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Journal articles on the topic 'Ion uptake'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Banat, Fawzi, Sameer Al-Asheh, and Dheaya‘ Al-Rousan. "Comparison between Different Keratin-composed Biosorbents for the Removal of Heavy Metal Ions from Aqueous Solutions." Adsorption Science & Technology 20, no. 4 (2002): 393–416. http://dx.doi.org/10.1260/02636170260295579.

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This study examined and compared the ability of chicken feathers, human hair and animal horns, as keratin-composed biosorbents, for the removal of Zn2+ and Cu2+ ions from single metal ion aqueous solutions under different operating conditions. The three biosorbents investigated in this study were all capable of adsorbing Zn2+ and Cu2+ ions from aqueous solutions. The biosorbent showing the highest uptake of Zn2+ and Cu2+ ions was animal horns. Chicken feathers showed a higher Cu2+ ion uptake and a lower Zn2+ ion compared to human hair. Increasing the initial concentration of Zn2+ or Cu2+ ions,

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2

Okada, Tetsuo, and Jayakumar M. Patil. "Ion Uptake by Zwitterionic Surfaces." Langmuir 14, no. 21 (1998): 6241–48. http://dx.doi.org/10.1021/la980442c.

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3

BOULDIN, D. R. "A multiple ion uptake model." Journal of Soil Science 40, no. 2 (1989): 309–19. http://dx.doi.org/10.1111/j.1365-2389.1989.tb01276.x.

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4

Zou, Jishuang, Lihe Shi, Weiting Cheng, et al. "Ion Interference Reduces the Uptake and Accumulation of Magnesium Ions in Tea Plants (Camellia sinensis)." Plants 14, no. 5 (2025): 643. https://doi.org/10.3390/plants14050643.

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Magnesium (Mg) ions play a crucial role in the growth and development of tea plants (Camellia sinensis). In this study, the ion kinetic method was used to analyze the effect of ions from various elements on the Mg ion uptake rate in two tea plant varieties (Rougui and Shuixian). Additionally, Mg ion content and the expression intensity of CsMGT5 gene in the tea plant’s root system were measured to further understand how different elemental ions affect Mg ion uptake and accumulation. The results revealed that while the trends in the effects of different elements on Mg ion uptake were similar in

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5

An, Hyung-Hwan, and Changyun Shin. "Preparation of Cation Exchanger Using Electrospun Polystyrene Nanofiber." Journal of Advanced Computational Intelligence and Intelligent Informatics 10, no. 2 (2006): 196–200. http://dx.doi.org/10.20965/jaciii.2006.p0196.

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We studied a new ion exchanger for high ion exchange capacity (IEC) and rapid ion exchange. Polystyrene nanofiber ion exchangers (PSNIEs) were prepared by electrospinning from solutions of dissolved polystyrene followed by sulfonation. Coating and sulfonation were used to modify the glass fiber surface with polystyrene to produce cation exchanger fiber (CEF). We present new experimental results on the performance of PSNIE and CEF related to parameters of IEC, water uptake, and surface morpoholgy. IEC and water uptake of PSNIE depend on sulfonation time. IEC reached 3.74 mmol/g at relatively hi

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6

Al-Asheh, Sameer, Fawzi Banat, and Nagham Al-Hamed. "Adsorption of Pollutants from Aqueous Solutions Using Activated and Non-Activated Oak Shells: Parametric and Fractional Factorial Design Study. Part I. Removal of Copper." Adsorption Science & Technology 21, no. 2 (2003): 177–88. http://dx.doi.org/10.1260/026361703769013907.

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Non-activated and chemically activated oak shells were evaluated for their ability to remove Cu2+ ions from aqueous solutions. Batch adsorption experiments were conducted to investigate the effect of contact time, sorbent concentration, Cu2+ ion concentration and the pH of the solution on the sorption process. The Cu2+ ion uptake by oak shells increased with decreasing sorbent concentration or with an increase in Cu2+ ion concentration or solution pH. The fractional factorial design technique was applied in order to determine the average Cu2+ ion uptake, the contribution of each operating vari

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7

Degryse, Fien, and Erik Smolders. "Cadmium and nickel uptake by tomato and spinach seedlings: plant or transport control?" Environmental Chemistry 9, no. 1 (2012): 48. http://dx.doi.org/10.1071/en11060.

