Much of life's essential molecular machinery consists of large protein assemblies that currently pose challenges for structure determination. A prominent example is the nuclear pore complex (NPC), for which the organization of its individual components remains unknown. By combining stochastic super-resolution microscopy, to directly resolve the ringlike structure of the NPC, with single particl...

ceramic ultrafiltration membranes are considered as an alternative for the treatment of both stable water-in-oil and oil-in-water emulsions proved to be more effective in comparison with other conventional techniques. in this study, symmetric macro-porous ceramic membranes are prepared through dry pressing of α-alumina powder and the addition of various binders including poly (vinyl alcohol). t...

The assessment and monitoring of groundwater resources is increasing importance to ensure the continuous supply fresh water for human activity endangered ecosystems. These include fully saturated aquifers, in unsaturated soil, trapped as rock moisture weathered bedrocks. Low-field nuclear magnetic resonance (NMR) a method with unique sensitivity pore water, it based on magnetization relaxation ...

Abstract Compared with low-permeability oil reservoirs, tight reservoirs have more nanopores, complex pore structure, and obvious nonlinear seepage characteristics. Under the macro-scale channel flow, influence of micro-forces is often ignored, but micro-nano-scale become main factors affecting flow. The flow different from requires force between fluid micro-nano tubes. article conducts thresho...

Abstract Log interpretation and evaluation of tight sandstone reservoir in Chang 8 Member Longdong West area, Ordos Basin, China, are facing great challenges due to the co-development normal oil pay resistivity low-contrast pay. To better guide exploration development resources this characteristics control mechanism were studied. Firstly, reservoirs divided into (RLP) (NP) based on relative val...

Understanding acoustic velocities of sedimentary deposits is crucial for realistic subsurface imaging. The rely on mineralogy, density, as well pore volume (porosity) and structure. In carbonate rocks, both depositional diagenetic histories exert a significant control these characteristics. order to determine this control, petrographic analysis (thin sections) associated with the content, grain...

the characterizations of natural diatomite from birjand deposit (iran) were studied such as chemical compositions, specific surface area, total pore volume, pore size distribution and xrd. the diatomite that was treated only with sulfuric acid displayed a larger surface area, expanded total pore volume and increased pore size in comparison with both washed natural diatomite with deionized water...

The ability of a rock to store and flow fluids is dependent upon the pore volume, pore geometry and its connectivity. Carbonate rocks are inherently heterogeneous having been laid down in a range of depositional environments and having undergone significant diagenesis. They are particularly difficult to characterise as the pore sizes can vary over orders of magnitudes and connectivity of pores ...