scholarly journals Selectivity coefficients of amino acids for the ammonium ion on a strong cation exchange resin.

1990 ◽  
Vol 54 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Tetsuya KAWAKITA ◽  
Tadako OGURA ◽  
Masaru SAEKI ◽  
Hideo HAYASAKI
Keyword(s):  
Amino Acids ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Ammonium Ion ◽  
Selectivity Coefficients ◽  
Strong Cation Exchange

Ion Exchange Method for Rapid Determination of Alkalinity of Water-Soluble Tea Ash Containing High Levels of Manganese

1980 ◽  
Vol 63 (3) ◽  
pp. 460-461
Author(s):  
Saidul Z Qureshi ◽  
Fadhil M Najib ◽  
Fahmi A Mohammed
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Exchange Resin ◽  
Rapid Determination ◽  
Cation Exchange Resin ◽  
Water Soluble ◽  
Exchange Method ◽  
Strong Cation Exchange ◽  
Ion Exchange Method

Abstract An ion exchange method to determine the alkalinity of water-soluble tea ash containing high levels of manganese is described. A chromatographic column containing a strong cation exchange resin (20–50 mesh) in Na+ form, with a bed volume of 5 mL is used. The present ion exchange method is compared to pH titrations and also to the official AOAC methods (31.012, 31.015, 31.016). Results with the new method are accurate and precise.

Kinetics of LIS-100 Cation Exchange Resin to Remove Reaction Substrate of Non-Enzymatic Browning in Clarified Apple Juice

2013 ◽  
Vol 699 ◽  
pp. 770-774
Author(s):  
Jian Hua Yi ◽  
Mei Li Li ◽  
Zhen Bao Zhu
Keyword(s):  
Amino Acids ◽  
Cation Exchange ◽  
Apple Juice ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Enzymatic Browning ◽  
Adsorption Parameters ◽  
Cation Exchange Resins ◽  
Exchange Resins ◽  
Dynamic Exchange

In order to inhibit non-enzymatic browning in clarified Fuji apple juice during storage, four kinds of cation exchange resins were compared for their abilities to exchange and remove amino acids, the reaction substrates of non-enzymatic browning in apple juice. The favorite resin, LSI-100, was screened to carry out static and dynamic adsorption experiments. The results showed that LSI-100 cation exchange resin had the best capacity for adsorption and removal amino acids. The equilibrium time of LSI-100 resin for amino acids was 3.5h.And the isotherm of LSI-100 resin could be described by Freundlich at 20°C. Additionally, the flow rates, temperature and concentrations of amino acids in apple juice affected the dynamic kinetic curves of LSI-100 cation exchange resin and the better dynamic exchange and adsorption parameters were as follows: flow rate 4BV/h, temperature 50°C,and amino acid concentration 30mg/100g apple juice.

scholarly journals A Semi-Automated Bone Pretreatment System and the Pretreatment of Older and Contaminated Samples

Radiocarbon ◽  
1989 ◽  
Vol 31 (03) ◽  
pp. 247-253 ◽  
Author(s):  
I A Law ◽  
R E M Hedges
Keyword(s):  
Amino Acids ◽  
Cation Exchange ◽  
Continuous Flow ◽  
Exchange Resin ◽  
Flow System ◽  
Cation Exchange Resin ◽  
Flow Cells ◽  
Continuous Flow System ◽  
New Process ◽  
Degree Of Purification

A semi-automated continuous-flow system used to process archaeological bone to purified gelatin or amino acids for 14C dating is described. Powdered bone is retained in flow cells specifically designed to permit the sequential leaching of the bone with acid, alkali and water. Crude collagen obtained by this process is gelatinized, and than either purified directly using a macroporous cation exchange resin (BioRad AGMP-50), or hydrolyzed and the amino acids desalted on BioRad 50W-X8 resin. When compared with previous methods used by the laboratory, the new method allows more samples to be treated to a higher degree of purification. Examples of dates obtained on “standard” bones are presented, and confirm that no contamination is introduced from the components used in the new process.

Kinetics of Adsorption of Thymopentin on a Gel-Type Strong Cation-Exchange Resin

2007 ◽  
Vol 66 (3-4) ◽  
pp. 231-235 ◽  
Author(s):  
Xin Li ◽  
Lei Zhang ◽  
Yonghui Chang ◽  
Shubao Shen ◽  
Hanjie Ying ◽  
...  
Keyword(s):  
Cation Exchange ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Kinetics Of Adsorption ◽  
Strong Cation Exchange ◽  
Kinetics Of
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