scholarly journals Вплив кластерних сполук ренію з органічними лігандами на активність глюкозооксидази

2011 ◽  
Vol 2 (1) ◽  
pp. 18-23
Author(s):  
Y. S. Voronkova ◽  
N. I. Shtemenko
Keyword(s):  
Enzymatic Activity ◽  
Cluster Compound ◽  
Compound Structure ◽  
Rhenium Compound ◽  
Hydrophobic Ligands ◽  
Compound Enzyme

Influence of cluster rhenium compounds with different ligands on the activity of glucoseoxidase was studied. Ability of the rhenium compounds to influence on the enzyme’s activity was ascertained. Itis depended on the compound structure and the time of incubation: activity of the glucoseoxidase changed by 4–24 %. The cluster compound with GABA ligand reduced the enzymatic activity, but compounds with hydrophobic ligands increased the activity of glucoseoxidase. Different mechanisms of the cluster rhenium compound–enzyme interactions are suspected.

A novel mixed platinumiron cluster compound: Structure of Triangulotetracarbonylironcarbonyltris(triphenyl phosphite)diplatinum

1972 ◽  
Vol 42 (2) ◽  
pp. C99-C101 ◽  
Author(s):  
V.G. Albano ◽  
G. Ciani ◽  
M.I. Bruce ◽  
G. Shaw ◽  
F.G.A. Stone
Keyword(s):  
Cluster Compound ◽  
Triphenyl Phosphite ◽  
Compound Structure ◽  
Iron Cluster

A Method for the Colorimetric Determination of β-Glucuronidase in Urine, Serum, Tissue; Assay of Enzymatic Activity in Health and Disease

1959 ◽  
Vol 36 (2) ◽  
pp. 193-201 ◽  
Author(s):  
Julius A. Goldbarg ◽  
Esteban P. Pineda ◽  
Benjamin M. Banks ◽  
Alexander M. Rutenburg
Keyword(s):  
Enzymatic Activity ◽  
Colorimetric Determination ◽  
Health And Disease ◽  
Urine Serum

Physiological and enzymatic activity of pepper seeds (Capsicum annuum) during priming

1991 ◽  
Vol 82 (3) ◽  
pp. 433-439 ◽  
Author(s):  
Patrick T. Smith ◽  
B. Greg Cobb
Keyword(s):  
Enzymatic Activity ◽  
Capsicum Annuum

Dimethylarginine dimethylaminohydrolase-1 transgenic mice are not protected from ischaemic stroke due to a ceiling effect of enzymatic activity in brain

2009 ◽  
Vol 36 (S 02) ◽  
Author(s):  
F Leypoldt ◽  
M Gelderblom ◽  
CU Choe ◽  
EC von Leitner ◽  
D Atzler ◽  
...  
Keyword(s):  
Transgenic Mice ◽  
Enzymatic Activity ◽  
Ischaemic Stroke ◽  
Ceiling Effect ◽  
Dimethylarginine Dimethylaminohydrolase

Isolation of Antithrombin III from Normal and α1-Antitrypsin-Deficient Human Plasma

1977 ◽  
Vol 38 (02) ◽  
pp. 0475-0485 ◽  
Author(s):  
Anna D. Borsodi ◽  
Ralph A. Bradshaw
Keyword(s):  
Enzymatic Activity ◽  
Isoelectric Focusing ◽  
Antithrombin Iii ◽  
Factor Xa ◽  
Antithrombin Activity ◽  
Bovine Trypsin ◽  
Normal Plasma ◽  
Antitrypsin Deficiency ◽  
Simplified Procedure ◽  
Stimulation Of

SummaryThe plasma of individuals, hetero- or homozygous for α1-antitrypsin deficiency, contains greatly decreased amounts of antithrombin activity as assayed against factor Xa. However, heparin stimulation of the residual antithrombin activity is observed, which is comparable to that of normal plasma. Antithrombins isolated from both normal and α1-antitrypsin deficient plasma by a simplified procedure are indistinguishable in both properties and yields. The microheterogeneity observed on isoelectric focusing of both preparations can be eliminated by treatment with neuraminidase. Neither purified human antithrombin nor α1-antitrypsin, when assayed against bovine trypsin, is stimulated by heparin. These results clearly establish the unique natures of antithrombin and α1-antitrypsin and show that about 75% of the antithrombin activity measured in normal plasma is due to α1-antitrypsin. Estimates of anti thrombin III activity in normal plasma by assays dependent on enzymatic activity can probably be obtained only in the presence of heparin.

