC was increased with decreased in serum iron level. % saturation of transferrin was lowered with lowered hemoglobin level. Conclusion: Our study shows iron level can be well correlated with haemoglobin level but transferrin level cannot be well correlated. But % of transferrin saturation can be a better indicator then transferrin.
2
Naureen, Tallat, Umbreen Ahmed, Bushra Riaz, Ujala Ali, Javaria Sharafat, and Ehsan Shabbir. "ASSOCIATION BETWEEN IRON STATUS AND GESTATIONAL DIABETES MELLITUS." Pakistan Journal of Physiology 18, no. 2 (2022): 47–50. http://dx.doi.org/10.69656/pjp.v18i2.1453.
Full textAbstract:
Background: Early identification of risk factors for gestational diabetes may result in its prevention and better management. In this study, we aimed to compare serum iron, total iron binding capacity and transferring saturation in pregnant women with and without gestational diabetes. Methods: A comparative cross sectional analytical study was conducted at Army Medical College and Centre for Research in Experimental and Analytical Medicine (CREAM) in association with Pak Emirates Military Hospital. Thirty healthy pregnant women and thirty patients of gestational diabetes mellitus matched for age, gestational age and body mass index (BMI) were recruited for the study. The diagnosis of gestational diabetes was made on the basis of abnormal glucose tolerance test at twenty four weeks of gestation. Serum iron and total iron binding capacity of all subjects were measured using colorimetric assay and transferrin saturation was calculated. Analysis of data was carried using SPSS-22. Mean values were calculated for all variables and compared by two sample t-test. Pearson correlation was determined to find association between different quantitative variables in two groups and p?0.05 was considered significant. Results: Serum iron was significantly higher (p=0.007), TIBC significantly lower (p=0.004) and transferrin saturation significantly higher (p<0.001) in gestational diabetes group as compared to control group. Conclusion: Markers of iron status including serum iron and transferrin saturation were higher in patients of gestational diabetes and may pose a risk of developing gestational diabetes mellitus. Pak J Physiol 2022;18(2):47–50
3
Kim, Yaewon, Chia-Hsiu Chen, and Christian Hilty. "Direct observation of Ru-alkylidene forming into ethylene in ring-closing metathesis from hyperpolarized 1H NMR." Chemical Communications 54, no. 34 (2018): 4333–36. http://dx.doi.org/10.1039/c7cc08135a.
Full text
4
Saha, Ananya, Pradip Mukhopadhyay, Indrajit Nath, Arun Kumar, and Utpal Kumar Biswas. "A quantitative assessment of body iron status and its relationship with glycemic control in patients of type 2 diabetes mellitus in a tertiary care hospital of Kolkata." Asian Journal of Medical Sciences 12, no. 5 (2021): 69–74. http://dx.doi.org/10.3126/ajms.v12i5.33344.
Full textAbstract:
Background: Diabetes is one of the most common disease which is observed in every household of Indian population. The longevity of the diabetic patients is dependent upon the frequency of complication and comorbidity that they encounter. Serum iron and ferritin, both being the aggravators to the oxidative stress accelerating the development of complications, gives us the reason to venture into the territory exploring the possibility of monitoring the body iron stores and taking prevent measures to control such complication. The current study was designed with an aim to knot the relationship between body iron stores and glycemic control in patients of type-II diabetes mellitus.
 Aims and Objectives: To measure the levels of serum ferritin, serum Iron, transferrin saturation and HbA1C and finding out the relationship between body iron stores and glycemic control in patients of Type-II Diabetes Mellitus.
 Materials and Methods: A total of 50 diagnosed cases of type II DM and 50 healthy controls between the age group of 35-65 years were taken following inclusion and exclusion criteria. Body iron stores were assessed by measuring serum ferritin, Serum iron and Transferrin saturation and Glycemic control was assessed by measuring levels of HbA1C.
 Results: A significant increase in serum ferritin, serum iron and Transferrin saturation (P<0.001) was noted in diabetic patients as compared to controls. There was a positive correlation between serum iron and transferring saturation in the diabetic patients.
 Conclusion: The co-morbidities and complications in the Diabetic population can be prevented by monitoring Body iron stores as they can significantly contribute to the oxidative stress leading to the complication and decreased life expectancy. Early detection in the abnormality in the body iron store can help us in employing proper measures for a better management of Type-II diabetic patients and thereby improving their survival.
5
Thapa, Saroj, Madhab Lamsal, Sanjay Kumar Sah, et al. "Impact of Iron Status on Thyroid Function: A Community Based Cross-Sectional Study in Eastern Nepal." Journal of College of Medical Sciences-Nepal 15, no. 1 (2019): 18–21. http://dx.doi.org/10.3126/jcmsn.v15i1.21022.
Full textAbstract:
Background: Iron deficiency is the most common nutritional deficiency in the world. The relation between thyroid hormones and iron status is bidirectional. The aim of this study was to assess iron nutrition status and evaluate its relationship with thyroid hormone profile among children of Eastern Nepal.
 Methods: A community based cross-sectional study was conducted in eastern Nepal. A total of 200 school children aged 6-12 years were recruited after taking informed consent from their guardians. Blood samples were collected and assayed for free thyroid hormones (fT3 and fT4), thyroid stimulating hormone (TSH), serum iron, total iron binding capacity (TIBC) concentration and percentage transferrin saturation was calculated.
 Results: The mean serum iron and TIBC was 74.04 µg/dl and 389.38 µg/dl respectively. The median transferring saturation was 19.21%. The overall prevalence of iron deficiency (Transferrin saturation < 16%) was 34% (n=68). The mean concentration of fT3 and fT4 was 2.87 pg/ml and 1.21 ng/dl respectively, while the median TSH concentration was 3.03 mIU/L. Median TSH concentration in iron deficient group (3.11 µg/dl) and iron sufficient group (2.91 µg/dl) was not significantly different. Among iron deficient children 5.9% had subclinical hypothyroidism (n=4). Iron status indicators were not significantly correlated with thyroid profile parameters in the study population.
 Conclusions: The prevalence of iron deficiency is high and iron deficiency does not significantly alter the thyroid hormone profile in the study region.
6
Mandellos, George J., Michael N. Koukias, Ioannis St Styliadis, and Dimitrios K. Lymberopoulos. "e-SCP-ECG+Protocol: An Expansion on SCP-ECG Protocol for Health Telemonitoring—Pilot Implementation." International Journal of Telemedicine and Applications 2010 (2010): 1–17. http://dx.doi.org/10.1155/2010/137201.
Full textAbstract:
Standard Communication Protocol for Computer-assisted Electrocardiography (SCP-ECG) provides standardized communication among different ECG devices and medical information systems. This paper extends the use of this protocol in order to be included in health monitoring systems. It introduces new sections into SCP-ECG structure for transferring data for positioning, allergies, and five additional biosignals: noninvasive blood pressure (NiBP), body temperature (Temp), Carbon dioxide (CO2), blood oxygen saturation (SPO2), and pulse rate. It also introduces new tags in existing sections for transferring comprehensive demographic data. The proposed enhanced version is referred to as e-SCP-ECG+protocol. This paper also considers the pilot implementation of the new protocol as a software component in a Health Telemonitoring System.
7
Singh, Satyen, Dhananjay Singh, Haneesh Thakur, Ajit Bhardwaj, and Vikas Chawla Chawla. "Air Medical Casualty Evacuation in High Altitude: An Experience of 100 Cases in High Altitude and Hilly Terrain of Northern India." Journal of Medical Sciences and Health 8, no. 2 (2022): 134–38. http://dx.doi.org/10.46347/jmsh.v8i2.21.54.
Full textAbstract:
Objectives: This article describes the on ground challenges faced by the medical care team deployed for transferring critically ill patients by air from remote locations of the high altitude and hilly terrain to definitive health care facility. Methods: All intubated critical patients requiring definitive and super specialty medical care, transferred by air from high altitude hilly terrain to tertiary care hospital during Jan 2016 to Dec year 2020, analyzed in this retrospective study. Results: The total duration of flight was between 40 – 150 min and average being 83 min. Twenty four patients were transferred by fixed wing aircraft and rest 76 by helicopters. All patient were given sedation in form of injection fentanyl 1mcg/kg in dividing doses and boluses of propofol 10 mg intravenously during transfer. The most common change noticed was fall in oxygen saturation with incidence almost 100% of the patients. The mean fall in saturation was 17.29%. Four patients required injection atropine for bradycardia which resulted with decrease of Saturation of peripheral oxygen (SpO2). Conclusion: Transferring a critically ill patient by road to distant medical centers is often not an option because of losing the golden hour of the medical care. Here comes the importance of aeromedical evacuation for a timely transfer for early medical attention. But shifting the critical patients through aerial mode requires planning and poses a variety of challenges. Keywords: Airevacuation, High altitude, Air ambulance
8
Rima, Tamara, Vitayani Muchtar Sri, Amin Safruddin, Seweng Arifin, Sjahril Rizalinda, and Muhammad Adam Andi. "Serum Iron, Total Iron Binding Capacity and Transferrin Saturation Levels in Leprosy Patients before Multi Drug Therapy – World Health Organization (MDT-WHO) Compared with Healthy Control Group." International Journal of Medical Reviews and Case Reports 2, no. 4 (2018): 105–8. https://doi.org/10.5455/IJMRCR.leprosy-transferrin-saturation.
