Objective With the development of analytic technologies, in-situ dating on U-bearing oxide minerals （e.g., cassiterite, rutile and baddeleyite） has been widely used in geological chronological researches and has at...Objective With the development of analytic technologies, in-situ dating on U-bearing oxide minerals （e.g., cassiterite, rutile and baddeleyite） has been widely used in geological chronological researches and has attracted remarkable attention to explore evolution of the earth and obtain age information of various geological processes. Matrix effect related studies are especially important during in-situ U- Pb dating based on Laser Ablation Multiple Collector Inductively Coupled Plasma Mass Spectrometry （LA-MC- ICPMS）. However, to our knowledge, only few thorough and systematical matrix effect study of U-bearing oxide minerals has been reported. In this study, we systematically analyzed the matrix effect of U-bearing oxide minerals in order to take place the standards which are difficult to prepare with available standards.展开更多
This paper reconstructs,based on American and Chinese primary sources,the visits of Chinese mathematicians Shiing-shen Chern陈省身(Chen Xingshen)and Hua Luogeng华罗庚(Loo-Keng Hua)4 to the Institute for Advanced Study...This paper reconstructs,based on American and Chinese primary sources,the visits of Chinese mathematicians Shiing-shen Chern陈省身(Chen Xingshen)and Hua Luogeng华罗庚(Loo-Keng Hua)4 to the Institute for Advanced Study in Princeton in the United States in the 1940s,especially their interactions with Oswald Veblen and Hermann Weyl,two leading mathematicians at the IAS.It argues that Chern’s and Hua’s motivations and choices in regard to their transnational movements between China and the US were more nuanced and multifaceted than what is presented in existing accounts,and that socio-political factors combined with professional-personal ones to shape their decisions.The paper further uses their experiences to demonstrate the importance of transnational scientific interactions for the development of science in China,the US,and elsewhere in the twentieth century.展开更多
Twenty four cases of advanced gastric cancer were divided into two groups according to the general condition of the patients (PS 0-2 and 3-4), further subdivided into localized abdominal form, liver metastatic form, a...Twenty four cases of advanced gastric cancer were divided into two groups according to the general condition of the patients (PS 0-2 and 3-4), further subdivided into localized abdominal form, liver metastatic form, ascitic form and distant metastatic form. These patients were allocated randomly into Regimen A or B. Regimen A: Tegafur 600 mg daily and Mitomycin C (MMC) 5 mg/m2/1-2 weeks. Regimen B: Tegafur 600 mg daily and ACNU (Nimustine, water-soluble Nitrosourea) 60 mg/week for 2 weeks. After a course of ACNU, it was with drawn for 4 weeks and then resumed again. The response rate of Regimen A was 3/11 (27%), that of Regimen B was 3/13 (23%).展开更多
This paper introduces the importance of synthesis and study of new nuclides far from the stability line. Following the example of new nuclides 208Hg, 185Hf and 237Th, which were synthesized for the first time by the s...This paper introduces the importance of synthesis and study of new nuclides far from the stability line. Following the example of new nuclides 208Hg, 185Hf and 237Th, which were synthesized for the first time by the scientists in the Institute of Modern Physics, the progress of physics and technology in this aspect in our country are summarized. This paper also outlines a proposal about farther development of the synthesis and study of new nuclides and the construction of relevant key facilities in our country at the beginning of the next century.展开更多
The careers of three Chinese physicists,Hu Ning,Ma Shijun,and Peng Huanwu at the Dublin Institute for Advance Studies in the 1940s,and later,are described.A brief history of the foundation and operations of the instit...The careers of three Chinese physicists,Hu Ning,Ma Shijun,and Peng Huanwu at the Dublin Institute for Advance Studies in the 1940s,and later,are described.A brief history of the foundation and operations of the institute,as well as the roles in it of Erwin Schrodinger,Walter Heitler,Max Born,and others are included.Some details are given of the works carried out there.The three men's post-institute careers are described,Ma eventually in Australia,and Hu and Peng in the People's Republic of China where they became distinguished leaders of theoretical physics research.展开更多
The significance of apoptosis in gastric cancer is now widely recognized, and the induction of apoptosis as a new approach to treat gastric cancer has aroused great interest. In recent years, studies on certain TCM dr...The significance of apoptosis in gastric cancer is now widely recognized, and the induction of apoptosis as a new approach to treat gastric cancer has aroused great interest. In recent years, studies on certain TCM drugs for treating gastric cancer and for inducing apoptosis have brought about great attention both at home and abroad. The following is a summary made in this aspect.展开更多
A review on the progress in the research of nonlinear atmospheric waves, especially the nonlinear Rossby waves is made in this paper. Many results reported here have been obtained in Peking University.
