scholarly journals SORPTION OF AMINO ACID AND CHANGES IN HYDRATION OF HETEROGENEOUS CATION- AND ANION-EXCHANGE MEMBRANES FUMASEP

2018 ◽  
Vol 59 (4) ◽  
pp. 73
Author(s):  
Nina I. Maiygurova ◽  
Frank Roessner ◽  
Tatiana V. Eliseeva ◽  
Vladimir F. Selemenev
Keyword(s):  
Mass Transfer ◽  
Amino Acid ◽  
Ir Spectroscopy ◽  
Acid Solution ◽  
Anion Exchange ◽  
Significant Influence ◽  
Membrane Surface ◽  
Surface Hydrophobicity ◽  
Anion Exchange Membranes ◽  
Amino Acid Solution

Hydration of heterogeneous cation-exchange membranes Fumasep FTCM and anion-exchange membranes Fumasep FTAM in hydrogen and hydroxyl forms, respectively, sorbing tyrosine as well as of the samples being used in electrodialysis concentration of tyrosine solution was studied using the methods of thermogravimetry and IR-spectroscopy. It was revealed that tyrosine sorption and membranes application in electrodialysis of this amino acid solution causes membranes hydration decrease. The decrease in membrane hydration after its contact with tyrosine leads to membrane surface hydrophobicity grow up and, consequently, make significant influence on amino acid’s mass transfer.

Intravenous Alimentation and Insensible Water Loss in Low-Birth- Weight Infants

PEDIATRICS ◽  
1979 ◽  
Vol 63 (4) ◽  
pp. 543-546
Author(s):  
Keith H. Marks ◽  
Timothy P. Farrell ◽  
Zvi Friedman ◽  
M. Jeffrey Maisels
Keyword(s):  
Amino Acid ◽  
Acid Solution ◽  
Water Loss ◽  
Caloric Intake ◽  
Constant Infusion ◽  
Fat Emulsion ◽  
Low Birth Weight Infants ◽  
Amino Acid Solution ◽  
Intravenous Fat Emulsion ◽  
Multiple Measurements

Insensible water loss (IWL) was measured in six premature infants, betWeen 4 and 21 days of age, by continuous weight monitoring on an electronic balance inside an incubator. Multiple measurements of IWL were made during the sequential infusion of 10% dextrose in 0.225% NaCl, 10% dextrose-amino acid solution, or 10% dextrose-amino acid and a commercial intravenous fat emulsion. Each solution was administered for three hours by constant infusion through a scalp vein needle. The order of the infusion was random and a 30-to 60-minute infusion with 5% dextrose water was given between each solution. During the infusion of 10% dextrose in 0.225% NaCl and 10% dextrose + amino acid solution, IWL was 1.0 ± 0.8 gm/kg/ hr and 1.1 ± 0.8 gm/kg/hr, respectively. In contrast, IWL increased significantly to 1.6 ± 0.7 gni/kg/hr when additional calories were given using the 10% dextrose-amino acid with the intravenous fat emulsion (P < .005). There was a positive correlation between caloric intake and IWL. These data suggest that parenteral nutrition solutions with intravenous fat emulsion are rapidly metabolized and the increase in IWL is probably secondary to an increase in thermogenesis.

Effect of Balanced Amino Acid Solution on Protein Metabolism after Surgery

1990 ◽  
Vol 17 (2) ◽  
pp. 100-103
Author(s):  
J. Figueras ◽  
E. Ramos ◽  
J.M. Llop ◽  
N. San-Juan ◽  
J. Marti
Keyword(s):  
Amino Acid ◽  
Acid Solution ◽  
Protein Metabolism ◽  
Amino Acid Solution

Effects of plasma amino acid and hormone levels on renal hemodynamics in humans

1988 ◽  
Vol 255 (3) ◽  
pp. F444-F449 ◽  
Author(s):  
P. Castellino ◽  
C. Giordano ◽  
A. Perna ◽  
R. A. DeFronzo
Keyword(s):  
Growth Hormone ◽  
Amino Acid ◽  
Acid Solution ◽  
Growth Hormone Secretion ◽  
Renal Hemodynamics ◽  
Time Sequence ◽  
Plasma Amino Acid ◽  
Base Line ◽  
Amino Acid Solution ◽  
Hormone Levels