Full textAbstract:
Leprosy is an infectious disease caused by bacteria Mycobacterium leprae. This study aimed at investigating the Serum Iron, Total Iron Binding Capacity and Transferrin Saturation Levels on the leprosy patients compared with the healthy control group. This study is a continuation of previous research that has been studied Hemoglobin and Ferritin Serum Level on Leprosy Patient before Multi Drug Therapy compared with Healthy Control Group. The study was conducted in Dr. Wahidin Sudirohusodo Hospital and other hospitals in Makassar City from March to May 2018. The study used the analytic observational method with the case control study design. Samples were the leprosy patients and the control group of 18 - 52 years old who came to be treated to the dermatovenereology of Dr. Wahidin Sudirohusodo Hospital and other hospitals in Makassar City. As many as 40 samples consisted of 20 samples of the leprosy patients and 20 samples of the control group. This study shows that the iron and transferrin saturation levels in patients with leprosy are significantly lower compared to healthy population. Future studies with larger samples are needed to confirm this relationship. Iron supplementation might be considered in leprosy patients with anemia.
9
Liu, Pengfei, and Liang Xiao. "A Novel Generalized Intensity-Hue-Saturation (GIHS) Based Pan-Sharpening Method With Variational Hessian Transferring." IEEE Access 6 (2018): 46751–61. http://dx.doi.org/10.1109/access.2018.2866489.
Full text
10
*Dr., Naseer Ahmed Memon *Dr. Azizullah Langah *Dr. Juverya Naqvi. "COMPARISON OF SERUM IRON STATUS IN BOTTLE FED AND BREAST FED INFANTS AND ITS EVALUATION BY TRANSFERRIN SATURATION AND TOTAL IRON BINDING CAPACITY." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES 05, no. 10 (2018): 9644–48. https://doi.org/10.5281/zenodo.1450824.
Full textAbstract:
<strong><em>Objective:</em></strong><em> To evaluate the iron status of infants who are breast fed or fed by bottle using transferring saturation and TIBC and comparison of iron status.</em> <strong><em>Study Design:</em></strong><em> This is a randomized cross-sectional study.</em> <strong><em>Place and Duration:</em></strong><em> In the Pediatrics department of People’s Medical College Hospital, Nawabshah for one year duration from October 2016 to October 2017.</em> <strong><em>Subjects and methods:</em></strong><em> Ninety infants of six to eight-month-old divided into three groups and were registered at the pediatric department of People’s Medical College Hospital, Nawabshah and were declared healthy. In addition, group I breastfeeding (human milk), group IIA milk formula was fed and group IIB animal milk was fed. Healthy infants who were reported to be healthy by the preventive pediatric care department were included in the study. Iron supplements were not included, although there were sick babies. The Performa was based on information and laboratory investigations. Standard laboratory procedures for iron, TIBC and transfer saturation were calculated.</em> <strong><em>Results:</em></strong><em> Serum TIBC was in the range of 281-303 μg / dl in lactating group I. 293.67 ± 4.73 was the mean value. In Group IIA (milk formula fed), TIBC ranged from 289.3 ± 6.06 to 280-300 μg / dl. The serum TIBC value in the IIB group (fed with animal milk) was 339-400 μg / dl with an average of 336.60 ± 10.3. The transferrin saturation in the group I was 32.1 ± 1.26 with a mean of 29-35%, in Group IIA with a mean of 35.98 ± 1.66, the mean of Group IIB of 8,52-11,84 was a mean of 32,6-39,2%, averaging 9.87 ± 0.73 .</em> <strong><em>Conclusion:</em></strong><em> The infants’ serum TIBC fed with breast milk and infants fed with formula milk were similar in the same range. The same pattern was observed in Transferrin saturation in these two groups and within normal range. In children fed by animal milk, TIBC was in a lower range with the saturation transfer. Therefore, it must be noted that the status of iron in breast-fed infants is the same as that of formula-fed infants. Iron levels are low in Babies fed with animal milk. Breastfeeding should be encouraged to prevent iron deficiency in infants.</em> <strong>Key words:</strong><em> The capacity of the unit of total inhibition of serum, status of iron, Formula Milk.</em>
11
Li, Ya-jie, and Wei Li. "The Multiobjective Constraint Fault-Tolerant Control of Event-Triggered Nonuniform Transmission for Networked T-S Fuzzy System." Mathematical Problems in Engineering 2016 (2016): 1–22. http://dx.doi.org/10.1155/2016/2307348.
Full textAbstract:
Considering the actuator saturation, the problem of multiobjective constraint fault-tolerant control is studied for networked Takagi-Sugeno (T-S) fuzzy system with nonuniform transmission period under the discrete event-triggered communication scheme (DETCS). A closed-loop T-S fuzzy model, which includes numerous factors such as actuator saturation, actuator failure, event-triggered condition, nonuniform transmission period, and time-delay, is established by transferring the effect caused by the nonuniform update period on the system performance into the effect on the system time-delay. Two stability criterions and two codesign methods for the networked closed-loop failure T-S fuzzy system are developed based on a discontinuous Lyapunov-Krasovskii function, a kind of reciprocally convex technology, a kind of linear convex combination, Jessen inequality, and Wirtinger’s inequality. A feasible experimental solution is presented to verify the effectiveness of the proposed method.
12
Khankeh, Hamid Reza, Razieh Froutan, Masoud Fallahi-Khoshknab, Fazlollah Ahmadi, and Kian Norouzi. "Challenges of Transferring Burn Victims to Hospitals: Experiences of Emergency Medical Services Personnel." Global Journal of Health Science 8, no. 11 (2016): 206. http://dx.doi.org/10.5539/gjhs.v8n11p206.
Full textAbstract:
<p>A thorough understanding of experiences of Emergency Medical Services (EMS) personnel related to the field transfer of burn victims can be used as a prerequisite of quality improvement of pre-hospital clinical care for these kinds of victims. The aim of the present study was to explore the experiences of EMS personnel during transferring burn victims. In this qualitative research, content analysis was performed to explore the experiences and perceptions of a purposeful sample of Iranian EMS personnel (n = 32). Data collection continued until a point of saturation was reached. Data was collected using in-depth semi-structured interview and field observations and analyzed by qualitative inductive content analysis.</p><p>After data analyzing from experiences of pre-hospital emergency personnel during transferring burn victims 7 subcategories were developed and classified into three main categories as challenges of transferring burn victim including; risks during patient transfer, restrictions in the admission of burn victims and uncertainties about patient referral. This study showed that different factors affect the quality of pre-hospital clinical services to the field transfer of burn victims that should be considered to improve the quality of pre-hospital clinical care of burn victims in dynamic programs. Further investigation is needed to explore the process of these crucial services.</p>
13
Sereda, Borys, Borys Khina, and Irina Kruglyak. "THERMODYNAMIC ANALYSIS OF THE GAS MEDIUM IN THE FORMATION OF DIFFUSION COATINGS USING COMPOSITE SATURATING CHARGES." Scientific Journal "Metallurgy", no. 1 (February 17, 2021): 43–49. http://dx.doi.org/10.26661/2071-3789-2020-1-06.
Full textAbstract:
Review of the main processes of formation of diffuse coatings doped with molybdenum,vanadium and tungsten. The basic features of the formation of diffusion layers during chemicalthermaltreatment are considered.: When the SHS is tested, the container is heated to temperaturesof 1173-1330 K. Within 1-2 hours, a diffusion coating is formed due to the saturation of thesurface of structural materials with atoms of saturating elements - Cr, Al, V, Ti, B, W, Mo. Assaturating elements, the defects of these elements and the chemical compounds of these elementswere used, and to determine the possibility of using specific substances, chemical reactionswere considered that can occur in the temperature range of diffusion saturation usingSOS. It should be noted that the metallothermal Reduced oxide, which is used in the synthesisof powder media for CHT, is very fast. When obtaining diffuse layers using the composition ofsaturating the medium, a gas phase is formed, containing spolo-I, I2, I3, H, H2, H3, Cl2, Cl3 withchemical elements. With an increase in temperature, an increase in the amount of halides isobserved. This confirms the possibility of transferring alloying elements for the formation of diffusioncoatings. Also, the amount of products in the gaseous phase increases and condensedproducts are released. It is characteristic that in the temperature range of 700-1500 K, the decompositionof reaction products occurs during CHT, which is confirmed by the production ofdecomposition substances and a sharp increase in the number of gas moles.
14
Scantlebury, Sean, Nessan Costello, Cameron Owen, et al. "Longitudinal changes in anthropometric, physiological, and physical qualities of international women’s rugby league players." PLOS ONE 19, no. 5 (2024): e0298709. http://dx.doi.org/10.1371/journal.pone.0298709.