Rapid economic development over the past two decades in Asian countries such as China and India has raised awareness of pollution control measures necessary to protect public health and welfare. The 7th Asian Aerosol ...Rapid economic development over the past two decades in Asian countries such as China and India has raised awareness of pollution control measures necessary to protect public health and welfare. The 7th Asian Aerosol Conference （AAC） of the Asian Aerosol Research Assembly （AARA）, was held in Xi＇an, China, during August 17-20, 2011. The 7th AAC engaged 550 participants from the sciences, industry, and regulatory communities from 21 countries. The conference included -350 plenary, platform, and poster presentations. In this special issue of PARTICUOLOGY, 15 peer-reviewed scientific articles have been selected to publish from the conference abstracts to represent recent advances for aerosol and environment study in Asia.展开更多
Hunan Province is one of the high incidence areas of nasopharyngeal carcinoma (NPC) in China and ranks the fourth after Guangdong, Guangxi and Fujian. Consequently, the pathogenesis of NPC has been the focus of our st...Hunan Province is one of the high incidence areas of nasopharyngeal carcinoma (NPC) in China and ranks the fourth after Guangdong, Guangxi and Fujian. Consequently, the pathogenesis of NPC has been the focus of our study for many years. Induction of experimental NPC by chemical carcinogens began from 1972. Later, NPC in rats was successfully induced by nitroso compounds, especially N, N’-dinitroso-piperazine (DNPZ) which possesses relative organospecificity and is able to induce squamous cell carcinoma of nasopharynx in rats even by subcutaneous injection. NPC induced in rats is slightly different from the NPC of human due to species difference: it often developed as well-dif-展开更多
EXCITING reports on paleontological discoveries from western Liaoning Province, northeastern China have frequently been released in the past few years. From Confuciusornis to Sinosauropteryx, from Protarchaeopteryx to...EXCITING reports on paleontological discoveries from western Liaoning Province, northeastern China have frequently been released in the past few years. From Confuciusornis to Sinosauropteryx, from Protarchaeopteryx to the primitive mammal, Zhangheotherium, and most recently, to the possibly earliest known flower, Archaefructus liaoningensis, these founds have astounded the world, and this miracle land has drawn increasing interests of scholars all over the world. Two world-famed展开更多
基金financially supported by the National Natural Science Foundation of China(grants No.41503052 and 41373053)the National Science and Technology Infrastructure(grant No.DDK14-39)
文摘Objective With the development of analytic technologies, in-situ dating on U-bearing oxide minerals （e.g., cassiterite, rutile and baddeleyite） has been widely used in geological chronological researches and has attracted remarkable attention to explore evolution of the earth and obtain age information of various geological processes. Matrix effect related studies are especially important during in-situ U- Pb dating based on Laser Ablation Multiple Collector Inductively Coupled Plasma Mass Spectrometry （LA-MC- ICPMS）. However, to our knowledge, only few thorough and systematical matrix effect study of U-bearing oxide minerals has been reported. In this study, we systematically analyzed the matrix effect of U-bearing oxide minerals in order to take place the standards which are difficult to prepare with available standards.
文摘This paper reconstructs,based on American and Chinese primary sources,the visits of Chinese mathematicians Shiing-shen Chern陈省身(Chen Xingshen)and Hua Luogeng华罗庚(Loo-Keng Hua)4 to the Institute for Advanced Study in Princeton in the United States in the 1940s,especially their interactions with Oswald Veblen and Hermann Weyl,two leading mathematicians at the IAS.It argues that Chern’s and Hua’s motivations and choices in regard to their transnational movements between China and the US were more nuanced and multifaceted than what is presented in existing accounts,and that socio-political factors combined with professional-personal ones to shape their decisions.The paper further uses their experiences to demonstrate the importance of transnational scientific interactions for the development of science in China,the US,and elsewhere in the twentieth century.