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Environmental contextUptake of metal ions by plants is often predicted with equilibrium models, which assume that the rate limiting step is trans-membrane uptake of the metal in the roots rather than the transport of the metal ion towards the site of uptake. Evidence is given that uptake of cadmium by plants is under strong transport control at environmentally relevant concentrations, whereas nickel uptake borders between transport and plant control. This explains the lack of ion competition effects for Cd uptake, whereas both proton and Mg ions were found to compete with Ni uptake. AbstractEq

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8

Yehia, Ahmed, and Khaled Ezzat. "Fluoride Ion Uptake by Synthetic Apatites." Adsorption Science & Technology 27, no. 3 (2009): 337–47. http://dx.doi.org/10.1260/026361709789868910.

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9

Shank, Richard P., Craig R. Schneider, and Joseph J. Tighe. "Ion Dependence of Neurotransmitter Uptake: Inhibitory Effects of Ion Substitutes." Journal of Neurochemistry 49, no. 2 (1987): 381–88. http://dx.doi.org/10.1111/j.1471-4159.1987.tb02876.x.

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10

Degryse, Fien, Erik Smolders, and David R. Parker. "An Agar Gel Technique Demonstrates Diffusion Limitations to Cadmium Uptake by Higher Plants." Environmental Chemistry 3, no. 6 (2006): 419. http://dx.doi.org/10.1071/en06057.

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Environmental Context. Toxic effects of trace metals are often related to the amount of metal that is internalized by the organism. Uptake of metals by biota is usually predicted with equilibrium models, which assume that transport of the metal from the solution to the biosurface does not limit uptake. In this study, uptake of cadmium by higher plants is shown to be limited by the transport of the free ions to the root surface under a range of conditions. Abstract. Uptake of cadmium (Cd) by spinach and wheat was higher in the presence of fast-dissociating complexes than in unbuffered solutions

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11

Magargal, W. W., and H. W. Overbeck. "Effect of hypertensive rat plasma on ion transport of cultured vascular smooth muscle." American Journal of Physiology-Heart and Circulatory Physiology 251, no. 5 (1986): H984—H990. http://dx.doi.org/10.1152/ajpheart.1986.251.5.h984.

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We layered fresh, unprocessed plasma from healthy rats with early (less than or equal to 7 days) or benign, chronic (greater than 3 wk) one-kidney, one-clip hypertension and from paired one-kidney normotensive control rats over confluent primary-cultured rat aortic smooth muscle cells. Plasma from all rats increased cellular ouabain-sensitive 86Rb+ uptake and sodium content and decreased ouabain-insensitive 86Rb+ uptake compared with uptakes and content in the presence of balanced salt solution (P less than 0.01). Cells incubated in the presence of plasma from rats with early (P less than 0.02

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12

Kiri, Idris Z. "Mechanisms of Nutrient Uptake and Assimilation Processes in Some Plants: A Review." Dutse Journal of Pure and Applied Sciences 9, no. 2b (2023): 223–37. http://dx.doi.org/10.4314/dujopas.v9i2b.24.

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Nutrient demands of plants are fulfilled via nutrient uptake by the roots, even though minor quantities of certain nutrients might be assimilated via leaves. For the reason that the majority of nutrients are assimilated by roots, an understanding of root morphology and cell structure is crucial in knowing this basic plant process. Nutrient achievement by plants hinges on ion applications on superficial, root assimilation capacity, and plant requirement. Movement of ion in plant cells is classified into active and passive. Ion concentrations in the cytoplasm of plant cells are frequently and co

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13

da Rocha, Nilce C. C., Elena Mavropoulos, Marcelo Henrique Prado da Silva, R. C. de Campos, and Antonella M. Rossi. "Studies on Cadmium Uptake by Hydroxyapatite." Key Engineering Materials 330-332 (February 2007): 123–26. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.123.

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Cadmium uptake by hydroxyapatite from aqueous solution was studied in time intervals between 2 minutes and 96 hours, using different Cd2+ concentrations (21 to 768 mg L-1). The solution pH after Cd2+ uptake was assessed. Dissolution experiments at fixed pH were performed in order to evaluate the ion exchange process. Cd2+sorption by hydroxyapatite is fast and it happens simultaneously by different mechanisms. Ion exchange is the main mechanism, where mechanism Cd2+ present in aqueous solution replaces Ca2+ from hydroxyapatite structure.