Full textAbstract:
This is the first study to assess longitudinal changes in anthropometric, physiological, and physical qualities of international women’s rugby league players. Thirteen forwards and 11 backs were tested three times over a 10-month period. Assessments included: standing height and body mass, body composition measured by dual x-ray absorptiometry (DXA), a blood panel, resting metabolic rate (RMR) assessed by indirect calorimetry, aerobic capacity (i.e.,V˙O2max) evaluated by an incremental treadmill test, and isometric force production measured by a force plate. During the pre-season phase, lean mass increased significantly by ~2% for backs (testing point 1: 47 kg; testing point 2: 48 kg) and forwards (testing point 1: 50 kg; testing point 2: 51 kg) (p = ≤ 0.05). Backs significantly increased their V˙O2max by 22% from testing point 1 (40 ml kg-1 min-1) to testing point 3 (49 ml kg-1 min-1) (p = ≤ 0.04). The V˙O2max of forwards increased by 10% from testing point 1 (41 ml kg-1 min-1) to testing point 3 (45 ml kg-1 min-1), however this change was not significant (p = ≥ 0.05). Body mass (values represent the range of means across the three testing points) (backs: 68 kg; forwards: 77–78 kg), fat mass percentage (backs: 25–26%; forwards: 30–31%), resting metabolic rate (backs: 7 MJ day-1; forwards: 7 MJ day-1), isometric mid-thigh pull (backs: 2106–2180 N; forwards: 2155–2241 N), isometric bench press (backs: 799–822 N; forwards: 999–1024 N), isometric prone row (backs: 625–628 N; forwards: 667–678 N) and bloods (backs: ferritin 21–29 ug/L, haemoglobin 137–140 g/L, iron 17–21 umol/L, transferrin 3 g/L, transferring saturation 23–28%; forwards: ferritin 31–33 ug/L, haemoglobin 141–145 g/L, iron 20–23 umol/L, transferrin 3 g/L, transferrin saturation 26–31%) did not change (p = ≥ 0.05). This study provides novel longitudinal data which can be used to better prepare women rugby league players for the unique demands of their sport, underpinning female athlete health.
15
Kerkadi, Abdelhamid, Reem Mohsen Ali, Alaa A. H. Shehada, et al. "Association between central obesity indices and iron status indicators among Qatari adults." PLOS ONE 16, no. 4 (2021): e0250759. http://dx.doi.org/10.1371/journal.pone.0250759.
Full textAbstract:
Co-existence of iron deficiency and obesity in adults has been reported in many countries. However, little is known on the association between obesity and iron deficiency in Qatar. This study aimed to investigate the link between abdominal obesity indices and iron status among adults in Qatar. A random sample of 1000 healthy Qatari adults, aged 20–50 years, was obtained from Qatar Biobank study. Body weight, waist circumference, dual x-ray absorptiometry (DXA) parameters and iron status indicators were measured using standard techniques. Multiple regression analysis was used to examine the associations. The prevalence of iron deficiency and anaemia were 35.4 and 25%, respectively. Of the participants with a large waist circumference, 31.7% had anaemia. Ferritin significantly increased with the increase in the android fat to gynoid fat ratio and visceral fat in both genders. Serum iron and transferring saturation decreased significantly with the increase in waist circumference in women. In both genders, C-reactive protein increased with the increase in all obesity indices. Standardized values of waist circumference, android fat, gynoid fat ratio and visceral fat were significantly associated with log transformed ferritin in men and women. Waist circumference was inversely related to serum iron (β:-0.95, 95% CI:-1.50,-0.39) and transferrin saturation (β:-1.45, 95%CI:-2.46, -0.43) in women. In men, waist circumference was positively associated with haemoglobin level (β: 0.16, 95% CI:0.04, 0.29). Central obesity coexists with anaemia among the study population. Elevated central obesity indices were associated with an increase in ferritin concentration. The increased ferritin concentration may be attributed to the increase in inflammatory status as a result of an increase in c-reactive protein concentration associated with central obesity.
16
Subczynski, Witold K., and Justyna Widomska. "Spin-Lattice Relaxation Rates of Lipid Spin Labels as a Measure of Their Rotational Diffusion Rates in Lipid Bilayer Membranes." Membranes 12, no. 10 (2022): 962. http://dx.doi.org/10.3390/membranes12100962.
Full textAbstract:
The spin-lattice relaxation rate (T1−1) of lipid spin labels obtained from saturation recovery EPR measurements in deoxygenated membranes depends primarily on the rate of the rotational diffusion of the nitroxide moiety within the lipid bilayer. It has been shown that T1−1 also can be used as a qualitative convenient measure of membrane fluidity that reflects local membrane dynamics; however, the relation between T1−1 and rotational diffusion coefficients was not provided. In this study, using data previously presented for continuous wave and saturation recovery EPR measurements of phospholipid analog spin labels, one-palmitoyl-2-(n-doxylstearoyl)phosphatidylcholine in 1,2-dimyristoyl-sn-glycero-3-phosphorylcholine/cholesterol membranes, we show that measured T1−1 values are linear functions of rotational diffusion of spin labels. Thus, these linear relationships can be used to transfer T1−1 values into spin label rotational rates as a precise description of membrane fluidity. This linearity is independent through the wide range of conditions including lipid environment, depth in membrane, local hydrophobicity, and the anisotropy of rotational motion. Transferring the spin-lattice relaxation rates into the rotational diffusion coefficients makes the results obtained from saturation recovery EPR spin labeling easy to understand and readily comparable with other membrane fluidity data.
17
Khasanov, Marat K., Svetlana R. Kildibaeva, Maxim V. Stolpovsky, and Nail G. Musakaev. "Mathematical Model of the Process of Non-Equilibrium Hydrate Formation in a Porous Reservoir during Gas Injection." Mathematics 10, no. 21 (2022): 4054. http://dx.doi.org/10.3390/math10214054.
Full textAbstract:
Increasing the efficiency of natural gas storage in geological formations is possible by transferring gas from a free state to a gas hydrate state, since gas hydrates have a number of unique properties. For example, 1 m3 of methane hydrate contains 164 m3 of gas under normal conditions. It is possible to store a sufficiently large amount of gas in a small volume at a relatively low pressure. To study the regularities of the process of formation of underground gas hydrate gas storage, this article presents a mathematical model of the process of methane injection into a natural reservoir saturated with methane and water, accompanied by the formation of gas hydrate. Unlike previous works, the constructed mathematical model additionally takes into account a number of factors: the filtration flow of water, the real gas properties, the Joule–Thomson effects and adiabatic compression. The process of gas hydrate formation is considered as a non-equilibrium phase transition. Numerical solutions of the problem are constructed that describe the distributions of parameters (temperature, pressure, phase saturations) in a reservoir. Dependences are obtained that reveal the regularities of the process of non-equilibrium formation of gas hydrate in a natural reservoir during gas injection. The influence of gas injection pressure and temperature, as well as reservoir porosity and permeability, on the distributions of pressure, temperature, water saturation and hydrate saturation in the reservoir, as well as on the dynamics of changes in these parameters and the mass of gas hydrate formed in the reservoir over time, are analyzed.
18
Chang, Wen-Jer, Yu-Wei Lin, Yann-Horng Lin, Chin-Lin Pen, and Ming-Hsuan Tsai. "Actuator Saturated Fuzzy Controller Design for Interval Type-2 Takagi-Sugeno Fuzzy Models with Multiplicative Noises." Processes 9, no. 5 (2021): 823. http://dx.doi.org/10.3390/pr9050823.
Full textAbstract:
In many practical systems, stochastic behaviors usually occur and need to be considered in the controller design. To ensure the system performance under the effect of stochastic behaviors, the controller may become bigger even beyond the capacity of practical applications. Therefore, the actuator saturation problem also must be considered in the controller design. The type-2 Takagi-Sugeno (T-S) fuzzy model can describe the parameter uncertainties more completely than the type-1 T-S fuzzy model for a class of nonlinear systems. A fuzzy controller design method is proposed in this paper based on the Interval Type-2 (IT2) T-S fuzzy model for stochastic nonlinear systems subject to actuator saturation. The stability analysis and some corresponding sufficient conditions for the IT2 T-S fuzzy model are developed using Lyapunov theory. Via transferring the stability and control problem into Linear Matrix Inequality (LMI) problem, the proposed fuzzy control problem can be solved by the convex optimization algorithm. Finally, a nonlinear ship steering system is considered in the simulations to verify the feasibility and efficiency of the proposed fuzzy controller design method.
19
Svenmarker, Staffan, Micael Appelblad, Sören Häggmark, Erica Jansson, and Ronny Lindholm. "The Relationship Between Oxygen Transfer and FIO2 in a Clinical Study of the AffinityTM Hollow Fiber Oxygenator." Journal of ExtraCorporeal Technology 28, no. 1 (1996): 13–15. http://dx.doi.org/10.1051/ject/199628113.
