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RISS 인기검색어
- 검색키워드
- 저자 : Anil Nanda (검색결과 3 건)
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Reliability based partial safety factor of concrete containing nano silica and silica fume
Anil Kumar Nanda,Prem Pal Bansal,Maneek Kumar 사단법인 한국계산역학회 2020 Computers and Concrete, An International Journal Vol.26 No.5
The influence of combination of nano silica and silica fume, as partial cement replacement materials, on the properties of concrete has been studied through the measurement of compressive strength. The compressive strength of concrete in terms of mean, standard deviation and with-in-test coefficient of variation related to the variation in the nominated parameters have also been developed. The compressive strength data developed experimentally has been analyzed using normal-probability distribution and partial safety factors of composite concretes have been evaluated by using first order second moment approach with Hasofer Lind’s method. The use of Nano silica and silica fume in concrete decreases the partial safety factor of concrete i.e., increase the reliability of concrete. The experimental results show that the properties of concrete having nano silica and silica fume in combination were better than that of a plain concrete. The SEM test results showing the level of Ca(OH)2 in plain concrete and consumption level Ca(OH)2 of concrete containing nano silica & silica fume have also been presented.
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Bipransh Kumar Tiwary,Anil Kumar,Ashis Kumar Nanda,Ranadhir Chakraborty 한국작물학회 2014 Journal of crop science and biotechnology Vol.17 No.3
The present study was conducted with the main objective to optimize petal yield from important marigold cultivars in WestBengal, and to standardize isolation of lutein from petals because these dietary xanthophylls are known to reduce the risks of agerelatedmacular degeneration (AMD) and cataracts. Six cultivars were studied viz. African marigold-Double (AFM-D), Africanmarigold-Single (AFM-S), African marigold-Orange (AFM-O), French marigold-Orange (FRM-O), French marigold-Double (FRMD),and LC (Local type), which withstand typical environmental conditions of northern West Bengal and produce flowers that do notvary in color and are relatively unaffected by pests and diseases. Lutein esters were extracted from milled marigold petals using nhexane. However, overall performance showed that LC is superior to the other cultivars. Pure lutein was obtained after saponificationwith 50% KOH. The re-crystallized lutein was characterized by UV-VIS, IR spectroscopy, and HPLC. A free-flowing lutein esterwas also formulated. This free-flowing lutein ester was found to be suitable to undergo commercialization or subsequent processing. An economic method for petal yield and isolation of lutein was thus standardized
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Sunil Kukreja,Osama I Ahmed,Justin Haydel,Anil Nanda,Anthony H Sin 대한척추신경외과학회 2015 Neurospine Vol.12 No.2
Objective: There are several reports, which documented a high incidence of complications following the use of recombinant human bone morphogenetic protein-2 (rhBMP-2) in anterior cervical fusions (ACFs). The objective of this study is to share our experience with low-dose rhBMP-2 in anterior cervical spine. Methods: We performed a retrospective analysis of 197 patients who underwent anterior cervical fusion (ACF) with the use of recombinant human bone morphogenetic protein-2 (rhBMP-2) during 2007-2012. A low-dose rhBMP-2 (0.7mg/level) sponge was placed exclusively within the cage. In 102 patients demineralized bone matrix (DBM) was filled around the BMP sponge. Incidence and severity of dysphagia was determined by 5 points SWAL-QOL scale. Results: Two patients had prolonged hospitalization due to BMP unrelated causes. Following the discharge, 13.2%(n=26) patients developed dysphagia and 8.6%(n=17) patients complained of neck swelling. More than half of the patients (52.9%, n=9) with neck swelling also had associated dysphagia; however, only 2 of these patients necessitated readmission. Both of these patients responded well to the intravenous dexamethasone. The use of DBM did not affect the incidence and severity of complications (p>0.05). Clinico-radiological evidence of fusion was not observed in 2 patients. Conclusion: A low-dose rhBMP-2 in ACFs is not without risk. However, the incidence and severity of complications seem to be lower with low-dose BMP placed exclusively inside the cage. Packing DBM putty around the BMP sponge does not affect the safety profile of rhBMP-2 in ACFs.
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