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Journal articles on the topic 'Ca/K Plasma Ratio'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Fajda, Oleksandra I., Oleksandr V. Drach, Liliya G. Barylyak, and Walery Zukow. "Relationships between Ca/K plasma ratio and parameters of heart rate variability at patients with diathesis urica." Journal of Education, Health and Sport 6, no. 1 (2016): 295–301. https://doi.org/10.5281/zenodo.45359.

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<strong>Fajda Oleksandra I., Drach Oleksandr V., Barylyak Liliya G., </strong><strong>Zukow W</strong><strong>alery. Relationships between Ca/K plasma ratio and parameters of heart rate variability at patients with diathesis urica. </strong><strong>Journal of Education, Health and Sport. </strong><strong>2016;6(1):295-301. eISSN 2391-8306. DOI</strong> <strong>http://dx.doi.org/10.5281/zenodo.45359</strong> <strong>http://ojs.ukw.edu.pl/index.php/johs/article/view/3368</strong> <strong>https://pbn.nauka.gov.pl/works/710817</strong>       <strong>The journal has had 7 points in M

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JIANG, H. C., W. L. ZHANG, Z. C. CHEN, W. X. ZHANG та B. PENG. "EFFECTS OF OXYGEN CONTENT ON THE TRANSPORT PROPERTIES OF La0.7Ca0.3MnO3-δ THIN FILMS". Surface Review and Letters 14, № 05 (2007): 899–902. http://dx.doi.org/10.1142/s0218625x0701041x.

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We report the effects of oxygen content on the transport properties of La 0.7 Ca 0.3 MnO 3-δ thin films grown epitaxially on LaAlO 3 (001) substrates by RF magnetron sputtering. The as-deposited thin films were annealed and treated by oxygen plasma to improve the oxygen content. We observe that the La 0.7 Ca 0.3 MnO 3-δ films annealed at 850°C is highly oriented growth on (001) LAO substrate. However, the XRD patterns of the samples annealed at lower than 850°C show no distinct diffraction peaks. This evidence indicates that the samples annealed at lower than 850°C are still amorphous or nanoc

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Mourad, R. S. "Blood Biochemical Components and Progesterone Hormone on Day of Estrus in Crossbred Cattle in Egypt." Jurnal Ilmu Ternak dan Veteriner 23, no. 3 (2018): 103. http://dx.doi.org/10.14334/jitv.v23i3.1855.

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Deficiencies or excess minerals such as P, Cu, and Zn are associated with subnormal fertility and anoestrus conditions in cows. This study was conducted in a veterinary unit in Menufiya, Egypt. Eighteen head of crossbred cows were randomly selected at random at estrus time (estrus group) and as a control 14 head of crossbred cows were selected from newly-calving dams at about 6-12 hours after calving (control group). The aim of this study was to use the components of biochemistry and progesterone hormone on estrus day of crossbreeding cattle in Egypt. The information from this study will be us

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Liu, Shanke, Cheng Han, and Jianming Liu. "Study of K-Feldspar and Lime Hydrothermal Reaction: Phase and Mechanism with Reaction Temperature and Increasing Ca/Si Ratio." Minerals 9, no. 1 (2019): 46. http://dx.doi.org/10.3390/min9010046.

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To elucidate the physicochemical properties of the artificial silicate composite material, K-feldspar and lime were reacted in mild hydrothermal conditions (different reaction temperatures and various K-feldspar/lime ratios). Formed phases were investigated using various techniques, such as X-ray powder diffraction, the Rietveld method, scanning electron microscopy (SEM), and inductively coupled plasma-optical emission spectrometry. The analysis revealed that tobermorite, grossular (hydrogarnet), alpha-dicalcium silicate hydrate (α-C2SH), amorphous calcium silicate hydrate, potassium carbonate

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Xiaodi, Pi, Li Yeqing, Xie Xiting, and Xu Hongyong. "Correlation Analysis of Mineral Element Content and Sensory Quality of National Geographical Sign Product--Olecranon Peaches in Lianping." E3S Web of Conferences 251 (2021): 02035. http://dx.doi.org/10.1051/e3sconf/202125102035.

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Microwave digestion-inductively coupled plasma astigmatism (ICP-AES) was used to analyze the contents of mineral elements (including K, P, Mg, Ca, Na, Fe, Cu, Mn, B, Zn, Se, Li) in 54 Olecranon Peaches collected from Shangping town, Lianping County. The obtained data was analyzed by Correlation analysis (CA), combined with fruit reducing sugar (RS%), sugar-acid ratio (S/A) and sensory scores. The results showed that in the tested samples, it had a significant positive correlation between S/A sugar-acid ratio and sensory evaluation. S/A was negatively correlated with P contents. The P contents

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Fisher, L. J., N. Dinn, R. M. Tait, and J. A. Shelford. "Effect of level of dietary potassium on the absorption and excretion of calcium and magnesium by lactating cows." Canadian Journal of Animal Science 74, no. 3 (1994): 503–9. http://dx.doi.org/10.4141/cjas94-071.

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This study was undertaken with the objective of providing more basic information on the absorption and excretion of calcium (Ca) and magnesium (Mg) by lactating cows when high levels of potassium (K) are fed. Employing potassium carbonate as the source of supplemental K, total mixed rations were formulated to contain 1.6 (low), 3.1 (medium) and 4.6% (high) K. The three rations were fed to 15 Holstein cows in mid-lactation in a 3 × 3 Latin square experiment replicated five times. The experimental periods were 21 d in length. Blood, rumen and milk samples were obtained during the 2nd and 3rd wk

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Stojanovic, Branislav, Zdenka Stojanovic, Sonja Marjanovic, et al. "Canned meat products for members of the Serbian armed forces: Na, K, Ca, and Mg content and health risks/benefits." Journal of Agricultural Sciences, Belgrade 67, no. 4 (2022): 415–31. http://dx.doi.org/10.2298/jas2204415s.

