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The possibility of isolating lactic whey proteins (LWP) in the form of insoluble complexes (IC) with apple pectin was studied. The effect of pH, ionic strength (mu, NaCl), temperature (T degree C), pectin weight fraction (X3%) and the total concentration of macromolecular components in the system (Ws) on isolation has been considered. The process has been characterized by LWP yield in the composition IC--P, percentage and the extent of protein concentration in the concentrated phase (IC)--F. The mixing of lactic whey with a pectin solution usually yielded an IC (10% less than or equal to X3 less than or equal to 90%). The dependence of P on X3 is of an extreme nature with a maximum of 85% at X3 = 60%. The following conditions correspond to the maximum LWP yield (90%) in the complex composition: pH 3.4, mu = 0.01, T = 5-20 degrees C, X3 = 60%, Ws = 0.5%. At compositions of the system corresponding to the maximum P value (X3 = 60%) practically all the LWP fractions are present in the concentrated phase. If X3 much greater than 60% or X3 much less than 60% alpha-lactalbumin is practically absent in the concentrated phase. Usually, minimum F values (2.5-4.0) correspond to maximum protein yield at X3 = 60%. At X3 greater than 70% and X3 less than 50% F values may be considerably higher (20 times and more). A decrease in the pectin methylation degree from 56.7% down to 15.4% does not affect F. The maximum protein yield (94%) occurs when low methylated pectin is used. The character of the dependence of F on X3 is explained according to similar processes of complex gel formation and the processes of gel formation in polymer solutions. 相似文献
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I. I. Mishunina I. I. Tanasov A. S. Zhurba N. I. Vykhrestyuk V. N. Antonov 《Chemistry and Technology of Fuels and Oils》1990,26(9):501-503
Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 9, pp. 34–35, September, 1990. 相似文献
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Refractories and Industrial Ceramics - 相似文献
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Conclusions A new method is proposed for determining the slag resistance of refractories with lever apparatus which is qualitative.The new technique permits the specific features of the destruction of refractories by slags to be determined, and explains the mechanism of this process by mineralogical analysis and by describing the external appearance of the changed specimens.Data on the changes in the specimens during tests and the compositions of the zones will be given in the next article.Data obtained by the new method show that the slag destruction of refractories accelerates with time. 相似文献
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E. G. P'yanykh G. I. Antonov L. M. Yakobshuk 《Refractories and Industrial Ceramics》1979,20(1-2):48-52
Conclusions Out of all the experimental bonding agents used in the production of unfired magnesite and magnesite-chromite refractories: SDW; MgSO4,· 7H2O; MgSO4·7H2O + H3BO3; (NaPO3)n, the greatest strength on heating is provided by the addition of 2% (NaPO3)n.An addition of boric acid to the refractories using the MgSO4,·7H2O bonding agent helps to strengthen the refractories in the 500–900°C interval; at a higher temperature the refractories with the magnesium sulfate plus boric acid bonding have no advantages in their strength properties over the articles with the magnesium sulfate bonding agent only.The magnesite-chromite articles with the chemical bonding agent have better strength in the 1000–1400°C interval than the magnesite articles. This is explained by the spinelformation reactions which occur at these temperatures.On the basis of these studies (NaPO3)n and also MgSO4,· 7H2O with an addition of H3BO3 can be recommended as chemical bonding agents for unfired magnesite-chromite refractories.Translated from Ogneupory, No. 1, pp. 48–52, January, 1979. 相似文献
8.
D. A. Antonov K. K. Veremeenko M. V. Zharkov R. Yu. Zimin I. M. Kuznetsov A. N. Pron’kin 《Journal of Computer and Systems Sciences International》2016,55(5):832-841
An experimental model of the onboard integrated navigation system for airport ground vehicles designed for use as part of an advanced surface movement guidance and control system is considered. The technique and the results of field tests of the system are presented. The composition and design of the mobile test stand are described. 相似文献
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P V Ananthapadmanabhan A V Bapat A K Das B K Karan R Majumder R K Marwah D S Patil S V K Rao V K Rohatgi K G Sankaran P Satyamurthy R Sharma P B Shrivastava M K Totlani N Venkat-Ramani F A Akopov A V Karpukhin V V Kirillov V I Maksimenko A S Prokop A I Romanov B V Roshin E V Shishkov A S Tikhotsky V I Zalkind N I Antonov V V Brajevsky D K Burenkov V A Efremov V N Sukhov 《Sadhana》1982,5(3):169-195
This paper summarizes the major results of the joint Indo-Soviet experiment for testing the Indianmhd generator channel section, designed and fabricated at the Bhabha Atomic Research Centre, Bombay, which was carried out at the U-02 facility in Moscow, USSR, in May 1980. The total test duration was 65 hours and included electrophysical tests and life tests under applied electric fields. The main purpose of the tests was to substantiate the physical concepts, computer codes, design features and special processing techniques involved in the development ofmhd generators for the Indian pilot plant at Tiruchirapalli. The experimental observations on the phenomena of heat transfer to the walls, gas dynamics in the channel, electrical characteristics of the generator and near-electrode processes including the analysis of arc spots correlate with the theoretical estimates based on present understanding of the physical processes occuring in similarmhd generators. The post-operational inspection of the channel section and extensive investigation of materials through microscopic analysis, chemical analysis and x-ray analysis are also reported in this paper. The joint test programme has clearly demonstrated the definite operating capability of the test section and has given sufficient information and encouragement for building better and improved channels for the future. 相似文献