Solar thermochemical energy storage based on calcium looping(CaL)process is a promising technology for next-generation concentrated solar power(CSP)systems.However,conventional calcium carbonate(CaCO_(3))pellets suffe...Solar thermochemical energy storage based on calcium looping(CaL)process is a promising technology for next-generation concentrated solar power(CSP)systems.However,conventional calcium carbonate(CaCO_(3))pellets suffer from slow reaction kinetics,poor stability,and low solar absorptance.Here,we successfully realized high power density and highly stable solar thermochemical energy storage/release by synergistically accelerating energy storage/release via binary sulfate and promoting cycle stability,mechanical strength,and solar absorptance via Al–Mn–Fe oxides.The energy storage density of proposed CaCO_(3)pellets is still as high as 1455 kJ kg^(-1)with only a slight decay rate of 4.91%over 100 cycles,which is higher than that of state-of-the-art pellets in the literature,in stark contrast to 69.9%of pure CaCO_(3)pellets over 35 cycles.Compared with pure CaCO_(3),the energy storage power density or decomposition rate is improved by 120%due to lower activation energy and promotion of Ca^(2+)diffusion by binary sulfate.The energy release or carbonation rate rises by 10%because of high O^(2-)transport ability of molten binary sulfate.Benefiting from fast energy storage/release rate and high solar absorptance,thermochemical energy storage efficiency is enhanced by more than 50%under direct solar irradiation.This work paves the way for application of direct solar thermochemical energy storage techniques via achieving fast energy storage/release rate,high energy density,good cyclic stability,and high solar absorptance simultaneously.展开更多
[Objective]The paper was to study the effects of calcium lignosulfonate(CaLS)on feed processing performance,growth performance,slaughter performance and antioxidant function of cherry valley duck.[Method]A total of 48...[Objective]The paper was to study the effects of calcium lignosulfonate(CaLS)on feed processing performance,growth performance,slaughter performance and antioxidant function of cherry valley duck.[Method]A total of 48010-day-old cherry valley ducks were selected and randomly divided into four treatments,10 replicates each treatment and 12 meat ducks each replicate(half male and half female).The ducks in control group were fed with basal diet,and those in experimental groups were fed with the basal diet adding 0.2%,0.4%and 0.6%CaLS,respetively.The trial lasted 28 d.[Result](1)CaLS significantly reduced feed pulverization rate of meat duck(F<0.05),and significantly increased PDI and starch gelatinization degree(F<0.05);adding CaLS had no significant impact on the processing cost(F>0.05),but the granulation electric charge per ton feed could be reduced by 1.06 yuan.(2)CaLS had no significant effect on growth performance,slaughter performance and organ index of meat duck(Q0.05).(3)Compared with the control group,there were no significant differences in serum GSH-Px,T-SOD,T-AOC activities and MDA content of three CaLS groups(F>0.05).[Conclusion]CaLS could improve the processing quality of meat duck feed and reduce the processing cost,hut could not improve the growth performance,slaughter performance and antioxidant function of meat duck.展开更多
This paper presents the effect on compressive strength and self-healing capability of bacterial concrete with the addition of calcium lactate.Compared to normal concrete,bacterial concrete possesses higher durability ...This paper presents the effect on compressive strength and self-healing capability of bacterial concrete with the addition of calcium lactate.Compared to normal concrete,bacterial concrete possesses higher durability and engineering concrete properties.The production of calcium carbonate in bacterial concrete is limited to the calcium content in cement.Hence calcium lactate is externally added to be an additional source of calcium in the concrete.The influence of this addition on compressive strength,self-healing capability of cracks is highlighted in this study.The bacterium used in the study is bacillus subtilis and was added to both spore powder form and culture form to the concrete.Bacillus subtilis spore powder of 2 million cfu/g concentration with 0.5%cement was mixed to concrete.Calcium lactates with concentrations of 0.5%,1.0%,1.5%,2.0%,and 2.5%of cement,was added to the concrete mixes to test the effect on properties of concrete.In other samples,cultured bacillus subtilis with a concentration of 1×10^cells/mL was mixed with concrete,to study the effect of bacteria in the cultured form on the properties of concrete.Cubes of 100 mm×100 mm×100 mm were used for the study.These cubes were tested after a curing period of 7,14,and 28 d.A maximum of 12%increase in compressive strength was observed with the addition of 0.5%of calcium lactate in concrete.Scanning electron microscope and energy dispersive X-ray spectroscopy examination showed the formation of ettringite in pores;calcium silicate hydrates and calcite which made the concrete denser.A statistical technique was applied to analyze the experimental data of the compressive strengths of cementations materials.Response surface methodology was adopted for optimizing the experimental data.The regression equation was yielded by the application of response surface methodology relating response variables to input parameters.This method aids in predicting the experimental results accurately with an acceptable range of error.Findings of this investigation indicated the influence of added calcium lactate in bio-concrete which is quite impressive for improving the compressive strength and self-healing properties of concrete.展开更多
哺乳期是机体钙磷代谢的一个特殊时期。在此阶段,母体钙磷和骨代谢状态在钙磷调节激素的作用下发生一系列变化,以期通过母乳为新生儿提供充足的钙质。本文就哺乳期产妇钙磷代谢及骨密度变化特点进行综述。研究表明,哺乳期间母体血钙水...哺乳期是机体钙磷代谢的一个特殊时期。在此阶段,母体钙磷和骨代谢状态在钙磷调节激素的作用下发生一系列变化,以期通过母乳为新生儿提供充足的钙质。本文就哺乳期产妇钙磷代谢及骨密度变化特点进行综述。研究表明,哺乳期间母体血钙水平保持正常,血磷水平轻度升高,同时,骨吸收和骨形成指标升高,并出现短暂性骨密度丢失,这些变化与升高的甲状旁腺激素相关蛋白(parathyroid hormone related protein,PTHrP)、泌乳素(prolactin,PRL)水平及低水平的雌二醇(estradiol,E2)有关。但随着停止哺乳、月经复潮,产妇骨代谢水平、骨密度逐渐恢复至孕前水平。展开更多
基金supported by the National Natural Science Foundation of China[No.51820105010 and 51888103]support from Jiangsu Province(No.BK20202008,BE2022024,BE2022602,BK20220001,BK20220009,and BK20220077).