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Macroelements such as Na, K, Ca, and Mg play a significant physiological role, and their inadequate intake has been linked to severe diseases, such as high blood pressure. Data on risk assessment for human health in Serbia, from the intake of these macroelements through the consumption of canned food, are minimal. Therefore, the content of Na, K, Ca, and Mg in five types of canned meat that members of the Serbian Armed Forces regularly use was examined. Macroelements were determined by inductively coupled plasma mass spectrometry in cans of beef goulash, pork ragout, spam, liver pate, and meat

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HOSHIKAWA, KIYOFUSA, ITSURO TAMANOI, AKEMI NAKAMURA, MUTSUMI KACHI, KUNIO OOHASHI, and SHINJI MATSUMOTO. "POSSIBLE CHARACTERIZATION OF MOUSE STRAINS BY PLASMA ANALYSIS WITH PIXE." International Journal of PIXE 04, no. 02n03 (1994): 97–105. http://dx.doi.org/10.1142/s0129083594000131.

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We investigated the elemental composition of mouse blood plasma with PIXE method. We measured quantitative X-ray yields of S, Cl, K and Ca by changing sample volume from 1.25 to 15.0 µl to find the most profitable volume of plasma for elemental analysis. Linear relationships were confirmed between the applied volume (1.25~5.0 µl) and the counts of X-ray from each element. Some elements showed, however, saturated curves over 5.0 µl. Five μl was enough to analyze some important elements of blood plasma and used in the present analysis. We propose 5.0 µl as a standard amount of sample in plasma a

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Tajchman, Katarzyna, Aleksandra Ukalska-Jaruga, Francisco Ceacero, Monika Pecio, and Żaneta Steiner-Bogdaszewska. "Concentration of Macroelements and Trace Elements in Farmed Fallow Deer Antlers Depending on Age." Animals 12, no. 23 (2022): 3409. http://dx.doi.org/10.3390/ani12233409.

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The mineral content of the antlers reflects the nutritional status and specific stage of bone growth in cervid males. Therefore, this research aimed to analyze the concentration of Ca, P, Mg, K, Na, Li, V, Cr, Mn, Co, Cu, Zn, Se and Mo in three characteristic antler positions selected based on the observation of fights between males. These were compared between farmed fallow deer (Dama dama) of different ages. The mineral compositions of tissues were analyzed using inductively coupled plasma mass spectrometry. The highest mean concentrations of macroelements (except K) were recorded in the you

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Waghmode, Sonali, Pamita Agarwal, Savita Hadakar, Nirma Bharati, Namrata Gaonkar, and Hitendra Ramesh Jain. "Comparative Study on Remineralization and Fluoride Release with Ercr: Ysgg Laser and Non-Thermal Atmospheric Pressure Plasma." Journal of Pharmacy and Bioallied Sciences 17, Suppl 2 (2025): S1147—S1148. https://doi.org/10.4103/jpbs.jpbs_1403_24.

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ABSTRACT Background: Re-mineralizing potential (RMP) involves diffusion of calcium and phosphate (Ca and K) ions through pores of the carious surface and all F varnish release F but not at the same constant rate. Aim: To investigate and compare RMP and F release using 3 F varnish with their subgroups. Material and Method: In total, 135 samples were included which were assessed after 3 different varnish applications using 5% NaF with CPP-ACP, fTCP, and cXP, respectively, and treated with ErCr: YSGG, NTP, and control group respectively. Result: We found a significantly higher difference for anis

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Buthelezi, Lungelo Given, Sydney Mavengahama, Julia Sibiya, Charmaine Nontokozo Mchunu, and Nontuthuko Rosemary Ntuli. "Nutritional Variation on Sequentially Harvested Shoots and Fruits of Lagenaria siceraria Landraces." Plants 13, no. 11 (2024): 1475. http://dx.doi.org/10.3390/plants13111475.

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Lagenaria siceraria (Molina) Standley, a member of the Cucurbitaceae family, is valued for its medicinal and nutritive properties. The nutrient status of sequentially harvested shoots and fruits at various growth stages in L. siceraria has not been documented to date. This study aimed to compare the nutritional status of L. siceraria landrace shoots and fruits harvested at different maturity stages. Micronutrients, macronutrients, and proximate composition of shoots and fruits were determined using inductively coupled plasma–optical emission spectrometry (ICP-OES). Data were subjected to multi

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DORN, RONALD I., THOMAS A. CAHILL, ROBERT A. ELDRED, et al. "DATING ROCK VARNISHES BY THE CATION RATIO METHOD WITH PIXE, ICP, AND THE ELECTRON MICROPROBE." International Journal of PIXE 01, no. 02 (1990): 157–95. http://dx.doi.org/10.1142/s012908359000013x.

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The measurement of rock varnish cation-ratios [(K+Ca)/Ti] and barium is evaluated by analyzing the same varnish scrapings with PIXE, inductively coupled plasma, neutron activation and wavelength dispersive electron microprobe. Results among these different methods are generally similar for ratios, but absolute concentrations differ in part due to uncertainties associated with weighing small samples. Barium concentrations are typically less than 1 % by weight; higher concentrations can be found in varnishes with depressions eroded into the varnish by fungi and lichens, and later infilled with a

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UYLASER, Vildan, and GÃ¶kÃ§en YILDIZ. "Fatty Acid Profile and Mineral Content of Commercial Table Olives from Turkey." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 41, no. 2 (2013): 518. http://dx.doi.org/10.15835/nbha4129228.

