Austenitic stainless steel(ASS) and High nickel steel(HNS) welding consumables are being used for welding Q&T steels, as they have higher solubility for hydrogen in austenitic phase, to avoid hydrogen induced crac...Austenitic stainless steel(ASS) and High nickel steel(HNS) welding consumables are being used for welding Q&T steels, as they have higher solubility for hydrogen in austenitic phase, to avoid hydrogen induced cracking(HIC) but they are very expensive. In recent years, the developments of low hydrogen ferritic steel(LHF) consumables that contain no hygroscopic compounds are utilized for welding Q&T steels. Heat affected zone(HAZ) softening is another critical issue during welding of armour grade Q&T steels and it depends on the welding process employed and the weld thermal cycle. In this investigation an attempt has been made to study the influence of welding consumables and welding processes on metallurgical characteristics of armour grade Q&T steel joints by various metallurgical characterization procedures. Shielded metal arc welding(SMAW) and flux cored arc welding(FCAW) processes were used for making welds using ASS, LHF and HNS welding consumables. The joints fabricated by using LHF consumables offered lower degree of HAZ softening and there is no evidence of HIC in the joints fabricated using LHF consumables.展开更多
Viral-mediated gene transfer of thymidine kinase ofherpes simplex virus (HSV-tk) has been used to confercytotoxic sensitivity to ganciclovir (GCV) in a variety oftnmor cells. HSV-tk converts GCV into a phosphorylatedc...Viral-mediated gene transfer of thymidine kinase ofherpes simplex virus (HSV-tk) has been used to confercytotoxic sensitivity to ganciclovir (GCV) in a variety oftnmor cells. HSV-tk converts GCV into a phosphorylatedcompound which is toxic for dividing cells by blockingDNA synthesis. Our previous study has shown展开更多
HSV-TK/GCV system and CD/5FC system aretwo effective systems of cancer suicide gene therapy.We have demonstrated that adenovirus-mediated CD/5FC system could suppress the growth of subcutaneoushuman hepatocellular car...HSV-TK/GCV system and CD/5FC system aretwo effective systems of cancer suicide gene therapy.We have demonstrated that adenovirus-mediated CD/5FC system could suppress the growth of subcutaneoushuman hepatocellular carcinoma to some degree. Tofurther investigate whether the suicide gene therapyaffects the immune system or the immune systemaffects the effectiveness of suicide gene therapy, acolon adenocarcinoma of BALB/c mice, CT26,展开更多
Hemophilia B, affecting 1 in 30000 males, is aserious X-linked recessive bleeding disorder due to apartial or complete deficiency of human clottingfactor Ⅸ (hFⅨ) activity in the plasma. Conventionaltherapy depends o...Hemophilia B, affecting 1 in 30000 males, is aserious X-linked recessive bleeding disorder due to apartial or complete deficiency of human clottingfactor Ⅸ (hFⅨ) activity in the plasma. Conventionaltherapy depends on the infusion of human plasma orconcentrate. The therapeutic effect is temporary展开更多
09001 The Calibration of a Reference SoundSource in Semianechoic Room. Yu Bo. Zhong Meie,Cheng Jianlin:1(3). 1980.pp.213--218.This paper describes the calibration method of areference Sound source.A set of calibration...09001 The Calibration of a Reference SoundSource in Semianechoic Room. Yu Bo. Zhong Meie,Cheng Jianlin:1(3). 1980.pp.213--218.This paper describes the calibration method of areference Sound source.A set of calibration data for areference sound source type 4204 of A--power leveland sound power level in third octave band frequenciesin semianechoic room are given.The factors展开更多
Breeding for wilt resistance and its theoretical basis are primarily responsible for increases in cotton yield and fiber quality. Breeding for immunity is the most efficient method in our struggle with infectious dise...Breeding for wilt resistance and its theoretical basis are primarily responsible for increases in cotton yield and fiber quality. Breeding for immunity is the most efficient method in our struggle with infectious diseases.展开更多
Construction of infectious clones by full-length cDNA is basic and key for recovering RNA virus and is core of reverse genetics.In this article,basic consideration and key technology were viewed and factors affecting ...Construction of infectious clones by full-length cDNA is basic and key for recovering RNA virus and is core of reverse genetics.In this article,basic consideration and key technology were viewed and factors affecting infectivity of clones were also summarized.Some research advances were briefly introduced about positive-strand RNA viruses infectious clones.Finally,this article also reviewed the application of infectious clones.展开更多
