To characterize the histomorphologic effects of cadmium on adult newt testes, male Iberian ribbed newts (6 months post-hatching) were intraperitoneally exposed to a single dose of 50 mg/kg of cadmium, with histologic analysis of the testes at 24, 48, 72, and 96 h. Beginning 24 h after cadmium exposure, apoptosis of spermatogonia and spermatocytes was observed, and congestion was observed in the...

BACKGROUND AND STUDY AIMS Balloon-assisted enteroscopy allows therapeutic intervention in the small bowel, and even of the biliopancreatic system in patients with altered anatomy. However, the conventional single-balloon enteroscope (SBE) has limited therapeutic use because of its small-caliber working channel and the lack of an additional water jet channel. The new single-balloon enteroscope p...

The knowledge of the mechanisms underlying circulating volume control may be achieved by stretching a balloon placed at the junction of the superior vena cava-right atrial junction (SVC-RAJ). We investigated whether the inflation of a balloon at the SVC-RAJ inhibits the intake of 0.3M NaCl induced by GABAA receptor activation in the lateral parabrachial nucleus (LPBN) in euhydrated and satiated...

Synchronization complicates the use of ultrasound in phonetics research, particularly with methods that incorporate video data of external reference points (e.g., [3, 4]). The challenge of a third stream is compounded in longer spans of data at higher than NTSC standard frame rates. As part of work toward developing high-speed ultrasound techniques for long spans of running speech, this paper p...

Stein, W.E. and Beck, C.B., 1992. New information on Bostonia pepTh'xa a n unusual member of the Calamopityaceae from North America. Rev. Palaeobot. Palynol., 72:73 102. A calamopityacean axis exhibiting multiple segments of primary xylem surrounded by secondary vascular tissue is analyzed here for its morphological and systematic significance. The plant is fundamentally protostelic with a deep...

Atrial mechanoreceptors, sensitive to stretch, contribute in regulating heart rate and intravascular volume. The information from those receptors reaches the nucleus tractus solitarius and then the paraventricular nucleus (PVN), known to have a crucial role in the regulation of cardiovascular function. Neurons in the PVN synthesize CRF, AVP, and oxytocin (OT). Stimulation of atrial mechanorecep...

A perfusion technique with a proximal occluding balloon has been used to study the absorption of glucose, sodium, and water from the human jejunum at different rates of flow. The absorption of glucose and water was significantly higher with the balloon deflated than inflated, probably because of reflux of infused solution above the point of infusion. Above the inflated balloon 0 to 4.2 ml/min o...

We develop numerical solutions of a theoretical model which has been proposed to explain the formation of subglacial bedforms. The model has been shown to have the capability of producing bedforms in two dimensions, when they may be interpreted as ribbed moraine. However, these investigations have left unanswered the question of whether the theory is capable of producing fully three‐dimensional...