Full textAbstract:
On-line computation of body oxygen consumption (V̇O2) was performed in twelve (n=12) cardiac surgical patients utilizing cardiopulmonary bypass. Two in-line monitors, the CDI 400™ and CDI 100™ were interfaced with a personal computer. Arterial oxygen partial pressure, saturation and temperature from the CDI 400™ and venous saturation and hemoglobin values from the CDI 100™ enabled a real time computerized V̇O2 calculation. Paired V̇O2 and fractions of inspired oxygen (FIO) values made it possible to plot an oxygen transfer equation (OTE) for the AVECOR Affinity™ hollow fiber oxygenator. Regression analysis of 124 V̇O2-FIO2 pairs established the following relationship: V̇O2 = 368.4 * FIO2 - 15.6, with a correlation of 0.89 (p<0.001). This regression line presented as an OTE-plot suggests that the Affinity™ oxgenator is capable of transferring approximately 350 ml/min of oxygen at an FIO2 = 1.0. In conclusion, on-line CPB-monitoring interfaced with a personal computer may be used for real time V̇O2 - calculations and to establish an oxygen transfer equation of a given oxygenator.
20
Kim Oanh, Vuong Thi. "FABRICATION OF Fe3O4 MAGNETIC FLUID BY POLY (ACRYLIC ACID) FOR BIOMEDICAL APPLICATIONS." Vietnam Journal of Science and Technology 54, no. 1A (2018): 261. http://dx.doi.org/10.15625/2525-2518/54/1a/11836.
Full textAbstract:
Fe3O4 nanosystems of different sizes were synthesized by thermal decomposition method in organic solvent. Magnetic fluid based on Fe3O4 nanoparticles was prepared by using poly acrylic acid (PAA) as a phase transfer agent. The structure, morphology and magnetic properties of samples were studied by: X-ray diffraction patterns (XRD), transmission electron microscope (TEM), and vibrating sample magnetometer (VSM). XRD results indicated that all samples had spinel single phase structure with average crystaline size less than 15 nm. TEM images showed that the average size of samples were nearly equal to those of XRD. The highest value of saturation magnetization obtained at room temperature for the sample synthesized at optimal reaction time and temperature (2 hours and 298 oC, respectively) after phase transferring was 75 emu/g. The linkage between magnetic nanoparticles’ surface and functional groups of PAA was confirmed by FT-IR spectra. Simultaneously, the particle size and stability of magnetic fluid were evaluated by DLS and Zeta potential. These results demonstrated the narrow size distribution and high stability of nanosystem. The important point was that the phase transfer contributed to enhance of saturation magnetization of samples (about 5 % of the initial ones). Magnetic fluid based on Fe3O4 nanoparticles with high homogeneity, high saturation magnetization and good stability promised a potential application in biomedical, especially in magnetic hyperthermia and contrast-enhanced magnetic resonance imaging.
21
Gao, Feng Hua, Zhong Bo Yu, Xing Chen, and Hong Wei Liu. "Study on Hillslope Hydrodynamics Process and Catchment Runoff Producing Pattern in Humid Area." Applied Mechanics and Materials 212-213 (October 2012): 264–67. http://dx.doi.org/10.4028/www.scientific.net/amm.212-213.264.
Full textAbstract:
Hydrologic cycle was the supporter of pollution matter transportation, and the transferring of agricultural non-point source pollution from land to water has great relationship with hydrologic process. As part study of agricultural non-point source pollution matter transferring mechanics in small watershed, we studied the soil water movement, overland flow producing and confluence mechanism at the hillslope and watershed scales during storm events in humid area. This study monitored the overland flow, soil moisture, groundwater and the stream flow at outlet of the watershed during two storm events (July 19th 2008 and July 30th 2009), analyzed the rain-runoff producing patterns under different conditions and their impact factors. In humid area, soil water movement had three patterns, rainfall infiltration, lateral subsurface flow and groundwater rising, their ranges of influence depths were decided by the rainfall amount, duration and intensity, antecedent conditions and the soil physical characteristics. The overland runoff was infiltration excess runoff at the leading portion of the event, and changed gradually into the mixed patterns of infiltration excess runoff and saturation excess runoff. There was a large amount of regression water on the falling limb of the stream flow. The sources of the stream flow at the outlet of watershed contributed much to the non-point source pollution transportation pathways.
22
Fan, Yunsheng, Bowen Liu, Guofeng Wang, and Dongdong Mu. "Adaptive Fast Non-Singular Terminal Sliding Mode Path Following Control for an Underactuated Unmanned Surface Vehicle with Uncertainties and Unknown Disturbances." Sensors 21, no. 22 (2021): 7454. http://dx.doi.org/10.3390/s21227454.
Full textAbstract:
This paper focuses on an issue involving robust adaptive path following for the uncertain underactuated unmanned surface vehicle with time-varying large sideslips angle and actuator saturation. An improved line-of-sight guidance law based on a reduced-order extended state observer is proposed to address the large sideslip angle that occurs in practical navigation. Next, the finite-time disturbances observer is designed by considering the perturbations parameter of the model and the unknown disturbances of the external environment as the lumped disturbances. Then, an adaptive term is introduced into Fast Non-singular Terminal Sliding Mode Control to design the path following controllers. Finally, considering the saturation of actuator, an auxiliary dynamic system is introduced. By selecting the appropriate design parameters, all the signals of the whole path following a closed-loop system can be ultimately bounded. Real-time control of path following can be achieved by transferring data from shipborne sensors such as GPS, combined inertial guidance and anemoclinograph to the Fast Non-singular Terminal Sliding Mode controller. Two examples as comparisons were carried out to demonstrate the validity of the proposed control approach.
23
Goyal, Abhishek, Bishav Mohan, Kavita Saggar, and Gurpreet Singh Wander. "Primary haemochromatosis resulting in dilated cardiomyopathy arising out of mutation in HJV gene in Indian patients: a rare scenario." BMJ Case Reports 13, no. 9 (2020): e235650. http://dx.doi.org/10.1136/bcr-2020-235650.
Full textAbstract:
Primary haemochromatosis (PH) is a genetic disorder of iron metabolism with multiorgan involvement due to mutations in HFE or more rarely haemojuvelin (HJV) gene. Cardiac involvement results in dilated cardiomyopathy with reduced ejection fraction and progressive heart failure. PH is rarely reported from India and cardiomyopathy due to PH from HJV mutations is thought to be uncommon. We report two families with cardiomyopathy resulting from PH. Diagnosis was suspected on the basis of skin pigmentation, markedly elevated serum ferritin and transferring saturation. Genetic testing revealed a rare mutation in HJV gene in one family. Being a treatable condition, PH should be suspected and investigated in cardiomyopathy patients in Indian subcontinent. If HFE is negative, analysis of non-HFE mutation should always be considered.
24
Wang, Jianbiao, Qishi Fan, Hourong Shi, Ping Zhu, and Bin Qu. "Identification of Different Iron Status and Prediction of the Response to Therapy with rHuEpo in Patients with Chronic Renal Failure under Hemodialysis Treatment." Blood 110, no. 11 (2007): 2681. http://dx.doi.org/10.1182/blood.v110.11.2681.2681.
Full textAbstract:
Abstract There are two primary concerns in the management of patients with chronic renal failure (CRF) under hemodialysis who are receiving rHEpo for anemia - determine the ideal dose of iron and predict the response to the rHEpo therapy used to treat their anemia. The classic parameters used for monitoring iron therapy in these patients are Transferrin Saturation (TSAT %) and Ferritin (Ferr) concentration. Recently some new red cell parameters have been proposed to support these existing markers as the new research use only (RUO) tests, called Low Hemoglobin Density % (@LHD%®) and Microcytic Anemia Factor (@Maf®), produced by the LH 700 Series hematology analyzers We also have analysed the best hematological parameters to support TSAT % and Ferritin and the best predictors to predict the response to therapy. A total of 30 adult renal dialysis patients receiving EPO for treatment of anemia secondary to end-stage renal disease were enrolled over a six month period from March to August, 2006. The patients were stable with regard to dialysis treatment for at least 3 months prior to entry into the study. Patients had frequent follow up during therapy, consisting of CBC, auto-differential, automated retic %, absolute #, IRF, MRV and RUO parameters. The testing schedule followed the hospital’s existing standard of care with CBC, WBC Differential and Reticulocyte measurements being performed monthly. Iron levels and iron binding capacity were measured before the beginning the study, and then monthly for the duration of the study. These and other chemistry tests were performed on the Beckman Coulter DxC and DxI chemistry and immunoassay instruments and included serum Ferritin, serum iron, TIBC, Transferrin, transferrin saturation, and CRP. A 1 ml aliquot of serum from each sample was frozen for possible additional testing later (soluble transferring receptor (sTfR), etc.). The patients’ anemias were classified using their ferritin and transferrin saturation according to the KDOQI guidelines as Absolute Iron Deficiency (AID), Functional Iron Deficiency (FID) and any iron deficiency: AID or FID (any ID). CRP results were considered in the diagnosis. A response to the rHEpo therapy was defined as an increase in Hemoglobin concentration of 1 g/dL in 2 months, with a minimum increase of 0.3 g/dL per month. The patients’ results were classified as responder or non-responder based on the delta Hgb and delta reticulocyte results from month to month There were 29.3% (41/140) classified as responders. Using a Mann-Whitney test, significant differences (p<0.05) were found for @LHD%, @MAF, MCH comparing patients with TSAT% <20% vs TSAT%>20% and @LHD% for patients with Ferritin <100 ng/mL vs Ferritin> 100 ng/mL) The best RBC parameters for detecting the types of anemias found in these patients were: Detection of IDA was @LHD%® (>4.7%) Detection of FID: MCH (<29.1 g/dL) and @LHD%® (>6.1%) Detection of any ID (AID or FID): @LHD%® (>4.7%) and MCH (<30 g/dL) The best parameter for the prediction of the response to therapy as indicated by an increase in Hgb is @Maf® (<9.2) with a ROC Area under the curve of 0.714. Red Cell parameters can complement the classic parameters used to detect Iron deficiency and predict the response to therapy. The value of these findings to the clinician is that when the classic chemistry parameters are borderline or indeterminate, these new red cell parameters can be use to arrive at a definitive diagnosis and ensure the correct treatment option. @ Research use only parameters
25
Gobin, J., and M. A. Horwitz. "Exochelins of Mycobacterium tuberculosis remove iron from human iron-binding proteins and donate iron to mycobactins in the M. tuberculosis cell wall." Journal of Experimental Medicine 183, no. 4 (1996): 1527–32. http://dx.doi.org/10.1084/jem.183.4.1527.
