Journal of The American Leather Chemists Association最新文献_第7页

Analysis of Process Safety and Occupational Health in Leather Process Industry: A Holistic Approach 皮革加工工业过程安全与职业健康分析:一个整体的方法

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-12-01 DOI: 10.34314/jalca.v116i12.4687

V. Sivakumar

引用次数: 1

Improving Tearing Resistance of Leather - Part 1 Prevention and Treatment of Low Tearing Strength in the Tannery 提高皮革的抗撕裂性。第1部分制革厂低撕裂强度的预防和处理

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-12-01 DOI: 10.34314/jalca.v116i12.4686

Ricardo A. Tournier, Fernando Lado

引用次数: 3

Changes to the Collagen Structure using Vibrational Spectroscopy and Chemometrics: A Comparison between Chemical and Sulfide-Free Leather Process 用振动光谱和化学计量学研究胶原蛋白结构的变化:化学和无硫化物皮革工艺的比较

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-11-01 DOI: 10.34314/jalca.v116i11.4659

Megha K. Mehta, Yang Liu, Rafea Naffa, M. Waterland, Geoff Holmes

{"title":"Changes to the Collagen Structure using Vibrational Spectroscopy and Chemometrics: A Comparison between Chemical and Sulfide-Free Leather Process","authors":"Megha K. Mehta, Yang Liu, Rafea Naffa, M. Waterland, Geoff Holmes","doi":"10.34314/jalca.v116i11.4659","DOIUrl":"https://doi.org/10.34314/jalca.v116i11.4659","url":null,"abstract":"Chemical and physical changes take place when hides and skins are processed to leather that affect the quality and strength of the material. Understanding the structure at each leather-making stage is the basis of this study but also intend to improve the process through a biochemical approach, employing a proteolytic enzyme for processing leather more cleanly with reduced environmental impact. Raman and ATR-FTIR spectroscopy in conjunction with chemometrics was used to investigate each leather-making stage from fresh green cattle hide to dry crust leather. The changes in proteins, lipids, nucleic acids and other biomolecules with leather processing was measured and reported using three novel Raman ratiometric markers, 920/1476, 1345/1259 and 1605/1476 cm-1, to discriminate the structural changes in collagen of hide using standard chemical and enzymatic method. Amide I band was deconvoluted to investigate thecollagen secondary structures using curve fitting by Gaussians function. The results of Principal Component Analysis are well-corroborated with the ratiometric markers of structural changes.","PeriodicalId":17201,"journal":{"name":"Journal of The American Leather Chemists Association","volume":"42 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77267774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Biosorption of Chromium from Spent Semi-Chrome Liquor: Part 1 Effective Pollution Abatement using Bacillus cerus 半铬废液中铬的生物吸附:第一部分:蜡样芽孢杆菌的有效污染治理

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-11-01 DOI: 10.34314/jalca.v116i11.4662

S. Kailasam, K. Balaji, S. Kanth

{"title":"Biosorption of Chromium from Spent Semi-Chrome Liquor: Part 1 Effective Pollution Abatement using Bacillus cerus","authors":"S. Kailasam, K. Balaji, S. Kanth","doi":"10.34314/jalca.v116i11.4662","DOIUrl":"https://doi.org/10.34314/jalca.v116i11.4662","url":null,"abstract":"The current study focuses on the isolation of Bacillus cerus from mangrove rhizosphere and its ability to treat semi-chrome process liquor of upper leathers. This strain has been identified by its molecular characteristics (16s rRNA sequencing) and confirmation has been obtained from neighbor joining tree. Minimum inhibitory concentration of the strain has been found to be 50 ppm. The growth pattern of this organism has been investigated in the presence of chromium, which showed the bacterial strain can grow luxuriantly at 50 and 100 ppm concentration of chromium. Biosorption study has been conducted at different concentrations (50, 100, 150, 200 and 250 ppm) of chromium. The biosorption capability of Bacillus cerus has been found to be 80.78, 73.19, 65.86, 59.44 and 39.27% for 50, 100, 150, 200 and 250 ppm respectively. Chromium sorption from the semi-chrome process liquor by Bacillus cerus has also been investigated, which showed a reduction of 76.15, 68.56, 61.63, 56.29 and 36.51% against 50, 100, 150, 200 and 250 ppm of chromium. Sorption characterization has been carried out by FTIR (Fourier Transform Infra-Red spectroscopy) and SEM (Scanning Electron Microscopy) analyses and the results confirmed the presence of sorption of chromium in Bacillus cerus.","PeriodicalId":17201,"journal":{"name":"Journal of The American Leather Chemists Association","volume":"56 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86040737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Typical Defects of Natural Phospholipid Fatliquors in Leather Industry and Their Solutions 天然磷脂加脂剂在皮革工业中的典型缺陷及其解决方法

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-11-01 DOI: 10.34314/jalca.v116i11.4663

