Solvent extraction of some lanthanides with 2,2,6,6-tetramethyl-3,5-heptanedione
نویسندگان
چکیده
منابع مشابه
Chemistry of 2,2,6,6,-tetramethyl-3,5-heptanedione (Hthd) modification of zirconium and hafnium propoxide precursors.
The modification of different zirconium propoxide and hafnium propoxide precursors with 2,2,6,6,-tetramethyl-3,5-heptanedione (Hthd) was investigated by characterization of the isolated modified species. The complexes [Zr(OnPr)3(thd)](2), [Zr(OnPr)(OiPr)2(thd)]2, Zr(OiPr)(thd)3, [Hf(OnPr)3(thd)]2, and Hf(OiPr)(thd)3 were isolated and characterized. The structure of the n-propoxide analogue of Z...
متن کاملextraction and acetylation of purified trypsin from bovin pancreas and study of some its physico-chemical properties
آنزیم تریپسین در شرایط قلیایی ناپایدار می باشد .و فعالیت پروتئولیتیکی تریپسین منجربه خود هضمی آن در جایگاههای خاصی می گردد. بنابر این آنزیمی با ناپایداری بالا محسوب میگردد. در سالهای اخیر موفق شدند که با ایجاد تغیرات شیمیایی با اضافه کردن فلزات خاص ، کلسیم و یا عمل استیلاسیون منجر به افزایش پایداری آنزیم تریپسین گردند. مطالعات در حال حاضر نشان می دهد که تریپسین استیله شده فعالیت آنزیمی خود را ...
15 صفحه اولPolymeric complexes of 2,5-Dihydroxy-1,4-benzoquinone with some Lanthanides
Polymeric solid complexes having distorted square antiprismatic geometries of La(III), Ce(III), Pr(III), Nd(III), Sm(III), Gd(III) and Dy(III) with 2,5-Dihydroxy-1,4benzoquinone are reported. Their compositions and geometries are supported by elemental analysis, IR spectroscopy, magnetic susceptibility measurements and electronic absorption spectroscopic studies.
متن کاملEffect of Solvent Extraction on Phenol, Flavonoids and Antioxidant Activity of some Iranian Native Herbs
Introduction: Nowadays, different solvents are used to extract plant antioxidants. Each solvent has a special ability to extract antioxidants materials. Accordingly, in this research, some medicinal herbs were collected from different vegetation zones of Iran and evaluated based on the majority of useful solvents. The best solvent for the extraction of antioxidants can be identified and used to...
متن کاملSynthesis of Thiazole Derivatives via Multicomponent Reaction of Tetramethyl thiourea using Water as a Safe Solvent
An efficient synthesis of 1,3-thiazole drivatives is described via a three component reaction isothiocyanates, tetramethyl thiourea and ethyl bromopyruvate.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Analytical Chemistry
سال: 1968
ISSN: 0003-2700,1520-6882
DOI: 10.1021/ac60268a009