International Journal of Environment and Health Sciences最新文献_第5页

ROLE OF ACID HYDROLYSIS BEHAVIOR ON STRUCTURE AND DEPOLYMERIZATION OF LIGNIN EXTRACTED FROM RICE STRAW 酸水解行为对稻草木质素结构及解聚的影响

International Journal of Environment and Health Sciences Pub Date : 2020-09-30 DOI: 10.47062/1190.0203.01

Sumit Sharma, S. Sarma

{"title":"ROLE OF ACID HYDROLYSIS BEHAVIOR ON STRUCTURE AND DEPOLYMERIZATION OF LIGNIN EXTRACTED FROM RICE STRAW","authors":"Sumit Sharma, S. Sarma","doi":"10.47062/1190.0203.01","DOIUrl":"https://doi.org/10.47062/1190.0203.01","url":null,"abstract":"Chemical reactions mostly have a dependency on catalyst concentration. Sometimes, the action of higher concentration enhances the rate very high that disrupts the product appearance and structural integrity. It is also applicable for biological material degradation. Here in this study, the degradation of rice straw biomass was executed for lignin extraction using the acid hydrolysis treatment method. This technique helps in the removal of maximum cellulosic parts like cellulose and hemicellulose by converting them into soluble sugars and remains left out lignin. It was investigated that the higher concentration of sulfuric acid as 72% v/v (80.77% w/w) caused some structural changes in chemical bonds and formed highly condensed lignin (L-72). While mild concentration of sulfuric acid 63% v/v (72.26% w/w) does not have any adverse effect on lignin structural integrity and was found as free-form lignin (L-63). The impact of condensation was observed during the depolymerization of L-72 and L-63. The depolymerization efficiency of L-72 and L-63 in alkaline medium (NaOH 1.5% and Na2S 0.5%) comparatively lesser for L-72 (34%) than L-63 (98.3%) using lignin 2 g/l.FT-IR analysis also showed the presence of CO-O-CO (anhydride) and C=C (alkenes) in condensed lignin but not found in free-form lignin. This means the structural condensation decreasing the depolymerization efficiency of lignin. Hence, it is concluded that free-form, light- brown lignin should be used for depolymerization and monolignolextraction.","PeriodicalId":259276,"journal":{"name":"International Journal of Environment and Health Sciences","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132268889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

GROUNDWATER QUALITY ASSESSMENT FOR DRINKING PURPOSE IN SOUTH-EASTERN PART OF PANCHKULA CITY, HARYANA, INDIA 印度哈里亚纳邦panchkula市东南部饮用用地下水水质评价

International Journal of Environment and Health Sciences Pub Date : 2020-09-30 DOI: 10.47062/1190.0203.02

引用次数: 0

BIOCHEMICAL CONSTITUENTS OF MEDICINAL IMPORTANT COLEUS FORSKOHLII BRIQ. (PATHARCHUR), UNDER SOIL-MOISTURE STRESS CONDITION 药用重要花楸的生物化学成分。(patharchur)，在土壤水分胁迫条件下

International Journal of Environment and Health Sciences Pub Date : 2020-09-30 DOI: 10.47062/1190.0203.04

引用次数: 1

FRACTIONS OF HIPPOPHAE RHAMNOIDES TURKESTANICA EXTRACT AND THEIR ADAPTOGENIC AND IMMUNOMODULATORY POTENTIALS 土耳其沙棘提取物的组分及其适应性和免疫调节作用

International Journal of Environment and Health Sciences Pub Date : 2020-09-30 DOI: 10.47062/1190.0203.05

引用次数: 0

STUDIES ON CONSORTIUM OF MARINE OIL DEGRADING BACTERIA FOR DEGRADATION OF HIGH SPEED DIESEL (HSD) 海洋石油降解菌群降解高速柴油的研究

International Journal of Environment and Health Sciences Pub Date : 2020-09-30 DOI: 10.47062/1190.0203.03

引用次数: 1

ISOLATION OF FUNGUS FROM ROOTS OF WATER HYACINTH AND CELLULASE PRODUCTION BY THE MICROORGANISM FROM CARDBOARD WASTE 水葫芦根真菌的分离及废弃纸板微生物制纤维素酶的研究

International Journal of Environment and Health Sciences Pub Date : 2020-06-30 DOI: 10.47062/1190.0202.03

引用次数: 0

EXPLORING INDIAN TRADITIONAL MEDICINAL SOURCES AS PROPHYLACTIC STRATEGY AGAINST COVID-19 探索印度传统医药资源作为预防COVID-19的策略

International Journal of Environment and Health Sciences Pub Date : 2020-06-30 DOI: 10.47062/1190.0202.05

引用次数: 0

ISOLATION, IDENTIFICATION AND MOLECULAR CHARACTERIZATION OF SERRATIA MARCESCENS STRAIN NMRL65 AN OPPORTUNISTIC HUMAN PATHOGEN FROM THE SPOILED COCONUT 从变质椰子中分离的机会性人致病菌粘质沙雷菌nmrl65的分离、鉴定及分子特性研究

International Journal of Environment and Health Sciences Pub Date : 2020-06-30 DOI: 10.47062/1190.0202.02

引用次数: 2

BIO-SUCCINIC ACID: AN ENVIRONMENTFRIENDLY PLATFORM CHEMICAL 生物琥珀酸:一种环境友好的平台化学品

International Journal of Environment and Health Sciences Pub Date : 2020-06-30 DOI: 10.47062/1190.0202.01

Sumit Sharma, S. Sarma, S. Brar

{"title":"BIO-SUCCINIC ACID: AN ENVIRONMENTFRIENDLY PLATFORM CHEMICAL","authors":"Sumit Sharma, S. Sarma, S. Brar","doi":"10.47062/1190.0202.01","DOIUrl":"https://doi.org/10.47062/1190.0202.01","url":null,"abstract":"Global research for biomass-based products is swelling gradually due to depletion of fossil-based raw material as well as their negative effects on the environment. The hazardous chemical processes used for production of valuable industrial chemicals are directly responsible for environmental pollution. Therefore, use of alternative renewable resources as feedstock to produce such chemicals is gaining popularity. Succinic acid (SA) is platform chemical which can be used to produce bulk industrial chemicals with huge global demand such as adipic acid, 1,4-butandiol, maleic anhydride. Non-hazardous biological fermentation process can be used to produce succinic acid, which can be further converted to these chemicals. The bio-based approach uses CO 2 as supplement during the process and it replaces fossil-based raw materials; therefore, it is environment friendly. Mostly, pure sugars or sugars derived from crop residues or lignocellulosic materials are used to produce succinic acid. However, utilization of agricultural waste aromatic compounds to produce succinic acid has not been investigated in detail and not being implemented anywhere. Lignin waste management is a problem for the cellulosic bio-refineries and finding the way for its biological utilization is still in the stage of research and development. Unlike sugar metabolism, bioconversion of aromatic compounds is relatively complicated. Interestingly, bioconversion of agricultural waste aromatic compounds could be targeted towards production of succinic acid. The purpose of the present review is to highlight this possibility.","PeriodicalId":259276,"journal":{"name":"International Journal of Environment and Health Sciences","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122353090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

THE ADVERSE EFFECTS OF ENVIRONMENTAL NOISE EXPOSURE ON HEALTH 环境噪声暴露对健康的不利影响

International Journal of Environment and Health Sciences Pub Date : 1900-01-01 DOI: 10.47062/1190.0401.02

引用次数: 0