The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
Soohee Chung - One of the best experts on this subject based on the ideXlab platform.
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Formulation of stable Bacillus subtilis AH18 against Temperature Fluctuation with highly heat-resistant endospores and micropore inorganic carriers
Applied Microbiology and Biotechnology, 2007Co-Authors: Soohee ChungAbstract:To survive the commercial market and to achieve the desired effect of beneficial organisms, the strains in microbial products must be cost-effectively formulated to remain dormant and hence survive through high and low Temperatures of the environment during transportation and storage. Dormancy and stability of Bacillus subtilis AH18 was achieved by producing endospores with enhanced heat resistance and using inorganic carriers. Heat stability assays, at 90°C for 1 h, showed that spores produced under a sublethal Temperature of 57°C was 100 times more heat-resistant than the ones produced by food depletion at the growing Temperature of 37°C. When these highly heat-resistant endospores were formulated with inorganic carriers of natural and synthetic zeolite or kaolin clay minerals having substantial amount of micropores, the dormancy of the endospores was maintained for 6 months at 15–25°C. Meanwhile, macroporous perlite carriers with average pore diameter larger than 3.7 μm stimulated the germination of the spores and rapid proliferation of the bacteria. These results indicated that a B. subtilis AH18 product that can remain dormant and survive through environmental Temperature Fluctuation can be formulated by producing heat-stressed endospores and incorporating inorganic carriers with micropores in the formulation step.
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formulation of stable bacillus subtilis ah18 against Temperature Fluctuation with highly heat resistant endospores and micropore inorganic carriers
Applied Microbiology and Biotechnology, 2007Co-Authors: Soohee Chung, Hyung Mi Lim, Sangdal KimAbstract:To survive the commercial market and to achieve the desired effect of beneficial organisms, the strains in microbial products must be cost-effectively formulated to remain dormant and hence survive through high and low Temperatures of the environment during transportation and storage. Dormancy and stability of Bacillus subtilis AH18 was achieved by producing endospores with enhanced heat resistance and using inorganic carriers. Heat stability assays, at 90 degrees C for 1 h, showed that spores produced under a sublethal Temperature of 57 degrees C was 100 times more heat-resistant than the ones produced by food depletion at the growing Temperature of 37 degrees C. When these highly heat-resistant endospores were formulated with inorganic carriers of natural and synthetic zeolite or kaolin clay minerals having substantial amount of micropores, the dormancy of the endospores was maintained for 6 months at 15-25 degrees C. Meanwhile, macroporous perlite carriers with average pore diameter larger than 3.7 microm stimulated the germination of the spores and rapid proliferation of the bacteria. These results indicated that a B. subtilis AH18 product that can remain dormant and survive through environmental Temperature Fluctuation can be formulated by producing heat-stressed endospores and incorporating inorganic carriers with micropores in the formulation step.
Sangdal Kim - One of the best experts on this subject based on the ideXlab platform.
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formulation of stable bacillus subtilis ah18 against Temperature Fluctuation with highly heat resistant endospores and micropore inorganic carriers
Applied Microbiology and Biotechnology, 2007Co-Authors: Soohee Chung, Hyung Mi Lim, Sangdal KimAbstract:To survive the commercial market and to achieve the desired effect of beneficial organisms, the strains in microbial products must be cost-effectively formulated to remain dormant and hence survive through high and low Temperatures of the environment during transportation and storage. Dormancy and stability of Bacillus subtilis AH18 was achieved by producing endospores with enhanced heat resistance and using inorganic carriers. Heat stability assays, at 90 degrees C for 1 h, showed that spores produced under a sublethal Temperature of 57 degrees C was 100 times more heat-resistant than the ones produced by food depletion at the growing Temperature of 37 degrees C. When these highly heat-resistant endospores were formulated with inorganic carriers of natural and synthetic zeolite or kaolin clay minerals having substantial amount of micropores, the dormancy of the endospores was maintained for 6 months at 15-25 degrees C. Meanwhile, macroporous perlite carriers with average pore diameter larger than 3.7 microm stimulated the germination of the spores and rapid proliferation of the bacteria. These results indicated that a B. subtilis AH18 product that can remain dormant and survive through environmental Temperature Fluctuation can be formulated by producing heat-stressed endospores and incorporating inorganic carriers with micropores in the formulation step.
G Lettinga - One of the best experts on this subject based on the ideXlab platform.
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effect of Temperature and Temperature Fluctuation on thermophilic anaerobic digestion of cattle manure
Bioresource Technology, 2004Co-Authors: Hamed M Elmashad, G Zeeman, Wilko K P Van Loon, G P A Bot, G LettingaAbstract:The influence of Temperature, 50 and 60 °C, at hydraulic retention times (HRTs) of 20 and 10 days, on the performance of anaerobic digestion of cow manure has been investigated in completely stirred tank reactors (CSTRs). Furthermore, the effect of both daily downward and daily upward Temperature Fluctuations has been studied. In the daily downward Temperature Fluctuation regime the Temperatures of each reactor was reduced by 10 °C for 10 h while in the daily upward Fluctuation regime the Temperature of each reactor was increased 10 °C for 5 h. The results show that the methane production rate at 60 °C is lower than that at 50 °C at all experimental conditions of imposed HRT except when downward Temperature Fluctuations were applied at an HRT of 10 days. It also was found that the free ammonia concentration not only affects the acetate-utilising bacteria but also the hydrolysis and acidification process. The upward Temperature Fluctuation affects the maximum specific methanogenesis activity more severely as compared to imposed downward Temperature Fluctuations. The results clearly reveal the possibility of using available solar energy at daytime to heat up the reactor(s) without the need of heat storage during nights, especially at an operational Temperature of 50 °C and at a 20 days HRT, and without the jeopardising of the overheating.
