Articoli di riviste: "519.2+219.688"

1

Dong, Quanxiao, Keyu Chen, Xiaodong Jin, Shibing Sun, Yingliang Tian, Feng Wang, Peng Liu e Mingshu Yang. "Investigation of Flame Retardant Flexible Polyurethane Foams Containing DOPO Immobilized Titanium Dioxide Nanoparticles". Polymers 11, n. 1 (5 gennaio 2019): 75. http://dx.doi.org/10.3390/polym11010075.

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In this work, a multi-functional nanoparticle (TiO2-KH570-DOPO) has been successfully synthesized through the attachment of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO)-methacryloxy propyl trimethoxyl silane on the surface of titanium dioxide (TiO2). Supercritical carbon dioxide was used as the solvent in order to increase the grafting level. The chemical structure of TiO2-KH570-DOPO was fully characterized using Fourier transform infrared spectra, thermogravimetric analysis and transmission electron microscopy. The modified TiO2 was incorporated into flexible polyurethane foam (FPUF). The fire performance of FPUF blends was evaluated using microscale combustion calorimetry. Peak heat release rate and total heat release values were reduced from 657.0 W/g and 28.9 kJ/g for neat FPUF sample to 519.2 W/g and 26.8 kJ/g of FPUF specimen containing 10 wt % of TiO2-KH570-DOPO. Analysis of thermal stability and the observation of char formation suggests that TiO2-KH570-DOPO is active in the condensed phase.

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Wang, Xuewen, e Barbara J. Nicklas. "Acute Impact of Moderate-Intensity and Vigorous-Intensity Exercise Bouts on Daily Physical Activity Energy Expenditure in Postmenopausal Women". Journal of Obesity 2011 (2011): 1–5. http://dx.doi.org/10.1155/2011/342431.

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This study determined whether performing a single moderate- or vigorous-intensity exercise bout impacts daily physical activity energy expenditure (PAEE, by accelerometer). Overweight/obese postmenopausal women underwent a 5-month caloric restriction and moderate- (n=18) or vigorous-intensity (n=18) center-based aerobic exercise intervention. During the last month of intervention, in women performing moderate-intensity exercise, PAEE on days with exercise (577.7±219.7kcal⋅d−1) was higher (P=.011) than on days without exercise (450.7±140.5kcal⋅d−1); however, the difference (127.0±188.1kcal⋅d−1) was much lower than the energy expended during exercise. In women performing vigorous-intensity exercise, PAEE on days with exercise (450.6±153.6kcal⋅d−1) was lower (P=.047) than on days without exercise (519.2±127.4kcal⋅d−1). Thus, women expended more energy on physical activities outside of prescribed exercise on days they did NOT perform center-based exercise, especially if the prescribed exercise was of a higher intensity.

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Brevan, J. "Aircraft Gunfire Vibration: Standardization and Experience". Journal of the IEST 31, n. 4 (1 luglio 1988): 15–19. http://dx.doi.org/10.17764/jiet.1.31.4.t1n555207265542j.

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For much of the equipment mounted on a fighter aircraft, the vibration level during gunfire is high enough above vibration due to other situations, so that, in spite of its short duration, it dominates the vibration qualification specs. It is desirable to include a simple yet reliable gunfire vibration prediction technique in the appropriate environment standards, because the relevant measured data are seldom available in the early stages of development of a new aircraft. This article describes a study on gunfire vibration prediction performed during the buildup of the aeronautical application guide of the new French military environment standard, GAM EG 13B/Air 7306. The prediction technique of MIL-STD-810D (Method 519.3) is compared in detail with previous MIL-STD-810C (Method 519.2), and the underlying concepts are checked against various measured data. Comparisons are made with gunfire vibration measurements performed on a French fighter. The findings of this study were used to elaborate the GAM EG 13B/Air 7306 gunfire vibration prediction method presented here.