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In this study, five different types of commercial table olive: Domat, Kalamata, Edremit (green), Edremit (black) and Gemlik, from Turkey, were investigated for the fatty acid composition and mineral content. Fatty acid analyses were performed by capillary gas chromatography. The fatty acid results showed that all table olives characterized by high level of were oleic acid (C18:1, 57.473-72.294%), linoleic acid (C18:2, 7.914-25.279%) and palmitic acid (C16:0, 9.735-16.441%). Moreover, in terms of the unsaturated oil content and a ratio of polyunsaturated fatty acids (PUFA) to saturated fatty ac

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MILENKOVIĆ, Katarina, Jelena MRMOŠANIN, Stefan PETROVIĆ, et al. "Elemental composition of Rosa L. fruits: Optimization and validation procedure of an ICP AES method." Notulae Botanicae Horti Agrobotanici Cluj-Napoca 52, no. 4 (2024): 13959. https://doi.org/10.15835/nbha52413959.

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This study aimed to determine element profile of the rose species originating from Serbia. With respect to that, 52 fruit samples of six wild Rosa L. species (R. agrestis Savi, R. canina L., R. corymbifera Borkh., R. dumalis Bechst, R. myriacantha DC., and R. spinosissima L.) were assayed for element contents, after the optimization and validation of the inductively coupled plasma atomic emission spectrometric (ICP AES) method. The analytical performance of axial and radial views was evaluated using the Mg(II)/Mg(I) line ratio. Robust plasma conditions were achieved at the radio frequency (RF)

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Noor, Zairin, Sutiman Bambang Sumitro, Mohammad Hidayat, Agus Hadian Rahim, Akhmad Sabarudin, and Tomonari Umemura. "Atomic Mineral Characteristics of Indonesian Osteoporosis by High-Resolution Inductively Coupled Plasma Mass Spectrometry." Scientific World Journal 2012 (2012): 1–6. http://dx.doi.org/10.1100/2012/372972.

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Clinical research indicates that negative calcium balance is associated with low bone mass, rapid bone loss, and high fracture rates. However, some studies revealed that not only calcium is involved in bone strengthening as risk factor of fracture osteoporosis. Thus, in this report, the difference of metallic and nonmetallic elements in osteoporosis and normal bones was studied by high-resolution inductively coupled plasma mass spectrometry (HR-ICP-MS). The influence of these elements on bone metabolic processes is also discussed. Inclusion criteria of bone samples consist of postmenopausal wo

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Mbissik, Aaron, Abdellatif Elghali, Muhammad Ouabid, Otmane Raji, Jean-Louis Bodinier, and Hicham El Messbahi. "Alkali-Hydrothermal Treatment of K-Rich Igneous Rocks for Their Direct Use as Potassic Fertilizers." Minerals 11, no. 2 (2021): 140. http://dx.doi.org/10.3390/min11020140.

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Due to the increasing demand for conventional sources of potassium (K) and their inaccessibility by African countries, K-rich igneous rocks are increasingly studied as potential alternative sources. In this study, six potassic igneous rocks (syenites and trachytes) from the Tamazeght, Jbel Boho, Ait Saoun, and El Glo’a regions (Morocco) were sampled and characterized. Then they were hydrothermally treated to enhance their K release for potential use as potassic fertilizers. The raw materials are mainly formed by microcline (up to 74%), orthoclase (20–68%), albite (36–57%), biotite-muscovite (1

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Karlen, Douglas L., Keith A. Kohler, David A. Laird, Richard L. Thompson, and Douglas D. Buhler. "Soil-test dynamics throughout a five-year ‘Thompson Farm’ rotation in Iowa." American Journal of Alternative Agriculture 17, no. 1 (2002): 9–17. https://doi.org/10.1079/ajaa20015.

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AbstractSoil-testing is an effective guide for achieving and maintaining an optimum supply of available plant nutrients, but there is little information on the multi-year soil-test changes for farms using long-term crop rotations, ridge-tillage and nutrients supplied by a mixture of organic amendments. Our objectives were to characterize yearly changes in surface soil-test parameters, including the stratification of P and K; compare soil-test methods (Mehlich III versus Bray P1 and 1 M NH4OAc exchangeable K); and evaluate soil-test interpretation strategies [sufficiency level versus basic cati

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Gonçalves, Jaylei Monteiro, Monique Dias Corrêa de Souza, Rafael Christian Chavez Rocha, Renata Jurema Medeiros, and Silvana do Couto Jacob. "Macro and trace elements in edible mushrooms, Shiitake, Shimeji and Cardoncello from Petrópolis, Rio de Janeiro, Brazil." Ciência Rural 44, no. 5 (2014): 943–49. http://dx.doi.org/10.1590/s0103-84782014000500029.

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The concentrations of twenty-five elements (Al, As, Ba, Bi, Ca, Cd, Cr, Cu, Fe, Ga, K, Li, Mg, Mn, Mo, Na, Ni, Pb, Rb , Sb, Se, Sn, Sr, V and Zn) were determined in three edible mushrooms, Shiitake (Lentinula edodes), Black Shimeji (Pleurotus ostreatusi) and Cardoncello (Pleurotus eryngyii) from Petrópolis, Rio de Janeiro, Brazil. Samples were collected along the year 2010 and their preparations were made after drying, milling, an acid pre-digestion and a decomposition procedure in a muffle furnace. The analytical techniques employed for the elements determination were Mass Spectrometry with I

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Medina, E., W. Fernandez, and F. Barboza. "Element uptake, accumulation, and resorption in leaves of mangrove species with different mechanisms of salt regulation." Web Ecology 15, no. 1 (2015): 3–13. http://dx.doi.org/10.5194/we-15-3-2015.

