The mutagenicty and antimutagenicity potentials of three kinds ofdetergents,Aliphatic ethoxylate(AEO);Linear alkylbenzene sul-phonates with 7-carbons chain(LAS1);and LAS with 9-carbons chain(LAS2)were tested with thre...The mutagenicty and antimutagenicity potentials of three kinds ofdetergents,Aliphatic ethoxylate(AEO);Linear alkylbenzene sul-phonates with 7-carbons chain(LAS1);and LAS with 9-carbons chain(LAS2)were tested with three short-term bioassay.展开更多
Both heating and solvent-spray methods are used to consolidate the standard grains of double-base oblate sphere propellants plasticized with triethyleneglycol dinitrate(TEGDN)(TEGDN propellants) to high density propel...Both heating and solvent-spray methods are used to consolidate the standard grains of double-base oblate sphere propellants plasticized with triethyleneglycol dinitrate(TEGDN)(TEGDN propellants) to high density propellants.The obtained consolidated propellants are deterred and coated with the slow burning multi-layer coating.The maximum compaction density of deterred and coated consolidated propellants can reach up to 1.39 g/cnv.Their mechanic,deconsolidation and combustion performances are tested by the materials test machine,interrupted burning set-up and closed vessel,respectively.The static compression strength of consolidated propellants deterred by multi-layer coating increases significantly to 18 MPa,indicating that they can be applied in most circumstances of charge service.And the samples are easy to deconsolidate in the interrupted burning test.Furthermore,the closed bomb burning curves of the samples indicate a two-stage combustion phenomenon under the condition of certain thickness of coated multi-layers.After the outer deterred multi-layer coating of consolidated samples is finished burning,the inner consolidated propellants continue to bum and breakup into aggregates and grains.The high burning progressivity can be carefully obtained by the smart control of deconsolidation process and duration of consolidated propellants.The preliminary results of consolidated propellants show that a rapid deconsolidation process at higher deconsolidation pressure is presented in the dynamic vivacity curves of closed bomb test.Higher density and higher macro progressivity of consolidated propellants can be obtained by the techniques in this paper.展开更多
Ⅰ. INTRODUCTION In various fields of science and technology thermal conductivities of liquids are required to be determined accurately, conveniently and rapidly. For example, in the research on energy economization, ...Ⅰ. INTRODUCTION In various fields of science and technology thermal conductivities of liquids are required to be determined accurately, conveniently and rapidly. For example, in the research on energy economization, thermal conductivities and thermal diffusivities of an emulsified fuel, a new type of liquid-fuel, with different concentrations, are re-展开更多
In energy eonservatisn, release and transduction of ATPase are of vital importance. A microcalorimetric method was used to study the inhibitory effect of halogen compounds, e.g. ICH2COONa, BrCH2COONa, ICH2CONH2, on th...In energy eonservatisn, release and transduction of ATPase are of vital importance. A microcalorimetric method was used to study the inhibitory effect of halogen compounds, e.g. ICH2COONa, BrCH2COONa, ICH2CONH2, on the activity of Mg2+ dependent soluble ATPase （F1） from pig heart mitochondria. It was found that the degree展开更多
It is well known that the distribution of QSOs in the Hubble diagram (plot of apparent magnitude versus the redshift) is quite disordered. Several works on search for the 'standard candle', therefore, have app...It is well known that the distribution of QSOs in the Hubble diagram (plot of apparent magnitude versus the redshift) is quite disordered. Several works on search for the 'standard candle', therefore, have appeared and claimed that the deceleration parameter q0 has been determined.展开更多
Ⅰ. INTRODUCTION Emissivity is an important parameter in the field of infrared remote sensing. It is an urgent need to accurately measure the emissivity of various objects in the application of infrared radiometer or ...Ⅰ. INTRODUCTION Emissivity is an important parameter in the field of infrared remote sensing. It is an urgent need to accurately measure the emissivity of various objects in the application of infrared radiometer or scanning radiometer to obtaining the true surface temperature at a specific area.展开更多
DNA is the basic compound for biological genetic characteristics. After DNA is damaged, DNA-repair synthesis would occur. This function is closely related with the alteration of cancer-cell, heritable disease, etc. Me...DNA is the basic compound for biological genetic characteristics. After DNA is damaged, DNA-repair synthesis would occur. This function is closely related with the alteration of cancer-cell, heritable disease, etc. Measurement of DNA-repair synthesis function is an important method in the study of the above diseases of molecular level and in the risk assessment for chemical mutagens. Since the alteration of DNA appears to be a key step展开更多
文摘The mutagenicty and antimutagenicity potentials of three kinds ofdetergents,Aliphatic ethoxylate(AEO);Linear alkylbenzene sul-phonates with 7-carbons chain(LAS1);and LAS with 9-carbons chain(LAS2)were tested with three short-term bioassay.
