Five groups of rats (40 rats per group) were given five different varieties of Chinese tea (1 g/50 ml) and another two groups of rats (a positive control and a negative control) were given tap water as drinking water....Five groups of rats (40 rats per group) were given five different varieties of Chinese tea (1 g/50 ml) and another two groups of rats (a positive control and a negative control) were given tap water as drinking water. Except for the negative control group, all the animals were intubated with A'-nitrosomethyibenzylamine (NMBzA, 5 mg/kg body wt/week). Half of the animals in each group were sacrificed after 6 weeks and the remaining animals at the end of 12 weeks. The incidences of esophageal mucosa lesions (16-59%) at the end of6 weeks were significantly lower in the tea-treated rats than in the positive control group (100%). The incidences of esophageal tumor at the end of 12 weeks (42-67%) were also significantly lower in the tea-treated groups than in the positive control group (90%). The same phenomenon was found with respect to the size and number of tumors in each tumor-bearing animal. The relative anticarcinogenic effects of the five varieties of Chinese tea were different. The Fujian oolong tea and jasmine tea exhibited the strongest effects. The results suggest that Chinese tea can effectively inhibit the carcinogenesis Caused by an N-nitroso compound. 1990 Academic Press.Inc.展开更多
In cases of measurement,like the beverage discrimination or waste water monitoring,since sensors with direct measuring for specific variables cannot be practically applied,the interest in soft sensor technology,which ...In cases of measurement,like the beverage discrimination or waste water monitoring,since sensors with direct measuring for specific variables cannot be practically applied,the interest in soft sensor technology,which is based on the acquisition and analysis for a lot of information variables,has rapidly increased.This article presents a novel soft sensor which activates a voltage signal between two specially-designed electrodes,inside the Chinese tea solution,and measures the produced current.The proposed sensor discriminated four different kinds of tea,and the dissolution processes of two of them are described as curves on a bidimensional plane.The results indicate that the proposed approach can also be adapted in characterization or discrimination for other solutions.展开更多
China National Native Produce & Animal By-products Guangxi Tea Imp. & Exp. Co. is a subsidiary company of China National Native Produce & Animal By-products Import & Export Corporation. The company has...China National Native Produce & Animal By-products Guangxi Tea Imp. & Exp. Co. is a subsidiary company of China National Native Produce & Animal By-products Import & Export Corporation. The company has a history of more than 40 years in doing foreign trade business and has established stable and favorable relationship with about 100 companies from more than 30 countries and regions. The main business scope of the company includes: all kinds of tea, native produce products, forest chemical products, esse...展开更多
China has traditional tea and ceramics cultures. They supplement each other. In a certain historical period, tea promoted the development of ceramic. The purple earthenware is a kind of ceramic. The development of thi...China has traditional tea and ceramics cultures. They supplement each other. In a certain historical period, tea promoted the development of ceramic. The purple earthenware is a kind of ceramic. The development of this kind of teapot was closely related with Chinese tea. In ancient China, the tea was boiled instead of being infused, as at present. At that time, most of the tea was in compressed form, not in bulk form, so no particular tea utensil was necessary. Since the Ming dynasty (1368-1644), the展开更多
FOR a long time the mostrenowned teahouse in Beijing was theLaoshe Teahouse, which still keeps thetraditional characteristics of theteahouses of old Beijing; bustlingplaces where people sample tea madein special teacu...FOR a long time the mostrenowned teahouse in Beijing was theLaoshe Teahouse, which still keeps thetraditional characteristics of theteahouses of old Beijing; bustlingplaces where people sample tea madein special teacups with lids andsaucers, enjoying Peking opera orstorytelling. Many famous foreignershave joined the great tradition and satdown to enjoy a taste of old Beijing ina teahouse whilst on their visits to thecity.展开更多
