Understanding and measuring AIDS-related settings: A developing country perspective (2007)
Mahendra, V S, Gilborn, L, Bharat, S, Mudoi, R, Gupta, I, George, B, ...
AIDS-related stigma and discrimination remain pervasive problems in health care institutions worldwide. This paper reports on stigma-related baseline findings from a study in New Delhi, India to...
Gravity Driven Motion Of A Single Sphere On A Rough Inclined Surface (1997)
D. Bideau, L. Samson, G. G. Batrouni, A. Aguirre, A. Calvo, C. Henrique
this paper is to present a general overview of the results, with special attention to our recent results from noise measurements, which help characterize the motion at the microscopic scale, and also...
Motion of a Ball on a Rough Inclined Plane (1997)
Introduction To understand the basics of segregation by flow, several experiments have been done on the motion of balls down a rough inclined plane. These experiments have yielded several surprising...
Diffusive Motion of Single Particles on an Inclined Bumpy Plane (1997)
: We study, experimentally and numerically, the properties of the motion of single particles on an inclined bumpy plane. We are mostly interested here in the range of angles of inclination, `, where...
Diffusive motion of single particles on an inclined bumpy plane L. Samson, I. Ippolito (1997)
: We study, experimentally and numerically, the properties of the motion of single particles on an inclined bumpy plane. We are mostly interested here in the range of angles of inclination, `, where...
Gravity Driven Motion Of A Single Sphere On A Rough Inclined Surface (1997)
D. Bideau, L. Samson, G. G. Batrouni, A. Aguirre, A. Calvo, C. Henrique
this paper is to present a general overview of the results, with special attention to our recent results from noise measurements, which help characterize the motion at the microscopic scale, and also...
Diffusive motion of single particles on an inclined bumpy plane L. Samson, I. Ippolito (1997)
We study, experimentally and numerically, the properties of the motion of single particles on an inclined bumpy plane. We are mostly interested here in the range of angles of inclination, `, where...
Gravity Driven Motion Of A Single Sphere On A Rough Inclined Surface (1997)
D. Bideau, L. Samson, G. G. Batrouni, A. Aguirre, A. Calvo, C. Henrique
this paper is to present a general overview of the results, with special attention to our recent results from noise measurements, which help characterize the motion at the microscopic scale, and also...
Experiments on the motion of a particle on an inclined rough plane have yielded some surprising results. For example, it was found that the frictional force acting on the ball is viscous, i.e....
Motion of a Ball on a Rough Inclined Plane (1997)
Introduction To understand the basics of segregation by flow, several experiments have been done on the motion of balls down a rough inclined plane. These experiments have yielded several surprising...
Batrouni, G. G., Dippel, S., Samson, L.
Experiments on the motion of a particle on an inclined rough plane have yielded some surprising results. For example, it was found that the frictional force acting on the ball is viscous, {\it i.e.}...
Maze, R, Carney, J P, Kelley, M R, Glassner, B J, Williams, D A, Samson, L
The chloroethylnitrosourea (CNU) alkylating agents are commonly used for cancer chemotherapy, but their usefulness is limited by severe bone marrow toxicity that causes the cumulative depletion of...
Replication protein A binds to regulatory elements in yeast DNA repair and DNA metabolism genes.
Saccharomyces cerevisiae responds to DNA damage by arresting cell cycle progression (thereby preventing the replication and segregation of damaged chromosomes) and by inducing the expression of...
Three genes that participate in the repair of DNA alkylation damage were recently cloned from Saccharomyces cerevisiae: the MGT1 O6-methylguanine DNA methyltransferase gene, the MAG 3-methyladenine...
Matijasevic, Z, Boosalis, M, Mackay, W, Samson, L, Ludlum, D B
A eukaryotic 3-methyladenine DNA glycosylase gene, the Saccharomyces cerevisiae MAG gene, was shown to prevent N-(2-chloroethyl)-N-nitrosourea toxicity. Disruption of the MAG gene by insertion of the...
