PROPERTIES OF CELLULOSE HYDROXAMIC ACID DERIVATIVE AND ITS METAL-CHELATING COMPLEXES

extraction 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 ...

Transition Metal Complexes of Peptide Derivatives Containing Chelating Side Chains

Antiradical, chelating and antioxidant activities of hydroxamic acids and hydroxyureas.

Reactive oxygen species, along with reactive nitrogen species, may play an important role in the pathogenesis and progress of many diseases, including cancer, diabetes and sickle cell disease. It has been postulated that hydroxyurea, one of the main treatments in sickle cell disease, achieves its activity partly also through its antioxidant properties. A series of hydroxyurea derivatives of L- ...

Synthesis, Spectral Studies and Antibacterial Activities of 8-Hydroxyquinoline Derivative and its Metal Complexes

1-(8-Hydroxy quinolin-2yl-methyl) thiourea ligand (HTF) was synthesized from 8-hydroxyquinoline and thiourea with formaldehyde by condensation method in N,N-dimethyl foramide medium. The metal complexes Zn(II), Cu(II), Ni(II) and Co(II) were prepared using the 1-(8-hydroxy quinolin-2yl-methyl) thiourea as ligand. The ligand and its metal complexes were characterized by elemental analysis, FT-IR...

Cyclobutadiene and Its Metal Complexes

The practical and theoretical problems associated with the cyclobutadiene molecule have concerned organic chemists for over one hundred years and, as is well known, this compound has played a particularly interesting role in the development of organic chemistry. The importance of the system to organic chemists stems mainly from the fact that the molecule is a cyclic conjugated system for which,...