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14

ANDREWS, DWAYNE, and DAVID FENSOM. "INJURY TO ACTIVE METABOLISM IN WOODY PLANT TISSUE ASSESSED BY 86Rb (K ANALOGUE) UPTAKE AND ELECTRICAL CAPACITANCE TECHNIQUES." Canadian Journal of Plant Science 69, no. 4 (1989): 1273–76. http://dx.doi.org/10.4141/cjps89-154.

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Using 86Rb as an analogue for K+, the uptake of K-ions in 15 mg during one hour in labelled KCl (1 mmolar) solution has been found to be very significantly different in tissue from living twigs of woody plants compared with that from dead twigs. This uptake test has been successfully applied to twigs and discriminates among living, damaged and killed tissue. A modification can assess damage to buds. Ion uptake results supplement the results of electrical cambial capacitance, measured at temperatures 10–25 °C.Key words: Tissue, viability, ion uptake

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15

Afzal, Shehrooz, Faiza Samreen, Aiman Salam, et al. "Impact of Various Levels of Salinity Stress on Growth Attributes of Some Salt-Sensitive and Tolerant Varieties of Mung Bean." International Journal of Plant Biology & Research 12, no. 1 (2024): 1–3. http://dx.doi.org/10.47739/2333-6668.plantbiology.1138.

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Salinity stress poses a significant threat to crop productivity, and understanding the mechanisms of ion uptake and distribution in different cultivars is crucial for developing salt-tolerant varieties. This study investigates the patterns of ion uptake and distribution in salt-sensitive and salt-tolerant cultivars of Vigna radiata, commonly known as mung bean. Hydroponic experiments were conducted under controlled conditions to assess the responses of two contrasting cultivars to varying salt concentrations. The study reveals distinct differences in the ion uptake and distribution between sal

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16

Kumai, Yusuke, Nicholas J. Bernier, and Steve F. Perry. "Angiotensin-II promotes Na+ uptake in larval zebrafish, Danio rerio, in acidic and ion-poor water." Journal of Endocrinology 220, no. 3 (2013): 195–205. http://dx.doi.org/10.1530/joe-13-0374.

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The contribution of the renin–angiotensin system (RAS) to Na+uptake was investigated in larval zebrafish (Danio rerio). At 4 days post fertilization (dpf), the level of whole-body angiotensin-II (ANG-II) was significantly increased after 1- or 3-h exposure to acidic (pH=4.0) or ion-poor water (20-fold dilution of Ottawa tapwater), suggesting rapid activation of the RAS. Long-term (24 h) treatment of 3 dpf larvae with ANG-I or ANG-II significantly increased Na+uptake which was accompanied by an increase in mRNA expression of the Na+-Cl−cotransporter (zslc12a10.2). Induction of Na+uptake by expo

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17

VareÄka, Ludovit, Peter Å migÃ¡Å, and Miloslav GreksÃ¡k. "Calcium ion uptake byMethanobacterium thermoautotrophicum: Evidence for a carrier-mediated uptake system." FEMS Microbiology Letters 107, no. 2-3 (1993): 241–45. http://dx.doi.org/10.1111/j.1574-6968.1993.tb06036.x.

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18

Inoue, Chihiro, Tomonobu Kusano, and Simon Silver. "Mercuric Ion Uptake byEscherichia coliCells ProducingThiobacillus ferrooxidansMerC." Bioscience, Biotechnology, and Biochemistry 60, no. 8 (1996): 1289–92. http://dx.doi.org/10.1271/bbb.60.1289.

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19

Holmes, Ann R., Richard D. Cannon, and Maxwell G. Shepherd. "Effect of calcium ion uptake onCandida albicansmorphology." FEMS Microbiology Letters 77, no. 2-3 (1991): 187–94. http://dx.doi.org/10.1111/j.1574-6968.1991.tb04345.x.

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20

Nagy, N. M., and J. Kónya. "Cesium Ion Uptake by Moss (Hypnum cupressiforme)." Isotopenpraxis Isotopes in Environmental and Health Studies 27, no. 1 (1991): 21–23. http://dx.doi.org/10.1080/10256019108622455.