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Abstract. Element uptake from substrate and resorption capacity of nutrients before leaf shedding are frequently species-specific and difficult to determine in natural settings. We sampled populations of Rhizophora mangle (salt-excluding species) and Laguncularia racemosa (salt-secreting species) in a coastal lagoon in the upper section of the Maracaibo strait in western Venezuela to estimate accumulation and resorption of mineral elements. Leaves collected fortnightly during 4~months within the rainy season were stratified as young, adult, old, and senescent. We measured changes in concentrat

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Pawlak, Kornel, Łukasz Kruszyna, Marta Miecznikowska, and Marta Karaźniewicz-Łada. "Application of a Novel UPLC-MS/MS Method for Analysis of Rivaroxaban Concentrations in Dried Blood Spot and Plasma Samples Collected from Patients with Venous Thrombosis." Molecules 29, no. 17 (2024): 4140. http://dx.doi.org/10.3390/molecules29174140.

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Despite a higher safety profile compared to vitamin K antagonists, rivaroxaban therapy is still connected with multiple adverse effects, such as a high risk of bleeding. Thus, therapeutic drug monitoring (TDM) of rivaroxaban concentrations is suggested. An alternative to plasma samples can be dried blood spots (DBS), which minimize the cost of sample storage and transport. In this study, we developed a UPLC-MS/MS method for the analysis of rivaroxaban in DBS and plasma samples. Chromatographic separation was achieved on a Zorbax Eclipse Plus C18 column (2.1 × 100 mm; 3.5 µm, Agilent Technologi

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Guler, Cigdem, Meral Arslan Malkoc, Veli Alper Gorgen, Erhan Dilber, and Mehmet Bulbul. "Effects of Er:YAG Laser on Mineral Content of Sound Dentin in Primary Teeth." Scientific World Journal 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/578342.

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The aim of the present study was to evaluate the mineral content of sound dentin in primary teeth prepared using an Er:YAG laser at two different power settings. Thirty-six primary second molars were used in this study. Three dentin slabs were obtained from each tooth, and the slabs were randomly divided into three groups: Group A, control; Group B, Er:YAG laser at 3.5 W, 175 mJ, and 20 Hz, short pulse mode; and Group C, Er:YAG laser at 4 W, 200 mJ, and 20 Hz, medium-short pulse mode. One dentin slab per group was used to evaluate the dentinal morphology and surface roughness values using SEM

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Crook, Jennifer, Eunkyung Lee, Rui Xie, Opeyemi Bolajoko, and Victoria Loerzel. "Abstract 2171: Nutritional mediators of inflammation: A cause for increased surveillance." Cancer Research 84, no. 6_Supplement (2024): 2171. http://dx.doi.org/10.1158/1538-7445.am2024-2171.

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Abstract Background: Nutritional and inflammatory factors collected in routine cancer labs, neutrophil percentage to albumin ratio (NPAR), neutrophil lymphocyte ratio (NLR), monocyte lymphocyte ratio (MLR), and platelet lymphocyte ratio (PLR), have been shown feasible in identification of patients at risk of increased treatment complications, decreased cognition, anxiety and depression, and increased mortality. These have proven sensitive to multiple cancer types and stages, though little is known about causal pathways. The Vitamin/Mineral and Inflammatory Correlations To Understand Chronic St

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Efebera, Yvonne A., Basem M. William, Rebecca Tokarski, et al. "Tolerability of Bispecific Antibodies in Relapse/Refractory Multiple Myeloma (RRMM) Patients with Severe Renal Insufficiency: Case Series." Blood 144, Supplement 1 (2024): 7046. https://doi.org/10.1182/blood-2024-206178.

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Multiple Myeloma (MM) is the 2nd most common hematologic malignancy in the United States. While MM is not curable, novel therapies have significantly increased time to progression, decreasing morbidity and mortality. Teclistamab (Tec) and Talquetamab (Tal), both bispecific antibodies, have been approved for relapsed-refractory Multiple Myeloma (RRMM) (New Engl J Med. 2022; 2232-2244.; New Engl J Med. 2022;495-505.), but patients with creatinine clearance (Crcl) &lt; 40 mL/min were excluded. We present two patients with renal insufficiency who have had positive response to Tec and Tal witho

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Lu, Zhongying, Chengying Hai, Simin Yan, et al. "Chemistry Combining Elemental Profile, Stable Isotopic Ratios, and Chemometrics for Fine Classification of a Chinese Herb Licorice (Glycyrrhiza uralensis Fisch.) from 37 Producing Area." Journal of Analytical Methods in Chemistry 2022 (August 18, 2022): 1–9. http://dx.doi.org/10.1155/2022/8906305.

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A method based on elemental fingerprint, stable isotopic analysis and combined with chemometrics was proposed to trace the geographical origins of Licorice (Glycyrrhiza uralensis Fisch) from 37 producing areas. For elemental fingerprint, the levels of 15 elements, including Ca, Cu, Mg, Pb, Zn, Sr, Mn, Se, Cd, Fe, Na, Al, Cr, Co, and K, were analyzed by inductively coupled plasma atomic emission spectrometry (ICP-AES). Three stable isotopes, including δ13C, δ15N, and δ18O, were measured using an isotope-ratio mass spectrometer (IRMS). For fine classification, three multiclass strategies, includ

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Stinner, J. N., and L. K. Hartzler. "Effect of temperature on pH and electrolyte concentration in air-breathing ectotherms." Journal of Experimental Biology 203, no. 13 (2000): 2065–74. http://dx.doi.org/10.1242/jeb.203.13.2065.