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Bilandzic, Nina, Marija Sedak, Maja Djokic, Djurdjica Bozic, Bozica Solomun-Kolanovic e Ivana Varenina. "Differences in macro- and microelement contents in milk and yoghurt". Archives of Biological Sciences 67, n. 4 (2015): 1391–97. http://dx.doi.org/10.2298/abs140312117b.

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The aim of this study was to determine the concentration of macroelements (Ca, Na, K, Mg) and essential elements (Zn, Fe, Se, Cu) in milk and yoghurt collected from the Croatian market. Inductively coupled plasma-optical emission spectrometry was used as an analytical technique. Mean concentrations measured in milk and yoghurt were (mg/kg): Ca 1406.9 and 1153.8, K 1995.5 and 1526.5, Na 608.3 and 519.2, Mg 136.4 and 108.0, Zn 3.92 and 3.48, Fe 0.332 and 0.231, Cu 0.005 and 0.124. Significantly higher concentrations of Ca, K, Na and Cu (p<0.01-p<0.001) were found in milk than in yoghurt. The element concentrations measured in milk, with the exception of higher K and Na levels, were in agreement with the literature data. Variations in the content of all elements in yoghurt were found in comparison to data from other countries. These results represent the first data on macro- and microelements from the Croatian market. The variations found in comparison to other countries suggest that unique processes are utilized in the production of yoghurt products.

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Dedy Pratama, Hendro Sudjono Yuwono, Rudi Supriyadi, Herry Herman, Fachreza Aryo Damara e Avicenna Akbar. "Antioxidant Properties of Curcumin and Its Impact on Arteriovenous Fistula Maturation in End-Stage Kidney Disease Patient with Diabetes Mellitus Type 2". International Journal of Research in Pharmaceutical Sciences 11, n. 4 (25 dicembre 2020): 7624–29. http://dx.doi.org/10.26452/ijrps.v11i4.4107.

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The risk of maturation failure in arteriovenous fistula (AVF) remains high. Curcumin poses antioxidant effects may enhance AVF maturation. This study evaluates the antioxidant effect of Curcumin on AVF maturation among type 2 diabetic patients (T2DM) with end-stage renal disease (ESRD). This was a single-blinded, randomized controlled trial conducted in three tertiary hospitals in Jakarta, Indonesia. Patients underwent the first hemodialysis. A total of 67 patients divided into groups of Curcumin, acetylsalicylic acid, and placebo. After 4 weeks, TAC level among the curcumin group was significantly higher compared to acetylsalicylic acid, and placebo groups 794.2(457.4±1473.7) µM vs. 519.2(247.7 ± 1027.7) µM and 794.2(457.4± 1473.7) µM vs. 542.5(281.91± 1054.64) µM, respectively (p<0.05). Also, TAC after 8 weeks was significantly higher among curcumin group compared to acetylsalicylic acid, and placebo groups (820.5(380.7± 1643.7) µM vs. 509.7(341.0± 981.91) µM and 820.5(380.7± 1643.7) µM vs. 497.7(324.7± 979.2) µM, respectively (p<0.001). The TAC level patients with mature AVF were also higher. A 2000 mg/day of curcumin increases antioxidant capacity after 4 and 8 weeks following AVF surgery among ESRD with T2DM.

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Nguyen, Van-Truc, Nguyen Duy Dat, Thi-Dieu-Hien Vo, Duy-Hieu Nguyen, Thanh-Binh Nguyen, Ly-Sy Phu Nguyen, Xuan Cuong Nguyen et al. "Characteristics and Risk Assessment of 16 Metals in Street Dust Collected from a Highway in a Densely Populated Metropolitan Area of Vietnam". Atmosphere 12, n. 12 (24 novembre 2021): 1548. http://dx.doi.org/10.3390/atmos12121548.

