The bactericidal effect on the representative type of Gram-negative Escherichia coli（E.coli） and Gram-positive Bacillus subtilis in drinking water was investigated in this paper by using dielectric barrier discharge...The bactericidal effect on the representative type of Gram-negative Escherichia coli（E.coli） and Gram-positive Bacillus subtilis in drinking water was investigated in this paper by using dielectric barrier discharge（DBD） advanced oxidation technology.The sterilizing rates under different conditions of reaction time t,input voltage V,p H value,and initial concentration of bacteria C_0 were investigated to figure out the optimum sterilization conditions.Our observations and comparisons of cell morphology alteration by scanning electron microscopy and transmission electron microscopy revealed the sterilization mechanisms.The results showed that the sterilizing rate increased obviously with the extension of reaction time t and the rise of input voltage V.The optimal sterilization effect was achieved when the p H value was 7.1.As the initial concentration of bacteria rose,the sterilizing rate decreased.When the input voltage was 2.2 k V and the initial concentration of bacteria was relatively low,the sterilizing rate almost reached 100% after a certain treatment time in neutral aqueous solution.The reasons for the great damage of cell structure and the killing of bacteria are the oxidation of O_3,OH and the accumulation of active species produced by DBD.The article provides a certain theoretical and experimental basis for DBD application in water pollution treatment.展开更多
Objective To investigate the correlation between drinking behavior combined with polymorphisms of extracellular superoxide dismutase （EC-SOD） and aldehyde dehydrogenase-2 （ALDH2） genes and pancreatic cancer. Meth...Objective To investigate the correlation between drinking behavior combined with polymorphisms of extracellular superoxide dismutase （EC-SOD） and aldehyde dehydrogenase-2 （ALDH2） genes and pancreatic cancer. Methods The genetic polymorphisms of EC-SOD and ALDH2 were analyzed by polymerase chain reaction restriction fragment length polymorphism in the peripheral blood leukocytes obtained from 680 pancreatic cancer cases and 680 non-cancer controls. Subsequently the frequency of genotype was compared between the pancreatic cancer patients and the healthy controls.The relationship of drinking with pancreatic cancer was analyzed. Results The frequencies of EC-SOD （C/G） and ALDH2 variant genotypes were 37.35% and 68.82% respectively in the pancreatic cancer cases, and were significantly higher than those in the healthy controls （21.03% and 44.56%, all P〈0.01）. People who carried EC-SOD （C/G） （0R=2.24, 95% C1= 1.81-4.03, P〈0.01） or ALDH2 variant genotypes （OR=2.75, 95% CI=1.92-4.47, P〈0.01） had a high risk to develop pancreatic cancer. Those who carried EC-SOD （C/G） genotype combined with ALDH2 variant genotype had a high risk for pancreatic cancer （29.56% vs. 6.76%, 0R=7.69, 95% CI=3.58-10.51, P〈0.01）. The drinking rate of the pancreatic cancer group （64.12%） was significantly higher than that of the control group （40.15%; OR=2.66, 95% CI=1.30-4.42, P〈0.01）. An interaction between drinking and EC-SOD （C/G）/ALDH2 variant genotypes increased the risk of occurrence of pancreatic cancer （OR=25.00, 95% CI= 11.87-35.64, P〈0.01）. Conclusion EC-SOD （C/G）, ALDH2 variant genotypes and drinking might be the risk factors of pancreatic cancer.展开更多
No one sets out to refresh themselves by drinking plastic. But microscopic pollution are in virtually every body of water on Earth. While the debris comes from a number of sources, including food and drink packaging a...No one sets out to refresh themselves by drinking plastic. But microscopic pollution are in virtually every body of water on Earth. While the debris comes from a number of sources, including food and drink packaging and cosmetics, research is pointing to synthetic textile microfibers as a major culprit. Studies show hundreds of thousands of microplastic particles can enter the wa-ter supply just by laundering that polo shirt, midi dress or yoga pants.展开更多
Are you thirsty?What do you drink?Some people drink milk often.Others never drink it.But it is good for you.It has calcium in it.Calcium makes your bones and your teeth strong.Plain milk is fine for some people.Others...Are you thirsty?What do you drink?Some people drink milk often.Others never drink it.But it is good for you.It has calcium in it.Calcium makes your bones and your teeth strong.Plain milk is fine for some people.Others like chocolate milk,strawberry milk or banana milk.What kind of milk do you like?展开更多