Full textAbstract:
To multiply and cause disease in the host, Mycobacterium tuberculosis must acquire iron from the extracellular environment at sites of replication. To do so, the bacterium releases high-affinity iron-binding siderophores called exochelins. In previous studies, we have described the purification and characterization of the exochelin family of molecules. These molecules share a common core structure with another type of high-affinity iron-binding molecule located in the cell wall of M. tuberculosis: the mycobactins. The water-soluble exochelins differ from each other and from water insoluble mycobactins in polarity, which is dependent primarily upon the length and modifications of an alkyl side chain. In this study, we have investigated the capacity of purified exochelins to remove iron from host high-affinity iron-binding molecules, and to transfer iron to mycobactins. Purified desferri-exochelins rapidly removed iron from human transferrin, whether it was 95 or 40% iron saturated, its approximate percent saturation in human serum, and from human lactoferrin. Desferri-exochelins also removed iron, but at a slower rate, from the iron storage protein ferritin. Purified ferri-exochelins, but not iron transferrin, transferred iron to desferri-mycobactins in the cell wall of live bacteria. To explore the possibility that the transfer iron from exochelins to mycobactins was influenced by their polarity, we investigated the influence of polarity on the iron affinity of exochelins. Exochelins of different polarity exchanged iron equally with each other. This study supports the concept that exochelins acquire iron for M. tuberculosis by removing this element from host iron-binding proteins and transferring it to desferri-mycobactins in the cell wall of the bacterium. The finding that ferri-exochelins but not iron transferrin transfer iron to mycobactins in the cell wall underscores the importance of exochelins in iron acquisition. This study also shows that the variable alkyl side chain on the core structure of exochelins and mycobactins, the principal determinant of their polarity, has little or no influence on their iron affinity.
26
Mukhopadhyay, Adwitiya, Sidharth Sreekumar, Bobin Xavier, and Suraj M. "A Cloud-Based Smartphone Solution for Transmitting Bio-Signals From an Emergency Response Vehicle." International Journal of E-Health and Medical Communications 10, no. 3 (2019): 22–38. http://dx.doi.org/10.4018/ijehmc.2019070102.
Full textAbstract:
Most developing countries are currently unable to provide adequate, let alone advanced healthcare support to rural areas. Telemedicine combines the capability of information technology and dedicated people working towards the common goal of providing good quality healthcare in remote areas. In this article, the authors propose a system that can be used to transmit patient vitals like pulse rate, oxygen saturation, and perfusion index readings to a doctor in a remote area, while a patient is in transit. This system uses a smartphone application, a pulse oximeter, and the real-time data transferring capabilities of Firebase (a cloud database). The application has been tested under various network conditions which includes connection types such as 2G (2nd Generation), 3G (3rd Generation), 4G (4th Generation), and Fiber To The Home (FTTH). The work also discusses the possible reasons for the higher performance found in 4G networks over 3G and 2G cellular connections.
27
McLaren, Christine E., Kuo-Tung Li, Victor R. Gordeuk, Victor Hasselblad, and Gordon D. McLaren. "Relationship between transferrin saturation and iron stores in the African American and US Caucasian populations: analysis of data from the third National Health and Nutrition Examination Survey." Blood 98, no. 8 (2001): 2345–51. http://dx.doi.org/10.1182/blood.v98.8.2345.
Full textAbstract:
Abstract In previous analyses of transferrin saturation data in African Americans and Caucasians from the second National Health and Nutrition Examination Survey (NHANES II), subpopulations were found consistent with population genetics for common loci that influence iron metabolism. The goal of this new study was to determine if these transferrin saturation subpopulations have different levels of iron stores. Statistical mixture modeling was applied to transferrin saturation data for African Americans and Caucasians from the third National Health and Nutrition Examination Survey (NHANES III), and then the mean serum ferritin concentrations were determined for the transferrin saturation subpopulations that were identified. After adjustment for diurnal variation, 3 subpopulations of transferrin saturation were identified in each racial group. Satisfying Hardy-Weinberg conditions for major locus effects, in both racial groups the sum of the square roots of the proportion with the lowest mean transferrin saturation and the proportion with the highest mean transferrin saturation was approximately 1. When weighted to reflect the US adult population as a whole, these subpopulations of increasing transferrin saturations had progressively increasing mean age-adjusted serum ferritin concentration values in each ethnic grouping as stratified by sex (trend test, P &lt; .002 for all). These results are consistent with the concept that population transferrin saturation subpopulations reflect different levels of storage iron.
28
Yoon, Won-Byong. "Effects of Particle Size and High Pressure Process on the Extraction Yield of Oil Compounds from Soybean Powder Using Hexane and Supercritical Fluid." Food Engineering Progress 15, no. 3 (2011): 203–8. http://dx.doi.org/10.13050/foodengprog.2011.15.3.203.
Full textAbstract:
Effects of particle size and high pressure processing on the extraction rate of oil compounds from soybean powder were evaluated by Soxhlet method using hexane and supercritical fluid extraction (SFE) using CO2. SFE was carried out at 4,000 psi and 50°C for 4 hr. The mean particle sizes were varied from 26.7 to 862.0 μm by controlling milling time. Saturation solubility increased as the particle size decreased. At large particle size, high pressure processing (HPP) showed higher extraction yield in both hexane extraction and SFE, but as the particle size decreased, the HPP was irrelevant to the extraction yield in SFE. The higher extraction rate was obtained from the smaller particle size. The scanning electronic microscopy of soybean powder treated by HPP showed pores on the surface of the particle. The higher extraction rate and yield from HPP treatment might be due to the less internal resistance of transferring the solvent and miscellar in the solid matrix by collapsing of tissues.
29
Prasad Yadav, Shatrughna, and Subhash Chandra Bera. "PAPR Reduction for Improved Efficiency of OFDM Modulation for Next Generation Communication Systems." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 5 (2016): 2310. http://dx.doi.org/10.11591/ijece.v6i5.10878.
Full textAbstract:
<p>Highly linear power amplifiers are required for transferring large amount of data for future communication. Orthogonal frequency division multiplexing (OFDM) provides high data rate transmission capability with robustness to radio channel impairments. It has been widely accepted for future communication for different services. But, it suffers from high value of peak-to-average power ratio (PAPR). High value of PAPR drives high power amplifier into its saturation region and causes it to operate in the nonlinear region. In this paper, comparative study of four different PAPR reduction techniques: clipping and filtering (CF), selective mapping method (SLM), partial transmit sequence (PTS) and DFT- spread technique have been done. Mathematical modeling and Matlab simulations have been performed to arrive at the results with 4 QAM modulation format and 1024 number of sub carriers. At 0.01 % of complementary cumulative distribution function (CCDF) significant reduction of 11.3, 3.5, 3.4 and 1.0 dB have been obtained with DFT- spread, SLM, PTS and CF techniques respectively.</p>
30
Prasad Yadav, Shatrughna, and Subhash Chandra Bera. "PAPR Reduction for Improved Efficiency of OFDM Modulation for Next Generation Communication Systems." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 5 (2016): 2310. http://dx.doi.org/10.11591/ijece.v6i5.pp2310-2321.
Full textAbstract:
<p>Highly linear power amplifiers are required for transferring large amount of data for future communication. Orthogonal frequency division multiplexing (OFDM) provides high data rate transmission capability with robustness to radio channel impairments. It has been widely accepted for future communication for different services. But, it suffers from high value of peak-to-average power ratio (PAPR). High value of PAPR drives high power amplifier into its saturation region and causes it to operate in the nonlinear region. In this paper, comparative study of four different PAPR reduction techniques: clipping and filtering (CF), selective mapping method (SLM), partial transmit sequence (PTS) and DFT- spread technique have been done. Mathematical modeling and Matlab simulations have been performed to arrive at the results with 4 QAM modulation format and 1024 number of sub carriers. At 0.01 % of complementary cumulative distribution function (CCDF) significant reduction of 11.3, 3.5, 3.4 and 1.0 dB have been obtained with DFT- spread, SLM, PTS and CF techniques respectively.</p>
31
Xiao, Zong Hu. "Photoelectric Properties of High Power GaN Based LEDs on Cu/Cr Composite Substrates." Advanced Materials Research 1004-1005 (August 2014): 362–66. http://dx.doi.org/10.4028/www.scientific.net/amr.1004-1005.362.