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21

Rao, B. K., and P. Jena. "Hydrogen Uptake by an Alkali Metal Ion." Europhysics Letters (EPL) 20, no. 4 (1992): 307–12. http://dx.doi.org/10.1209/0295-5075/20/4/004.

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22

Al-Attar, Lina, and Youssef Budeir. "Thorium Uptake on Synthetic Inorganic Ion Exchangers." Separation Science and Technology 46, no. 15 (2011): 2313–21. http://dx.doi.org/10.1080/01496395.2011.595030.

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23

Zamboulis, D., P. Misaelides, D. Bakoyannakis, et al. "Perrhenate ion uptake by aluminium hydroxide gels." Journal of Radioanalytical and Nuclear Chemistry Articles 208, no. 2 (1996): 507–17. http://dx.doi.org/10.1007/bf02040068.

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24

Xu, Yaolin, Ellie Swaans, Shibabrata Basak, Henny W. Zandbergen, Dana M. Borsa, and Fokko M. Mulder. "Reversible Na-Ion Uptake in Si Nanoparticles." Advanced Energy Materials 6, no. 2 (2015): 1501436. http://dx.doi.org/10.1002/aenm.201501436.

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25

EVANGELOU, V. P., and G. J. WAGNER. "Effects of Ion Activity and Sugar Polyalcohol Osmotica on Ion Uptake." Journal of Experimental Botany 38, no. 10 (1987): 1637–51. http://dx.doi.org/10.1093/jxb/38.10.1637.

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26

Sacher, A., A. Cohen, and N. Nelson. "Properties of the mammalian and yeast metal-ion transporters DCT1 and Smf1p expressed in Xenopus laevis oocytes." Journal of Experimental Biology 204, no. 6 (2001): 1053–61. http://dx.doi.org/10.1242/jeb.204.6.1053.

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Transition metals are essential for many metabolic processes, and their homeostasis is crucial for life. Metal-ion transporters play a major role in maintaining the correct concentrations of the various metal ions in living cells. Little is known about the transport mechanism of metal ions by eukaryotic cells. Some insight has been gained from studies of the mammalian transporter DCT1 and the yeast transporter Smf1p by following the uptake of various metal ions and from electrophysiological experiments using Xenopus laevis oocytes injected with RNA copies (c-RNA) of the genes for these transpo

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27

S.C., Das. "Ion-exchange studies of resin copolymers derived from aromatic hydroxy compounds." Journal of Indian Chemical Society Vol. 77, Feb 2000 (2000): 66–69. https://doi.org/10.5281/zenodo.5862154.

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Department of Chemistry, S. V. M. College, Jagatsinghpur-754 103, India <em>Manuscript received 18 September 1998, revised 22 June 1999, accepted 20 August 1999</em> The ion-exchange capacity, effect of electrolytes on metal uptake, rate of metal uptake and distribution of metal ion at different pHs of resin copolymers derived from thiosemicarbazone derivatives of phenolic compounds shows higher order than the resin copolymer derived from semicarbazone derivatives. The results are compared with the commercial ion-exchangers.

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28

Bolger, G. T., E. M. Luchowski, and D. J. Triggle. "Characterization of ion movements and their relationship to muscarinic receptor binding and excitation–contraction coupling in guinea pig ileal longitudinal smooth muscle." Canadian Journal of Physiology and Pharmacology 67, no. 4 (1989): 331–43. http://dx.doi.org/10.1139/y89-054.

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The relationship between ion movements (sodium uptake and potassium release) and agonist-induced contractile responses or muscarinic receptor binding was investigated in the guinea pig ileal longitudinal muscle (GPLM). Sodium uptake and potassium release were agonist-dependent, concentration-dependent, and stereoselective, with the following rank order of maximum ion movement: muscarinic agonists > histamine > substance P = serotonin. Potassium depolarization did not initiate sodium uptake or potassium release. Sodium uptake was rapid and monophasic, preceding potassium release which was

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29

Krom, Bastiaan P., Jessica B. Warner, Wil N. Konings, and Juke S. Lolkema. "Complementary Metal Ion Specificity of the Metal-Citrate Transporters CitM and CitH of Bacillus subtilis." Journal of Bacteriology 182, no. 22 (2000): 6374–81. http://dx.doi.org/10.1128/jb.182.22.6374-6381.2000.