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The present study focused on investigating the contamination and risk assessment for 16 metals in street dust from Ha Noi highway, Ho Chi Minh City. The results indicated that the concentrations of metals (mg/kg) were found, in decreasing order, to be Ti (676.3 ± 155.4) > Zn (519.2 ± 318.9) > Mn (426.6 ±113.1) > Cu (144.7 ± 61.5) > Cr (81.4 ± 22.6) > Pb (52.2 ± 22.9) > V (35.5 ± 5.6) > Ni (30.9 ± 9.5) > Co (8.3 ± 1.2) > As (8.3 ± 2.5) > Sn (7.0 ± 3.6) > B (5.7 ± 0.9) > Mo (4.1 ± 1.7) > Sb (0.8 ± 0.3) > Cd (0.6 ± 0.2) > Se (0.4 ± 0.1). The geo-accumulation index (Igeo) showed moderate contamination levels for Pb, Cd, Cu, Sn, Mo, and Zn. The enrichment factor (EF) values revealed moderate levels for Cd, Cu, Mo, and Sn but moderate–severe levels for Zn. The pollution load index of the heavy metals was moderate. The potential ecological risk (207.43) showed a high potential. Notably, 40.7% and 33.5% of the ecological risks were contributed by Zn and Mn, respectively. These findings are expected to provide useful information to decision-makers about environmental quality control strategies.

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Dorji, Jigme, Dhendup e Iona M. MacLeod. "Phenotypic and genetic parameters for milk yield in traditional Nublang cattle (Bos indicus) of Bhutan". Animal Genetic Resources/Ressources génétiques animales/Recursos genéticos animales 57 (20 luglio 2015): 25–30. http://dx.doi.org/10.1017/s2078633615000223.

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SummaryThe Nublang is a unique dual-purpose breed ofBos indicuscattle found in Bhutan. They have been crossed with Mithun (Bos frontalis) andBos taurusbreeds in an effort to improve milk production leading to a decline in the population of purebred Nublang. An alternative to crossbreeding would be the genetic improvement of milk yield within purebred Nublang, thus allowing conservation and sustainable utilization of the pure breed. It is important to measure the genetic variability (heritability) of milk yield to assess the potential for genetic improvement within Nublang. Therefore this study estimated phenotypic and genetic parameters of milk yield using 2 052 test day milk yields from 66 cows recorded from 1997 to 2013 in the National Nublang Farm, Tashiyangphu. The average daily milk yield (DMY) was 2.12 ± 0.7 litres (N 2 052, range: 0.3–5.0 L, CV: 34 percent). Parity, month in milk and year all had a significant effect on DMY (P< 0.05). The average lactation milk yield (LMY) was 519.2 ± 151 L (N: 261, range: 115–881.7, CV: 29.1 percent) and average lactation length was 239 days. LMY was significantly influenced by parity (P< 0.05) and season of calving. The heritability of DMY and LMY was 0.22 ± 0.16 and 0.13 ± 0.20, respectively. The repeatability estimates were 0.45 ± 0.05 and 0.49 ± 0.08 for DMY and LMY, respectively. Overall the heritability and repeatability estimates of milk yields indicate potential for genetic improvement of milk yield in Nublang cattle through selection. However, it is recommended that a larger dataset is generated to enable more precise estimates of genetic parameters.

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Collins, J. Ian. "Discussion of “ Groupiness Factor and Wave Height Distribution ” by Hajime Mase (January, 1989, Vol. 115 No. 1)". Journal of Waterway, Port, Coastal, and Ocean Engineering 116, n. 4 (luglio 1990): 519–21. http://dx.doi.org/10.1061/(asce)0733-950x(1990)116:4(519.2).

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Stavrou, Vasileios T., Konstantinos N. Tourlakopoulos, George D. Vavougios, Eirini Papayianni, Katerina Kiribesi, Stavros Maggoutas, Konstantinos Nikolaidis et al. "Eight Weeks Unsupervised Pulmonary Rehabilitation in Previously Hospitalized of SARS-CoV-2 Infection". Journal of Personalized Medicine 11, n. 8 (18 agosto 2021): 806. http://dx.doi.org/10.3390/jpm11080806.

