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J. F. R. Moreel G. Roizes A. E. Evans D. Arveiler J. P. Cambou C. Souriau H. J. Parra E. Desmarais J. C. Fruchart P. Ducimetière F. Cambien 《Human genetics》1992,89(2):169-175
Summary The polymorphism affecting codon 4311 of the apolipoprotein B gene (ApoB/4311) was investigated in a large case-control study in two French and one Northern Irish geographically defined populations. Cases were recruited 3 to 9 months after a myocardial infarction (MI) and controls were randomly selected from the population. The polymorphism was assessed using allele-specific oligonucleotides (ASO). The genotype frequencies of the ApoB/4311 polymorphism did not differ in Northern Ireland and France and were in Hardy-Weinberg equilibrium in all groups; strong associations with three other polymorphisms of the ApoB gene (XbaI, EcoRI, VNTR(34 repeats)) were observed and it was possible to identify highly sensitive and specific markers of the ApoB/4311 rare variant. Homozygotes for the ApoB 4311 rare variant were slightly less frequent in cases than in controls: 22 (4.4%) and 35 (6.7%) respectively (population adjusted 2=3.3 P<0.07), especially in Belfast: 6 (3.1%) and 12 (7.6%), respectively (P<0.06). Several lipid and lipoprotein parameters were measured. Consistently among control groups, rare homozygotes had lower mean levels of ApoB (P<0.02), triglycerides (P<0.02), and lipoprotein particles containing ApoE and ApoB (LpE:B; P<0.001) and a higher mean level of lipoprotein particles containing ApoAI and not ApoAII (LpAI; P<0.02) than heterozygotes and frequent homozygotes combined. The strong association between the ApoB/4311 polymorphism and LpE:B was also observed in patients with MI. When present in the homozygous form, the ApoB/ 4311 AsnSer variant is associated with a lipoprotein profile that is apparently favourable. 相似文献
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The development of potent non-peptidic PTP-1B inhibitors 总被引:2,自引:0,他引:2
Dufresne C Roy P Wang Z Asante-Appiah E Cromlish W Boie Y Forghani F Desmarais S Wang Q Skorey K Waddleton D Ramachandran C Kennedy BP Xu L Gordon R Chan CC Leblanc Y 《Bioorganic & medicinal chemistry letters》2004,14(4):1039-1042
The SAR from our peptide libraries was exploited to design a series of potent deoxybenzoin PTP-1B inhibitors. The introduction of an ortho bromo substituent next to the difluoromethylphosphonate warhead gave up to 20-fold increase in potency compared to the desbromo analogues. In addition, these compounds were orally bioavailable and active in the animal models of non-insulin dependent diabetes mellitus (NIDDM). 相似文献
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Galtier N Bonhomme F Moulia C Belkhir K Caminade P Desmarais E Duquesne JJ Orth A Dod B Boursot P 《Cytogenetic and genome research》2004,105(2-4):385-394
Comparative genomics has developed by comparison of distantly related genomes, for which the link between the reported evolutionary changes and species development/physiology/ecology is not obvious. It is argued that the mouse (genus Mus) is an optimal model for microevolutionary genomics in vertebrates. This is because the mouse genome sequence, physical and genetic map have been completed, because mouse genetics, morpho-anatomy, pathology, behavior and ecology are well-studied, and because the Mus genus is a diverse, well- documented taxon, allowing comparative studies at the level of individual, population, subspecies, and species. The potential of the interaction between mouse genome and mouse biodiversity is illustrated by recent studies of speciation in the house mouse Mus musculus, and studies about the evolution of isochores, the peculiar pattern of GC-content variation across mammalian genomes. 相似文献
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We analysed levels of genetic differentiation between nine local urban colonies of stray cats using eight coat colour and nine microsatellite loci. Both types of markers revealed a strong differentiation between colonies (FST = 0.15 and 0.09 for coat colour and microsatellite loci, respectively). Three coat colour loci showed extreme levels of genetic differentiation comparatively to other loci and are strongly suspected to be under divergent selective pressures. Microsatellite loci showed significant heterozygote deficiency within colonies (FIS = 0.14), suggesting that coat colour loci are not appropriate to investigate genetic structure at a fine scale because coat colour allele frequencies are based on Hardy-Weinberg equilibrium. The reported pattern conformed to that predicted from the social structuring of cat colonies: aggressive exclusion of immigrants, inbreeding and very low dispersal rate. 相似文献
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Ruffolo SC Forsell PK Yuan X Desmarais S Himms-Hagen J Cromlish W Wong KK Kennedy BP 《The Journal of biological chemistry》2007,282(42):30423-30433
Although protein-tyrosine phosphatase 1B (PTP-1B) is a negative regulator of insulin action, adipose tissue from PTP-1B-/- mice does not show enhanced insulin-stimulated insulin receptor phosphorylation. Investigation of glucose uptake in isolated adipocytes revealed that the adipocytes from PTP-1B-/- mice have a significantly attenuated insulin response as compared with PTP-1B+/+ adipocytes. This insulin resistance manifests in PTP-1B-/- animals older than 16 weeks of age and could be partially rescued by adenoviral expression of PTP-1B in null adipocytes. Examination of adipose signaling pathways found that the basal p70S6K activity was at least 50% higher in adipose from PTP-1B-/- mice compared with wild type animals. The increased basal activity of p70S6K in PTP-1B-/- adipose correlated with decreases in IR substrate-1 protein levels and insulin-stimulated Akt/protein kinase B activity, explaining the decrease in insulin sensitivity even as insulin receptor phosphorylation was unaffected. The insulin resistance of the of the PTP-1B-/- adipocytes could also be rescued by treatment with rapamycin, suggesting that in adipose the loss of PTP-1B results in basal activation of mTOR (mammalian target of rapamycin) complex 1 leading to a tissue-specific insulin resistance. 相似文献
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Gauthier JY Black WC Courchesne I Cromlish W Desmarais S Houle R Lamontagne S Li CS Massé F McKay DJ Ouellet M Robichaud J Truchon JF Truong VL Wang Q Percival MD 《Bioorganic & medicinal chemistry letters》2007,17(17):4929-4933
Highly potent, selective, and bioavailable inhibitors of human, mouse, or rat cathepsin S are described. The key structural features combine a sulfonyl moiety attached to a large group in P2 and a small substituent in P3. 相似文献
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Black WC Bayly CI Davis DE Desmarais S Falgueyret JP Léger S Li CS Massé F McKay DJ Palmer JT Percival MD Robichaud J Tsou N Zamboni R 《Bioorganic & medicinal chemistry letters》2005,15(21):4741-4744
The P2-P3 amide of dipeptide cathepsin K inhibitors can be replaced by the metabolically stable trifluoroethylamine group. The non-basic nature of the nitrogen allows the important hydrogen bond to Gly66 to be made. The resulting compounds are 10- to 20-fold more potent than the corresponding amide derivatives. Compound 8 is a 5 pM inhibitor of human cathepsin K with >10,000-fold selectivity over other cathepsins. 相似文献