Samson, L, Derfler, B, Boosalis, M, Call, K
We described previously the isolation of a Saccharomyces cerevisiae 3-methyladenine (3-MeAde) DNA glycosylase repair gene (MAG) by its expression in glycosylase-deficient Escherichia coli alkA tag...
Suppression of Escherichia coli alkB mutants by Saccharomyces cerevisiae genes.
Wei, Y F, Chen, B J, Samson, L
The alkB gene is one of a group of alkylation-inducible genes in Escherichia coli, and its product protects cells from SN2-type alkylating agents such as methyl methanesulfonate (MMS). However, the...
The Escherichia coli AlkB protein protects human cells against alkylation-induced toxicity.
Chen, B J, Carroll, P, Samson, L
Escherichia coli can ameliorate the toxic effects of alkylating agents either by preventing DNA alkylation or by repairing DNA alkylation damage. The alkylation-sensitive phenotype of E. coli alkB...
Escherichia coli expresses two DNA repair methyltransferases (MTases) that repair the mutagenic O6-methylguanine (O6MeG) and O4-methylthymine (O4MeT) DNA lesions; one is the product of the inducible...
Rebeck, G W, Smith, C M, Goad, D L, Samson, L
Escherichia coli has two DNA repair methyltransferases (MTases): the 39-kilodalton (kDa) Ada protein, which can undergo proteolysis to an active 19-kDa fragment, and the 19-kDa DNA MTase II. We...
Schendel, P F, Defais, M, Jeggo, P, Samson, L, Cairns, J
Mutagenesis by simple alkylating agents is thought to occur by either a lexA+-dependent process called error-prone repair or a lex-independent process often attributed to mispairing during...
A second DNA methyltransferase repair enzyme in Escherichia coli.
Rebeck, G W, Coons, S, Carroll, P, Samson, L
The Escherichia coli ada-alkB operon encodes a 39-kDa protein (Ada) that is a DNA-repair methyltransferase and a 27-kDa protein (AlkB) of unknown function. By DNA blot hybridization analysis we show...
Chen, J, Derfler, B, Maskati, A, Samson, L
If eukaryotic genes could protect bacteria with defects in DNA repair, this effect could be exploited for the isolation of eukaryotic DNA repair genes. We have thus cloned a DNA repair gene from...
We previously showed that the expression of the Saccharomyces cerevisiae MAG 3-methyladenine (3MeA) DNA glycosylase gene, like that of the E. coli alkA 3MeA DNA glycosylase gene, is induced by...
We previously cloned a yeast DNA fragment that, when fused with the bacterial lacZ promoter, produced O6-methylguanine DNA repair methyltransferase (MGT1) activity and alkylation resistance in...
Xiao, W, Singh, K K, Chen, B, Samson, L
The Saccharomyces cerevisiae MAG gene encodes a 3-methyladenine DNA glycosylase that protects cells from killing by alkylating agents. MAG mRNA levels are induced not only by alkylating agents but...
Suppression of human DNA alkylation-repair defects by Escherichia coli DNA-repair genes.
Samson, L, Derfler, B, Waldstein, E A
The ada-alkB operon protects Escherichia coli against the effects of many alkylating agents. We have subcloned it into the pSV2 mammalian expression vector to yield pSV2ada-alkB, and this plasmid has...
Engelward, B P, Dreslin, A, Christensen, J, Huszar, D, Kurahara, C, Samson, L
In Escherichia coli, the repair of 3-methyladenine (3MeA) DNA lesions prevents alkylation-induced cell death because unrepaired 3MeA blocks DNA replication. Whether this lesion is cytotoxic to...
Xiao, W, Derfler, B, Chen, J, Samson, L
We previously identified and characterized biochemically an O6-methylguanine (O6MeG) DNA repair methyltransferase (MTase) in the yeast Saccharomyces cerevisiae and showed that it recognizes both...
