BioRN: Technology (Topic)最新文献

{"title":"Institutional Logics and Technology Development: Evidence from the Wind and Solar Energy Industries","authors":"Suzanne G. Tilleman, M. Russo, Andrew J. Nelson","doi":"10.1287/orsc.2019.1320","DOIUrl":"https://doi.org/10.1287/orsc.2019.1320","url":null,"abstract":"The relationship between regionally tied institutional logics and the location of organizations is an important issue in organization theory. Recent work highlights how supportive regional logics c...","PeriodicalId":297421,"journal":{"name":"BioRN: Technology (Topic)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125439408","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}

{"title":"Towards the End of Plastic Era","authors":"Kashish Noor","doi":"10.2139/ssrn.3567440","DOIUrl":"https://doi.org/10.2139/ssrn.3567440","url":null,"abstract":"Plastic has become an integral part of modern life and plays a vital role in our everyday life. Though, it is very harmful material for the health of all life forms and poses serious environmental issues by being non-biodegradable. Plastic is responsible for water and land pollution and releases carbon dioxide and dioxins on burning, thus, contributes to global warming and air pollution. As of 2018, about 380 million tons of plastic was produced worldwide annually but only 9% has been recycled and another 12% has been incinerated. Awareness of the plastic problem has awakened new interest in the area of degradable polymers and utilization of microorganisms which helps in the biodegradation of plastics and polyethylene. Microbial enzymes are helpful in the biodegradation of plastic especially fungal ones. Various types of plastics, Polypropylene, Terephthalate, High Density Polyethylene, Polyvinyl chloride, Low Density Polyethylene, Polystyrene, Polycarbonate etc., are proven to be degraded by various microbial agents. Also, many biodegradable polymers are designed to degrade the organic and inorganic materials, starch, lignin etc., for example poly-hydroxyalkanoates (PHA) is a great biodegradable, biocompatible, thermoplastic synthesized by microorganism. This review paper outlines the current research & development on plastic biodegradation and bioplastic synthesis and attracts the attention towards the synthetic eco-friendly polymer technology.","PeriodicalId":297421,"journal":{"name":"BioRN: Technology (Topic)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123755342","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}

{"title":"Studies on Preparation, Characterization and Biodegradation Behavior of Hdpe Natural Polymers Blends","authors":"F. H. Jabrail, Alarqam Ziyad Taraq, K. Gupta","doi":"10.22587/ajbas.2018.12.3.1","DOIUrl":"https://doi.org/10.22587/ajbas.2018.12.3.1","url":null,"abstract":"Polyethylene (HDPE) is widely used in various applications due to its chemical, physical. and biological inertness but its durability presents a great challenge when it is released in the environment. To reduce its adverse effect on environment, currently various efforts are being made to modify its properties using naturally occurring biodegradable polymers but still these modifications found to be costly and required biodegradability in polyethylene is not yet achieved. Therefore, an attempt has been made to deveop biodegradable polyethylene blends using naturally occurring polymers. In this connection biodegradable high density polyethylene (HDPE) blends were prepared by thermally blending 2.0, 5.0 and 10.0 wt % amount of naturally occurring polymers such as; chitosan (CH), cellulose(CE), starch (ST), alginate (AL), pectin (PE), shellac (SH) and xanthan (XA). The observed biodegradabilility in HDPE blends might be due to the presence of hydrolysable linkages and stereo-favourable orientations of blended natural polymers. The added polymers have played a significant role in increasing the hydrophilicity in blended HDPE and acted as a bioassimilative nutrients for seeded microorganisms. The biodegradability of HDPE-polymer blends was evaluated in presence of various fungi such as; aspergillus niger, aspergillus terreus, fusarium solani, tricoderma hariziauum and tricoderrma viride. The disinfected films of pristine HDPE and polymer blened HDPE were inoculated with these fungi and the extend of biodegrdation was evaluated after a incubation period of three months at 28 ± 1˚C. The biodegradability of HDPE-polymer blends was compared with pristine HDPE by evaluating their molecular weights, and weight percent loss in samples incubated for three months along with selected fungus. The biodegrdation in pristine HDPE and its polymer blends was confirmed by comparing their FT-IR spectra and also by evaluating the variations in their mechanical and thermal properties. A significant variation in their morphologies in prsence of fungi has confirmed biodegradation in HDPE-polymer blends in comparison to pristine HDPE films. These studies have provided sufficient evidnces to confirm the role of added natural polymers in developing a biodegradable HDPE by blending various polymers such as chitosan (CH), cellulose(CE), starch (ST), alginate (AL), pectin (PE), shellac (SH) and xanthan (XA). Out of these polymers, the chitosan is found to be quite effective as it is acted better bioassimilative nutrient for microorganisms to cause biodegrdation of HPEF in comparison to other polymers.","PeriodicalId":297421,"journal":{"name":"BioRN: Technology (Topic)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133636949","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}