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Antisickling activity of butyl stearate isolated from Ocimum basilicum(Lamiaceae)

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Asian Pacific Journal of Tropical Biomedicine 2014年第5期4卷 393-398页

作者： Dorothe Dinangayi Tshil Pius Tshimankinda Mpiana Damase Nguwo Vele Onyamboko Blaise Mavinga Mbala Koto-te-Nyiwa Ngbolua Damien Sha Tshibey Tshibangu Matthieu Kokengo Bokolo Kalulu Muzele Taba Teddy Kabeya Kasonga Faculté des Sciences B.P.190 Université de Kinshasa Institut Supérieur Pédagogique de la Gombe(ISP-Gombe)

Objective:To perform phytochemical analyses on the leaves of Ocimum basilicum L.(***),to elucidate the structure of isolate and then perform the antisickling activity on the crude extract and on the ***:The Emmel test performed on the acidified methanolic extract of this plant was used to evaluate the antisickling *** structure characterization of the active compound was performed using chromatographic techniques for the separation and the spectroscopic ones for structure elucidation(1H-NMR,***,HMBC).Resurte:The chemical screening on the crude extract revealed the presence of polyphenols(flavonoids,anthocyanins,leucoanthocyanins,tannins,quinones) alkaloids,saponins,triterpenoids and *** ohtained extract after evaporation yielded 34.50g(11.5%) out of 300g of powdered leaves of *** acidified methanolic extract and butyl stearate showed an interesting antisickling ***:The acidified methanolic extract and butyl stearate from *** displayed a good antisickling *** the best of our knowledge,this is the first time to report the antisickling activity of this compound in this *** synmesized compound presented the same spectroscopic characteristics than the natural one and the antisickling activities of its derivatives are understudying.

关键词： Sickle cell disease Antisickling plant Ocimum basilicum butyl stearate

A NEW PROCESS FOR THE EXTRACTION OF PENICILLIN G FROM THE FILTRATE OF FERMENTATION BROTH WITH TBP IN butyl ACETATE

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Chinese Journal of Chemical Engineering 1992年第1期 83-92页

作者：杨智发于淑秋陈宋镛刘守信周重慰 Institute of Chemical Metallurgy Academia Sinica Beijing 100080 North China Pharmaceutical Corporation Shijiazhuang 050015 Hebei

The mixture of neutral phosphorus esters and butyl acetate (BA) can be used, as the extractant for the extraction of penicillin G. The extraction equilibrium pH can be increased to pH3—4 due to the stronger extraction capability of the solvent mixture, instead of pH1.8—2.2 with butyl acetate as solvent. The experimental results indicate that the total recovery of penicillin G can reach 96.6% with the new extraction process, which is 5—6% higher than that obtained with the traditional process using BA as solvent at pH1.8—2.2.

关键词： solvent extraction penicillin G TBP butyl acetate

butyl Rubber Has a Bright Market Prospect in China

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China Chemical Reporter 2010年第21期21卷 30-31页

China lags behind in the development ofbutyl rubber. There were no butyl rubberplants in China until 1999,when SinopecBeijing Yanshan Petrochemical Companyimported Italian PI Company’s technologyand built what is still today China’s only45 000 t/a butyl rubber plant,which canproduce three kinds of general purpose *** 2000 on,the number of butyl rub-

关键词： rubber today Italian butyl Bright behind steadily

Effect of Hyoscine butyl Bromide on the Course of Labour

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Open Journal of Obstetrics and Gynecology 2018年第12期8卷 1102-1108页

作者： Dauda Deba Barau Eyaofun Teddy Agida Olatunde Onafowokan Francis Olayemi Adebayo Department of Obstetrics and Gynaecology University of Abuja Teaching Hospital Abuja-FCT Nigeria

Background: Hyoscine butyl bromide (Buscopan) is being used as an agent for reducing the duration of labour. There are however conflicting results on the effect of this agent on cervical dilation. Materials and Methods: This was an open label clinical trial of one hundred and thirty two (132) pregnant women in labour. Women were grouped to receive either 20 mg of hyoscine butyl bromide intramuscularly at the onset of active phase labour or placebo “Normal saline”. The main outcome measure was to compare the duration of first stage labour in the study and control groups as well as feto-maternal outcomes. Relevant data were collected using a proforma. The data were analysed using Statistical Package for Social Sciences (SPSS) version 20. Results: A total of 132 were randomised and 123 yielded for analysis. Of these 59 received hyoscine butyl bromide and 64 received placebo. There was no significant difference in the mean duration of active labour to second stage between the drug and placebo arms (312.5 versus 305.3 minutes, respectively, P = 0.788). The feto-maternal outcomes were similar between both arms. Conclusion: Hyoscine butyl bromide does not shorten the duration of labour in spontaneous labour. It also does not change feto-maternal outcomes.

