نتایج جستجو برای: psr
تعداد نتایج: 3126 فیلتر نتایج به سال:
Abstract. Parasocial theory views ordinary people’s emotional bonding with political figures as a form of parasocial relationship (PSR). Despite the insights it offers, existing measures PSR have been criticized conceptually and psychometrically. We developed new scale (PSR-P) examined construct validity, factor replicability, measurement invariance based on samples from culturally politically ...
Contribution of phosphatidylserine receptor to apoptotic cell uptake Apoptosis or programmed cell death occurs during embryogenesis, normal cell turnover, and as a consequence of immune mediated, infectious, or inflammatory effects. Clearance of intact apoptotic cells (ACs)* by phagocytes protects surrounding tissues from intracellular factors and reduces the likelihood of tissue damage caused ...
با توجه به رشد روز افزون استفاده از وسایل الکترونیکی قابل حمل و افزایش تمایل به کاهش حجم و در عین حال افزایش عمر باتری مورد استفاده در این تجهیزات، نیاز به رگولاتور هایی احساس می شود که قادر باشند از حداقل ولتاژ ورودی، ولتاژی ثابت و پایدار برای بار فراهم آورده و در عین حال خود کمترین مصرف ممکن را از ولتاژ ورودی داشته باشند. از بین انواع مختلف رگولاتورها، رگولاتور های با افت کم (ldo)، دارای چنین...
We complete our study of pulsars’ non-uniform surface temperature and of its effects on their soft X-ray thermal emission. Our previous work had shown that, due to the effect of gravitational lensing, dipolar fields cannot reproduce the strong pulsations observed in the four nearby pulsars for which surface thermal radiation has been detected: PSR 0833-45 (Vela), PSR 0656+14, PSR 0630+178 (Gemi...
S1 nuclease mapping experiments performed with RNA extracted from cell lines that were unable to metabolize L-rhamnose demonstrated that L-rhamnose and not a metabolite was the inducer of the L-rhamnose operons of Escherichia coli. In vitro transcription studies showed that purified RhaR activates transcription from the psr promoter in the presence of L-rhamnose. In the absence of L-rhamnose, R...
The Pictet-Spengler reaction (PSR) involves the condensation and ring closure between a β-arylethylamine and a carbonyl compound. The combination of dopamine and ketones in a PSR leads to the formation of 1,1'-disubstituted tetrahydroisoquinolines (THIQs), structures that are challenging to synthesize and yet are present in a number of bioactive natural products and synthetic pharmaceuticals. H...
Ad-hoc networks have become a hot topic in the research world. Routing in ad-hoc networks has faced so many problems due to the peculiar nature of ad hoc environments. In this paper a new routing protocol based on source routing and zone based routing is proposed. Proactive source routing protocol (PSR) is a method to reduce overhead in ad hoc networks by making use of BFSTs (Breadth First Span...
Efficient phagocytosis of apoptotic cells is important for normal tissue development, homeostasis, and the resolution of inflammation. Although many receptors have been implicated in the clearance of apoptotic cells, the roles of these receptors in the engulfment process have not been well defined. We developed a novel system to distinguish between receptors involved in tethering of apoptotic c...
In this paper we attempt to dynamically constrain the quadrupole mass moment Q of the millisecond PSR B1257+12 pulsar from the orbital periods of its three planets, assumed to be in equatorial and circular orbits. Given the present-day accuracy in knowing their ephemerides, no post-Newtonian corrections to their motions are required. By conservatively assuming 1% and 10% uncertainties in the pu...
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