Inhibition of Maillard reaction in production of low-molecular-weight chitosan by enzymatic hydrolysis

Publication date: Available online 21 February 2020Source: Carbohydrate PolymersAuthor(s): Jun Zhang, Zewen Mei, Xingxi Huang, Yueyue Ding, Yunxiang Liang, Yuxia MeiAbstractA low-molecular-weight chitosan (LMWC) sample was prepared by enzymatic hydrolysis, and used for investigation of special Maillard reaction products (MRPs) and factors affecting LMWC bioactivities. After undergoing MR, LMWC turned to brown color (termed BLMWC), showed reduction of several indices of rice growth promotion. This alteration of bioactivities was attributable to MRPs in BLMWC. A special MRP, 5-hydroxy-2-pyridine methanol isomer (5-H-2PMIS), was identified by HPLC and LC-MS. Analysis of key factors affecting MR, using this MRP as monitoring target compound and OD420 value, suggested that MR process can be minimized by storing LMWC under vacuum in a dry, low-temperature, neutral-pH environment. Na2SO3 was effective for inhibition of MR, at optimal concentration 0.5%. Chemical and FTIR analyses showed that Na2SO3-treated sample conformed to the Chinese National Standard of chitosan (GB 29941-2013). Control of MR is essential for application of LMWC in food, pharmaceutical, and other industries.Graphical abstract
Source: Carbohydrate Polymers - Category: Biomedical Science Source Type: research

Related Links:

Date: Thursday, 04 30, 2020; Speaker: Staff NIH Library; This class is presented as a webinar only; Videocast Event
Source: NIH Calendar of Events - Category: American Health Source Type: events
Date: Monday, 03 30, 2020; Speaker: R. Burke Squires, Mr., NIAID / OCICB / BCBB; Webinar Only; Videocast Event
Source: NIH Calendar of Events - Category: American Health Source Type: events
Date: Thursday, 04 02, 2020; Speaker: Staff NIH Library; This class is presented as a webinar only. ; Videocast Event
Source: NIH Calendar of Events - Category: American Health Source Type: events
Date: Thursday, 04 09, 2020; Speaker: Zeynup Gumus, Assistant Professor, Ichan School of Medicine at Mount Sinai; https://cbiit.webex.com/mw3300/mywebex/default.do?
Source: NIH Calendar of Events - Category: American Health Source Type: events
Date: Wednesday, 04 22, 2020; Speaker: Staff NIH Library; This class is presented as a webinar only. ; Videocast Event
Source: NIH Calendar of Events - Category: American Health Source Type: events
A group of moderately ill people were given hydroxychloroquine, which appeared to ease their symptoms quickly, but more research is needed.
Source: NYT - Category: American Health Authors: Tags: Coronavirus (2019-nCoV) Hydroxychloroquine (Drug) Drugs (Pharmaceuticals) Quarantines Shortages Autoimmune Diseases Pneumonia Immune System Malaria Schaffner, William your-feed-healthcare Source Type: news
A member of the Arkansas House said Wednesday he's tested positive for the coronavirus and state health officials reported two more people have died from the outbreak.
Source: Arkansas Business - Health Care - Category: American Health Source Type: news
Publication date: May 2020Source: Molecular Immunology, Volume 121Author(s): Lingmin Huang, Ruiheng Luo, Jing Li, Dan Wang, Yening Zhang, Liping Liu, Ningjie Zhang, Xueming Xu, Ben Lu, Kai Zhao
Source: Molecular Immunology - Category: Allergy & Immunology Source Type: research
Publication date: Available online 1 April 2020Source: Autoimmunity ReviewsAuthor(s): Klaus Wirth, Carmen Scheibenbogen
Source: Autoimmunity Reviews - Category: Allergy & Immunology Source Type: research
Publication date: Available online 1 April 2020Source: Analytic Methods in Accident ResearchAuthor(s): Mouyid Islam, Fred Mannering
Source: Analytic Methods in Accident Research - Category: Accident Prevention Source Type: research
More News: Biomedical Science | Carbohydrates | Chemistry | China Health | Environmental Health