In order to study and copare the diffe-rence of DNA repair synthesis induced bychemical carcinogens in human respiratoryepithelial cells and fibroblast cells,the nasopharyngeal and
We have previously reported that defi-ciency in mismatch repair (mutS) leads todramatic change in EMS(ethylmethanesulfona-te) induced mutational specificity(JanionC.,Grzesiuk E.,Mut.Env.p.A,pp.145-153。
Recently,the isospin fractionation thereby the neutron to proton(N/Z)ratio of the low density region significantly exceeds that of the high density region in nuclear multifragmentation has been an active subject both ...Recently,the isospin fractionation thereby the neutron to proton(N/Z)ratio of the low density region significantly exceeds that of the high density region in nuclear multifragmentation has been an active subject both theoretically and experimentally^([1,2]).In this work,the static and dynamical interpretations of the isospin fractionation is presented.Fig.1 shows the neutron chemical potential of the high density region and the展开更多
We used 5 types maleimide spin labeling compounds in studying the property of sulfhydryl binding sites on normal cells V79 and cancer cells V79-B1 membrane of the lungs of Chinese hamster. The binding sites of sulfhyd...We used 5 types maleimide spin labeling compounds in studying the property of sulfhydryl binding sites on normal cells V79 and cancer cells V79-B1 membrane of the lungs of Chinese hamster. The binding sites of sulfhydryl group on the membrane proteins of both normal cell V79 and cancer cell V79-B1 are of conical shape. But, the binding sites of sulfhydryl group on the membrane of V79 cell are narrower and deeper than those of V79-B1 cell. The depth of the former is about 10.85—15.33 while the depth of the latter is less than 10.85.展开更多
Rubescensine A (Rub A; oridonin), one of diterpenoids extracted from Rabdosia rubescens (Hemsl.) Hara, was shown to have inhibitory effect on tumour growth in animals. The clinical study has confirmed its effectivenes...Rubescensine A (Rub A; oridonin), one of diterpenoids extracted from Rabdosia rubescens (Hemsl.) Hara, was shown to have inhibitory effect on tumour growth in animals. The clinical study has confirmed its effectiveness in patients with esophagealcancer. We have recently reported that the CaEs-17 human esophageal cancer展开更多
In this paper the author establishes the following1.If M^n(n≥3)is a connected Riemannian manifold,then the sectional curvatureK(p),where p is any plane in T^x(M),is a function of at most n(n-1)/2 variables.Moreprecis...In this paper the author establishes the following1.If M^n(n≥3)is a connected Riemannian manifold,then the sectional curvatureK(p),where p is any plane in T^x(M),is a function of at most n(n-1)/2 variables.Moreprecisely,K(p)depends on at most n(n-1)/2 parameters of group SO(n).2.Lot M^n(n≥3)be a connected Riemannian manifold.If there exists a point x ∈ Msuch that the sectional curvature K(p)is independent of the plane p∈T_x(M),then M is aspace of constant curvature.This latter improves a well-known theorem of F.Schur.展开更多
This paper considers another kind of chemical reaction different from [1].Thedifference is that the chemical reactions under consideration are assumed to be heterogeneous,fast,reversible and classical.As a typical exa...This paper considers another kind of chemical reaction different from [1].Thedifference is that the chemical reactions under consideration are assumed to be heterogeneous,fast,reversible and classical.As a typical example,the author reduces this problem to anone phase Stefan problem with noncommon data,and investigates the classical solution aswell as the weak solution.展开更多
Suppose a linear regression model Yi=Xiβ+ei, i=, .. n is given, and c′β is a linear estimable function for n sufficiently large, its Gauss-Markov estimate （GME） is c′（?）（n）, where （?）（n） is any LSE of β...Suppose a linear regression model Yi=Xiβ+ei, i=, .. n is given, and c′β is a linear estimable function for n sufficiently large, its Gauss-Markov estimate （GME） is c′（?）（n）, where （?）（n） is any LSE of β based on Y1, …, Yn. Any estimate of c′β with a展开更多
In this paper,the author establishes the concepts of relative self-compatibility andrelative finite derivability of languages and obtains the relation between self-compatibilityand relative self-compatibility.From thi...In this paper,the author establishes the concepts of relative self-compatibility andrelative finite derivability of languages and obtains the relation between self-compatibilityand relative self-compatibility.From this it is proved that a family of languages isnondeterministically recognizable if and only if it is relatively self-compatible andrelatively finitely derivable to some set of families of langugaes.展开更多
