cloud point extraction and spectrophotometric determination of trace quantities of cadmium in some vegetables have been developed. the research area for vegetables analysis was near to the zarin shahr where the soil received heavy metals from the esfahan steel company. cloud point extraction used dithizone as complexing agent and non ionic surfactant triton-x114 as micellar phase. several impor...

a simple, sensitive and rapid method for determination of trace amounts of nitrite ion in real samples is reported. the reaction is initiated by adding known volumes of a nitrite ion solution of identified concentration to acidic solutions of thionine which causes decolorizaiton of reagent with time. the absorbance changes is then monitored spectrophotometrically at lmax = 602nm at 25 °c. calib...

The results obtained by radial haemolysis in the detection of antibodies to rubella virus compared well with those obtained by haemagglutination inhibition. Radial haemolysis is unaffected by non-specific inhibitors. The sera do not therefore require pretreatment and the results are less equivocal. Radial haemolysis appears to be as sensitive as immunofluorescence and floatation centrifugation....

Aim: To study the prevalence of gastrointestinal parasites in sheep and goats of Mathura region. Materials and Methods: A total of 240 faecal samples collected from three different farms were examined by direct smear, Willi's floatation and sedimentation techniques. Quantitative examination was done by McMaster's technique. Results: Out of 240 samples processed 165 samples were found positive f...

Among the energy targets of Vietnamese government, solar is expected to become main source renewable in future. Solar moving forward, with Vietnam outstripping Thailand and becoming country that installed largest capacity power generation Southeast Asia, reaching 16,362 MW new installations December 2021. In this study, we have experimentally analyzed designed a 47.5 grid-connected photovoltaic...

Rehabilitation as a process of return to fitness should take place at every stage the disease. Stimulation restore lost motor function all day, including when lying in bed or transferring from one position another. Placement items are an indispensable component restoring floatation, well element nursing patient. By correct arrangement patient we affect stimulatory nervous system. Thanks prevent...

Zero, first and second order derivative spectrophotometric methods were developed for the determination of insulin. The standard solutions and pharmaceutical sample were prepared in 0.01 M HCl. Absorbences of insulin were measured at 276 nm for the zero order by measuring height of peak from zero, at 264, 277 and 284 nm for the first order and at 277, 280, 283 and 289 nm for second order deriva...

Food-handlers (n = 1500) attending the public health laboratory in Khartoum, Sudan, for annual check-ups were screened for intestinal parasites by 3 different techniques (direct faecal examination, formol-ether concentration and floatation) to evaluate the adequacy of annual screening. Results showed that 29.4% of food-handlers were harbouring intestinal protozoa in stool samples: Entamoeba col...

Several physical effects allow free floatation of solid and even liquid matter. Materials may be levitated by a jet of gas, by intense sound waves, or by beams of laser light. In addition, conductors levitate in strong radio-frequency fields, charged particles in alternating electric fields, and magnets above superconductors or vice versa. Although levitation by means of ferromagnets is unstabl...