--There are various techniques which can be used for the manufacture of microproducts, micro electromechanical systems (MEMS) based manufacturing .Broadly these techniques are photolithography, chemical etching, plating, laser fabrication. Micro machining may be seen as an ultra precision material removal process and by this process it is able to achieve micro form accuracy and nanometers finis...

many studies on cold environments have been developed over the past two decades. highmountain freshwater presents high variability of nutrients and chemico-physical parameters, showing variations of ph, oxygen concentration, metals and temperature throughout the year. national park of sierra nevada (granada, spain) (37°032 n 03°182 w), has almost 40 lakes that are reported to be both endemic an...

en 1994, 125 carcases of camel (100 from isfahan and 25 from yazd) in slaughter - houses were studied for parasitic infections. seventy percent of the camels were infected with hydatid cyst and half of the males (50%) had testicular filaria identified as dipetalonema evansi. all the infected male camels except 3, demonstrated sheathed rnicrofilariae in their peripheral blood smears. although so...

Renewable electricity options, such as fuel cells, solar photovoltaic, and batteries, are being integrated, which has made DC micro-grids famous. For micro-grid systems, a multi input interleaved non-isolated dc-dc converter is suggested by the use of coupled inductor techniques. Since it compensates for mismatches in photovoltaic devices allows separate continuous power flow from these sources...

with the increasing installed capacity of desalination, the greenhouse gas emission for generating the required energy to power the desalination plants is also becoming the focus of attention in the world community. domestic reverse osmosis membranes have been very successful technology especially in the developing world to provide safe drinking water. the novel concept of photovoltaic powered ...

The phase transformation, microstructural and mechanical properties of Ti-15V-2Al high temperature shape memory alloy produced with arc-melting method were investigated by DSC, XRD, SEM micro-indenter system. reverse martensitic transformation As starting Af finishing temperatures obtained to be 195 °C 285 °C, respectively. In microindentation analysis, the subjected indentation tests under 500...

Abstract In order to satisfy the requirements of drag sail for future micro-satellite, device and dynamic research process are carried out. A mathematical model is established, static performance deployable mechanism analyzed at different temperature. The results show that there enough moment start deployment temperature range -70 100 °C, starting torque realize sail, acceleration reaches 1905 ...

the micro wire electrical discharge machining (micro wire-edm) process is a modern machining process with various applications in manufacturing micro-parts. the recast layer remaining on the machined surfaces is an inevitable complication of this process. this layer can subsequently affect the machined parts performance. to optimize the recast layer in the micro wire-edm of the molybdenum micro...

background and purpose: gastric cancer (gc) is one of the most common cancers worldwide and in iran. as conventional therapies such as surgery and chemotherapy are invasive with adverse effects, current studies are important as they are conducted to find natural compounds with few adverse effects. in this study, melittin with 26 amino acids was isolated and purified from bee venom and its effec...