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A. I. Skrigan T. V. Murashkevich N. M. Khorevskaya G. N. Pershina N. E. Akimova 《Chemistry of Natural Compounds》1972,5(6):464-467
Conclusions 1. The content of lignin in the wood ofSalix viminalis andSalix acutifolia increases with the growth of the shoots during shortened days and also in drier climatic periods.2. The monosaccharides, glucose, fructose, and arabinose take part in the synthesis of the lignin of young wood ofSalix viminalis andSalix acutifolia. The formation of lignin of one-year willow wood takes place from May to January (with a maximum in June–July). The content of methoxyl groups in it gradually rises.Khimiya Prirodnykh Soedinenii, Vol. 5, No. 6, pp. 546–550, 1969 相似文献
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K. Yu. Novitskii Kh. Gresl O. V. Lyubinskaya T. A. Pershina 《Chemistry of Heterocyclic Compounds》1969,5(3):303-307
A study was made of certain transformations of the bicyclic compounds of the fur an series synthesized from 3,4-bis(chloromethyl)furan, N-butyl-4H, 6H-furo [3,4-c]pyrrole and 4H,6H-thieno[3,4-c]furan. On the basis of the same dichloride, 3,4-dimethyl furan and furan-3,4-dialdehyde were synthesized.For part XLVI, see [10]. 相似文献
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A. A. Magaeva O. G. Terekhova V. I. Itin N. I. Radishevskaya E. P. Naiden L. A. Egorova I. I. Ivanchuk A. G. Pershina 《Russian Journal of Applied Chemistry》2009,82(2):213-216
Structural parameters, dispersity, morphology, and magnetic properties of a tin dioxide-magnetite nanosize composite material mechanochemically synthesized from salt systems were studied. The possibility of using the composite nanopowder as a sorbent for nucleic acids was analyzed. 相似文献
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Glassy LiPO3/crystalline Al2O3 and glassy LiPO3/crystalline ZrO2 (0–12.5 vol.% of oxide fillers) composite solid electrolytes have been prepared by glass matrix softening. Their thermal and transport properties have been investigated by differential scanning calorimetry (DSC) and impedance spectroscopy methods. The addition of ZrO2 leads to a decrease in the crystallization temperature of LiPO3 glass. It was found that the conductivity behavior depends on the nature of the dispersed addition. In the case of the Al2O3 addition, the increase in the electrical conductivity is observed. The ionic conductivity of the LiPO3/10% Al2O3 composite reaches 5.8 × 10?8 S/cm at room temperature. In contrast, the conductivity in the LiPO3/ZrO2 composite system decreases. 相似文献
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Russian Journal of Applied Chemistry - Quenching method was used to obtain glasses in the system xWO3-(100-x)P2O5 (x = 70, 75, 80, 82 mol %). The electrical conductivity of the compositions was... 相似文献
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The Ga-Ag-Li|Li7La3Zr1.89Al0.15O12|(Li2O–B2O3–V2O5 + Fe) all-solid-state electrochemical cell has been designed with a simple sintering process. The Li7La3Zr1.89Al0.15O12 solid electrolyte was prepared by sol-gel method. The lithium borovanadate glass was obtained by a convenient melt quenching technique. Cycliс voltammetry has shown that the current densities of the cell at 300 °C can reach several hundreds of μA cm?2. At this temperature, the single cell voltage is about 3.2 and 0.8 V in the charged and discharged state, correspondingly. This cell produces a current enough to make a single LED of white color working. The cell surface discharge capacity exceeds 230 μAh cm?2. 相似文献
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Russian Journal of Applied Chemistry - xWO3–(100–x)P2O5 (70 mol % ≤ x ≤ 82 mol %) glasses were obtained by melt quenching. Their thermal properties were studied by the DTA... 相似文献
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Tolkacheva Anna S. Shkerin Sergey N. Zemlyanoi Kirill G. Reznitskikh Olga G. Pershina Svetlana V. Khavlyuk Pavel D. 《Journal of Thermal Analysis and Calorimetry》2019,136(3):1003-1009
Calcium vanadates Ca5Mg4−xZnx(VO4)6 (0 ≤ x ≤ 4) have been studied for the first time using a set of high-temperature methods of analysis. The onset of melting process determined from differential scanning calorimetry decreases from 1158 to 881 °C (± 1.5 °C) with increasing of x (dopant’s content). CTE temperature dependence is found to show a hysteresis. Electrical transport properties measured by impedance spectroscopy in air of different humidity are also discussed. The value of electrical conductivity does not depend on air humidity. It is found to equal to 1.5 × 10−6 S cm−1 at 720 °C for Ca5Mg4(VO4)6 which is specific for garnet-related crystals.
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