Samson, L, Thomale, J, Rajewsky, M F
The in vivo removal of three different O-alkylated bases from DNA was measured in Escherichia coli. Using monoclonal antibodies specific for O6-methylguanine, O6-ethylguanine and O4-ethylthymine we...
Dosanjh, M K, Chenna, A, Kim, E, Fraenkel-Conrat, H, Samson, L, Singer, B
We have previously reported that human cells and tissues contain a 1,N6-ethenoadenine (epsilon A) binding protein, which, through glycosylase activity, releases both 3-methyladenine (m3A) and epsilon...
Chen, J, Derfler, B, Samson, L
We previously cloned a DNA fragment from Saccharomyces cerevisiae that suppressed the alkylation sensitivity of Escherichia coli glycosylase deficient mutants and we showed that it apparently...
OBJECTIVE: To provide Canadian health care workers with evidence-based guidelines for universal counselling about HIV testing and the offering of such testing to all pregnant women. OPTIONS:...
Maze, R, Carney, J P, Kelley, M R, Glassner, B J, Williams, D A, Samson, L
The chloroethylnitrosourea (CNU) alkylating agents are commonly used for cancer chemotherapy, but their usefulness is limited by severe bone marrow toxicity that causes the cumulative depletion of...
Replication protein A binds to regulatory elements in yeast DNA repair and DNA metabolism genes.
Saccharomyces cerevisiae responds to DNA damage by arresting cell cycle progression (thereby preventing the replication and segregation of damaged chromosomes) and by inducing the expression of...
Three genes that participate in the repair of DNA alkylation damage were recently cloned from Saccharomyces cerevisiae: the MGT1 O6-methylguanine DNA methyltransferase gene, the MAG 3-methyladenine...
Matijasevic, Z, Boosalis, M, Mackay, W, Samson, L, Ludlum, D B
A eukaryotic 3-methyladenine DNA glycosylase gene, the Saccharomyces cerevisiae MAG gene, was shown to prevent N-(2-chloroethyl)-N-nitrosourea toxicity. Disruption of the MAG gene by insertion of the...
Samson, L, Derfler, B, Boosalis, M, Call, K
We described previously the isolation of a Saccharomyces cerevisiae 3-methyladenine (3-MeAde) DNA glycosylase repair gene (MAG) by its expression in glycosylase-deficient Escherichia coli alkA tag...
Suppression of Escherichia coli alkB mutants by Saccharomyces cerevisiae genes.
Wei, Y F, Chen, B J, Samson, L
The alkB gene is one of a group of alkylation-inducible genes in Escherichia coli, and its product protects cells from SN2-type alkylating agents such as methyl methanesulfonate (MMS). However, the...
The Escherichia coli AlkB protein protects human cells against alkylation-induced toxicity.
Chen, B J, Carroll, P, Samson, L
Escherichia coli can ameliorate the toxic effects of alkylating agents either by preventing DNA alkylation or by repairing DNA alkylation damage. The alkylation-sensitive phenotype of E. coli alkB...
Escherichia coli expresses two DNA repair methyltransferases (MTases) that repair the mutagenic O6-methylguanine (O6MeG) and O4-methylthymine (O4MeT) DNA lesions; one is the product of the inducible...
Rebeck, G W, Smith, C M, Goad, D L, Samson, L
Escherichia coli has two DNA repair methyltransferases (MTases): the 39-kilodalton (kDa) Ada protein, which can undergo proteolysis to an active 19-kDa fragment, and the 19-kDa DNA MTase II. We...
Schendel, P F, Defais, M, Jeggo, P, Samson, L, Cairns, J
Mutagenesis by simple alkylating agents is thought to occur by either a lexA+-dependent process called error-prone repair or a lex-independent process often attributed to mispairing during...
A second DNA methyltransferase repair enzyme in Escherichia coli.
