Egypt is mainly covered by ophiolitic rocks, muscovite, and two mica granites, in addition to different types of acidic basic dikes. Our field observations indicated that El Sela granites were subjected alteration such as silicification, kaolinization, hematitization, which associated with uranium mineralization. Petrographic investigations clarified these rocks affected saussiritization, musco...

This paper compares the water sorption behavior of commercial microcrystalline celluloses with those of cellulose II materials using several nonlinear models. Aqueous dispersions of cellulose II were spray-dried employing an inlet drying air temperature of 195 °C; atomizing air pressure of 1.0 kg-f/cm; drying air flow-rate of 0.44 m/min; feed flow-rate of 2.0 mL/min and nozzle diameter of 0.7 m...

The coating of regular-shaped, readily available nanorod biotemplates with inorganic compounds has attracted increasing interest during recent years. The goal is an effective, bioinspired fabrication of fiber-reinforced composites and robust, miniaturized technical devices. Major challenges in the synthesis of applicable mineralized nanorods lie in selectivity and adjustability of the inorganic...

The Ethiopian Rift System consists of basins that are in different stages of evolution. Some of the rift-related basins in southwestern Ethiopia are half-grabens that have not evolved to symmetrical rifts since the initiation of rifting here in the middle Miocene. These basins contain fossiliferous Pliocene–Pleistocene volcaniclastic sediments and volcanic rocks and have been occupied by early ...

The Ediacaran Dengying Formation in Central Sichuan Basin is the deep dolomite gas reservoir with largest natural reserves China, providing an excellent example for understanding effect of diagenesis evolution on quality. By integrating petrology, geochemistry and situ U-Pb dating, this study aims to reveal genesis different rock fabrics their corresponding diagenetic events, discuss temporal r...

Recommended ways to improve the chemical and physico-mechanical properties of reaction-sintered ceramic materials based on molybdenum disilicide have been described. In order significantly increase operating temperatures change more stringent conditions for products, it is necessary existing methods processing ceramics development new ones. Various means studied analyzed, which include introduc...

Abstract Silicon (Si) has an important role in mitigating diverse biotic and abiotic stresses plants, mainly via the silicification of plant tissues. Environmental changes such as atmospheric CO 2 concentrations may affect grass Si which, turn, can alter herbivore performance. We recently demonstrated that pre‐industrial increased accumulation Brachypodium distachyon grass, yet patterns deposit...

jian cu deposit is hosted by surian volcano-sedimentary complex of permo-triassic age on the eastern edge of the sanandaj-sirjan metamorphic zone at a distance of 195 km from shiraz, southwestern iran. the complex consists mainly of metabasalt, chlorite-quartz schist, chlorite-muscovite schist, mica schist and graphite schist. pyrite is the most important sulfide and chalcopyrite is the major c...

Citlalt petl volcano is the easternmost stratovolcano in the Trans-Mexican Volcanic Belt. Situated within 110 km of Veracruz, it has experienced two major collapse events and, subsequent to its last collapse, rebuilt a massive, symmetrical summit cone. To enhance hazard mitigation efforts we assess the stability of Citlalt petl’s summit cone, the area thought most likely to fail during a potent...