Efficient production of furfural from xylose and wheat straw by bifunctional chromium phosphate catalyst in biphasic systems

2018 ◽  
Vol 175 ◽  
pp. 90-96 ◽  
Author(s):  
Siquan Xu ◽  
Donghui Pan ◽  
Yuanfeng Wu ◽  
Xianghai Song ◽  
Lijing Gao ◽  
...  
2019 ◽  
Vol 288 ◽  
pp. 121583 ◽  
Author(s):  
Alfonso Cornejo ◽  
Irantzu Alegria-Dallo ◽  
Íñigo García-Yoldi ◽  
Íñigo Sarobe ◽  
David Sánchez ◽  
...  

2017 ◽  
Vol 15 (12) ◽  
pp. 841-855
Author(s):  
Thanakorn SAENGSANGA ◽  
Wilailak SIRIPORNADULSIL ◽  
Surasak SIRIPORNADULSIL

The lipase-catalyzed hydrolysis of fat and oil is well recognized and considered to be an important reaction in fatty acid production. Generally, lipase activity is poor in oil-water biphasic systems. In this study, surfactins were purified, identified, and molecularly characterized from 2 biosurfactant-producing strains (Bacillus amyloliquefaciens E1PA and B. subtilis TISTR 1248). A high surfactin yield was achieved from B. amyloliquefaciens E1PA culture when 4 % (v/v) glycerol was used as a carbon source. Moreover, the addition of 2 % palm oil to the fermentation broth significantly increased biosurfactant production 2-fold during culture in Mineral Salt Medium (MSM). The biosurfactant synthesized by both strains was partially categorized as a lipopeptide via Fourier transform infrared spectroscopy (FTIR) analysis. The E1PA biosurfactant was subjected to analysis of its interfacial activation in the hydrolysis reaction. The poor hydrolytic activity (12.4 %) of lipase was significantly increased (97.3 %) when surfactin (1 % v/v) was used to generate the emulsion. In addition, the gene involved in B. amyloliquefaciens E1PA surfactin biosynthesis was characterized. The surfactin (sfp) gene was PCR amplified, and then cloning and expression of recombinant sfp was performed in Escherichia coli. Thus, heterogeneous expression of sfp gene in E. coli may be used for the efficient production of active recombinant E1PA surfactin. These results suggest that the lipopeptide biosurfactant produced by B. amyloliquefaciens E1PA could be useful as a biosurfactant in the oleochemical industry to produce fatty acids and/or fatty acid ethyl esters (biodiesel)


2020 ◽  
Vol 12 (12) ◽  
pp. 4-9
Author(s):  
Pavel A. BUTYRIN ◽  

The historical context in which the State Plan for Electrification of Russia (GOELRO) was developed, establishment of the GOELRO Commission, the GOELRO Plan content, the specific features of its implementation, and the role of the plan in the soviet period of Russia’s history are considered. Attention is paid to the electrification plants of other countries and territories of all inhabited continents, and to the participation of states in the electrification of countries and regions with small-scale and agricultural production in the 1920 s. The specific features pertinent to the electrification of the Russian Socialist Federative Soviet Republic are pointed out, namely, low starting conditions (in 1923, the energy consumption per capita in Russia was 100 times lower than that in Norway), its being state-owned in nature and revolutionary in its purpose: to get done with the main upheavals in the country and to shift the national economy for fore efficient production. The role of V.I. Lenin and G.M. Krzhizhanovsky, who were the initiators of the electrification of Russia, is analyzed in detail. A conclusion is drawn about the need to study both the GOELRO Plan itself and the specific features and circumstances of its implementation within the framework of training modern specialists in electrical engineering.


2019 ◽  
Vol 73 (2) ◽  
pp. 120-122
Author(s):  
Naoki Negishi ◽  
Katsuhiko Nakahama ◽  
Nobuyuki Urata ◽  
Toshiaki Tanabe

2013 ◽  
Vol 12 (11) ◽  
pp. 2117-2124 ◽  
Author(s):  
Mehwish Anis ◽  
Sajjad Haydar ◽  
Abdul Jabbar Bari
Keyword(s):  

2019 ◽  
Vol 52 (3) ◽  
Author(s):  
Ikram Ul Haq ◽  
Zinnia Mansoor ◽  
Ali Nawaz ◽  
Asad-Ur Rehman ◽  
Hamid Mukhtar
Keyword(s):  

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