نتایج جستجو برای: نمودار nmr

تعداد نتایج: 66950  

Journal: :Carbohydrate polymers 2010
Daniela Beccati Sucharita Roy Fei Yu Nur Sibel Gunay Ishan Capila Miroslaw Lech Robert J Linhardt Ganesh Venkataraman

The worldwide heparin contamination crisis in 2008 led health authorities to take fundamental steps to better control heparin manufacture, including implementing appropriate analytical and bio-analytical methods to ensure production and release of high quality heparin sodium product. Consequently, there is an increased interest in the identification and structural elucidation of unusually modif...

پایان نامه :دانشگاه بین المللی امام خمینی (ره) - قزوین - دانشکده فنی 1389

نتایج نمودار تشدید مغناطیس هسته ای ( (nmrبعد از کالیبراسیون با نتایج مطالعات مغزه، اطلاعات کاملی از تراوایی، حجم سیال آزاد و توزیع اندازه حفرات در اختیار مهندسین نفت قرار می‏دهد که در تعیین سطح تماس سیالات و پیش‏بینی رفتار آنها بسیار مفید می‏باشد. در مطالعه حاضر، قبل از بررسی خصوصیات پتروفیزیکی به دست آمده از این نمودار جهت اطمینان از کیفیت مناسب نمودارگیری، دو چاه از چاههای پارس جنوبی و یک چا...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 1998
javad sabounchei sadegh salehzadeh

195pt and 1h nmr has been used to show that addition of chlorine and bromine to [pt(cn)4]2_ in presence of perchloric acid in water results in cyanide and water scrambling with formation of eleven complexes of the type [pt(cn)4-ncl(h2o)n+1](n-1)+ (n=0, 1, 2, 3, 4). addition of nbu4oh to this solution gives (nbu4)2[pt(cn)4cl(oh)]. nmr measurements in acetone also show cyanide and hydroxyl group ...

Journal: :journal of physical & theoretical chemistry 2014
maryam mehdizadeh barforushi karim zare

the dopamine has been studied theoretically at the b3lyp/6-31g* level were performed in gasphase. we calculated physical parameters like atomic charges, energy (=>), asymmetry parameter(?), chemical shift @iso, dipole moment and isotropic nmr determinant and in this work we usedgaussian 03 at nmr and calculation by using b3lyp methods with 6-31g* basis set.

Journal: :journal of physical & theoretical chemistry 2014
jamileh shakibayifar karim zare

the methamphetamine has been studied theoretically at the mp2 [1]/6-31g[2] level in gas phase.methamphetamine has been investigated via nmr, frequencies calculation and nbo analysis. thestructure of methamphetamine was designed primarily using of chem. bio draw and it geometry hasbeen optimized at the mp2/6-31g computational level. the present work consists the study of themethamphetamine repor...

Journal: :Dalton transactions 2009
Bhaswati Ghosh Mukhopadhyay Suman Mukhopadhyay M Fátima C Guedes da Silva M Adília Januário Charmier Armando J L Pombeiro

Reactions of the aminoiminophenols 2-((2-(dimethylamino)ethylimino)methyl)phenol (HL(1)) or 2-{(3-(dimethylamino)propylimino)methyl}phenol (HL(2)) with nickel(II) chloride, K(2)[PtCl(4)] or copper(II) acetate in alcoholic solution, in the absence or in the presence of sodium azide, afford the corresponding new mononuclear complexes [M(L(1))(X)(H(2)O)(n)] [M = Ni, X = Cl(-), n = 2 (); M = Ni, X ...

Journal: :Journal of inorganic biochemistry 2008
Xianmei Shang Jingrong Cui Jizhou Wu Armando J L Pombeiro Qingshan Li

Series of polynuclear diorganotin(IV) complexes with di-halogenbenzohydroxamate ligands (substituents=2,4-Cl(2), 2,4-F(2), 3,4-F(2), 2,5-F(2), 2,6-F(2)), formulated as the polymeric [R(2)SnL](n)a (1:1) and the tetranuclear [R(4)Sn(2)(HL)(2)(L)](2)b (2:3) (HL=arylhydroxamate), were prepared and characterized by FT-IR, (1)H, (13)C, (119)Sn NMR spectroscopies, elemental analyses and melting point ...

ژورنال: :international journal of new chemistry 0

in this study, the drug atenolol on c60 fullerene were the drug and its derivatives were optimized fullerene. nbo and nmr for complex computations required in the hf/6-31g (d) and b3lyp/6-31g (d) quantum chemistry method was used. mechanical quantum calculations in theory level of b3lyp/6-31g were performed on structure of atenolol and nano fullerene atenolol with different positions of linking...

2008
Yu Lin Jiang Yu-Sheng Liu

0146-6380/$ see front matter 2008 Elsevier Ltd doi:10.1016/j.orggeochem.2008.06.006 * Corresponding author. Tel.: +1 423 439 6917; fa E-mail address: [email protected] (Y.L. Jiang). A new and convenient fluorescence spectroscopic method has been developed for the separation and determination of perylene in fossil wood recovered from a late Miocene to early Pliocene Gray Fossil Site in Tennessee, ...

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