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排序方式: 共有172条查询结果,搜索用时 46 毫秒
51.
52.
Beatriz Sanz-Bernardo Ismar R. Haga Najith Wijesiriwardana Sanjay Basu Will Larner Adriana V. Diaz Zoë Langlands Eric Denison Joanne Stoner Mia White Christopher Sanders Philippa C. Hawes Anthony J. Wilson John Atkinson Carrie Batten Luke Alphey Karin E. Darpel Simon Gubbins Philippa M. Beard 《Journal of virology》2021,95(9)
53.
Larner G Cooper A Lyapustina S Leiner S Christopher D Strickland H Golden M Delzeit HJ Friedman EM 《AAPS PharmSciTech》2011,12(4):1144-1156
The goal of this article is to discuss considerations regarding implementation of the parametric tolerance interval two one-sided
test (PTI-TOST) for delivered dose uniformity (DDU) of orally inhaled products (OIPs). That test was proposed by FDA in 2005
as an alternative to the counting test described in the 1998 draft FDA guidance for metered dose inhalers and dry powder inhalers.
The 2005 PTI-TOST, however, still has not found much use in practice despite the general desirability of parametric approaches
in modern pharmaceutical quality control. A key reason for its slow uptake is that it rejects, with high probability, batches
whose quality is considered acceptable by all other published regulatory and pharmacopeial standards as well as by the DDU
specifications for many approved OIPs. Manufacturers therefore continue using nonparametric counting tests for control of
DDU. A simulated case study presented here compares the consequences of the PTI-TOST compared to the counting test. The article
discusses three possibilities that would help increase the uptake of the PTI-TOST approach, namely: product-specific quality
standards, a different default standard suitable for the majority of OIPs, and integration of the PTI-TOST with a continuous
verification control strategy rather than using it as an isolated-batch (transactional) end-product testing. In any of these
efforts, if a parametric test is used, it is critical not to set the target quality close to, or at the boundary of the process/product capabilities, because PTI tests are designed
to reject with high probability the identified target quality. 相似文献
54.
Increasing the sensitivity of glioblastoma cells to radiation is a promising approach to improve survival in patients with glioblastoma multiforme (GBM). This study aims to determine if serine/threonine phosphatase (protein phosphatase 6 (PP6)) is a molecular target for GBM radiosensitization treatment. The GBM orthotopic xenograft mice model was used in this study. Our data demonstrated that the protein level of PP6 catalytic subunit (PP6c) was upregulated in the GBM tissue from about 50% patients compared with the surrounding tissue or control tissue. Both the in vitro survival fraction of GBM cells and the patient survival time were highly correlated or inversely correlated with PP6c expression (R2=0.755 and −0.707, respectively). We also found that siRNA knockdown of PP6c reduced DNA-dependent protein kinase (DNA-PK) activity in three different GBM cell lines, increasing their sensitivity to radiation. In the orthotopic mice model, the overexpression of PP6c in GBM U87 cells attenuated the effect of radiation treatment, and reduced the survival time of mice compared with the control mice, while the PP6c knocking-down improved the effect of radiation treatment, and increased the survival time of mice. These findings demonstrate that PP6 regulates the sensitivity of GBM cells to radiation, and suggest small molecules disrupting or inhibiting PP6 association with DNA-PK is a potential radiosensitizer for GBM. 相似文献
55.
Szczepanek K Chen Q Derecka M Salloum FN Zhang Q Szelag M Cichy J Kukreja RC Dulak J Lesnefsky EJ Larner AC 《The Journal of biological chemistry》2011,286(34):29610-29620
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Joseph Larner 《Experimental diabetes research》2002,3(1):47-60
In this review we discuss the biological significance
of D-chiro-inositol, originally discovered
as a component of a putative mediator of
intracellular insulin action, where as a putative
mediator, it accelerates the dephosphorylation
of glycogen synthase and pyruvate dehydrogenase,
rate limiting enzymes of non-oxidative
and oxidative glucose disposal.Early studies demonstrated a linear relationship
between its decreased urinary excretion
and the degree of insulin resistance present.
When tissue contents, including muscle, of type
2 diabetic subjects were assayed, they demonstrated
a more general body deficiency.
Administration of D-chiro-inositol to diabetic
rats, Rhesus monkeys and now to humans
accelerated glucose disposal and sensitized
insulin action.A defect in vivo in the epimerization of myoinositol to chiro-inositol in insulin sensitive tissues
of the GK type 2 diabetic rat has been elucidated.
Thus, administered D-chiro-inositol
may act to bypass a defective normal epimerization
of myo-inositol to D-chiro-inositol
associated with insulin resistance and act to at
least partially restore insulin sensitivity and glucose
disposal. 相似文献
58.
F Dong Y Qiu T Yi I P Touw A C Larner 《Journal of immunology (Baltimore, Md. : 1950)》2001,167(11):6447-6452
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