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91.
Su-Li Cheng Shu-Fang Zhang Subburaman Mohan Fernando Lecanda Aurora Fausto Ann H. Hunt Ernesto Canalis Louis V. Avioli 《Journal of cellular biochemistry》1998,71(3):449-458
Glucocorticoids inhibit the proliferation, but induce the differentiation, of bone marrow stromal cells into osteoblast-like cells. The mechanisms, however, are still conjectural. Since insulin-like growth factors (IGFs) have profound effects on osteoblast growth and differentiation, it is possible that glucocorticoids exert their effects on bone marrow stromal cells in part via regulation of IGFs. Therefore, we analyzed the effects of dexamethasone (Dex) on the expression of IGF I and IGF II in cultured preosteoblastic normal human bone marrow stromal cells (HBMSC). Whereas Dex decreased the concentration of IGF I in the conditioned medium since early in the treatment, the concentration of IGF II was increased progressively as culture period lengthened. As the activities of IGF I and IGF II are regulated by the IGF binding proteins (IGFBPs), we analyzed the effects of Dex on the expression of IGFBPs. Dex increased IGFBP-2 in a time-dependent manner. The increase in IGFBP-2, however, was only to the same extent as that of IGF II at most, depending on the length of treatment. Therefore, the increase in IGFBP-2 would dampen, but not eliminate, the increased IGF II activities. By contrast, Dex decreased IGFBP-3 levels, the latter increasing the bioavailability of IGF II. Although IGFBP-4 mRNA levels were stimulated by Dex, IGFBP-4 concentration in the conditioned medium was unchanged as measured by RIA. IGFBP-5 and IGFBP-6 mRNA levels were decreased by Dex in a time-dependent fashion. IGFBP-5 protein level was also decreased 1–4 days after Dex treatment. IGFBP-1 mRNA was not detectable in HBMSC. These accumulated data indicate that Dex regulates IGF I and IGF II and their binding proteins differentially in normal human bone marrow stromal cells. The progressive increase in IGF II may contribute to Dex-induced cell differentiation. J. Cell. Biochem. 71:449–458, 1998. © 1998 Wiley-Liss, Inc. 相似文献
92.
FOXM1 Transcription Factor: A New Component of Chronic Myeloid Leukemia Stem Cell Proliferation Advantage
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Manuela Mancini Fausto Castagnetti Simona Soverini Elisa Leo Caterina De Benedittis Gabriele Gugliotta Gianantonio Rosti Luana Bavaro Sara De Santis Cecilia Monaldi Margherita Martelli Maria Alessandra Santucci Michele Cavo Giovanni Martinelli 《Journal of cellular biochemistry》2017,118(11):3968-3975
93.
Carla Rodrigues Fausto Freire 《The International Journal of Life Cycle Assessment》2017,22(4):557-570
Purpose
The use of high levels of thermal insulation is a common practice towards reducing the energy consumption of the existing building stock; however, the embodied burdens associated with the additional insulation material are usually not taken into account and questions regarding the risks of over-specifying the insulation levels have been emerging, particularly for mild climate regions. This article addresses the issue presenting an integrated approach that combines life cycle assessment and thermal dynamic simulation to assess alternative retrofit strategies for the roof and exterior walls of two dwellings (from the beginning of the twentieth century), in the historic city center of Coimbra, Portugal. A comprehensive analysis of alternative insulation thicknesses (no insulation, 40, 80, and 120 mm of expanded polystyrene) was made to identify optimal thickness levels minimizing life cycle (LC) environmental impacts for a single-family house and an apartment.Methods
Embodied and operational impact trade-offs were calculated for six impact categories: climate change, ozone depletion, terrestrial acidification, freshwater eutrophication, marine eutrophication, and non-renewable primary energy. The operational energy was calculated using a dynamic thermal modeling software (EnergyPlus). The functional unit selected for this study was 1 m2 of living area over a period of 50 years.Results and discussion
The single-family house embodied impacts account for 26–57 % of total LC impacts. For insulation thicknesses larger than 80 mm, the embodied impacts are greater than operational impacts. For the apartment, embodied impacts account for 25–49 % of total LC impacts. The environmental benefits of additional insulation are very low (<3 %) for thicknesses of more than 80 mm for both roof and exterior walls. For thicknesses above the tipping point (where total LC impacts are minimized), the marginal impacts of additional insulation are higher than the benefits. The results for the apartment show that optimal insulation thicknesses (LC tipping point) range from 30 to 40 mm for the roof and from 60 to 80 mm for the exterior walls. The LC tipping point for the single-family house is achieved by combining 80–100 mm of roof insulation with 60–80 mm of exterior wall insulation.Conclusions
Extra insulation levels in temperate climates can lead to higher embodied impacts, without significant reduction in operational impacts, which can result in higher total LC impacts. The results show that a tipping point can be identified, and recommendations are provided for the roof and exterior wall retrofits of buildings from the beginning of the twentieth century.94.
