Mechanically refrigerated test chambers are classified as either single stage low (-40 °C) or cascade ultralow (-70 °C) temperature systems. While cascade systems are reliable and versatile, the potential for leakage between stages within a cascade heat exchanger remains. Further, the need for two compressors and increased control mechanisms can make the system more and more complex. The only m...

Background: Testosterone and its metabolites have important roles in learning and memory. The current study has conducted to assess the effect of pre-training, post-training and pre-probe trial intrahippocampal CA1 administration of 3 alpha-anderostanediol (one of the metabolites of testosterone) and indomethacin (as 3 alpha-hydroxysteroid dehydrogenase enzyme blocker) on acquisition, consolida...

A T THE suggestion of a medical friend the writer decided to investigate the use of viatmin B, in connection with turf culture. This was about a year and a half ago. Extensive investigation of this particular vitamin substance was being carried on at the nearby California Institute of Technology, HO at my friend's request a visit was made to the school and a sample was obtained with which to st...

Intake  is  a  concept  that  has  long  fascinated  second  language  researchers  as  it  provides  a window  onto  the  crucial  intermediary  stage  between  input  and  acquisition.  A  better understanding of this intermediary  stage can  help us to distinguish between input that  is used for immediate (e.g. communicative) purposes only and input that is drawn on for learning. This articl...

time of acquisition desiccation tolerance in peanut seed during different growing stages was determined by evaluating seed moisture content, germination capability and electrical conductivity. it was done in research field of gorgan university of agricultural sciences and natural resources in completely block randomize design in four planting date and four replications. sampling was done weakly...

The article deals with the issue of experimental research so-called design overloaded stage. A new device enabling measurements on two-stage axial turbine is advantageously used in this task. setup designed so that a preparatory stage included front examined introduces some aerodynamic overload already flow path phase. This program focused primarily effect leakage flows and their mixing mainstr...

context different approaches are routinely applied in the treatment of concomitant cholecystocholedocholithiasis. most patients are treated by preoperative endoscopic sphincterotomy followed by laparoscopic cholecystectomy in a two-stage approach. however one-stage approach carrying out intraoperative endoscopic sphincterotomy (ioes) is emerging as a minimally invasive alternative option. our r...