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The aim of our study was to determine the impact of unsupervised Pulmonary Rehabilitation (uns-PR) on patients recovering from COVID-19, and determine its anthropometric, biological, demographic and fitness correlates. All patients (n = 20, age: 64.1 ± 9.9 years, 75% male) participated in unsupervised Pulmonary Rehabilitation program for eight weeks. We recorded anthropometric characteristics, pulmonary function parameters, while we performed 6 min walk test (6 MWT) and blood sampling for oxidative stress measurement before and after uns-PR. We observed differences before and after uns-PR during 6 MWT in hemodynamic parameters [systolic blood pressure in resting (138.7 ± 16.3 vs. 128.8 ± 8.6 mmHg, p = 0.005) and end of test (159.8 ± 13.5 vs. 152.0 ± 12.2 mmHg, p = 0.025), heart rate (5th min: 111.6 ± 16.9 vs. 105.4 ± 15.9 bpm, p = 0.049 and 6th min: 112.5 ± 18.3 vs. 106.9 ± 17.9 bpm, p = 0.039)], in oxygen saturation (4th min: 94.6 ± 2.9 vs. 95.8 ± 3.2%, p = 0.013 and 1st min of recovery: 97.8 ± 0.9 vs. 97.3 ± 0.9%), in dyspnea at the end of 6 MWT (1.3 ± 1.5 vs. 0.6 ± 0.9 score, p = 0.005), in distance (433.8 ± 102.2 vs. 519.2 ± 95.4 m, p < 0.001), in estimated O2 uptake (14.9 ± 2.4 vs. 16.9 ± 2.2 mL/min/kg, p < 0.001) in 30 s sit to stand (11.4 ± 3.2 vs. 14.1 ± 2.7 repetitions, p < 0.001)] Moreover, in plasma antioxidant capacity (2528.3 ± 303.2 vs. 2864.7 ± 574.8 U.cor., p = 0.027), in body composition parameters [body fat (32.2 ± 9.4 vs. 29.5 ± 8.2%, p = 0.003), visceral fat (14.0 ± 4.4 vs. 13.3 ± 4.2 score, p = 0.021), neck circumference (39.9 ± 3.4 vs. 37.8 ± 4.2 cm, p = 0.006) and muscle mass (30.1 ± 4.6 vs. 34.6 ± 7.4 kg, p = 0.030)] and sleep quality (6.7 ± 3.9 vs. 5.6 ± 3.3 score, p = 0.036) we observed differences before and after uns-PR. Our findings support the implementation of unsupervised pulmonary rehabilitation programs in patients following COVID-19 recovery, targeting the improvement of many aspects of long COVID-19 syndrome.

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Hernández-Fernández, Francisco, Hernán Sandoval Valencia, Rosa Angélica Barbella-Aponte, Rosa Collado-Jiménez, Óscar Ayo-Martín, Cristina Barrena, Juan David Molina-Nuevo et al. "Cerebrovascular disease in patients with COVID-19: neuroimaging, histological and clinical description". Brain 143, n. 10 (9 luglio 2020): 3089–103. http://dx.doi.org/10.1093/brain/awaa239.