Francesca Patrignani Chiara Montanari Diana I. Serrazanetti Giacomo Braschi Pamela Vernocchi Giulia Tabanelli Giuseppina P. Parpinello Andrea Versari Fausto Gardini Rosalba Lanciotti 《Annals of microbiology》2017,67(1):99-109
Wine quality is closely linked to the fermentation step, which is driven by the microbial ecology of grape and the use of selected microbial strains as well. The microbial species developing during fermentation determines the type and concentration of many substances, which contribute to the sensory properties of wine and its safety. In this view, the present work aims to characterise the yeast microbiota, chemical and sensory properties of Sangiovese red wines obtained from both biodynamic and organic agriculture. The natural yeast populations of grape musts and their evolution during spontaneous were monitored and investigated. In addition, the volatile composition, physico-chemical and safety features (ethyl-carbamate) and sensory properties of wines were evaluated. The results showed that the yeast population was mostly related to the grape management, i.e. organic or biodynamic, while the wine composition was mainly affected by the winemaking process, and then by the grape management. 相似文献
95.
Ilaria Guarniero Flavio Garoia Raffaele Di Placido Andreja Ramsak Piero Mannini Fausto Tinti 《Molecular ecology resources》2003,3(2):312-313
A microsatellite dinucleotide‐enriched library was obtained from the European squid (Loligo vulgaris) and five species‐specific dinucleotide markers were optimized. These markers are highly polymorphic with average expected heterozygosity ranging from 0.706 to 0.927 and allele number ranging from 7 to 17. This set of primers is suitable for population genetic studies. 相似文献
96.
Fausto Calderazzo Author Vitae Author Vitae Guido Pampaloni Author Vitae 《Inorganica chimica acta》2009,362(12):4291-4297
Redox processes consisting of disproportionation and syn-proportionation are reviewed with special attention to metal complexes containing carbon-based ligands, i.e. carbon monoxide or unsaturated hydrocarbons. An introduction and a survey of reactions aimed to show the large applicability of syn-proportionation reactions in the field of coordination chemistry, is followed by examples of the use of these redox processes for the preparation of catalytic precursors. The latter studies derive from the idea that if a syn-proportionation reaction can be carried out between two complexes containing different metals in different oxidation states, inter-metallic systems could be formed which may act as active catalysts, e.g. for polymerization reactions. 相似文献
97.
Edward T. Mee Neil Berry Claire Ham Ulrike Sauermann Maria T. Maggiorella Frédéric Martinon Ernst J. Verschoor Jonathan L. Heeney Roger Le Grand Fausto Titti Neil Almond Nicola J. Rose 《Immunogenetics》2009,61(5):327-339
The restricted diversity of the major histocompatibility complex (MHC) of Mauritian cynomolgus macaques provides powerful
opportunities for insight into host-viral interactions and cellular immune responses that restrict lentiviral infections.
However, little is known about the effects of Mhc haplotypes on control of SIV in this species. Using microsatellite-based
genotyping and allele-specific PCR, Mhc haplotypes were deduced for 35 macaques infected with the same stock of SIVmac251.
Class I haplotype H6 was associated with a reduction in chronic phase viraemia (p = 0.0145) while a similar association was observed for H6 class II (p = 0.0063). An increase in chronic phase viraemia, albeit an insignificant trend, was observed in haplotype H5-positive animals.
These results further emphasise the value of genetically defined populations of non-human primates in AIDS research and provide
a foundation for detailed characterisation of MHC restricted cellular immune responses and the effects of host genetics on
SIV replication in cynomolgus macaques.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
98.