关键词： Hyoscine butyl Bromide Labour Prolonged Labour

Zhejiang Xinhui Kicks off 50 000 T/A butyl Rubber Project

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China Chemical Reporter 2009年第2期20卷 22-22页

On December 22nd,2008 Zhejiang XinhuiSynthetic New Material Co.,Ltd.(ZhejiangXinhui)held a ground breaking ceremony onits first phase 50 000 t/a butyl rubber projectin Jiaxing,Zhejiang province.

关键词： ceremony rubber breaking butyl

Enzymatic Synthesis of butyl Ferulate by Silica-Immobilized Lipase in a Non-Aqueous Medium

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Journal of Biomaterials and Nanobiotechnology 2011年第4期2卷 400-408页

作者： Chandresh Chandel Ashok Kumar Shamsher S. Kanwar Department of Biotechnology Himachal Pradesh University

butyl ferulate was synthesized using a silica-immobilized commercial lipase (Steapsin) in dimethylsulfoxide (DMSO). Lipase-immobilized by surface adsorption onto silica pretreated with 1% glutaraldehyde showed 89% binding of protein. The esterification of butanol (100 mM) and ferulic acid (50 mM) by silica-bound biocatalyst was carried out at 45℃ for 6 h under shaking (120 rpm). The optimization of various reaction conditions like molar concentration of reactants, biocatalyst concentration, reaction time, temperature, addition of molecular sieves, salt ions, and repetitive bio-catalysis in DMSO were studied, consecutively. The bound lipase (15 mg/ml) catalyzed the esterification of ferulic acid and butanol with a yield of 64 mM under optimized reaction conditions. Among the salt ions Cu2+, Zn2+ and Al3+ ions moderately promoted the ester yield (66 mM) while Mg2+, NH4+, Fe2+ and Ca2+ were found to decrease the ester yield. The by-product (H2O) produced in the reaction was scavenged by the molecular sieves (10 mg/ml) added to the reaction mixture, which enhanced the formation of ester up to 74 mM. During the repetitive reactions, the bound lipase produced 32 mM ester after 4th cycle of esterification. On scaling-up the reaction volume to 30 ml, 32.5 mM butyl ferulate was synthesized under optimized conditions.

关键词： Silica Glutaraldehyde butyl ferulate Synthesis Molecular Sieves

Cautious Attitude in Decisions on Constructing butyl Rubber Units

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China Chemical Reporter 2009年第6期20卷 20-21页

作者： Zhang Aimin

Expansion of capacity Demand for butyl rubber in China has grown rapidly in recent *** apparent consumption of butyl rubber was 67 000 tons in 2002 and reached 214 000 tons in *** average annual demand growth was 26.1... 详细信息

关键词： rubber butyl apparent butadiene Lanzhou thousand n

Demand Up for butyl Rubber

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China Chemical Reporter 2008年第6期19卷 22-23页

作者： Cui Xiaoming

*** shortage According to the International Institute of Synthetic Rubber Producers(IISRP),output of butyl rubber has in creased *** output had aLready reached 39 800 tons in 2006,an increase

关键词： rubber creased shortage tires butyl thousand bottl

Business Unit butyl Rubber-Driving Success

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China Chemical Reporter 2008年第31期19卷 23-23页

作者： Ron Commander Business Unit butyl Rubber LANXESS AG

butyl rubber is a fascinating material withmany unique *** is one of thefew products in our portfolio that you *** are the one and only supplier to theglobal chewing gum *** this isnot the reason why my business unit isdoing the biggest investment in LANXESShistory,a new butyl rubber production plantin Singapore.I am going to tell you whySingapore is the right place for this site.

关键词： rubber supplier fascinating portfolio butyl thousa