WorldWideScience

Sample records for winterhardiness heterosis resulting

  1. Heterosis May Result in Selection Favouring the Products of Long-Distance Pollen Dispersal in Eucalyptus

    Science.gov (United States)

    Costa e Silva, João; Potts, Brad M.; Lopez, Gustavo A.

    2014-01-01

    Using native trees from near the northern and southern extremities of the relatively continuous eastern distribution of Eucalyptus globulus in Tasmania, we compared the progenies derived from natural open-pollination (OP) with those generated from within-region and long-distance outcrossing. Controlled outcrossing amongst eight parents - with four parents from each of the northern and southern regions - was undertaken using a diallel mating scheme. The progeny were planted in two field trials located within the species native range in southern Tasmania, and their survival and diameter growth were monitored over a 13-year-period. The survival and growth performances of all controlled cross types exceeded those of the OP progenies, consistent with inbreeding depression due to a combination of selfing and bi-parental inbreeding. The poorer survival of the northern regional (♀N♂N) outcrosses compared with the local southern regional outcrosses (♀S♂S) indicated differential selection against the former. Despite this mal-adaptation of the non-local ♀N♂N crosses at both southern sites, the survival of the inter-regional hybrids (♀N♂S and ♀S♂N) was never significantly different from that of the local ♀S♂S crosses. Significant site-dependent heterosis was detected for the growth of the surviving long-distance hybrids. This was expressed as mid-parent heterosis, particularly at the more northern planting site. Heterosis increased with age, while the difference between the regional ♀N♂N and ♀S♂S crosses remained insignificant at any age at either site. Nevertheless, the results for growth suggest that the fitness of individuals derived from long-distance crossing may be better at the more northern of the planting sites. Our results demonstrate the potential for early-age assessments of pollen dispersal to underestimate realised gene flow, with local inbreeding under natural open-pollination resulting in selection favouring the products of

  2. Heterosis may result in selection favouring the products of long-distance pollen dispersal in Eucalyptus.

    Directory of Open Access Journals (Sweden)

    João Costa E Silva

    Full Text Available Using native trees from near the northern and southern extremities of the relatively continuous eastern distribution of Eucalyptus globulus in Tasmania, we compared the progenies derived from natural open-pollination (OP with those generated from within-region and long-distance outcrossing. Controlled outcrossing amongst eight parents - with four parents from each of the northern and southern regions - was undertaken using a diallel mating scheme. The progeny were planted in two field trials located within the species native range in southern Tasmania, and their survival and diameter growth were monitored over a 13-year-period. The survival and growth performances of all controlled cross types exceeded those of the OP progenies, consistent with inbreeding depression due to a combination of selfing and bi-parental inbreeding. The poorer survival of the northern regional (♀N♂N outcrosses compared with the local southern regional outcrosses (♀S♂S indicated differential selection against the former. Despite this mal-adaptation of the non-local ♀N♂N crosses at both southern sites, the survival of the inter-regional hybrids (♀N♂S and ♀S♂N was never significantly different from that of the local ♀S♂S crosses. Significant site-dependent heterosis was detected for the growth of the surviving long-distance hybrids. This was expressed as mid-parent heterosis, particularly at the more northern planting site. Heterosis increased with age, while the difference between the regional ♀N♂N and ♀S♂S crosses remained insignificant at any age at either site. Nevertheless, the results for growth suggest that the fitness of individuals derived from long-distance crossing may be better at the more northern of the planting sites. Our results demonstrate the potential for early-age assessments of pollen dispersal to underestimate realised gene flow, with local inbreeding under natural open-pollination resulting in selection favouring the

  3. 'Lufkin Red' and 'Lufkin White' winter-hardy hibiscus (Hibiscus x laevis All.)

    Science.gov (United States)

    USDA ARS announces the release of ‘Lufkin Red’ and ‘Lufkin White’ winter-hardy native hibiscuses.Both clones have desirable horticultural traits in combination with demonstrated high levels of field resistance to the leaf spot complex that is problematic on winter-hardy hibiscus clones in areas wit...

  4. Effect of Low Temperature and Wheat Winter-Hardiness on Survival of Puccinia striiformis f. sp. tritici under Controlled Conditions.

    Directory of Open Access Journals (Sweden)

    Lijie Ma

    Full Text Available Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst, is one of the most important diseases of wheat worldwide. Understanding the survival of Pst during the overwintering period is critical for predicting Pst epidemics in the spring. Real-time quantitative PCR (qPCR methods quantifying Pst DNA and RNA (cDNA were developed and compared for the ability to quantify viable Pst in leaf tissues. Both qPCR of DNA and RNA can provide reliable measurement of viable Pst in plant tissues prior to the late sporulation stage for which qPCR of DNA gave a much higher estimate of fungal biomass than qPCR of RNA. The percentage of Pst biomass that was viable in detached and attached leaves under low temperatures decreased over time. Pst survived longer on attached leaves than on detached leaves. The survival of Pst in cultivars with strong winter-hardiness at 0°C and -5°C was greater than those with weak winter-hardiness. However, such differences in Pst survival among cultivars were negligible at -10, -15 and -20°C. Results indicated that Pst mycelia inside green leaves can also be killed by low temperatures rather than through death of green leaves under low temperatures. The relationship of Pst survival in attached leaves with temperature and winter-hardiness was well described by logistic models. Further field evaluation is necessary to assess whether inclusion of other factors such as moisture and snow cover could improve the model performance in predicting Pst overwintering potential, and hence the epidemic in spring.

  5. F1 generation heterosis of peanut varieties with special testa color

    International Nuclear Information System (INIS)

    Wu Lianrong; Li Zhengchao; Qiu Qingshu

    2002-01-01

    Six peanut varieties with special testa color were arranged in pairs of 10 cross combinations, and 3 agronomic characters and 7 yield characters were tested for their heterosis. The results showed that the main stem height had the most powerful heterosis among tested agronomic characters. Among yield characters, the synthetic characters--pod yield per plant and seed yield per plant had better heterosis, each has 8 combinations showed over-parent heterosis with ranges of 7.1%-73.4% and 12.1%-71.5%, respectively. The heterosis among combinations also has significant difference. In all characters except the No. of filled pods per plant, the tested white variety has more powerful heterosis than red variety when they were used as female parent

  6. Mutant heterosis in rice

    International Nuclear Information System (INIS)

    1987-01-01

    In the variety TKM6 a high yielding semidwarf mutant has been induced. This TKM6 mutant was used in test crosses with a number of other varieties and mutants to examine the extent of heterosis of dwarfs in rice and to select superior crosses. An excerpt of the published data is given. It appears from the backcross of the mutant with its original variety, that an increase in number of productive tillers occurs in the hybrid, leading to a striking grain yield increase, while the semi-dwarf culm length (the main mutant character) reverts to the normal phenotype. In the cross with IR8 on the other hand, there is only a minimal increase in tiller number but a substantial increase in TGW leading to more than 30% yield increase over the better parent

  7. Heterosis in Sweet Sorghum and Selection of a New Sweet Sorghum Hybrid for Use in Syrup

    Science.gov (United States)

    Although heterosis is well established in grain and forage sorghum [Sorghum bicolor (L.) Moench], reports of heterosis in sweet sorghum are limited to results from grain sorghum x sweet sorghum hybrids. Recent development of cytoplasmic male-sterile sweet sorghum lines allows creation of sweet sorg...

  8. Heterosis as investigated in terms of polyploidy and genetic diversity using designed Brassica juncea amphiploid and its progenitor diploid species.

    Directory of Open Access Journals (Sweden)

    Payal Bansal

    Full Text Available Fixed heterosis resulting from favorable interactions between the genes on their homoeologous genomes in an allopolyploid is considered analogous to classical heterosis accruing from interactions between homologous chromosomes in heterozygous plants of a diploid species. It has been hypothesized that fixed heterosis may be one of the causes of low classical heterosis in allopolyploids. We used Indian mustard (Brassica juncea, 2n = 36; AABB as a model system to analyze this hypothesis due to ease of its resynthesis from its diploid progenitors, B. rapa (2n = 20; AA and B. nigra (2n = 16; BB. Both forms of heterosis were investigated in terms of ploidy level, gene action and genetic diversity. To facilitate this, eleven B. juncea genotypes were resynthesized by hybridizing ten near inbred lines of B. rapa and nine of B. nigra. Three half diallel combinations involving resynthesized B. juncea (11×11 and the corresponding progenitor genotypes of B. rapa (10×10 and B. nigra (9×9 were evaluated. Genetic diversity was estimated based on DNA polymorphism generated by SSR primers. Heterosis and genetic diversity in parental diploid species appeared not to predict heterosis and genetic diversity at alloploid level. There was also no association between combining ability, genetic diversity and heterosis across ploidy. Though a large proportion (0.47 of combinations showed positive values, the average fixed heterosis was low for seed yield but high for biomass yield. The genetic diversity was a significant contributor to fixed heterosis for biomass yield, due possibly to adaptive advantage it may confer on de novo alloploids during evolution. Good general/specific combiners at diploid level did not necessarily produce good general/specific combiners at amphiploid level. It was also concluded that polyploidy impacts classical heterosis indirectly due to the negative association between fixed heterosis and classical heterosis.

  9. Hybrid marriages and phenotypic heterosis in offspring: Evidence from China.

    Science.gov (United States)

    Zhu, Chen; Zhang, Xiaohui; Zhao, Qiran; Chen, Qihui

    2018-02-19

    In genetics, heterosis refers to the phenomenon that cross-breeding within species leads to offspring that are genetically fitter than their parents and exhibit improved phenotypic characteristics. Based on the theory of heterosis and existing genetic evidence, offspring of "hybrid" marriages (spouses originating from different states/provinces/countries/areas), though relatively rare due to physical boundaries, may exhibit greater genetic fitness in terms of intelligence, height, or physical attractiveness (the "distance-performance" hypothesis). This study explores whether heterosis is a contributing factor to offspring's educational attainment in China by applying a high-dimensional fixed effects (HDFE) modelling framework to the unique 0.1% micro-sample of the 2000 Chinese Population Census data. Concerning potential endogeneity of hybrid marriages, we conduct a series of robustness checks. Reassuringly, the estimated heterosis effect remains significantly positive across various measurements, after controlling for parental educational attainments/height, environmental influences, and over a thousand region and region-by-year fixed effects. The effects in male and higher-educated offspring are found to be stronger. Results are replicated when analyzing body height using data from the China Health and Nutrition Survey. Although endogeneity of "hybrid marriages" may not be completely ruled out, the current study sheds light on the potentially beneficial effects of interprovincial migration on population-level human capital accumulation, and we hope that this paper can intrigue future studies that further address endogeneity. The implied heterosis effect could, therefore, be profound for Homo sapiens as a species from an evolutionary point of view. An additional important implication is that the overall genetic influences of parents on offspring's performance may be further decomposed into a conventional heredity effect and a heterosis effect that has been

  10. Estimation of Better Parent and Economic Heterosis for Yield and ...

    African Journals Online (AJOL)

    SARAH

    2013-11-30

    Nov 30, 2013 ... ABSTRACT. Objective: A study to estimate better parent and economic heterosis in an 8x8 diallel crosses of common beans. (Phaseolus Vulgaris L.) was undertaken at Mandura, North Western Ethiopia. Methodology and Results: Eight parents and their 28 F1 diallel crosses were grown in a randomized ...

  11. Study on combining ability, heterosis and genetic parameters of ...

    African Journals Online (AJOL)

    A study was conducted on heterosis, combining ability and genetic parameters of yield and yield components in rice. Five lines were crossed with two testers in line × tester manner to produce ten F1 hybrids. Results show that general combining ability (GCA) effect was only significant for total number of kernels per panicle, ...

  12. Heterosis and genetic variation in the litter size of purebred and crossbred mink

    DEFF Research Database (Denmark)

    Thirstrup, Janne Pia; Larsen, Peter Foged; Pertoldi, Cino

    2014-01-01

    Crosses between different mink lines from 3 Danish mink farms that use different breeding strategies were studied to estimate heterosis and variance components for litter size. The study was designed to analyze crosses between lines of the same color type, between different color types, and between...... animals originating from different farms. Effect of heterosis, color type, and variance components were estimated using Average information REML (AI-REML) algorithm implemented in the DMU package for analyzing multivariate mixed models. Females from 7 generations that gave birth to at least 1 offspring...... of the born litter; d2) were estimated. The results showed that mink of the Black color type potentially produced smaller litters compared to mink of the other studied color types. We found significant general maternal effect of heterosis for litter size. Analyses of specific heterosis showed a significant...

  13. Heterosis and antioxidant compounds of sweet corn breeding lines and their F1 hybrid

    Directory of Open Access Journals (Sweden)

    Kraptchev Boris

    2014-01-01

    Full Text Available In this research, the mid-parent heterosis and the levels of phenolic, flavonoids compounds and antioxidants activity among two selected sweet corn parental lines and their F1 hybrid Zaharina were evaluated. Substantial positive mid-parent heterosis (MPH was found for parent-hybrid triplet for ear weight and for plant height. Among all other traits, insertion height had the greatest heterosis and ear diameter had the lowest. Negative mid-parent heterosis exhibited only the trait 1000-kernel weight. Data analysis indicated significant differences in the contents of total phenolic content, total flavonoids content, water-soluble antioxidant capacity, lipid-soluble antioxidant capacity, and antioxidant activity among parent-hybrid triplet. The results suggest that F1 hybrid Zaharina can be considered as good source of natural antioxidants since it extracts were found to possess high antioxidant activity.

  14. Combining ability and heterosis effect in hexaploid wheat group

    Directory of Open Access Journals (Sweden)

    Titan Primož

    2012-01-01

    Full Text Available The main goal of hybrid wheat breeding is the identification of parents with high specific combining ability for grain yield and other agronomic traits. This kind of data facilitate the development of hybrid combinations with high level of heterosis in first filial generation (F1 generation. The use of species from the hexaploid wheat group (e.g. Triticum spelta L. Triticum compactum HOST... is representing an opportunity for the increase of heterosis level in the germplasm of common wheat (Triticum aestivum L.. The study of combining ability and heterosis effect in hexaploid wheat group was carried out using crosses between thirteen inbred lines of common wheat (6 lines x 7 testers and inter-species crosses (T. aestivum L. × T. spelta L., T. aestivum L. × T. compactum HOST, T. aestivum L. × T. sphaerococcum PERCIV., T. aestivum L. × T. macha DEKAPR. et MENABDE, T. aestivum L. × T. petropavlovskyi UDACZ. et MIGUSCH, T. aestivum L. × T. vavilovii (THUM. JAKUBZ.. The 42 common wheat F1 hybrids were tested during two seasons (2010/11 and 2011/12 on the Selection center Ptuj. The experiment was carried out in a randomized block design with four replications. The 43 interspecies F1 hybrids were tested on the same location in the season 2011/12 and the experiment was designed as an randomized block with three replications. The results were analyzed using statistical package AGROBASE generation II and STATGRAPHICS Centurion XVI. The analysis of variance was significant for both, GCA and SCA variances (P < 0,01. Generally, SCA variances were lower than GCA variances. We could state, that the improvement of heterosis level in the common wheat germplasm through the use of relatives with the same genome (genome BAD is possible. As an example we can point out the interspecies F1 hybrid between common wheat variety Garcia and an accession of the Triticum sphaerococcum PERCIV. species (accession number 01C0201227.

  15. Heterosis for superoxide dismutase, peroxidase and catalase ...

    Indian Academy of Sciences (India)

    and the direction of heterosis for SOD, POX and CAT activ- ity; and identify promising parents and single cross-hybrids. (SCHs) having better inbuilt defense systems which could be used for breeding antioxidant-rich cabbage. Materials and methods. Sixteen cabbage genotypes (all inbreds) which included five female, viz.

  16. Transcriptome analysis of wheat seedling and spike tissues in the hybrid Jingmai 8 uncovered genes involved in heterosis.

    Science.gov (United States)

    Liu, Yong-Jie; Gao, Shi-Qing; Tang, Yi-Miao; Gong, Jie; Zhang, Xiao; Wang, Yong-Bo; Zhang, Li-Ping; Sun, Ren-Wei; Zhang, Quan; Chen, Zhao-Bo; Wang, Xiang; Guo, Cai-Juan; Zhang, Sheng-Quan; Zhang, Feng-Ting; Gao, Jian-Gang; Sun, Hui; Yang, Wei-Bing; Wang, Wei-Wei; Zhao, Chang-Ping

    2018-03-05

    Transcriptome analysis was carried out for wheat seedlings and spikes from hybrid Jingmai 8 and both inbred lines to unravel mechanisms underlying heterosis. Heterosis, known as one of the most successful strategies for increasing crop yield, has been widely exploited in plant breeding systems. Despite its great importance, the molecular mechanism underlying heterosis remains elusive. In the present study, RNA sequencing (RNA-seq) was performed on the seedling and spike tissues of the wheat (Triticum aestivum) hybrid Jingmai 8 (JM8) and its homozygous parents to unravel the underlying mechanisms of wheat heterosis. In total, 1686 and 2334 genes were identified as differentially expressed genes (DEGs) between the hybrid and the two inbred lines in seedling and spike tissues, respectively. Gene Ontology analysis revealed that DEGs from seedling tissues were significantly enriched in processes involved in photosynthesis and carbon fixation, and the majority of these DEGs expressed at a higher level in JM8 compared to both inbred lines. In addition, cell wall biogenesis and protein biosynthesis-related pathways were also significantly represented. These results confirmed that a combination of different pathways could contribute to heterosis. The DEGs between the hybrid and the two inbred progenitors from the spike tissues were significantly enriched in biological processes related to transcription, RNA biosynthesis and molecular function categories related to transcription factor activities. Furthermore, transcription factors such as NAC, ERF, and TIF-IIA were highly expressed in the hybrid JM8. These results may provide valuable insights into the molecular mechanisms underlying wheat heterosis.

  17. Estimation of Better Parent and Economic Heterosis for Yield and ...

    African Journals Online (AJOL)

    The extent of better parent heterosis for yield ranged from -31.14% (Dimtu x Tabor) to 114.1% (MAM-41 x Tabor). The maximum economic heterosis (60.58 %) was observed from the hybrid MAM-41 x Tabor .Significant (P<0.05 or P<0.01) better parent heterosis was also observed for yield-associated traits. Conclusions and ...

  18. Heterosis and combining ability in a diallel among eight elite maize ...

    African Journals Online (AJOL)

    This study was conducted to determine the heterosis and combining ability of eight elite maize genotypes. The eight parents were selected based on per se and top-cross performance. The parents were crossed in diallel fashion. The resulting crosses and their parents were evaluated in a randomised complete block design ...

  19. Expression of heterosis in floral traits and fruit size in tomato ...

    African Journals Online (AJOL)

    A modified three way cross between the advanced generation of the tomato hybrids and an exotic variety with giant fruit size was initiated. The resulting hybrids were evaluated to determine the magnitude of heterosis in floral traits and fruit size. Highly significant differences were observed among the genotypes in all the ...

  20. Genetic Divergent of Tomato Lines Based on AFLP Molecular Markers and Relationship with Heterosis

    Directory of Open Access Journals (Sweden)

    M Nabipoor

    2012-10-01

    Full Text Available Tomato as a highly nutritious vegetable crop is widely grown in the world. Hybrid seed is preferably used for tomato production. Identification of superior hybrid combination is one of the most important steps in the hybrid breeding programs. Breeding of high yielding hybrids is expensive and involves testing large numbers of hybrid combinations in multi-environment trials. Successful prediction of heterosis from the genetic similarity of their parents based on molecular markers has been reported in several crops and can be very helpful in hybrid breeding. The present study was carried out to evaluate genetic divergent among tomato lines and to assess the relationship between genetic distance and heterosis among them. Thirty genotypes were examined for DNA polymorphism, using amplified fragment length polymorphisms (AFLPs. A total of 165 polymorphic variants were generated and genetic distances ranged from 0.04 to 0.23. Our result indicated that AFLP markers were successful in identification of polymorphism and genetic distances among tomato lines, but correlation of genetic distance based on AFLPs with mid-parent heterosis of yield, fruit weight, fruit number and fruit durability time was low and not useful for predicting heterosis in tomato genotypes.

  1. Estimation of Heterosis and Inbreeding Depression in Quantitative ...

    African Journals Online (AJOL)

    It is important to know the degree and direction of heterosis for its commercial exploitation. Heterosis and in-breeding depression were estimated in 8x8 half diallel crosses of rice. The planted materials consisted ofeight parental inbred lines, their F1 hybrids and F2 populations using randomized complete block design with ...

  2. Another explanation for the cause of heterosis phenomenon

    Indian Academy of Sciences (India)

    The explanation for heterosis phenomenon is based on ideas: (i) every trait of an organism depends on many genes. (ii) Inbreeding depression and heterosis are related to individual genetic diversity. To assess individual genetic diversity ofan organism, I suggest the term number of genetic properties. Assessing the ...

  3. Another explanation for the cause of heterosis phenomenon

    Indian Academy of Sciences (India)

    Abstract. The explanation for heterosis phenomenon is based on ideas: (i) every trait of an organism depends on many genes. (ii) Inbreeding depression and heterosis are related to individual genetic diversity. To assess individual genetic diversity of an organism, I suggest the term number of genetic properties. Assessing ...

  4. Another explanation for the cause of heterosis phenomenon

    Indian Academy of Sciences (India)

    ∗E-mail: nguyenthienhuyen@gmail.com. mask the deleterious traits and the hybrids have a better performance than parents. In one of the researches on effect of quantitative trait loci. (QTL) to heterosis in rice Xiao et al. (1995) stated that dom- inance is the major genetic basis of heterosis, while in other researches Li et al.

  5. Genomic architecture of biomass heterosis inArabidopsis.

    Science.gov (United States)

    Yang, Mei; Wang, Xuncheng; Ren, Diqiu; Huang, Hao; Xu, Miqi; He, Guangming; Deng, Xing Wang

    2017-07-25

    Heterosis is most frequently manifested by the substantially increased vigorous growth of hybrids compared with their parents. Investigating genomic variations in natural populations is essential to understand the initial molecular mechanisms underlying heterosis in plants. Here, we characterized the genomic architecture associated with biomass heterosis in 200 Arabidopsis hybrids. The genome-wide heterozygosity of hybrids makes a limited contribution to biomass heterosis, and no locus shows an obvious overdominance effect in hybrids. However, the accumulation of significant genetic loci identified in genome-wide association studies (GWAS) in hybrids strongly correlates with better-parent heterosis (BPH). Candidate genes for biomass BPH fall into diverse biological functions, including cellular, metabolic, and developmental processes and stimulus-responsive pathways. Important heterosis candidates include WUSCHEL , ARGOS , and some genes that encode key factors involved in cell cycle regulation. Interestingly, transcriptomic analyses in representative Arabidopsis hybrid combinations reveal that heterosis candidate genes are functionally enriched in stimulus-responsive pathways, including responses to biotic and abiotic stimuli and immune responses. In addition, stimulus-responsive genes are repressed to low-parent levels in hybrids with high BPH, whereas middle-parent expression patterns are exhibited in hybrids with no BPH. Our study reveals a genomic architecture for understanding the molecular mechanisms of biomass heterosis in Arabidopsis , in which the accumulation of the superior alleles of genes involved in metabolic and cellular processes improve the development and growth of hybrids, whereas the overall repressed expression of stimulus-responsive genes prioritizes growth over responding to environmental stimuli in hybrids under normal conditions.

  6. HERITABILITAS, NISBAH POTENSI, DAN HETEROSIS KETAHANAN KEDELAI (Glycine max [L.] Merrill TERHADAP SOYBEAN MOSAIC VIRUS

    Directory of Open Access Journals (Sweden)

    Nyimas Sa’diyah

    2016-10-01

    Full Text Available Heritability, potential ratio, and heterosis of soybean (Glycine max [L.] Merrill resistance to soybean mosaic virus. The use of soybean cultivars with resistance to SMV is a way for controlling soybean mosaic disease. The objective of this research was to estimate the disease severity, the narrow sense heritability, potential ratio and heterosis of resistance character and number of pithy pods, number of healthy seeds, and healthy seeds weight per plant of ten F1 populations of soybean crossing result to SMV infection. The experiment was arranged in a randomized complete block design in two replications. Observed characters were disease severity, number of pithy pods, number of healthy seeds, and healthy seeds weight per plant. The result of this research showed that 1 the crossing combinations those which were resistant to SMV (lower disease severity were Yellow Bean x Tanggamus, Tanggamus x Orba, and Tanggamus x Taichung, 2 the narrow sense heritability of disease severity was included in medium criteria, 3 number of pithy pods belonged to high criteria, and 4 number of healthy seeds and healthy seeds weight per plant were included in low criteria. The crossing combinations that had low estimation value of heterosis and heterobeltiosis of resistance to SMV infection were Yellow Bean x Taichung, Bean x Tanggamus and Tanggamus x B3570. Disease severity or resistance to SMV is influenced by genetic and environmental factors.