An exploratory study was conducted on the housing pattern and food habit of the Mro tribe in Bandarban region, Bangladesh, highlighting their indigenous knowledge. The study was carried out with respect to three incom...An exploratory study was conducted on the housing pattern and food habit of the Mro tribe in Bandarban region, Bangladesh, highlighting their indigenous knowledge. The study was carried out with respect to three income groups. A total of 36 households (12 from each income groups) were assessed using different participatory appraisals through semi-structured questionnaires. A special type of indigenous knowledge on housing pattern and food habit was explored in the Mro community, which correspond to the severe dependence on forest resources.展开更多
Demand response(DR) is gaining more and more importance in the architecture of power systems in a context of flexible loads and high share of intermittent generation. Changes in electricity markets regulation in sever...Demand response(DR) is gaining more and more importance in the architecture of power systems in a context of flexible loads and high share of intermittent generation. Changes in electricity markets regulation in several countries have recently enabled an effective integration of DR mechanisms in power systems. Through its flexible components(pumps, tanks), drinking water systems are suitable candidates for energy-efficient DR mechanisms. However, these systems are often managed independently of power system operation for both economic and operational reasons. Indeed, a sufficient level of economic viability and water demands risk management are necessary for water utilities to integrate their flexibilities to power system operation. In this paper,we proposed a mathematical model for optimizing pump schedules in water systems while trading DR blocs in a spot power market during peak times. Uncertainties about water demands were considered in the mathematical model allowing to propose power reductions covering the potential risk of real-time water demand forecasting inaccuracy.Numerical results were discussed on a real water system in France, demonstrating both economic and ecological benefits.展开更多
The present experiment was designed to investigatethe effect of oral mungbean on the tumorogenesisin experimental mice.Hybrid mice weighing 20-22g were randomly distributed into several groups.Morpholine（0.635%）was ...The present experiment was designed to investigatethe effect of oral mungbean on the tumorogenesisin experimental mice.Hybrid mice weighing 20-22g were randomly distributed into several groups.Morpholine（0.635%）was supplemented with the basicdiet.N<sub>2</sub>NO<sub>2</sub>（0. 02%）was dissolved in drinking wateradjusted to pH7.0.Test diets were prepared by supple-ment of various levels（3%,5%,or 10%）of mungbeanwith the basic diet in addition to morpholine Same展开更多
Nasreddin was a poor man, so he tried to grow asmany vegetables as he could in his own garden, so thathe would not have to buy so many in the market. One evening he heard a noise in his garden and lookedout of the win...Nasreddin was a poor man, so he tried to grow asmany vegetables as he could in his own garden, so thathe would not have to buy so many in the market. One evening he heard a noise in his garden and lookedout of the window. A white ox had got into the gardenand was eating his vegetables. Nasreddin at once took展开更多
1. A man trained his dog to go around the corner toBud’s Lounge every day with two dollar bills under hiscol1ar to get a pack of cigarettes. Once the man only hada five, so he put it under the collar and set the dog ...1. A man trained his dog to go around the corner toBud’s Lounge every day with two dollar bills under hiscol1ar to get a pack of cigarettes. Once the man only hada five, so he put it under the collar and set the dog onhis way. An hour passed and the dog still hadn’t returned.So the man went to Bud’s and found his dog sitting on展开更多
The church bells began to ring.It was a Sunday morningin January.Frau Goldeck was slowly drinking a cup of hot cof-fee in her kitchen.There was a fire in the stove,but it had notbeen lit very long and the room was sti...The church bells began to ring.It was a Sunday morningin January.Frau Goldeck was slowly drinking a cup of hot cof-fee in her kitchen.There was a fire in the stove,but it had notbeen lit very long and the room was still cold.Frau Goldeckwas wearing heavy woolen clothes.Every few seconds,shelooked at a clock hanging on the wall.She was waiting for展开更多