Full textAbstract:
The thermal problems of high power LEDs could be solved effectively and the stability of the device could be also improved, employing metal substrates for high power LEDs. In this paper,high power GaN based blue LEDs on metal substrates were successfully prepared by transferring GaN-based LED epitaxial film on Si (111) substrates to the Cu/Cr composite substrates employing electroplating method. The forward voltage of the as-prepared LEDs was 3.4 V, when the forward operating current was 350 mA, which was similar with the level of market products. The corresponding voltage could reach 25 V when reverse current was 10 μA, better than the level of market products. It showed good anti-saturation property when forward current varied from 0 mA to 1200 mA. The stability of wavelength vs current was also favourable, which the peak wavelength shifted to long wavelength about 1nm in the test range of 10 mA to 1200 mA.
32
Fukumoto, Kensuke, Junki Yoshii, Yuto Hirasawa, Takashi Yamazoe, Shoji Yamamoto, and Norimichi Tsumura. "Unglossy to Glossy Image Conversion Using Deep Photo Style Transfer." Journal of Imaging Science and Technology 64, no. 1 (2020): 10506–1. http://dx.doi.org/10.2352/j.imagingsci.technol.2020.64.1.010506.
Full textAbstract:
Abstract In this paper, we propose a method of image conversion that changes unglossy images into glossy ones using deep photo style transfer. This style of transfer is expected to reproduce the desired image with a metallic appearance based on the technique used for texture transfer. A practical challenge was undertaken to create a gold, metallic image by transferring the style images of a gold ingot. To avoid excessive loss of color balance, we applied the YCrCb separation technique and used only the Y component to reproduce a glossy appearance. The luminance and saturation of the style image were altered to investigate the influence on the convergence of appearance because the converted images should be dependent on the contents of the images. The results of transfer were assessed by subjective evaluation using the semantic differential method. A style image with an appropriate amount of change in contrast was found suitable for an appropriate glossy appearance. Moreover, contrast in the style image can be appropriately chosen depending on the contents of the original images.
33
Dominguez-Quintans, Camelia, V. Santiago Quinteros, J. Antonio H. Carraro, Lidija Zdravkovic, and Richard J. Jardine. "Quality assessment of a new in-mould slurry deposition method for triaxial specimen reconstitution of clean and silty sands." E3S Web of Conferences 92 (2019): 02010. http://dx.doi.org/10.1051/e3sconf/20199202010.
Full textAbstract:
An innovative specimen reconstitution technique for sandy and silty soils that simulates underwater deposition is presented and evaluated. The technique is an upgraded version for triaxial testing of the well-established slurry deposition method. This novel setup integrates the reconstitution mould and the mixing tube into a single unit to avoid transferring the sample from the mixing tube to the mould. This subtle, but critical, modification enables reconstitution of very loose specimens as sample transfer disturbance, which can be significant, is eliminated. The quality of specimens prepared by the new reconstitution method was assessed by experiments on a clean sand from the UK (Ham River sand) and a silty sand from Norway (Øysand). The method, as any slurry-based procedure, is capable of producing homogeneous specimens with high initial degree of saturation, even in the absence of back pressure. The procedure is shown to be suitable for sands with or without fines. Moreover, the new method is able to achieve a wide range of initial void ratios, from very loose to very dense, without imposing any particle crushing in the latter case.
34
Gordeuk, Victor R., Christine E. McLaren, Anne C. Looker, Victor Hasselblad, and Gary M. Brittenham. "Distribution of Transferrin Saturations in the African-American Population." Blood 91, no. 6 (1998): 2175–79. http://dx.doi.org/10.1182/blood.v91.6.2175.
Full textAbstract:
Abstract To determine if transferrin saturations in African Americans may reflect the presence of a gene that influences iron metabolism, we analyzed the distribution of these values in 808 African Americans from the second National Health and Nutrition Survey. We tested for a mixture of three normal distributions consistent with population genetics for a major locus effect in which the proportion of normal homozygotes is p2; of heterozygotes, 2pq; of affected homozygotes, q2; and in which p+q= 1. Three subpopulations based on transferrin saturation were present (P < .0001) and the fit to a mixture of three normal distributions was good (P = .2). A proportion of .009 was included in a subpopulation with a mean ± standard deviation transferrin saturation of 63.4% ± 5.7% (postulated homozygotes for a gene that influences iron metabolism), while a proportion of .136 had an intermediate saturation of 38.0% ± 5.7% (postulated heterozygotes) and .856 a saturation of 24.6% ± 5.7% (postulated normal homozygotes). These proportions were consistent with population genetics because the sum of the square roots of the proportions with the lowest mean transferrin saturation (P = .925) and the highest (q = 0.093) was approximately 1 (1.018). The results are consistent with the presence in African Americans of a common locus that influences iron metabolism.
35
Gordeuk, Victor R., Christine E. McLaren, Anne C. Looker, Victor Hasselblad, and Gary M. Brittenham. "Distribution of Transferrin Saturations in the African-American Population." Blood 91, no. 6 (1998): 2175–79. http://dx.doi.org/10.1182/blood.v91.6.2175.2175_2175_2179.
Full textAbstract:
To determine if transferrin saturations in African Americans may reflect the presence of a gene that influences iron metabolism, we analyzed the distribution of these values in 808 African Americans from the second National Health and Nutrition Survey. We tested for a mixture of three normal distributions consistent with population genetics for a major locus effect in which the proportion of normal homozygotes is p2; of heterozygotes, 2pq; of affected homozygotes, q2; and in which p+q= 1. Three subpopulations based on transferrin saturation were present (P < .0001) and the fit to a mixture of three normal distributions was good (P = .2). A proportion of .009 was included in a subpopulation with a mean ± standard deviation transferrin saturation of 63.4% ± 5.7% (postulated homozygotes for a gene that influences iron metabolism), while a proportion of .136 had an intermediate saturation of 38.0% ± 5.7% (postulated heterozygotes) and .856 a saturation of 24.6% ± 5.7% (postulated normal homozygotes). These proportions were consistent with population genetics because the sum of the square roots of the proportions with the lowest mean transferrin saturation (P = .925) and the highest (q = 0.093) was approximately 1 (1.018). The results are consistent with the presence in African Americans of a common locus that influences iron metabolism.
36
Sültemeyer, Dieter F., Heinrich P. Fock, and David T. Canvin. "Active uptake of inorganic carbon by Chlamydomonas reinhardtii: evidence for simultaneous transport of HCO3− and CO2 and characterization of active CO2 transport." Canadian Journal of Botany 69, no. 5 (1991): 995–1002. http://dx.doi.org/10.1139/b91-128.
Full textAbstract:
Washed protoplasts of low CO2 grown cells of Chlamydomonas reinhardtii were used to further characterize the ability for active CO2 transport. The CO2 transport mechanism and the high affinity for dissolved inorganic carbon were completely induced within 4 h after transferring 5% CO2 grown cells to ambient air (0.035% CO2). Net O2 evolution and CO2 uptake were saturable processes showing saturation between 100 and 200 μM DIC (1.6–3.2 μM CO2) at pH 8.0. For both O2 evolution in whole cells and CO2 uptake in the protoplasts the concentration of dissolved inorganic carbon required for 50% of the maximal rates was about 12 μM (= 0.20 μM CO2). Studies with 3-(3,4-dichloro-phenyl)-1,1 dimethylurea, dibromo-thymoquinone, tetramethyl phenylenediamine and protoplasts of a cytochrome c oxidase deficient mutant of C. reinhardtii indicated the CO2 transport was driven by cyclic or pseudocyclic ATP formation and oxidative phosphorylation was not involved. These studies also show that CO2 transport and CO2 fixation are distinct mechanisms and that active CO2 uptake may occur in the absence of CO2 fixation. Key words: Chlamydomonas reinhardtii; CO2–HCO3− concentrating mechanism, CO2 transport, cyclic photophosphorylation, pseudocyclic photophosphorylation.
37
Zuta, John, and Ingebret Fjelde. "Transport of CO2-Foaming Agents During CO2-Foam Processes in Fractured Chalk Rock." SPE Reservoir Evaluation & Engineering 13, no. 04 (2010): 710–19. http://dx.doi.org/10.2118/121253-pa.