  7. Heterosis expression in crosses between maize populations: ear yield

    Directory of Open Access Journals (Sweden)

    Silva Ricardo Machado da

    2003-01-01

    Full Text Available The phenomenon of heterosis has been exploited extensively in maize (Zea mays L. breeding. The objective of this study was to evaluate the genetic potential of ten maize populations for ear yield following the diallel mating scheme. Six parental populations were obtained through phenotypic selection of open-pollinated ears in Rio Verde, GO, Brazil, (GO populations and four parental populations were synthesized in Piracicaba, SP, Brazil (GN populations: GO-D (DENTADO, GO- F (FLINT, GO-A (AMARELO, GO-B (BRANCO, GO-L (LONGO, GO-G (GROSSO, GN-01, GN-02, GN-03 and GN-04. Experiments were carried out in three environments: Anhembi (SP and Rio Verde (GO in 1998/99 (normal season crop and Piracicaba (SP in 1999 (off-season crop. All experiments were in completely randomized blocks with six replications. Analysis of variance grouped over environments showed high significance for heterosis and its components, although mid-parent heterosis and average heterosis were of low expression. The interaction treatments x environments was not significant. Total mid-parent heterosis effects ranged from de -4.3% to 17.3% with an average heterosis of 3.37%. Population with the highest yield (7.4 t ha-1 and with the highest effect of population (v i = 0.746 was GN-03, while the highest yielding cross was GO-B x GN-03 with 7,567 t ha-1. The highest specific heterosis effect (s ii' = 0.547 was observed in the cross GO-B x GN-03.

  8. Partial Dominance, Overdominance, Epistasis and QTL by Environment Interactions Contribute to Heterosis in Two Upland Cotton Hybrids.

    Science.gov (United States)

    Shang, Lianguang; Wang, Yumei; Cai, Shihu; Wang, Xiaocui; Li, Yuhua; Abduweli, Abdugheni; Hua, Jinping

    2015-12-29

    Based on two recombinant inbred line (RIL) populations, two corresponding backcross (BC) populations were constructed to elucidate the genetic basis of heterosis in Upland cotton (Gossypium hirsutum L.). The yield, and yield components, of these populations were evaluated in three environments. At the single-locus level, 78 and 66 quantitative trait loci (QTL) were detected using composite interval mapping in RIL and BC populations, respectively, and 29 QTL were identified based on mid-parental heterosis (MPH) data of two hybrids. Considering all traits together, a total of 50 (64.9%) QTL with partial dominance effect, and 27 (35.1%) QTL for overdominance effect were identified in two BC populations. At the two-locus level, 120 and 88 QTL with main effects (M-QTL), and 335 and 99 QTL involved in digenic interactions (E-QTL), were detected by inclusive composite interval mapping in RIL and BC populations, respectively. A large number of QTL by environment interactions (QEs) for M-QTL and E-QTL were detected in three environments. For most traits, average E-QTL explained a larger proportion of phenotypic variation than did M-QTL in two RIL populations and two BC populations. It was concluded that partial dominance, overdominance, epistasis, and QEs all contribute to heterosis in Upland cotton, and that partial dominance resulting from single loci and epistasis play a relatively more important role than other genetic effects in heterosis in Upland cotton. Copyright © 2016 Shang et al.

  9. Epistasis together with partial dominance, over-dominance and QTL by environment interactions contribute to yield heterosis in upland cotton.

    Science.gov (United States)

    Shang, Lianguang; Liang, Qingzhi; Wang, Yumei; Zhao, Yanpeng; Wang, Kunbo; Hua, Jinping

    2016-07-01

    QTL mapping based on backcross and RIL populations suggests that epistasis together with partial dominance, over-dominance and their environmental interactions of QTLs play an important role in yield heterosis in upland cotton. A backcross population (BC) was constructed to explore the genetic basis of heterosis in upland cotton (Gossypium hirsutum L.). For yield and yield components, recombinant inbred line (RIL) and BC populations were evaluated simultaneously at three different locations. A total of 35 and 30 quantitative trait loci (QTLs) were detected based on the RILs and BC data, respectively. Six (16.7 %) additive QTLs, 19 (52.8 %) partial dominant QTLs and 11 (30.6 %) over-dominant QTLs were detected by single-locus analysis using composite interval mapping in BC population. QTLs detected for mid-parent heterosis (MPH) were mostly related to those detected in the BC population. No significant correlation was found between marker heterozygosity and performance. It indicated that heterozygosity was not always favorable for performance. Two-locus analysis revealed 46, 25 and 12 QTLs with main effects (M-QTLs), and 55, 63 and 33 QTLs involved in digenic interactions (E-QTLs) were detected for yield and yield components in RIL, BC and MPH, respectively. A large number of M-QTLs and E-QTLs showed QTL by environment interactions (QEs) in three environments. These results suggest that epistasis together with partial dominance, over-dominance and QEs all contribute to yield heterosis in upland cotton.

  10. Genetic diversity for restriction fragment length polymorphisms and heterosis for two diallel sets of maize inbreds.

    Science.gov (United States)

    Melchinger, A E; Lee, M; Lamkey, K R; Hallauer, A R; Woodman, W L

    1990-10-01

    analyses, based on modified Rogers' distances, revealed associations among lines that were generally consistent with expectations based on known pedigree and on previous research. Correlations of RD and SRD with f1 performance, specific combining ability, and heterosis for yield and yield components, were generally positive, but too small to be of predictive value. In agreement with previous studies, our results suggest that RFLPs can be used to investigate relationships among maize inbreds, but that they are of limited usefulness for predicting the heterotic performance of single crosses between unrelated lines.

  11. Clonal forestry, heterosis and advanced-generation breeding

    Energy Technology Data Exchange (ETDEWEB)

    Tuskan, G.A.

    1997-08-01

    This report discusses the clonal planting stock offers many advantages to the forest products industry. Advanced-generation breeding strategies should be designed to maximize within-family variance and at the same time allow the capture of heterosis. Certainly there may be a conflict in the choice of breeding strategy based on the trait of interest. It may be that the majority of the traits express heterosis due to overdominance. Alternatively, disease resistance is expressed as the lack of a specific metabolite or infection court then the homozygous recessive genotype may be the most desirable. Nonetheless, as the forest products industry begins to utilize the economic advantages of clonal forestry, breeding strategies will have to be optimized for these commercial plant materials. Here, molecular markers can be used to characterize the nature of heterosis and therefore define the appropriate breeding strategy.

  12. Heterosis for flower and fruit traits in tomato (Lycopersicon ...

    African Journals Online (AJOL)

    ONOS

    2010-07-05

    Jul 5, 2010 ... heterosis; LSD, least significant difference; CV, co-variance. million hectares of with a total ... The North West Frontier Province of the country shared an area of .... Table 1. Mean squares for flowers per cluster, fruits per cluster, fruit length, fruit width, fruit weight and yield per plant of tomato during 2008.

  13. Elucidation of diversity among hybrids to examine heterosis and ...

    Indian Academy of Sciences (India)

    Ramesh K. Singh

    2018-03-06

    Mar 6, 2018 ... inheritance for horticultural traits and ToLCV resistance in tomato. RAMESH K. ... Therefore, the aim of this study was to see the diversity between the interspecific crosses and effect of heterosis, and inheritance for the morphological ...... indicated their similar genetic characters or dominant tax- onomical ...

  14. Combining Ability and Potential Heterosis in Ethiopian Mustard ...

    African Journals Online (AJOL)

    Standard heterosis of the crop parameters ranged from -8.22% for harvest index to 191.57% for number of pods per plant, while for seed yield per plant it ranged from -16.64 to 66.09%. Both additive and non additive gene actions were important in controlling days to 50% flowering, pod length, percent oil content, plant ...

  15. Magnitude of Exploitable Heterosis for Yield and Quality Traits of ...

    African Journals Online (AJOL)

    For coffee quality parameters, the effect of parents' leaf tip color on the magnitude of heterosis was observed to be more important than the parents' geographical origin. Five out of six hybrids having both parents green leaf tip color (Kaffa x Kaffa and Kaffa x Sidamo) exhibited SH of 1 to 16% for the overall coffee quality.

  16. 6186 Volume 12 No. 3 May 2012 HETEROSIS OF QUALITATIVE ...

    African Journals Online (AJOL)

    SHOHANA

    2012-05-03

    May 3, 2012 ... Heterosis or hybrid vigor can play a vital role in increasing the yield quality of pumpkin. It refers to the phenomenon in which F1 hybrid obtained by crossing of two genetically dissimilar inbred lines or genotypes, shows increased or decreased vigor over the better parent or mid parent value [10]. In cucurbits,.

  17. Production performance and exploitation of heterosis in Cameroon ...

    African Journals Online (AJOL)

    A crossbreeding experiment using Cameroon indigenous (CF) and German Dahlem Red (GR) chickens was undertaken to determine production performance and heterosis estimates of body weight of cockerels and laying hens at various ages and and egg production traits in layers. Four genetic groups were involved, ...

  18. Estimate of heterosis in early generations of tomato ( Solanum ...

    African Journals Online (AJOL)

    A study was conducted to estimate heterosis of six (6) tomato genotypes involving two parents at the experimental field of Horticulture division of CSIR - Crops Research Institute, Kumasi during the rainy season of 2014-2015. Analysis of variance showed significant differences among genotypes for all the traits revealing the ...

  19. The heritability theory of heterosis and its meaning for global agriculture.

    Science.gov (United States)

    Wu, Zhong-Xian

    2003-03-01

    This paper begins with the overthrow of the concept of combining ability in crossbreeding by the concept of heritability. The reason is that general combining ability changes with the number and kind of pure strains in the foundation stock and hence special combining ability changes also, so that work with different kinds of pure strains in the foundation stock cannot be compared. Hence combining ability is useless as a parameter to predict the amount of heterosis expected in the next generation. On the other hand, since each cross has a separate heritability, it can be applied to a cross population just as successfully as in purebreeding. Since the same concept holds in both cases, resort to any other concept would be superfluous. That's why combining ability must be rejected. Another reason (not given in the full text) is, an infinite number of pure strains would be required in the foundation stock for its results to be comparable with those of the heritability theory, which disposes of its utility altogether. The main content of the thesis is then the centennial enigma of heterosis can be resolved by Descarte's theoretic method of deduction. Accordingly we start from the definition of heterosis. [formula: see text] where H is heterosis, F1 is the first generation offspring, MP is the mean of the parents or midparent, and from the use of a binomial random variable and its extension to the multinomial case derive the basic relations of heterosis with its components. Starting with second degree statistics, we obtain [formula: see text] where V and cov stand for variance and covariance. The equations of heterosis are [formula: see text] where N is number of genes controlling a trait, a = (Pi - Pj)/2, d is deviation from midparent, while the variance components are all indicated by their names under the respective terms. It turns out that all these can be easily computed from the data so that the problem becomes a simple one which any college student may solve. In

  20. Effects of Heterosis and Direction of Crossing on Production ...

    African Journals Online (AJOL)

    The combined heterotic effects were negative for Hen Day Production (HDP), Feed efficiency (FEf), Age at Sexual Maturity (ASM), and mortality from day old to 21 weeks of age (-0.16, -4.33, -9.15 and -67.74% respectively). Positive but low heterosis was obtained for BWF (0.76), and EW (11.28) and WG, FEf, EN, ASM, HDP ...

  1. Heterosis performance in industrial and yield components of sweet corn

    OpenAIRE

    Assunção,Aracelle; Brasil,Edward Madureira; Oliveira,Jaison Pereira de; Reis,Américo José dos Santos; Pereira,André Ferreira; Bueno,Luíce Gomes; Ramos,Michelle Ribeiro

    2010-01-01

    Heterosis and its components were evaluated in a diallel crossing system of sweet corn. In the 38 treatments, eigth parents, 28 hybrids and two controls were used, arranged in a randomized block design with three replications.The diallel analysis followed the methodology of Gardner and Eberhart (1966). The following traits were evaluated: male and female flowering, plant and ear height, ear index (number of ears/number of plants), ºBrix, total ear weight, standard ear weight, industrial yield...

  2. Partial Dominance, Overdominance and Epistasis as the Genetic Basis of Heterosis in Upland Cotton (Gossypium hirsutum L.)

    Science.gov (United States)

    Wang, Yumei; Hua, Jinping

    2015-01-01

    Determination of genetic basis of heterosis may promote hybrid production in Upland cotton (Gossypium hirsutum L.). This study was designed to explore the genetic mechanism of heterosis for yield and yield components in F2: 3 and F2: 4 populations derived from a hybrid ‘Xinza No. 1’. Replicated yield field trials of the progenies were conducted in 2008 and 2009. Phenotypic data analyses indicated overdominance in F1 for yield and yield components. Additive and dominance effects at single-locus level and digenic epistatic interactions at two-locus level were analyzed by 421 marker loci spanning 3814 cM of the genome. A total of 38 and 49 QTLs controlling yield and yield components were identified in F2: 3 and F2: 4 populations, respectively. Analyses of these QTLs indicated that the effects of partial dominance and overdominance contributed to heterosis in Upland cotton simultaneously. Most of the QTLs showed partial dominance whereas 13 QTLs showing overdominance in F2:3 population, and 19 QTLs showed overdominance in F2:4. Among them, 21 QTLs were common in both F2: 3 and F2: 4 populations. A large number of two-locus interactions for yield and yield components were detected in both generations. AA (additive × additive) epistasis accounted for majority portion of epistatic effects. Thirty three complementary two-locus homozygotes (11/22 and 22/11) were the best genotypes for AA interactions in terms of bolls per plant. Genotypes of double homozygotes, 11/22, 22/11 and 22/22, performed best for AD/DA interactions, while genotype of 11/12 performed best for DD interactions. These results indicated that (1) partial dominance and overdominance effects at single-locus level and (2) epistasis at two-locus level elucidated the genetic basis of heterosis in Upland cotton. PMID:26618635

  3. Heterosis manifestations by survival and larval duration of F Bombyx mori L. Hybrids reared 1 with artificial diet

    Directory of Open Access Journals (Sweden)

    R. Guncheva

    2016-12-01

    Full Text Available Abstract. The aim of this paper was to study the influence of the degree of heterosis (compared to higher parent value- HP and mean parental values- MP on the signs, survival and duration of development in F hybrids of Bombyx mori L. from different geographical origin, fed by artificial diet. The study was conducted 1 at the Training Experimental Station of the Sericulture section of the Faculty of Agriculture at Trakia University. A total of 10 hybrids were tested featuring 6 breeds from the genetic bank of Sericulture and Agriculture Experiment Station (SAES-Vratsa. Silkworms were reared with artificial diet containing 15% powder of dried mulberry leaf produced at SAES-Vratsa and prepared by methods, developed by the manufacturer, whereby 250g of dry substance and 675ml of distilled water are homogenized using a mixer. The mixture is cured thermally in a microwave for 10min. at ~800W. The receptivity of specimens was -st determined based on the results from the survival and the duration in the I age of the larval stage. In heterogeneous crossbreds higher survival rate in the first age is exhibited by hybrids in which a Japanese type breed was used as dam. Homogeneous crossbreds created with the participation of Japanese breeds excel in both analyzed traits those involving a Chinese type. For the survival trait heterosis manifestations to higher parent value (HP and mean parental values (MP, were detected in the majority of hybrids (90.91%. Regarding the duration of development, heterosis effect to MP was observed in all F hybrids, 1 while to HP heterosis is exhibited by 60% of the tested F hybrids.

  4. Incomplete dominance of deleterious alleles contributes substantially to trait variation and heterosis in maize.

    Directory of Open Access Journals (Sweden)

    Jinliang Yang

    2017-09-01

    Full Text Available Deleterious alleles have long been proposed to play an important role in patterning phenotypic variation and are central to commonly held ideas explaining the hybrid vigor observed in the offspring of a cross between two inbred parents. We test these ideas using evolutionary measures of sequence conservation to ask whether incorporating information about putatively deleterious alleles can inform genomic selection (GS models and improve phenotypic prediction. We measured a number of agronomic traits in both the inbred parents and hybrids of an elite maize partial diallel population and re-sequenced the parents of the population. Inbred elite maize lines vary for more than 350,000 putatively deleterious sites, but show a lower burden of such sites than a comparable set of traditional landraces. Our modeling reveals widespread evidence for incomplete dominance at these loci, and supports theoretical models that more damaging variants are usually more recessive. We identify haplotype blocks using an identity-by-decent (IBD analysis and perform genomic prediction analyses in which we weigh blocks on the basis of complementation for segregating putatively deleterious variants. Cross-validation results show that incorporating sequence conservation in genomic selection improves prediction accuracy for grain yield and other fitness-related traits as well as heterosis for those traits. Our results provide empirical support for an important role for incomplete dominance of deleterious alleles in explaining heterosis and demonstrate the utility of incorporating functional annotation in phenotypic prediction and plant breeding.

  5. Incomplete dominance of deleterious alleles contributes substantially to trait variation and heterosis in maize.

    Science.gov (United States)

    Yang, Jinliang; Mezmouk, Sofiane; Baumgarten, Andy; Buckler, Edward S; Guill, Katherine E; McMullen, Michael D; Mumm, Rita H; Ross-Ibarra, Jeffrey

    2017-09-01

    Deleterious alleles have long been proposed to play an important role in patterning phenotypic variation and are central to commonly held ideas explaining the hybrid vigor observed in the offspring of a cross between two inbred parents. We test these ideas using evolutionary measures of sequence conservation to ask whether incorporating information about putatively deleterious alleles can inform genomic selection (GS) models and improve phenotypic prediction. We measured a number of agronomic traits in both the inbred parents and hybrids of an elite maize partial diallel population and re-sequenced the parents of the population. Inbred elite maize lines vary for more than 350,000 putatively deleterious sites, but show a lower burden of such sites than a comparable set of traditional landraces. Our modeling reveals widespread evidence for incomplete dominance at these loci, and supports theoretical models that more damaging variants are usually more recessive. We identify haplotype blocks using an identity-by-decent (IBD) analysis and perform genomic prediction analyses in which we weigh blocks on the basis of complementation for segregating putatively deleterious variants. Cross-validation results show that incorporating sequence conservation in genomic selection improves prediction accuracy for grain yield and other fitness-related traits as well as heterosis for those traits. Our results provide empirical support for an important role for incomplete dominance of deleterious alleles in explaining heterosis and demonstrate the utility of incorporating functional annotation in phenotypic prediction and plant breeding.

  6. Performance, carcass precentages and heterosis values, Alabio and Cihateup line and crossbreeding on eight week old

    Directory of Open Access Journals (Sweden)

    P.R. Matitaputty

    2011-06-01

    Full Text Available One effort for improving the productivity of Indonesian local ducks in particular as a meat types is by crossing among the local ducks. Crossbreeding is a fast breeding program for improving some commercial traits. Crossing between two lines or different breed are often used in production systems to utilized the advantage of heterosis (hybrid vigor. Crossbreeding is expected to produce new synthetic strains of duck that perform better than their parents. This study aims to utilize the heterosis and determine best cross, and to study the performance changes due to crossbreeding. The statistical design used in this study was a randomized complete design (RCD consisting of 4 treatments with 6 replications, each replication consisting of five ducks. The treatments used were the crossing of the pure Cihateup ♂ x Cihateup ♀ (CC, line Alabio ♂ x Alabio ♀ (AA, Alabio ♂ x Cihateup ♀ (AC cross as well as Cihateup ♂ x Alabio ♀ (CA cross. This study using male ducklings first hybrid (F1. The results show that the CA is better than AC in the final live weight (7.05%, weight gain (7.32%, carcass weight (9.24% and carcass yield (2.55%. Fleshy carcass cuts such as breast meat of AA (6.13% is better when compared to the others, but the highest percentage of meat percentage of the thigh is the AC (10.13%. Duck crossesing CA possess superior properties more and economic value compared with the duck AC.

  7. Comparative Transcriptome Analysis of Hot Pepper (Capsicum annuum L. Leaf Heterosis by RNA-seq

    Directory of Open Access Journals (Sweden)

    Tao Li

    2015-12-01

    Full Text Available Heterosis has been mostly used in hot pepper breeding and production, but the molecular basis of heterosis has not been extensively studied. In this study, comparative transcriptomes analysis of parental lines (D6, D7 and F1 hybrids (D6×D7 and D7×D6 was performed. A total of 0.6 billion raw reads, and 0.44 billion high-quality reads were obtained after the filtering process. Statistical analysis of genes with presence/deletion variations showed that, there were 1068 (6.20% and 780 (4.56% genes in the "single parent express consistent type" in the direct (D6×D7 and reciprocal (D7×D6 F1 hybrids, respectively. More genes fit into the non-additive expression type in two F1 hybrids compared to the parents, and less than 8% of the genes belong to the additive expression type. 66.08% in direct and 62.96% in reciprocal F1 hybrids belong to the epistatic dominance expression pattern. There were more differentially expressed genes (DEGs between the two parental lines (351 than between the two hybrids (17. The results of gene ontology (GO analysis showed that there were obvious differences in electron transmission and photorespiration between two F1 hybrids. GO terms for regulating plant hypersensitive responses, and MAPK pathways were only enriched in the direct hybrid (D6×D7.

  8. Comparative transcriptional profiling and preliminary study on heterosis mechanism of super-hybrid rice

    NARCIS (Netherlands)

    Song, G.S.; Zhai, H.L.; Peng, Y.G.; Zhang, L.; Wei, G.; Chen, X.Y.; Xiao, Y.G.; Wang, L.; Chen, Y.J.; Wu, B.; Chen, B.; Zhang, Y.; Chen, H.; Feng, X.J.; Gong, W.K.; Liu, Y.; Yin, Z.J.; Wang, F.; Liu, G.Z.; Xu, H.L.; Wei, X.L.; Zhao, X.L.; Ouwerkerk, P.B.F.; Hankemeier, T.; Reijmers, T.; Heijden, R. van der; Lu, C.M.; Wang, M.; Greef, J. van der; Zhu, Z.

    2010-01-01

    Heterosis is a biological phenomenon whereby the offspring from two parents show improved and superior performance than either inbred parental lines. Hybrid rice is one of the most successful apotheoses in crops utilizing heterosis. Transcriptional profiling of F1 super-hybrid rice Liangyou-2186 and

  9. Heterosis y aptitud combinatoria en pimenton (Capsicum allnuum L.

    Directory of Open Access Journals (Sweden)

    Echeverri A. Álvaro

    1998-12-01

    Full Text Available El objetivo del presente estudio fue estimar la heterosis, la aptitud combinatoria general (ACG y la aptitud combinatoria específica (ACE en un cruzamiento dialélico entre diez cultivares de pimentón usando las metodología propuesta por Griffing (1956b, método experimental 4, Modelo I (modificado por Hallauer y Miranda, 1988. Los parentales con valores más altos de heterosis relativa (HR y heterobelriosis (HB fueron LPUNAL (155,87% y 138,69%, Avelar (136,84% y 119,18%, y L363-46-672 (130,95% y 113,22%, los que participaron en la formación de cuatro de los diez cruzamientos más destacados por rendimiento. El análisis de varianza para aptitud combinatoria, mostró que en la transmisión y expresión de los caracteres evaluados, actúan en forma conjunta y altamente significativa tanto los efectos génicos aditivos (ACG como los 110 aditivos (A CE, pero con predominio de los primeros (Griffing, 1956. Los mayores valores de ACG para rendimiento fueron observados en LPUNAL-Palmira y Avelar (87.0 y 79.9, respectivamente.

  10. Static Analysis of Steel Fiber Concrete Beam With Heterosis Finite Elements

    Directory of Open Access Journals (Sweden)

    James H. Haido

    2014-08-01

    Full Text Available Steel fiber is considered as the most commonly used constructional fibers in concrete structures. The formulation of new nonlinearities to predict the static performance of steel fiber concrete composite structures is considered essential. Present study is devoted to investigate the efficiency of utilizing heterosis finite elements analysis in static analysis of steel fibrous beams. New and simple material nonlinearities are proposed and used in the formulation of these elements. A computer program coded in FORTRAN was developed to perform current finite element static analysis with considering four cases of elements stiffness matrix determination. The results are compared with the experimental data available in literature in terms of central deflections, strains, and failure form, good agreement was found. Suitable outcomes have been observed in present static analysis with using of tangential stiffness matrix and stiffness matrix in second iteration of the load increment.

  11. Estimation of Heterosis and Combining Ability in Petunia (Petunia hybrida Hort.

    Directory of Open Access Journals (Sweden)

    Hassan BAYAT

    2012-08-01

    Full Text Available Combining ability and heterosis were estimated for ornamental and vegetative traits of four petunia (Petunia hybrida Hort. inbred lines viz. L5 (P1, L8 (P2, L11 (P3 and L17 (P4 and their diallel hybrids in horticultural research farm of Ferdowsi University of Mashhad, Iran in 2011. The measured traits were plant height at first flower, number of leaf to first flower, flower diameter, flower tube length, internode length, stem diameter, plant height at flowering stage, plant spreading, number of branches per plant, leaf length and width. The results of combining ability for all studied traits revealed that both additive and non-additive gene effects contributed to the inheritance of the traits. Estimates of general combining ability effects showed that parent P3 was a good general combiner for most of the studied traits. For flower diameter, hybrid combination P1 � P2 had the highest significant positive specific combining ability effects. Reciprocal effects were significant for all traits and hybrid combination P1 � P2 had the highest significant positive reciprocal effects for flower tube length and plant height. Heterosis was found significant relative to both the mid parent and batter parent for all traits. For flower diameter, the highest positive values of heterotic effects were recorded in hybrid combination P2 � P3 both relative to the parental mean (37.3% and relative to the better parent (33.9%. It is obvious that heterotic effects represent an important resource in hybrid breeding of petunia.

