نتایج جستجو برای: crown symmetry
تعداد نتایج: 104166 فیلتر نتایج به سال:
introduction: a limited number of studies have evaluated factors influencing the retention of fixed prostheses cemented to implant abutments. the aim of this study was to compare the effect of varying degrees of screw access channel obturation on retention of implant-supported cast fixed restorations. materials & methods: in this experimental study, 40 implant abutments with a diameter of 4.5 ...
Animation 1 (au 101000 500eV.avi): Continuum-like illustration of the densification due to a Au101000 500 eV/atom cluster impact event. The atoms are shown as small squares, which overlap completely in the bulk region, making the animation look like a continuum. The animation shows a 1000 Å wide and 1200 Å high cross section through the simulation cell. The cross section thickness is 4.08 Å (1 ...
The multi-layered cell envelope structure of Gram-negative bacteria represents significant physical and chemical barriers for short-tailed phages to inject phage DNA into the host cytoplasm. Here we show that a DNA-injection protein of bacteriophage Sf6, gp12, forms a 465-kDa, decameric assembly in vitro. The electron microscopic structure of the gp12 assembly shows a ~150-Å, mushroom-like arch...
Ghaderi F (2019) Incidence of root and crown rot disease of black cumin in the southwest of Iran. Plant Pathology Science 8(2):1-8. DOI: 10.2982/PPS.8.2.1 Introduction: Black cumin, an annual flowering plant in the family Ranunculaceae, is a medicinal herb with many pharmacological properties. Crown and root rot disease of this plant has been reported in most countries worldwide. This stud...
In this study, the abundance and biomass of soil macrofauna were investigated in natural forests of tamarisk and Euphrates poplar in riparian forests of Maroon River in Khuzestan province. Soil macrofauna were collected using 175 sampling plots 50 meter distance from each other on 21 parallel lines with 100 meters distance from each other and perpendicular to the river. Soil macrofauna sampling...
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