Yield and composition characteristic of Citrus nobilis pectin extracted under acidic condition

2020 ◽  
Author(s):  
Eny Kusrini ◽  
Dwi Aprillia Wulandari ◽  
Anwar Usman ◽  
Nandy Putra ◽  
Nasruddin A. Abdulah
Keyword(s):  
Acidic Condition ◽  
Composition Characteristic

Accuracy Improvement When Determining Copper( II ) Ions With Zincon at Acidic Condition

2020 ◽  
Vol 41 (12) ◽  
pp. 1206-1210
Author(s):  
Yesol Lee ◽  
Ra Yun Kim ◽  
In‐Yong Eom
Keyword(s):  
Acidic Condition ◽  
Accuracy Improvement

Pillar[5]arene based supramolecular prodrug micelles with pH induced aggregate behavior for intracellular drug delivery

2015 ◽  
Vol 51 (14) ◽  
pp. 2999-3002 ◽  
Author(s):  
Yin Wang ◽  
Jianwei Du ◽  
Youxiang Wang ◽  
Qiao Jin ◽  
Jian Ji
Keyword(s):  
Drug Delivery ◽  
Acidic Condition ◽  
Ph Responsive ◽  
Intracellular Drug Delivery ◽  
Aggregate Behavior ◽  
Therapy Effect

A novel type of dual pH-responsive supramolecular prodrug micelles based on pillar[5]arene was prepared. It was found that the prodrug micelles could be aggregated upon acidic condition, which led to enhanced accumulation and better therapy effect.

Digestion and Digestive Enzymes in the Herring (Clupea harengus L.)

1935 ◽  
Vol 1 (3) ◽  
pp. 145-157 ◽  
Author(s):  
Helen I. Battle
Keyword(s):  
Intestinal Mucosa ◽  
Digestive Enzymes ◽  
Clupea Harengus ◽  
Acidic Condition ◽  
Pyloric Caeca ◽  
Temperature Range ◽  
Gastric Contents

Crustacean food is partially broken down and digested in the caecum of the stomach of the herring. It becomes more finely divided in the pyloric sac and consists of an oily chyme, intermingled with chitin, mucus and bacterial clumps in the pyloric caeca and intestine. The acidic condition of the gastric contents is probably instrumental in the reddening of chitinous food in the tract. Pepsin from the stomach and trypsin from the pyloric caeca increase in digestive power over a temperature range from 2.4 to 37.5 °C. The stomach secretes a protease (pepsin), a weak amylase, and possibly a weak lipase. The pyloric caeca secrete a strong protease (trypsin), a strong amylase, and a lipase rendered active by bile. The intestinal mucosa exhibits lipolytic and amylolytic ferments, while the bile has some amylolytic properties.

Inter-residue interactions in alpha-helical transmembrane proteins

2018 ◽  
Vol 35 (15) ◽  
pp. 2578-2584 ◽  
Author(s):  
Eduardo Mayol ◽  
Mercedes Campillo ◽  
Arnau Cordomí ◽  
Mireia Olivella
Keyword(s):  
Membrane Proteins ◽  
Present Report ◽  
Protein Structures ◽  
Transmembrane Proteins ◽  
Globular Proteins ◽  
Supplementary Information ◽  
Backbone Carbonyl ◽  
Composition Characteristic ◽  
Almost All ◽  
Residue Composition

Abstract Motivation The number of available membrane protein structures has markedly increased in the last years and, in parallel, the reliability of the methods to detect transmembrane (TM) segments. In the present report, we characterized inter-residue interactions in α-helical membrane proteins using a dataset of 3462 TM helices from 430 proteins. This is by far the largest analysis published to date. Results Our analysis of residue–residue interactions in TM segments of membrane proteins shows that almost all interactions involve aliphatic residues and Phe. There is lack of polar–polar, polar–charged and charged–charged interactions except for those between Thr or Ser sidechains and the backbone carbonyl of aliphatic and Phe residues. The results are discussed in the context of the preferences of amino acids to be in the protein core or exposed to the lipid bilayer and to occupy specific positions along the TM segment. Comparison to datasets of β-barrel membrane proteins and of α-helical globular proteins unveils the specific patterns of interactions and residue composition characteristic of α-helical membrane proteins that are the clue to understanding their structure. Availability and implementation Results data and datasets used are available at http://lmc.uab.cat/TMalphaDB/interactions.php. Supplementary information Supplementary data are available at Bioinformatics online.

Treatment of local scrubber wastewater for semiconductor by using photo-catalytic ozonation

2009 ◽  
Vol 59 (11) ◽  
pp. 2281-2286 ◽  
Author(s):  
Chung-Yi Chou ◽  
Chien-Pin Huang ◽  
Neng-Chou Shang ◽  
Yue-Hwa Yu
Keyword(s):  
Ion Exchange ◽  
Removal Efficiency ◽  
Removal Rate ◽  
Catalytic Ozonation ◽  
Acidic Condition ◽  
Buffer Solution ◽  
Toc Removal ◽  
Pre Treatment ◽  
Alkaline Buffer Solution

This study investigates the oxidation of local scrubber wastewater (LSW) from semiconductor manufacture by using ozonation, catalytic ozonation (ozone/Al2O3 and ozone/TiO2–Al2O3), and photo-catalytic ozonation (UV/TiO2–Al2O3, ozone/UV and ozone/UV/TiO2–Al2O3). The results show that catalyst Al2O3 and TiO2–Al2O3 promotes the TOC removal under the condition of neutral or alkaline buffer solution during catalytic ozonation of LSW. The Al2O3 induces highest promotion in TOC removal efficiency, which is higher than ozone alone by 26% TOC removal under alkaline buffer solution. However, TiO2–Al2O3 and Al2O3 cannot display the promotion in TOC removal under acidic condition. In addition, a pre-treatment of anion ion-exchange is employed and the result indicates that decreasing the anion ions concentration before AOPs can imply higher TOC removal during AOPs of LSW. In this study, ozone/UV under raw LSW acidic condition and ozone/Al2O3 under alkaline buffer solution present 95% and 88% TOC removal rate respectively and show the higher TOC removal efficiency than other AOPs. Therefore, these two kinds of AOP can serve as the very viable AOP methods in the LSW reclamation for semiconductor.

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