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Abstract Since the appearance of the first case of coronavirus disease 2019 (COVID-19) a pandemic has emerged affecting millions of individuals worldwide. Although the main clinical manifestations are respiratory, an increase in neurological conditions, specifically acute cerebrovascular disease, has been detected. We present cerebrovascular disease case incidence in hospitalized patients with SARS-CoV-2 infection. Patients were confirmed by microbiological/serological testing, or on chest CT semiology. Available data on co-morbidity, laboratory parameters, treatment administered, neuroimaging, neuropathological studies and clinical evolution during hospitalization, measured by the modified Rankin scale, were analysed. A bivariate study was also designed to identify differences between ischaemic and haemorrhagic subtypes. A statistical model of binary logistic regression and sensitivity analysis was designed to study the influence of independent variables over prognosis. In our centre, there were 1683 admissions of patients with COVID-19 over 50 days, of which 23 (1.4%) developed cerebrovascular disease. Within this group of patients, cerebral and chest CT scans were performed in all cases, and MRI in six (26.1%). Histological samples were obtained in 6/23 cases (two brain biopsies, and four arterial thrombi). Seventeen patients were classified as cerebral ischaemia (73.9%, with two arterial dissections), five as intracerebral haemorrhage (21.7%), and one leukoencephalopathy of posterior reversible encephalopathy type. Haemorrhagic patients had higher ferritin levels at the time of stroke (1554.3 versus 519.2, P = 0.004). Ischaemic strokes were unexpectedly frequent in the vertebrobasilar territory (6/17, 35.3%). In the haemorrhagic group, a characteristic radiological pattern was identified showing subarachnoid haemorrhage, parieto-occipital leukoencephalopathy, microbleeds and single or multiple focal haematomas. Brain biopsies performed showed signs of thrombotic microangiopathy and endothelial injury, with no evidence of vasculitis or necrotizing encephalitis. The functional prognosis during the hospital period was unfavourable in 73.9% (17/23 modified Rankin scale 4–6), and age was the main predictive variable (odds ratio = 1.5; 95% confidence interval 1.012–2.225; P = 0.043). Our series shows cerebrovascular disease incidence of 1.4% in patients with COVID-19 with high morbidity and mortality. We describe pathological and radiological data consistent with thrombotic microangiopathy caused by endotheliopathy with a haemorrhagic predisposition.

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Mohammed, Hamdoon A., Mohsen S. Al-Omar, Riaz A. Khan, Salman A. A. Mohammed, Kamal A. Qureshi, Manal M. Abbas, Osamah Al Rugaie, Essam Abd-Elmoniem, Adel M. Ahmad e Yasser I. Kandil. "Chemical Profile, Antioxidant, Antimicrobial, and Anticancer Activities of the Water-Ethanol Extract of Pulicaria undulata Growing in the Oasis of Central Saudi Arabian Desert". Plants 10, n. 9 (31 agosto 2021): 1811. http://dx.doi.org/10.3390/plants10091811.

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Pulicaria undulata (L.) C. A. Mey has multiple uses as part of the traditional medicament, and several biological activities of the plant have been corroborated in the scientific literature. The current work evaluates the phytochemical constituents and biological properties of the water-ethanol extract of the P. undulata growing in Qassim, the central arid regions of the Kingdom of Saudi Arabia. Qualitative UPLC-ESIQ-TOF analysis identified 27 compounds belonging to the phenolics, flavonoids, triterpenes, coumarins, and of fatty acids chemical classes. The quantitative analysis exhibited 33.3 mg/g GAE (Gallic Acid Equivalents), and 10.8 mg/g QE (Quercetin Equivalents) of the phenolics and flavonoids in the plant’s concentrated (to dryness) water-ethanol extract. The trace elements analysis of the plant’s dry powder established the presence of copper (20.13 µg/kg), and zinc (68.2 µg/kg) in the higher levels of occurrences. In terms of the antioxidant potential of the plant’s extract, the ferric-reducing, and free-radicals scavenging activities were recorded at 47.11 mg/g, and 19.13 mg/g equivalents of the concentrated to dryness water-ethanol extract of the plant. The water-ethanol extract of P. undulata also exhibited antimicrobial activity against the tested Gram-positive bacteria, while no activity was observed against the tested Gram-negative bacteria, or the fungi. The MIC (minimum inhibitory concentration) values were in the range of 49 to 1563 µg/mL, whereas the MBC (minimum bactericidal concentration) values ranged from 49 to 3125 µg/mL, against the tested Gram-positive bacteria. The P. undulata water-ethanol extract also exhibited potent cytotoxic effects with the IC50 value at 519.2 µg/mL against the MCF-7 breast cancer cell-lines, followed by the anticancer activity of erythroleukemic cell-lines, K562 at 1212 µg/mL, and pancreatic cell-lines, PANC-1, at 1535 µg/mL, as compared to the normal fibroblast cells (4048 µg/mL). The Annexin-V assay demonstrated that, as the P. undulata extract’s dose increased from IC50 to twice of the IC50, the percentage of the necrosis was found to be increased in the late apoptosis stage of the cancer cells. These data confirmed the P. undulata extract’s ability to inhibit several human cancer cell lines’ growth in comparison to other local halophytes. The antimicrobial activity of the plant was also confirmed.