  12. Estimation of Heterosis and Combining Ability in Petunia (Petunia hybrida Hort.

    Directory of Open Access Journals (Sweden)

    Hassan BAYAT

    2012-08-01

    Full Text Available Combining ability and heterosis were estimated for ornamental and vegetative traits of four petunia (Petunia hybrida Hort. inbred lines viz. L5 (P1, L8 (P2, L11 (P3 and L17 (P4 and their diallel hybrids in horticultural research farm of Ferdowsi University of Mashhad, Iran in 2011. The measured traits were plant height at first flower, number of leaf to first flower, flower diameter, flower tube length, internode length, stem diameter, plant height at flowering stage, plant spreading, number of branches per plant, leaf length and width. The results of combining ability for all studied traits revealed that both additive and non-additive gene effects contributed to the inheritance of the traits. Estimates of general combining ability effects showed that parent P3 was a good general combiner for most of the studied traits. For flower diameter, hybrid combination P1 P2 had the highest significant positive specific combining ability effects. Reciprocal effects were significant for all traits and hybrid combination P1 P2 had the highest significant positive reciprocal effects for flower tube length and plant height. Heterosis was found significant relative to both the mid parent and batter parent for all traits. For flower diameter, the highest positive values of heterotic effects were recorded in hybrid combination P2 P3 both relative to the parental mean (37.3% and relative to the better parent (33.9%. It is obvious that heterotic effects represent an important resource in hybrid breeding of petunia.

  13. Combining Ability And Heterosis For Some Quantitative Traits In Experimental Maize Hybrids

    Directory of Open Access Journals (Sweden)

    Abul Kalam Azad Mohammad

    2014-12-01

    Full Text Available In rabi season 2012, six diversed maize inbred lines were crossed in all possible combinations without reciprocals by using a half diallel mating design to obtain 15 single cross. Inbred parents and their F1 single crosses with a check were evaluated in rabi season 2013 to evaluate the role of general and specific combining ability and heterosis for some quantitative traits. Significant general combining ability variances was observed only for cob height and specific combining ability variances were observed for plant height, cob height, cob length, cob girth, number of kernels per cob, cob weight and hundred grain weight. The GCA/SCA ratio was less than unity for all studied traits except shelling percentage; this means that these traits are pre-dominantly controlled by non-additive gene action. Based on GCA estimates, it could be concluded that the best combiners were ML01, ML05 and ML29 inbred lines for most of the studied traits. This result indicated that these inbred lines could be considered as good combiners for improving these traits. Significant positive SCA effects were found for all studied traits except number of kernels per row and shelling percentage. Based on SCA effects, it could be concluded that the crosses ML01×ML02, ML02×ML05, ML02×ML29 and ML05×ML15 could be exploited by the maize breeders to increase maize yield. Three F1 hybrids such as ML02×ML15, ML02×ML29 and ML05×ML15 proved to be the outstanding hybrids to immediate further steps for commercial cultivation. In a conclusive decision the F1 hybrid, ML02×ML29 was the best combination as evaluated through combining ability and standard heterosis.

  14. Temporal Shift of Circadian-Mediated Gene Expression and Carbon Fixation Contributes to Biomass Heterosis in Maize Hybrids.

    Directory of Open Access Journals (Sweden)

    Dae Kwan Ko

    2016-07-01

    Full Text Available Heterosis has been widely used in agriculture, but the molecular mechanism for this remains largely elusive. In Arabidopsis hybrids and allopolyploids, increased photosynthetic and metabolic activities are linked to altered expression of circadian clock regulators, including CIRCADIAN CLOCK ASSOCIATED1 (CCA1. It is unknown whether a similar mechanism mediates heterosis in maize hybrids. Here we report that higher levels of carbon fixation and starch accumulation in the maize hybrids are associated with altered temporal gene expression. Two maize CCA1 homologs, ZmCCA1a and ZmCCA1b, are diurnally up-regulated in the hybrids. Expressing ZmCCA1 complements the cca1 mutant phenotype in Arabidopsis, and overexpressing ZmCCA1b disrupts circadian rhythms and biomass heterosis. Furthermore, overexpressing ZmCCA1b in maize reduced chlorophyll content and plant height. Reduced height stems from reduced node elongation but not total node number in both greenhouse and field conditions. Phenotypes are less severe in the field than in the greenhouse, suggesting that enhanced light and/or metabolic activities in the field can compensate for altered circadian regulation in growth vigor. Chromatin immunoprecipitation-sequencing (ChIP-seq analysis reveals a temporal shift of ZmCCA1-binding targets to the early morning in the hybrids, suggesting that activation of morning-phased genes in the hybrids promotes photosynthesis and growth vigor. This temporal shift of ZmCCA1-binding targets correlated with nonadditive and additive gene expression in early and late stages of seedling development. These results could guide breeding better hybrid crops to meet the growing demand in food and bioenergy.

  15. Temporal Shift of Circadian-Mediated Gene Expression and Carbon Fixation Contributes to Biomass Heterosis in Maize Hybrids.

    Science.gov (United States)

    Ko, Dae Kwan; Rohozinski, Dominica; Song, Qingxin; Taylor, Samuel H; Juenger, Thomas E; Harmon, Frank G; Chen, Z Jeffrey

    2016-07-01

    Heterosis has been widely used in agriculture, but the molecular mechanism for this remains largely elusive. In Arabidopsis hybrids and allopolyploids, increased photosynthetic and metabolic activities are linked to altered expression of circadian clock regulators, including CIRCADIAN CLOCK ASSOCIATED1 (CCA1). It is unknown whether a similar mechanism mediates heterosis in maize hybrids. Here we report that higher levels of carbon fixation and starch accumulation in the maize hybrids are associated with altered temporal gene expression. Two maize CCA1 homologs, ZmCCA1a and ZmCCA1b, are diurnally up-regulated in the hybrids. Expressing ZmCCA1 complements the cca1 mutant phenotype in Arabidopsis, and overexpressing ZmCCA1b disrupts circadian rhythms and biomass heterosis. Furthermore, overexpressing ZmCCA1b in maize reduced chlorophyll content and plant height. Reduced height stems from reduced node elongation but not total node number in both greenhouse and field conditions. Phenotypes are less severe in the field than in the greenhouse, suggesting that enhanced light and/or metabolic activities in the field can compensate for altered circadian regulation in growth vigor. Chromatin immunoprecipitation-sequencing (ChIP-seq) analysis reveals a temporal shift of ZmCCA1-binding targets to the early morning in the hybrids, suggesting that activation of morning-phased genes in the hybrids promotes photosynthesis and growth vigor. This temporal shift of ZmCCA1-binding targets correlated with nonadditive and additive gene expression in early and late stages of seedling development. These results could guide breeding better hybrid crops to meet the growing demand in food and bioenergy.

  16. Heterosis and heterotic patterns among maize landraces for forage

    Directory of Open Access Journals (Sweden)

    Lopez Cesar Gabriel

    2009-01-01

    Full Text Available Corn silage is a high-quality forage crop used in many areas of the world. Although vegetative and reproductivecomponents of the plant must be considered, breeding programs in temperate regions are mainly based on the Reid xLancaster heterotic pattern that has undergone several cycles of improvement for grain yield. Moreover, hybrids selected forforage production are early maturing genotypes not adapted to warm-temperate or subtropical areas. Consequently, exoticgermplasm should be considered as a source of materials for breeding programs. Eight landraces were crossed following adiallel mating design. Interpopulation crosses showed high heterosis for ear, stover, and whole plant dry matter yield (EY, SY,and WY, respectively. On average, crosses had higher SY than checks, but lower EY. Considering WY, two interpopulationcrosses had higher means than all commercial checks, indicating the potential of the germplasm evaluated. Two compositeswere selected and different breeding strategies are discussed.

  17. Combining ability and heterosis in diallel crosses of maize.

    Science.gov (United States)

    Dhillon, B S; Singh, J

    1977-05-01

    The present investigation involved crosses among 20 elite yellow maize populations. These were evaluated in four environments in a randomized block design with four replications in each environment. Variety Cuba was observed to be the best general combiner for grain yield, followed by St Croix and Prolific. No clear association could be discerned between general combining ability (GCA) effects for grain yield and its components, and mean grain yield performance and GCA effects. Heterosis was observed in general and all the crosses involving Cuba yielded better than the midparent. The five hybrids, Kisan × Cuba, Antigua 3D × St Croix, Prolific × St Croix, Vijay × Antigua Gr. I and A 23 × Cuba, yielded more than the standard check. Significant yield superiority of these varietal hybrids over the best commercial composite (Jawahar) suggested the possibility of their commercial exploitation.

  18. Prediction of heterosis using genome-wide SNP-marker data: application to egg production traits in white Leghorn crosses.

    Science.gov (United States)

    Amuzu-Aweh, E N; Bijma, P; Kinghorn, B P; Vereijken, A; Visscher, J; van Arendonk, J Am; Bovenhuis, H

    2013-12-01

    Prediction of heterosis has a long history with mixed success, partly due to low numbers of genetic markers and/or small data sets. We investigated the prediction of heterosis for egg number, egg weight and survival days in domestic white Leghorns, using ∼400 000 individuals from 47 crosses and allele frequencies on ∼53 000 genome-wide single nucleotide polymorphisms (SNPs). When heterosis is due to dominance, and dominance effects are independent of allele frequencies, heterosis is proportional to the squared difference in allele frequency (SDAF) between parental pure lines (not necessarily homozygous). Under these assumptions, a linear model including regression on SDAF partitions crossbred phenotypes into pure-line values and heterosis, even without pure-line phenotypes. We therefore used models where phenotypes of crossbreds were regressed on the SDAF between parental lines. Accuracy of prediction was determined using leave-one-out cross-validation. SDAF predicted heterosis for egg number and weight with an accuracy of ∼0.5, but did not predict heterosis for survival days. Heterosis predictions allowed preselection of pure lines before field-testing, saving ∼50% of field-testing cost with only 4% loss in heterosis. Accuracies from cross-validation were lower than from the model-fit, suggesting that accuracies previously reported in literature are overestimated. Cross-validation also indicated that dominance cannot fully explain heterosis. Nevertheless, the dominance model had considerable accuracy, clearly greater than that of a general/specific combining ability model. This work also showed that heterosis can be modelled even when pure-line phenotypes are unavailable. We concluded that SDAF is a useful predictor of heterosis in commercial layer breeding.

  19. Combining ability and heterosis for some agronomic traits in crosses of maize.

    Science.gov (United States)

    Abdel-Moneam, M A; Attia, A N; El-Emery, M I; Fayed, E A

    2009-03-01

    In 2007, five maize inbred lines were crossed in all possible combinations without reciprocals by using a half diallel crosses mating design to obtain 10 single cross. Inbred parents and their F1 single crosses were evaluated through 2008 season to evaluate the role of general and specific combining ability and heterosis for some agronomic traits. Results indicated that mean squares of genotypes were highly significant for all studied traits, i.e., ear diameter, ear length, number of kernels/row, 100-kernel weight, ear yield per plant, grain yield per plant and shelling percentage. General Combining Ability (GCA) and Specific Combining Ability (SCA) mean squares were highly significant for all studied traits. The GCA/SCA ratio was less than unity for all studied traits; this means that these traits are predominantly controlled by non-additive gene action. Significant positive GCA effects were found for all studied traits. Based on GCA estimates, it could be concluded that the best combiners were Rg5 and Rg8 inbred lines for most of studied traits. This result indicated that these inbred lines could be considered as good combiners for improving these traits. Significant positive SCA effects were found for all studied traits. Based on SCA effects, it could be concluded that the best crosses for ear diameter and 100-kernels weigh was G507AxG516; for ear length was G516xRg8; for kernels number/row was G516xG278; for ear yield/plant, grain yield/plant and Shelling percentage was G278xRg5. These crosses could be selected and used in breeding programs for improving these traits. Results showed positive significant heterosis values for all studied traits. The best crosses over both their mid-parents and better-parents for ear diameter and 100-kernel weigh was G507AxG516; for ear length and kernels number/row was G516xG278; for ear yield/plant and grain yield/plant was G278xRg8 and for Shelling percentage was G278xRg5.

  20. Main Effect QTL with Dominance Determines Heterosis for Dynamic Plant Height in Upland Cotton.

    Science.gov (United States)

    Shang, Lianguang; Ma, Lingling; Wang, Yumei; Su, Ying; Wang, Xiaocui; Li, Yuhua; Abduweli, Abdugheni; Cai, Shihu; Liu, Fang; Wang, Kunbo; Hua, Jinping

    2016-10-13

    Plant height, which shows dynamic development and heterosis, is a major trait affecting plant architecture and has an indirect influence on economic yield related to biological yield in cotton. In the present study, we carried out dynamic analysis for plant height and its heterosis by quantitative trait loci (QTL) mapping at multiple developmental stages using two recombinant inbred lines (RILs) and their backcross progeny. At the single-locus level, 47 QTL were identified at five developmental stages in two hybrids. In backcross populations, QTL identified at an early stage mainly showed partial effects and QTL detected at a later stage mostly displayed overdominance effects. At the two-locus level, we found that main effect QTL played a more important role than epistatic QTL in the expression of heterosis in backcross populations. Therefore, this study implies that the genetic basis of plant height heterosis shows dynamic character and main effect QTL with dominance determines heterosis for plant height in Upland cotton. Copyright © 2016 Shang et al.

  1. Comparative transcriptional profiling and preliminary study on heterosis mechanism of super-hybrid rice.

    Science.gov (United States)

    Song, Gui-Sheng; Zhai, Hong-Li; Peng, Yong-Gang; Zhang, Lei; Wei, Gang; Chen, Xiao-Ying; Xiao, Yu-Guo; Wang, Lili; Chen, Yue-Jun; Wu, Bin; Chen, Bin; Zhang, Yu; Chen, Hua; Feng, Xiu-Jing; Gong, Wan-Kui; Liu, Yao; Yin, Zhi-Jie; Wang, Feng; Liu, Guo-Zhen; Xu, Hong-Lin; Wei, Xiao-Li; Zhao, Xiao-Ling; Ouwerkerk, Pieter B F; Hankemeier, Thomas; Reijmers, Theo; van der Heijden, Rob; Lu, Cong-Ming; Wang, Mei; van der Greef, Jan; Zhu, Zhen

    2010-11-01

    Heterosis is a biological phenomenon whereby the offspring from two parents show improved and superior performance than either inbred parental lines. Hybrid rice is one of the most successful apotheoses in crops utilizing heterosis. Transcriptional profiling of F(1) super-hybrid rice Liangyou-2186 and its parents by serial analysis of gene expression (SAGE) revealed 1183 differentially expressed genes (DGs), among which DGs were found significantly enriched in pathways such as photosynthesis and carbon-fixation, and most of the key genes involved in the carbon-fixation pathway exhibited up-regulated expression in F(1) hybrid rice. Moreover, increased catabolic activity of corresponding enzymes and photosynthetic efficiency were also detected, which combined to indicate that carbon fixation is enhanced in F(1) hybrid, and might probably be associated with the yield vigor and heterosis in super-hybrid rice. By correlating DGs with yield-related quantitative trait loci (QTL), a potential relationship between differential gene expression and phenotypic changes was also found. In addition, a regulatory network involving circadian-rhythms and light signaling pathways was also found, as previously reported in Arabidopsis, which suggest that such a network might also be related with heterosis in hybrid rice. Altogether, the present study provides another view for understanding the molecular mechanism underlying heterosis in rice.

  2. Heterosis and combining ability analysis of eight agronomic characters in five distinctive wheat mutants

    International Nuclear Information System (INIS)

    Hou Guangyun; Jing Liling

    1996-01-01

    A complete delia cross (no reciprocal hybrid) was made using 5 wheat mutants with distinctive characters. The heterosis and combining ability of 8 agronomic characters were studied in 10 crosses F 1 and 5 parents. The dominance degree of F 1 indicated that except for the remarkable negative heterosis for heading-date, the positive heterosis was remarkable for all the other 7 characters. The performance of parents was significantly related to the gca effects. However, gca effects were not completely consistent with the value of heterosis. As germplasm resources, dwarf-stalk mutant 890376 was the best for reducing plant height. A large grain mutant, Hesheng 2, was the best for increasing 1000-grain weight. An early maturity mutant 890236 was the best for earlier heading and fillering ability. A large head mutant 890018 was the best for improving head length, number of spikelets per head, number of grain per head and grain weight per head. To sum up, the above 4 distinctive mutants were very useful for improving the characters corresponding with their mutated characters. For some characters, the cross will have a bigger sca effects if its parents have a bigger gca effects. However, it is not the same for all their characters. Sca effects of crosses were significantly related to the heterosis over mean parent

  3. Main Effect QTL with Dominance Determines Heterosis for Dynamic Plant Height in Upland Cotton

    Directory of Open Access Journals (Sweden)

    Lianguang Shang

    2016-10-01

    Full Text Available Plant height, which shows dynamic development and heterosis, is a major trait affecting plant architecture and has an indirect influence on economic yield related to biological yield in cotton. In the present study, we carried out dynamic analysis for plant height and its heterosis by quantitative trait loci (QTL mapping at multiple developmental stages using two recombinant inbred lines (RILs and their backcross progeny. At the single-locus level, 47 QTL were identified at five developmental stages in two hybrids. In backcross populations, QTL identified at an early stage mainly showed partial effects and QTL detected at a later stage mostly displayed overdominance effects. At the two-locus level, we found that main effect QTL played a more important role than epistatic QTL in the expression of heterosis in backcross populations. Therefore, this study implies that the genetic basis of plant height heterosis shows dynamic character and main effect QTL with dominance determines heterosis for plant height in Upland cotton.

  4. Nature and magnitude of genetic variability, heterosis and inbreeding depression in Amaranthus

    Directory of Open Access Journals (Sweden)

    Pandey R.M.

    2007-01-01

    Full Text Available Combining ability, heterosis and inbreeding depression were estimated in grain amaranths for ten characters. Non-additive genetic variance was predominant for majority of characters in both F1 and F2 generations. The parent AG-21 was good general combiner for yield/plant also showed high GCA effects for panicles/plant and harvest index in both F1 and F2 generations. Seven characters, the best F2s on the basis of SCA involves one parent with high GCA effect and the other with poor or average GCA effects. The hybrids which exhibited highest heterosis also showed high inbreeding depression. Heterosis over better parent was highest for economic grain yield (145.047%, followed by panicles/plant (113.675%, panicle length (33.656% and grain weight/panicle (23.566%.

  5. Heterosis and combining ability of drought-tolerant maize lines for ...

    African Journals Online (AJOL)

    In this study, eight drought tolerant lines and their diallel crosses were tested separately in randomized complete block design under normal and high plant densities that combined with well watered and drought stress to estimate performance, heterosis and combining ability for grain yield. Both types of genotypes gave ...

  6. Relationship Between Differential Gene Expression and Heterosis During Ear Development in Maize (Zea mays L.).

    Science.gov (United States)

    Wang, Xinjun; Cao, Haihe; Zhang, Dengfeng; Li, Bo; He, Yan; Li, Jiansheng; Wang, Shoucai

    2007-02-01

    Maize (Zea mays L.) is one of the most important crops because of the remarkable properties of its hybrid, which is responsible for the high commercial value of hybrid maize. The genetic basis of heterosis (hybrid vigor) is not well understood. A differential display technique was performed to identify genes with differential expression across twelve maize inbred lines and thirty-three hybrids during ear development. An incomplete diallel design was used to investigate the relationship between the global framework of differential gene expression and heterosis. It was found that the genes belonging to MONO pattern (i.e., genes expressed in both parental lines and in hybrid) was the highest in percentage among the total five patterns and illustrated that the properties of differentially expressed genes are not entirely responsible for heterosis. Furthermore, a larger number of differentially expressed genes in hybrid, which serves as a major reservoir for generating novel phenotypes that exhibit heterosis of certain agronomic traits during early development and differentiation of maize ear. Moreover, there were some silent genesin hybrids that are responsible for the arrest or abortion of spikelets and for the increase in kernels weight.

  7. Negative heterosis not apparent in 22-year-old hybrids of Picea mariana and Picea rubens

    Science.gov (United States)

    Kurt H. Johnsen; John E. Major; Judy Loo; Donald McPhee

    1998-01-01

    Abstract: Work from the 1970s indicated that, relative to either parent species, crosses between red spruce (Picea rubens Sarg.) and black spruce (Picea mariana (Mill.) B.S.P.) were inferior with respect to both growth and photosynthesis. We re-examined the hypothesis that there is negative heterosis in hybrids...

  8. Heterosis and heterobeltiotic studies of F1 hybirds in brassica carinata

    International Nuclear Information System (INIS)

    Nausheen; Farhatullah; Hussain, I.; Khalil, I.; Amanullah

    2015-01-01

    An experiment was carried out at the University of Agriculture, Peshawar during 2012-13 using a set of F /sub 1/ hybrids of B. carinata for estimating heterosis and heterobeltiosis for important yield and quality parameters. The experimental material comprised of six B. carinata parental genotypes viz. C-88, C-89, C-90, C-93, C-95, C-97 and their 30 F /sub 1/ hybrids as direct crosses. A randomized complete block design with two replicates was used for field evaluation of 36 B. carinata genotypes (6 parental lines and 30 F /sub 1/ hybrids). Significant genetic variation was observed for primary branches plant /sup 1/, main raceme length, seed yield plant /sup 1/, oil and protein content among parents as well as F /sub 1/ hybrids. The highest heterosis and heterobeltiosis for primary branches (24.25 vs. 12.30 percentage) and main raceme length (37.31 vs. 22.93 percentage) was recorded for F /sub 1/ hybrids C-88 * C-93 and C-89 * C-97, respectively. Hybrid C-93 * C-90 had the highest positive heterosis for seed yield plant /sup 1/ (23.33 percentage). For protein content, the maximum heterosis was recorded for hybrid C-88 * C-89 (11.34 percentage). Similarly, F /sub 1/ hybrid C-88 * C-97 showed maximum heterosis for oil content (14.41 percentage). The highest heterobeltiosis was exhibited by hybrids C-90 * C-97 for seed yield (9.53 percentage) , C-89 * C-90 for oil content (7.61 percentage) and C-93 * C-97 for protein content (4.11 percentage). Based on high mean performance and heterotic values, aforemntioned hybrids and their corresponding parental lines will be exploited further for commercial hybrid production. (author)

  9. Long-term genomic selection for heterosis without dominance in multiplicative traits: case study of bunch production in oil palm.

    Science.gov (United States)

    Cros, David; Denis, Marie; Bouvet, Jean-Marc; Sánchez, Leopoldo

    2015-08-29

    To study the potential of genomic selection for heterosis resulting from multiplicative interactions between additive and antagonistic components, we focused on oil palm, where bunch production is the product of bunch weight and bunch number. We simulated two realistic breeding populations and compared current reciprocal recurrent selection (RRS) with reciprocal recurrent genomic selection (RRGS) over four generations. All breeding strategies aimed at selecting the best individuals in parental populations to increase bunch production in hybrids. For RRGS, we obtained the parental genomic estimated breeding values using GBLUP with hybrid phenotypes as data records and population specific allele models. We studied the effects of four RRGS parameters on selection response and genetic parameters: (1) the molecular data used to calibrate the GS model: in RRGS_PAR, we used parental genotypes and in RRGS_HYB we also used hybrid genotypes; (2) frequency of progeny tests (model calibration); (3) number of candidates and (4) number of genotyped hybrids in RRGS_HYB. We concluded that RRGS could increase the annual selection response compared to RRS by decreasing the generation interval and by increasing the selection intensity. With 1700 genotyped hybrids, calibration every four generations and 300 candidates per generation and population, selection response of RRGS_HYB was 71.8 % higher than RRS. RRGS_PAR with calibration every two generations and 300 candidates was a relevant alternative, as a good compromise between the annual response, risk around the expected response, increased inbreeding and cost. RRGS required inbreeding management because of a higher annual increase in inbreeding than RRS. RRGS appeared as a valuable method to achieve a long-term increase in the performance for a trait showing heterosis due to the multiplicative interaction between additive and negatively correlated components, such as oil palm bunch production.

  10. Heterosis Increases Fertility, Fecundity, and Survival of Laboratory-Produced F1 Hybrid Males of the Malaria Mosquito Anopheles coluzzii.

    Science.gov (United States)

    Ekechukwu, Nkiru E; Baeshen, Rowida; Traorè, Sékou F; Coulibaly, Mamadou; Diabate, Abdoulaye; Catteruccia, Flaminia; Tripet, Frédéric

    2015-10-23

    The success of vector control strategies aiming to decrease disease transmission via the release of sterile or genetically-modified male mosquitoes critically depends on mating between laboratory-reared males and wild females. Unfortunately, mosquito colonization, laboratory rearing, and genetic manipulations can all negatively affect male competitiveness. Heterosis is commonly used to produce domestic animals with enhanced vigor and homogenous genetic background and could therefore potentially improve the mating performance of mass-reared male mosquitoes. Here, we produced enhanced hybrid males of the malaria mosquito Anopheles coluzzii by crossing two strains colonized >35 and 8 years ago. We compared the amount of sperm and mating plug proteins they transferred to females, as well as their insemination rate, reproductive success and longevity under various experimental conditions. Across experiments, widespread adaptations to laboratory mating were detected in the older strain. In large-group mating experiments, no overall hybrid advantage in insemination rates and the amount of sperm and accessory gland proteins transferred to females was detected. Despite higher sperm activity, hybrid males did not appear more fecund. However, individual-male mating and laboratory-swarm experiments revealed that hybrid males, while inseminating fewer females than older inbred males, were significantly more fertile, producing larger mating plugs and drastically increasing female fecundity. Heterotic males also showed increased longevity. These results validate the use of heterosis for creating hybrid males with improved fitness from long-established inbred laboratory strains. Therefore, this simple approach could facilitate disease control strategies based on male mosquito releases with important ultimate benefits to human health. Copyright © 2015 Ekechukwu et al.