Full textAbstract:
Summary The coinjection of carbon dioxide (CO2) and a CO2-foaming agent to form stable CO2 foam has been found to improve the sweep efficiency during CO2-foam processes in carbonate reservoirs. However, only a few studies of CO2-foam transport in fractured rock have been reported. In fractured chalk reservoirs with low matrix permeability, the aqueous CO2-foaming-agent solution will flow mainly through the fractures. The total retention of the CO2-foaming agent in the reservoir will depend on how much of the matrix is contacted by the CO2-foaming-agent solution during the project period and, therefore, on its transport rate into the matrix. This paper presents results from a series of static and flowthrough experiments carried out to investigate the transport and retention phenomena of CO2-foaming agents in fractured chalk models at 55°C. Fractured chalk models with 100% water-saturation and residual-oil saturation after waterflooding were used. In the static experiments, the fractured model was created by transferring core plugs with different diameters into steel cells with an annulus space around the plugs. The fracture volume was filled with foaming-agent solutions with different initial concentrations. The experiments were carried out in parallel, with liquid samples regularly taken out from the fracture above the plugs and analyzed for the foaming-agent concentration. The experiments were monitored until the concentrations in the fractures reached a plateau. At specific and constant concentrations of the foaming agent in the fractures, the plugs were demounted and samples drilled out along the whole lengths of the plugs from the outer, middle, and center portions. These samples were analyzed for foaming-agent concentration to determine how much of it had penetrated the matrix. Results indicate that the transport of the foaming-agent decreases toward the center of the plugs with 100% water-saturation and residual-oil saturation after waterflooding. Modeling of the static experiments using the Computer Modelling Group (CMG)'s commercial reservoir simulator STARS was also carried out to determine the transport rate for the foaming agent. A good history match between experimental and modeling results was obtained. In the flow-through experiments, the fractured model was created by drilling a concentric hole through the center of the plug. The hole, simulating an artificial fracture, was filled with glass beads of different dimensions. Fractured models with different effective permeability were flooded with equal volumes of the foaming-agent solution. Results show that the transport of CO2-foaming agent into the matrix is slower in the fractured models than in the homogeneous models with viscous flooding of the rock.
38
Benyamin, Beben, Grant W. Montgomery, Nicholas G. Martin, and John B. Whitfield. "Transferrin Saturation and Mortality." Clinical Chemistry 57, no. 6 (2011): 921–23. http://dx.doi.org/10.1373/clinchem.2011.162784.
Full text
39
Shou-long, Wang, Li Ai-fen, Peng Rui-gang, Yu Miao, and Fu Shuai-shi. "Study on the Flow Characteristics of Shengli Oilfield Super Heavy Oil." Open Fuels & Energy Science Journal 10, no. 1 (2017): 69–78. http://dx.doi.org/10.2174/1876973x01710010069.
Full textAbstract:
Objective:The rheological properties of oil severely affect the determination of percolation theory, development program, production technology and oil-gathering and transferring process, especially for super heavy oil reservoirs. This paper illustrated the basic seepage morphology of super heavy oil in micro pores based on its rheological characteristics.Methods:The non-linear flow law and start-up pressure gradient of super heavy oil under irreducible water saturation at different temperatures were performed with different permeable sand packs. Meanwhile, the empirical formulas between start-up pressure gradient, the parameters describing the velocity-pressure drop curve and the ratio of gas permeability of a core to fluid viscosity were established.Results:The results demonstrate that temperature and core permeability have significant effect on the non-linear flow characteristics of super heavy oil. The relationship between start-up pressure gradient of oil, the parameters representing the velocity-pressure drop curve and the ratio of core permeability to fluid viscosity could be described as a power function.Conclusion:Above all, the quantitative description of the seepage law of super heavy oil reservoir was proposed in this paper, and finally the empirical diagram for determining the minimum and maximum start-up pressure of heavy oil with different viscosity in different permeable formations was obtained.
40
Capatanos, Sara E. "Is Serum Iron and Iron Binding Capacity Important for Diagnosis of Iron Deficiency?" Blood 118, no. 21 (2011): 4750. http://dx.doi.org/10.1182/blood.v118.21.4750.4750.
Full textAbstract:
Abstract Abstract 4750 Introduction: Diagnosis of iron deficiency remains a common diagnostic dilemma. While gold standard bone marrow biopsies are impractical and invasive, serum ferritin is the most sensitive and specific test available.2 Some recent studies define iron deficiency by transferrin saturations (serum iron/TIBCx100) less than 20% without concurrently low ferritin (<100 ng/mL).1 A literature search shows there is no substantial data to support the practice of assuming iron deficiency with low iron saturations in the absence of a ferritin <100 ng/mL. Published data have documented a sensitivity and specificity of 98% with serum ferritin levels <41 ng/mL in patients without inflammation.3 Data with inflammation reveals that ferritin levels over 100 ng/mL exclude diagnosis of iron deficiency for the majority of patients.2-4 In patients with liver disease, no serum test has been shown to be accurate. 5 Unnecessary treatment with iron confers significant risks. Iron treatment in patients with ferritin levels >100ng/mL has been linked to adverse outcome and impaired immunity in a non-dialyzed population.6 Prioritizing transferrin saturation over serum ferritin as diagnostic test for iron deficiency may lead to inaccurate diagnosis and unnecessary treatment with iron. To determine the rate of potential misdiagnosis in iron deficiency based on low iron saturations, we performed an analysis of unselected iron panels over a year. Methods: Analysis involved a retrospective review of 2,846 unselected patients. Records were reviewed to correlate iron saturations with ferritin levels at the San Diego Veteran's Affairs Hospital from December 2008-December 2009. The study was approved by the UCSD Internal Review Board. Low iron saturations were compared to ferritin levels of <15, <30, <45, <60, <100 and >100 ng/mL using Spearman Correlation Coefficients. Low iron saturation is defined as less than 20%. Results: 502 patients (47%) with low iron saturations (<20%) had ferritin levels over 100 ng/mL. 151 patients (30%) with ferritin levels under 40 ng/mL had elevated iron saturations. Ferritin values <30ng/mL, and ferritin levels >100ng/mL(spearman correlation, 0.18/p-value 0.006, 0.2/p-value <0.0001) have the strongest correlation to iron saturation levels. Ferritin levels between 30 and 60ng/mL do not have any statistical correlation to iron saturation levels. (Figure 2) Conclusions: From our data, relying on iron saturations in lieu of ferritin levels could result in a high rate of misdiagnosis. For patients who are ill or have inflammation, relying on low iron saturation despite a ferritin over 100 ng/mL, may result in potential misdiagnosis in up to 47% of patients. Ferritin levels less than 30 ng/mL are sufficient for diagnosis of iron deficiency, without additional testing of iron level and TIBC for most patients.2,3 Ferritin levels >100 ng/mL are sufficient for excluding iron deficiency in most patients, except for liver cirrhosis/hepatitis patients.2-5Ferritin levels above 100 ng/mL and below 30 ng/mL have a statistically significant correlation to iron saturation levels, raising the question whether additional iron studies are warranted in these patients. If ferritin levels between 30 ng/mL and 60 ng/mL do not have statistical correlation with iron saturation levels, perhaps a serum transferrin receptor quantification or bone marrow exam would provide more conclusive evidence in this group. Ordering only serum ferritin or algorithmic testing, instead of a traditional iron panel, will eliminate excess testing and improve accurate diagnosis. Disclosures: No relevant conflicts of interest to declare.
41
Brissot, Pierre, and Éolia Brissot. "How we interpret transferrin saturation." Hématologie 23, no. 6 (2017): 406–12. http://dx.doi.org/10.1684/hma.2017.1304.
Full text
42
Barton, James C., Luigi F. Bertoli, Mark R. Janich, M. Wendy Arthur, and Thomas J. Alford. "Normal Transferrin Saturation in Hemochromatosis." Hospital Practice 26, sup3 (1991): 45–48. http://dx.doi.org/10.1080/21548331.1991.11704285.
Full text
43
Sidorov, M. V., A. V. Lavrov, V. A. Voronin, and A. V. Sidorova. "Engine Power Required When Using a Tractor with a Technology Module." Agricultural Machinery and Technologies 15, no. 2 (2021): 33–40. http://dx.doi.org/10.22314/2073-7599-2021-15-2-33-40.
Full textAbstract:
A shortage of class 2 and class 3 tractors was observed in peasant farms. As a solution to this problem, it was proposed to develop a technological module that would increase the versatility of class 1.4 tractors by transferring them to a higher traction class. (Research purpose) The authors aimed to substantiate the nominal operating power of the engine for a tractor with a technological module. (Materials and methods) To calculate the required power, the authors proposed a method that takes into account the design features of the modular construction of a machine-tractor unit. (Results and discussion) The authors showed that for a modular power unit with a 6K6 wheel arrangement, it is necessary to consider a number of additional factors having an impact on the accuracy of the calculation: firstly, the tractor’s traction and coupling properties depend on the number of driving axles; secondly, the wheel slippage along individual axes is not the same and occurs due to a constructively conditioned kinematic discrepancy in their drive; thirdly, the three-axle transmission efficiency can be determined only as a total indicator of three transmission branches, that is, to drive the tractor front and rear wheels and, separately, to drive the wheels of the technological module. The authors compared the required engine power when using a tractor with ballast and that with a technological module. (Conclusions) It was determined that in order to achieve the maximum traction force of adhesion on the hook when moving to the next higher traction class, it is necessary that the tractor, that the technological module is joint to, has the energy saturation of 2.00-2.41 kilowatts per kilonewton, which corresponds to traction and energy concept tractors whose engine power cannot be realized through traction. It was found that the power saturation of the tractor with the technological module will be equal to 1.59-1.65 kilowatts per kilonewton, which corresponds to the tractor of the traction concept and allows realizing the built-in engine power through traction.
