[Unusual aspect of duplication of the renal system].

Pyelo-ureteral duplication is often considered as having little clinical significance. This is not always true. An isolated superior segment of a dysplastic kidney may be at the origin of severe infections or abnormal urinary discharge.

Kidney and bladder pulsating activities during radioisotope renogram by computer data analysis.

This is a report of a new method in which the mathematical study of radioactivity changes in the bladder and kidney shows evidence of pulsating and vibratory activities. This study was done during radioisotope renogram with 99mTc DTPA. Spectral analysis of the recorded activities, taken 50 frames/sec and 1 frame every 10 sec by a scintillation camera connected to a computer, shows evidence of pulsating and vibratory activities of the kidney and the bladder.

II. Electrical measurements in the nanosecond range of the charge separation from chloroplasts spread at a heptane-water interface. Application of a novel capacitive electrode.

Spinach chloroplasts are spread at a heptane-water interface. Applying a novel capacitative electrode introduced in the preceding paper (Trissl, H.-W.

[Nephrotomy using in situ hypothermic perfusion. Apropos of a case].

The case of a 14 year old boy, suffering from severe bilateral nephrolithiasis, secondary to cystinuria, is presented. The progressive increase of the lithiasis, the dilatation of the excretory system of the right kidney and the painful passage of stones justified surgical removal of the staghorn stones on the right. The nephrolithotomy was performed under hypothermic perfusion of the kidney in situ, with section of the renal artery.

The plastoquinone pool as possible hydrogen pump in photosynthesis.

The function of the plastoquinone pool as a possible pump for vectorial hydrogen (H+ + e-) transport across the thylakoid membrane has been investigated in isolated spinach chloroplasts. Measurements of three different optical changes reflecting the redox reactions of the plastoquinone, the external H+ uptake and the internal H+ release led to the following conclusions: (1) A stoichiometric coupling of 1 : 1 : 1 between the external H+ uptake, the electron translocation through the plastoquinone pool and the internal H+ release (corrected for H+ release due to H2O oxidation) is valid (pHout = 8, excitation with repetitive flash groups). (2) The rate of electron release from the plastoquinone pool and the rate of proton release into the inner thylakoid space due to far-red illumination are identical over a range of a more than 10-fold variation.

Rectal bladder with dorsolateral, intrasphincteric submucosal pul through of the sigmoid colon in adult bladder cancer patients. Five years later.

Report on 12 adult bladder tumor patients with cystectomy, rectal bladder and dorsolateral, intrasphincteric pull through of the sigmoid and anal colostomy (Nédélec type). Voluntary control of feces and urine was found satisfactory by most patients although urinary continence at night was not perfect. The long-term prognosis with this form of urinary diversion in patients with bladder cancer was far from satisfactory: 4 patients died of recurrent carcinoma with terminal symptoms of sepsis, but 5 patients died from primary sepsis (and not cancer) from 3 months to 4 years after diversion.

Relations between the electrical potential, pH gradient, proton flux and phosphorylation in the photosynthetic membrane.

The transmembrane electrical potential (deltaphi), the proton flux (H+), the rate of electron transport (e), the pH gradient (deltapH) and the rate of phosphorylation (ATP) were measured in chloroplasts of spinach. Photosynthesis was excited periodically with flashes of variable frequencies and intensities. A new method is described for determining the rate of electron transport and proton flux.

Urethral responses to autonomic nerve stimulation.

Urethral contraction in response to cholinergic stimulation has been repeatedly proved and is a universally accepted fact. The adrenergic response is still disputed: (1) Is it a contraction or a relaxation, or a combination of both? (2) Where are the adrenergic receptors? Are they on the intrinsic urethral smooth muscles (with a biphasic response); in two different structures of the same organ (urethral and vascular smooth muscles); or on two anatomically different urethral smooth muscular units? Sympathomimetic and hypogastric nerve stimulation alone, as well as with pharmacologic blockade, showed that the contraction response to adrenergics is independent of the pelvic nerve and does persist even after urethral smooth muscle blockade by atropine, but is abolished after alpha blockade by phentolamine. The same contraction response, manifested in rise in intraurethral pressure, can be induced by pure vasoconstrictors.

On the extent of the electrical potential across the thylakoid membrane induced by continuous light in Chlorella cells.

The extent of the electrical potential delta phi(SS) across the thylakoid membrane of Chlorella cells was estimated under steady state conditions. This has been achieved by comparing the absorption change which occurs after continuous light is switched off with a calibrated field indicating absorption change induced by flash light. Under saturating light conditions delta phi(SS) is in the order of 100 mV.