background: the effect of temperature and humidity on the maturation of toxocara cati eggs in an in vitro system was investigated. methods: suspensions of toxocara cati eggs, with 5% formalin/saline or 2.5% formalin/ringer were prepared and maintained at 37 °c under 40% humidity or at 25 °c under 98% humidity for 3 weeks for egg development. results: the suspension sample mixed by 2.5% formalin...

The permeability of K channels to various cations is studied in myelinated nerve. Ionic currents under voltage clamp are measured in Ringer solution containing tetrodotoxin and a high concentration of the test ion. Reversal potentials for current in K channels are determined and used with the Goldman-Hodgkin-Katz equation to calculate relative permeabilities. The ratios PTI:PK:PRb:PNH4 are 2.3:...

changes of body-weight are given show gains as well as losses. We have compared trends in the body-weights of thirty-seven Aberdeen primiparae who lactated for at least 10 weeks and thirty-five who lactated for not more than 3 weeks. A majority in both groups lost weight, but more in the breast-feeding group, in which the average loss was also greater. The women who lost most weight suffered mo...

SPITZER, ADRIAN, AND ERICH E. WINDHAGER. Efect of peritubular oncotic pressure changes on proximal tubular @id reabsorption. Am. J. Physiol. 218(4): 1188-l 193. 1970.-To evaluate directly the effect of changes in postglomerular capillary blood oncotic pressure on fluid reabsorption by proximal tubules of rat kidneys, an in vivo method of microperfusion of peritubular capillaries was devised. Ne...

OBJECTIVE In the present study, we aimed to determine the protective effect of the perfusion of the distal aorta with diltiazem and ringer lactate solution on the spinal cord. METHODS Twenty-seven New Zealand rabbits were used in which spinal cord ischemia was provided by occlusion of the aorta for thirty minutes. Experimental animals were divided into four groups: group A (n=4), the sham ope...

The permeability of K channels to various cations is studied in myelinated nerve. Ionic currents under voltage clamp are measured in Ringer solution containing tetrodotoxin and a high concentration of the test ion. Reversal potentials for current in K channels are determined and used with the Goldman-Hodgkin-Katz equation to calculate relative permeabilities. The ratios PTI:PK:PRb:PNH4 are 2.3:...

A calcium-free Krebs Ringer solution, supplemented with 1 mg/ml glucose, with or without 0.025% formalin, was used to dilute freshly collected ram semen on a 1:l basis. The treated semen was inseminated into the cervix of Merino ewes either within 60 minutes of collection or after storage at 5OC for 24 h. Although the Ringer-formalin diluent always caused complete immobilisation of the spermato...