نتایج جستجو برای: ethyl 0

تعداد نتایج: 604566  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گلستان - دانشکده علوم پایه 1392

نانوذرات مغناطیسی فریت نیکل- منگنز- مس عمدتأ در دارورسانی مغناطیسی، محیط های مغناطیسی ضبط داده ها، حسگرهای گازی، مدارهای فرکانس بالا و ذخیره اطلاعات و ... کاربرد فراوانی دارند. در این پایان نامه نانوذرات مغناطیسی فریت نیکل - منگنز - مس با درصدهای متفاوت جانشانی مس به جای منگنز به روش هم رسوبی شیمیایی تهیه شدند و خواص ساختاری، مغناطیسی و الکتریکی آنها مورد مطالعه و بررسی قرارگرفت. برای مشخصه یاب...

Journal: :Kansas Agricultural Experiment Station Research Reports 2021

Effective weed control prior to seeding is essential for proper turfgrass establishment since competition from weeds can cause sward fail. Herbicides with multiple active ingredients different chemical families could increase efficacy, but hinder the of newly seeded turf. Research trials were initiated in fall 2020 Olathe and Manhattan, KS, determine if tall fescue (Schedonorus arundinaceus) be...

Journal: :Journal of agricultural and food chemistry 2001
S Rocha V Ramalheira A Barros I Delgadillo M A Coimbra

The application of headspace solid phase microextraction (SPME) for flavor analysis has been studied. Headspace SPME sampling was tested for nine common wine flavor compounds in 10% (v/v) aqueous ethanol: linalool, nerol, geraniol, 3-methyl-1-butanol, hexanol, 2-phenylethanol, ethyl hexanoate, ethyl octanoate, and ethyl decanoate. The chemical groups (monoterpenoids, aliphatic and aromatic alco...

2015
BATOMAYENA BAKOMA BÉNÉDICTE BERKÉ KWASHIE EKLU-GADEGBEKU NICHOLAS MOORE

The root of Bridelia ferruginea is traditionally used as a treatment for type 2 diabetes. The objective of this study was to evaluate the effect of Bridelia ferruginea root bark ethyl acetate fractions (EA) on streptozotocin-induced diabetes and identify some chemical compounds. Ethyl acetate fraction (25 and 50 mg/kg/day) was administrated to streptozotocin-induced (60 mg/kg) diabetic mice for...

Journal: :The Journal of chemical physics 2004
Eunsook Kim Satoshi Yamamoto

The pure rotational spectrum of the ethyl radical (C2H5) has been detected for the first time with the Fourier transform millimeter-wave spectrometer. The ethyl radical is produced by discharging the C2H5I gas diluted in Ar. The 1(01)-0(00) rotational transition of the ethyl radical is observed in the frequency range from 43,680 to 43,780 MHz. The observed spectrum shows a very complicated patt...

Journal: :Advances in experimental medicine and biology 2017
F Hoffmeyer K Sucker H Berresheim C Monsé B Jettkant A Beine M Raulf J Bünger T Brüning

Acute effects of ethyl acrylate exposure at 5 ppm for 4 h include changes of pH in exhaled breath condensate (EBC-pH) and exhaled nitric oxide (FeNO). So far, few data have been reported for atopic persons or the impact of the exposure conditions on biomarkers, e.g., constant versus variable application of irritants. Nine atopic and eighteen healthy volunteers without bronchial hyperresponsiven...

Journal: :iranian journal of pharmaceutical sciences 0
fatemah atyabi department of pharmaceutics, faculty of pharmacy, tehran university of medical sciences, tehran, iran afsaneh mohammadi department of pharmaceutics, faculty of pharmacy, tehran university of medical sciences, tehran, iran rassoul dinarvand department of pharmaceutics, faculty of pharmacy, tehran university of medical sciences, tehran, iran

the purpose of this study was to prepare and characterize nimodipine loaded microspheres using ethyl cellulose (ec) as a carrier polymer through an emulsion solvent evaporation method. these evaluations characterized the pattern of drug release from prepared microspheres. nimodipin loaded microspheres were prepared using an emulsification solvent evaporation method. the effect of process variab...

Journal: :physical chemistry and electrochemistry 0

ethyl benzene used increasingly each year is the raw material of producing styrene monomer. this substanceis produced from benzene alkylation with ethylene or ethanol, depending on the availability and cost of rawmaterials. in this study benzene alkylation in the presence of ethanol in a catalytic fixed bed reactor inthree states of isotherm, adiabatic and non-isotherm-non-adiabatic is mathemat...

2005
Roger L. DeKock Iordan H. Hristov Grant D. W. Anderson Inigo Göttker-Schnetmann Stefan Mecking Tom Ziegler

The transition metal catalyzed ethylene polymerization in water suspensions has been increasingly successful in the last couple of years. Water, however, adversely affects the polymerization process by deactivating the catalyst in a Wacker-type reaction. The cationic Pd(II)-diimine Brookhart catalyst 1 is studied here by a combination of quantum mechanics and molecular mechanics to determine th...

2006
Vincent L. Wilson Ashis K. Basu John M. Essigmann Ruth A. Smith Curtis C. Harris

The "P-postlabeling procedure, developed originally by Randerath and coworkers, has been modified for the detection and analytical quantitation of O'-alkyl-2'-deoxyguanosine residues in DNA. Chromato graphie techniques were developed to resolve individually the normal deoxyribonucleotide-3'-monophosphates and the O'-alkyldeoxyguanosine-3'-monophosphates by high-pressure liquid chromatography. S...

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