The mechanisms responsible for mediating the influence of sperm preparation protocols on human sperm function have been investigated. Techniques that involved the separation of motile spermatozoa prior to centrifugation were found to yield sperm suspensions of highest quality. If the spermatozoa were centrifuged prior to isolation of the motile cells, sperm function was impaired. The detrimenta...

objective(s) herpes simplex viruses (hsvs) have widespread and ubiquitous prevalence in the human population and they have received a great deal of attention due to the range of diseases, they caused as a result of an infection. it seems that the fast and reliable diagnostic methods are needed for detecting the herpes simplex virus type 1 (hsv1) antibodies especially in patients with hsv enceph...

The world energy scene is undergoing a period of transition. As the inevitability exhaustion fossil fuels becoming increasingly intensive, efforts are exerted to find and use substitutes for energy. Bioethanol one most substitute renewable fuels, contributing reduction global warming effect negative environmental impact. production generally utilizes derivatives from food crops such as corn gra...

An exhaled breath sampler based on condensational growth and cyclone centrifugation (BSCC) was developed evaluated. The BSCC increases the size of aerosols through then collects them as liquid sample via centrifugation. This enables rapid collection eliminates certain pre-treatment steps for pathogenic microorganism analysis. Laboratory-generated were mixed with saturated water vapor to simulat...

A series of "winter" and "summer" Lucké kidney tumors of the frog (Rana pipiens) were homogenized and fractionated by differential centrifugation into nuclear, mitochondrial, and mitochondrial supernatant fractions. Winter tumors often contained high concentrations of herpesvirus, whereas no virus was observed in any of the summer tumors. The crude tumor fractions were further purified by rate-...

The effects of centrifugation of the infection of cell culture with bluetongue virus (BTV) were investigated. Baby hamster kidney cells were infected with BTV with or without centrifugation. Viral antigen was detected by immunofluorescence at 24 h in both centrifuged and noncentrifuged cultures. However, after 24 h of infection, the production of PFU in centrifuged cell cultures was 10- to 20-f...

A fluorescein-conjugated murine monoclonal antibody (MAb) reactive with cytomegalovirus (CMV) was evaluated for the detection of CMV in centrifugation culture. Of 188 specimens, 90 were positive for CMV in centrifugation culture. The fluorescein-conjugated MAb detected CMV in 86 of 90 (95%) specimens at 16 h postinoculation, and 88 of 90 (98%) were positive at 36 h. The fluorescein-conjugated M...

The compositions of the various organic and inorganic species in cane molasses show wide variations. Centrifugation can be used to remove suspended so!id particles. The bulk of these are precipitated calcium compounds. Removal of calcium by precipitation and subsequent centrifugation can be enhanced by the addition of sulphuric acid. The effects of dilution, temperature, and acid addition on th...

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By ultracentrifugation of 30 ml of highly dilute suspensions of herpes simplex virus (HSV) directly onto monolayer cultures grown in centrifuge tubes, infectivity was significantly greater than without centrifugation. Ultracentrifugation at 20,000 to 25,000 rpm (28,000 to 45,000 X g) for 1.5 to 2.3 h was utilized with good preservation of cultures. With low-speed centrifugation at 3,000 rpm (1,...