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ABSTRACT Citrate uptake in Bacillus subtilis is stimulated by a wide range of divalent metal ions. The metal ions were separated into two groups based on the expression pattern of the uptake system. The two groups correlated with the metal ion specificity of two homologousB. subtilis secondary citrate transporters, CitM and CitH, upon expression in Escherichia coli. CitM transported citrate in complex with Mg2+, Ni2+, Mn2+, Co2+, and Zn2+ but not in complex with Ca2+, Ba2+, and Sr2+. CitH transported citrate in complex with Ca2+, Ba2+, and Sr2+ but not in complex with Mg2+, Ni2+, Mn2+, Co2+, a

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30

Pinilla-Tenas, Jorge J., Brian K. Sparkman, Ali Shawki, et al. "Zip14 is a complex broad-scope metal-ion transporter whose functional properties support roles in the cellular uptake of zinc and nontransferrin-bound iron." American Journal of Physiology-Cell Physiology 301, no. 4 (2011): C862—C871. http://dx.doi.org/10.1152/ajpcell.00479.2010.

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Recent studies have shown that overexpression of the transmembrane protein Zrt- and Irt-like protein 14 (Zip14) stimulates the cellular uptake of zinc and nontransferrin-bound iron (NTBI). Here, we directly tested the hypothesis that Zip14 transports free zinc, iron, and other metal ions by using the Xenopus laevis oocyte heterologous expression system, and use of this approach also allowed us to characterize the functional properties of Zip14. Expression of mouse Zip14 in RNA-injected oocytes stimulated the uptake of 55Fe in the presence of l-ascorbate but not nitrilotriacetic acid, indicatin

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31

Zimmer, Alex M., Milica Mandic, Hong Meng Yew, et al. "Use of a carbonic anhydrase Ca17a knockout to investigate mechanisms of ion uptake in zebrafish (Danio rerio)." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 320, no. 1 (2021): R55—R68. http://dx.doi.org/10.1152/ajpregu.00215.2020.

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In fishes, branchial cytosolic carbonic anhydrase (CA) plays an important role in ion and acid-base regulation. The Ca17a isoform in zebrafish ( Danio rerio) is expressed abundantly in Na+-absorbing/H+-secreting H+-ATPase-rich (HR) cells. The present study aimed to identify the role of Ca17a in ion and acid-base regulation across life stages using CRISPR/Cas9 gene editing. However, in preliminary experiments, we established that ca17a knockout is lethal with ca17a−/− mutants exhibiting a significant decrease in survival beginning at ∼12 days postfertilization (dpf) and with no individuals surv

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32

Bunge, A. L., and C. J. Radke. "The Origin of Reversible Hydroxide Uptake on Reservoir Rock." Society of Petroleum Engineers Journal 25, no. 05 (1985): 711–18. http://dx.doi.org/10.2118/11798-pa.

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Abstract When reservoir solids reversibly consume hydroxide, the impact on alkaline-waterflood performance can be significant. Only recently has this reaction been recognized as a principal factor influencing oil recovery rates and chemical-pulse depletion. This paper considers the origin of the reversible hydroxide uptake to be ion exchange of sodium for hydrogen ions. Using a simple, mass-action equilibrium model, we describe the alkali exchange isotherm. Because hydronium and hydroxide concentrations in water are never zero, hydroxide uptake must be reported relative to a reference pH and s

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33

Shin, Hyuksoo, Jihee Kim, Dowan Kim, et al. "Aqueous “polysulfide-ene” polymerization for sulfur-rich nanoparticles and their use in heavy metal ion remediation." Journal of Materials Chemistry A 6, no. 46 (2018): 23542–49. http://dx.doi.org/10.1039/c8ta05457f.

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34

Escalante, B. A., N. R. Ferreri, C. E. Dunn, and J. C. McGiff. "Cytokines affect ion transport in primary cultured thick ascending limb of Henle's loop cells." American Journal of Physiology-Cell Physiology 266, no. 6 (1994): C1568—C1576. http://dx.doi.org/10.1152/ajpcell.1994.266.6.c1568.