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The aim of this study was to determine the effects of temperature upon pH, protein charge and acid-base-relevant ion exchange in air-breathing ectotherms. Plasma and skeletal muscles in cane toads (Bufo marinus) and bullfrogs (Rana catesbeiana) were examined at 30, 20 and 10 degrees C. In addition, skeletal muscle ion concentrations were examined in black racer snakes (Coluber constrictor) at 30 and 10 degrees C. Cooling the amphibians produced a reduction in most of the plasma ion concentrations (Na(+), K(+), Ca(2+), Cl(−), SO(4)(2)(−)) and in protein concentration because of increased hydrat

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Bossuyt, Julie, Sanda Despa, Jody L. Martin, and Donald M. Bers. "Phospholemman Phosphorylation Alters Its Fluorescence Resonance Energy Transfer with the Na/K-ATPase Pump." Journal of Biological Chemistry 281, no. 43 (2006): 32765–73. http://dx.doi.org/10.1074/jbc.m606254200.

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Phospholemman (PLM) or FXYD1 is a major cardiac myocyte phosphorylation target upon adrenergic stimulation. Prior immunoprecipitation and functional studies suggest that phospholemman associates with the Na/K-pump (NKA) and mediates adrenergic Na/K-pump regulation. Here, we tested whether the NKA-PLM interaction is close enough to allow fluorescence resonance energy transfer (FRET) between cyan and yellow fluorescent (CFP/YFP) fusion proteins of Na/K pump and phospholemman and whether phospholemman phosphorylation alters such FRET. Co-expressed NKA-CFP and PLM-YFP in HEK293 cells co-localized

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Crocker, C. E., R. A. Feldman, G. R. Ultsch, and D. C. Jackson. "Overwintering behavior and physiology of eastern painted turtles (Chrysemys picta picta) in Rhode Island." Canadian Journal of Zoology 78, no. 6 (2000): 936–42. http://dx.doi.org/10.1139/z00-032.

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We equipped 20 eastern painted turtles (Chrysemys picta picta) with radio transmitters and recovered them from a pond in Rhode Island during the winter of 1998-1999. Each month, three turtles were collected without permitting them to breathe. Blood was sampled by cardiac puncture and analyzed for pH, PCO2, PO2, and hematocrit; plasma was analyzed for [Na+], [K+], [Cl], total [Ca], total [Mg], [lactate], and osmolality. In December 1998, mean values for pH, PO2, PCO2, [HCO3], [lactate], total [Ca] and [Mg], hematocrit, and osmolality were 7.84 ± 0.02, 4.7 ± 1.9 mmHg (1 mmHg = 133.3 Pa), 10.2

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Kesic, Zeljka, Ivana Lukic, Miodrag Zdujic, Cedomir Jovalekic, Hui Liu, and Dejan Skala. "Mechanochemical synthesis of CaO•ZnO.K2CO3 catalyst: Characterization and activity for methanolysis of sunflower oil." Chemical Industry and Chemical Engineering Quarterly 21, no. 1-1 (2015): 1–12. http://dx.doi.org/10.2298/ciceq131026041k.

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The goal of this study was to prepare CaO.ZnO catalyst which contain small amount of K2CO3 and analyze its activity for biodiesel synthesis. Catalyst was prepared using the following procedure: CaO and ZnO (molar ratio of 1:2), water and K2CO3 (in various amounts) were mechanochemically treated and after milling heated at 700 oC in air atmosphere for obtaining mixed CaO?ZnO/xK2CO3 oxides (x = 0, 1, 2 and 4; mole of K2CO3 per 10 mole of CaO). All the samples were characterized by X-ray diffraction (XRD), inductively coupled plasma (ICP), X-ray photoelectron spectroscopy (XPS), thermogravimetric

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Li, Shanjia, Hui Wang, Ling Jin, et al. "Validation and analysis of the geographical origin of Angelica sinensis (Oliv.) Diels using multi-element and stable isotopes." PeerJ 9 (August 6, 2021): e11928. http://dx.doi.org/10.7717/peerj.11928.

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Background Place of origin is an important factor when determining the quality and authenticity of Angelica sinensis for medicinal use. It is important to trace the origin and confirm the regional characteristics of medicinal products for sustainable industrial development. Effectively tracing and confirming the material’s origin may be accomplished by detecting stable isotopes and mineral elements. Methods We studied 25 A. sinensis samples collected from three main producing areas (Linxia, Gannan, and Dingxi) in southeastern Gansu Province, China, to better identify its origin. We used induct

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Baj, Jacek, Alicja Forma, Beata Kowalska, et al. "Multi-Elemental Analysis of Human Optic Chiasm—A New Perspective to Reveal the Pathomechanism of Nerve Fibers’ Degeneration." International Journal of Environmental Research and Public Health 19, no. 7 (2022): 4420. http://dx.doi.org/10.3390/ijerph19074420.

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The effect of metals on the functioning of the human eye is multifactorial and includes enzyme activity modulation, trace metal metabolic pathways changes, and cytotoxic activity. Functional dysfunctions appear mostly as a result of the accumulation of toxic xenobiotic metals or disturbances of micronutrients’ homeostasis. So far, the affinity of selected metals to eye tissues, i.e., the cornea, choroid, lens, and anterior chamber fluid, has been most studied. However, it is known that many eye symptoms are related to damage to the optic nerve. In order to fill this gap, the aim of the study i

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Khyzhnyak, S. V., A. O. Velinskaya, E. V. Byschuk, and V. M. Voitsitskiy. "Elemental composition of liver and kidney tissues of rats under the influence of fungicides." Animal Biology 24, no. 2 (2022): 9–13. http://dx.doi.org/10.15407/animbiol24.02.009.