  11. The thermodynamics of protein aggregation reactions may underpin the enhanced metabolic efficiency associated with heterosis, some balancing selection, and the evolution of ploidy levels.

    Science.gov (United States)

    Ginn, B R

    2017-07-01

    Identifying the physical basis of heterosis (or "hybrid vigor") has remained elusive despite over a hundred years of research on the subject. The three main theories of heterosis are dominance theory, overdominance theory, and epistasis theory. Kacser and Burns (1981) identified the molecular basis of dominance, which has greatly enhanced our understanding of its importance to heterosis. This paper aims to explain how overdominance, and some features of epistasis, can similarly emerge from the molecular dynamics of proteins. Possessing multiple alleles at a gene locus results in the synthesis of different allozymes at reduced concentrations. This in turn reduces the rate at which each allozyme forms soluble oligomers, which are toxic and must be degraded, because allozymes co-aggregate at low efficiencies. The model developed in this paper can explain how heterozygosity impacts the metabolic efficiency of an organism. It can also explain why the viabilities of some inbred lines seem to decline rapidly at high inbreeding coefficients (F > 0.5), which may provide a physical basis for truncation selection for heterozygosity. Finally, the model has implications for the ploidy level of organisms. It can explain why polyploids are frequently found in environments where severe physical stresses promote the formation of soluble oligomers. The model can also explain why complex organisms, which need to synthesize aggregation-prone proteins that contain intrinsically unstructured regions (IURs) and multiple domains because they facilitate complex protein interaction networks (PINs), tend to be diploid while haploidy tends to be restricted to relatively simple organisms. Copyright © 2017 Elsevier Ltd. All rights reserved.

  12. Genomics-Assisted Exploitation of Heterosis in Perennial Ryegrass (Lolium perenne L.)

    DEFF Research Database (Denmark)

    Islam, Md. Shofiqul

    ryegrass for the development of improved varieties. During his PhD studies, Mohammad Shofiqul Islam studied the feasibility of developing novel hybrid breeding schemes based on cytoplasmic male sterility (CMS) systems in perennial ryegrass. He successfully completed the assembly and annotation of a male......-fertile perennial ryegrass mitochondrial genome, and identified candidate genes responsible for the CMS phenotype by comparing male-fertile and male-sterile mitochondrial genomes. His findings constitute a good basis for continuing research to produce hybrid grass varieties to address the future needs......, breeding activities have been carried out to improve the population and develop synthetic varieties. This does not fully exploit the potential of heterosis, however. Hybrid breeding is an alternative strategy and provides opportunities to fully exploit the genetically available heterosis in perennial...

  13. Heterosis in okra hybrids obtained by hybridization of two methods: traditional and experimental

    OpenAIRE

    Maciel, Gabriel M; Luz, José MQ; Campos, Saulo FB; Finzi, Rafael R; Azevedo, Breno NR

    2017-01-01

    ABSTRACT High heterosis values can be obtained using hybrid okra seeds. However, despite high heterotic values, it is very difficult to produce hybrid okra seeds. The objective of this study was to evaluate an experimental methodology of hybridization. Two different methods of hybridization were used: traditional manual hybridization with complete emasculation followed by hand pollination (artificial) and, an experimental methodology, performing manual hybridization with incomplete emasculati...

  14. Heterosis among populations of maize (Zea mays L.) with different levels of exotic germplasm.

    Science.gov (United States)

    Crossa, J; Gardner, C O; Mumm, R F

    1987-01-01

    Thirteen maize (Zea mays L.) populations including five adapted, five adapted x exotic, two composites of adapted and exotic, and one exotic selected for adaptability were crossed in a diallel mating system. The parents and 78 crosses and nine check hybrids were evaluated for grain yield and plant height in five environments. The Gardner-Eberhart model Analysis II indicated that additive and nonadditive gene effects accounted for 60 and 40% of the total variation among populations, respectively, for grain yield and 86% and 14% of the total variation, respectively, for plant height. Components of heterosis were significant in the combined analysis for both traits. Adapted Corn Belt populations tended to have higher performance in crosses and greater values of variety heterosis than 50% adapted populations. 'Nebraska Elite Composite', 'Corn Belt' x 'Mexican', and 'Corn Belt' x 'Brazilian' showed high mean yields in crosses, however, they were not among those with high estimates of variety heterosis. One exotic population ('Tuxpeno' x 'Antigua Grupo 2') and three adapted populations ['307 Composite', 'NB(S1)C-3', and 'NK(S1)C-3'] might be combined together to form a high-yielding population. It may be possible to synthesize two useful populations for reciprocal recurrent selection by grouping 'Tuxpeno' x 'Antiqua Grupo 2', 'NB(S1)C-3', and 'NS(FS)LFW-8' into one population and 'NK(S1)C-3', 'Krug'x'Tabloncillo', and '307 Composite' in the other one.

  15. Identification of candidate genes associated with positive and negative heterosis in rice.

    Science.gov (United States)

    Venu, R C; Ma, Jianbing; Jia, Yulin; Liu, Guangjie; Jia, Melissa H; Nobuta, Kan; Sreerekha, M V; Moldenhauer, Karen; McClung, Anna M; Meyers, Blake C; Wang, Guo-Liang

    2014-01-01

    To identify the genes responsible for yield related traits, and heterosis, massively parallel signature sequencing (MPSS) libraries were constructed from leaves, roots and meristem tissues from the two parents, 'Nipponbare' and '93-11', and their F1 hybrid. From the MPSS libraries, 1-3 million signatures were obtained. Using cluster analysis, commonly and specifically expressed genes in the parents and their F1 hybrid were identified. To understand heterosis in the F1 hybrid, the differentially expressed genes in the F1 hybrid were mapped to yield related quantitative trait loci (QTL) regions using a linkage map constructed from 131 polymorphic simple sequence repeat markers with 266 recombinant inbred lines derived from a cross between Nipponbare and 93-11. QTLs were identified for yield related traits including days to heading, plant height, plant type, number of tillers, main panicle length, number of primary branches per main panicle, number of kernels per main panicle, total kernel weight per main panicle, 1000 grain weight and total grain yield per plant. Seventy one QTLs for these traits were mapped, of which 3 QTLs were novel. Many highly expressed chromatin-related genes in the F1 hybrid encoding histone demethylases, histone deacetylases, argonaute-like proteins and polycomb proteins were located in these yield QTL regions. A total of 336 highly expressed transcription factor (TF) genes belonging to 50 TF families were identified in the yield QTL intervals. These findings provide the starting genomic materials to elucidate the molecular basis of yield related traits and heterosis in rice.

  16. Identification of candidate genes associated with positive and negative heterosis in rice.

    Directory of Open Access Journals (Sweden)

    R C Venu

    Full Text Available To identify the genes responsible for yield related traits, and heterosis, massively parallel signature sequencing (MPSS libraries were constructed from leaves, roots and meristem tissues from the two parents, 'Nipponbare' and '93-11', and their F1 hybrid. From the MPSS libraries, 1-3 million signatures were obtained. Using cluster analysis, commonly and specifically expressed genes in the parents and their F1 hybrid were identified. To understand heterosis in the F1 hybrid, the differentially expressed genes in the F1 hybrid were mapped to yield related quantitative trait loci (QTL regions using a linkage map constructed from 131 polymorphic simple sequence repeat markers with 266 recombinant inbred lines derived from a cross between Nipponbare and 93-11. QTLs were identified for yield related traits including days to heading, plant height, plant type, number of tillers, main panicle length, number of primary branches per main panicle, number of kernels per main panicle, total kernel weight per main panicle, 1000 grain weight and total grain yield per plant. Seventy one QTLs for these traits were mapped, of which 3 QTLs were novel. Many highly expressed chromatin-related genes in the F1 hybrid encoding histone demethylases, histone deacetylases, argonaute-like proteins and polycomb proteins were located in these yield QTL regions. A total of 336 highly expressed transcription factor (TF genes belonging to 50 TF families were identified in the yield QTL intervals. These findings provide the starting genomic materials to elucidate the molecular basis of yield related traits and heterosis in rice.

  17. Identification of Candidate Genes Associated with Positive and Negative Heterosis in Rice

    Science.gov (United States)

    Venu, R. C.; Ma, Jianbing; Jia, Yulin; Liu, Guangjie; Jia, Melissa H.; Nobuta, Kan; Sreerekha, M. V.; Moldenhauer, Karen; McClung, Anna M.; Meyers, Blake C.; Wang, Guo-Liang

    2014-01-01

    To identify the genes responsible for yield related traits, and heterosis, massively parallel signature sequencing (MPSS) libraries were constructed from leaves, roots and meristem tissues from the two parents, ‘Nipponbare’ and ‘93-11’, and their F1 hybrid. From the MPSS libraries, 1–3 million signatures were obtained. Using cluster analysis, commonly and specifically expressed genes in the parents and their F1 hybrid were identified. To understand heterosis in the F1 hybrid, the differentially expressed genes in the F1 hybrid were mapped to yield related quantitative trait loci (QTL) regions using a linkage map constructed from 131 polymorphic simple sequence repeat markers with 266 recombinant inbred lines derived from a cross between Nipponbare and 93-11. QTLs were identified for yield related traits including days to heading, plant height, plant type, number of tillers, main panicle length, number of primary branches per main panicle, number of kernels per main panicle, total kernel weight per main panicle, 1000 grain weight and total grain yield per plant. Seventy one QTLs for these traits were mapped, of which 3 QTLs were novel. Many highly expressed chromatin-related genes in the F1 hybrid encoding histone demethylases, histone deacetylases, argonaute-like proteins and polycomb proteins were located in these yield QTL regions. A total of 336 highly expressed transcription factor (TF) genes belonging to 50 TF families were identified in the yield QTL intervals. These findings provide the starting genomic materials to elucidate the molecular basis of yield related traits and heterosis in rice. PMID:24743656

  18. Heterosis en la longevidad de obreras Apis mielífera

    Directory of Open Access Journals (Sweden)

    J. Tello

    2001-07-01

    Full Text Available Se estimó la media y la heterosis de la longevidad en obreras de abejas Apis mellifera. El expe-rimento fue desarrollado en el Apiario del Departamento de Genética de la Facultad de Medi-cina de la USP-Ribeirão Preto-Brasil y en Jaboticabal-SP, de 03/1997 a 05/1999. Seleccionamos 8 matrices inseminadas del apiário-USP (2africanizadas, 2italianas, 2cárnicasy 2italianas*cárnicos y 2 matrices (grupo-testigo de abejas Africanizadas-Silvestres.

  19. Heterosis for oil content in maize populations andhybrids of high quality protein

    Directory of Open Access Journals (Sweden)

    Lázaro José Chaves

    2006-01-01

    Full Text Available This study aimed to evaluate QPM populations and their crosses for grain oil content to determine theheterosis and its components. Ninety-six hybrids and their 21 parents were analyzed and separated in the groups dent andflint, in the partial diallelic/diallel intergroup scheme. The oil content was extracted from dry matter by the Soxhlet method inthree replicates for each genotypic material and attained mean values of 5.04g 100g-1 and 4.78g 100g-1, respectively, in thegroups dent and flint. Among the hybrid crosses, CMS 456 x CMS 463 (6.84g 100g-1 presented the highest value. Althoughthe average heterosis (-9.83% indicates average dominance of the alleles for low oil content, combinations with positive totalheterosis were observed. In this sense, the best populations under the focus of improvement for high oil content were ZQP101and ZQP103, both of the dent group, and CMS52, BR473, CMS455c and CMS465 of the flint group. Hence, it was concludedthat there is genetic variability and significant heterosis in the genotypes under study.

  20. Hormone-regulated defense and stress response networks contribute to heterosis in Arabidopsis F1 hybrids.

    Science.gov (United States)

    Groszmann, Michael; Gonzalez-Bayon, Rebeca; Lyons, Rebecca L; Greaves, Ian K; Kazan, Kemal; Peacock, W James; Dennis, Elizabeth S

    2015-11-17

    Plant hybrids are extensively used in agriculture to deliver increases in yields, yet the molecular basis of their superior performance (heterosis) is not well understood. Our transcriptome analysis of a number of Arabidopsis F1 hybrids identified changes to defense and stress response gene expression consistent with a reduction in basal defense levels. Given the reported antagonism between plant immunity and growth, we suggest that these altered patterns of expression contribute to the greater growth of the hybrids. The altered patterns of expression in the hybrids indicate decreases to the salicylic acid (SA) biosynthesis pathway and increases in the auxin [indole-3-acetic acid (IAA)] biosynthesis pathway. SA and IAA are hormones known to control stress and defense responses as well as plant growth. We found that IAA-targeted gene activity is frequently increased in hybrids, correlating with a common heterotic phenotype of greater leaf cell numbers. Reduced SA concentration and target gene responses occur in the larger hybrids and promote increased leaf cell size. We demonstrated the importance of SA action to the hybrid phenotype by manipulating endogenous SA concentrations. Increasing SA diminished heterosis in SA-reduced hybrids, whereas decreasing SA promoted growth in some hybrids and phenocopied aspects of hybrid vigor in parental lines. Pseudomonas syringae infection of hybrids demonstrated that the reductions in basal defense gene activity in these hybrids does not necessarily compromise their ability to mount a defense response comparable to the parents.

  1. Relationship between genetic distance, specific combining abilities and heterosis in maize (Zea mays L.

    Directory of Open Access Journals (Sweden)

    Pavlov Jovan

    2016-01-01

    Full Text Available Six maize inbred lines for which we assumed that have a similar genetic background were selected for the study. Inbred lines were crossed according to incomplete diallel design and fifteen hybrid combinations were obtained. Hybrid combinations and their parental lines were used in our study. The objective of the study was to examine genetic polymorphism of parental lines, as well as to determine relationships between SSR genetic distance and values of high parent heterosis and specific combining abilities for grain yield. By using 19 SSR primers we classified inbred lines in two groups. First cluster consists of inbred lines L1, L2, L3, L4 and L5, while inbred line L6 formed second cluster, indicating different heterotic background in comparison to the other five inbred lines. The Spearman’s correlation coefficients between SSR based genetic distance and specific combining abilities for grain yield had a value of (r=0,53*, while positive correlation were also found between genetic distance and high parent heterosis (r=0,57*. [Projekat Ministarstva nauke Republike Srbije, br. TR31068

  2. Heterosis and Breed Effects for Milk Production, Udder Health and Fertility in Danish Herds applying Systematic Crossbreeding

    DEFF Research Database (Denmark)

    Norberg, Elise; Sørensen, Lydia Henriette; Byskov, Kenneth

    Use of systematic crossbreeding in dairy cattle has been increasing the last decades. The aim of this study was to estimate the effect of breed and heterosis on protein yield (PY), somatic cell score (SCS) and days from calving to first insemination (CFI) in first lactation crosses between Danish...

  3. Chromosomal regions involved in hybrid performance and heterosis : their AFLP-based identification and practical use in prediction models

    NARCIS (Netherlands)

    Vuylsteke, M.; Kuiper, M.; Stam, P.

    2000-01-01

    In this paper, a novel approach towards the prediction of hybrid performance and heterosis is presented. Here, we describe an approach based on: (i) the assessment of associations between AFLPÒ22 AFLPÒ is a registered trademark of Keygene N.V. ,33 The methylation AFLPÒ method is subject to a patent

  4. Combining Ability and Heterosis for Grain Yield and its Component Traits in Rice(Oryza sativa L.

    Directory of Open Access Journals (Sweden)

    Srikrishna LATHA

    2013-02-01

    Full Text Available The nature and magnitude of heterosis and combining ability was studied in 18 F1 hybrids involving three CMS lines and six testers using line × tester analysis. The analysis of variance for combining ability of all the traits showed that variances due to treatments, parents, hybrids were highly significant. The line ‘CRMS 32A’ and testers viz. ‘Super rice-8’, ‘R 1099-2569-1-1’ and ‘Jitpiti’ were identified as good general combiners. The significant differences between lines x testers interaction indicates that SCA attributed heavily in the expression of these traits and demonstrates the importance of dominance or non additive variances for all the traits. The hybrid ‘CRMS 32A’/‘R 1099-2569-1-1’ and ‘APMS 6A’/‘Super rice-8’ were promising for grain yield. The magnitude of relative heterosis, heterobeltiosis and standard heterosis were also estimated for different characters. A high degree of relative heterosis was observed for grain yield (20.45- 82.37% in the hybrids viz., ‘CRMS 32A’/‘Super rice-8’, ‘APMS 6A’/‘Super rice-8’, ‘APMS 6A’/‘Jitpiti’ and ‘CRMS 32A’/‘R 1099-2569-1-1’. While, a higher degree of: heterobeltiosis (13.60 -68.37% was observed for grain yield in the hybrids viz., ‘CRMS 32A’/‘Super rice-8’, ‘CRMS 32A’/‘R 1099-2569-1-1’, ‘APMS 6A’/’Super rice-8’ and ‘APMS 6A’/’Jitpiti’. A high degree of standard heterosis was observed for grain yield in the hybrid ‘CRMS 32A’/‘R 1099-2569-1-1’. The hybrid ‘CRMS 32A’/ ‘R 1099-2569-1-1’ recorded a high degree of relative heterosis (62.01%, heterobeltiosis (57.35% and standard heterosis (15.05 and 25.51% over check hybrids, ‘Mahamaya’ and ‘Indirasona’, respectively that can be tested on yield trials for its further testing over locations.

  5. Heterosis for flower and fruit traits in tomato ( Lycopersicon ...

    African Journals Online (AJOL)

    Seven accessions and one locally approved variety were crossed in half diallel fashion and the resulting F1 progeny along with their parents were evaluated in a 6 × 6 Tripple Lattice Design at Agricultural Research Institute, Mingora (NWFP), Pakistan during 2007 - 2008 crop season. Highly significant differences were ...

  6. Avaliação das heteroses materna e individual sobre o ganho de peso do nascimento ao desmame em bovinos Angus x Nelore Evaluation of maternal and individual heterosis on preweaning gain of Angus x Nellore calves

    Directory of Open Access Journals (Sweden)

    Vanerlei Mozaquatro Roso

    2000-06-01

    individual heterozygosity (covariables, random effects of sire (additive, dam (composite maternal, mendelian segregation and residue. To estimate the effects, an iterative process was used, that alternated genetic analysis for the contemporary groups and additive + maternal effects on the readjusted weight gain for heterosis and statistical analysis to estimate the effects of the covariables on readjusting weight gain for the contemporary groups and additive + maternal effects. The process was ended when the estimates became stable. The results indicated a positive linear relationship between heterozygosity and maternal and individual heterosis. Estimated values of 15.46% (22.62 kg for maternal heterosis and 9.10% (13,31 kg for individual heterosis were observed. Based on the degree of difficulties to estimate the heterosis effects in the present work, it is necessary caution to suggest just the inclusion of heterozygosities in the statistical model and let it be adjusted by itself.

  7. Heterosis and genetic distance in rapeseed (Brasica napus L.). Use of different indicators of genetic divergence in 7x7 diallel

    OpenAIRE

    Lefort-Buson, Marianne; Guillot-Lemoine, Brigitte; Dattée, Yvette

    1986-01-01

    The paper deals with a comparison of different indicators of genetic divergence between rapeseed parental lines : the relationship coefficient defined by MALÈCOT the generalized distance D2 of Mahalanobis, and a new G2 parameter close to HANSON & CASAS' R2. The purpose of the authors is to discuss the advantages of their simultaneous use in the prediction of both heterosis values and F1 performances of hybrids from parental lines. Relationships between heterosis values and genetic distanc...

  8. A Role for CHH Methylation in the Parent-of-Origin Effect on Altered Circadian Rhythms and Biomass Heterosis in Arabidopsis Intraspecific Hybrids[W][OPEN

    Science.gov (United States)

    Ng, Danny W.-K.; Miller, Marisa; Yu, Helen H.; Huang, Tien-Yu; Kim, Eun-Deok; Lu, Jie; Xie, Qiguang; McClung, C. Robertson; Chen, Z. Jeffrey

    2014-01-01

    Hybrid plants and animals often show increased levels of growth and fitness, a phenomenon known as hybrid vigor or heterosis. Circadian rhythms optimize physiology and metabolism in plants and animals. In plant hybrids and polyploids, expression changes of the genes within the circadian regulatory network, such as CIRCADIAN CLOCK ASSOCIATED1 (CCA1), lead to heterosis. However, the relationship between allelic CCA1 expression and heterosis has remained elusive. Here, we show a parent-of-origin effect on altered circadian rhythms and heterosis in Arabidopsis thaliana F1 hybrids. This parent-of-origin effect on biomass heterosis correlates with altered CCA1 expression amplitudes, which are associated with methylation levels of CHH (where H = A, T, or C) sites in the promoter region. The direction of rhythmic expression and hybrid vigor is reversed in reciprocal F1 crosses involving mutants that are defective in the RNA-directed DNA methylation pathway (argonaute4 and nuclear RNA polymerase D1a) but not in the maintenance methylation pathway (methyltransferase1 and decrease in DNA methylation1). This parent-of-origin effect on circadian regulation and heterosis is established during early embryogenesis and maintained throughout growth and development. PMID:24894042

  9. A Role for CHH Methylation in the Parent-of-Origin Effect on Altered Circadian Rhythms and Biomass Heterosis in Arabidopsis Intraspecific Hybrids.

    Science.gov (United States)

    Ng, Danny W-K; Miller, Marisa; Yu, Helen H; Huang, Tien-Yu; Kim, Eun-Deok; Lu, Jie; Xie, Qiguang; McClung, C Robertson; Chen, Z Jeffrey

    2014-06-01

    Hybrid plants and animals often show increased levels of growth and fitness, a phenomenon known as hybrid vigor or heterosis. Circadian rhythms optimize physiology and metabolism in plants and animals. In plant hybrids and polyploids, expression changes of the genes within the circadian regulatory network, such as CIRCADIAN CLOCK ASSOCIATED1 (CCA1), lead to heterosis. However, the relationship between allelic CCA1 expression and heterosis has remained elusive. Here, we show a parent-of-origin effect on altered circadian rhythms and heterosis in Arabidopsis thaliana F1 hybrids. This parent-of-origin effect on biomass heterosis correlates with altered CCA1 expression amplitudes, which are associated with methylation levels of CHH (where H = A, T, or C) sites in the promoter region. The direction of rhythmic expression and hybrid vigor is reversed in reciprocal F1 crosses involving mutants that are defective in the RNA-directed DNA methylation pathway (argonaute4 and nuclear RNA polymerase D1a) but not in the maintenance methylation pathway (methyltransferase1 and decrease in DNA methylation1). This parent-of-origin effect on circadian regulation and heterosis is established during early embryogenesis and maintained throughout growth and development. © 2014 American Society of Plant Biologists. All rights reserved.

  10. QTL Mapping of Combining Ability and Heterosis of Agronomic Traits in Rice Backcross Recombinant Inbred Lines and Hybrid Crosses

    Science.gov (United States)

    Luo, Junyuan; Wang, Peng; Yu, Sibin; Mou, Tongmin; Zheng, Xingfei; Hu, Zhongli

    2012-01-01

    Background Combining ability effects are very effective genetic parameters in deciding the next phase of breeding programs. Although some breeding strategies on the basis of evaluating combining ability have been utilized extensively in hybrid breeding, little is known about the genetic basis of combining ability. Combining ability is a complex trait that is controlled by polygenes. With the advent and development of molecular markers, it is feasible to evaluate the genetic bases of combining ability and heterosis of elite rice hybrids through QTL analysis. Methodology/Principal Findings In the present study, we first developed a QTL-mapping method for dissecting combining ability and heterosis of agronomic traits. With three testcross populations and a BCRIL population in rice, biometric and QTL analyses were conducted for ten agronomic traits. The significance of general combining ability and special combining ability for most of the traits indicated the importance of both additive and non-additive effects on expression levels. A large number of additive effect QTLs associated with performance per se of BCRIL and general combining ability, and dominant effect QTLs associated with special combining ability and heterosis were identified for the ten traits. Conclusions/Significance The combining ability of agronomic traits could be analyzed by the QTL mapping method. The characteristics revealed by the QTLs for combining ability of agronomic traits were similar with those by multitudinous QTLs for agronomic traits with performance per se of BCRIL. Several QTLs (1–6 in this study) were identified for each trait for combining ability. It demonstrated that some of the QTLs were pleiotropic or linked tightly with each other. The identification of QTLs responsible for combining ability and heterosis in the present study provides valuable information for dissecting genetic basis of combining ability. PMID:22291881

  11. QTL mapping of combining ability and heterosis of agronomic traits in rice backcross recombinant inbred lines and hybrid crosses.

