High-efficiency third-generation silicon solar cells     

D. S. Strebkov  V. I. Polyakov 《Russian Agricultural Sciences》2011,37(4):345-349

The results of investigating third-generation matrix silicon solar cells with an efficiency of more than 25% during conversion of concentrated solar radiation are given. Electrical and optical characteristics are discussed. Modern technologies of semiconductor electronics and nanotechnology will soon allow increasing the efficiency of matrix silicon solar cells to 40%.  相似文献   

The relative effect of genomic information on efficiency of Bayesian analysis of the mixed linear model with unknown variance     

Viktor Milkevych  Per Madsen  Hongding Gao  Just Jensen 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2021,138(1):14-22

This work focuses on the effects of variable amount of genomic information in the Bayesian estimation of unknown variance components associated with single‐step genomic prediction. We propose a quantitative criterion for the amount of genomic information included in the model and use it to study the relative effect of genomic data on efficiency of sampling from the posterior distribution of parameters of the single‐step model when conducting a Bayesian analysis with estimating unknown variances. The rate of change of estimated variances was dependent on the amount of genomic information involved in the analysis, but did not depend on the Gibbs updating schemes applied for sampling realizations of the posterior distribution. Simulation revealed a gradual deterioration of convergence rates for the locations parameters when new genomic data were gradually added into the analysis. In contrast, the convergence of variance components showed continuous improvement under the same conditions. The sampling efficiency increased proportionally to the amount of genomic information. In addition, an optimal amount of genomic information in variance–covariance matrix that guaranty the most (computationally) efficient analysis was found to correspond a proportion of animals genotyped ***0.8. The proposed criterion yield a characterization of expected performance of the Gibbs sampler if the analysis is subject to adjustment of the amount of genomic data and can be used to guide researchers on how large a proportion of animals should be genotyped in order to attain an efficient analysis.  相似文献   

Die Veränderung einiger Bodeneigenschaften durch Vertiefung der Ackerkrume     

Kurt Rauhe  Viktor Koepke 《Archives of Agronomy and Soil Science》2013,59(6-7):567-581

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Synthesis of chiral and achiral pheromones by ring opening in products of natural and petrochemical origin     

Viktor N. Odinokov 《Pest management science》1995,44(1):94-96

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Osteoblastic osteosarcoma in a Grey Mouse Lemur (Microcebus murinus) - short communication     

Liptovszky M  Perge E  Molnár V  Sós E 《Acta veterinaria Hungarica》2011,59(4):433-437

The Grey Mouse Lemur (Microcebus murinus) is a nocturnal lemur species that lives only in Madagascar. It is one of the most abundant lemur species and its native populations are not endangered, but animals belonging to this species are rarely exhibited in zoos. While tumours are quite frequently described in other primates, there are very few publications about neoplasia in lemurs. In this case report we describe a mandibular osteoblastic osteosarcoma in a Grey Mouse Lemur (Microcebus murinus). To the best of the authors' knowledge, this is the first scientific article describing osteosarcoma in a prosimian and also reporting a tumour in the mandible in this taxon.  相似文献   

Diagnostic value of molecular markers linked to the eyespot resistance gene <Emphasis Type="Italic">Pch1</Emphasis> in wheat   总被引：1，自引：0，他引：1  

Nina Meyer  Volker Lind  Magdalena Heindorf  Viktor Korzun  Wolfgang Friedt  Frank Ordon 《Euphytica》2011,177(2):267-275

Eyespot is a major disease of common wheat (Triticum aestivum L.) in temperate climates and causes yield losses of up to 40%. The causal agents of eyespot are Oculimacula acuformis (syn. Tapesia acuformis; anamorph: Helgardia acuformis syn. Pseudocercosporella herpotrichoides var. acuformis) and O. yallundae (syn. T. yallundae; anamorph: H. yallundae syn. P. h. var. herpotrichoides). Pch1 located on chromosome 7DL is the most important and most effective resistance gene, but its use in practical breeding is limited because of difficulties in phenotyping and the fact that markers like XustSSR2001-7DL are often population-specific in German wheat cultivars. Therefore, based on results obtained for endopeptidase Ep-D1a, which is very closely linked to Pch1, molecular markers located in the terminal region of chromosome 7DL were analysed in three DH (double haploid) populations. In a next step these molecular markers were validated on a set of German winter wheat cultivars to obtain information on their usefulness for marker assisted selection (MAS). Based on the analysis of 127 DH-lines, linkage to Pch1 (Ep-D1) was obtained for Xorw1, Xorw5, Xorw6, Xcfd175, Xbarc76, Xwmc14, and Xcfa2040. Analyses of 104 German winter wheat cultivars showed that Xorw1, Xorw6 and the SSR Xcfd175 of these markers are well suited for MAS in German wheat breeding.  相似文献   

