homogenous charge compression ignition (hcci) is a mode of combustion in ic engines in which premixed fuel and air are ignited spontaneously. there is a belief that hcci engines have a great potential to improve fuel consumption and reduce nox emissions. in this study, a single zone, zero dimensional, thermo-kinetic model has been developed and a computer program with matlab software is used to...

Rab3A, Rab3B, Rab3C, and Rab3D are closely related GTP-binding proteins of synaptic vesicles that may function in neurotransmitter release. We have produced knock-out (KO) mice for Rab3B and Rab3C and crossed them with previously generated Rab3A and 3D knock-out mice to generate double, triple, and quadruple Rab3 knock-out mice. We have found that all single and double Rab3 knock-out mice are v...

background: among all common techniques in sitedirectedmutagenesis, λ red recombinase system has beenwidely used to knock out chromosomal genes in bacteria. in thismethod, there is always the risk of dna linear digestion byhost's restriction enzymes that leads to the low frequency ofrecombination. objectives:to overcome this, we constructeda recombinant vector to disrupt phop gene in salmonella...

Experiments were conducted on a diesel-methanol dual-fuel (DMDF) engine modified by six-cylinder, turbo-charged, inter-cooled diesel engine. According to the number of injection, experiments are divided two parts: single injection mode and double mode. The results show that, at mode, maximum pressure rise rate is small runs smoothly, however, knock still occurs when co-combustion ratio (CCR) bi...

The Research Octane Number (RON) and the Motor (MON) are primary fuel properties that characterize gasoline’s knock resistance in spark ignition engines. utility of these two metrics, however, has been questioned with advancements engine technologies significantly change thermochemical environment inside cylinder. Index, OI = (1-K)·RON + K·MON, therefore proposed to modern engines where K weigh...

Homogenous Charge Compression Ignition (HCCI) is a mode of combustion in IC engines in which premixed fuel and air are ignited spontaneously. There is a belief that HCCI engines have a great potential to improve fuel consumption and reduce NOx emissions. In this study, a single zone, zero dimensional, thermo-kinetic model has been developed and a computer program with MATLAB software is use...

enrichment of cell suspension with germ cells prior to injection into recipient seminiferous tubules is of importance in spermatogonial stem cells (sscs) transplantation. knock-out serum replacement (ksr) has been reported to enhance the proliferation of murine sscs and human embryonic stem cells. the aim of the present study was to investigate the effect of ksr versus fetal bovine serum (fbs) ...