    Directory of Open Access Journals (Sweden)

    Zhen Qu

    Full Text Available BACKGROUND: Combining ability effects are very effective genetic parameters in deciding the next phase of breeding programs. Although some breeding strategies on the basis of evaluating combining ability have been utilized extensively in hybrid breeding, little is known about the genetic basis of combining ability. Combining ability is a complex trait that is controlled by polygenes. With the advent and development of molecular markers, it is feasible to evaluate the genetic bases of combining ability and heterosis of elite rice hybrids through QTL analysis. METHODOLOGY/PRINCIPAL FINDINGS: In the present study, we first developed a QTL-mapping method for dissecting combining ability and heterosis of agronomic traits. With three testcross populations and a BCRIL population in rice, biometric and QTL analyses were conducted for ten agronomic traits. The significance of general combining ability and special combining ability for most of the traits indicated the importance of both additive and non-additive effects on expression levels. A large number of additive effect QTLs associated with performance per se of BCRIL and general combining ability, and dominant effect QTLs associated with special combining ability and heterosis were identified for the ten traits. CONCLUSIONS/SIGNIFICANCE: The combining ability of agronomic traits could be analyzed by the QTL mapping method. The characteristics revealed by the QTLs for combining ability of agronomic traits were similar with those by multitudinous QTLs for agronomic traits with performance per se of BCRIL. Several QTLs (1-6 in this study were identified for each trait for combining ability. It demonstrated that some of the QTLs were pleiotropic or linked tightly with each other. The identification of QTLs responsible for combining ability and heterosis in the present study provides valuable information for dissecting genetic basis of combining ability.

  12. The use of SSRs for predicting the hybrid yield and yield heterosis in 15 key inbred lines of Chinese maize.

    Science.gov (United States)

    Xu, Su-Xia; Liu, Jie; Liu, Gong-She

    2004-01-01

    A challenge to maize breeders is to predict and identify inbred lines that can produce highly heterotic hybrids precisely. In the present study we surveyed the genetic diversity among 15 elite inbred lines of maize in China with SSR markers and assessed the relationship between SSR marker and hybrid yield/yield heterosis in a diallel set of 105 crosses. Forty-three SSR primers selected from all sixty-three primers gave stable profiles amplified in the sample of 15 inbred lines, which could clearly resolve on 4% metaphor agarose gel. The average number of alleles per SSR locus was 4.44 with a range from 2 to 9. The polymorphism information content (PIC) for the SSR loci varied from 0.28 to 0.81 with a mean of 0.6281. Genetic similarity (GS) among 15 lines was estimated with 191 alleles identified as raw data, the Nei's coefficient of GS ranged from 0.492 for 478 vs HZ4 up to 0.745 for E28 to ZH64 with a mean of 0.619. The cluster diagram based upon the SSR data grouped the 15 lines into families consistent with the yield heterotic response of these. Genetic distance (GD) based on SSR data was significantly correlated with hybrid yield/yield heterosis, the correlation coefficient (r) being 0.5432 and 0.4271 in 1999 and 0.4305 and 0.3614 in 1998 field test, respectively, whereas the determination coefficient (r2) was lower. The correlation between GD based on SSR data and hybrid yield/yield heterosis changed alone with the difference of number and pedigree relationship among parents that were used in this study. SSR makers showed high polymorphism and could be used to assess the relationship between inbred lines of maize, but it was difficult to predict the yield heterosis of maize.

  13. Heterosis in crosses among white grain maize populations with high quality protein Heterose em cruzamentos entre populações de milho de grãos brancos com alta qualidade protéica

    Directory of Open Access Journals (Sweden)

    Márcio Costa Rodrigues

    2006-01-01

    Full Text Available The objective of this work was to investigate heterosis and its components in 16 white grain maize populations presenting high quality protein. These populations were divided according to grain type in order to establish different heterosis groups. The crosses were carried out according to a partial diallel cross design among flint and dent populations. Seven agronomic traits were evaluated in three environments while four leaf diseases and incidence of corn stunt were evaluated in one. Least square procedure was applied to the normal equation X'Xbeta = X'Y, to estimate the model effects and their respective sum of squares. Among the heterosis components, in diallel analysis, significance for average heterosis in grain yield, number of days to female flowering and to all evaluated diseases was detected. Specific heterosis was significant for days to female flowering and resistance to Puccinia polysora. Results concerned to grain yield trait indicate that populations with superior performance in dent group, no matter what flint population group is used in crosses, tend to generate superior intervarietal hybrids. In decreasing order of preference, the dent type populations CMS 476, ZQP/B 103 and ZQP/B 101 and the flint type CMS 461, CMS 460, ZQP/B 104 and ZQP/B 102 are recommended to form composites.O objetivo deste trabalho foi investigar a heterose e seus componentes em 16 populações de milho de grãos brancos, de alta qualidade protéica. Estas populações foram divididas de acordo com o tipo de grão, para estabelecer grupos heteróticos diferentes. Os cruzamentos foram realizados entre populações dentadas e duras, seguindo o esquema dialélico parcial. Sete caracteres agronômicos foram avaliados em três locais, e quatro doenças foliares e a incidência de enfezamento, em um. O procedimento de quadrados mínimos foi aplicado à equação normal X'Xbeta = X'Y, para estimar os efeitos do modelo e suas respectivas somas de quadrados

  14. Expression of heterosis for productive traits in F1 eggplant (Solanum melongena L. hybrids

    Directory of Open Access Journals (Sweden)

    João Alencar de Sousa

    1998-03-01

    Full Text Available This study was carried out to obtain estimates of heterosis in crosses between seven eggplant cultivars (Embu = E; Santa Genebra = SG; Viserba = V; Aubergine de Barbentane = AB; Florida Market 10 = FM; Black Beauty = BB, and Melitino = M and two breeding lines (B-14-07 = B1 and B-31-06 = B2. The F1 hybrids used were: E x FM; E x BB; E x M; E x B1; E x B2; SG x FM; SG x BB; SG x M; SG x B1; SG x B2; V x FM; V x B1; V x B2; AB x FM; AB x M; AB x B1; AB x B2 and M x FM. Cultivars, lines and hybrids were evaluated at the ESAL experimental field in Lavras, MG, from February to October 1992. A randomized complete block design with three replications was used. Significant heterosis relative to the parental means was detected for all traits studied. Their values ranged from +41.23% to +113.31% for total fruit yield, from -11.45% to +26.17% for average fruit weight, and from +27.98% to +141.81% for early production. Heterosis relative to the superior parent ranged from +13.89% to +92.51% for total fruit yield. Hybrid pairs: SG x FM and AB x B1, V x FM and AB x FM, E x M and AB x B1 were the most heterotic relative to the parental mean for total fruit production, mean fruit weight and early production, respectively. The hybrids displaying highest heterosis relative to the superior parent for total yield were AB x B1 and SG x FM.Este trabalho visou obter estimativas da heterose em cruzamentos entre sete cultivares de berinjela (Embu = E, Santa Genebra = SG, Viserba = V, Aubergine de Barbentane = AB, Florida Market 10 = FM, Black Beauty = BB e Melitino = M e duas linhagens (B-14-07 = B1 e B-31-06 = B2. Os híbridos F1 utilizados foram: E x FM; E x BB; E x M; E x B1; E x B2; SG x FM; SG x BB; SG x M; SG x B1; SG x B2; V x FM; V x B1; V x B2; AB x FM; AB x M; AB x B1; AB x B2 e M x FM. O trabalho foi conduzido no campus da ESAL em Lavras-MG, de fevereiro a outubro de 1992. O delineamento empregado foi o de blocos casualizados completos com três repeti

  15. Heterosis in the second and third generation affects litter size in a crossbreed mink (Neovison vison) population

    DEFF Research Database (Denmark)

    Thirstrup, Janne Pia; Pertoldi, Cino; Larsen, Peter Foged

    2014-01-01

    Litter sizes in a cross between Brown and Black mink color types were observed through six generations. Litter size was significantly affected by yearly environmental variations. After adjusting for year effects, we found significant increases in litter size in the second and third generations (F2...... and F3) after crossing. Thereafter, in the following generations, litter size dropped to a level comparable to the mean litter size of the midparent. Increased litter size in F2 compared to F1 indicated that maternal effects influenced litter size more than non-maternal effects. The heterosis was mainly...

  16. Estimation of breed and heterosis effects for growth and carcass traits in cattle using published crossbreeding studies.

    Science.gov (United States)

    Williams, J L; Aguilar, I; Rekaya, R; Bertrand, J K

    2010-02-01

    Current genetic evaluations are performed separately for each breed. Multiple breed genetic evaluations, however, assume a common base among breeds, enabling producers to compare cattle of different breed makeup. Breed and heterosis effects are needed in a multibreed evaluation because databases maintained by breed associations include few crossbred animals, which may not be enough to accurately estimate these effects. The objective of this study was to infer breed effects, maternal effects, direct heterosis effects, and maternal heterosis effects for growth and carcass traits using least squares means estimates from crossbreeding studies published in the literature from 1976 to 1996. The data set was formed by recording each least squares mean along with the breed composition, maternal breed composition, and direct and maternal heterozygosity. Each trait was analyzed using a single trait fixed effect model, which included study as a fixed effect and breed composition and heterozygosity as covariates. Breed solutions for each trait were expressed relative to the Angus breed. Direct breed effects for weaning weight ranged from -7.0 +/- 0.67 kg (British Dairy) to 29.3 +/- 0.74 kg (Simmental), and maternal effects ranged from -11.7 +/- 0.24 kg (Hereford) to 31.1 +/- 2.22 kg (Gelbvieh). Direct breed effects for birth weight ranged from -0.5 +/- 0.14 kg (British Dairy) to 10.1 +/- 0.46 kg (Continental Beef), and maternal effects ranged from -7.2 +/- 0.13 kg (Brahman) to 6.0 +/- 1.07 kg (Continental Beef). Direct breed effects ranged from -17.9 +/- 1.64 kg (Brahman) to 21.6 +/- 1.95 kg (Charolais), from -6.5 +/- 1.29 kg (Brahman) to 55.8 +/- 1.47 kg (Continental Beef), from -8.1 +/- 0.48 cm(2) (Shorthorn) to 21.0 +/- 0.48 cm(2) (Continental Beef), and from -1.1 +/- 0.02 cm (Continental Beef) to 0 +/- 0.00 cm (Angus) for postweaning BW gain, carcass weight, LM area, and fat thickness, respectively. The use of literature estimates to predict direct and maternal breed and

  17. DEPRESIÓN EN VIGOR POR ENDOGAMIA Y HETEROSIS PARA EL RENDIMIENTO Y SUS COMPONENTES EN ZAPALLO Cucurbita moschata Duch. Ex Poir INBREEDING DEPRESSION AND HETEROSIS FOR YIELD AND ITS COMPONENTS IN PUMPKIN Cucurbita moschata Duch. Ex Poir

    Directory of Open Access Journals (Sweden)

    Miguel Mariano Espitia Camacho

    2006-06-01

    Full Text Available El estudio tuvo como objetivos estimar la depresión por endogamia (DE y cuatro tipos de heterosis: promedio general (HP, promedio de progenitores (HM, heterobeltiosis (HB y útil (HU, en dos dialélos [uno entre cinco variedades (V y el otro entre cinco líneas endogamicas S1 (LS1, derivadas de éstas], para el rendimiento por planta (PFP, número de frutos por planta (NFP y peso promedio de fruto (PPF. Los 30 genotipos se evaluaron en el municipio de Candelaria (Valle del Cauca, Colombia, en un diseño de bloques completos al azar con cinco repeticiones. Se presentaron diferencias significativas (p 40 % y HU (>60 % en PFP.With the goal of estimating inbreeding depression (DE and the four types of heterosis: general average (HP, mean (HM, heterobeltiosis (HB and standard (HU, in two diallelic [one among five cross pollinated varieties (VAR and the other among five self-pollinated lines S1(LS1, derived from these], for yield/plant (PFP, number of fruits/plant (NFP and weight/fruit (PPF. The 30 genotypes were evaluated using a complete randomized design with five replicates in Candelaria (Valle del Cauca, Colombia . Significant differences (p 40 % and HU (>60 % in PFP.

  18. Asymmetries, heterosis, and phenotypic profiles of red junglefowl, White Plymouth Rocks, and F1and F2reciprocal crosses.

    Science.gov (United States)

    Sutherland, D A T; Honaker, C F; Dorshorst, B; Andersson, L; Siegel, P B

    2018-03-02

    During the domestication of farm animals, humans have manipulated genetic variation for growth and reproduction through artificial selection. Here, data are presented for growth, reproductive, and behavior traits for the red junglefowl, a line of White Plymouth Rock chickens, and their F 1 and F 2 reciprocal crosses. Intra- and intergenerational comparisons for growth related traits reflected considerable additive genetic variation. In contrast, those traits associated with reproduction exhibited heterosis. The role of sexual selection was seen in the evolution of prominent secondary sexual ornaments that lend to female choice and male-male competition. The large differences between parental lines in fearfulness to humans were only mitigated slightly in the intercross generations. Whereas, overall F 1 generation heterosis was not transferred to the F 2 , there was developmental stability in the F 2 , as measured by relative asymmetry of bilateral traits. Through multigenerational analyses between the red junglefowl and the domestic White Plymouth Rocks, we observed plasticity and considerable residual genetic variation. These factors likely facilitated the adaptability of the chicken to a broad range of husbandry practices throughout the world.

  19. Chromosomal regions involved in hybrid performance and heterosis: their AFLP(R)-based identification and practical use in prediction models.

    Science.gov (United States)

    Vuylsteke, M; Kuiper, M; Stam, P

    2000-09-01

    In this paper, a novel approach towards the prediction of hybrid performance and heterosis is presented. Here, we describe an approach based on: (i) the assessment of associations between AFLP(R) markers and hybrid performance and specific combining ability (SCA) across a set of hybrids; and (ii) the assumption that the joint effect of genetic factors (loci) determined this way can be obtained by addition. Estimated gene effects for grain yield varied from additive, partial dominance to overdominance. This procedure was applied to 53 interheterotic hybrids out of a 13 by 13 half-diallel among maize inbreds, evaluated for grain yield. The hybrid value, representing the joint effect of the genetic factors, accounted for up to 62.4% of the variation in the hybrid performance observed, whereas the corresponding efficiency of the SCA model was 36.8%. Efficiency of the prediction for hybrid performance was evaluated by means of a cross-validation procedure for grain yield of (i) the 53 interheterotic hybrids and (ii) 16 hybrids partly related to the 13 by 13 half-diallel. Comparisons in prediction efficiency with the 'distance' model were made. Because the map position of the selected markers is known, putative quantitative trait loci (QTL) affecting grain yield, in terms of hybrid performance or heterosis, are identified. Some QTL of grain yield detected in the present study were located in the vicinity of loci reported earlier as having quantitative effects on grain yield.

  20. Inter-character relationships and heterosis observed in opaque-2 maize crosses and in their normal analogues.

    Science.gov (United States)

    Gupta, D; Kovács, I

    1974-01-01

    Hybrids obtained from two series of diallel crosses made between six o 2 converted inbred lines on the one hand and their normal analogues on the other were compared for twenty-five characters including yield and several of the yield components, including the parents. Observations on simple inter-character correlation coefficients presented here have shown that the majority of the correlations at the o 2 level are of the same order as at the normal level. A number of correlations of the o 2 type are inferior to those of their normal analogues, whereas a few are favoured by the o 2 gene including the correlation of grain yield with kernels per row. A measure of heterosis for each hybrid over its mid-parent also demonstrated that the o 2 types show poorer heterosis in more cases than do their normal counterparts. Still, in nearly 40 percent of the cases the o 2 hybrids were found to be more heterotic than their normal analogues, particularly for the various maturity characters and several of the yield components. Thus, the possibility of improvement exists in breeding maize with the opaque-2 gene.

  1. Heterosis and Effect of Breed Proportion for Milk Production Traits in Crosses Between Danish Holstein, Danish Red and Danish Jersey

    DEFF Research Database (Denmark)

    Norberg, Elise; Byskov, Kenneth; Kargo, Morten

    2013-01-01

    During the last decade the use of systematic crossbreeding in dairy cattle herds has been increasing in Denmark. The aim of this study was to estimate the effect of breed proportion and heterosis on milk production traits. The study was based on records on milk yield (MY), protein yield (PY......, a random genetic effect of the cow and a residual. Data was analyzed using AI-REML in the DMU package. The effect of breed proportions was estimated relatively to a pure DH. For MY, a pure DR was estimated to give 259 kg less than a pure DH, while a pure DJ gave 1838 kg less than a pure DH. For PY...... between DH and DR was estimated to 177 kg, 5.8 kg and 8.4 kg for MY, PY and FY, respectively. Corresponding figures for crosses between DH and DJ was 320 kg, 13.4 kg and 17.5 kg, while crosses between DR and DJ gave heterosis estimates of 380 kg, 14.3 kg and 20.2 for MY, PY and FY, respectively...

  2. Correlação da heterose de híbridos de milho com divergência genética entre linhagens Correlation between the heterosis of maize hybrids and genetic divergence among lines

    Directory of Open Access Journals (Sweden)

    Paula de Souza Guimarães

    2007-06-01

    Full Text Available O objetivo deste trabalho foi avaliar a produtividade de híbridos simples de milho obtidos de cruzamentos dialélicos entre linhagens divergentes, estimar a capacidade de combinação das linhagens e confirmar se a divergência genética entre as linhagens, obtida por marcadores moleculares, é correlacionada com a heterose dos híbridos simples no campo. Trinta e seis híbridos resultantes do dialelo parcial e as 12 linhagens parentais foram avaliadas em Campinas em blocos ao acaso, com três repetições e duas testemunhas. A capacidade de combinação das linhagens foi estimada de acordo com o modelo 4 de Griffing. Estimaram-se a correlação matricial, mediante a estatística de Mantel, entre heterose, produtividade e capacidade específica de combinação com divergência genética por AFLP e SSR. Destacou-se o híbrido PM518 x L111 e as linhagens PM518, IP4035 e L111 apresentaram efeitos positivos da capacidade geral de combinação. As estimativas de heterose variaram de 927 a 6.698 kg ha-1. Houve correlação entre heterose e divergência genética por AFLP e SSR. No entanto, a divergência genética não foi suficiente para determinar a capacidade específica de combinação nem a produtividade dos híbridos.The objective of this work was to evaluate grain yield of maize single cross hybrids obtained from diallel crosses among contrasting lines, to estimate the combining ability of the lines, and finally to confirm if the genetic diversity among those lines assessed by molecular markers is correlated with single cross hybrids heterosis. The 36 single cross hybrids resulting from partial diallel and 12 parental lines were evaluated in Campinas in randomized block design, with three replicates and two control lines checks. General combining ability of the lines was estimated according to Griffing model 4. Correlations among matrices were estimated through Mantel statistics, considering heterosis, yield and specific combining ability with

  3. Capacidade combinatória, divergência genética entre linhagens de milho e correlação com heterose Combining ability, genetic divergence among maize lines and correlation with heterosis

    Directory of Open Access Journals (Sweden)

    Maria Elisa Ayres Guidetti Zagatto Paterniani

    2008-01-01

    heterosis Thirty-six single-crosses resulting from partial diallel and the 12 parental lines were evaluated in Campinas, State of São Paulo, in randomized block design, with tree replicates and two commercial checks. The following traits were evaluated: plant and ear height, ear weight and grain weight. Individual variance analysis of hybrids were performed, and the averages were compared by Tukey test (P<0.05. General combining ability of the lines was obtained according to Geraldi e Miranda Filho. Correlations among matrices were estimated through Mantel statistics, considering heterosis, yield and specific combining ability with genetic divergence assessed by AFLP and SSR. The hybrid PM624 x IP398 exhibited outstanding yield capacity and the lines VER266 and L105 showed positive GCA for grain yield. Estimate heterosis ranged from -559 to 6.320 kg ha-1. No significant correlation was observed between heterosis, specific combination ability or grain yield with genetic distance assessed by AFLP and SSR. Therefore, no prediction of hybrids performance could be made on the basis of the genetic divergence of the parent lines.

  4. Evaluación de la habilidad combinatoria y heterosis de siete progenitores de arveja Pisum sativum L.

    Directory of Open Access Journals (Sweden)

    Espinosa Natalia

    2005-12-01

    Full Text Available

    En Colombia se carece de información referente al tipo de control genético en la arveja que gobierna la precocidad, el rendimiento y sus componentes. El objetivo de este trabajo fue evaluar la habilidad combinatoria y heterosis en cuatro líneas y tres variedades comerciales de arveja, para once variables agronómicas. Se desarrolló un diseño dialélico (Griffing, método 1, modelo 1 con siete materiales, bajo condiciones de la Sabana de Bogotá. Se hizo el análisis de varianza y se obtuvieron los valores estimados para habilidad combinatoria general (HCG y específica (HCE, y se calcularon los valores de heterosis sobre la media parental (HMP y sobre el mejor padre (HBP. La HCG fue altamente significativa para ocho de los caracteres evaluados y la HCE fue significativa para: nudos hasta la primera flor, longitud de vaina, número de semillas por vaina y peso de 100 semillas. Las variedades ‘Pequinegra’, ‘Santa Isabel’ e ‘ICA Tominé’ fueron los mejores combinadores generales. La variedad ‘Pequinegra’ tuvo efectos recíprocos altamente significativos en caracteres asociados con precocidad. En cuanto a la evaluación de heterosis, los híbridos F1 tuvieron un mejor comportamiento que la media de sus parentales en cinco de los componentes de rendimiento. Aún cuando sólo tres de las progenies en estudio fueron más precoces que el mejor padre, para la HMP se hallaron valores negativos que indican precocidad para más de la mitad de los cruces evaluados. Se encontró una asociación importante entre el tamaño de la vaina y el peso de 100 semillas.

  5. Heterosis in the second and third generation affects litter size in a crossbreed mink (Neovison vison population

    Directory of Open Access Journals (Sweden)

    Thirstrup Janne

    2014-01-01

    Full Text Available Litter sizes in a cross between Brown and Black mink color types were observed through six generations. Litter size was significantly affected by yearly environmental variations. After adjusting for year effects, we found significant increases in litter size in the second and third generations (F2 and F3 after crossing. Thereafter, in the following generations, litter size dropped to a level comparable to the mean litter size of the midparent. Increased litter size in F2 compared to F1 indicated that maternal effects influenced litter size more than non-maternal effects. The heterosis was mainly caused by an increase in litter size compared to the Black parental line. This indicates that the Black line was affected by inbreeding depression prior to crossing. We also found that two-year old F1 females had significantly more offspring compared to one-year old F1 females.

  6. Up-regulating the abscisic acid inactivation gene ZmABA8ox1b contributes to seed germination heterosis by promoting cell expansion.

    Science.gov (United States)

    Li, Yangyang; Wang, Cheng; Liu, Xinye; Song, Jian; Li, Hongjian; Sui, Zhipeng; Zhang, Ming; Fang, Shuang; Chu, Jinfang; Xin, Mingming; Xie, Chaojie; Zhang, Yirong; Sun, Qixin; Ni, Zhongfu

    2016-04-01

    Heterosis has been widely used in agriculture, but the underlying molecular principles are still largely unknown. During seed germination, we observed that maize (Zea mays) hybrid B73/Mo17 was less sensitive than its parental inbred lines to exogenous abscisic acid (ABA), and endogenous ABA content in hybrid embryos decreased more rapidly than in the parental inbred lines. ZmABA8ox1b, an ABA inactivation gene, was consistently more highly up-regulated in hybrid B73/Mo17 than in its parental inbred lines at early stages of seed germination. Moreover, ectopic expression of ZmABA8ox1b obviously promoted seed germination in Arabidopsis Remarkably, microscopic observation revealed that cell expansion played a major role in the ABA-mediated maize seed germination heterosis, which could be attributed to the altered expression of cell wall-related genes. © The Author 2016. Published by Oxford University Press on behalf of the Society for Experimental Biology.

  7. Relationship of Parental Genetic Distance with Heterosis and Specific Combining Ability in Sesame (Sesamum indicum L.) Based on Phenotypic and Molecular Marker Analysis.

    Science.gov (United States)

    Pandey, Sarita K; Dasgupta, Tapash; Rathore, Abhishek; Vemula, Anilkumar

    2018-01-10

    The genetic distance analysis for selection of suitable parents has been established and effectively used in many crops; however, there is dearth of conclusive report of relationship of genetic distance analysis with heterosis in sesame. In the present study, an attempt was made to estimate the associations of genetic distances using SSR (GDSSR), seed-storage protein profiling (GDSDS) and agro-morphological traits (GDMOR) with hybrid performance. Seven parents were selected from 60 exotic and Indian genotypes based on genetic distance from clustering pattern based on SSR, seed-storage protein, morphological traits and per se performance. For combining ability analysis, 7 parents and 21 crosses generated from 7 × 7 half diallel evaluated at two environments in a replicated field trial during pre-kharif season of 2013. Compared with the average parents yield (12.57 g plant -1 ), eight hybrids had a significant (P < 0.01) yield advantage across environments, with averages of 26.94 and 29.99% for better-parent heterosis (BPH) and mid-parent heterosis (MPH), respectively, across environments. Highly significant positive correlation was observed between specific combining ability (SCA) and per se performance (0.97), while positive non-significant correlation of BPH with GDSSR (0.048), and non-significant negative correlations with GDMOR (- 0.01) and GDSDS (- 0.256) were observed. The linear regressions of SCA on MPH, BPH and per se performance of F 1 s were significant with R 2 value of 0.88, 0.84 and 0.95 respectively. The present findings revealed a weak association of GDSSR with F 1 's performance; however, SCA has appeared as an important factor in the determination of heterosis and per se performance of the hybrids. The present findings also indicated that parental divergence in the intermediate group would likely produce high heterotic crosses in sesame.

