Abstract: Artificial Neural Network (ANN) techniques are applied to the control of coagulant dosing in a drinking water treatment plant. Coagulant dosing rate is non-linearly correlated to raw water parameters such as turbidity, conductivity, pH, temperature, etc. An important requirement of the application is robustness of the system against erroneous sensor measurements or unusual water chara...

angiogenesis or formation of new blood vessels from preexisting vasculature is a key process in some physiological conditions such as wound healing, growth, and action of female reproductive organs. moreover, disturbance of the mechanisms of physiological angiogenesis has a role in pathogenesis of some diseases in the form of overproliferation of blood vessels such as cancers, psoriasis, arthri...

OBJECTIVE To assess whether, as has been hypothesised since medieval times, acute fear can curdle blood. DESIGN Crossover trial. SETTING Main meeting room of Leiden University's Department of Clinical Epidemiology, the Netherlands, converted to a makeshift cinema. PARTICIPANTS 24 healthy volunteers aged ≤30 years recruited among students, alumni, and employees of the Leiden University Med...

Interactions between the vessel wall and platelets or leukocytes were traditionally thought to be separate cellular adhesive contributions to either coagulation or inflammation. Platelets, in response to vessel wall injury, adhere to components of the extracellular matrix (ECM), which triggers sudden platelet activation and platelet plug formation. Initial responses are followed by coagulant ac...

The effects of Russell’s viper venom on blood coagulation, platelets and fibrinolysis were studied after injecting MLD, 1⁄2 MLD and 1:10 MLD intramuscularly in rabbits. RVV was shown to be a strong coagulant in vivo resulting in thrombocytopenia, prolongation of PT, APTT, Thrombin Time and fall of fibrinogen levels. Process of intravascular clotting was very acute in animals receiving MLD and 1...

1. A substance has been isolated from the venom of the Okinawan pit viper (Trimeresurus okinavensis) that causes the aggregation of human blood platelets. The reaction resembles that between platelets and thrombin or connective tissue, in that the platelets release ADP. 2. The purified venom fraction is a protein-polysaccharide, and after Pronase digestion had mol.wt. 4x10(6), containing 10% pe...

p-Nitrophenyl-p’-guanidinobenzoate is a suitable substrate for the titration of purified bovine Factor X which has been activated by a coagulant protein from Russell’s viper venom. Reaction of Factor Xa with p-nitrophenyl-P’-guanidinobenzoate occurs at the site which is responsible for the clotting activity of Factor Xa. Activation of bovine Factor X by the Russell’s viper venom coagulant prote...

p-Nitrophenyl-p’-guanidinobenzoate is a suitable substrate for the titration of purified bovine Factor X which has been activated by a coagulant protein from Russell’s viper venom. Reaction of Factor Xa with p-nitrophenyl-P’-guanidinobenzoate occurs at the site which is responsible for the clotting activity of Factor Xa. Activation of bovine Factor X by the Russell’s viper venom coagulant prote...

The effects of factor IX concentrate therapy on hemostasis in hemophilia patients were studied by means of the radiometric factor IXa assay, the coupled amidolytic assay for factor VIIa, and coagulant assays for factors II, IX, and X, and antithrombin III. Both activated and unactivated concentrates contained factors VIIa and IXa, with the highest levels in the activated concentrates. Factors V...

OBJECTIVE Coagulation factor VIIa (VIIa) binding to its cellular receptor, tissue factor (TF), not only initiates the coagulation cascade but also induces cell signaling by activating G-protein coupled protease-activated receptors. The objective of the present study is to investigate the role of lipid rafts and caveolae in modulating TF-VIIa signaling and coagulant functions. METHODS AND RESU...