Measurements of fibrinogen concentration by use of two rapid methods (clot.weight method and th rombin-turbidity method) were compared with the reference thrombin.coagulation method of Ratnoff and Menzie [J. Lab. Clin. Med. 37, 316 (1951)]. Both rapid methods gave results (in the high, middle, and low ranges) that correlated well with those of the thrombin-coagulation method. However, the throm...

Turbidity reaction of blood scrum has been developed. The turbidity is formed by serum albumin and comes about when the serum is diluted with MC!LWAINE phosphate-citrate buffer in the range of pH 3.9—4.4. It is significantly enhanced by warming the solution. The temperature must not exceed the point of coagulation. The reaction is suitable as a screening-test of pathological anomalies of serum ...

A Nephelometric turbidimeter coupled with a data acquisition unit was used to measure turbidity every second. The standard deviation (SD) of the measured turbidity was proportional to the square root of the floc size; a greater SD indicated larger floc sizes. Than the image analysis (Matrox Inspector V2.2) was used to measure the mean particle size to confirm whether Nephelometric technology is...

Water quality data at 12 sites within an urban, a suburban, and a rural stream were collected contemporaneously during four wet and eight dry periods. The urban stream yielded the highest biochemical oxygen demand (BOD), orthophosphate, total suspended sediment (TSS), and surfactant concentrations, while the most rural stream yielded the highest total organic carbon concentrations. Percent wate...

MODIS medium-resolution (250and 500-m) bands were successfully used to detect and map the distribution of a harmful phytoplankton bloom (HAB) in the Paracas Bay, Peru, that caused economic losses estimated at about $28.5 million. A Red-Green-Blue combination of bands 1, 4 and 3 was used to visually distinguish the HAB while the turbidity index, a semi-quantitative measure of the amount of parti...

The effects of turbidity, size and the presence of conspecifics on the functional response, feeding latency and activity in the three-spined stickleback Gasterosteus aculeatus were examined. A significant interaction between standard length and presence of conspecifics demonstrated an increase in attack rates of larger individuals in the presence of conspecifics. Attack rate was also higher in ...

abstract study of turbidity current hydrodynamics plays an important role in increasing the economical life of dams though reduction in sediment accumulation. in the present experimental study, the effect of entrance densimetric froude number of turbidity current in sub and super critical conditions (fr =0.6-3.5) have been tested through effect of channel slope and change related to opening hei...

This work reports on the viability of the electroflocculation (EF) process for chemical oxygen demand (COD), turbidity and color removal from a raw effluent originated from a particular textile industry related to hemp manufacture. Firstly, the following operational parameters were optimized: current density; initial pH; electrolysis time; material of the electrode (iron, aluminum or iron-alumi...

Chlorine-resistant Cryptosporidium parvum oocysts in drinking water play an important role in the epidemiology of cryptosporidiosis. Current methods of detecting these organisms in water are insensitive, labor-intensive, highly subjective, and severely limited by sample turbidity. We describe here an alternative technique utilizing electrochemiluminescence (ECL) technology for detecting C. parv...