The story of silk is a fascinating one. About 4,000 years ago the Chinese discovered thesecret of the cocoon. No one knows exactly how or whenthis important discovery was made. One story says that ayoung princess was ...The story of silk is a fascinating one. About 4,000 years ago the Chinese discovered thesecret of the cocoon. No one knows exactly how or whenthis important discovery was made. One story says that ayoung princess was drinking tea in her garden andwatching the silkworms spin cocoons. By chance one drop-ped into her tea and the hot liquid softened it. When thegirl tried to take the cocoon out of her tea it unraveledand she pulled out a long silk thread.展开更多
五十四各种比喻(like) 英语中的明喻成语除了用as来引导喻体以外,还可以用like来引导。有的成语可以用于字面意义,例如,clever like a fox,表示象“狐狸一样聪明”;更多的成语可以用于比喻意义,例如,drinking like a fish,表示“大喝,...五十四各种比喻(like) 英语中的明喻成语除了用as来引导喻体以外,还可以用like来引导。有的成语可以用于字面意义,例如,clever like a fox,表示象“狐狸一样聪明”;更多的成语可以用于比喻意义,例如,drinking like a fish,表示“大喝,牛饮”,因为事实上鱼喝的水并不太多。我们可以顺便注意一下,汉语里用的是“牛”而不是“鱼”。有时候,同样的喻体可以表示不同的意义,例如,fight like cats and dogs(大打出手),rain cats and dogs(大雨倾盆)。展开更多
turn 用作名词时可以和不少介词构成介词短语,使用时须注意各短语意义上的细微差别。1.at every turn 每次,总是,到处,主要表示事情发生的频率。例如:1)Because of his drinking,the man was refused a job at every turn.由于酗酒,那...turn 用作名词时可以和不少介词构成介词短语,使用时须注意各短语意义上的细微差别。1.at every turn 每次,总是,到处,主要表示事情发生的频率。例如:1)Because of his drinking,the man was refused a job at every turn.由于酗酒,那人每次找工作都遭到拒绝。2)Life holds new adventures at every turn.生活中处处有新的风险。2.by turn 交替地,轮流地,一会儿……一会儿,其含义为:有规律地轮换,根据一个重复性的计划而一个接一个或一个替换另一个。通常位于句末,turn 为复数。例如:展开更多
英语中,冠词虽然只有 a(an)和 the 两个,但用法极为灵活。冠词的用法在中学教材中已作了详细说明,这里笔者仅对教材中没有明确提出的不用冠词的几种特殊情况作一补充归纳,以便同学们学习参考。一、当一个词不指它的意义,而只指它是一个...英语中,冠词虽然只有 a(an)和 the 两个,但用法极为灵活。冠词的用法在中学教材中已作了详细说明,这里笔者仅对教材中没有明确提出的不用冠词的几种特殊情况作一补充归纳,以便同学们学习参考。一、当一个词不指它的意义,而只指它是一个单词时,该词前不用冠词。展开更多
英语中有许多不同的词搭配在一起时往往会有与原来不同的含义,这时,我们就须特别注意,否则就会闹笑话。如:I have a sweet tooth.译作“我有一个颗甜牙。”显然不通。其实,have a sweet tooth是指“爱吃甜品”。下面我们再看几个类似的...英语中有许多不同的词搭配在一起时往往会有与原来不同的含义,这时,我们就须特别注意,否则就会闹笑话。如:I have a sweet tooth.译作“我有一个颗甜牙。”显然不通。其实,have a sweet tooth是指“爱吃甜品”。下面我们再看几个类似的搭配。展开更多
Wine culture is considered as an indispensible part of the culture in different countries. Distinctive differences exist between Chinese wine culture and the wine culture in western countries due to their historical b...Wine culture is considered as an indispensible part of the culture in different countries. Distinctive differences exist between Chinese wine culture and the wine culture in western countries due to their historical backgrounds, different values, cultures and customs, etc. A general study of the comparison between Chinese wine culture and western wine culture is given in this paper in order to help us have a better understanding of the wine culture and make us be aware of showing mutual respect for each other.展开更多
基金supported by the Science and Technology Support Project Plan and Social Development of Jiangsu Province,China(No.BE2011732)the Science and Technology Support Project Plan and Social Development of Zhenjiang,Jiangsu Province,China(No.SH2012013)
文摘The bactericidal effect on the representative type of Gram-negative Escherichia coli（E.coli） and Gram-positive Bacillus subtilis in drinking water was investigated in this paper by using dielectric barrier discharge（DBD） advanced oxidation technology.The sterilizing rates under different conditions of reaction time t,input voltage V,p H value,and initial concentration of bacteria C_0 were investigated to figure out the optimum sterilization conditions.Our observations and comparisons of cell morphology alteration by scanning electron microscopy and transmission electron microscopy revealed the sterilization mechanisms.The results showed that the sterilizing rate increased obviously with the extension of reaction time t and the rise of input voltage V.The optimal sterilization effect was achieved when the p H value was 7.1.As the initial concentration of bacteria rose,the sterilizing rate decreased.When the input voltage was 2.2 k V and the initial concentration of bacteria was relatively low,the sterilizing rate almost reached 100% after a certain treatment time in neutral aqueous solution.The reasons for the great damage of cell structure and the killing of bacteria are the oxidation of O_3,OH and the accumulation of active species produced by DBD.The article provides a certain theoretical and experimental basis for DBD application in water pollution treatment.
