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541.
542.
Sumit Joshi Shweta Goyal Abhijit Mukherjee M. Sudhakara Reddy 《Journal of industrial microbiology & biotechnology》2017,44(11):1511-1525
Concrete is the most widely used construction material of the world and maintaining concrete structures from premature deterioration is proving to be a great challenge. Early age formation of micro-cracking in concrete structure severely affects the serviceability leading to high cost of maintenance. Apart from conventional methods of repairing cracks with sealants or treating the concrete with adhesive chemicals to prevent the cracks from widening, a microbial crack-healing approach has shown promising results. The unique feature of the microbial system is that it enables self-healing of concrete. The effectiveness of microbially induced calcium carbonate precipitation (MICCP) in improving durability of cementitious building materials, restoration of stone monuments and soil bioclogging is discussed. Main emphasis has been laid on the potential of bacteria-based crack repair in concrete structure and the applications of different bacterial treatments to self-healing cracks. Furthermore, recommendations to employ the MICCP technology at commercial scale and reduction in the cost of application are provided in this review. 相似文献
543.
Water around biomolecules is special for behaving strangely – both in terms of structure and dynamics, while ions are found to control various interactions in biomolecules such as DNA, proteins and lipids. The questions that how water and ions around these biomolecules behave in terms of their structure and dynamics, and how they affect the biomolecular functions have triggered tremendous research activities worldwide. Such activities not only unfolded important static and dynamic properties of water and ions around these biomolecules, but also provoked heated debate regarding their explanation and role in biological functions. DNA, being negatively charged, interacts strongly with the surrounding dipolar water and positively charged counterions, leading to complex electrostatic coupling of water and ions with the DNA. Recent time-resolved fluorescence Stokes shift experiments and related computer simulation studies from our and other laboratories have unfolded some unique dynamic characteristics of water and ions near different structures of DNA. These results are discussed here to showcase the specialty of water and ion dynamics around DNA. 相似文献
544.
Yogendra P. Chaubey 《Biometrical journal. Biometrische Zeitschrift》1982,24(5):457-461
A general linear model with a known covariance structure is considered. The method of Minimum Norm Quadratic estimation extending RAO'S (1972) argument is outlined. This method is illustrated for a particular model where it is noted that MINQE used for estimating intraclass correlation coefficient yields the maximum likelihood estimate. 相似文献
545.
Alpha-chymotrypsin was made more hydrophilic by modifying 11 (out of 16) ε-amino groups with pyromellitic dianhydride. The hydrophilic preparation was precipitated with n-propanol. This preparation gave significantly higher initial rates at the optimum aw (127.51 nmol mg?1 min?1 in n-octane and 21.30 nmol mg?1 min?1 in acetonitrile at aw=0.33) compared with the lyophilized preparation (53.50 nmol mg?1 min?1 in n-octane and 0.26 nmol mg?1 min?1 in acetonitrile at aw=0.97). FT-IR showed that the precipitate of modified alpha-chymotrypsin has a higher content of alpha-helices and beta-sheets compared to the lyophilized powder. 相似文献
546.
Dandekar Shweta N. Lotlikar Onkar A. Ramana M. M. V. Rathod Shrimant V. 《Russian Journal of Bioorganic Chemistry》2021,47(4):874-881
Russian Journal of Bioorganic Chemistry - This work provides the first example of incorporating the thiazole moiety into the aminobenzylnaphthol i.e. Betti base. A series of novel synthesized Betti... 相似文献