The physiology of contractile vacuoles; the effects of short-term variations of temperature on a fresh-water peritrich ciliate.

The Physiology of Contractile Vacuoles v. the Effects of Short-term Variations of Temperature on a Fresh-water Peritrich Ciliate

The Physiology of Contractile Vacuoles Iii. the Water Balance of Fresh-water Peritricha

STRONG evidence has been brought forward (Kitching, 1934, 1936 a) to show that in euryhaline marine peritrich ciliates the contractile vacuole prevents excessive swelling of the body when the organism is placed in dilute sea water. From this it has been inferred (Kitching, 1936 a, p. 24; and 1937) that in fresh-water Protozoa the contractile vacuole normally controls the body volume. In order t...

The Physiology of Contractile Vacuoles Ix. Effects of Sudden Changes in Temperature on the Contractile Vacuole of a Suctorian; with a Dis- Cussion of the Mechanism of Contraction

When the suctorian *Discophrya piriformis Guilcher (1947) is transferred to a medium of different osmotic pressure, there is a slight delay in the adjustment of the rate of output of the contractile vacuole to a new osmoregulatory level. It has been suggested that the rate of osmotic uptake of water from the medium into the organism must change simultaneously with the change of medium, and ther...

Effects of fresh, aged and cooked garlic extracts on short- and long-term memory in diabetic rats

Objective: The present study was hypothesized to investigate the beneficial effects of fresh, aged, and cooked garlic extracts on blood glucose and memory of diabetic rats induced by streptozocine (STZ). Material and Methods: Diabetes was induced by an intraperitoneal injection of STZ (60 mg/kg body weight). An oral dose of 1000 mg/kg of each garlic extract was given daily for 4 weeks after dia...

Physiological Responses of Pteropyrum aucheri to Short-term Warming in Semi-arid Rangelands (Case Study: Kohpanj Region, Kerman Province, Iran)

Scientists predict climate changes and warmer conditions for the world in future. Predicting the warming effect on plant performance is one of the most important challenges in ecological sciences. In this study, the effects of short-term warming on physiological traits of Pteropyrum aucheri as one of the domain shrubs was assessed in riverside of semi-arid rangelands of Kohpanj region, Bardsir,...