In a recently published Nature article,Lee et al.investigated distinct metabolic dependencies of pancreatic ductal adenocarcinoma(PDA)cells compared to normal tissue,and discovered that PDA cells exhibited a unique re...In a recently published Nature article,Lee et al.investigated distinct metabolic dependencies of pancreatic ductal adenocarcinoma(PDA)cells compared to normal tissue,and discovered that PDA cells exhibited a unique reliance on de novo ornithine synthesis from glutamine,rather than arginine.This aberrant polyamine synthesis offers a promising therapeutic target for pancreatic cancer.展开更多
Plastic and rubber product sectorThe impact of RMB appreciation onChina’s plastic and rubber productsector will be positive.As the depen-dence on the import of raw materialssuch as synthetic resin,natural rub-ber and...Plastic and rubber product sectorThe impact of RMB appreciation onChina’s plastic and rubber productsector will be positive.As the depen-dence on the import of raw materialssuch as synthetic resin,natural rub-ber and synthetic rubber is still quitehigh,the increase of the展开更多
文摘In order to study and copare the diffe-rence of DNA repair synthesis induced bychemical carcinogens in human respiratoryepithelial cells and fibroblast cells,the nasopharyngeal and
文摘We have previously reported that defi-ciency in mismatch repair (mutS) leads todramatic change in EMS(ethylmethanesulfona-te) induced mutational specificity(JanionC.,Grzesiuk E.,Mut.Env.p.A,pp.145-153。
文摘Recently,the isospin fractionation thereby the neutron to proton(N/Z)ratio of the low density region significantly exceeds that of the high density region in nuclear multifragmentation has been an active subject both theoretically and experimentally^([1,2]).In this work,the static and dynamical interpretations of the isospin fractionation is presented.Fig.1 shows the neutron chemical potential of the high density region and the
文摘We used 5 types maleimide spin labeling compounds in studying the property of sulfhydryl binding sites on normal cells V79 and cancer cells V79-B1 membrane of the lungs of Chinese hamster. The binding sites of sulfhydryl group on the membrane proteins of both normal cell V79 and cancer cell V79-B1 are of conical shape. But, the binding sites of sulfhydryl group on the membrane of V79 cell are narrower and deeper than those of V79-B1 cell. The depth of the former is about 10.85—15.33 while the depth of the latter is less than 10.85.
文摘Rubescensine A (Rub A; oridonin), one of diterpenoids extracted from Rabdosia rubescens (Hemsl.) Hara, was shown to have inhibitory effect on tumour growth in animals. The clinical study has confirmed its effectiveness in patients with esophagealcancer. We have recently reported that the CaEs-17 human esophageal cancer
基金Projects Supported by the Natural Science Funds of china.
文摘In this paper the author establishes the following1.If M^n(n≥3)is a connected Riemannian manifold,then the sectional curvatureK(p),where p is any plane in T^x(M),is a function of at most n(n-1)/2 variables.Moreprecisely,K(p)depends on at most n(n-1)/2 parameters of group SO(n).2.Lot M^n(n≥3)be a connected Riemannian manifold.If there exists a point x ∈ Msuch that the sectional curvature K(p)is independent of the plane p∈T_x(M),then M is aspace of constant curvature.This latter improves a well-known theorem of F.Schur.
文摘This paper considers another kind of chemical reaction different from [1].Thedifference is that the chemical reactions under consideration are assumed to be heterogeneous,fast,reversible and classical.As a typical example,the author reduces this problem to anone phase Stefan problem with noncommon data,and investigates the classical solution aswell as the weak solution.
文摘Suppose a linear regression model Yi=Xiβ+ei, i=, .. n is given, and c′β is a linear estimable function for n sufficiently large, its Gauss-Markov estimate （GME） is c′（?）（n）, where （?）（n） is any LSE of β based on Y1, …, Yn. Any estimate of c′β with a
基金This work was supported in part by Beijing-Hong Kong Academic Exchange Centre.
文摘In this paper,the author establishes the concepts of relative self-compatibility andrelative finite derivability of languages and obtains the relation between self-compatibilityand relative self-compatibility.From this it is proved that a family of languages isnondeterministically recognizable if and only if it is relatively self-compatible andrelatively finitely derivable to some set of families of langugaes.
文摘In a recently published Nature article,Lee et al.investigated distinct metabolic dependencies of pancreatic ductal adenocarcinoma(PDA)cells compared to normal tissue,and discovered that PDA cells exhibited a unique reliance on de novo ornithine synthesis from glutamine,rather than arginine.This aberrant polyamine synthesis offers a promising therapeutic target for pancreatic cancer.
文摘Plastic and rubber product sectorThe impact of RMB appreciation onChina’s plastic and rubber productsector will be positive.As the depen-dence on the import of raw materialssuch as synthetic resin,natural rub-ber and synthetic rubber is still quitehigh,the increase of the