Hydrogen clusters in clathrate hydrate     

Mao WL  Mao HK  Goncharov AF  Struzhkin VV  Guo Q  Hu J  Shu J  Hemley RJ  Somayazulu M  Zhao Y 《Science (New York, N.Y.)》2002,297(5590):2247-2249

High-pressure Raman, infrared, x-ray, and neutron studies show that H2 and H2O mixtures crystallize into the sII clathrate structure with an approximate H2/H2O molar ratio of 1:2. The clathrate cages are multiply occupied, with a cluster of two H2 molecules in the small cage and four in the large cage. Substantial softening and splitting of hydrogen vibrons indicate increased intermolecular interactions. The quenched clathrate is stable up to 145 kelvin at ambient pressure. Retention of hydrogen at such high temperatures could help its condensation in planetary nebulae and may play a key role in the evolution of icy bodies.  相似文献   

Using habitat extent and composition to predict the occurrence of woodland birds in fragmented landscapes     

Polyakov  Maksym  Rowles  Alexei D.  Radford  James Q.  Bennett  Andrew F.  Park  Geoff  Roberts  Anna  Pannell  David 《Landscape Ecology》2013,28(2):329-341

Landscape Ecology - The removal, alteration and fragmentation of habitat are key causes of biodiversity decline worldwide. In Australia, temperate woodlands have been disproportionately cleared...  相似文献   

Incomplete endothelialization of an intravascular implant and fatal late‐onset bacterial ductal arteritis in a dog with occluded patent ductus arteriosus          下载免费PDF全文

Niek Jozef Beijerink  Wilhelmina Bergmann  Viktor Szatmári 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2018,32(3):1155-1159

An 18‐month‐old male Akita Inu dog developed fever and lameness 8 months after successful transcatheter closure of a patent ductus arteriosus with an Amplatz Canine Duct Occluder (ACDO). Corynebacterium species were cultured from 3 blood samples. Echocardiography showed a vegetative process on the aortic valves. The dog died spontaneously 3 days after development of the initial signs. Necropsy confirmed the presence of bacterial ductal arteritis and myocarditis, and revealed an incomplete endothelialization of the intraductal metal implant. The reason for the lack of (neo)endothelialization of the ACDO remains unknown. We conclude that late‐onset bacterial device‐related ductal arteritis can develop in dogs where the implant is incompletely covered by a protective endothelial layer.  相似文献   

Oligogenic control of resistance to soil‐borne viruses SBCMV and WSSMV in rye (Secale cereale L.)          下载免费PDF全文

Wiltrud Erath  Eva Bauer  Ute Kastirr  Malthe Schmidt  Viktor Korzun  Brigitta Schmiedchen  Peer Wilde  Chris‐Carolin Schön 《Plant Breeding》2016,135(5):552-559

Rye production in European growing areas is constrained by the soilborne cereal mosaic virus (SBCMV) and the wheat spindle streak mosaic virus (WSSMV). To date, no European rye cultivars are known to exhibit resistance against these viruses. In this study, we pursued a quantitative trait locus (QTL) mapping strategy to identify genomic regions for resistance to SBCMV and WSSMV in rye. Three populations, each comprising 100 lines segregating for resistance to SBCMV and/or WSSMV, were evaluated for disease response at two years in three locations in Germany where soils are naturally infested with SBCMV and WSSMV. In the combined analysis across environments, one QTL for SBCMV resistance on chromosome 5R explained 31.9% of the phenotypic variation in one of the populations. For WSSMV resistance, one QTL explaining up to 64.0% of the phenotypic variation was detected on chromosome 7R in each of the three populations. On the Triticeae homoeologous group 5, we found evidence for synteny of the major QTL for SBCMV resistance between the wheat and rye genomes.  相似文献