Mechanism of Inhibitory Action on Platelet Activation of a Phospholipase A2 Isolated from Lachesis muta (Bushmaster) Snake Venom

1997 ◽  
Vol 78 (05) ◽  
pp. 1372-1380 ◽  
Author(s):  
André L Fuly ◽  
Olga L T Machado ◽  
Elias W Alves ◽  
Célia R Carlinis
Keyword(s):  
Platelet Aggregation ◽  
Enzymatic Activity ◽  
Phospholipase A2 ◽  
Inhibitory Activity ◽  
Thermal Inactivation ◽  
Anticoagulant Activity ◽  
Gel Filtration ◽  
Apparent Molecular Weight ◽  
Crude Venom ◽  
Lachesis Muta

SummaryCrude venom from Lachesis muta exhibited procoagulant, proteolytic and phospholipase A2 activities. A phospholipase A2, denoted LM-PLA2 was purified from L. muta venom to homogeneity, through a combination of chromatographic steps involving gel-filtration on Sephacryl S-200 HR and reverse phase chromatography on a C2/C18 column. LM-PLA2 presented a single polypeptide chain with an isoelectric point at pH 4.7 and apparent molecular weight of 17 kDa. Partial aminoacid sequence indicated a high degree of homology for LM-PLA2 with other PLA2 from different sources.LM-PLA2 displayed a potent enzymatic activity as measured by indirect hemolysis of red blood cells but it was neither lethal when injected i.p. into mice nor did it present anticoagulant activity. Furthermore, LM-PLA2 displayed a moderate inhibitory activity on the aggregation of rabbit platelets induced by low levels of ADP, thrombin and arachidonate. In contrast, platelet aggregation induced by high doses of collagen was strongly inhibited by LM-PLA2 as well as ATP-release. Treatment of the protein with p-bromophenacyl bromide or 2-mercapto-ethanol, as well as thermal inactivation studies, suggested that the platelet inhibitory effect of LM-PLA2 is dependent on its enzymatic activity. Thus, the platelet inhibitory activity of LM-PLA2 was shown to be dependent on the hydrolysis of plasma phospholipids and/or lipoproteins, most probably those rich in phosphatidylcholine. Surprisingly, lyso-phosphatidylcholine released by LM-PLA2 from plasma was shown to preferentially inhibited collagen-induced platelet aggregation, in contrast to other PLA2s, whose plasma hydrolytic products indistinctly affect platelet’s response to several agonists.

Degradation of 2,4-dichlorophenol by melamine amine celluloseimmobilized lacasses

TAPPI Journal ◽  
2017 ◽  
Vol 16 (10) ◽  
pp. 559-564 ◽  
Author(s):  
ZHEN WANG ◽  
PINGPING BIN ◽  
YING LIU ◽  
YU LIU ◽  
GUIHUA YANG ◽  
...  
Keyword(s):  
Enzymatic Activity ◽  
Removal Efficiency ◽  
Immobilized Laccase ◽  
Dialdehyde Cellulose

Epoxidized dialdehyde cellulose (EDC) was prepared and grafted with melamine to obtain melamine grafted epoxidized dialdehyde cellulose (EDC-melamine); the products were characterized by various methods and were used as carriers to immobilize laccase. Results show EDC-melamine can immobilize laccase effectively and have higher enzymatic activity compared with EDC. Furthermore, the enzymatic activity of EDC-melamine was found to be as high as 865 U•mg-1, compared with 140U•mg-1 for EDC. The removal efficiency of 2,4-dichlorophenol (2,4-DCP) for EDC-melamine immobilized laccase was about 71.5% at 40°C for 4 h at 10.0 mg•L-1 and dosage of laccase = 0.2 g/L. The removal efficiency can remain greater than 63%, even after six cycles.

A study on the Enzymatic Activity of some Alternaria Species and the Effect of some Environmental Factors in their Radial Growth

2013 ◽  
Vol 26 (1) ◽  
pp. 263-274
Author(s):  
Zainab Kh. Abdullah ◽  
Abdul-Hafiz Al-Duboon ◽  
Basil A. Abbas ◽  
Tawfik M. Muhsin
Keyword(s):  
Environmental Factors ◽  
Enzymatic Activity ◽  
Radial Growth ◽  
Alternaria Species

Unusual bonding pattern for formally divalent HgPPh3 fragment in a triangular HgRe2 cluster compound (Ph = phenyl)

1996 ◽  
Vol 211 (10) ◽  
Author(s):  
U. Flörke ◽  
H.-J. Haupt ◽  
R. Siefert
Keyword(s):  
Crystal Structures ◽  
Cluster Compound

AbstractThe crystal structures of (PPh

THE EFFECT OF BACTERIAL STRAINS ON THE ENZYMATIC ACTIVITY OF SOILS IN IMPACT ZONE OF ATAMAN LAKE

2020 ◽  
Author(s):  
V.V. Zinchenko ◽  
◽  
E.S Fedorenko ◽  
A.V Gorovtsov ◽  
T.M Minkina ◽  
...  
Keyword(s):  
Enzymatic Activity ◽  
Dehydrogenase Activity ◽  
Contaminated Soil ◽  
Model Experiment ◽  
Impact Zone ◽  
Bacterial Strains ◽  
The Impact

As a result of the model experiment, an increase in the enzymatic activity of meadow chernozem of the impact zone of Ataman Lake with the introduction of a strains mixture of metal-resistant microorganisms into the soil was established. The experiment has shown that the application of bacterial strains increases the dehydrogenase activity of contaminated soil by 51.8% compared to the variant without remediation

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