44
Nejadafshar, Alireza, Mahmoud Ahmadi Sharif, Farzad Asayesh, and Alireza Rousta. "Providing a Comprehensive Model for Customer Knowledge Management in Industrial Companies Affiliated with the Mostazafan Foundation." Business, Marketing, and Finance Open 2, no. 1 (2025): 51–61. https://doi.org/10.61838/bmfopen.2.1.6.
Full textAbstract:
Customer knowledge offers a dual-value proposition. On one hand, it helps companies better meet customer needs by identifying their requirements and desires, thereby creating value for customers. On the other hand, by identifying needs, behaviors, consumption patterns, and demands, it aids organizations in the development and improvement of products and services tailored to customer needs, thereby increasing profitability and customer loyalty. Therefore, the aim of this study is to present a model for customer knowledge management in industrial companies affiliated with the Mostazafan Foundation of the Islamic Revolution. This research is applied in purpose and descriptive-analytical in nature. The research method is qualitative. The statistical population consists of academic experts and managers of industrial companies affiliated with the Mostazafan Foundation, from which 12 individuals were selected using snowball sampling and theoretical saturation. The data collection tool for the qualitative section was semi-structured interviews based on theoretical foundations. The data analysis method used was grounded theory. The results of this section were explained in the form of 4 main categories and 19 sub-categories. The results indicated that the identified factors related to the dimensions, drivers, and outcomes of the customer knowledge management model in industrial companies affiliated with the Mostazafan Foundation in this study include: evaluating the current state of knowledge within the organization, collecting, documenting, and transferring customer knowledge, establishing effective communication with customers, and fully understanding their needs and interests, focusing on the process of creating knowledge about customers, conducting psychological assessments of customers, and analyzing customer behavior, feedback strategies from customers (through surveys, comments, feedback, and interviews with customers), focusing on the company’s knowledge-based products, reviewing the history of current customers (previous purchasing behaviors), applying creative ideas regarding products and services, emphasizing the training of knowledge transfer and management methods, strengthening technological infrastructure, collaborating with customers in creating shared value, comparing the sales of new products with competitor products, measuring the achievement of set goals, increasing efficiency in customer service and customer orientation, digital self-service tailored to the customer (in the field of customer support), intelligently transferring customer requests to relevant experts, creating the greatest value from knowledge and knowledge management at a strategic level, and improving the quality and speed of decision-making and customer service.
45
Cazzola, M., HA Huebers, MH Sayers, AP MacPhail, M. Eng, and CA Finch. "Transferrin saturation, plasma iron turnover, and transferrin uptake in normal humans." Blood 66, no. 4 (1985): 935–39. http://dx.doi.org/10.1182/blood.v66.4.935.935.
Full textAbstract:
Abstract The relationship between plasma iron, transferrin saturation, and plasma iron turnover was studied in 53 normal subjects whose transferrin saturation varied between 17% and 57%, in 25 normal subjects whose transferrin saturation was increased by iron infusion to between 67% and 100%, and in five subjects with early untreated idiopathic hemochromatosis whose transferrin saturation was continually elevated to between 61% and 86%. The plasma iron turnover of all of these subjects ranged from 0.45 to 1.22 mg/dL whole blood/d. The mean values for the above-mentioned three groups were 0.71 +/- 0.17, 1.01 +/- 0.11, and 1.01 +/- 0.13 mg/dL whole blood/d, respectively. Most of this variation, estimated at 72% by regression analysis, was due to a direct relationship between transferrin saturation and plasma iron turnover. This effect was attributed to a competitive advantage of diferric over monoferric transferrin in delivering iron to tissues. This was confirmed by the demonstration of a more rapid clearance of diferric as compared to monoferric transferrin in an additional group of eight normal subjects. Calculations were made of the amount of transferrin reacting with membrane receptors per unit time. Allowance was made for the noncellular (extravascular) exchange and for the 4.2:1 preference of diferric over monoferric transferrin demonstrated in vitro. The amount of iron-bearing transferrin leaving the plasma to bind to tissue receptors for 53 subjects with a transferrin saturation between 17% and 57% was 71 +/- 13; for 25 subjects with a saturation from 67% to 100%, 72 +/- 12; and for five subjects with early idiopathic hemochromatosis, 82 +/- 11 mumol/L whole blood/d. There were no significant differences among these groups. These studies indicate that while the number of iron atoms delivered to the tissues increases with increasing plasma iron and transferrin saturation, the number of iron-bearing transferrin molecules that leave the plasma per unit time to bind to tissue receptors is relatively constant and within the limits studied, independent of transferrin saturation.
46
Cazzola, M., HA Huebers, MH Sayers, AP MacPhail, M. Eng, and CA Finch. "Transferrin saturation, plasma iron turnover, and transferrin uptake in normal humans." Blood 66, no. 4 (1985): 935–39. http://dx.doi.org/10.1182/blood.v66.4.935.bloodjournal664935.
Full textAbstract:
The relationship between plasma iron, transferrin saturation, and plasma iron turnover was studied in 53 normal subjects whose transferrin saturation varied between 17% and 57%, in 25 normal subjects whose transferrin saturation was increased by iron infusion to between 67% and 100%, and in five subjects with early untreated idiopathic hemochromatosis whose transferrin saturation was continually elevated to between 61% and 86%. The plasma iron turnover of all of these subjects ranged from 0.45 to 1.22 mg/dL whole blood/d. The mean values for the above-mentioned three groups were 0.71 +/- 0.17, 1.01 +/- 0.11, and 1.01 +/- 0.13 mg/dL whole blood/d, respectively. Most of this variation, estimated at 72% by regression analysis, was due to a direct relationship between transferrin saturation and plasma iron turnover. This effect was attributed to a competitive advantage of diferric over monoferric transferrin in delivering iron to tissues. This was confirmed by the demonstration of a more rapid clearance of diferric as compared to monoferric transferrin in an additional group of eight normal subjects. Calculations were made of the amount of transferrin reacting with membrane receptors per unit time. Allowance was made for the noncellular (extravascular) exchange and for the 4.2:1 preference of diferric over monoferric transferrin demonstrated in vitro. The amount of iron-bearing transferrin leaving the plasma to bind to tissue receptors for 53 subjects with a transferrin saturation between 17% and 57% was 71 +/- 13; for 25 subjects with a saturation from 67% to 100%, 72 +/- 12; and for five subjects with early idiopathic hemochromatosis, 82 +/- 11 mumol/L whole blood/d. There were no significant differences among these groups. These studies indicate that while the number of iron atoms delivered to the tissues increases with increasing plasma iron and transferrin saturation, the number of iron-bearing transferrin molecules that leave the plasma per unit time to bind to tissue receptors is relatively constant and within the limits studied, independent of transferrin saturation.
47
Clark, Margaret, Joyce Royal, and Ruth Seeler. "Interaction of Iron Deficiency and Lead and the Hematologic Findings in Children With Severe Lead Poisoning." Pediatrics 81, no. 2 (1988): 247–54. http://dx.doi.org/10.1542/peds.81.2.247.
Full textAbstract:
Microcytic anemia, long considered an effect of lead poisoning, may in fact result from coexisting iron deficiency. In this study, how RBC size, hemoglobin, and zinc protoporphyrin vary as a function of iron status in a group of children with high lead levels was examined. Charts of all children (N = 51) admitted to Cook County Hospital for treatment of lead poisoning in 1981 to 1983 were reviewed for data on age, blood lead level, hemoglobin concentration, MCV, transferrin saturation and zinc protoporphyrin level. The mean lead level was 86 µg/dL and the range was 63 to 190 µg/dL. Children with transferrin saturation values less than 7% had a mean MCV of 56 pµL, hemoglobin of 8.9 g/dL, and zinc protoporphyrin of 693 µg/dL; for those with saturations of 7% to 16%, the values were 61 µL, 10.1 g/dL, and 581 µg/dL, respectively; the children with saturations greater than 16% had normal mean MCVs and hemoglobin concentrations (74 µL and 11.4 g/dL) and a mean zinc protoporphyrin value of 240 µg/dL (P &lt; .0005). Multiple linear regression was used to correct for effect of age, and transferrin saturation remained the most important predictor of MCV, hemoglobin, and zinc protoporphyrin levels; the addition of lead did not improve the models. Results of this study suggest that iron deficiency is strongly associated with some of the observed toxicities of lead. Also, lead poisoning can exist without producing microcytosis or anemia, and zinc protoporphyrin concentration may not be a sensitive indicator of lead level in the absence of iron deficiency.
48
Mainous, A. G. "Elevated Serum Transferrin Saturation and Mortality." Annals of Family Medicine 2, no. 2 (2004): 133–38. http://dx.doi.org/10.1370/afm.25.
Full text
49
Jacobs, E. M. G., F. L. A. Willekens, and R. A. de Vries. "Exploring results of transferrin saturation measurements." European Journal of Gastroenterology & Hepatology 11, no. 12 (1999): A73. http://dx.doi.org/10.1097/00042737-199912000-00194.
Full text
50
Herrinton, Lisa J., Gary D. Friedman, David Baer, and Joseph V. Selby. "Transferrin Saturation and Risk of Cancer." American Journal of Epidemiology 142, no. 7 (1995): 692–98. http://dx.doi.org/10.1093/oxfordjournals.aje.a117698.
Full text