Anna Lange Consiglio Maria Elena Dell'Aquila Nadia Fiandanese Barbara Ambruosi Yoon S Cho Giampaolo Bosi Silvana Arrighi Giovanni M Lacalandra Fausto Cremonesi 《Reproductive biology and endocrinology : RB&E》2009,7(1):113-11
Background
The identification of the adipocyte-derived obesity gene product, leptin (Ob), and subsequently its association with reproduction in rodents and humans led to speculations that leptin may be involved in the regulation of oocyte and preimplantation embryo development. In mice and pigs, in vitro leptin addition significantly increased meiotic resumption and promoted preimplantation embryo development in a dose-dependent manner. This study was conducted to determine whether leptin supplementation during in vitro maturation (IVM) to horse oocytes could have effects on their developmental capacity after fertilization by IntraCytoplasmic Sperm Injection (ICSI). 相似文献99.
Anne-Lise Pitel Anne-Marie Aupée Ga?l Chételat Florence Mézenge Hélène Beaunieux Vincent de la Sayette Fausto Viader Jean-Claude Baron Francis Eustache Béatrice Desgranges 《PloS one》2009,4(11)
Background
Gray matter volume studies have been limited to few brain regions of interest, and white matter and glucose metabolism have received limited research attention in Korsakoff''s syndrome (KS). Because of the lack of brain biomarkers, KS was found to be underdiagnosed in postmortem studies.Methodology/Principal Findings
Nine consecutively selected patients with KS and 22 matched controls underwent both structural magnetic resonance imaging and 18F-fluorodeoxyglucose positron emission tomography examinations. Using a whole-brain analysis, the between-group comparisons of gray matter and white matter density and relative glucose uptake between patients with KS and controls showed the involvement of both the frontocerebellar and the Papez circuits, including morphological abnormalities in their nodes and connection tracts and probably resulting hypometabolism. The direct comparison of the regional distribution and degree of gray matter hypodensity and hypometabolism within the KS group indicated very consistent gray matter distribution of both abnormalities, with a single area of significant difference in the middle cingulate cortex showing greater hypometabolism than hypodensity. Finally, the analysis of the variability in the individual patterns of brain abnormalities within our sample of KS patients revealed that the middle cingulate cortex was the only brain region showing significant GM hypodensity and hypometabolism in each of our 9 KS patients.Conclusions/Significance
These results indicate widespread brain abnormalities in KS including both gray and white matter damage mainly involving two brain networks, namely, the fronto-cerebellar circuit and the Papez circuit. Furthermore, our findings suggest that the middle cingulate cortex may play a key role in the pathophysiology of KS and could be considered as a potential in vivo brain biomarker. 相似文献100.
The genomic and gene organisation of 5S rDNA clusters have been extensively characterized in bony fish and eukaryotes, providing
general issues for understanding the molecular evolution of this multigene DNA family. By contrast, the 5S rDNA features have
been rarely investigated in cartilaginous fish (only three species). Here, we provide evidence for a dual 5S rDNA gene system
in the Rajidae by sequence analysis of the coding region (5S) and adjacent nontranscribed spacer (NTS) in five Mediterranean
species of rays (Rajidae), and in a large number of piscine taxa including lampreys and bony fish. As documented in several
bony fish, two functional 5S rDNA types were found here also in the rajid genome: a short one (I) and a long one (II), distinguished
by distinct 5S and NTS sequences. That the ancestral piscine genome had these two 5S rDNA loci might be argued from the occurrence
of homologous dual gene systems that exist in several fish taxa and from 5S phylogenetic relationships. An extensive analysis
of NTS-II sequences of Rajidae and Dasyatidae revealed the occurrence of large simple sequence repeat (SSR) regions that are
formed by microsatellite arrays. The localization and organization of SSR within the NTS-II are conserved in Rajiformes since
the Upper Cretaceous. The direct correlation between the SSRs extension and the NTS length indicated that they might play
a role in the maintenance of the larger 5S rDNA clusters in rays. The phylogenetic analysis indicated that NTS-II is a valuable
systematic tool limited to distantly related taxa of Rajiformes.
Electronic Supplementary Material Electronic Supplementary material is available for this article at
and accessible for authorised users.
[Reviewing Editor: Dr. Rafael Zardoya] 相似文献