文摘Solar thermochemical energy storage based on calcium looping(CaL)process is a promising technology for next-generation concentrated solar power(CSP)systems.However,conventional calcium carbonate(CaCO_(3))pellets suffer from slow reaction kinetics,poor stability,and low solar absorptance.Here,we successfully realized high power density and highly stable solar thermochemical energy storage/release by synergistically accelerating energy storage/release via binary sulfate and promoting cycle stability,mechanical strength,and solar absorptance via Al–Mn–Fe oxides.The energy storage density of proposed CaCO_(3)pellets is still as high as 1455 kJ kg^(-1)with only a slight decay rate of 4.91%over 100 cycles,which is higher than that of state-of-the-art pellets in the literature,in stark contrast to 69.9%of pure CaCO_(3)pellets over 35 cycles.Compared with pure CaCO_(3),the energy storage power density or decomposition rate is improved by 120%due to lower activation energy and promotion of Ca^(2+)diffusion by binary sulfate.The energy release or carbonation rate rises by 10%because of high O^(2-)transport ability of molten binary sulfate.Benefiting from fast energy storage/release rate and high solar absorptance,thermochemical energy storage efficiency is enhanced by more than 50%under direct solar irradiation.This work paves the way for application of direct solar thermochemical energy storage techniques via achieving fast energy storage/release rate,high energy density,good cyclic stability,and high solar absorptance simultaneously.
文摘[Objective]The paper was to study the effects of calcium lignosulfonate(CaLS)on feed processing performance,growth performance,slaughter performance and antioxidant function of cherry valley duck.[Method]A total of 48010-day-old cherry valley ducks were selected and randomly divided into four treatments,10 replicates each treatment and 12 meat ducks each replicate(half male and half female).The ducks in control group were fed with basal diet,and those in experimental groups were fed with the basal diet adding 0.2%,0.4%and 0.6%CaLS,respetively.The trial lasted 28 d.[Result](1)CaLS significantly reduced feed pulverization rate of meat duck(F<0.05),and significantly increased PDI and starch gelatinization degree(F<0.05);adding CaLS had no significant impact on the processing cost(F>0.05),but the granulation electric charge per ton feed could be reduced by 1.06 yuan.(2)CaLS had no significant effect on growth performance,slaughter performance and organ index of meat duck(Q0.05).(3)Compared with the control group,there were no significant differences in serum GSH-Px,T-SOD,T-AOC activities and MDA content of three CaLS groups(F>0.05).[Conclusion]CaLS could improve the processing quality of meat duck feed and reduce the processing cost,hut could not improve the growth performance,slaughter performance and antioxidant function of meat duck.
文摘This paper presents the effect on compressive strength and self-healing capability of bacterial concrete with the addition of calcium lactate.Compared to normal concrete,bacterial concrete possesses higher durability and engineering concrete properties.The production of calcium carbonate in bacterial concrete is limited to the calcium content in cement.Hence calcium lactate is externally added to be an additional source of calcium in the concrete.The influence of this addition on compressive strength,self-healing capability of cracks is highlighted in this study.The bacterium used in the study is bacillus subtilis and was added to both spore powder form and culture form to the concrete.Bacillus subtilis spore powder of 2 million cfu/g concentration with 0.5%cement was mixed to concrete.Calcium lactates with concentrations of 0.5%,1.0%,1.5%,2.0%,and 2.5%of cement,was added to the concrete mixes to test the effect on properties of concrete.In other samples,cultured bacillus subtilis with a concentration of 1×10^cells/mL was mixed with concrete,to study the effect of bacteria in the cultured form on the properties of concrete.Cubes of 100 mm×100 mm×100 mm were used for the study.These cubes were tested after a curing period of 7,14,and 28 d.A maximum of 12%increase in compressive strength was observed with the addition of 0.5%of calcium lactate in concrete.Scanning electron microscope and energy dispersive X-ray spectroscopy examination showed the formation of ettringite in pores;calcium silicate hydrates and calcite which made the concrete denser.A statistical technique was applied to analyze the experimental data of the compressive strengths of cementations materials.Response surface methodology was adopted for optimizing the experimental data.The regression equation was yielded by the application of response surface methodology relating response variables to input parameters.This method aids in predicting the experimental results accurately with an acceptable range of error.Findings of this investigation indicated the influence of added calcium lactate in bio-concrete which is quite impressive for improving the compressive strength and self-healing properties of concrete.
文摘哺乳期是机体钙磷代谢的一个特殊时期。在此阶段,母体钙磷和骨代谢状态在钙磷调节激素的作用下发生一系列变化,以期通过母乳为新生儿提供充足的钙质。本文就哺乳期产妇钙磷代谢及骨密度变化特点进行综述。研究表明,哺乳期间母体血钙水平保持正常,血磷水平轻度升高,同时,骨吸收和骨形成指标升高,并出现短暂性骨密度丢失,这些变化与升高的甲状旁腺激素相关蛋白(parathyroid hormone related protein,PTHrP)、泌乳素(prolactin,PRL)水平及低水平的雌二醇(estradiol,E2)有关。但随着停止哺乳、月经复潮,产妇骨代谢水平、骨密度逐渐恢复至孕前水平。
