نتایج جستجو برای: scr
تعداد نتایج: 3895 فیلتر نتایج به سال:
BACKGROUND AND OBJECTIVES The prevalence of chronic kidney disease (CKD) has increased over the past two decades. The sensitivity of serum creatinine (sCr) to identify CKD is low. As a result, many healthcare centers report estimated GFR (eGFR) with routine blood work. The aim of this study was to determine the cost-effectiveness of automatic eGFR reporting compared with reporting sCr alone. ...
In a proof-of-concept study we demonstrate in situ reaction monitoring of DeNO(x)-SCR on proton-conducting zeolites serving as catalyst and gas sensor at the same time. By means of temperature-dependent impedance spectroscopy we found that the thermally induced NH(3) desorption in H-form and in Fe-loaded zeolite H-ZSM-5 follow the same process, while a remarkable difference under DeNO(x)-SCR re...
The Concealed Information Test (CIT) uses psychophysiological measures to determine the presence or absence of crime-related information in a suspect's memory. We conducted a meta-analysis on the validity of the CIT based on four physiological measures-skin conductance response (SCR), respiration line length (RLL), changes in heart rate (HR), and enhanced amplitudes of the P300 component of the...
In order to develop low-temperature (below 200 °C) and SO2-tolerant catalysts for selective catalytic reduction (SCR) of NOx, a series of cheap M/bauxite (M = Mn, Ni and Cu) catalysts were prepared using bauxite as a support. Their SCR performances are much superior to typical V2O5/TiO2, the addition of M into bauxite results in significant promotion of NOx removal efficiency, especially at low...
This paper presents SCR-based circuit extensions to a diode rectifier to allow regeneration during braking and ride-through during voltage sags. The proposed topology uses two line-commutated SCR bridges – one connected to the dc bus rails and the other to the dc bus center-tap. The inverting SCR bridge connected to the dc bus rails transfers energy from the dc link to the mains during regenera...
Urea/NH3-SCR is presently considered a key technology for the control and abatement of NO emissions from Diesel engines; the presence of a DOC catalyst upstream from the SCR unit warrants significant amounts of NO2 entering the SCR reactors together with NO. In this work new zeolite-based catalysts promoted by Fe and by Cu were investigated: reactivity tests were performed to allow a quantitati...
In plants, where cells cannot migrate, asymmetric cell divisions (ACDs) must be confined to the appropriate spatial context. We investigate tissue-generating asymmetric divisions in a stem cell daughter within the Arabidopsis root. Spatial restriction of these divisions requires physical binding of the stem cell regulator SCARECROW (SCR) by the RETINOBLASTOMA-RELATED (RBR) protein. In the stem ...
Nitrogen oxides (NOx) are formed during combustion in diesel engines and one current approach to reduce NOx to N2 is selective catalytic reduction with NH3 as reducing agent (NH3-SCR). To acquire both high activity and selectivity, the active site is often atomically dispersed metal atom, so-called single-site catalysts. In the case of NH3-SCR, one example is Cu-exchanged chabazite (Cu-CHA). Th...
BACKGROUND With the continuous development of cardiac interventional medicine, the incidence of contrast-induced nephropathy (CIN) is increasing every year, which is a serious threat to people's physical and mental health. Trimetazidine (TMZ) is a type of anti-ischemic drug developed in recent years, which can significantly reduce the incidence of CIN. At present, a systematic review and meta-a...
Intercellular protein movement plays a critical role in animal and plant development. SHORTROOT (SHR) is a moving transcription factor essential for endodermis specification in the Arabidopsis root. Unlike diffusible animal morphogens, which form a gradient across multiple cell layers, SHR movement is limited to essentially one cell layer. However, the molecular mechanism is unknown. We show th...
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