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Tumor necrosis factor-alpha (TNF) and interleukin-1 (IL-1) affect epithelial cell ion transport. However, the site of action along the nephron has not been elucidated fully for these cytokines. Thus, the effect of TNF and IL-1 on the ion transport function of primary cultured medullary thick ascending limb of Henle's loop (mTALH) cells was determined by measuring rubidium (86Rb) uptake. TNF, IL-1, and lipopolysaccharide (LPS), a known activator of cytokine production, inhibited 86Rb uptake by cultured mTALH cells after a 24-h incubation period but had no effect when incubated with the cells fo

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35

Chesney, R. W., I. Zelikovic, A. Budreau, and D. Randle. "Chloride and membrane potential dependence of sodium ion-proline symport." Journal of the American Society of Nephrology 2, no. 4 (1991): 885–93. http://dx.doi.org/10.1681/asn.v24885.

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Proline accumulation by renal proximal tubule brush border membrane vesicles is Na+ dependent, but little is known about the role of anions or membrane potential on proline uptake. Recent studies in a variety of transport systems, including rat renal brush border membrane vesicles, indicate that halide anions chloride (Cl-) and bromide (Br-) are essential for glycine, beta-alanine, gamma-aminobutyric acid, and taurine uptake, so the possibility that Na(+)-proline symport is Cl- dependent was explored. Also, the role of membrane potential on transport was assessed by determining the effect of e

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36

Huang, Wei Z., and Jeff J. Schoenau. "Seasonal and spatial variations in soil nitrogen and phosphorus supply rates in a boreal aspen forest." Canadian Journal of Soil Science 77, no. 4 (1997): 597–612. http://dx.doi.org/10.4141/s97-002.

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Soil nitrogen (N) and phosphorus (P) supply is one of the growth limiting factors in many forest ecosystems. Seasonal patterns in soil N and P supply rate were examined during a 2-yr period (1994–1995) for forest floor (L, F and H) and upper mineral (Ae) horizons in an 80-yr-old aspen forest in Saskatchewan, Canada. Accumulation of plant nutrient ions on ion exchange resins incubated in the field can provide an estimate of nutrient supply rate in soils because ion exchange resins have the potential ability to simulate nutrient flux to plant roots. Nutrient supply rates and the effect of plant

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37

Drake, Lawrence R., Carl E. Hensman, Shan Lin, Gary D. Rayson, and Paul J. Jackson. "Characterization of Metal Ion Binding Sites on Datura Innoxia by Using Lanthanide Ion Probe Spectroscopy." Applied Spectroscopy 51, no. 10 (1997): 1476–83. http://dx.doi.org/10.1366/0003702971939253.

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The excitation spectra associated with the 7F0↦5D0 transition of Eu+3 has been used to examine the binding sites on cell wall fragments of Datura innoxia. Both native and esterified cell wall fragments were each examined at pH 5 and pH 2 to determine the contributions to metal ion sorption from both the carboxylate and sulfonate functional groups. The excitation spectra have been de-convoluted into the individual groups responsible for metal ion uptake. At least four unique binding sites can be described as being responsible for metal ion uptake. The higher affinity sites involve carboxylates

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38

Le Deunff, Erwan, Philippe Malagoli, and Marie-Laure Decau. "Modelling Nitrogen Uptake in Plants and Phytoplankton: Advantages of Integrating Flexibility into the Spatial and Temporal Dynamics of Nitrate Absorption." Agronomy 9, no. 3 (2019): 116. http://dx.doi.org/10.3390/agronomy9030116.

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Under field conditions, plants need to optimize nutrient ion and water acquisition in their fluctuating environment. One of the most important variables involved in variations of ion uptake processes is temperature. It modifies the thermodynamic processes of root uptake and ion diffusion in soil throughout day–night and ontogenetic cycles. Yet, most models of nitrogen (N) uptake in plants are built from set values of microscopic kinetic parameters, Vm and Km, derived from a Michaelis–Menten (MM) interpretation of nutrient isotherms. An isotherm is a curve depicting the response of root nitrate

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39

Geck, P., F. D. Maul, G. Hör, D. L. Munz, and M. J. Sessler. "New Aspects of Cellular Thallium Uptake. Tl+-Na+-2Cl–-Cotransport Is the Central Mechanism of Ion Uptake." Nuklearmedizin 25, no. 01 (1986): 24–27. http://dx.doi.org/10.1055/s-0038-1624314.