Based on tropical cyclone track dataset in the western North Pacific from China Meteorological Administration(CMA),variations in frequency and intensity of tropical cyclones(TCs)in the western North Pacific,affecting-...Based on tropical cyclone track dataset in the western North Pacific from China Meteorological Administration(CMA),variations in frequency and intensity of tropical cyclones(TCs)in the western North Pacific,affecting-China TCs(ACTCs)and landfall TCs(LTCs)achieving a typhoon intensity during 1957-2004 were studied.Frequencies of strong tropical cyclones showed significant decreasing trends from 1957 to 2004 and the linear trend was much greater when the intensity was stronger.There was no linear trend in the portion of strong tropical cyclones achieving a typhoon(TY)intensity,while those reaching a strong typhoon(STY)and a super typhoon(SuperTY)intensity showed decreasing trends during 1957-2004.The maximum intensities of TCs,ACTCs and LTCs all decreased during the period of 1957-2004.The mean intensities of TCs and ACTCs displayed decreasing trends and the mean intensity of LTCs achieving a TY intensity also showed a decreasing trend.展开更多
基金Armament Research Board (ARMREB), New Delhi for funding this project work (Project no. MAA/03/ 41)
文摘Austenitic stainless steel(ASS) and High nickel steel(HNS) welding consumables are being used for welding Q&T steels, as they have higher solubility for hydrogen in austenitic phase, to avoid hydrogen induced cracking(HIC) but they are very expensive. In recent years, the developments of low hydrogen ferritic steel(LHF) consumables that contain no hygroscopic compounds are utilized for welding Q&T steels. Heat affected zone(HAZ) softening is another critical issue during welding of armour grade Q&T steels and it depends on the welding process employed and the weld thermal cycle. In this investigation an attempt has been made to study the influence of welding consumables and welding processes on metallurgical characteristics of armour grade Q&T steel joints by various metallurgical characterization procedures. Shielded metal arc welding(SMAW) and flux cored arc welding(FCAW) processes were used for making welds using ASS, LHF and HNS welding consumables. The joints fabricated by using LHF consumables offered lower degree of HAZ softening and there is no evidence of HIC in the joints fabricated using LHF consumables.
文摘Viral-mediated gene transfer of thymidine kinase ofherpes simplex virus (HSV-tk) has been used to confercytotoxic sensitivity to ganciclovir (GCV) in a variety oftnmor cells. HSV-tk converts GCV into a phosphorylatedcompound which is toxic for dividing cells by blockingDNA synthesis. Our previous study has shown
文摘HSV-TK/GCV system and CD/5FC system aretwo effective systems of cancer suicide gene therapy.We have demonstrated that adenovirus-mediated CD/5FC system could suppress the growth of subcutaneoushuman hepatocellular carcinoma to some degree. Tofurther investigate whether the suicide gene therapyaffects the immune system or the immune systemaffects the effectiveness of suicide gene therapy, acolon adenocarcinoma of BALB/c mice, CT26,
文摘Hemophilia B, affecting 1 in 30000 males, is aserious X-linked recessive bleeding disorder due to apartial or complete deficiency of human clottingfactor Ⅸ (hFⅨ) activity in the plasma. Conventionaltherapy depends on the infusion of human plasma orconcentrate. The therapeutic effect is temporary
文摘09001 The Calibration of a Reference SoundSource in Semianechoic Room. Yu Bo. Zhong Meie,Cheng Jianlin:1(3). 1980.pp.213--218.This paper describes the calibration method of areference Sound source.A set of calibration data for areference sound source type 4204 of A--power leveland sound power level in third octave band frequenciesin semianechoic room are given.The factors
文摘Breeding for wilt resistance and its theoretical basis are primarily responsible for increases in cotton yield and fiber quality. Breeding for immunity is the most efficient method in our struggle with infectious diseases.
文摘Construction of infectious clones by full-length cDNA is basic and key for recovering RNA virus and is core of reverse genetics.In this article,basic consideration and key technology were viewed and factors affecting infectivity of clones were also summarized.Some research advances were briefly introduced about positive-strand RNA viruses infectious clones.Finally,this article also reviewed the application of infectious clones.
文摘Based on tropical cyclone track dataset in the western North Pacific from China Meteorological Administration(CMA),variations in frequency and intensity of tropical cyclones(TCs)in the western North Pacific,affecting-China TCs(ACTCs)and landfall TCs(LTCs)achieving a typhoon intensity during 1957-2004 were studied.Frequencies of strong tropical cyclones showed significant decreasing trends from 1957 to 2004 and the linear trend was much greater when the intensity was stronger.There was no linear trend in the portion of strong tropical cyclones achieving a typhoon(TY)intensity,while those reaching a strong typhoon(STY)and a super typhoon(SuperTY)intensity showed decreasing trends during 1957-2004.The maximum intensities of TCs,ACTCs and LTCs all decreased during the period of 1957-2004.The mean intensities of TCs and ACTCs displayed decreasing trends and the mean intensity of LTCs achieving a TY intensity also showed a decreasing trend.