基金supported in part by the National Natural Science Foundation of China(No.51376092)
文摘Both heating and solvent-spray methods are used to consolidate the standard grains of double-base oblate sphere propellants plasticized with triethyleneglycol dinitrate(TEGDN)(TEGDN propellants) to high density propellants.The obtained consolidated propellants are deterred and coated with the slow burning multi-layer coating.The maximum compaction density of deterred and coated consolidated propellants can reach up to 1.39 g/cnv.Their mechanic,deconsolidation and combustion performances are tested by the materials test machine,interrupted burning set-up and closed vessel,respectively.The static compression strength of consolidated propellants deterred by multi-layer coating increases significantly to 18 MPa,indicating that they can be applied in most circumstances of charge service.And the samples are easy to deconsolidate in the interrupted burning test.Furthermore,the closed bomb burning curves of the samples indicate a two-stage combustion phenomenon under the condition of certain thickness of coated multi-layers.After the outer deterred multi-layer coating of consolidated samples is finished burning,the inner consolidated propellants continue to bum and breakup into aggregates and grains.The high burning progressivity can be carefully obtained by the smart control of deconsolidation process and duration of consolidated propellants.The preliminary results of consolidated propellants show that a rapid deconsolidation process at higher deconsolidation pressure is presented in the dynamic vivacity curves of closed bomb test.Higher density and higher macro progressivity of consolidated propellants can be obtained by the techniques in this paper.
基金The project supported by the Key Project of the Ministry of Education under Grant No.106033the Specialized Research Fund for the Doctoral Program of Higher Education under Grant No.20060006024+2 种基金National Natural Science Foundation of China under Grant Nos.60372095 and 60772023the Open Fund of the State Key Laboratory of Software Development Environment under Grant No.SKLSDE07-001Beijing University of Aeronautics and Astronautics,and the National Basic Research Program of China(973 Program)under Grant No.2005CB321901
文摘Ⅰ. INTRODUCTION In various fields of science and technology thermal conductivities of liquids are required to be determined accurately, conveniently and rapidly. For example, in the research on energy economization, thermal conductivities and thermal diffusivities of an emulsified fuel, a new type of liquid-fuel, with different concentrations, are re-
文摘In energy eonservatisn, release and transduction of ATPase are of vital importance. A microcalorimetric method was used to study the inhibitory effect of halogen compounds, e.g. ICH2COONa, BrCH2COONa, ICH2CONH2, on the activity of Mg2+ dependent soluble ATPase （F1） from pig heart mitochondria. It was found that the degree
文摘It is well known that the distribution of QSOs in the Hubble diagram (plot of apparent magnitude versus the redshift) is quite disordered. Several works on search for the 'standard candle', therefore, have appeared and claimed that the deceleration parameter q0 has been determined.
文摘Ⅰ. INTRODUCTION Emissivity is an important parameter in the field of infrared remote sensing. It is an urgent need to accurately measure the emissivity of various objects in the application of infrared radiometer or scanning radiometer to obtaining the true surface temperature at a specific area.
文摘DNA is the basic compound for biological genetic characteristics. After DNA is damaged, DNA-repair synthesis would occur. This function is closely related with the alteration of cancer-cell, heritable disease, etc. Measurement of DNA-repair synthesis function is an important method in the study of the above diseases of molecular level and in the risk assessment for chemical mutagens. Since the alteration of DNA appears to be a key step