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SummaryCellular uptake mechanisms of 201T1+ were studied in Ehrlich mouse ascites tumor cells. 201Tl+ passes the cell membrane of tumor cells using three transport systems: the ATPase, the Tl+-Na+-2Cl−-cotransport, and the Ca++-dependent ion channel. In the case of 201T1+ the main route for entering the cells was the cotransport, its importance increasing with the age of the cells; in parallel, the ATPase activity was reduced. In contrast, the transport capacities of the ATPase and the cotransport were of the same magnitude in the case of 42K+ and 86Rb+. This change in ion distribution was not

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40

Zhao, Shouping, Qi Zhang, Wendan Xiao, De Chen, and Xuezhu Ye. "Absorption of cadmium accompanied by EDTA varies according to tomato cultivar." Crop and Pasture Science 70, no. 11 (2019): 981. http://dx.doi.org/10.1071/cp19130.

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Two tomato (Lycopersicum solanum) varieties, one high (YSL189) and one low (HZ903) cadmium (Cd) accumulator, were used in our experiment. We detected cadmium (Cd ion/Cd-EDTA) uptake rates in roots and the corresponding expression of the Cd transport genes IRT1, IRT2, ZIP, Nramp1, Nramp2 and Nramp3. Our data proved that both cultivars – YSL189 and HZ903 – showed higher Cd accumulation in plants and a higher Cd uptake rate in roots supplied with Cd ion than with Cd-EDTA. In roots of YSL189, the expression levels of IRT1, IRT2, ZIP, Nramp1, Nramp3 and Nramp2 (5, 10 and 20 µmolc L–1 Cd) treated wi

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41

Potts, W. T. "Kinetics of sodium uptake in freshwater animals: a comparison of ion-exchange and proton pump hypotheses." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 266, no. 2 (1994): R315—R320. http://dx.doi.org/10.1152/ajpregu.1994.266.2.r315.

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Sodium uptake has been shown to follow saturation kinetics in many freshwater species of animals, and in the presence of hydrogen ions uptake appears to show competitive inhibition. These characteristics are compatible with the hypothesis that uptake occurs via a carrier-mediated exchange of sodium ion for hydrogen ion. However, recently it has been shown that in frog skin, sodium uptake is driven by an electrogenic pump not directly linked to sodium, and evidence is accumulating that a similar pump may occur in other freshwater animals. A mathematical model is developed that shows that a prot

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Nishimura, Ken, Kazuei Igarashi, and Yoshimi Kakinuma. "Proton Gradient-Driven Nickel Uptake by Vacuolar Membrane Vesicles of Saccharomyces cerevisiae." Journal of Bacteriology 180, no. 7 (1998): 1962–64. http://dx.doi.org/10.1128/jb.180.7.1962-1964.1998.

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ABSTRACT A vacuolar H+-ATPase-negative mutant ofSaccharomyces cerevisiae was highly sensitive to nickel ion. Accumulation of nickel ion in the cells of this mutant of less than 60% of the value for the parent strain arrested growth, suggesting a role for this ATPase in sequestering nickel ion into vacuoles. An artificially imposed pH gradient (interior acid) induced transient nickel ion uptake by vacuolar membrane vesicles, which was inhibited by collapse of the pH difference but not of the membrane potential. Nickel ion transport into vacuoles in a pH gradient-dependent manner is thus importa

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Chua, Anita C. G., John K. Olynyk, Peter J. Leedman, and Debbie Trinder. "Nontransferrin-bound iron uptake by hepatocytes is increased in the Hfe knockout mouse model of hereditary hemochromatosis." Blood 104, no. 5 (2004): 1519–25. http://dx.doi.org/10.1182/blood-2003-11-3872.

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Abstract Hereditary hemochromatosis (HH) is an iron-overload disorder caused by a C282Y mutation in the HFE gene. In HH, plasma nontransferrin-bound iron (NTBI) levels are increased and NTBI is bound mainly by citrate. The aim of this study was to examine the importance of NTBI in the pathogenesis of hepatic iron loading in Hfe knockout mice. Plasma NTBI levels were increased 2.5-fold in Hfe knockout mice compared with control mice. Total ferric citrate uptake by hepatocytes isolated from Hfe knockout mice (34.1 ± 2.8 pmol Fe/mg protein/min) increased by 2-fold compared with control mice (17.8

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Wilson, H. D., H. P. Schedl, and K. Christensen. "Calcium uptake by brush-border membrane vesicles from the rat intestine." American Journal of Physiology-Renal Physiology 257, no. 3 (1989): F446—F453. http://dx.doi.org/10.1152/ajprenal.1989.257.3.f446.