文摘Objective To investigate the correlation between drinking behavior combined with polymorphisms of extracellular superoxide dismutase （EC-SOD） and aldehyde dehydrogenase-2 （ALDH2） genes and pancreatic cancer. Methods The genetic polymorphisms of EC-SOD and ALDH2 were analyzed by polymerase chain reaction restriction fragment length polymorphism in the peripheral blood leukocytes obtained from 680 pancreatic cancer cases and 680 non-cancer controls. Subsequently the frequency of genotype was compared between the pancreatic cancer patients and the healthy controls.The relationship of drinking with pancreatic cancer was analyzed. Results The frequencies of EC-SOD （C/G） and ALDH2 variant genotypes were 37.35% and 68.82% respectively in the pancreatic cancer cases, and were significantly higher than those in the healthy controls （21.03% and 44.56%, all P〈0.01）. People who carried EC-SOD （C/G） （0R=2.24, 95% C1= 1.81-4.03, P〈0.01） or ALDH2 variant genotypes （OR=2.75, 95% CI=1.92-4.47, P〈0.01） had a high risk to develop pancreatic cancer. Those who carried EC-SOD （C/G） genotype combined with ALDH2 variant genotype had a high risk for pancreatic cancer （29.56% vs. 6.76%, 0R=7.69, 95% CI=3.58-10.51, P〈0.01）. The drinking rate of the pancreatic cancer group （64.12%） was significantly higher than that of the control group （40.15%; OR=2.66, 95% CI=1.30-4.42, P〈0.01）. An interaction between drinking and EC-SOD （C/G）/ALDH2 variant genotypes increased the risk of occurrence of pancreatic cancer （OR=25.00, 95% CI= 11.87-35.64, P〈0.01）. Conclusion EC-SOD （C/G）, ALDH2 variant genotypes and drinking might be the risk factors of pancreatic cancer.
文摘No one sets out to refresh themselves by drinking plastic. But microscopic pollution are in virtually every body of water on Earth. While the debris comes from a number of sources, including food and drink packaging and cosmetics, research is pointing to synthetic textile microfibers as a major culprit. Studies show hundreds of thousands of microplastic particles can enter the wa-ter supply just by laundering that polo shirt, midi dress or yoga pants.
文摘Are you thirsty?What do you drink?Some people drink milk often.Others never drink it.But it is good for you.It has calcium in it.Calcium makes your bones and your teeth strong.Plain milk is fine for some people.Others like chocolate milk,strawberry milk or banana milk.What kind of milk do you like?
文摘An exploratory study was conducted on the housing pattern and food habit of the Mro tribe in Bandarban region, Bangladesh, highlighting their indigenous knowledge. The study was carried out with respect to three income groups. A total of 36 households (12 from each income groups) were assessed using different participatory appraisals through semi-structured questionnaires. A special type of indigenous knowledge on housing pattern and food habit was explored in the Mro community, which correspond to the severe dependence on forest resources.