The effect of plasma amino acid and hormone (insulin, glucagon, and growth hormone) levels on renal hemodynamics was studied in 18 healthy subjects. The following four protocols were employed: study 1, a balanced amino acid solution was infused for 3 h to increase plasma amino acid concentrations two to three times base line; study 2, the same amino acid solution was infused with somatostatin (SRIF) and infusions of insulin, glucagon, and growth hormone were concomitantly administered to replace the time sequence of increase in peripheral concentrations of these hormones as observed during study 1; study 3, the same amino acid infusion was administered with SRIF plus infusions of insulin, glucagon, and growth hormone to maintain plasma hormone concentrations constant at the basal level; study 4, SRIF was infused with insulin, glucagon, and growth hormone to reproduce the time sequence of increase of these hormones as observed in study 1; amino acids were not infused in this study. During study 1, glomerular filtration rate (GFR) and renal plasma flow (RPF) rose by 19 and 21%, respectively. During study 2 both the time sequence of and magnitude of rise in GFR and in RPF were similar to the changes observed during study 1. In studies 3 and 4 neither RPF nor GFR changed significantly from base line. These results indicate that 1) hyperaminoacidemia stimulates insulin/glucagon/growth hormone secretion and causes a modest rise in GFR and RPF; and 2) if hyperaminoacidemia is created while maintaining basal hormone levels constant or if plasma insulin/glucagon/growth hormone levels are increased while maintaining the plasma amino acid concentration at basal levels, neither RPF nor GFR rise.(ABSTRACT TRUNCATED AT 250 WORDS)

scholarly journals Influential Mechanism of Natural Organic Matters with Calcium Ion on the Anion Exchange Membrane Fouling Behavior via xDLVO Theory

Membranes ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 968
Author(s):  
Zhun Ma ◽  
Lu Zhang ◽  
Ying Liu ◽  
Xiaosheng Ji ◽  
Yuting Xu ◽  
...  
Keyword(s):  
Organic Matter ◽  
Interaction Energy ◽  
Anion Exchange ◽  
Natural Organic Matter ◽  
Calcium Ions ◽  
Membrane Fouling ◽  
Membrane Surface ◽  
Anion Exchange Membrane ◽  
Anion Exchange Membranes ◽  
Exchange Membrane

The fouling mechanism of the anion exchange membrane (AEM) induced by natural organic matter (NOM) in the absence and presence of calcium ions was systematically investigated via the extended Derjaguin–Landau–Verwey–Overbeek (xDLVO) approach. Sodium alginate (SA), humic acid (HA), and bovine serum albumin (BSA) were utilized as model NOM fractions. The results indicated that the presence of calcium ions tremendously aggravated the NOM fouling on the anion exchange membrane because of Ca-NOM complex formation. Furthermore, analysis of the interaction energy between the membrane surface and foulants via xDLVO revealed that short-range acid–base (AB) interaction energy played a significant role in the compositions of interaction energy during the electrodialysis (ED) process. The influence of NOM fractions in the presence of calcium ions on membrane fouling followed the order: SA > BSA > HA. This study demonstrated that the interaction energy was a dominating indicator for evaluating the tendency of anion exchange membranes fouling by natural organic matter.

Therapy of myocardial infarction with metabolic agents

1986 ◽  
Vol 67 (5) ◽  
pp. 325-328
Author(s):  
A. E. Vtorov ◽  
L. A. Leshchinsky ◽  
L. T. Pimenov
Keyword(s):  
Myocardial Infarction ◽  
Amino Acid ◽  
Connective Tissue ◽  
Acid Solution ◽  
Anabolic Steroid ◽  
Amino Acid Solution ◽  
Complex Therapy ◽  
Hospital Rehabilitation ◽  
Tissue Metabolites

The aim of the present work was to study in dynamics the concentration of connective tissue metabolites (free and peptide-bound oxyproline) in patients with myocardial infarction at different stages of in-hospital rehabilitation when using metabolic agents as part of complex therapy: free crystalline amino acid solution - alvesin-nova (GDR) in combination with the anabolic steroid retabolol.

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