  8. ESTIMATES OF BREED DIRECT, MATERNAL AND HETEROSIS EFFECTS FOR WEANING AND YEARLING WEIGHTS OF BEEF CATTLE IN THE HUMID TROPICS OF MEXICO

    Directory of Open Access Journals (Sweden)

    M.M. Osorio-Arce

    2010-07-01

    Full Text Available The objective of this study was to estimate the breed-direct, breed-maternal and heterosis effects from data obtained for weaning and yearling weights of Brahman and its crosses with Charolais, Simmental, Brown Swiss breeds in a beef herd in Tabasco, Mexico. The climate of the region is tropical humid. Data were obtained on 1217 calves born from 1995 to 2007; among the 16 breed-group combinations one was purebred mating (Brahman, 3 two-breed static crosses, 7 three-breed static crosses and 5 backcrosses. Cows were fed in paddocks of Jaragua grass (Hyparrenia rufa of poor condition and invaded with native grass of Paspalum and Axonopous genera. Calves remained with their dams until weaning. They were weighed at weaning and about one year of age. Calve weights from the record cards kept at the ranch were used to calculate adjusted weaning (W240 and yearling weights (W365. During the 13 year period of data collection, 711 cows and heifers were inseminated with semen of 23 Charolais (Ch, 50 Simmental (Si, 19 Brown Swiss (BS and 15 Brahman (Br unrelated sires. Also 32 Br bulls were used for natural mating. A multiple regression procedure was used to obtain estimates of the breed-direct, breed-maternal and direct heterosis effects for W240 and W365. The overall means and standard errors for W240 and W365 were 178.5+0.89 and 219.9+1.78 kg, respectively. The analysis of variance showed significant (P0.20 for W365. Except for the Si x Br negative heterosis value for W240, all heterosis effects were positive but nonsignicant (P>0.12.

  9. Larval salivary glue protein heterosis and dosage compensation among the interspecific F1 hybrids of Drosophila nasuta nasuta and Drosophila nasuta albomicans

    Directory of Open Access Journals (Sweden)

    Raghavan Prithi

    2016-01-01

    Full Text Available Reciprocal cross effects with respect to larval salivary secretory protein levels were studied in the interspecific fertile reciprocal hybrids by crossing Drosophila nasuta nasuta, and Drosophila nasuta albomicans. These proteins are produced copiously during the third larval instar stage and are believed to play a role in the attachment of pupa to the substratum prior to pupariation as well as in insect immunity. Quantitative variations were encountered among the reciprocal hybrids. Significant heterosis was observed between D. n. nasuta and the F1 hybrid female of a cross between D. n. albomicans female and D. n. nasuta male (21.39% while the F1 hybrids of a cross between D. n. nasuta female and D. n. albomicans male showed a marginal increase (4.24% from the mid parent level. The glue secretions were correlated to total cell number but independent of gland size. SDS PAGE revealed a considerable heterosis with respect to X-linked protein fractions. Here we report sex specific biochemical heterosis. However the X-linked fractions undergo dosage compensation in both parents and hybrids indicating strict regulatory control.

  10. HETEROSE E CAPACIDADE COMBINATÓRIA ENTRE VARIEDADES DE MILHO EM SOLO ÁCIDO HETEROSIS AND COMBINING ABILITY AMONG VARIETIES OF MAIZE IN ACID SOIL

    Directory of Open Access Journals (Sweden)

    José Branco de Miranda Filho

    2007-09-01

    for breeding purposes was the objective of this study. Ten maize varieties (populations, previously selected for resistance to Puccinia polysora, Phaeosphaeria maydis, Physopella zeae, Exserohilum turcicum and corn stunt complex, were evaluated under the diallel crossing scheme. Varieties and crosses were evaluated in acid and low fertility soil. Analyzed traits were: ear yield (EY, plant height (PH, and ear height (EH. Varieties PMI 8701, CMS 57NF, PMI 9401 CMS 58ND and AMARILLO DENTADO DMR showed the highest yields (above 3.5 t/ ha per se representing more than 70% in relation to check yield. Heterosis showed significance for all traits, but among the components of heterosis only average heterosis was significant for EY and specific heterosis for EH. General combining ability effects (gi were significant for all traits, and their highest EY estimates (t/ha were for PMI 8701 (0.150, BR 105 (0.120, CMS 59 (0.106. The cross CMS 57NF x PMI 8701, with yield of 5.11 t/ha (above both hybrid checks and heterosis of 23.7% above mid-parent, may be indicated as a potentially useful heterotic group. Varieties PMI 8701, CMS 57NF, PMI 9401 and CMS 58ND were considered the most promising intrapopulation breeding programs, for acid soils.

    KEY-WORDS: Heterosis; acidity stress; combining ability; germplasm.

  11. ESTIMATES OF BREED DIRECT, MATERNAL AND HETEROSIS EFFECTS FOR WEANING AND YEARLING WEIGHTS OF BEEF CATTLE IN THE HUMID TROPICS OF MEXICO

    OpenAIRE

    M.M. Osorio-Arce; José C. Segura

    2010-01-01

    The objective of this study was to estimate the breed-direct, breed-maternal and heterosis effects from data obtained for weaning and yearling weights of Brahman and its crosses with Charolais, Simmental, Brown Swiss breeds in a beef herd in Tabasco, Mexico. The climate of the region is tropical humid. Data were obtained on 1217 calves born from 1995 to 2007; among the 16 breed-group combinations one was purebred mating (Brahman), 3 two-breed static crosses, 7 three-breed static crosses and 5...

  12. Heteroses materna e individual para ganho de peso pré-desmama em bovinos Nelore × Hereford e Nelore × Angus Maternal and individual heterosis for preweaning daily gain in Nellore × Hereford and Nellore × Angus cattle

    Directory of Open Access Journals (Sweden)

    R.A. Teixeira

    2005-08-01

    Full Text Available Foram utilizados dados de 62.985 animais das raças Nelore, Hereford, Angus e produtos de cruzamentos Nelore × Angus e Nelore × Hereford de rebanhos comerciais a fim de estimar os efeitos de heterose materna e individual para o ganho médio diário no período pré-desmama (GMD. Os valores obtidos de heterose individual e materna considerando-se o valor médio de GMD da população representam um acréscimo de 6,2% e 11,2% no GMD para os animais F1 e filhos de vacas F1, respectivamente. A heterose materna correspondeu a 64,5% da heterose total. Animais cruzados Bos taurus × Bos indicus obtêm GMD maior do que o dos animais das raças puras.Data on 62.985 Nellore, Hereford, Angus and Nellore × Angus and Nellore × Hereford crossbred calves were analyzed to estimate maternal and individual heterosis for preweaning daily weight gain (PWD. The individual and maternal heterosis of average daily weight gain showed improvements of 6.2 and 11.2% for PWD of F1 calves and for calves borne from F1 dams. Maternal heterosis corresponded to 64.5% of total heterosis. Bos taurus × Bos indicus crossbred cattle have a PWD larger than the average of purebred cattle.

  13. results

    Directory of Open Access Journals (Sweden)

    Salabura Piotr

    2017-01-01

    Full Text Available HADES experiment at GSI is the only high precision experiment probing nuclear matter in the beam energy range of a few AGeV. Pion, proton and ion beams are used to study rare dielectron and strangeness probes to diagnose properties of strongly interacting matter in this energy regime. Selected results from p + A and A + A collisions are presented and discussed.

  14. Estimates of combining ability and heterosis for growth traits in a full ...

    African Journals Online (AJOL)

    user

    males and five females per strain were used to produce 30 full-sib families. Purebred strains assigned for normal group were made by crossing only one male and female each, resulting in 33 different families in total. For each stock, females were stimulated for spawning using oxytocin and fertilized with the milt from each ...

  15. Heterosis, the catapult effect and establishment success of a colonizing bird.

    Science.gov (United States)

    Drake, John M

    2006-06-22

    The genetic basis of population colonization is poorly understood, particularly in animals. Here, I introduce the idea of a 'catapult effect' to explain how the effects of transient increases in fitness can be retained in population demography diminishing the chance of extinction. I tested this idea using information on historical introductions of hybrid and non-hybrid pheasants in the United States. I found that hybrid pheasants were 2.2 times more likely to establish than non-hybrid strains. Analysis of fitness components failed to support the alternative that the increased odds of establishment resulted from increased genetic variation conferring permanent fitness benefits through directional selection or by purging deleterious alleles. These results show that even ephemeral increases in fitness can affect the persistence of small populations.

  16. Capacidade combinatória e heterose em populações de milho crioulo Combining ability and heterosis in maize landraces

    Directory of Open Access Journals (Sweden)

    Josué Maldonado Ferreira

    2009-04-01

    an 8x8 lattice, with five and four replications in Palmeira and Londrina, Paraná, Brazil, respectively. The results of the populations per se showed different performances for each local, but BR 106, Cabo Roxo, Palha Roxa, Ouro Verde e Comum Antigo x Sabugo Fino showed higher grain yield means in both places, that did not differ significantly to the means of the commercial checks (AG1051 and C125. The average heterosis effects were significant for grain yield, plant height, ear placement and root lodging percentage, without local interactions. The top-crosses produced 10.2% (Palmeira and 8.5% (Londrina more than the same populations per se. The populations Palha Roxa; Milho Sem Nome; Pintado e Comum Antigo x Sabugo Fino showed the highest effects of general combining ability for grain yield and took part in the better composite predictions.

  17. Introgressing subgenome components from Brassica rapa and B. carinata to B. juncea for broadening its genetic base and exploring intersubgenomic heterosis

    Directory of Open Access Journals (Sweden)

    Zili Wei

    2016-11-01

    Full Text Available Brassica juncea (AjAjBjBj, is an allotetraploid that arose from two diploid species, B. rapa (ArAr and B. nigra (BnBn. It is an old oilseed crop with unique favorable traits, but the genetic improvement on this species is limited. We developed an approach to broaden its genetic base within several generations by intensive selection. The Ar subgenome from the Asian oil crop B. rapa (ArAr and the Bc subgenome from the African oil crop B. carinata (BcBcCcCc were combined in a synthesized allohexaploid (ArArBcBcCcCc, which was crossed with traditional B. juncea to generate pentaploid F1 hybrids (ArAjBcBjCc, with subsequent self-pollination to obtain newly synthesized B. juncea (Ar/jAr/jBc/jBc/j. After intensive cytological screening and phenotypic selection of fertility and agronomic traits, a population of new-type B. juncea was obtained and was found to be genetically stable at the F6 generation. The new-type B. juncea possesses good fertility and rich genetic diversity and is distinctly divergent but not isolated from traditional B. juncea, as revealed by population genetic analysis with molecular markers. More than half of its genome was modified, showing exotic introgression and novel variation. In addition to the improvement in some traits of the new-type B. juncea lines, a considerable potential for heterosis was observed in inter-subgenomic hybrids between new-type B. juncea lines and traditional B. juncea accessions. The new-type B. juncea exhibited a stable chromosome number and a novel genome composition through multiple generations, providing insight into how to significantly broaden the genetic base of crops with subgenome introgression from their related species and the potential of exploring inter-subgenomic heterosis for hybrid breeding.

  18. Capítulo XI: análisis de la heterosis y de la habilidad combinatoria entre diferentes cultivares de tomate, Lycopersicon esculentum, Mill. a partir de un cruzamiento dialélico

    Directory of Open Access Journals (Sweden)

    Sanint P. Rodrigo

    1994-12-01

    Full Text Available

    An analysis of heterosis and combining ability of traits related with per plant production was carried out using a diallel crossing between different tomato cultivars, Lycopersicon esculentum Mill (six parents and 15 F, hybrids from all possible crossing in one direction, according to the methodology proposed by Griffing (1956, selecting experimental method 2, and model 1. In the genetic variation of all traits related to per plant production, the general combining ability (addite gene action and specific combining abilyty (non-aditive gene action effects participate jointly and in high1y significant manner. Hybrids Motelle x Angela I 5200, Motelle x Zarnbao y Licapal 21 x Zarnbao, exhibited high s.c.a. effects for the trait per plant production. Former effects related to high heterosis make these hybrids promising for later marketing.

    Se analizó la heterosis y la habilidad combinatoria para el carácter producción por planta y sus componentes, a partir de un cruzamiento dialélico (6 progenitores, 15 híbridos F1 sin incluir los recíprocos utilizando el método experimental 2, modelo 1 propuesto por Griffing (1956. Se encontraron diferencias altamente significativas para los efectos de h.c.g. y de h.c.e. para todos los caracteres estudiados. Los híbridos Motelle x Angela I 5100, Motelle x Zambao y Licapal-21 x Zambao presentaron altos efectos de h.c.e. para el carácter producción por planta. Los anteriores efectos asociados con altas heteroheltiosis hacen que estos híbridos sean promisorios para posterior comercialización.

  19. Desempenho agronômico e heterose de genótipos de cebola Agronomic performance and heterosis of onion genotypes

    Directory of Open Access Journals (Sweden)

    Marcos V Faria

    2012-06-01

    Full Text Available A utilização de híbridos de cebola no Brasil ainda é recente e são escassas as informações referentes aos ganhos por heterose. Contudo, a primeira etapa para a exploração da heterose é a avaliação do germoplasma disponível. Devido à necessidade de genótipos adaptados às condições climáticas paranaenses, o presente trabalho teve como objetivo avaliar o desempenho agronômico de 19 híbridos e 50 linhagens de cebola, bem como o ganho heterótico de seis desses híbridos avaliados na região Centro-Sul do Paraná. O delineamento experimental foi em blocos casualizados com três repetições. Foi avaliada a produção e a massa média de bulbos, a classificação comercial, a cerosidade das folhas e o ciclo. De modo geral os híbridos foram superiores às linhagens na produtividade e massa média de bulbos e apresentaram menor ciclo. O ganho heterótico nos híbridos ficou evidenciado nos cruzamentos avaliados, indicando que híbridos podem ser viáveis para cultivo na região. Os híbridos 2572, 2573 e 2578 são promissores, pois aliam alta produtividade, ciclo mais precoce e melhor classificação dos bulbos. As linhagens 2507-1 e 2983 proporcionam elevado ganho heterótico para a produtividade do híbrido 2857, o qual foi classificado no grupo de genótipos mais precoces, demonstrando a existência de correlação inversa entre esses dois caracteres.The use of onion hybrids in Brazil is still recent, with little information regarding the gains from heterosis. However, the first step to exploit the heterosis is the evaluation of available germplasm. Due to the need for genotypes adapted to the climatic conditions of South-Central region of Paraná state, Brazil, this study aimed to evaluate the agronomic performance of 19 hybrids and 50 inbred lines of onion, as well as the heterotic gain of six of these hybrids. The experimental design was randomized blocks with three replications. The evaluated traits were yield, average

  20. Inbreeding, heterosis, fertility, plasmon differentiation and Phytophthora resistance in Solanum verrucosum Schlechtd., and some interspecific crosses in Solanum

    NARCIS (Netherlands)

    Abdalla, M.M.F.

    1970-01-01

    Solanum verrucosum (2n = 24) is a self-compatible, highly fertile species. This conclusion is drawn from the results of studies on 21 various introductions of this species. In spite of self-compatibility and good male and female fertility, the species generally needs a pollinating agent to

  1. Estimación de la Heterosis para Producción de Leche Vendible, Intervalo entre Partos y Duración de la Lactancia en Ganado Cruzado

    Directory of Open Access Journals (Sweden)

    Montoya S. Camilo

    1998-12-01

    Full Text Available En la presente investigación se revisaron 4948 datos referentes a lactancias de vacas en razas B taurus y B indicus, los cuales se obtuvieron entre los años 1986 y 1994 en las Ganaderías La Unión y La K, localizadas en los municipios Plato y Santa Ana en el departamento de Magdalena; San Fernando Pinillos y Magangué en el departamento de Bolívar; y Playones de Sucre y Buenavista en el departamento de Sucre. Para determinar la influencia de los diferentes efectos tanto genéticos como no genéticos sobre las características a estudiar, se utilizó el programa de mínimos cuadrados de Harvey (1988. Los efectos tenidos en cuenta en los modelos para las características leche vendible, días de lactancia e intervalo entre partos fueron: El grupo genético materno, la época y año de parto, número de parto, y hato. Como cavariables se tuvieron en cuenta el peso al destete, la producción de leche duración de la lactancia y el intervalo entre partos según el modelo a estudiar. De los factores 110 genéticos la gran mayoría dieron efecto significativo a los niveles del (P~0.05; no presentaron significancia la época para la duració1l de la lactancia y el grupo genético para el intervalo entre partos; y las covariables intervalo entre partos para la producción de leche y producción de leche en el modelo para el intervalo entre partos. La estimación de la heterosis se hizo una vez realizados los contrastes ortogonales entre los grupos genéticos para las características en las cuales el grupo racial presentó significancia en los ANAVAS. La heterosis obtenida para la producción de leche teniendo como base el promedio de las raza Criolla y el promedio entre el Criollo y el Cebú fue respectivamente: ½ Taurus-1/2 Criollo (17.95% y 22.5%; ½ Taurus - ½ Cebú (9% y 14%; Trihíbrido (7.7% y 11. 7%; ¼ Taurus- ¾ Cebú (5% y 9%; ½ Cebú- ½ Criollo (1.05% y 4.8%; y el ¾ Cebú- ½ Criollo (-7.88% y -4.46%; todas altamente

  2. Análisis de la heterosis y de la habilidad combinatoria entre diferentes cultivares de tomate, Lycopersicon esculentum Mill. a partir de un cruzamiento dialélico

    Directory of Open Access Journals (Sweden)

    Vallejo Cabrera Franco Alirio

    1989-06-01

    Full Text Available Se realizó el análisis de la heterosis y de la habilidad combinatoria entre 21 cultivares de tomate, para el carácter producción por planta y sus componentes a partir de un cruzamiento dialélico (6 progenitores, 15 híbridos F1, sin incluir los recíprocos: utilizando el método experimental 2, modelo I propuesto por Griffing (1956. Se encontraron diferencias altamente significativas para los efectos de hcg y de hce para todos los caracteres a excepción del carácter producción de frutos de primera (frutos de más de 180 g. Los híbridos Motelle x Ángela I 5100, Motelle x Zambao y Licapal 21 x Zambao presentaron altos efectos de h c e para el carácter producción por planta. Los anteriores efectos asociados con altas heterobeltiosis hacen que estos híbridos sean promisorios para una posterior comercialización.An analysis of heterosis and combining ability of traits related with per plant production was carried out using a diallele crossing between different tomate cultivars, Lycopersicon esculentum Mill (six parent and 15 F1 hybrids from as possible crossing in one direction, according to the methodology proposed by Griffing (1956, selecting experimental method 2, and model 1. In the genetic variation of all traits related to per plant production, except in first class fruit trait, the general combining ability (gen non addite action effects participate jointly and in highly significant manner. Hybrids Motelle x Angela I 5100, Motelle x Zambao y Licapal21 x Zambao, exhibited high s c a effects for the trait per plant production. Former effects related to high heterobeltyosis make these hybrids promising for later marketing.

  3. Relationship between heterosis and genetic divergence for phosphorus use efficiency and its components in tropical maize Relação entre heterose e divergência genética para a eficiência no uso do fósforo e seus componentes em milho tropical

    Directory of Open Access Journals (Sweden)

    Débora Santos Caixeta

    2013-01-01

    Full Text Available The objective of this study was to determine the relationship between heterosis and genetic divergence for phosphorus use efficiency (PUE in tropical maize. It was used two groups of genitors, each consisting of seven lines, contrasting with each other in the nitrogen and phosphorus use efficiency. It was obtained 41 hybrid combinations between these groups, which were evaluated in low phosphorus. Randomized complete block design with two replications was used. For obtaining the components of variance and the breeding values were used REML/BLUP method. In the genotyping of the parental lines were used 80 microsatellite markers. Through the correlation between genetic distance obtained by the markers and specific combining ability it was not possible to determine with accuracy by molecular markers, the crosses that produced hybrids with the highest heterosis for PUE. Thus, is possible to conclude that there is no relationship between genetic divergence and heterosis for phosphorus use efficiency and its components in tropical maize.O objetivo deste estudo foi determinar a relação entre divergência genética e heterose para a eficiência no uso de fósforo (EUP em milho tropical. Utilizaram-se dois grupos de genitores, compostos de sete linhagens cada, contrastantes entre si para as eficiências no uso de nitrogênio e fósforo. Foram obtidas 41 combinações híbridas entre esses grupos, as quais foram avaliadas em baixo fósforo. Usou-se o delineamento em blocos ao acaso com duas repetições. A obtenção dos componentes de variância e valores genéticos foi realizada via REML/BLUP e, para genotipagem das linhagens genitoras, foram utilizados 80 marcadores microssatélites. Através da correlação entre a distância genética obtida pelos marcadores e a capacidade específica de combinação, observou-se não ser possível a determinação com acurácia, via marcadores moleculares, dos cruzamentos que produziram os híbridos com as maiores

  4. HETEROSIS TO GRAIN PROTEIN CONTENT IN CROSSES AMONG MAIZE POPULATIONS DERIVED FROM COMMERCIAL HYBRIDS HETEROSE PARA TEOR DE PROTEÍNA NO GRÃO EM CRUZAMENTOS ENTRE POPULAÇÕES DE MILHO DERIVADAS DE HÍBRIDOS COMERCIAIS

    Directory of Open Access Journals (Sweden)

    Gladys Rodrigues Costa Pinto

    2008-03-01

    Full Text Available

    One of the greatest concerns on maize breeding throughout the years has been to increase production without reducing nutritional quality. The present study aims to evaluate F2 maize populations with normal endosperm and their crosses, as related to total grain protein content and determining heterosis and its components. The method used for protein content determination was proposed by AOAC ";Official methods of analysis";, adapted and used by CIMMYT (International Center for Maize and Wheat Breeding. The statistical diallelic analysis of data was carried out through the Gardner and Eberhart's model IV (1966. The fundamental operation for parameter estimation as well as for sums of squares calculation was the ordinary minimum squares. It was observed significance for all effects of the adopted model. For the trait total grain protein content, the best genitors were AG-6690 and ZN-8486, and the best hybrid combination was P30K75 x AG-6016.

    KEY-WORDS: Protein content; corn; normal endosperm; diallel crosses.

    Uma das maiores preocupações do melhoramento genético do milho, ao longo dos anos, foi aumentar sua produção, sem diminuir sua qualidade nutricional. Este trabalho objetivou avaliar populações F2 de milho com endosperma normal e seus cruzamentos, quanto ao teor de proteína total, determinando-se a heterose e seus

  5. heterosis and heritability estimates of purine alkaloids

    African Journals Online (AJOL)

    ACSS

    Cocoa (Theobroma cacao L.) is an important allogamous tropical tree crop, whose centre of diversity is considered to be in Central America. Dry cocoa beans from five cocoa clones, and their intercrossed hybrids were analysed based on the variation of alkaloids and polyphenolic compounds contents, in order to gain ...

  6. ROOT VEGETABLES, BREEDING TRENDS, RESULTS

    Directory of Open Access Journals (Sweden)

    M. I. Fedorova

    2017-01-01

    Full Text Available The main advantage of root vegetables is their unique specificity and high economic importance. The benefits and medicinal properties of root vegetables being highly demanded by the market requirements to the commodity are highlighted in the article. The main directions of breeding program for root vegetable crops, including species of Apiaceae family with carrot, parsnips; Chenopodioideae family with red beet; Brassicaceae family with radish, Daikon, Raphanus sativus L. var. lobo Sazonova & Stank, turnip and rutabaga. Initial breeding accessions of carrot, red beet, radish, Daikon, Raphanus sativus L. var. lobo Sazonova & Stank, turnip and rutabaga have been selected out to be used for breeding program for heterosis. The mf and ms breeding lines were developed, and with the use of them the new gene pool was created. Variety supporting breeding program and methods were also proposed. 