Rebeck, G W, Coons, S, Carroll, P, Samson, L
The Escherichia coli ada-alkB operon encodes a 39-kDa protein (Ada) that is a DNA-repair methyltransferase and a 27-kDa protein (AlkB) of unknown function. By DNA blot hybridization analysis we show...
Chen, J, Derfler, B, Maskati, A, Samson, L
If eukaryotic genes could protect bacteria with defects in DNA repair, this effect could be exploited for the isolation of eukaryotic DNA repair genes. We have thus cloned a DNA repair gene from...
We previously showed that the expression of the Saccharomyces cerevisiae MAG 3-methyladenine (3MeA) DNA glycosylase gene, like that of the E. coli alkA 3MeA DNA glycosylase gene, is induced by...
We previously cloned a yeast DNA fragment that, when fused with the bacterial lacZ promoter, produced O6-methylguanine DNA repair methyltransferase (MGT1) activity and alkylation resistance in...
Xiao, W, Singh, K K, Chen, B, Samson, L
The Saccharomyces cerevisiae MAG gene encodes a 3-methyladenine DNA glycosylase that protects cells from killing by alkylating agents. MAG mRNA levels are induced not only by alkylating agents but...
Suppression of human DNA alkylation-repair defects by Escherichia coli DNA-repair genes.
Samson, L, Derfler, B, Waldstein, E A
The ada-alkB operon protects Escherichia coli against the effects of many alkylating agents. We have subcloned it into the pSV2 mammalian expression vector to yield pSV2ada-alkB, and this plasmid has...
Engelward, B P, Dreslin, A, Christensen, J, Huszar, D, Kurahara, C, Samson, L
In Escherichia coli, the repair of 3-methyladenine (3MeA) DNA lesions prevents alkylation-induced cell death because unrepaired 3MeA blocks DNA replication. Whether this lesion is cytotoxic to...
Xiao, W, Derfler, B, Chen, J, Samson, L
We previously identified and characterized biochemically an O6-methylguanine (O6MeG) DNA repair methyltransferase (MTase) in the yeast Saccharomyces cerevisiae and showed that it recognizes both...
Samson, L, Thomale, J, Rajewsky, M F
The in vivo removal of three different O-alkylated bases from DNA was measured in Escherichia coli. Using monoclonal antibodies specific for O6-methylguanine, O6-ethylguanine and O4-ethylthymine we...
Dosanjh, M K, Chenna, A, Kim, E, Fraenkel-Conrat, H, Samson, L, Singer, B
We have previously reported that human cells and tissues contain a 1,N6-ethenoadenine (epsilon A) binding protein, which, through glycosylase activity, releases both 3-methyladenine (m3A) and epsilon...
Chen, J, Derfler, B, Samson, L
We previously cloned a DNA fragment from Saccharomyces cerevisiae that suppressed the alkylation sensitivity of Escherichia coli glycosylase deficient mutants and we showed that it apparently...
OBJECTIVE: To provide Canadian health care workers with evidence-based guidelines for universal counselling about HIV testing and the offering of such testing to all pregnant women. OPTIONS:...
INTERTEMPORAL SUBSTITUTION AND DURABLE GOODS: AN EMPIRCAL ANALYSIS.
substitution ; goods ; economic analysis ; macroeconomics
FLUCTUATIONS IN EMPLOYMENT GROWTH: NATIONAL OR SECTOR- SPECIFFIC DISTURBANCES
employment ; monetary policy ; econometrics ; evaluation
La Determination des Primes de Risque: Une Approche Dynamique avec Attentes Rationnelles.
marche financier ; information ; taux d'interet
Cycles economiques au Senegal: Une approche RBC.
Carmichael, B., Keita, S., Samson, L.
macroeconomics
Expected returns and economic risk in Canadian financial markets
This article estimates a linear factor model that links asset return fluctuations to: time-varying expected returns, to economic factors innovations and to a residual idiosyncratic risk. It considers...