نتایج جستجو برای: borate

تعداد نتایج: 3395  

Journal: :Journal of the Ceramic Association, Japan 1986

2009
Helmut Härtner Stefan Schmitt Futong Cui Michael Barnes

Didecyl polyoxyethyl ammonium borate (DPAB), also known as Polymeric Betaine, was developed as a co-biocide for chromium-free copper based wood preservatives in Europe in the 1980’s. This paper summarizes the properties of DPAB as a wood preservative. Unique properties related to the betaine nature of DPAB are discussed in terms of the structureproperty relationship. Physical properties of DPAB...

Journal: :Applied and environmental microbiology 2007
M Helanto K Kiviharju M Leisola A Nyyssölä

L-Ribulose is a rare and expensive sugar that can be used as a precursor for the production of other rare sugars of high market value such as L-ribose. In this work we describe a production process for L-ribulose using L-arabinose, a common component of polymers of lignocellulosic materials, as the starting material. A ribulokinase-deficient mutant of the heterofermentative lactic acid bacteriu...

Journal: :Bioresource technology 2008
John Z Lu Xinfang Duan Qinglin Wu Kun Lian

Wood-polymer composites (WPC) have been extensively used for building products, outdoor decking, automotive, packaging materials, and other applications. WPC is subject to fungal and termite attacks due to wood components enveloped in the thermoplastic matrix. Much effort has been made to improve decay resistance of WPC using zinc borate and other chemicals. In this study, chitosan copper compl...

2015
M. Yildirim A. S. Kipcak F. T. Senberber M. O. Asensio E. M. Derun S. Piskin

Potassium borates, which are widely used in welding and metal refining industry, as a lubricating oil additive, cement additive, fiberglass additive and insulation compound, are one of the important groups of borate minerals. In this study the production of a potassium borate mineral via hydrothermal method is aimed. The potassium source of potassium nitrate (KNO3) was used along with a sodium ...

Journal: :Applied and environmental microbiology 2011
Jin-Geun Choi Yo-Han Ju Soo-Jin Yeom Deok-Kun Oh

The S213C, I33L, and I33L S213C variants of D-psicose 3-epimerase from Agrobacterium tumefaciens, which were obtained by random and site-directed mutagenesis, displayed increases of 2.5, 5, and 7.5°C in the temperature for maximal enzyme activity, increases of 3.3-, 7.2-, and 29.9-fold in the half-life at 50°C, and increases of 3.1, 4.3, and 7.6°C in apparent melting temperature, respectively, ...

Journal: :Environmental Health Perspectives 1994
D H Wegman E A Eisen X Hu S R Woskie R G Smith D H Garabrant

This study examined work-related chronic abnormality in pulmonary function and work-related acute irritant symptoms associated with exposure to borate dust in mining and processing operations. Chronic effects were examined by pulmonary function at the beginning and end of a 7-year interval. Time-specific estimates of sodium borate particulate exposures were used to estimate cumulative exposure ...

Journal: :Physical chemistry chemical physics : PCCP 2017
Faiz Ullah Shah Oleg I Gnezdilov Andrei Filippov

This study was focused on the investigation of ion dynamics in halogen-free, hydrophobic, and hydrolytically stable phosphonium bis(salicylato)borate [P4,4,4,8][BScB] ionic liquid electrolytes for lithium-ion batteries. The structure and purity of the synthesized ionic liquid and lithium bis(salicylato)borate Li[BScB] salt were characterized using 1H, 13C, 31P, and 11B NMR spectroscopy. The Li[...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2006
Yan Zhao Xingbin Yang Ru Jiang Xiaoli Sun Wenmin Liu Shengyong Zhang

The investigation on capillary electrophoretic enantioseparation of six synthetic compounds containing vicinal diol groups has been undertaken to acquire the optimum conditions using native beta-cyclodextrin (beta-CD) as chiral selector and borate as a background electrolyte. The separation was carried out in an uncoated capillary (58.5 cm x 75 microm i.d., effective length 48.5 cm) and the eff...

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