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At least 1,099 records · Page 61Linked to original sources
PubMed1998

PNA molecular beacons for rapid detection of PCR amplicons.

The authors have developed a method for rapid detection of polymerase chain reaction (PCR) amplicons based on surface immobilized PNA-DNA hybrid probes ('molecular beacons') that undergo a fluorescent-linked conformational change in the presence of a complementary DNA target. Amplicons can be detected by simply adding a PCR reaction to a microtitre-well containing the previously immobilized probe, and reading the generated fluorescence. No further transfers or washing steps are involved. The authors demonstrate the specificity of the method for the detection of ribosomal DNA from Entamoeba histolytica.

Animals↗
PubMed1976

Induction of endogenous fibrinolysis inhibition in the dog. Effect of intravascular coagulation and release of free fatty acids.

Possible mechanisms underlying the development of fibrinolysis inhibition following trauma were studied. In order to investigate the role of intravascular coagulation dogs were subjected to infusions of thrombin or endotoxin, which both caused an increase in urokinase inhibitor activity in serum after 24 and 48 hours. The inhibitor increase following thrombin infusion was not, however, prevented by previous defibrinogenation with Defibrase or by induction of thrombocytopenia with antiplatelet serum, suggesting that neither platelets nor fibrinogen are necessary for the post-traumatic occurrence of fibrinolysis inhibition. In all groups subjected to infusion of thrombin an increase in plasma free fatty acids (FFA) was observed. The role of this increase for the development of fibrinolysis inhibition was tested by infusion of norepinephrine alone and in combination with nicotinic acid. Norepinephrine caused an increase of FFA after 2 hours and in urokinase inhibitor activity after 24-48 hours. Both of these were diminished by high doses of nicotinic acid, indicating that the release of FFA rather than intravascular coagulation might be the principal mechanism underlying the occurrence of fibrinolysis inhibition following trauma.

Animals↗
PubMed2002

Purification and characterization of a novel esterase promising for the production of useful compounds from Microbacterium sp. 7-1W.

A novel esterase catalyzing regioselective hydrolysis was purified from the membrane fraction of Microbacterium sp. 7-1W, and characterized. The enzyme was solubilized with Brij 58 and purified 13.8-fold to apparent homogeneity with 2.58% overall recovery. The relative molecular mass of the native enzyme as estimated by gel filtration was more than 600,000 Da, and the subunit molecular mass was 62,000 Da. The enzyme catalyzed cleavage of the terminal ester bonds of cetraxate esters and pantothenate esters. The K(m) and V(max) values for methyl cetraxate were 0.380 mM and 7.76 micromole min(-1) mg(-1) protein, respectively. The enzyme was inhibited by serine hydrolase inhibitors.

Actinomycetales↗