Viscometric characteristics of blood of the elephant, man, dog, sheep, and goat.
نویسندگان
چکیده
(7) was determined on plasma, serum, and Ringer suspensions of erythro-cytes from five mammalian species with different mean corpuscu-lar volume (MCV) : elephant 112 pa, man 90 p3, dog 74 pa, sheep 37 p3, and goat 18 p3. Samples with cell percentages (H) ranging from 5% to maximum packing were tested with a modified version of GDM viscometer at 37 C and shear rates ($ from 52 to 0.052 set-? In all species studied, plasma and serum behave as Newtonian fluids; but the rl of erythrocyte suspensions increases with rising H and reduced shear rate. The shear dependence in elephant, human, and dog erythrocyte suspensions is strikingly increased by the presence of serum proteins and further with the inclusion of fibrinogen. These proteins induce the interaction between cells and plasma (e.g., aggregation). With sheep and goat ervthrocytes, which do not form significant aggregation even in the 'presence of proteins, the addition of serum proteins and fibrinogen does not increase the shear dependence of suspension viscosity. In the absence of proteins, shear dependence in all species is not significantly increased until the direct interaction among cells (i.e., involving erythrocyte deformability) becomes enhanced with high H (above 65 %). The data suggest that the species difference in v is only partially due to the variations in MCV, but is more directly related to the interaction of cells with the suspending medium.
منابع مشابه
A Serological and Molecular study on Toxoplasma gondii infection in sheep and goat in Tabriz
Toxoplasmosis is an important zoonotic diseases in human and animals. The disease caused by the protozoan Toxoplasma gondii. To determine the infection rate of toxoplasmosis in sheep and goats in east Azarbaijan province of Iran a total of 186 sera, 13 fetal brains, 13 cotyledons and 34 whole blood samples were collected from sheep and goats in Tabriz abattoir during the year 2010. Serum sample...
متن کاملبررسی تأثیر خون های مختلف بر رشد عامل لیشمانیوز جلدی به روش in vitro
Abstract Introduction: As there is a high prevalence of cutaneous Leishmaniasis in Iran, the problems and expenses for culture of the parasite are important. The effect of different types of blood human, cattle, sheep and goat on growth of leishmania tropica promastigote, L.major were examined and compared with rabbit blood. This study was preformed during 2001-2003 in Kashan. Methods: This a...
متن کاملOn Bimolecular Layers of Lipoids on the Chromocytes of the Blood
We have examined the blood of man and of the rabbit, dog, guinea pig, sheep, and goat. There exists a great difference in the size of the red blood cells of these animals, but the total surfaces of the chromocytes See PDF for Structure from 0.1 cc. blood do not show a similarly great divergence, because animals having very small cells (goat and sheep) have much greater quantities of these cells...
متن کاملPrevalence of hydatid cyst in the slaughtered livestock in Sarpol Zahab and sero-epidemiology of human hydatidosis in this city in 2018
Background and Objective: Hydatid cyst is one of the most common parasitic diseases of humans and livestock, which is caused by the larval stages of the Echinococcus granulosus parasite. The disease is present in all parts of the world, including Iran, and it is important for health and economics. Therefore, the aim of this study was to investigate the prevalence of hydatid cyst in the slaughte...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- The American journal of physiology
دوره 217 3 شماره
صفحات -
تاریخ انتشار 1969