نتایج جستجو برای: 2 250
تعداد نتایج: 2562995 فیلتر نتایج به سال:
We demonstrate an Yb:YAG single-crystal fiber laser with 251 W output power in continuous-wave and an optical efficiency of 44%. This performance can be explained by the high overlap between pump and signal beams brought by the pump guiding and by the good thermal management provided by the single-crystal fiber geometry. The oscillator performance with a reflectivity of the output coupler as lo...
Type IV collagen, a nonfibrillar type, is ubiquitously expressed in the basement membrane around cardiomyocytes. Canstatin, a cleaved product of α2 chain of type IV collagen, is an antiangiogenic factor. Because it has not been clarified whether canstatin exerts other biological activities in heart, we investigated the effects of canstatin on adult rat cardiac fibroblasts. Cell migration was de...
BACKGROUND The aim of this study was to determine the maximum tolerated dose (MTD), toxicity profile and response rate of the oral 5-fluorouracil prodrug UFT (tegafur/uracil) and leucovorin (LV) in combination with irinotecan in patients with advanced or metastatic colorectal cancer. PATIENTS AND METHODS Patients with histologically proven advanced or metastatic colorectal adenocarcinoma rece...
Problem Statement. A very different way is needed to perform jitter testing of multi-Gbps physical layer ICs on a highvolume production line [1]. To perform high-volume production testing, several issues must be addressed. First, what measurements are required to characterize jitter in multi-Gbps physical layer ICs? Should the BER performance of the IC be tested or not? Secondly, as shown in Fi...
Activation of RNA-polymerase-II-dependent transcription involves conversion of signals provided by gene-specific activator proteins into the synthesis of messenger RNA. This conversion requires dynamic structural changes in chromatin and assembly of general transcription factors (GTFs) and RNA polymerase II at core promoter sequence elements surrounding the transcription start site of genes. On...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید