introduction: in single photon emission computed tomography (spect), the projection data used for image reconstruction are distorted by several factors, including attenuation and scattering of gamma rays, collimator structure, data acquisition method, organ motion, and washout of radiopharmaceuticals. all these make reconstruction of a quantitative spect image very difficult. simulation of a sp...

The T7, T3, and SP6 RNA polymerases recognize very similar, yet distinct, promoter sequences. The high homology among the promoter sequences suggests that differential promoter recognition must derive from relatively small changes in the protein. Steady-state kinetic analyses of transcription from the T3 consensus promoter and from promoters modified in the region critical to specific recogniti...

Polarized transport by microtubule-based motors is critical for neuronal development and function. Selective translocation of the Kinesin-1 motor domain is the earliest known marker of axonal identity, occurring before morphological differentiation. Thus, Kinesin-1-mediated transport may contribute to axonal specification. We tested whether posttranslational modifications of tubulin influence t...

conclusions antimicrobial and antitoxigenic properties of natural products need a firmly established criterion before they could be offered to application. results a significant reduction in aflatoxin production was noted which was not due to the inhibitory effect but because of antifungal property of the oil. interestingly, the oil promoted toxin production for the reasons yet to be investigat...

introduction: in  major b -thalassemia impaired biosynthesis of beta hemoglobin leads to accumulation of unpaired alpha hemoglobin chain. an iron overload generates oxygen-free radicals which ultimately leads to tissue injury. the aim of this investigation was to evaluate serum antioxidants in patients with major b -thalassemia and those with minor thalassemia in comparison with respective age ...

In the second part of this series, we propose a physics-based model for describing temperature dependence TiOₓ-based memristors, both switching and static. We show that current-voltage (I-V) characteristics memristor in nonswitching regime, indicating Schottky emission mechanism, can be described by minor modifications to current equation. This leads static I-V compact model. Simultaneously, dy...

The paper deals with an efficient coder structure being appropriate for scalable coding of video. The coder consists of two motion-compensated hybrid coders with independent motion estimation and compensation. The structure implements spatial scalability or mixed spatial and temporal scalability that can be combined with fine granular SNR scalability. The encoder exhibits extended capabilities ...

In the last two decades, most researchers have taken an interest to understand how technology affects negatively. It is extensively reported that techno stress evoked due among different groups like prospective teachers. This quantitative survey examined technostress level of teachers in department education using a validated instrument. The findings study show used instrument was found valid e...

Wind-tunnel experiments are performed to investigate the effect of minor modifications roof edge shape on power performance and wake characteristics a horizontal-axis wind turbine sited cube-shaped building. Three shapes considered: sharp edge, rounded solid fence. The is dependent its streamwise position, due difference in flow shear induced by different edges. fence cases show high variation ...

The depletion rate of conventional petroleum fuels is very fast. Gasoline used as fuel in the SI engine. Emissions from this cause environmental pollution because it produces harmful emissions for environment such CO2, CO, HC, and NOx. Liquefied gas (LPG) has physical chemical properties that make a favorable IC engines. It can be alone or combined with gasoline some minor engine modifications....