Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Countercurrent Distribution”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 1,189 records · Page 66Linked to original sources
PubMedDate not supplied

Role of mesovarium and mesosalpinx in counter current exchange of hormones.

On the base of own studies with counter current transfer of steroid hormones and PGF2 alpha and the data taken from the literature it is suggested that two parts of broad ligament of the uterus i.e. mesovarium and mesosalpinx are not only morphological structures keeping the ovary, oviduct and ovarian vasculature, but that they may take part in hormonal regulation of the ovarian function.

Adnexa Uteri↗
PubMedDate not supplied

Counter current transfer of PGF2 alpha in the mesometrial vessels as a mechanism for prevention of luteal regression in early pregnancy.

A new concept has been presented on the mechanism protecting the corpus luteum during oestrous cycle, early pregnancy and pseudopregnancy induced by oestrogens. The concept is based on the recently discovered mechanism of back transfer of prostaglandin F2 alpha from the broad ligament vasculature into the uterus and on the participation of oestrogen in this process. The morphological facilitates for counter-current transfer of PGF2 alpha in the area of mesometrial vasculature and ability the uterus to bind PGF2 alpha were presented. It has been concluded that the process of PGF2 alpha back-transfer from mesometrial vasculature into the uterus may reduce in uterine venous blood the amplitude of PGF2 alpha pulses and by this way may reduce the penetration of prostaglandin into subovarian area and from there to the corpus luteum.

Adnexa Uteri↗
PubMed1988

[Study of the veins of the foot by counter-current phlebography].

83 CF phlebographies of the foot veins were carried out in varicose vein sufferers of both sexes in order to better understand the return venous circulation of the foot in detail, its abnormalities, and also to attempt to explain edema of the foot suffered by many varicose vein patients to varying degrees of severity after saphenous stripping. Films were obtained by direct needle puncture at different sites on the fore-foot, after a tourniquet was placed around the ankle. The route taken by the contrast medium injected was followed on a fluoroscop screen and photographed. Images obtained were classified under 4 headings: 1) slight, 2) moderate, 3) loaded and 4) overloaded opacification. In normal or slightly pathological cases (group 1 and 2), contrast medium was evacuated via a route ranging from level 1 (superficial) to level 3 (deep), this being the "usual evacuation circuit." In frankly pathological cases (groups 3 and 4), a "subsidiary evacuation circuit" may develop. It is also possible that after a degree of stagnation (by obstruction of the main veins of the foot) the contrast medium is very slowly evacuated by a number of small collateral veins. Edema of the foot as seen in some varicose vein patients as well as that which occurs post-operatively in the majority of patients undergoing varicose vein surgery is felt to be more often due to valve incompetence and to hypotonicity of the venous walls rather than to thrombosis of a deep vein of the foot.

Countercurrent Distribution↗
PubMed1985

[Process of gentamycin sorption in liquid- and solid-phase countercurrent flow].

The experimental data on sorption of gentamicin from model solutions in a continuous multisectional apparatus with a counter-current flow of liquid and solid phases are presented. Carboxylic cation exchange resins were used in the study. The effect of various parameters on gentamicin sorption was investigated and the rational process conditions were determined. The use of counter-current sorption for isolation of gentamicin from solutions was shown to be efficient.

Adsorption↗