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Widespread use of fungicides in various spheres of human life leads to negative consequences for both humans and the environment. The article presents the results of a study of the acute effect of systemic fungicides of the chemical class triazoles on the content of macro- and microelements in kidney and liver rat tissues. The content of chemical elements was determined by inductively coupled plasma atomic emission spectrometry. The established changes in the content of macro- and microelements in the rat liver and kidney indicate tissue specificity of the fungicidal action. Under the influenc

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Arutyunyan, L. L., E. N. Iomdina, Y. S. Morozova, S. Y. Anisimova, and S. I. Anisimov. "Trace elements imbalance of the scleral shell of the eye in various forms of glaucoma." Modern technologies in ophtalmology, no. 3 (June 1, 2022): 194–204. http://dx.doi.org/10.25276/2312-4911-2022-3-194-204.

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Purpose. To conduct a comparative study of the trace elements balance in scleral biopsies of patients with various clinical forms of glaucoma. Material and methods. The content of trace elements was determined in scleral biopsies of 16 patients with primary open-angle glaucoma (POAG), 13 patients with normal tension glaucoma (NTG) and 15 patients with pseudoexfoliative glaucoma (PEG). The mean age of the patients was 79.5 ± 2.5 years. As a control, fragments of the sclera of 14 cadaveric eyes without a history of glaucoma were used. The concentration of K, Mg, Ca, Fe was estimated using induct

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Demina, Liudmila L., Olga Dara, Ramiz Aliev, et al. "Elemental and Mineral Composition of the Barents Sea Recent and Late Pleistocene−Holocene Sediments: A Correlation with Environmental Conditions." Minerals 10, no. 7 (2020): 593. http://dx.doi.org/10.3390/min10070593.

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A comprehensive examination of the elemental (including radionuclides and heavy metals), mineral, and grain-size composition of sediments from different areas of the Barents Sea was performed. Sediment cores were sampled in the Central Deep, Cambridge Strait (Franz Josef Land Archipelago), Russkaya Gavan’ Bay (Novaya Zemlya Archipelago), and Bear Island Trough. We aim to evaluate how the modern and more ancient environmental conditions are reflected in the elemental and mineral composition, as well as to test indicative elemental ratios. The applied methods include elemental analysis using gam

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Qayyum, S., S. K. Durrani, J. Akhtar, et al. "FORMATION OF LOW TC SUPERCONDUCTING PHASE IN BSCCO SYSTEM." Nucleus 45, no. 1-2 (2020): 33–38. https://doi.org/10.71330/nucleus.45.01-2.995.

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The sol spray process (modified form of sol gel) has been used to prepare Bi-Sr-Ca-Cu-O (BSCCO) homogeneouspowder. In sol spray process, the prepared sol solutions have been dehydrated directly into BSCCO ceramic powder byspraying into a preheated temperature controlled pyrex glass column by means of compressed air atomization withoutthe addition of organic chelating agent or organic templates. The prepared BSCCO material was characterized bythermogravimetric (TG), differential thermal analysis (DTA), X-ray diffraction (XRD), scanning electron microscopy(SEM) techniques. Elemental compositions

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Ramadan, Khaled M. A., Maha Mohammed Alharbi, Asma Massad Alenzi, et al. "Alpha Lipoic Acid as a Protective Mediator for Regulating the Defensive Responses of Wheat Plants against Sodic Alkaline Stress: Physiological, Biochemical and Molecular Aspects." Plants 11, no. 6 (2022): 787. http://dx.doi.org/10.3390/plants11060787.

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Recently, exogenous α-Lipoic acid (ALA) has been suggested to improve the tolerance of plants to a wide array of abiotic stresses. However, there is currently no definitive data on the role of ALA in wheat plants exposed to sodic alkaline stress. Therefore, this study was designed to evaluate the effects of foliar application by ALA at 0 (distilled water as control) and 20 µM on wheat seedlings grown under sodic alkaline stress (50 mM 1:1 NaHCO3 & Na2CO3; pH 9.7. Under sodic alkaline stress, exogenous ALA significantly (p ≤ 0.05) improved growth (shoot fresh and dry weight), chlorophyll (C

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Mattioli, Michele, Paolo Ballirano, Alessandro Pacella, et al. "Fibrous Ferrierite from Northern Italy: Mineralogical Characterization, Surface Properties, and Assessment of Potential Toxicity." Minerals 12, no. 5 (2022): 626. http://dx.doi.org/10.3390/min12050626.

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Nowadays, fibrous minerals pose as significant health hazards to humans, and exposure to these fibers can lead to the development of severe pulmonary diseases. This work investigated the morphology, crystal structure, chemistry, and surface activity of fibrous ferrierite recently found in northern Italy through an integrated approach using scanning electron microscopy–energy dispersive spectroscopy, electron microprobe, inductively coupled plasma atomic emission spectrometry, X-ray powder diffraction, and electron paramagnetic resonance. Our results show that a notable amount of ferrierite fib

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Lin, Y. C., C. J. Tsai, Y. C. Wu, et al. "Characteristics of trace metals in traffic-derived particles in Hsuehshan Tunnel, Taiwan: size distribution, potential source, and fingerprinting metal ratio." Atmospheric Chemistry and Physics 15, no. 8 (2015): 4117–30. http://dx.doi.org/10.5194/acp-15-4117-2015.

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Abstract. Traffic emissions are a significant source of airborne particulate matter (PM) in ambient environments. These emissions contain an abundance of toxic metals and thus pose adverse effects on human health. Size-fractionated aerosol samples were collected from May to September 2013 by using micro-orifice uniform deposited impactors (MOUDIs). Sample collection was conducted simultaneously at the inlet and outlet sites of Hsuehshan Tunnel in northern Taiwan, which is the second-longest freeway tunnel (12.9 km) in Asia. This endeavor aims to characterize the chemical constituents and size

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Youssef, Montaser H. M., Aly Raafat, Ahmed Abou El-Yazied, et al. "Exogenous Application of Alpha-Lipoic Acid Mitigates Salt-Induced Oxidative Damage in Sorghum Plants through Regulation Growth, Leaf Pigments, Ionic Homeostasis, Antioxidant Enzymes, and Expression of Salt Stress Responsive Genes." Plants 10, no. 11 (2021): 2519. http://dx.doi.org/10.3390/plants10112519.

