The vacuum die-casting process,started 25 years ago in Japan,has been widely applied.This technology contributes very much to improvement of castings quality.The main factor causing the defects of die castings is the ...The vacuum die-casting process,started 25 years ago in Japan,has been widely applied.This technology contributes very much to improvement of castings quality.The main factor causing the defects of die castings is the trapped air in the mold cavity,while the key technology of vacuum die-casting process is to avoid the trapped air effectively by evacuating the cavity before casting.At the same time,due to the shot speed and the casting pressure reduced in half,the service life of the die is prolonged and the productivity is enhanced,as well.Vacuum die-casting process is of great signif icance in improving the die castings quality and making up the shortcomings of super-high-speed shot casting.展开更多
As major policy put forward by the new leadership of China, urbanization will play an irreplaceable role in improving people's living standards and guaranteeing sustainable growth of economy. But in the process of ur...As major policy put forward by the new leadership of China, urbanization will play an irreplaceable role in improving people's living standards and guaranteeing sustainable growth of economy. But in the process of urbanization, there are many problems, such as environmental damage and ecological imbalance. Therefore, organic combination of eco-civilization construction and urbanization will be the key solving the problem. As one of preconditions of planning and project, environmental impact assessment will also play pivotal role in eco-civilization construction of urbani- zation in China. We detailedly introduce environmental impact assessment, and put forward how to effectively use environmental impact assessment for the eco-civilization construction of urbanization in China.展开更多
Objective: A community-based intervention study was conducted to examine the effect of consumption of JCM 5805 yogurt on influenza incidence rates and the cumulative incidence rates among schoolchildren in Iwate Prefe...Objective: A community-based intervention study was conducted to examine the effect of consumption of JCM 5805 yogurt on influenza incidence rates and the cumulative incidence rates among schoolchildren in Iwate Prefecture, Japan. Methods: Schoolchildren and their parents in Shizukuishi town were told of the purpose, frequency and duration of JCM 5805 yogurt administration. The number of elementary schoolchildren in Shizukuishi town was 780 while that of junior high school students in Shizukuishi town numbered 475. The number of elementary schoolchildren in neighboring town A was 208 and that of junior high school students in town A was 121. JCM 5805 yogurt was delivered three times a week to all elementary schools and junior high schools in Shizukuishi town from January 16 through March 18, 2015. The incidence rate was calculated every week as the maximum case number divided by the number of schoolchildren in each school. The cumulative incidence rate was calculated as the total case number during the period when JCM 5805 yogurt was delivered divided by the number of schoolchildren in each school. Results: JCM 5805 yogurt intake was associated with a two-thirds reduction in influenza incidence rates in Shizukuishi town schoolchildren compared with those of town A. Furthermore, the cumulative incidence rates of the elementary school and combined data from the elementary school and junior high school were significantly lower than those of neighbor town A. Conclusion: JCM 5805 yogurt intake reduced both the incidence rates and cumulative incidence rates of influenza.展开更多
Dwarf, late-heading (DL) Napier grass is suitable for both cut-and-carry and grazing management due to sufficient yield and quality potential. This species can hardly produce viable seed, and thus vegetative propagati...Dwarf, late-heading (DL) Napier grass is suitable for both cut-and-carry and grazing management due to sufficient yield and quality potential. This species can hardly produce viable seed, and thus vegetative propagation should be essential before winter in temperate regions of southern Kyushu. The objective of this study was to determine the efficient storage methods of DL vegetative propagation. Two experiments were carried out, the first focused on indoor storage of 10-node stem sections under room or chilling (10°C) conditions and the second, on underground storage of ten-node and one-node stem sections at 10 cm, 25 cm or 40 cm depth. After both storages, both of ten-node stem sections, cut into single nodes, and one-node stem sections were transplanted into the soil and counted for the emergence every month in 3 months of planting. In indoor-storage, while storage temperature hardly affected the emergence (P > 0.05), storage period significantly reduced the emergence percentage. In underground storage, while one-node storage achieved constantly 60% emergence, ten-node storage achieved a higher emergence at 80% under 25-cm and 40-cm depths. The results of the study suggest that underground storage of longer stem sections at 25 cm depth could be applied to practical vegetative propagation in the region.展开更多