  7. Efeitos de Ambiente e de Heterose sobre o Ganho de Peso do Nascimento ao Desmame e sobre os Escores Visuais ao Desmame de Bovinos de Corte Environmental Effects and Heterosis on Weight Gain from Birth to Weaning and on Visual Scores at Weaning of Beef Cattle

    Directory of Open Access Journals (Sweden)

    Rossano André Dal-Farra

    2002-06-01

    Full Text Available Os objetivos deste trabalho foram a obtenção de fatores de correção para efeitos de idade do bezerro, idade da vaca e data juliana do nascimento sobre o ganho de peso do nascimento à desmama (GND e sobre os escores visuais de conformação (C, precocidade (P e musculatura (M e a estimação dos efeitos das heteroses materna e individual nessas características. Foram utilizados dados dos Programas de Melhoramento Genético Natura e Conexão Delta G, totalizando 187.610 bezerros puros e cruzas, nascidos no período de 1989 a 1999 em vários estados do Brasil. Os modelos estatísticos utilizados nas análises consideraram os efeitos fixos de grupo contemporâneo, idade do bezerro (regressão quadrática, idade da vaca (regressão polinomial quadrática-quadrática com nó aos 7 anos, data juliana de nascimento (regressão polinomial quadrática-quadrática-quadrática com nós aos 165 e 260 dias para GND, 150 e 240 dias para C, 165 e 270 dias para P e 155 e 260 dias para M e heterozigoses materna e individual (regressões lineares. Todos os efeitos considerados no modelo influenciaram de forma significativa o GND e os escores de C, P e M. Os valores estimados de heterose materna e individual foram, respectivamente, 8,9% e 9,9% para GND, 10,0% e 6,6% para C, 8,5% e 4,8 % para P e 10,9% e 5,0% para M.ABSTRACT - The objectives of this study were to obtain adjustment factors for effects of calf age, dam age and calf Julian birth date on weight gain from birth to weaning (GND and on visual scores of conformation (C, precocity (P, and muscling (M and to estimate effects of maternal and individual heterosis on those traits. The analyzed records were from two breeding programs named Natura and Conexão Delta G, totalizing 187,610 purebred and crossbred Nellore x Angus and Nellore x Hereford calves. Calves were born between 1989 and 1999 in herds located in different states of Brazil. The statistical models applied to analyze GND and visual scores of

  8. Enceladus Results

    Data.gov (United States)

    National Aeronautics and Space Administration — Here are some results from the Spectra Decomposition Algorithm on infrared spectral images of Saturn's moon Enceladus. Figure 1 is the spatial contribution of the...

  9. 1998 results

    International Nuclear Information System (INIS)

    Gadonneix, P.

    1998-01-01

    This document presents the financial and commercial results of Gaz de France (GdF) company for 1998. The following points are presented successively: financial results (budget results, turnover, self-financing capacity, investments, debt situation), commercial results (some remarkable numbers and records, the tertiary and residential market, the industrial market, cogeneration and natural gas for vehicles), the strategy, 1998 realizations and perspectives (the natural gas energy in the 21. century, the development of GdF, the gas distribution and services (development of the French distribution system, export of the know-how, development of services), the transportation and storage systems threw Europe (densification of the pipeline network, the key-position of France, the north-south equilibrium of the distribution network), the natural gas production by GdF, the diversification of supplies, and the main daughter companies abroad). (J.S.)

  10. Research Results

    Science.gov (United States)

    2011-12-01

    Research on Global Carbon Emission and Sequestration NSFC Funded Project Made Significant Progress in Quantum Dynamics Functional Human Blood Protein Obtained from Rice How Giant Pandas Thrive on a Bamboo Diet New Evidence of Interpersonal Violence from 129,000 Years Ago Found in China Aptamer-Mediated Efficient Capture and Release of T Lymphocytes on Nanostructured Surfaces BGI Study Results on Resequencing 50 Accessions of Rice Cast New Light on Molecular Breeding BGI Reports Study Results on Frequent Mutation of Genes Encoding UMPP Components in Kidney Cancer Research on Habitat Shift Promoting Species Diversification

  11. Heterosis and combining ability for grain yield and yield component ...

    African Journals Online (AJOL)

    ... ranged from 0 to -13% indicating that the hybrids tend to be earlier in maturity than the parents. The mean squares due to GCA for days to maturity, ear diameter, member of kernels per row, 1000 kernel weight and grain yield were significant, indicating the importance of additive genetic variance in controlling these traits.

  12. The progress of intersubgenomic heterosis studies in Brassica napus

    African Journals Online (AJOL)

    The new nomenclature of Brassica has been suggested in a previous study by same authours where the symbols of Ar, Aj and An represented the A genome in the Brassica rapa, Brassica juncea and Brassica napus, Bb, Bj and Bc for the B genome of Brassica nigra (black mustard), B. juncea and Brassica carinata, Co, Cn ...

  13. Heterosis of Qualitative and Quantitative Characters in Sweet Gourd ...

    African Journals Online (AJOL)

    The heterotic effects and genetic components of variation for qualitative and quantitative characters were estimated in sweet gourd. The phenotypic coefficients of variation were higher than genotypic coefficient of variation for all the characters indicating that environment played a considerable role on the expression of ...

  14. Estimation of heterosis for yield and quality components in chilli ...

    African Journals Online (AJOL)

    Ten genotypes including five lines (Kashi Anmol, Pant C-1, Japani Longi, Kashi Sinduri and Pusa Jwala) and five testers (R-Line, VR-339, AKC-89/38, DC-16 and Punjab Lal) of chilli were crossed to derive 25 F1 hybrids. The 35 genotypes (10 parents and 25 F1 hybrids) were evaluated for yield and quality (capsaicin and ...

  15. Estimation of heterosis for yield and quality components in chilli ...

    African Journals Online (AJOL)

    Shashank

    2013-11-20

    Nov 20, 2013 ... Ten genotypes including five lines (Kashi Anmol, Pant C-1, Japani Longi, Kashi Sinduri and Pusa Jwala) and five testers (R-Line, VR-339, AKC-89/38, DC-16 and Punjab Lal) of chilli were crossed to derive 25 F1 hybrids. The 35 genotypes (10 parents and 25 F1 hybrids) were evaluated for yield and quality ...

  16. Cottonseed oil and yield assessment via economic heterosis and ...

    African Journals Online (AJOL)

    user

    2010-11-01

    , 09100 Aydin, Turkey. 3Department of Weed Science, Khyber Pakhtunkhwa Agricultural University, Peshawar 25130, Pakistan. Accepted 3 September, 2010. Due to the difficulty in producing cotton F1 hybrid seed through ...

  17. The progress of intersubgenomic heterosis studies in Brassica napus

    African Journals Online (AJOL)

    ONOS

    2010-03-15

    Mar 15, 2010 ... China (Fan and Stefansson, 1986; Downey and. Röbbelen, 1989; Fu, 2000). Lots of research revealed ... THE CONCEPT OF SUBGENOME OF BRASSICA. Long years of evolution and artificial selection have ... To distinguish the difference, the concept of subgenome was introduced to genus Brassicas.

  18. Heterosis: Hybrid Teaching and Learning Methods in Sabar Drumming

    Science.gov (United States)

    McGraw, Matthew Neil

    2010-01-01

    Many American university percussion students in the early 21st Century are expected to have performance abilities in genres outside of the Western percussion tradition. With the increase in ethnomusicology programs and the active hiring of teachers with non-Western musical capabilities, many universities now offer multiple options for performance…

  19. Another explanation for the cause of heterosis phenomenon

    Indian Academy of Sciences (India)

    homozygous loci and therefore the hybrids are superior to ... heterozygous loci. The dominance theory (Bruce 1910; Jones 1917) proposed that each of the parents contain deleterious recessive alle- les in several loci, whereas in the hybrids these deleteri- ous are ... caused by the absence of one of the gene that control the.

  20. Combining ability and heterosis for phenologic and agronomic traits ...

    African Journals Online (AJOL)

    SAM

    2014-06-11

    Jun 11, 2014 ... Five International Institute of Tropical Agriculture (IITA) drought tolerant and open pollinated varieties. (OPVs) (lines) and four local varieties with various level of susceptibility to drought (testers) were used. These maize varieties were crossed using a line x tester mating design during the 2007 cropping ...

  1. Heterosis and heritability estimates of purine alkaloids and ...

    African Journals Online (AJOL)

    Cocoa (Theobroma cacao L.) is an important allogamous tropical tree crop, whose centre of diversity is considered to be in Central America. Dry cocoa beans from five cocoa clones, and their intercrossed hybrids were analysed based on the variation of alkaloids and polyphenolic compounds contents, in order to gain ...

  2. Another explanation for the cause of heterosis phenomenon

    Indian Academy of Sciences (India)

    by self-pollination and cross-pollination reveals that self-pollinating plants of natural cross-pollinating leads to the decrease in individual genetic diversity of offspring and crossing between pure lines .... the presentation above, there are two ways of explaining the segregation of rate 3 : 1 in the experiment of Mendel. I do not.

  3. Cholesterol testing and results

    Science.gov (United States)

    Cholesterol test results; LDL test results; VLDL test results; HDL test results; Coronary risk profile results; Hyperlipidemia-results; Lipid disorder test results; Heart disease - cholesterol results

  4. EPIC Results from ALICE

    CERN Document Server

    Harris, John W

    2012-01-01

    An overview is presented of the recent heavy ion results from the ALICE experiment at the Large Hadron Collider. These new results are placed in perspective with those from the Relativistic Heavy Ion Collider experiments.

  5. Total 2004 results

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-02-01

    This document presents the 2004 results of Total Group: consolidated account, special items, number of shares, market environment, adjustment for amortization of Sanofi-Aventis merger-related intangibles, 4. quarter 2004 results (operating and net incomes, cash flow), upstream (results, production, reserves, recent highlights), downstream (results, refinery throughput, recent highlights), chemicals (results, recent highlights), Total's full year 2004 results (operating and net income, cash flow), 2005 sensitivities, Total SA parent company accounts and proposed dividend, adoption of IFRS accounting, summary and outlook, main operating information by segment for the 4. quarter and full year 2004: upstream (combined liquids and gas production by region, liquids production by region, gas production by region), downstream (refined product sales by region, chemicals), Total financial statements: consolidated statement of income, consolidated balance sheet (assets, liabilities and shareholder's equity), consolidated statements of cash flows, business segments information. (J.S.)

  6. Total 2004 results

    International Nuclear Information System (INIS)

    2005-02-01

    This document presents the 2004 results of Total Group: consolidated account, special items, number of shares, market environment, adjustment for amortization of Sanofi-Aventis merger-related intangibles, 4. quarter 2004 results (operating and net incomes, cash flow), upstream (results, production, reserves, recent highlights), downstream (results, refinery throughput, recent highlights), chemicals (results, recent highlights), Total's full year 2004 results (operating and net income, cash flow), 2005 sensitivities, Total SA parent company accounts and proposed dividend, adoption of IFRS accounting, summary and outlook, main operating information by segment for the 4. quarter and full year 2004: upstream (combined liquids and gas production by region, liquids production by region, gas production by region), downstream (refined product sales by region, chemicals), Total financial statements: consolidated statement of income, consolidated balance sheet (assets, liabilities and shareholder's equity), consolidated statements of cash flows, business segments information. (J.S.)

  7. The Arising of Results

    DEFF Research Database (Denmark)

    Sobisch, Jan-Ulrich

    2013-01-01

    Some Buddhist scholars have periodized the expected lifetime of the Buddha's teachings. According to them, these periods of 500 years each have different characteristics. The first is called 'the period of the results'. Therefore some scholars have claimed that only in the first 500 years after...... the Buddha results can arise. Kyobpa Jigten Sumgön has argued that results arise through practise as long as Dharma and Sangha exist....

  8. Results from SAGE

    Energy Technology Data Exchange (ETDEWEB)

    Vermul, V.M.; Abdurashitov, J.N.; Bowles, T.J.; Cherry, M.L.; Cleveland, B.T.; Davis, R.; Elliott, S.R.; Gavrin, V.N.; Girin, S.V.; Gorbachev, V.V.; Ibragimova, T.V.; Kalikhov, A.V.; Khairnasov, N.G.; Knodel, T.V.; Lande, K.; Mirmov, I.N.; Nico, J.S.; Shikhin, A.A.; Teasdale, W.A.; Veretenkin, E.P.; Wark, D.L.; Wildenhain, P.S.; Wilkerson, J.F.; Yants, V.E.; Zatsepin, G.T

    2002-07-01

    We report the results of 11 years of solar neutrino observation by the Russian-American Gallium solar neutrino Experiment (SAGE). The overall result of 84 runs during the measurement period January 1990 through March 2001 is 75.6 +5.9/-5.8 (stat.) +3.5/-3.0 (syst.) SNU. This represents only slightly more than half of the predicted standard solar model rate of 129 SNU. The individual results of each run, as well as the results of combined analysis of all runs are presented.

  9. Results from SAGE

    CERN Document Server

    Vermul, V M; Bowles, T J; Cherry, M L; Cleveland, B T; Davis, R; Elliott, S R; Gavrin, V N; Girin, S V; Gorbachev, V V; Ibragimova, T V; Kalikhov, A V; Khairnasov, N G; Knodel, T V; Lande, K; Mirmov, I N; Nico, J S; Shikhin, A A; Teasdale, W A; Veretenkin, E P; Vermul, V M; Wark, D L; Wildenhain, P S; Wilkerson, J F; Yants, V E; Zatsepin, G T

    2002-01-01

    We report the results of 11 years of solar neutrino observation by the Russian-American Gallium solar neutrino Experiment (SAGE). The overall result of 84 runs during the measurement period January 1990 through March 2001 is 75.6 +5.9/-5.8 (stat.) +3.5/-3.0 (syst.) SNU. This represents only slightly more than half of the predicted standard solar model rate of 129 SNU. The individual results of each run, as well as the results of combined analysis of all runs are presented.

  10. Results from OPERA

    International Nuclear Information System (INIS)

    Nakamura, Mitsuhiro

    2013-01-01

    In this report, the details of new ν τ event detected by OPERA were reported. Also first result on ν μ to ν e oscillation search in OPERA was described. The result excluded the high Δm 2 region down to sin 2 2θ 13 ∼2×10 −2

  11. Recent results from TASSO

    International Nuclear Information System (INIS)

    Foster, B.

    1982-03-01

    Results are presented on the inclusive production of π 0 , K 0 and antiK 0 and lambda and antilambda in e + e - annihilation. These results, together with those on inclusive charged hadron production are used to obtain information on fragmentation mechanisms and the production of heavy quark flavours in e + e - annihilation. (author)

  12. Recent results from TRISTAN

    Energy Technology Data Exchange (ETDEWEB)

    Enomoto, Ryoji [National Laboratory for High Energy Physics, Ibaraki (Japan)

    1997-01-01

    TRISTAN results on {gamma}{gamma} physics from 1994 to 1995 are reviewed in this report. We have systematically investigated jet production, the {gamma}-structure function, and charm pair production in {gamma}{gamma} processes. The results are discussed, and future prospects are presented.

  13. Annual results 2004

    International Nuclear Information System (INIS)

    2005-01-01

    This 2004 annual evaluation of the french RTE company (electric power transport network) provides information on the 2004 results on: institutional information, financial results, customers and market, industrial resources, environment and consultation, human resources and international aspects. (A.L.B.)

  14. Tevatron physics results

    CERN Multimedia

    CERN. Geneva

    2007-01-01

    I will summarize the physics results from the Tevatron experiments with particular emphasis on the experimental methods used in different kinds of analysis. In particular, the Tevatron is a proton-antiproton collider that has now accumulated more than 2 fb^-1 of luminosity in the two experiments, called CDF and D0. In this lecture I will review the results on inclusive productions of jets, W- and Z-bosons, the results in the flavor sector, the measurements of top production, searches for Higgs boson production and searches for physics beyond the Standard Model. In each case I will explain the basic experimental concepts and methods needed for making the measurement.

  15. Unfavourable results in hypospadias

    Directory of Open Access Journals (Sweden)

    Karoon Agrawal

    2013-01-01

    Full Text Available Hypospadias urethroplasty is considered difficult as the complications and unfavourable results are not uncommon. At the turn of the century, due to a better understanding of applied anatomy of hypospadias, new techniques were developed which significantly brought down the complication rate. However unfavourable results are still disturbing. An algorithm for selection of surgery has been presented. Forty three secondary surgeries were performed over 3 years for correction of unfavourable results. The urethrocutaneous fistula was the most common (21% followed by meatal stenosis (14% and narrow neourethra (14%. Common unfavourable results have been discussed. On the basis of experience with a large number of hypospadias urethroplasty ′tips to avoid or minimise unfavourable results′ have been presented. However, one should assess the final outcome of urethroplasty using hypospadias objective scoring evaluation.

  16. ATLAS soft QCD results

    CERN Document Server

    Sykora, Tomas; The ATLAS collaboration

    2018-01-01

    Recent results of soft QCD measurements performed by the ATLAS collaboration are reported. The measurements include total, elastic and inelastic cross sections, inclusive spectra, underlying event and particle correlations in p-p and p-Pb collisions.

  17. Atmospheric Deposition Modeling Results

    Data.gov (United States)

    U.S. Environmental Protection Agency — This asset provides data on model results for dry and total deposition of sulfur, nitrogen and base cation species. Components include deposition velocities, dry...

  18. Transacsys PLC - Final Results

    CERN Multimedia

    2002-01-01

    Final results from Transacsys PLC. A subsidary of this company was set up to develop the CERN EDH system into a commercial product but incurred too much financial loss so the project was cancelled (1/2 page).

  19. Haiti DevResults

    Data.gov (United States)

    US Agency for International Development — DevResults is a web-based portfolio management system that tracks program data for the Haiti Mission that was awarded in April of 2013. (The Mozambique and/or...

  20. Arsenic speciation results

    Data.gov (United States)

    U.S. Environmental Protection Agency — Linear combination fitting results of synchrotron data to determine arsenic speciation in soil samples. This dataset is associated with the following publication:...

  1. Compilation of results 1987

    International Nuclear Information System (INIS)

    1987-01-01

    A compilation is carried out which in concentrated form presents reports on research and development within the nuclear energy field covering a two and a half years period. The foregoing report was edited in December 1984. The projects are presendted with title, project number, responsible unit, person to contact and short result reports. The result reports consist of short summaries over each project. (L.F.)

  2. Higgs results from ATLAS

    Directory of Open Access Journals (Sweden)

    Chen Xin

    2016-01-01

    Full Text Available The updated Higgs measurements in various search channels with ATLAS Run 1 data are reviewed. Both the Standard Model (SM Higgs results, such as H → γγ, ZZ, WW, ττ, μμ, bb̄, and Beyond Standard Model (BSM results, such as the charged Higgs, Higgs invisible decay and tensor couplings, are summarized. Prospects for future Higgs searches are briefly discussed.

  3. Higgs results from ATLAS

    CERN Document Server

    AUTHOR|(INSPIRE)INSPIRE-00145153; The ATLAS collaboration

    2015-01-01

    The updated Higgs measurements in various search channels with ATLAS Run 1 data are reviewed. Both the Standard Model (SM) Higgs results, such as $H\\to\\gamma\\gamma,ZZ,WW,\\tau\\tau,\\mu\\mu,b\\bar{b}$, and Beyond Standard Model (BSM) results, such as the charged Higgs, Higgs invisible decay and tensor couplings, are summarized. Prospects for future Higgs searches are briefly discussed.

  4. Unfavorable results in replantation

    Directory of Open Access Journals (Sweden)

    Abraham G Thomas

    2013-01-01

    Full Text Available Reattachment of amputated parts of the body (Replantation has become a reality since the first arm replant was carried out six decades ago. Failures were not uncommon in the beginning, leading on to the analysis of the problem and refinements in technique. Improvements in sutures, instrumentation and better microscopes further helped the surgeons to do replantation with better finesse and functional results. Evaluation of results and particularly failure and long term results help the younger surgeons to learn from the difficulties faced earlier to do better in the future. An attempt is made to list various aspects of replantation experienced by the author during the past 30 years, particularly in reference to unfavorable results, which had been occasionally total failure, or a partial failure, with poor function and cosmesis due to infection. An insensate limb with poor function is the result of inadequate or improper nerve coaptation or infection destroying the whole repair. It is apt to mention that infection is mostly the result of poor vascularity due to devitalized tissue. Difficulties arise often in identifying the viable tissue, particularly while debriding in the distal amputated part since there is no bleeding. Experience counts in this, specifically to identify the viable muscle. The factors that may lead to complications are listed with remarks to avoid them.

  5. Total 2003 Results

    International Nuclear Information System (INIS)

    2003-01-01

    This document presents the 2003 results of Total Group: consolidated account, special items, number of shares, market environment, 4. quarter 2003 results, full year 2003 results, upstream (key figures, proved reserves), downstream key figures, chemicals key figures, parent company accounts and proposed dividends, 2004 sensitivities, summary and outlook, operating information by segment for the 4. quarter and full year 2003: upstream (combined liquids and gas production by region, liquids production by region, gas production by region), downstream (refinery throughput by region, refined product sales by region, chemicals), impact of allocating contribution of Cepsa to net operating income by business segment: equity in income (loss) and affiliates and other items, Total financial statements: consolidated statement of income, consolidated balance sheet (assets, liabilities and shareholder's equity), consolidated statements of cash flows, business segments information. (J.S.)

  6. Results from EQAS 2002

    DEFF Research Database (Denmark)

    Petersen, A.; Aarestrup, Frank Møller; Jensen, A.B.

    An international external quality assurance program on serotyping and antimicrobial susceptibility testing of eight Salmonella enterica strains was performed to enhance the capacity of national and regional reference laboratories in WHO Global Salm-Surv (WHO GSS). In 2002 a total of 117 laborator......An international external quality assurance program on serotyping and antimicrobial susceptibility testing of eight Salmonella enterica strains was performed to enhance the capacity of national and regional reference laboratories in WHO Global Salm-Surv (WHO GSS). In 2002 a total of 117...... laboratories from 67 countries participated. For serotyping, almost 90 % of the results were correct. For susceptibility testing, 91 % of the results were in agreement with the expected results, and 86 % of the performed tests with the reference strain E. coli ATCC 25922 were inside the quality control range...

  7. RTE - 2012 financial results

    International Nuclear Information System (INIS)

    Ricour, Olivia; Marguier, Marina; Lartigau, Thierry

    2013-01-01

    The mission of RTE, the French electricity Transportation grid, a public service assignment, is to balance the electricity supply and demand in real time. This report presents RTE's financial results for 2012: increase of investments for services to clients, performance results, financial balance, stability of the economical model. RTE's regulated economical model, main financial indicators, 2007-2012 investments, 2012 investments by category, 2012 turnover, 2012 costs structure, taxes, financial balance sheet at the end of 2012, and the share of electricity transport in the electricity price are presented in appendixes

  8. Recent results from Gargamelle

    International Nuclear Information System (INIS)

    Musset, P.

    1980-01-01

    Following a brief summary of the main results from recent neutrino experiments, recent results from Gargamelle, including experimental design, a description of the leptonic neuutral current reaction, signal corrections and calculations of the neutral current elastic reaction rate, are presented. Decay rates of charmed particles were also studied. A μ - μ - background signal is identified and a genuine μ + μ - signal of 30 + or - 8 events found. Only indirect evidence for the production of charmed particles produced in the hadronic reaction is found. Experimental designs and their constraints are discussed

  9. Results from Adone

    CERN Document Server

    Celio, R B

    1979-01-01

    A short review on recent experimental results obtained at Adone, on multihadronic e/sup +/e/sup -/ annihilation is given. Results and comments concern: R values, compared with QCD and EVMD predictions, charged and neutral multiplicities, threshold for 'energy crisis', G parities and SU/sub 3/ checks, sigma (2 pi /sup +/2 pi /sup -/); evidence for a large rho "(1600), sigma ( pi /sup +/ pi /sup -/2 pi degrees ); non evidence for a rho '(1250), and sigma (2 pi /sup +/2 pi /sup -/2 pi degrees ); evidence and interpretation of 1820. (8 refs).

  10. Results from PLUTO

    International Nuclear Information System (INIS)

    Knies, G.

    1977-11-01

    Results obtained by the PLUTO collaboration from the 1976 data taking period at the electron-positron storage ring DORIS are presented. We report results on the total e + e - annihilation cross section, on inclusive measurements, on three new decay modes of the J/psi, and on various aspects of the heavy lepton tau. Among these there is an upper limit on the tau lifetime and the first evidence for the possible decay tau → upsilonA 1 . (orig./JS) [de

  11. [The applicability of results].

    Science.gov (United States)

    Marín-León, I

    2015-11-01

    The ultimate aim of the critical reading of medical literature is to use the scientific advances in clinical practice or for innovation. This requires an evaluation of the applicability of the results of the studies that have been published, which begins with a clear understanding of these results. When the studies do not provide sufficient guarantees of rigor in design and analysis, the conditions necessary for the applicability of the results are not met; however, the fact that the results are reliable is not enough to make it worth trying to use their conclusions. This article explains how carrying out studies in experimental or artificial conditions often moves them away from the real conditions in which they claim to apply their conclusions. To evaluate this applicability, the article proposes evaluating a set of items that will enable the reader to determine the likelihood that the benefits and risks reported in the studies will yield the least uncertainty in the clinical arena where they aim to be applied. Copyright © 2015 SERAM. Published by Elsevier España, S.L.U. All rights reserved.

  12. Same query - different results

    International Nuclear Information System (INIS)

    Nevyjel, A.

    1983-10-01

    On behalf of a case study a simple truncated adjacency phrase search was executed in the online versions of Chemical Abstracts on five different host computers (DATA-STAR, DIALOG, ESA, SDC, TELESYSTEMES). The reasons for the differences in the appearing results are discussed. (Author) [de

  13. Jet results from CDF

    International Nuclear Information System (INIS)

    Wainer, N.