Zhi-Kua Chen, Tao Luo, Xu Zhang, B. Peng, Chunxiao Zhang

{"title":"Typical Defects of Natural Phospholipid Fatliquors in Leather Industry and Their Solutions","authors":"Zhi-Kua Chen, Tao Luo, Xu Zhang, B. Peng, Chunxiao Zhang","doi":"10.34314/jalca.v116i11.4663","DOIUrl":"https://doi.org/10.34314/jalca.v116i11.4663","url":null,"abstract":"Leather made with soybean phospholipid fatliquors is prone to problems such as yellowing, elevated hexavalent chromium content, and undesirable odor. In this study, the aforementioned typical defects of soybean phospholipid fatliquors were investigated in respect to the main components, the antioxidants and the unsaturation degree of the natural soybean phospholipid. The results showed that the oxidation of soybean phospholipid is the primary source for its yellowing, elevated hexavalent chromium content, and undesirable odor. The volatile aldehydes produced by lipid oxidative rancidity are the main components of the undesirable odor. The purification of natural soybean phospholipid through removing the non-phospholipid components cannot solve the problems caused by oxidation of phospholipid. Furthermore, as a typical natural antioxidant existing in natural soybean phospholipid, tocopherols can restrain the oxidation of phospholipid to a certain degree, however, the dissolving out and destruction of tocopherols at high temperature in the phospholipid purification process can lead to more obviously oxidation of phospholipids. Additionally, the oxidation defects of phospholipid cannot be completely resolved by adding extra tocopherols, even at high dosages. The research finds that the defects of soybean phospholipid fatliquors can be thoroughly solved by increasing the saturation degree of lipid through addition reaction, the suggested iodine value of phospholipid products is lower than 20 g I2/100 g.","PeriodicalId":17201,"journal":{"name":"Journal of The American Leather Chemists Association","volume":"103 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74998201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluation of Antifungal Activity of Carbonate Solvent – Part:1 碳酸盐溶剂抗真菌活性的评价——第1部分

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-11-01 DOI: 10.34314/jalca.v116i11.4661

M. Sathish, D. Seeniammal, R. Poornima, J. Rao

引用次数: 0

Fabrication of Composite Films Based on Chitosan and Vegetable-Tanned Collagen Fibers Crosslinked with Genipin 壳聚糖与植物鞣胶原纤维交联制备复合膜

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-10-01 DOI: 10.34314/jalca.v116i10.4616

Jie Liu, Yanchun Liu, E. M. Brown, Zhengxin Ma, Cheng‐Kung Liu

{"title":"Fabrication of Composite Films Based on Chitosan and Vegetable-Tanned Collagen Fibers Crosslinked with Genipin","authors":"Jie Liu, Yanchun Liu, E. M. Brown, Zhengxin Ma, Cheng‐Kung Liu","doi":"10.34314/jalca.v116i10.4616","DOIUrl":"https://doi.org/10.34314/jalca.v116i10.4616","url":null,"abstract":"The leather industry generates considerable amounts of solid waste and raises many environmental concerns during its disposal. The presence of collagen in these wastes provides a potential protein source for the fabrication of bio-based value-added products. Herein, a novel composite film was fabricated by incorporating vegetable-tanned collagen fiber (VCF), a mechanically ground powder-like leather waste, into a chitosan matrix and crosslinked with genipin. The obtained composite film showed a compact structure and the hydrogen bonding interactions were confirmed by FTIR analysis, indicating a good compatibility between chitosan and VCF. The optical properties, water absorption capacity, thermal stability, water vapor permeability and mechanical properties of the composite films were characterized. The incorporation of VCF into chitosan led to significant decreases in opacity and solubility of the films. At the same time, the mechanical properties, water vapor permeability and thermal stability of the films were improved. The composite film exhibited antibacterial activity against food-borne pathogens. Results from this research indicated the potential of the genipin-crosslinked chitosan/VCF composites for applications in antimicrobial packaging. ","PeriodicalId":17201,"journal":{"name":"Journal of The American Leather Chemists Association","volume":"45 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86320928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Role of Anionic Chromium Species in Leather Tanning 阴离子铬在皮革制革中的作用

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-10-01 DOI: 10.34314/jalca.v116i10.4618

Abhinandan Kumar, J. Alla, Deepika Arathanaikotti, J. Raj, N. K. Chandrababu

引用次数: 0

Solid State NMR Analysis for Hide Powder Tanned by Aluminum, Silicon and Phosphorus Tanning Agents before and after Hydrothermal Denaturation 水热变性前后铝、硅、磷鞣剂鞣制兽皮粉的固体核磁共振分析

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-10-01 DOI: 10.34314/jalca.v116i10.4615

J. Liu, D. He, Cheng Hualin, K. Ding

引用次数: 0

Avoiding the Production of Polluting and Toxic Chemicals in the Tanning Process 避免在制革过程中产生污染和有毒化学品

IF 0.9 4区工程技术

Journal of The American Leather Chemists Association Pub Date : 2021-10-01 DOI: 10.34314/jalca.v116i10.4617

J. Morera, E. Bartolí, Patricia Rojas, L. Cabeza

{"title":"Avoiding the Production of Polluting and Toxic Chemicals in the Tanning Process","authors":"J. Morera, E. Bartolí, Patricia Rojas, L. Cabeza","doi":"10.34314/jalca.v116i10.4617","DOIUrl":"https://doi.org/10.34314/jalca.v116i10.4617","url":null,"abstract":"Polluting and potentially toxic chemicals are used in tanning. Sodium sulfide/hydrosulfide are used when the hides are unhaired. These chemicals can be transformed into hydrogen sulfide with a simple change of pH. This gas is highly toxic and is the recurring cause of many deaths and accidents due to suffocation of workers in tanneries around the world. The basic salts of chromium III are the most used chemical to tan. The chromium III used can be transformed by oxidation, even once the leather transformed into a consumer good (shoes, for example), in chromium VI, which is carcinogenic. Both chemicals are present in process floats, in residual floats and in solid waste generated. Chromium III is also present in manufactured leathers. This article aims to describe the problems associated with the use of the aforementioned hazardous materials and deepen the possibility of using less toxic alternative processes to tan. The designed process allows to significantly reduce the pollutant load of the discharged wastewater, facilitates the reuse of the solid waste generated and clearly improve the safety of people at work.","PeriodicalId":17201,"journal":{"name":"Journal of The American Leather Chemists Association","volume":"2006 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86959893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0