文摘Twenty four cases of advanced gastric cancer were divided into two groups according to the general condition of the patients (PS 0-2 and 3-4), further subdivided into localized abdominal form, liver metastatic form, ascitic form and distant metastatic form. These patients were allocated randomly into Regimen A or B. Regimen A: Tegafur 600 mg daily and Mitomycin C (MMC) 5 mg/m2/1-2 weeks. Regimen B: Tegafur 600 mg daily and ACNU (Nimustine, water-soluble Nitrosourea) 60 mg/week for 2 weeks. After a course of ACNU, it was with drawn for 4 weeks and then resumed again. The response rate of Regimen A was 3/11 (27%), that of Regimen B was 3/13 (23%).
文摘This paper introduces the importance of synthesis and study of new nuclides far from the stability line. Following the example of new nuclides 208Hg, 185Hf and 237Th, which were synthesized for the first time by the scientists in the Institute of Modern Physics, the progress of physics and technology in this aspect in our country are summarized. This paper also outlines a proposal about farther development of the synthesis and study of new nuclides and the construction of relevant key facilities in our country at the beginning of the next century.
文摘The careers of three Chinese physicists,Hu Ning,Ma Shijun,and Peng Huanwu at the Dublin Institute for Advance Studies in the 1940s,and later,are described.A brief history of the foundation and operations of the institute,as well as the roles in it of Erwin Schrodinger,Walter Heitler,Max Born,and others are included.Some details are given of the works carried out there.The three men's post-institute careers are described,Ma eventually in Australia,and Hu and Peng in the People's Republic of China where they became distinguished leaders of theoretical physics research.
文摘The significance of apoptosis in gastric cancer is now widely recognized, and the induction of apoptosis as a new approach to treat gastric cancer has aroused great interest. In recent years, studies on certain TCM drugs for treating gastric cancer and for inducing apoptosis have brought about great attention both at home and abroad. The following is a summary made in this aspect.
文摘A review on the progress in the research of nonlinear atmospheric waves, especially the nonlinear Rossby waves is made in this paper. Many results reported here have been obtained in Peking University.
文摘Rapid economic development over the past two decades in Asian countries such as China and India has raised awareness of pollution control measures necessary to protect public health and welfare. The 7th Asian Aerosol Conference （AAC） of the Asian Aerosol Research Assembly （AARA）, was held in Xi＇an, China, during August 17-20, 2011. The 7th AAC engaged 550 participants from the sciences, industry, and regulatory communities from 21 countries. The conference included -350 plenary, platform, and poster presentations. In this special issue of PARTICUOLOGY, 15 peer-reviewed scientific articles have been selected to publish from the conference abstracts to represent recent advances for aerosol and environment study in Asia.
文摘Hunan Province is one of the high incidence areas of nasopharyngeal carcinoma (NPC) in China and ranks the fourth after Guangdong, Guangxi and Fujian. Consequently, the pathogenesis of NPC has been the focus of our study for many years. Induction of experimental NPC by chemical carcinogens began from 1972. Later, NPC in rats was successfully induced by nitroso compounds, especially N, N’-dinitroso-piperazine (DNPZ) which possesses relative organospecificity and is able to induce squamous cell carcinoma of nasopharynx in rats even by subcutaneous injection. NPC induced in rats is slightly different from the NPC of human due to species difference: it often developed as well-dif-
文摘EXCITING reports on paleontological discoveries from western Liaoning Province, northeastern China have frequently been released in the past few years. From Confuciusornis to Sinosauropteryx, from Protarchaeopteryx to the primitive mammal, Zhangheotherium, and most recently, to the possibly earliest known flower, Archaefructus liaoningensis, these founds have astounded the world, and this miracle land has drawn increasing interests of scholars all over the world. Two world-famed