文摘Demand response(DR) is gaining more and more importance in the architecture of power systems in a context of flexible loads and high share of intermittent generation. Changes in electricity markets regulation in several countries have recently enabled an effective integration of DR mechanisms in power systems. Through its flexible components(pumps, tanks), drinking water systems are suitable candidates for energy-efficient DR mechanisms. However, these systems are often managed independently of power system operation for both economic and operational reasons. Indeed, a sufficient level of economic viability and water demands risk management are necessary for water utilities to integrate their flexibilities to power system operation. In this paper,we proposed a mathematical model for optimizing pump schedules in water systems while trading DR blocs in a spot power market during peak times. Uncertainties about water demands were considered in the mathematical model allowing to propose power reductions covering the potential risk of real-time water demand forecasting inaccuracy.Numerical results were discussed on a real water system in France, demonstrating both economic and ecological benefits.
文摘The present experiment was designed to investigatethe effect of oral mungbean on the tumorogenesisin experimental mice.Hybrid mice weighing 20-22g were randomly distributed into several groups.Morpholine（0.635%）was supplemented with the basicdiet.N<sub>2</sub>NO<sub>2</sub>（0. 02%）was dissolved in drinking wateradjusted to pH7.0.Test diets were prepared by supple-ment of various levels（3%,5%,or 10%）of mungbeanwith the basic diet in addition to morpholine Same
文摘Nasreddin was a poor man, so he tried to grow asmany vegetables as he could in his own garden, so thathe would not have to buy so many in the market. One evening he heard a noise in his garden and lookedout of the window. A white ox had got into the gardenand was eating his vegetables. Nasreddin at once took
文摘1. A man trained his dog to go around the corner toBud’s Lounge every day with two dollar bills under hiscol1ar to get a pack of cigarettes. Once the man only hada five, so he put it under the collar and set the dog onhis way. An hour passed and the dog still hadn’t returned.So the man went to Bud’s and found his dog sitting on
文摘The church bells began to ring.It was a Sunday morningin January.Frau Goldeck was slowly drinking a cup of hot cof-fee in her kitchen.There was a fire in the stove,but it had notbeen lit very long and the room was still cold.Frau Goldeckwas wearing heavy woolen clothes.Every few seconds,shelooked at a clock hanging on the wall.She was waiting for
文摘The story of silk is a fascinating one. About 4,000 years ago the Chinese discovered thesecret of the cocoon. No one knows exactly how or whenthis important discovery was made. One story says that ayoung princess was drinking tea in her garden andwatching the silkworms spin cocoons. By chance one drop-ped into her tea and the hot liquid softened it. When thegirl tried to take the cocoon out of her tea it unraveledand she pulled out a long silk thread.
文摘五十四各种比喻(like) 英语中的明喻成语除了用as来引导喻体以外,还可以用like来引导。有的成语可以用于字面意义,例如,clever like a fox,表示象“狐狸一样聪明”;更多的成语可以用于比喻意义,例如,drinking like a fish,表示“大喝,牛饮”,因为事实上鱼喝的水并不太多。我们可以顺便注意一下,汉语里用的是“牛”而不是“鱼”。有时候,同样的喻体可以表示不同的意义,例如,fight like cats and dogs(大打出手),rain cats and dogs(大雨倾盆)。
文摘turn 用作名词时可以和不少介词构成介词短语,使用时须注意各短语意义上的细微差别。1.at every turn 每次,总是,到处,主要表示事情发生的频率。例如:1)Because of his drinking,the man was refused a job at every turn.由于酗酒,那人每次找工作都遭到拒绝。2)Life holds new adventures at every turn.生活中处处有新的风险。2.by turn 交替地,轮流地,一会儿……一会儿,其含义为:有规律地轮换,根据一个重复性的计划而一个接一个或一个替换另一个。通常位于句末,turn 为复数。例如:
文摘Wine culture is considered as an indispensible part of the culture in different countries. Distinctive differences exist between Chinese wine culture and the wine culture in western countries due to their historical backgrounds, different values, cultures and customs, etc. A general study of the comparison between Chinese wine culture and western wine culture is given in this paper in order to help us have a better understanding of the wine culture and make us be aware of showing mutual respect for each other.