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In plants, α-Lipoic acid (ALA) is considered a dithiol short-chain fatty acid with several strong antioxidative properties. To date, no data are conclusive regarding its effects as an exogenous application on salt stressed sorghum plants. In this study, we investigated the effect of 20 µM ALA as a foliar application on salt-stressed sorghum plants (0, 75 and 150 mM as NaCl). Under saline conditions, the applied-ALA significantly (p ≤ 0.05) stimulated plant growth, indicated by improving both fresh and dry shoot weights. A similar trend was observed in the photosynthetic pigments, including Chl

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Gharibreza, Mohammadreza, Muhammad Aqeel Ashraf, Ismail Yusoff, and John Kuna Raj. "An Evaluation of Bera Lake (Malaysia) Sediment Contamination Using Sediment Quality Guidelines." Journal of Chemistry 2013 (2013): 1–13. http://dx.doi.org/10.1155/2013/387035.

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Bera Lake is known as the first RAMSAR site and is the largest natural lake in Malaysia. Sediment quality guidelines (SQGs) and Geoaccumulation index were used to evaluate Bera Lake sediment contamination. Five undisturbed cores were collected from Bera Lake sediment. Major and trace levels of elements were determined for 132 subsamples using an inductively coupled plasma mass spectrometry (ICP-MS). The results marked two major groups of metallic elements bonded to the terrestrial and organic-rich sediments. Terrestrial sediments were strongly associated with accumulation of Li, Al, Pb, Cu, Cr

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Lin, Y. C., C. J. Tsai, Y. C. Wu, et al. "Characteristics of trace metals in traffic-derived particles in Hsuehshan Tunnel, Taiwan: size distribution, fingerprinting metal ratio, and emission factor." Atmospheric Chemistry and Physics Discussions 14, no. 9 (2014): 13963–4004. http://dx.doi.org/10.5194/acpd-14-13963-2014.

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Abstract. Traffic emissions are a significant source of airborne particulate matter (PM) in ambient environments. These emissions contain high abundance of toxic metals and thus pose adverse effects on human health. Size-fractionated aerosol samples were collected from May to September 2013 by using micro-orifice uniform deposited impactor (MOUDI). Sample collection was conducted simultaneously at the inlet and outlet sites of Hsuehshan Tunnel in northern Taiwan, which is the second longest freeway tunnel (12.9 km) in Asia. Such endeavor aims to characterize the chemical constituents, size dis

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Bingham, S. A., A. Cassidy, T. J. Cole, et al. "Validation of weighed records and other methods of dietary assessment using the 24 h urine nitrogen technique and other biological markers." British Journal of Nutrition 73, no. 4 (1995): 531–50. http://dx.doi.org/10.1079/bjn19950057.

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Results from analysis of 24 h urine collections, verified for completeness with para-amino benzoic acid, and blood samples collected over 1 year were compared with 16 d weighed records of all food consumed collected over the year, and with results from 24 h recalls, food-frequency questionnaires and estimated food records in 160 women. Using the weighed records, individuals were sorted into quintiles of the distribution of the urine N excretion: dietary N intake ratio (UN:DN). UN exceeded DN in the top quintile of this ratio; mean ratio UN:DN = 1·13 Individuals in this top quintile were heavie

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Coelho, Inês, Ekaterina Epova, Julien Barre, Isabel Castanheira, and Olivier F. X. Donard. "Mineral and Isotopic Characterization of Wines From the Douro Demarcated Region." Current Developments in Nutrition 6, Supplement_1 (2022): 478. http://dx.doi.org/10.1093/cdn/nzac059.006.

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Abstract Objectives In the 1960s, the French paradox launched the debate around the benefits of wine consumption. Since then several epidemiological studies have evidenced its potential protective cardiovascular effects. Wine's characteristics are highly dependent on the terroir. This study aims to characterize the profile of 11 minerals and micronutrients (K, Na, Ca, Fe, P, Mg, Mn, Se, Cu, Cr, and Zn) and the 87Sr/86Sr isotopic ratio, and evaluate suitable tracers of authenticity for the Douro Demarcated Region. It will identify the parameters influenced by processing methods or environmental

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Arutyunyan, L. L., E. N. Iomdina, Yu S. Morozova, S. Yu Anisimova, and S. I. Anisimov. "Imbalance of macro- and microelements in the scleral shell of the eye in various forms of glaucoma." National Journal glaucoma 21, no. 2 (2022): 11–18. http://dx.doi.org/10.53432/2078-4104-2022-21-2-11-18.

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PURPOSE. To conduct a comparative study of the balance of macro- and microelements in scleral biopsy samples taken from patients with various clinical forms of glaucoma.METHODS. The content of macro- and microelements was analyzed in scleral biopsy samples of 16 patients with primary open-angle glaucoma (POAG), 13 patients with normal tension glaucoma (NTG) and 15 patients with pseudoexfoliative glaucoma (PEG). The mean age of the patients was 79.5±2.5 years. For control, fragments of the sclera of 14 cadaveric eyes without a history of glaucoma were used. Concentration of macroelements — K, M

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Dixon, D. A., P. A. Mayewski, E. Korotkikh, et al. "Variations in snow and firn chemistry along US ITASE traverses and the effect of surface glazing." Cryosphere 7, no. 2 (2013): 515–35. http://dx.doi.org/10.5194/tc-7-515-2013.