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Boles, Jeffrey Oakley, Kathleen M. Broderick e Molly Broderick. "Mass Spectral Analysis of Mutant and Wild‐Type Selenomethionyl‐Dihydrofolate Reductase". FASEB Journal 24, S1 (aprile 2010). http://dx.doi.org/10.1096/fasebj.24.1_supplement.519.2.

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Mussell, Jason C., Hugo St. Hilaire e Ruston Sanchez. "Foraminal stenosis and anomalous venous drainage in complex craniosynostosis". FASEB Journal 27, S1 (aprile 2013). http://dx.doi.org/10.1096/fasebj.27.1_supplement.519.2.

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Bollag, Wendy B., Ding Xie e John Edwards. "Effects of Different Phosphatidylglycerol Species on the Proliferation of Primary Mouse Keratinocytes". FASEB Journal 23, S1 (aprile 2009). http://dx.doi.org/10.1096/fasebj.23.1_supplement.519.2.

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Dhanda, Arandeep S., A. Wayne Vogl, Carol A. Otey, Moriah R. Beck e Julian A. Guttman. "Palladin Functionally Replaces the Arp2/3 Complex and Organizes Actin‐Rich Structures Generated during Listeria monocytogenes Infections". FASEB Journal 32, S1 (aprile 2018). http://dx.doi.org/10.1096/fasebj.2018.32.1_supplement.519.2.

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Miller, Cynthia Jayne. "The use of novel Camtasia videos to improve performance of at‐risk students". FASEB Journal 26, S1 (aprile 2012). http://dx.doi.org/10.1096/fasebj.26.1_supplement.519.2.

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Suarez‐Martinez, Ariana Diandra, Jack Wang e Walter Lee Murfee. "Investigating Pericyte Dynamics during Angiogenesis in the Mouse Mesometrium Culture Model". FASEB Journal 33, S1 (aprile 2019). http://dx.doi.org/10.1096/fasebj.2019.33.1_supplement.519.2.

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TANVEER, A., M. E. SAFDAR, N. FAROOQ, M. I. SUDOZAI, M. A. NADEEM e T. ABBAS. "Exploring the Herbicidal Potential of Achyranthes aspera Against Some Weeds". Planta Daninha 37 (2019). http://dx.doi.org/10.1590/s0100-83582019370100066.

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ABSTRACT: The phytotoxic composition of Achyranthes aspera was identified through HPLC, and its herbicidal potential was investigated against two narrow leaf weeds viz., Phalaris minor Retz. and Avena fatua L.; and four broad leaf weeds viz. Lathyrus aphaca L., Vicia sativa L., Convolvolus arvensis L. and Asphodelus tenuifolius L. through bioassays. Weed seeds were grown in the aqueous extracts of various plant parts (roots, leaf, stem, fruit and whole plant) of A. aspera at 5% (w/v) concentration. The extracts of all plant parts caused significant reductions with differential degree in germination percentage and mean germination time. Phalaris minor, A. fatua, L. aphaca, V. sativa and A. tenuifolius completely failed to germinate whereas C. arvensis showed the lowest GP (20%) in response to 5% fruit extract of A. aspera. Inhibition of seed germination of all weeds was higher with the fruit extract than with the root, stem, leaf and whole plant extracts of A. aspera. Seed germination of all narrow leaf weeds was completely inhibited at the 5% fruit extract of A. aspera. The highest phytotoxic inhibitory effect of A. aspera fruit extract was proved to be due to the presence of gallic acid (88.4 mg kg-1), caffeic acid (519.2 mg g-1) and m-coumaric acid (51.4 mg kg-1) as assessed by their HPLC analyses. The study, therefore, showed that A. aspera exerts an inhibitory effect on germination of weeds and can be further explored as a pre- or post-emergence herbicide to provide natural alternative to chemical herbicides in the future.

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