Min Zhang - One of the best experts on this subject based on the ideXlab platform.
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Responses of phytoplankton species to diel Temperature Fluctuation patterns
Phycological Research, 2019Co-Authors: Min Zhang, Yue Guan, Baoli Qin, Xulin WangAbstract:Diel Temperature Fluctuation might promote the dominance of cyanobacteria and result in the advance of bloom onset timing in spring. However, knowledge of how Temperature Fluctuations impact phytoplankton shift and then favor cyanobacterial growth in spring is limited. In this study, we analyzed photosynthesis and growth responses of phytoplankton species to different Temperature Fluctuation patterns in the laboratory. We also performed daily monitoring to detect the relationship between phytoplankton groups and diel Temperature Fluctuations. The results of the laboratory experiments suggested that the photosynthetic performance and growth rate of Microcystis aeruginosa were better adapted to Temperature Fluctuations than those of Chlorella pyrenoidosa and Cyclotella meneghiniana. Temperature Fluctuations slowed the proliferation of Ch. pyrenoidosa and Cy. meneghiniana, while promoting M. aeruginosa. Moreover, the response dynamics of different phytoplankton species to diel Temperature Fluctuations depended on the mean Temperature. The results from the field also indicated that there was a positive relationship between cyanobacterial biomass and diel Temperature Fluctuations. Our study offers further understanding of the effect of Temperature Fluctuation on phytoplankton composition shift and the formation of cyanobacterial dominance in spring.
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effects of Temperature Fluctuation on the development of cyanobacterial dominance in spring implication of future climate change
Hydrobiologia, 2016Co-Authors: Min Zhang, Baoli Qin, Zhen Yang, Xiaoli Shi, Fanxiang KongAbstract:Global warming is predicted to increase the intensity and frequency of short-term Temperature Fluctuation. However, the effect of Temperature Fluctuation on phytoplankton is rarely considered. We analyzed the effect of fluctuating Temperature on cyanobacterial dominance and blooms in spring (March–May) with long-term data analyses, laboratory simulation, and field observation. Our results showed that the magnitude of air Temperature Fluctuation in spring has increased in Lake Taihu over the past 58 years (1956–2013) and was negatively correlated with cyanobacterial blooms onset time (1987–2013). Air Temperature Fluctuation was one of the predictors of the best model for the variability in the bloom size in spring (2000–2011). The results from the field observation (2009–2013) also indicated that there was a positive correlation between diel air Temperature difference and the ratio of cyanobacteria to total algae. Laboratory experiments suggested that water Temperature Fluctuation slowed the growth rates of Chlorella pyrenoidosa and Cyclotella meneghiniana but not Microcystis aeruginosa, which confirmed our findings of field observation and long-term data analysis. Therefore, the increased Temperature Fluctuation under global warming may promote cyanobacterial dominance. Our findings provide further understanding of inter-annual difference of cyanobacterial blooms onset time in the warming world.
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CCTA - Measurement System of Reducing Temperature Fluctuation of Thermostat Bath for Calibrating Thermocouple
Computer and Computing Technologies in Agriculture VIII, 2015Co-Authors: Min Zhang, Liang Feixia, Xie Yue, Huang Ruguo, Yuan HaitaoAbstract:Based on the periodic unsteady state heat conduction theory, a new measurement system of reducing Temperature Fluctuation of thermostat bath was developed in order to obtain a liquid environment with uniform and constant Temperature controlled for the measurement requirements of calibrating thermocouple. The experimental results show that the Temperature stability in this measurement system is superior to that in traditional system. The measurement system had the advantage of calibrating multipoint thermocouple at the same time and completing the data acquisition and control automatically.
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Measurement System of Reducing Temperature Fluctuation of Thermostat Bath for Calibrating Thermocouple
2014Co-Authors: Min Zhang, Feixia Liang, Yue Xie, Ruguo Huang, Haitao YuanAbstract:Based on the periodic unsteady state heat conduction theory, a new measurement system of reducing Temperature Fluctuation of thermostat bath was developed in order to obtain a liquid environment with uniform and constant Temperature controlled for the measurement requirements of calibrating thermocouple. The experimental results show that the Temperature stability in this measurement system is superior to that in traditional system. The measurement system had the advantage of calibrating multipoint thermocouple at the same time and completing the data acquisition and control automatically.
Hyung Mi Lim - One of the best experts on this subject based on the ideXlab platform.
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formulation of stable bacillus subtilis ah18 against Temperature Fluctuation with highly heat resistant endospores and micropore inorganic carriers
Applied Microbiology and Biotechnology, 2007Co-Authors: Soohee Chung, Hyung Mi Lim, Sangdal KimAbstract:To survive the commercial market and to achieve the desired effect of beneficial organisms, the strains in microbial products must be cost-effectively formulated to remain dormant and hence survive through high and low Temperatures of the environment during transportation and storage. Dormancy and stability of Bacillus subtilis AH18 was achieved by producing endospores with enhanced heat resistance and using inorganic carriers. Heat stability assays, at 90 degrees C for 1 h, showed that spores produced under a sublethal Temperature of 57 degrees C was 100 times more heat-resistant than the ones produced by food depletion at the growing Temperature of 37 degrees C. When these highly heat-resistant endospores were formulated with inorganic carriers of natural and synthetic zeolite or kaolin clay minerals having substantial amount of micropores, the dormancy of the endospores was maintained for 6 months at 15-25 degrees C. Meanwhile, macroporous perlite carriers with average pore diameter larger than 3.7 microm stimulated the germination of the spores and rapid proliferation of the bacteria. These results indicated that a B. subtilis AH18 product that can remain dormant and survive through environmental Temperature Fluctuation can be formulated by producing heat-stressed endospores and incorporating inorganic carriers with micropores in the formulation step.
