全文获取类型
收费全文 | 162篇 |
免费 | 21篇 |
国内免费 | 1篇 |
专业分类
184篇 |
出版年
2023年 | 1篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 4篇 |
2018年 | 7篇 |
2017年 | 5篇 |
2016年 | 5篇 |
2015年 | 9篇 |
2014年 | 10篇 |
2013年 | 10篇 |
2012年 | 13篇 |
2011年 | 8篇 |
2010年 | 5篇 |
2009年 | 10篇 |
2008年 | 9篇 |
2007年 | 14篇 |
2006年 | 8篇 |
2005年 | 7篇 |
2004年 | 7篇 |
2003年 | 10篇 |
2002年 | 8篇 |
2001年 | 2篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 3篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1942年 | 1篇 |
1934年 | 1篇 |
排序方式: 共有184条查询结果,搜索用时 15 毫秒
101.
102.
Joachim Dorfer Gerlinde Layh Jürgen Ebacher Franz Lingens 《FEMS microbiology letters》1985,28(2):151-155
Abstract Indirect immunofluorescence tests with antisera against whole cells of Phenylobacterium immobile strains revealed a serological relationship to Pseudomonas vesicularis, Aquaspirillum itersonii and Rhodospirillum rubrum , three members of the purple nonsulfur bacteria (group I) and also to Gluconobacter oxydans and Azotobacter vinelandii . Antisera against whole cells of Gluconobacter oxydans and Pseudomonas vesicularis reacted positively with the Phenylobacterium immobile strains, tested. Furthermore, a serological relationship of Gluconobacter oxydans to Acetobacter aceti , and of Pseudomonas vesicularis to Pseudomonas diminuta and Aquaspirillum itersonii could be demonstrated. 相似文献
103.
Xander W Huijsdens Beatrix J van Dijke Emile Spalburg Marga G van Santen-Verheuvel Max EOC Heck Gerlinde N Pluister Andreas Voss Wim JB Wannet Albert J de Neeling 《Annals of clinical microbiology and antimicrobials》2006,5(1):1-4
Background
Female genital tuberculosis is an uncommon disease that is rarely diagnosed in developed countries.Case presentation
A 61-year-old postmenopausal woman who had undergone surgery and treated with adjuvant chemotherapy for infiltrating ductal carcinoma of the breast five years ago, presented with bloody vaginal discharge, fatigue, weight loss, and low grade fevers at night for two months. Histological examination of the endometrium, done based on the suspicion of a second primary cancer due to the tamoxifen therapy, revealed a granulomatous reaction. Liquid and solid mycobacterial cultures of the tissues were performed. Although the acid fast staining was negative, the liquid culture was positive for Mycobacterium tuberculosis. Involvement of other systems was not detected. The patient was treated with a three-drug antituberculosis regimen for 9 months and recovered fully.Conclusion
Female genital tuberculosis is a rare but curable disease that should be included in the differential diagnosis of women with menstrual problems. Early diagnosis is important and may prevent unnecessary invasive procedures for the patient. 相似文献104.
Alejandro Vélez Gerlinde H?bel Noah M. Gordon Mark A. Bee 《Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology》2012,198(12):891-904
Despite the importance of perceptually separating signals from background noise, we still know little about how nonhuman animals solve this problem. Dip listening, an ability to catch meaningful ‘acoustic glimpses’ of a target signal when fluctuating background noise levels momentarily drop, constitutes one possible solution. Amplitude-modulated noises, however, can sometimes impair signal recognition through a process known as modulation masking. We asked whether fluctuating noise simulating a breeding chorus affects the ability of female green treefrogs (Hyla cinerea) to recognize male advertisement calls. Our analysis of recordings of the sounds of green treefrog choruses reveal that their levels fluctuate primarily at rates below 10?Hz. In laboratory phonotaxis tests, we found no evidence for dip listening or modulation masking. Mean signal recognition thresholds in the presence of fluctuating chorus-like noises were never statistically different from those in the presence of a non-fluctuating control. An analysis of statistical effects sizes indicates that masker fluctuation rates, and the presence versus absence of fluctuations, had negligible effects on subject behavior. Together, our results suggest that females listening in natural settings should receive no benefits, nor experience any additional constraints, as a result of level fluctuations in the soundscape of green treefrog choruses. 相似文献
105.