The traditional superhydrophobic materials are not ideal for treating residual pollutants after oil-water separation. In this paper, a simple and economical method was developed for the fabrication of multi-functional...The traditional superhydrophobic materials are not ideal for treating residual pollutants after oil-water separation. In this paper, a simple and economical method was developed for the fabrication of multi-functional superhydrophobic materials PDVBx/TiO2 composites, through in situ polymerization. The performance of the superhydrophobic composite was studied. The results showed that the low surface energy of PDVB2.5/TiO2 composite with the micro-nano scale roughness would result in excellent superhydrophobicity. In addition, the PDVB2.5/TiO2 composite exhibits optimum effect on the degradation of methyl orange(MO) with the degradation efficiency of 97.8%. What is more, the applications of the composite materials could be expanded to other fields, such as the degradation of drug ciprofloxacin hydrochloride(CIP). Finally, we expanded the application of the PDVBx/TiO2 composites to tribology, and found its excellent performance in reducing wear and antiwear.展开更多
Background:Established treatments for non-alcoholic steatohepatitis (NASH) are few, thus it is imperative to develop novel dietary strategies that can prevent NASH. A fermented mixed tea (FMT) made with Camellia japon...Background:Established treatments for non-alcoholic steatohepatitis (NASH) are few, thus it is imperative to develop novel dietary strategies that can prevent NASH. A fermented mixed tea (FMT) made with Camellia japonica (Japanese camellia) and third- crop green tea leaves by tea-rolling processing was reported to reduce body weight and adipose tissue weight in Sprague-Dawley (SD) rats. Because visceral fat is one of the most important factors for the development of hepatic steatosis, this FMT supplementation can be a candidate dietary strategy for the prevention of NASH. Methods:Nine-week-old male SD rats were fed a high-fat and high-cholesterol (HFC) diets with or without FMT (camellia and third-crop green tea leaves at ratios of 1:5, 1:2 and 1:1) for 9 weeks (n=6–7/group). Histopathology, serology and expressions of ifbrogenetic, proinlfammatory, oxidative stress and lipid metabolism-related genes in the liver were evaluated. Results:Histologically, HFC diet with FMT at a ratio of 1:5 dramatically reduced NASH progression (14%) compared to the HFC diet without FMT (100%). FMT at a ratio of 1:5 reduced hepatic steatosis due to the activation of microsomal triglyceride transfer protein, and FMT at a ratio of 1:2 reduced mRNA levels of some proinlfammatory, lipid metabolism-related, ifbrogenic and oxidative stress marker genes. Conclusions:Our data suggest that FMT at a ratio of 1:5 or 1:2 likely possesses a preventive effect on NASH progression.展开更多
文摘The vacuum die-casting process,started 25 years ago in Japan,has been widely applied.This technology contributes very much to improvement of castings quality.The main factor causing the defects of die castings is the trapped air in the mold cavity,while the key technology of vacuum die-casting process is to avoid the trapped air effectively by evacuating the cavity before casting.At the same time,due to the shot speed and the casting pressure reduced in half,the service life of the die is prolonged and the productivity is enhanced,as well.Vacuum die-casting process is of great signif icance in improving the die castings quality and making up the shortcomings of super-high-speed shot casting.
文摘As major policy put forward by the new leadership of China, urbanization will play an irreplaceable role in improving people's living standards and guaranteeing sustainable growth of economy. But in the process of urbanization, there are many problems, such as environmental damage and ecological imbalance. Therefore, organic combination of eco-civilization construction and urbanization will be the key solving the problem. As one of preconditions of planning and project, environmental impact assessment will also play pivotal role in eco-civilization construction of urbani- zation in China. We detailedly introduce environmental impact assessment, and put forward how to effectively use environmental impact assessment for the eco-civilization construction of urbanization in China.
文摘Objective: A community-based intervention study was conducted to examine the effect of consumption of JCM 5805 yogurt on influenza incidence rates and the cumulative incidence rates among schoolchildren in Iwate Prefecture, Japan. Methods: Schoolchildren and their parents in Shizukuishi town were told of the purpose, frequency and duration of JCM 5805 yogurt administration. The number of elementary schoolchildren in Shizukuishi town was 780 while that of junior high school students in Shizukuishi town numbered 475. The number of elementary schoolchildren in neighboring town A was 208 and that of junior high school students in town A was 121. JCM 5805 yogurt was delivered three times a week to all elementary schools and junior high schools in Shizukuishi town from January 16 through March 18, 2015. The incidence rate was calculated every week as the maximum case number divided by the number of schoolchildren in each school. The cumulative incidence rate was calculated as the total case number during the period when JCM 5805 yogurt was delivered divided by the number of schoolchildren in each school. Results: JCM 5805 yogurt intake was associated with a two-thirds reduction in influenza incidence rates in Shizukuishi town schoolchildren compared with those of town A. Furthermore, the cumulative incidence rates of the elementary school and combined data from the elementary school and junior high school were significantly lower than those of neighbor town A. Conclusion: JCM 5805 yogurt intake reduced both the incidence rates and cumulative incidence rates of influenza.
