The yield and stereoselectivity of the Diels-Alder reactions between furan(or 2-methylfuran)and different dienophiles are markedly enhanced by the catalysis of anhydrous YbCl_3.
Jie qi(subseasonal phases or solar qi)constitutes the solar component of the ancient Chinese lunisolar calendar. It divides the year into twenty-four subseasonal phases i.e. li chun(beginning of spring),chun fen(sprin...Jie qi(subseasonal phases or solar qi)constitutes the solar component of the ancient Chinese lunisolar calendar. It divides the year into twenty-four subseasonal phases i.e. li chun(beginning of spring),chun fen(spring equinox),etc.From the premodern perspective of Traditional Chinese Medicine(TCM),normal climate change(qi hou bian qian)moves in harmony with the temporal flow of the qi(qi yun)and is thus beneficial to human health.However,abnormal,abrupt weather or climatic changes like those weather features of being too cold or too hot,too windy,too humid,too dry or a combination of two or more of these weather/climatic features which occur out of season can lead to'seasonal diseases'(shi bing)or 'diseases brought about by external influences'(wai gan zhi bing)or by the'six excessive climatic qi etiological factors'(liu yin zhi bing 六因致病).Some examples of seasonal diseases are SARS,influenza,the common cold and heat stroke. But the temporal flow of the subseasonal qi(qi yun) in Australia is the reverse of that of the northern hemispherical regions of China,United States and Europe.This situation thus leads to a temporal desynchronisation of TCM practice and practitioners with the rhythm of the seasons.In order to address this problem,I have constructed a Chinese Medical & Agricultural Lunisolar Calendar (Northern & Southern Hemispheres),which'reverses'the flow of the subseasonal phases in the southern hemisphere.Having this calendrical tool,Chinese medicine practitioners in Australia can'reverse'their clinical activities in accordance with the natural rhythm of the seasons here.展开更多
1 The Cyclical Flow of the Sixty-Gan zhi Temporal Units 'Time for the Chinese is forever flowing without beginning or end',noted Thome H. Fang. And'it is customary for Chinese to use the kan-Chih(gan zhi)t...1 The Cyclical Flow of the Sixty-Gan zhi Temporal Units 'Time for the Chinese is forever flowing without beginning or end',noted Thome H. Fang. And'it is customary for Chinese to use the kan-Chih(gan zhi)to mark the passage of time.There are ten heavenly stems(gan)and twelve earthly branches(zhi),an alternating and sequential combination of the two makes a cycle of sixty years,months,days and two-hour period shi chen(时辰)in a day'. The sixty gan zhi temporal cycle is very important in the practice of Chinese medicine.It is an important practical temporal tool in the acupuncture practice of 子午流注(zi wu liu zhu)which is a method of choosing and using acupuncture points in dealing with a specific clinical pattern in accordance with the patient's temporal clotting and flowing of his/her Qi and blood.In addition,the sixty gan-zhi temporal cyclical system is also an important tool in forecasting adverse weather/climactic conditions and the illnesses that comes with them on the basis of the ancient methodology of 'the circulating five elements/phases and the six climactic influences'五运六气.Hence,I have included this gan zhi or celestial stems and earthly branches for each of the days in the Chinese Medical and Agricultural Lunisolar Calendar for the year of Rat wu zi nian(wu is the celestial stem while zi is the earthly branch for the year 2008).展开更多
文摘The yield and stereoselectivity of the Diels-Alder reactions between furan(or 2-methylfuran)and different dienophiles are markedly enhanced by the catalysis of anhydrous YbCl_3.
文摘Jie qi(subseasonal phases or solar qi)constitutes the solar component of the ancient Chinese lunisolar calendar. It divides the year into twenty-four subseasonal phases i.e. li chun(beginning of spring),chun fen(spring equinox),etc.From the premodern perspective of Traditional Chinese Medicine(TCM),normal climate change(qi hou bian qian)moves in harmony with the temporal flow of the qi(qi yun)and is thus beneficial to human health.However,abnormal,abrupt weather or climatic changes like those weather features of being too cold or too hot,too windy,too humid,too dry or a combination of two or more of these weather/climatic features which occur out of season can lead to'seasonal diseases'(shi bing)or 'diseases brought about by external influences'(wai gan zhi bing)or by the'six excessive climatic qi etiological factors'(liu yin zhi bing 六因致病).Some examples of seasonal diseases are SARS,influenza,the common cold and heat stroke. But the temporal flow of the subseasonal qi(qi yun) in Australia is the reverse of that of the northern hemispherical regions of China,United States and Europe.This situation thus leads to a temporal desynchronisation of TCM practice and practitioners with the rhythm of the seasons.In order to address this problem,I have constructed a Chinese Medical & Agricultural Lunisolar Calendar (Northern & Southern Hemispheres),which'reverses'the flow of the subseasonal phases in the southern hemisphere.Having this calendrical tool,Chinese medicine practitioners in Australia can'reverse'their clinical activities in accordance with the natural rhythm of the seasons here.
文摘1 The Cyclical Flow of the Sixty-Gan zhi Temporal Units 'Time for the Chinese is forever flowing without beginning or end',noted Thome H. Fang. And'it is customary for Chinese to use the kan-Chih(gan zhi)to mark the passage of time.There are ten heavenly stems(gan)and twelve earthly branches(zhi),an alternating and sequential combination of the two makes a cycle of sixty years,months,days and two-hour period shi chen(时辰)in a day'. The sixty gan zhi temporal cycle is very important in the practice of Chinese medicine.It is an important practical temporal tool in the acupuncture practice of 子午流注(zi wu liu zhu)which is a method of choosing and using acupuncture points in dealing with a specific clinical pattern in accordance with the patient's temporal clotting and flowing of his/her Qi and blood.In addition,the sixty gan-zhi temporal cyclical system is also an important tool in forecasting adverse weather/climactic conditions and the illnesses that comes with them on the basis of the ancient methodology of 'the circulating five elements/phases and the six climactic influences'五运六气.Hence,I have included this gan zhi or celestial stems and earthly branches for each of the days in the Chinese Medical and Agricultural Lunisolar Calendar for the year of Rat wu zi nian(wu is the celestial stem while zi is the earthly branch for the year 2008).