106.
Cardiac-type EC-coupling in dysgenic myotubes restored with Ca2+ channel subunit isoforms alpha1C and alpha1D does not correlate with current density 下载免费PDF全文
Ca(2+)-induced Ca(2+)-release (CICR)-the mechanism of cardiac excitation-contraction (EC) coupling-also contributes to skeletal muscle contraction; however, its properties are still poorly understood. CICR in skeletal muscle can be induced independently of direct, calcium-independent activation of sarcoplasmic reticulum Ca(2+) release, by reconstituting dysgenic myotubes with the cardiac Ca(2+) channel alpha(1C) (Ca(V)1.2) subunit. Ca(2+) influx through alpha(1C) provides the trigger for opening the sarcoplasmic reticulum Ca(2+) release channels. Here we show that also the Ca(2+) channel alpha(1D) isoform (Ca(V)1.3) can restore cardiac-type EC-coupling. GFP-alpha(1D) expressed in dysgenic myotubes is correctly targeted into the triad junctions and generates action potential-induced Ca(2+) transients with the same efficiency as GFP-alpha(1C) despite threefold smaller Ca(2+) currents. In contrast, GFP-alpha(1A), which generates large currents but is not targeted into triads, rarely restores action potential-induced Ca(2+) transients. Thus, cardiac-type EC-coupling in skeletal myotubes depends primarily on the correct targeting of the voltage-gated Ca(2+) channels and less on their current size. Combined patch-clamp/fluo-4 Ca(2+) recordings revealed that the induction of Ca(2+) transients and their maximal amplitudes are independent of the different current densities of GFP-alpha(1C) and GFP-alpha(1D). These properties of cardiac-type EC-coupling in dysgenic myotubes are consistent with a CICR mechanism under the control of local Ca(2+) gradients in the triad junctions. 相似文献
107.
Marcus Renner Thomas Wolf Hannah Meyer Wolfgang Hartmann Roland Penzel Alexis Ulrich Burkhard Lehner Volker Hovestadt Esteban Czwan Gerlinde Egerer Thomas Schmitt Ingo Alldinger Eva Kristin Renker Volker Ehemann Roland Eils Eva Wardelmann Reinhard Büttner Peter Lichter Benedikt Brors Peter Schirmacher Gunhild Mechtersheimer 《Genome biology》2013,14(12):r137
108.
Jean-Baptiste Coutelis Charles Géminard Pauline Spéder Magali Suzanne Astrid Gerlinde Petzoldt Stéphane Noselli 《Developmental cell》2013,24(1):89-97
Highlights? Abd-B directs the earliest steps of Drosophila left/right asymmetry establishment ? Abd-B directly regulates expression of the dextral determinant-encoding gene myoID ? Abd-B controls the two opposite dextral and sinistral left/right pathways ? Abd-B absence leads to the symmetrical development of normally asymmetric organs 相似文献
109.
Alessandra Carriero Amy Zavatsky Julie Stebbins Tim Theologis Gerlinde Lenaerts Ilse Jonkers 《Computer methods in biomechanics and biomedical engineering》2014,17(4):352-359
Children who exhibit gait deviations often present a range of bone deformities, particularly at the proximal femur. Altered gait may affect bone growth and lead to deformities by exerting abnormal stresses on the developing bones. The objective of this study was to calculate variations in the hip joint contact forces with different gait patterns. Muscle and hip joint contact forces of four children with different walking characteristics were calculated using an inverse dynamic analysis and a static optimisation algorithm. Kinematic and kinetic analyses were based on a generic musculoskeletal model scaled down to accommodate the dimensions of each child. Results showed that for all the children with altered gaits both the orientation and magnitude of the hip joint contact force deviated from normal. The child with the most severe gait deviations had hip joint contact forces 30% greater than normal, most likely due to the increase in muscle forces required to sustain his crouched stance. Determining how altered gait affects joint loading may help in planning treatment strategies to preserve correct loading on the bone from a young age. 相似文献
110.
Claas H Hinze Ndate Fall Sherry Thornton Jun Q Mo Bruce J Aronow Gerlinde Layh-Schmitt Thomas A Griffin Susan D Thompson Robert A Colbert David N Glass Michael G Barnes Alexei A Grom 《Arthritis research & therapy》2010,12(3):1-13