用不同浓度的α-NAA、GA3、ABA喷施处理100 mmol/L Na Cl胁迫下的烟草幼苗,测定烟草幼苗丙二醛含量和超氧化物歧化酶、过氧化物酶、多酚氧化酶活性等指标,探究外源激素对盐胁迫下烟草幼苗生理特性的影响。结果表明:100 mmol/L Na Cl胁迫...用不同浓度的α-NAA、GA3、ABA喷施处理100 mmol/L Na Cl胁迫下的烟草幼苗,测定烟草幼苗丙二醛含量和超氧化物歧化酶、过氧化物酶、多酚氧化酶活性等指标,探究外源激素对盐胁迫下烟草幼苗生理特性的影响。结果表明:100 mmol/L Na Cl胁迫下,烟草幼苗MDA含量和SOD、POD、PPO活性升高;喷施外源激素α-NAA、GA3、ABA可以降低Na Cl胁迫下烟草幼苗MDA含量和SOD、POD、PPO活性,减轻Na Cl对烟苗叶片膜脂过氧化的程度,增强烟苗对盐胁迫的抗性。因此,外源激素α-NAA、GA3、ABA可缓解Na Cl对烟草幼苗胁迫,其中喷施ABA及50 mg/Lα-NAA、GA3缓解效果较好。展开更多
Fluorescence in-situ hybridization （FISH） and 16S rRNA gene clone library analyses were used to determine the abundance and diversity of archaea in Prydz Bay, Antarctica. Correlation analysis was also performed to a...Fluorescence in-situ hybridization （FISH） and 16S rRNA gene clone library analyses were used to determine the abundance and diversity of archaea in Prydz Bay, Antarctica. Correlation analysis was also performed to assess links between physicochemical parameters and archaeal abundance and diversity within the sea-ice. Samples of sea-ice and seawater were collected during the 26th Chinese National Antarctic Research Expedition. The results of FISH showed that archaea were relatively abundant within the top layer of the sea-ice, and correlation analysis suggested that the concentration of 4NH＋ might be one of the main factors underlying this distribution pattern. However, using 16S rRNA gene libraries, archaea were not detected in the top and middle layers of the sea-ice. All archaeal clones obtained from the bottom layer of the sea-ice were grouped into the Marine Group I Crenarchaeota while the archaeal clones from seawater were assigned to Marine Group I Crenarchaeota, Marine Group II Euryarchaeota, and Marine Group III Euryarchaeota. Overall, the ifndings of this study showed that the diversity of archaea in the sea-ice in Prydz Bay was low.展开更多
Molecular targeted therapy (MTT), using chemicals of low molecular weight, monoclonal antibodies, and/or polypep- tides to interfere with specific signaling pathways in cancer cells, causes inhibition of tumor progres...Molecular targeted therapy (MTT), using chemicals of low molecular weight, monoclonal antibodies, and/or polypep- tides to interfere with specific signaling pathways in cancer cells, causes inhibition of tumor progression. Clinical evi- dence has demonstrated that MTT has promising potential in not only killing tumors but also inducing tumor cells to differentiate into normal cells, leading to cure of the patients. Furthermore, MTT leads to potent inhibition of oncogenic signals. The delay of tumor progression makes the patients "survive with tumor". Thus, in the future it is possible that cancer becomes a chronic disease much like diabetes and hypertension. This article reviews the theory on molecular targeted therapy, its features and future direction, and con- tributions in the field from Chinese scientists.展开更多
The Chinese Academy of Sciences held its 7th forum on frontiers of Science and Technology,April 12-13,2012,in the academy hall of the Chinese Academy of Sciences.The Forum was organized by the Life Science and Medicin...The Chinese Academy of Sciences held its 7th forum on frontiers of Science and Technology,April 12-13,2012,in the academy hall of the Chinese Academy of Sciences.The Forum was organized by the Life Science and Medicine Division and co-organized by Academy of Military Medical Sciences and Science China Press.The theme of the 7th Forum was "Lifeomics and Translational Medicine",and the purpose was to discuss the significance of lifeomics(i.e.,展开更多
基金supported by the Natural Science Foundation of China(Grant nos.40876097,41076131 and 41376191)the Chinese Polar Environment Comprehensive Investigation & Assessment Programs(Grant no.CHINARE 2014-02-01)the State High-Tech Research and Development Project(863) of the Ministry of Science and Technology of China(Grant no.2012AA021706)
文摘Fluorescence in-situ hybridization （FISH） and 16S rRNA gene clone library analyses were used to determine the abundance and diversity of archaea in Prydz Bay, Antarctica. Correlation analysis was also performed to assess links between physicochemical parameters and archaeal abundance and diversity within the sea-ice. Samples of sea-ice and seawater were collected during the 26th Chinese National Antarctic Research Expedition. The results of FISH showed that archaea were relatively abundant within the top layer of the sea-ice, and correlation analysis suggested that the concentration of 4NH＋ might be one of the main factors underlying this distribution pattern. However, using 16S rRNA gene libraries, archaea were not detected in the top and middle layers of the sea-ice. All archaeal clones obtained from the bottom layer of the sea-ice were grouped into the Marine Group I Crenarchaeota while the archaeal clones from seawater were assigned to Marine Group I Crenarchaeota, Marine Group II Euryarchaeota, and Marine Group III Euryarchaeota. Overall, the ifndings of this study showed that the diversity of archaea in the sea-ice in Prydz Bay was low.
文摘Molecular targeted therapy (MTT), using chemicals of low molecular weight, monoclonal antibodies, and/or polypep- tides to interfere with specific signaling pathways in cancer cells, causes inhibition of tumor progression. Clinical evi- dence has demonstrated that MTT has promising potential in not only killing tumors but also inducing tumor cells to differentiate into normal cells, leading to cure of the patients. Furthermore, MTT leads to potent inhibition of oncogenic signals. The delay of tumor progression makes the patients "survive with tumor". Thus, in the future it is possible that cancer becomes a chronic disease much like diabetes and hypertension. This article reviews the theory on molecular targeted therapy, its features and future direction, and con- tributions in the field from Chinese scientists.
文摘The Chinese Academy of Sciences held its 7th forum on frontiers of Science and Technology,April 12-13,2012,in the academy hall of the Chinese Academy of Sciences.The Forum was organized by the Life Science and Medicine Division and co-organized by Academy of Military Medical Sciences and Science China Press.The theme of the 7th Forum was "Lifeomics and Translational Medicine",and the purpose was to discuss the significance of lifeomics(i.e.,
