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171.
X-ray diffraction has been applied to the component interaction study in the ternary Tm Mn B system, and the 1070 K isothermal section of the phase diagram has been constructed. The ternary boride TmMnB4 is confirmed as present, which has the YCrB4 structure type (space group Pbam, a = 0.5868-0.5894 nm; b = 1.1320-1.1370 nm; c = 0.3368-0.34018 nm). The lattice parameter variation indicates that the ternary boride has only a narrow homogeneity region, which is in the direction of higher manganese contents. There are no solid solutions based on binary compounds in the Tm Mn B system. 相似文献
172.
173.
Horák D Galibin IE Adamyan AA Sitnikov AV Dan VN Titova MI Shafranov VV Isakov YF Gumargalieva KZ Vinokurova TI 《Journal of materials science. Materials in medicine》2008,19(3):1265-1274
Poly(2-hydroxyethyl methacrylate) (PHEMA) embolization particles with enhanced haemostatic properties were prepared by bulk
or suspension polymerisation of 2-hydroxyethyl methacrylate (HEMA) followed by particle soaking in ethamsylate solution. The
particles accelerated thrombus formation as evidenced by blood analysis of rabbits with implanted emboli. Usefulness of both
spherical and cylindrical PHEMA particles with enhanced haemostatic effect was demonstrated on the embolization of arterial
anastomosis, fistulas of the lower extremity and abdominal cavity, haemangioma and arteriovenous malformation of the head
of several children. 相似文献
174.
Vadim A. Byvaltsev Andrei A. Kalinin Phillip A. Hernandez Valerii V. Shepelev Yurii Y. Pestryakov Marat A. Aliyev Morgan B. Giers 《International journal of molecular sciences》2022,23(21)
Spinal stenosis (SS) is a multifactorial polyetiological condition characterized by the narrowing of the spinal canal. This condition is a common source of pain among people over 50 years old. We perform a systematic review of molecular and genetic mechanisms that cause SS. The five main mechanisms of SS were found to be ossification of the posterior longitudinal ligament (OPLL), hypertrophy and ossification of the ligamentum flavum (HLF/OLF), facet joint (FJ) osteoarthritis, herniation of the intervertebral disc (IVD), and achondroplasia. FJ osteoarthritis, OPLL, and HLF/OLFLF/OLF have all been associated with an over-abundance of transforming growth factor beta and genes related to this phenomenon. OPLL has also been associated with increased bone morphogenetic protein 2. FJ osteoarthritis is additionally associated with Wnt/β-catenin signaling and genes. IVD herniation is associated with collagen type I alpha 1 and 2 gene mutations and subsequent protein dysregulation. Finally, achondroplasia is associated with fibroblast growth factor receptor 3 gene mutations and fibroblast growth factor signaling. Although most publications lack data on a direct relationship between the mutation and SS formation, it is clear that genetics has a direct impact on the formation of any pathology, including SS. Further studies are necessary to understand the genetic and molecular changes associated with SS. 相似文献
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176.
Kurbanov Mirtemir Tulaganov Sardor Nuraliev Ulugbek Andriyko Lyudmila Goncharuk Olena Guzenko Natalia Nychyporuk Yurii Marynin Andrii 《SILICON》2023,15(3):1221-1233
Silicon - This paper presents the comparative analysis of the properties of highly dispersed silicas synthesized by pyrogenic and fluoride methods. Raw materials and synthesis conditions differ... 相似文献
177.
Kostyantyn Grytsenko Yurii Kolomzarov Peter Lytvyn Olga Kondratenko Mykola Sopinskyy Iryna Lebedyeva Agata Niemczyk Jolanta Baranovska Dariusz Moszyński Claus Villringer Sigurd Schrader 《大分子材料与工程》2023,308(6):2200617
Thin polytetrafluoroethylene (PTFE) films are produced by deposition from a gas phase by two methods: electron-enhanced vacuum deposition (EVD) and EVD + low-temperature plasma (LTP). Structure, morphology, and composition of the films are studied by IR spectroscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. They are close to the structure of bulk PTFE. The roughness of the films’ surface is changed with gas pressure and LTP power variations. Films are transparent from UV to near-infrared regions. Refractive and extinction indices and their anisotropy are measured by spectral ellipsometry. They are tuned by variations of deposition conditions. Hardness and Young modulus of the films are increased if EVD + low power LTP is used for film deposition. Use of EVD + LTP also increases thermal stability of the films. Contact angle of the films corresponds to the bulk PTFE. The PTFE molecules oriented are preferentially in perpendicular direction to the substrate surface. 相似文献