TEA is a necessity in Chinese life. According to historical records the Chinese had already learned how to plant and bake tea more than 2,000 years ago. Sipping tea has always been a favorite Chinese tradition. To the...TEA is a necessity in Chinese life. According to historical records the Chinese had already learned how to plant and bake tea more than 2,000 years ago. Sipping tea has always been a favorite Chinese tradition. To the south of the Changjiang River is a region with good irrigation and a climate favorable for growing tea: it is cool at night and often misty. Zhejiang Province is a well-known tea production area, and the famous Longjing Tea is solely produced along the West Lake in Hangzhou, capital of the province. Tea is produced in four areas of China:展开更多
文摘Five groups of rats (40 rats per group) were given five different varieties of Chinese tea (1 g/50 ml) and another two groups of rats (a positive control and a negative control) were given tap water as drinking water. Except for the negative control group, all the animals were intubated with A'-nitrosomethyibenzylamine (NMBzA, 5 mg/kg body wt/week). Half of the animals in each group were sacrificed after 6 weeks and the remaining animals at the end of 12 weeks. The incidences of esophageal mucosa lesions (16-59%) at the end of6 weeks were significantly lower in the tea-treated rats than in the positive control group (100%). The incidences of esophageal tumor at the end of 12 weeks (42-67%) were also significantly lower in the tea-treated groups than in the positive control group (90%). The same phenomenon was found with respect to the size and number of tumors in each tumor-bearing animal. The relative anticarcinogenic effects of the five varieties of Chinese tea were different. The Fujian oolong tea and jasmine tea exhibited the strongest effects. The results suggest that Chinese tea can effectively inhibit the carcinogenesis Caused by an N-nitroso compound. 1990 Academic Press.Inc.
文摘In cases of measurement,like the beverage discrimination or waste water monitoring,since sensors with direct measuring for specific variables cannot be practically applied,the interest in soft sensor technology,which is based on the acquisition and analysis for a lot of information variables,has rapidly increased.This article presents a novel soft sensor which activates a voltage signal between two specially-designed electrodes,inside the Chinese tea solution,and measures the produced current.The proposed sensor discriminated four different kinds of tea,and the dissolution processes of two of them are described as curves on a bidimensional plane.The results indicate that the proposed approach can also be adapted in characterization or discrimination for other solutions.
文摘China National Native Produce & Animal By-products Guangxi Tea Imp. & Exp. Co. is a subsidiary company of China National Native Produce & Animal By-products Import & Export Corporation. The company has a history of more than 40 years in doing foreign trade business and has established stable and favorable relationship with about 100 companies from more than 30 countries and regions. The main business scope of the company includes: all kinds of tea, native produce products, forest chemical products, esse...
文摘China has traditional tea and ceramics cultures. They supplement each other. In a certain historical period, tea promoted the development of ceramic. The purple earthenware is a kind of ceramic. The development of this kind of teapot was closely related with Chinese tea. In ancient China, the tea was boiled instead of being infused, as at present. At that time, most of the tea was in compressed form, not in bulk form, so no particular tea utensil was necessary. Since the Ming dynasty (1368-1644), the
文摘FOR a long time the mostrenowned teahouse in Beijing was theLaoshe Teahouse, which still keeps thetraditional characteristics of theteahouses of old Beijing; bustlingplaces where people sample tea madein special teacups with lids andsaucers, enjoying Peking opera orstorytelling. Many famous foreignershave joined the great tradition and satdown to enjoy a taste of old Beijing ina teahouse whilst on their visits to thecity.
文摘TEA is a necessity in Chinese life. According to historical records the Chinese had already learned how to plant and bake tea more than 2,000 years ago. Sipping tea has always been a favorite Chinese tradition. To the south of the Changjiang River is a region with good irrigation and a climate favorable for growing tea: it is cool at night and often misty. Zhejiang Province is a well-known tea production area, and the famous Longjing Tea is solely produced along the West Lake in Hangzhou, capital of the province. Tea is produced in four areas of China:
