Chemical Indentification of the Surface-active Material Isolated from Calf Lung

Surface-active Material in Fetal Lung Fluid Concentrated by Foaming.

A fluid has been demonstrated to flow from the trachea of fetal lambs1,2). By studies with the modified Wilhelmy balance the fluid has been found to have a very low surface tension when the surface area is compressed to 20% of its maximal size3). These findings are of particular interest since the fluid originates from the lungs and is aspirated with initial aeration. It is likely that the surf...

the effect of traffic density on the accident externality from driving the case study of tehran

در این پژوهش به بررسی اثر افزایش ترافیک بر روی تعداد تصادفات پرداخته شده است. به این منظور 30 تقاطع در شهر تهران بطور تصادفی انتخاب گردید و تعداد تصادفات ماهیانه در این تقاطعات در طول سالهای 89-90 از سازمان کنترل ترافیک شهر تهران استخراج گردید و با استفاده از مدل داده های تابلویی و نرم افزار eviews مدل خطی و درجه دوم تخمین زده شد و در نهایت این نتیجه حاصل شد که تقاطعات پر ترافیک تر تعداد تصادفا...

The dsRNA Electrophoretype of Some Isolated Iranian Calf Rotaviruses

A rapid and simple technique for diagnosis of rotaviral diarrhea is polyacrylamide gel electrophoresis (PAGE) of dsRNA extracted from fecal samples. To determine the electrophoretype of Iranian calf rotavirus, 23 rotaviral positive fecal samples from diarrheic Holstein calves at the age of less than one month in Tehran region were examined. The viral dsRNA was extracted with phenol-chloroform, ...

Development of a diploid cellline from fetal calf lung for virus vaccine production

mesuring the staff technology readiness, the case of a multi national chemical company operating in iran

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