نتایج جستجو برای: ping pong model
تعداد نتایج: 2106751 فیلتر نتایج به سال:
piRNAs guide PIWI proteins to silence transposons in animal germ cells. In Drosophila, the heterochromatic piRNA clusters transcribe piRNA precursors to be transported into nuage, a perinuclear structure for piRNA production and transposon silencing. At nuage, reciprocal cycles of piRNA-directed RNA cleavage—catalyzed by the PIWI proteins Aubergine (Aub) and Argonaute3 (Ago3) in Drosophila—dest...
Memory bandwidth is frequently a limiting factor in the design of high-speed switches and routers. In this paper, we introduce a buffering scheme called ping-pong buffering, that increases memory bandwidth by a factor of two. Ping-pong buffering halves the number of memory operations per unit time, allowing faster buffers to be built from a given type of memory. Alternatively, for a buffer of g...
This paper presents a novel method for absolute three-dimensional (3D) shape measurement that does not require conventional temporal phase unwrapping. Our proposed method uses a known object (i.e., a ping-pong ball) to provide cues for absolute phase unwrapping. During the measurement, the ping-pong ball is positioned to be close to the nearest point from the scene to the camera. We first segme...
Diacylglycerol (DAG) and monoacylglycerol (MAG) are two natural occurring minor components found in most edible fats and oils. These compounds have gained increasing market demand owing to their unique physicochemical properties. Enzymatic glycerolysis in solvent-free system might be a promising approach in producing DAG and MAG-enriched oil. Understanding on glycerolysis mechanism is therefore...
Germline-specific Piwi-interacting RNAs (piRNAs) protect animal genomes against transposons and are essential for fertility. piRNAs targeting active transposons are amplified by the ping-pong cycle, which couples Piwi endonucleolytic slicing of target RNAs to biogenesis of new piRNAs. Here, we describe the identification of a transient Amplifier complex that mediates biogenesis of secondary piR...
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