نتایج جستجو برای: polarizing microscope
تعداد نتایج: 47721 فیلتر نتایج به سال:
When a transparent surface is present between an observer and an object, an image reflected by the surface may be superimposed on the image of the observed object. We present a new approach to recover the scenes (layers) and to classify which is the reflected/transmitted one, based on imaging through a polarizing filter at two orientations. Estimates of the separate layers are obtained by weigh...
Direct laser writing (DLW) in liquid crystals (LCs) enables a range of new stimuli-responsive functionality to be realized. Here, method fabricating mechanically tunable diffraction gratings stretchable LC gels is demonstrated using combination two-photon polymerization direct (TPP-DLW) and ultraviolet (UV) irradiation. Results are presented that demonstrate the fabrication grating written TPP-...
The role of gap junctional communication during patterning of the chick limb has been investigated. Affinity-purified antibodies raised against rat liver gap junctional proteins were used to block communication between limb mesenchyme cells. Co-injection of the antibodies and Lucifer yellow into mesenchyme cultures demonstrated that communication was inhibited almost immediately. When antibodie...
The objectives of this study were to determine the nature (aeolian vs. alluvial) and origin of sandy sediments in southwestern Iran (Khuzestan province) were collected in two transects across (NW-SE directions) and perpendicular to the Karkheh River, by using grain sized distribution characteristics, and the mineralogy and micro-texture of quartz grains of forty-five surface samples (0-30cm) at...
The alkali−silica reaction (ASR)-induced expansion of mortar bars containing four types aggregates originating from different regions in northwest China was studied. chemical composition, mineral vitreous and amorphous substances, rates were determined using X-ray fluorescence, diffraction, polarizing microscope images, the accelerated bar test (AMBT). inhibitory effects fly ash silica fume on ...
In recent years, “Jin Gao Yu” that has been traded as a kind of jade appeared in areas the Luonan and Shangnan counties, Shangluo City, Shaanxi Province, attracting attention scholars consumers for its delicate texture warm color. this study, infrared spectroscopy, Raman X-ray diffraction analysis, electron microprobe analysis were used to conduct systematic gemmological test an Yu”. The result...
The formation of oxalates in soils and rocks under conditions cryoarid climate, permafrost taiga vegetation was studied. Whewellite weddellite were found four areas associated with the mining industry: on kimberlite deposit Daldyn territory, lower reaches Markha River Central Yakut Plain, coastal outcrop Allah-Yun Sellah-Khotun ore cluster. upper organic horizon Skeletic Cryosol (Thixotropic) (...
Dynamic nuclear polarization of 17O was studied using four different polarizing agents – the biradical TOTAPOL, and the monoradicals trityl and SA-BDPA, as well as a mixture of the latter two. Field profiles, DNP mechanisms and enhancements were measured to better understand and optimize directly polarizing this low-gamma quadrupolar nucleus using both monoand bi-radical polarizing agents. Enha...
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