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Abstract. This study provides a baseline from which changes in the chemistry of the atmosphere over Antarctica can be monitored under expected warming scenarios and continued intensification of industrial activities in the Southern Hemisphere. It is the first study to measure more than 25 chemical constituents in the surface snow and firn across extensive regions of Antarctica. We present major ion, trace element, heavy metal, rare earth element and oxygen isotope data from a series of surface snow samples and shallow firn sections collected along four US ITASE traverses across East and West A

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Pagano, Isabella. "Long-term stellar variability." Proceedings of the International Astronomical Union 5, S264 (2009): 136–45. http://dx.doi.org/10.1017/s1743921309992547.

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AbstractStars with significant subsurface convection zones develop magnetic loop structures that, arising from the surface upward to the external atmospheres, cause flux variability detectable throughout the whole electromagnetic spectrum. In fact, diagnostics of magnetic activity are in radio wavelengths, where gyrosincrotron radiation arises from the quiescent and flaring corona; in the optical region, where important signatures are the Balmer lines, the Ca ii IRT and H&K lines; in the UV and X ray domains, the latter mainly due to coronal thermal plasma. The zoo of different magnetic fe

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Charles, Ghany, Sanghapi Hervé, R. Bhatt C, P. Singh Jagdish, Y. Yueh Fang, and Alfarraj Bader. "A Study of Wheat Flour Tortillas using Laser Induced Breakdown Spectroscopy LIBS." International Journal of Trend in Scientific Research and Development 3, no. 6 (2019): 652–59. https://doi.org/10.5281/zenodo.3588821.

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Wheat flour tortillas of different colors and composition were studied with the aid of laser induced breakdown spectroscopy LIBS . Due to its simplicity, fast response, little or no sample preparation, LIBS is presented as an effective tool for rapid in situ sample analysis of food samples with emphasis on tortillas. Spectroscopic analysis of the plasma generated by Nd YAG laser irradiation of tortilla was carried out. A careful selection of spectral lines of Ca, Na and K which do not suffer from spectral interference was made. Spectral properties of the above mentioned elements such as peak i

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Chen, Xu, Chunhua Wen, Debao Meng, Bin Li, Biguang Jiang, and Jinning Qin. "Implications of Major and Trace Element Migration in Altered Granites for Hydrothermal Alteration and Granite-Related Uranium Mineralization in the Sanjiu Ore Field, South China." Minerals 12, no. 2 (2022): 144. http://dx.doi.org/10.3390/min12020144.

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The recently discovered Sanjiu ore field (SJOF) is a granite-related uranium ore field located in the middle of Zhuguangshan (South China). The relationship between hydrothermal alteration of granite and uranium mineralization in the SJOF is crucial yet understudied. In this study, the major- and trace-element contents of granite samples (fresh granite, altered granite, and tectonites) with different uranium contents were analyzed by using X-ray fluorescence spectroscopy (XRF) and inductively coupled plasma–mass spectrometry (ICP–MS). The analytical results show a relative increase in Si, S, C

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Bian, Qijing, Badr Alharbi, Mohammed M. Shareef, et al. "Sources of PM<sub>2.5</sub> carbonaceous aerosol in Riyadh, Saudi Arabia." Atmospheric Chemistry and Physics 18, no. 6 (2018): 3969–85. http://dx.doi.org/10.5194/acp-18-3969-2018.

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Abstract. Knowledge of the sources of carbonaceous aerosol affecting air quality in Riyadh, Saudi Arabia, is limited but needed for the development of pollution control strategies. We conducted sampling of PM2.5 from April to September 2012 at various sites in the city and used a thermo-optical semi-continuous method to quantify the organic carbon (OC) and elemental carbon (EC) concentrations. The average OC and EC concentrations were 4.7 ± 4.4 and 2.1 ± 2.5 µg m−3, respectively, during this period. Both OC and EC concentrations had strong diurnal variations, with peaks at 06:00–08:00 LT and 2

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Yasutake, Masahiro, Zhiyun Noda, Junko Matsuda, Stephen Matthew Lyth, Masamichi Nishihara, and Kazunari Sasaki. "Ru-Core Ir-Shell Catalysts Deposited on a Surface-Modified Porous Transport Layer for Polymer Electrolyte Membrane Water Electrolysis Anode." ECS Meeting Abstracts MA2024-02, no. 45 (2024): 3179. https://doi.org/10.1149/ma2024-02453179mtgabs.

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Introduction The capital expenditure of electrolyzers significantly impacts the cost of green hydrogen. Regarding polymer electrolyte membrane water electrolysis, platinum group metal (PGM) loading is the major factor in increasing the electrolyzer cost. In particular, anode components have to use a large amount of PGM materials for their severe acidic and high potential condition. Iridium catalysts for oxygen evolution reactions (OER) and platinum coatings to prevent Ti oxidation of the porous transport layer (PTL) should be reduced to meet the future PGM loading requirements 1. Our research

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Kolmykov, Roman P., Аnna V. Petrushina, and Sergey A. Sozinov. "Influence of the binder used in pressing ash for laser sampling on the quality of analytical signals of the elements detected." Butlerov Communications 60, no. 10 (2019): 110–15. http://dx.doi.org/10.37952/roi-jbc-01/19-60-10-110.

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This work is devoted to determining the chemical composition of coal ashes. We used the optical emission spectrometry with inductively coupled plasma and laser sampling as a research method. The aim of the work is to determine the limits of detection (LoDs) and quantitative determination (LoQs) of elements in ashes using polyvinyl alcohol (PVA) and microcrystalline cellulose (MCC) as binders. In this work, analytical signals of Al, Ba, Be, Ca, Cr, Cu, Fe, K, La, Li, Mg, Mn, Na, Ni, P, Pb, S, Sc, Sr, Ti, Y, V, Zr, and Zn were analyzed in tablets obtained from the standard samples ZUK-1, ZUK-2,

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