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Uptake of calcium by brush-border membrane vesicles from rat small intestine is composed of saturable and nonsaturable components. We studied regulation of calcium uptake using the divalent cations strontium, a foreign ion that mimics calcium biologically and magnesium, a physiologically important ion that resembles calcium physically, although not biologically. Strontium present outside the vesicle inhibited saturable calcium uptake competitively, consistent with binding to the transporter at the same site as calcium. Strontium inside the vesicle accelerated saturable calcium uptake from the

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Wang, Shoule, Shaoqing Ge, Changyan Tian, and Wenxuan Mai. "Nitrogen–Salt Interaction Adjusts Root Development and Ion Accumulation of the Halophyte Suaeda salsa." Plants 11, no. 7 (2022): 955. http://dx.doi.org/10.3390/plants11070955.

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Nitrogen (N) application might exert a great impact on root (biomass, length) distribution, which possibly contributes to ion and nutrient uptakes. Here, we address the effects of N application on these characteristics to detect how N improves its salt tolerance. Suaeda salsa was subjected to four salt levels (0.5, 1.0, 1.5, and 2.0%) and three N treatments (NO3−-N: 0, 0.25, and 0.50 g·kg−1) in soil column experiments. The N applications performed a “dose effect” that significantly enhanced the growth of Suaeda at low salt levels, while negative effects were displayed at high salt levels. Mode

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Shuttleworth, Trevor J. "Overview of epithelial ion-transport mechanisms." Canadian Journal of Zoology 67, no. 12 (1989): 3032–38. http://dx.doi.org/10.1139/z89-426.

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The basic cellular transport mechanisms for the transepithelial uptake and elimination of sodium and chloride ions are briefly reviewed. These frequently involve processes defined as secondary active mechanisms, and the problems that this creates for their identification in epithelial systems are emphasised. It is suggested that despite the wide range of epithelial tissues involved in body fluid ion regulation, current evidence indicates that a relatively limited group of these secondary active carriers is involved in the transport process, and the basis for this evolutionary conservatism is d

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Shinde, Sudhirkumar, Mona Mansour, Anil Incel, Liliia Mavliutova, Celina Wierzbicka, and Börje Sellergren. "High salt compatible oxyanion receptors by dual ion imprinting." Chemical Science 11, no. 16 (2020): 4246–50. http://dx.doi.org/10.1039/c9sc06508c.

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Hawkins, B. J., and J. M. Kranabetter. "Quantifying inorganic nitrogen uptake capacity among ectomycorrhizal fungal species using MIFE microelectrode ion flux measurements: theory and applications." Botany 95, no. 10 (2017): 963–69. http://dx.doi.org/10.1139/cjb-2017-0028.

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A growing appreciation of the intimate association between trees and a wide diversity of mycorrhizal fungi in forest ecosystems is leading to the view that trees and their associated mycorrhizal symbionts should be considered meta-organisms or holobionts. For ectomycorrhizal associations, nitrogen (N) mobilization and uptake is a major contribution from the fungal partners. This paper reviews the traditional methods of measuring N uptake by ectomycorrhizae, and describes the application of microelectrode ion flux measurement of nitrogen uptake using the MIFETM technique to ectomycorrhizal fung

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Chitrakar, Ramesh, Keisuke Mizobuchi, Akinari Sonoda, and Takahiro Hirotsu. "Uptake of Bromate Ion on Amorphous Aluminum Hydroxide." Industrial & Engineering Chemistry Research 49, no. 18 (2010): 8726–32. http://dx.doi.org/10.1021/ie901705n.

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Yuan, Yu, Haoxiang Yu, Xing Cheng, et al. "H0.92K0.08TiNbO5 Nanowires Enabling High-Performance Lithium-Ion Uptake." ACS Applied Materials & Interfaces 11, no. 9 (2019): 9136–43. http://dx.doi.org/10.1021/acsami.8b21817.

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