T he estrus cycle of rats and hamsters is regulated by the daily light-dar k cycle . The suprachiasmatic nucleus of the hypothalamus appears t o generate a rhythm with a frequency of approximately one cycle in 24 hours . This rhythm is exactly synchronized with the external light-dark cycle b y impulses received from the eyes through a retinohypothalamic projection . Lesions that destroy the su...

We examined the mechanism of the time- and protein synthesis-dependent decline in cardiac mechanical function in isolated working rat hearts. Hearts were perfused with Krebs-Henseleit buffer for 120 min in the presence or absence of the protein synthesis inhibitor cycloheximide (CX; 10 μM). Cardiac work remained stable for 60 min and then spontaneously decreased during 60-120 min of perfusion. ...

The presented results, concerning the features of the solar wind plasma structure as observed by spacecraft upstream of Earth, could be used for development of middle-term forecasts of magnetic storms. We have analyzed 1-hour data for 1995-2005 and a whole year of 1-min data during solar minimum (1995) and during solar maximum (2000) with 48 and 60 storms, respectively. The long-term statistica...

and Implications Chinese Meishan and Yorkshire were used to investigate mechanisms regulating the production and secretion of relaxin, progesterone, prolactin (PRL), and growth hormone (GH) during late pregnancy and lactation. Uterine surgical removal (hysterectomy) of nongravid gilts during the estrous cycle (day 8) extends luteal function to 150 days which is beyond the duration of normal pre...

objective: since bread is the main source of food in iran, we aimed to assess the effect of four types of iranian breads on metabolic and cardiovascular responses before and during 15, 30, 60, 90, 120 and 180 minutes of consumption in type 2 diabetic patients. materials and methods: ten type 2 diabetic patients (6 women and 4 men) with mean age of 51 ± 9.8 years and mean bmi of 31.9 ± 1.19 kg/m...

We study the control of modulational instability and pattern formation in a nonlinear dissipative feedback system with a periodic modulation of the material refractive index. We use a one-dimensional photonic lattice in a single-mirror feedback configuration and identify three mechanisms for pattern control: bandgap suppression of instability modes, periodicity induced pattern modes, and orient...

We present some numerical results obtained from a simple individual-based model that describes clustering of organisms caused by competition. Our aim is to show that, even when a deterministic description developed for continuum models predicts no pattern formation, an individual-based model displays well-defined patterns, as a consequence of fluctuation effects caused by the discrete nature of...

The selectivity of two types commercial fishing gear (crab hoop/traditional and rigid rectangular cage traps) targeting blue crabs (Callinectes arcuatus) in Cuyutlan Lagoon, Mexico, was assessed. effect soak time on crab catches versus the retention escape rate organisms also evaluated. Results suggested that traps captured larger individuals than hoops. carapace width significantly different b...

The modulating effects of ascorbic acid (AA), vitamin E (E), and a combination of AA and E (AA + E) against eight-hour road transportation stress were investigated in 120 pullets during the hot-dry season. The result obtained showed that handling, loading and transportation induced lymphopenia, neutrophilia, liveweight loss, and mortality, which was alleviated by oral administration of AA, E, a...