In young pollen grains of Datura innoxia, a wall of the usual hemispherical type separates the 2 gametophytic cells initially and, in the electron microscope, appears as an electron-translucent matrix which is contiguous with the intine. Before detachment of the generative cell from the intine, the matrix decreases in thickness and in places is dispersed altogether leaving the plasmalemmae on e...

In this research, the effect of bubble surface area flux, Sb, and particle size on flotation rate constant, k, of pyrite (FeS2) particles was studied using bubble-particle interactions. The bubble-particle collision, attachment and detachment efficiencies were calculated under different flow regimes. The k increased with increase in the collision efficiency and decreas...

PURPOSE To improve our understanding of hyperacuity defects measured with preferential hyperacuity perimetry (PHP) by correlating PHP findings with the retinal microstructural changes visible on spectral-domain optical coherence tomography (OCT) in patients with polypoidal choroidal vasculopathy (PCV). MATERIALS AND METHODS Twenty-eight eyes of 28 patients with PCV were retrospectively review...

The formation and exhumation of high and ultrahigh-pressure, (U)HP, rocks of crustal origin appears to be ubiquitous during Phanerozoic plate subduction and continental collision events. Exhumation of (U)HP material has been shown in some orogens to have occurred only once, during a single short-lived event; in other cases exhumation appears to have occurred multiple discrete times or during a ...

ease than in zone 2 disease, where fortunately greater than 75% of the disease occurs. It is important to note that unfavorable outcomes as stage 5 (total retinal detachment) outnumbered stage 4B (a retinal fold extending through the macula) by a ratio of 13 to 1. The treated unfavorable results were far more common proportionately in zone 1 disease than in zone 2 disease. The results of this s...

Soil detachment is known as an important process in soil erosion and its quantification is necessary to establish a basic understanding of erosion. This study was carried out to find the best flow erosivity indicator(s) for predicting detachment rate at low slopes. For this purpose, 12 experiments including 6 flow discharges (75, 100, 125, 150, 175 and 200 ml/s) and 2 slope gradients (1.5 and 2...

Abstract The unmitigated heat flux in attached operation of a fusion power plant is predicted to be destructive any solid divertor surface. Detachment, whereby the plasma pressure drops significantly before reaching target thus greatly reducing and sputtering, will necessary ensure adequate lifetime facing components (PFCs). lithium vapor box aims detach via evaporating condensing surfaces. By ...

AIM: This study aimed to investigate the effectiveness of retinal laser coagulation in children with Coats disease.
 MATERIAL AND METHODS: The included 118 patients who were examined and treated from January 2017 December 2021; 102 them boys (86.6%) 16 girls (13.4%). All had unilateral disease. underwent a comprehensive ophthalmological examination. Laser was performed 113 using green (532...

Choroidal osteoma is a rare, benign formation of the choroid, which occurs most often in women working age and characterized by neovascularization 31-47% cases, even development bilateral optic nerve atrophy described. The etiology disease remains unknown, persistent associations with other ocular or systemic diseases, as well any disorders calcium phosphorus metabolism, have not been described...