文摘Dwarf, late-heading (DL) Napier grass is suitable for both cut-and-carry and grazing management due to sufficient yield and quality potential. This species can hardly produce viable seed, and thus vegetative propagation should be essential before winter in temperate regions of southern Kyushu. The objective of this study was to determine the efficient storage methods of DL vegetative propagation. Two experiments were carried out, the first focused on indoor storage of 10-node stem sections under room or chilling (10°C) conditions and the second, on underground storage of ten-node and one-node stem sections at 10 cm, 25 cm or 40 cm depth. After both storages, both of ten-node stem sections, cut into single nodes, and one-node stem sections were transplanted into the soil and counted for the emergence every month in 3 months of planting. In indoor-storage, while storage temperature hardly affected the emergence (P > 0.05), storage period significantly reduced the emergence percentage. In underground storage, while one-node storage achieved constantly 60% emergence, ten-node storage achieved a higher emergence at 80% under 25-cm and 40-cm depths. The results of the study suggest that underground storage of longer stem sections at 25 cm depth could be applied to practical vegetative propagation in the region.
基金supported by the Foundation of Shandong Training Project (Grant No. ZR2018PB014)Ph. D. Programs of Shandong Province (Grant No. ZR2014EL009)the PhD early development program of Liaocheng University (Grant Nos. 318051648, 318051709)
文摘The traditional superhydrophobic materials are not ideal for treating residual pollutants after oil-water separation. In this paper, a simple and economical method was developed for the fabrication of multi-functional superhydrophobic materials PDVBx/TiO2 composites, through in situ polymerization. The performance of the superhydrophobic composite was studied. The results showed that the low surface energy of PDVB2.5/TiO2 composite with the micro-nano scale roughness would result in excellent superhydrophobicity. In addition, the PDVB2.5/TiO2 composite exhibits optimum effect on the degradation of methyl orange(MO) with the degradation efficiency of 97.8%. What is more, the applications of the composite materials could be expanded to other fields, such as the degradation of drug ciprofloxacin hydrochloride(CIP). Finally, we expanded the application of the PDVBx/TiO2 composites to tribology, and found its excellent performance in reducing wear and antiwear.
基金a research and development:science and technology research promotion program for agriculture, forestry, fisheries and food industry.
文摘Background:Established treatments for non-alcoholic steatohepatitis (NASH) are few, thus it is imperative to develop novel dietary strategies that can prevent NASH. A fermented mixed tea (FMT) made with Camellia japonica (Japanese camellia) and third- crop green tea leaves by tea-rolling processing was reported to reduce body weight and adipose tissue weight in Sprague-Dawley (SD) rats. Because visceral fat is one of the most important factors for the development of hepatic steatosis, this FMT supplementation can be a candidate dietary strategy for the prevention of NASH. Methods:Nine-week-old male SD rats were fed a high-fat and high-cholesterol (HFC) diets with or without FMT (camellia and third-crop green tea leaves at ratios of 1:5, 1:2 and 1:1) for 9 weeks (n=6–7/group). Histopathology, serology and expressions of ifbrogenetic, proinlfammatory, oxidative stress and lipid metabolism-related genes in the liver were evaluated. Results:Histologically, HFC diet with FMT at a ratio of 1:5 dramatically reduced NASH progression (14%) compared to the HFC diet without FMT (100%). FMT at a ratio of 1:5 reduced hepatic steatosis due to the activation of microsomal triglyceride transfer protein, and FMT at a ratio of 1:2 reduced mRNA levels of some proinlfammatory, lipid metabolism-related, ifbrogenic and oxidative stress marker genes. Conclusions:Our data suggest that FMT at a ratio of 1:5 or 1:2 likely possesses a preventive effect on NASH progression.