    1991-05-01

    Recent results from CDF in jet physics are presented. Tests of leading order and next to leading order QCD are performed by measuring the dijet invariant mass spectrum, jet shapes and three jet events. Tests the leading logarithm, approximation in QCD are made by comparing the high energy events at CDF with the Herwig Monte Carlo. 10 refs., 7 figs

  14. Recent results from LEP

    Indian Academy of Sciences (India)

    The major goals of LEP2 are precision measurement of the mass and width of theW boson and search for new particles such as ... Recent results from LEP. Selection strategy: • Exclude hadronic events using multiplicity. • Identify 2 leptons (e, μ, tagging as at LEP I). • Apply selection cuts on. – acoplanarity angle between the ...

  15. Roadmap of Infinite Results

    DEFF Research Database (Denmark)

    Srba, Jiří

    2002-01-01

    This paper provides a comprehensive summary of equivalence checking results for infinite-state systems. References to the relevant papers will be updated continuously according to the development in the area. The most recent version of this document is available from the web-page http://www.brics.dk/~srba/roadmap....

  16. Management Values Survey Results.

    Science.gov (United States)

    Duffy, Barbara; Payne, Ron

    1988-01-01

    Describes results of a survey conducted to compare values of members of the Association for Educational Communications and Technology (AECT) with managers in business and industry. Issues discussed include job satisfaction, opportunities for advancement, attitudes toward management, and salary; a summary of each value system is provided. (LRW)

  17. Recent results from LEP

    Indian Academy of Sciences (India)

    Recent results from the LEP collider at CERN are presented: on the identification of +- → +- and the determination of the mass and width and limits on its anomalous couplings; the search for the Standard Model and non-minimal Higgs; search for SUSY and other new particles. Fits to all electroweak data leading to ...

  18. First AFP results

    CERN Document Server

    Staszewski, Rafal; The ATLAS collaboration

    2017-01-01

    ATLAS Forward Proton (AFP) are detectors dedicated to measurements of protons scattered diffractively or electromagnetically at small angles in inelastic processes. The first arm of AFP was installed in 2016. The installation of the full system was finished in 2017. Since 2016 AFP has collected data is special and standard runs. The presentation shows the first results obtained with data collected by AFP.

  19. RTE annual results 2005

    International Nuclear Information System (INIS)

    2006-01-01

    This annual report presents the results of the RTE (Electric power Transport Network). The year 2005 is marked by the new status of RTE, as a limited company. The financial good performances, the market, the open network, the environmental policy, the human resources and the european and international relations are discussed. (A.L.B.)

  20. Recent results of BABAR

    International Nuclear Information System (INIS)

    Bernard, D.

    2001-01-01

    The BABAR detector at SLAC's PEP-II storage ring has collected data amounting to about 30.4 fb -1 until june 2001. Results on CP violation, and in particular search for direct CP violation, and measurement of rare B decays are presented

  1. First results at GSI

    International Nuclear Information System (INIS)

    Bock, R.

    1977-01-01

    UNILAC, and accelerator for heavy ions up to uranium with energies up to 10 MeV/nucleon became operational January 1976. A report is given on results so far in various fields of heavy ion physics, in particular on search for new nuclides, deep-inelastic collisions, spectroscopy of high-spin states and some selected topics of atomic physics. (orig.) [de

  2. Latest results from HERA

    Indian Academy of Sciences (India)

    In this paper only a few of the many results from the HERA experiments are discussed. They have been chosen to give a flavour of the full scope of physics topics that are explored in high energy electron proton scattering. In the first section the measurements on the proton structure function F¾ are presented and interpreted ...

  3. Neutrino mass: Recent results

    International Nuclear Information System (INIS)

    Robertson, R.G.H.

    1989-01-01

    Some recent developments in the experimental search for neutrino mass are discussed. Simpson and Hime report finding new evidence for a 17-keV neutrino in the β decay of 3 H and 35 S. New data from Los Alamos on the electron neutrino mass as measured in tritium beta decay give an upper limit of 13.5 eV at the 95% confidence level. This result is not consistent with the long-standing ITEP result of 26(5) eV within a ''model-independent'' range of 17 to 40 eV. It now appears that the electron neutrino is not sufficiently massive to close the universe by itself. 38 refs., 1 figs., 2 tabs

  4. Results from LEP

    International Nuclear Information System (INIS)

    Pohl, M.

    1995-01-01

    Selected results from LEP on electroweak neutral currents and strong interactions are reviewed. In the first part, total cross sections, angular and polarization symmetries are interpreted in terms of basic electroweak parameters, like the mass, total and partial widths of the Z and neutral current couplings. Special attention is given to two apparent problems: the discrepancy between the measurements with final state vs. initial state polarization; and the deviation of the measured width of the Z into heavy quarks from Standard Model expectations. These discrepancies are not very significant, but they are the only ones observed at this point and thus deserve attention. In the second part, I outline results on final state strong interactions, namely measurements pertaining to differences between quark and gluon jets and the QCD group structure. (author) 19 figs., 4 tabs., 21 refs

  5. Solar results purchasing

    International Nuclear Information System (INIS)

    Sanders, J.

    2001-01-01

    Solar Thermal water heating has made little market penetration in some European countries. The main barriers to market development are: Long payback periods for the technology; Difficulties for the end-user in meeting the initial capital costs of the installation; Lack of confidence in the delivered energy that can be expected from the technology. The third barrier has been addressed using the concept of Guaranteed Solar Results (GSR). This project has addressed the other two main barriers using the concept of Solar Results Purchasing, (SRP) which combines GSR with Third Party Financing. The work was carried out in the UK, France, and Spain. The project used a uniform approach across the three countries. Each team calculated solar performance using an English version of the SOLO programme developed by TECSOL in France to encode the methodology for GSR model contracts. (author)

  6. Envirhom: stakes and results

    International Nuclear Information System (INIS)

    2006-01-01

    After a recall of the evolution of the international system for the protection against ionizing radiations, this report discusses the evolution of a new societal context (evolution of risk perception, concern about accidental situations). It also discusses the emerging scientific issues and challenges regarding the knowledge about biological and health effects of ionizing radiations, which requires investigations on the ecosystems, the effects of chronic low level exposures, and the propagation of effects at different biological levels (cells, tissue, individual, population, communities, and ecosystems). Then, it presents the IRSN environment-health research program, ENVIRHOM, its objectives, and its results concerning the environment on the one side, and health on the other side. The 'environment' side and the 'health' side of this program are then more precisely presented as well as their results

  7. Traceability of measurement results.

    Science.gov (United States)

    Koumantakis, George

    2008-08-01

    * Trueness must be independent of analytical platform and measurements comparable regardless of the analytical procedure used. * Traceability requirements for the clinical laboratory are via National Metrology Institutes, Reference (Calibration) laboratories and finally the routine laboratory. * Traceability information required by today's clinical laboratory may be requested from the manufacturer of the analytical kits and the internet. * Traceable laboratory results will greatly enhance the role of the laboratory in patient management.

  8. Assessing ultrasonic examination results

    International Nuclear Information System (INIS)

    Deutsch, V.; Vogt, M.

    1977-01-01

    Amongst nondestructive examination methods, the ultrasonic examination plays an important role. The reason why its scope of application is so wide is because the sound conducting capacity is the only property the material of a test specimen has to have. As the fields are so manifold, only main aspects can be described briefly. The list of references, however, is very extensive and gives plenty of information of all the problems concerning the assessment of ultrasonic examination results. (orig./RW) [de

  9. Statistical mechanics rigorous results

    CERN Document Server

    Ruelle, David

    1999-01-01

    This classic book marks the beginning of an era of vigorous mathematical progress in equilibrium statistical mechanics. Its treatment of the infinite system limit has not been superseded, and the discussion of thermodynamic functions and states remains basic for more recent work. The conceptual foundation provided by the Rigorous Results remains invaluable for the study of the spectacular developments of statistical mechanics in the second half of the 20th century.

  10. Recent results from LHCb

    CERN Document Server

    Oblakowska-Mucha, A

    2016-01-01

    The LHCb detector is a single-arm forward spectrometer that collects data at the LHC. In this review, a few of recent results in the field of $b$-hadron decays performed by the LHCb Collaboration are presented. The analyses use proton-proton collision data corresponding to 3 fb$^{-1}$ collected by the LHCb detector during 2011 and 2012 physics runs with the center-of-mass energies of 7 and 8 TeV.

  11. Pressure locking test results

    International Nuclear Information System (INIS)

    DeWall, K.G.; Watkins, J.C.; McKellar, M.G.; Bramwell, D.

    1996-01-01

    The U.S. Nuclear Regulatory Commission (NRC), Office of Nuclear Regulatory Research, is funding the Idaho National Engineering Laboratory (INEL) in performing research to provide technical input for their use in evaluating responses to Generic Letter 95-07, open-quotes Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves.close quotes Pressure locking and thermal binding are phenomena that make a closed gate valve difficult to open. This paper discusses only the pressure locking phenomenon in a flexible-wedge gate valve; we will publish the results of our thermal binding research at a later date. Pressure locking can occur when operating sequences or temperature changes cause the pressure of the fluid in the bonnet (and, in most valves, between the discs) to be higher than the pressure on the upstream and downstream sides of the disc assembly. This high fluid pressure presses the discs against both seats, making the disc assembly harder to unseat than anticipated by the typical design calculations, which generally consider friction at only one of the two disc/seat interfaces. The high pressure of the bonnet fluid also changes the pressure distribution around the disc in a way that can further contribute to the unseating load. If the combined loads associated with pressure locking are very high, the actuator might not have the capacity to open the valve. The results of the NRC/INEL research discussed in this paper show that the relationship between bonnet pressure and pressure locking stem loads appears linear. The results also show that for this valve, seat leakage affects the bonnet pressurization rate when the valve is subjected to thermally induced pressure locking conditions

  12. Pressure locking test results

    Energy Technology Data Exchange (ETDEWEB)

    DeWall, K.G.; Watkins, J.C.; McKellar, M.G.; Bramwell, D. [Idaho National Engineering Lab., Idaho Falls, ID (United States)] [and others

    1996-12-01

    The U.S. Nuclear Regulatory Commission (NRC), Office of Nuclear Regulatory Research, is funding the Idaho National Engineering Laboratory (INEL) in performing research to provide technical input for their use in evaluating responses to Generic Letter 95-07, {open_quotes}Pressure Locking and Thermal Binding of Safety-Related Power-Operated Gate Valves.{close_quotes} Pressure locking and thermal binding are phenomena that make a closed gate valve difficult to open. This paper discusses only the pressure locking phenomenon in a flexible-wedge gate valve; the authors will publish the results of their thermal binding research at a later date. Pressure locking can occur when operating sequences or temperature changes cause the pressure of the fluid in the bonnet (and, in most valves, between the discs) to be higher than the pressure on the upstream and downstream sides of the disc assembly. This high fluid pressure presses the discs against both seats, making the disc assembly harder to unseat than anticipated by the typical design calculations, which generally consider friction at only one of the two disc/seat interfaces. The high pressure of the bonnet fluid also changes the pressure distribution around the disc in a way that can further contribute to the unseating load. If the combined loads associated with pressure locking are very high, the actuator might not have the capacity to open the valve. The results of the NRC/INEL research discussed in this paper show that the relationship between bonnet pressure and pressure locking stem loads appears linear. The results also show that for this valve, seat leakage affects the bonnet pressurization rate when the valve is subjected to thermally induced pressure locking conditions.

  13. Consort 3 results

    Science.gov (United States)

    Wessling, Francis C.; Maybee, George W.

    1994-01-01

    Twelve experiments designed to obtain samples and data for a variety of microgravity materials processing investigations were carried on Consort 3, a sounding rocket flight. The overall purpose of the flight was to provide an opportunity to investigate the effects of microgravity on processes with potential for new technology development and commercial applications. The range of experimentation included investigations of immiscible polymer demixing rates, electrodeposition and electrocodeposition, elastomer-modified epoxy resins, foam formation, a number of biomaterial mixing processes, and polymer thin-film formation. Specific objectives and results are summarized for each experiment.

  14. Results from PAMELA

    International Nuclear Information System (INIS)

    Mocchiutti, E.; Adriani, O.; Barbarino, G.C.; Bazilevskaya, G.A.; Bellotti, R.; Boezio, M.; Bogomolov, E.A.; Bonechi, L.; Bongi, M.; Bonvicini, V.; Borisov, S.; Bottai, S.; Bruno, A.; Cafagna, F.; Campana, D.

    2011-01-01

    The PAMELA satellite experiment was launched into low earth orbit on June 15th 2006. The combination of a permanent magnet silicon strip spectrometer and a silicon-tungsten imaging calorimeter allows precision studies of the charged cosmic radiation to be conducted over a wide energy range (100 MeV - several hundred GeV). A primary scientific goal is to search for dark matter particle annihilation by measuring the energy spectra of cosmic ray antiparticles. Latest results from the PAMELA experiment are presented with a particular focus on cosmic ray antiprotons and positrons.

  15. NAUTILUS recent results

    Science.gov (United States)

    Fafone, V.; Astone, P.; Bassan, M.; Bonifazi, P.; Carelli, P.; Coccia, E.; D'Antonio, S.; Federici, G.; Marini, A.; Minenkov, Y.; Modena, I.; Modestino, G.; Moleti, A.; Pallottino, G. V.; Pizzella, G.; Quintieri, L.; Rocchi, A.; Ronga, F.; Terenzi, R.; Visco, M.; Votano, L.

    The resonant-mass gravitational wave detector NAUTILUS, operated by the ROG collaboration at the INFN Frascati National Laboratories, is in continuous data taking since June 1998 with peak sensitivity of h ~= 3×10-22Hz-1/2. It has recently proven to be capable of recording signals due to the passage of cosmic rays. The results of the latest coincidence analyses between the NAUTILUS data and the cosmic ray signals measured by detectors located above and below NAUTILUS are reported.

  16. New results from CERES

    CERN Document Server

    Adamova, D; Appelshäuser, H; Belaga, V V; Braun-Munzinger, P; Cherlin, A; Damjanovic, S; Dietel, T; Dietrich, L; Drees, A; Esumi, S C; Filimonov, K; Fomenko, K; Fraenkel, Zeev; Garabatos, C; Glässel, P; Hering, G; Holender, J M; Kushpil, V; Lenkeit, B C; Maas, A; Marin, A; Messer, F; Milosevic, J; Milov, A; Miskowiec, D; Panebratsev, Yu A; Petchenova, O Yu; Petracek, V; Pfeiffer, A; Rak, J; Ravinovich, I; Rehak, P; Sako, H; Schmitz, W; Schükraft, Jürgen; Sedykh, S N; Seipp, W; Shimansky, S S; Slivova, J; Specht, H J; Stachel, J; Sumbera, M; Tilsner, H; Tserruya, Itzhak; Wessels, J P; Wienold, T; Windelband, B; Wurm, J P; Xie, W; Yurevich, S; Yurevich, V I

    2002-01-01

    We will focus here on results from the 1999 data taking period, where 8 M Pb+Au events at 40 AGeV were recorded. Since the new readout system of the TPC was not yet properly working, this data set is limited in terms of statistics, and momentum resolution. Nevertheless, this data sample at lower beam energy allows to study initial conditions different from the ones at top SPS energy. This can be very useful to disentangle temperature and baryon density driven modifications of the dilepton spectrum. (15 refs).

  17. Results from AMANDA

    CERN Document Server

    Wiebusch, C; Bai, X; Barwick, S W; Becka, T; Becker, K H; Bertrand, D; Bernadini, E; Binon, Freddy G; Biron, A; Boser, S; Botner, O; Bouchta, A; Bouhali, O; Burgess, T; Carius, S; Castermans, T; Chen, A; Chirkin, D; Conrad, J; Cooley, J; Cowen, D F; Davour, A; De Clercq, C; De Young, T R; Desiati, P; Dewulf, J P; Doksus, P; Ekstrom, P; Feser, T; Gaisser, T K; Gaug, M; Gerhardt, L; Goldschmidt, A; Hallgren, A; Halzen, F; Hanson, K; Hardtke, R; Hauschildt, T; Hellwig, M; Herquet, P; Hill, G C; Hulth, P O; Hundertmark, S; Jacobsen, J; Karle, A; Koci, B; Köpke, L; Kowalski, M; Kühn, K; Lamoureux, J I; Leich, H; Leuthold, M J; Lindahl, P; Liubarsky, I; Madsen, J; Marciniewski, P; Matis, H S; McParland, C P; Minaeva, Y; Minocinovic, P; Mock, P C; Morse, R; Nahnhauer, R; Neunhoffer, T; Niessen, P; Nygren, D R; Ögelman, H B; Olbrechts, P; Pérez de los Heros, C; Pohl, A C; Price, P B; Przybylski, G T; Rawlins, K; Resconi, E; Rhode, W; Ribordy, M; Richter, S; Rodríguez-Martino, J; Ross, D; Sander, H G; Schmidt, T; Schneider, D; Schwarz, R; Silvestri, A; Solarz, M; Spiczak, G M; Spiering, C; Steele, D; Steffen, P; Stokstad, R G; Sudhoff, P; Sulanke, K H; Taboada, I; Thollander, L; Tilav, S; Walck, C; Weinheimer, C; Wiebusch, C; Wiedemann, C; Wischnewski, R; Wissing, H; Woschnagg, K; Yodh, G B; Young, S

    2002-01-01

    The Antarctic Muon and Neutrino Detector Array (AMANDA) is a high- energy neutrino telescope operating at the geographic South Pole. It is a lattice of photomultiplier tubes buried deep in the polar ice. The primary goal of this detector is to discover astrophysical sources of high energy neutrinos. We describe the detector methods of operation and present results from the AMANDA-B10 prototype. We demonstrate the improved sensitivity of the current AMANDA-II detector. We conclude with an outlook to the envisioned sensitivity of the future IceCube detector. (37 refs).

  18. Latest LHCb results

    Directory of Open Access Journals (Sweden)

    Martinelli Maurizio

    2014-01-01

    Full Text Available The LHCb experiment is one of the major research projects at the Large Hadron Collider. Its acceptance and instrumentation is optimised to perform high-precision studies of flavour physics and particle production in a unique kinematic range at unprecedented collision energies. Using large data samples accumulated in the years 2010-2012, the LHCb collaboration has conducted a series of measurements providing a sensitive test of the Standard Model and strengthening our knowledge of flavour physics, QCD and electroweak processes. The status of the experiment and some of its recent results are presented here.

  19. Recent BABAR Results

    Energy Technology Data Exchange (ETDEWEB)

    Eigen, Gerald [University of Bergen, Bergen (Norway). Dept. of Physics

    2015-04-29

    We present herein the most recent BABAR results on direct CP asymmetry measurements in B → Xsγ, on partial branching fraction and CP asymmetry measurements in B → Xs+-, on a search for B → π/ηℓ+- decays, on a search for lepton number violation in B+ → X-+ℓ'+ modes and a study of B0 →ωω and B0 → ωφ decays.

  20. Spacelab Science Results Study

    Science.gov (United States)

    Naumann, R. J.; Lundquist, C. A.; Tandberg-Hanssen, E.; Horwitz, J. L.; Germany, G. A.; Cruise, J. F.; Lewis, M. L.; Murphy, K. L.

    2009-01-01

    Beginning with OSTA-1 in November 1981 and ending with Neurolab in March 1998, a total of 36 Shuttle missions carried various Spacelab components such as the Spacelab module, pallet, instrument pointing system, or mission peculiar experiment support structure. The experiments carried out during these flights included astrophysics, solar physics, plasma physics, atmospheric science, Earth observations, and a wide range of microgravity experiments in life sciences, biotechnology, materials science, and fluid physics which includes combustion and critical point phenomena. In all, some 764 experiments were conducted by investigators from the U.S., Europe, and Japan. The purpose of this Spacelab Science Results Study is to document the contributions made in each of the major research areas by giving a brief synopsis of the more significant experiments and an extensive list of the publications that were produced. We have also endeavored to show how these results impacted the existing body of knowledge, where they have spawned new fields, and if appropriate, where the knowledge they produced has been applied.

  1. Results from TOTEM

    Directory of Open Access Journals (Sweden)

    Eggert Karsten

    2013-06-01

    Full Text Available The TOTEM experiment at the CERN LHC is focussed on the measurement of the elastic proton-proton scattering, the total pp cross-section, and all kinds of diffractive phenomena. Detectors housed in “Roman Pots” which can be moved close to the outgoing proton beams allow to trigger on elastic and diffractive protons and to determine their parameters like the momentum loss and the transverse momentum transfer. In addition, charged particle detectors in the forward regions detect almost all inelastic events. Together with the CMS detector, a large solid angle is covered enabling precise studies of Min. Bias as well as Single Diffractive and Double Pomeron Interactions. The results will considerably help the interpretation of the Cosmic Ray Showers at highest energies and will give insight into the proton structure and the QCD theory of strong interactions. TOTEM measured the elastic pp- scattering over a large range of t (the squared momentum transfer from 10-3 – 4 GeV2. Noneof the considered models could yield a satisfactory fit over the complete range. However, the exponential slope at low |t|-values and the position of the diffractiveminimum are well within the extrapolation from lower energies. The total pp cross-section has been determined in different ways from the extrapolation of the elasticscattering to t=0 (optical point and the inelastic rate: (i From the elastic scattering using the optical theorem and the CMS, (ii luminosity independently, usingthe inelastic rate, elastic scattering and the optical theorem, (iiiρ independently, by using elastic scattering, inelastic rate and the CMS luminosity. The results for the total crosssection obtained from the different methods are in excellent agreement with each other. First studies of the data on diffractive phenomena havebeen performed by correlating the momentum loss of the forward protons with the topology of the particle flux. The data look very promising and further studies will

  2. Latest results from LUNA

    Science.gov (United States)

    Depalo, Rosanna; LUNA Collaboration

    2018-01-01

    A precise knowledge of the cross section of nuclear fusion reactions is a crucial ingredient in understanding stellar evolution and nucleosynthesis. At stellar temperatures, fusion cross sections are extremely small and difficult to measure. Measuring nuclear cross sections at astrophysical energies is a challenge that triggered a huge amount of experimental work. A breakthrough in this direction was the first operation of an underground accelerator at the Laboratory for Underground Nuclear Astrophysics (LUNA) in Gran Sasso, Italy. The 1400 meters of rocks above the laboratory act as a natural shield against cosmic radiation, suppressing the background by orders of magnitude. The latest results achieved at LUNA are discussed, with special emphasis on the 22Ne(p,γ)23Na reaction. Future perspectives of the LUNA experiment are also illustrated.

  3. Recent Results from BLAST

    International Nuclear Information System (INIS)

    Hasell, D.K.

    2005-01-01

    The Bates Large Acceptance Spectrometer Toroid experiment, BLAST, at the MIT-Bates Linear Accelerator Laboratory is designed to study in a systematic manner the spindependent electromagnetic interaction in few-nucleon systems at momentum transfers below 1 GeV/c. Utilizing a polarized electron beam, highly polarized internal gas targets of H and D, and a symmetric detector configuration, BLAST is able to make simultaneous measurements of several reaction channels for different combinations of beam helicity and target polarization (vector for H, both vector and tensor for D). BLAST will provide new data on the nucleon and deuteron form factors as well as study few body physics and pion production. Preliminary results are presented

  4. Cosmogenic activation: Recent results

    Science.gov (United States)

    Kudryavtsev, Vitaly A.

    2018-01-01

    Activation of materials is known to cause background events in underground experiments that may affect the sensitivity of these experiments to rare event searches. The most common source of activation is the exposure of materials to cosmic rays at the surface of the Earth but other various sources of neutrons may also be dangerous. Different computer codes provide estimates of production rates of radioactive isotopes due to activation but their results are sometimes inconsistent. High-sensitivity experiments looking for dark matter, neutrino-less double-beta decay or neutrinos from various sources, although affected by activation, provide crucial tests of models used in the codes. Recent calculations and measurements of activation rates are discussed in this paper.

  5. ATLAS Top Quark Results

    CERN Document Server

    Black, Kevin; The ATLAS collaboration

    2017-01-01

    The top quark is the heaviest known fundamental particle. As it is the only quark that decays before it hadronizes, this gives us the unique opportunity to probe the properties of bare quarks at the Large Hadron Collider. This talk will present highlights of a few recent precision measurements by the ATLAS Collaboration of the top quark using 13 TeV and 8 TeV collision data: top-quark pair and single top production cross sections including differential distributions will be presented alongside top quark properties measurements. These measurements, including results using boosted top quarks, probe our understanding of top quark production in the TeV regime. Measurements of the top quark mass and searches for rare top quark decays are also presented.

  6. EIGER characterization results

    International Nuclear Information System (INIS)

    Dinapoli, Roberto; Bergamaschi, Anna; Greiffenberg, Dominic; Henrich, Beat; Horisberger, Roland; Johnson, Ian; Mozzanica, Aldo; Radicci, Valeria; Schmitt, Bernd; Shi, Xintian; Tinti, Gemma

    2013-01-01

    Characterization and performance measurements have been done on several EIGER detector systems, produced with chips coming from two different lots, both with a lab X-ray source and at the Swiss Light Source (SLS). Results on the detector calibration, electronic noise, threshold dispersion, minimum achievable energy threshold, maximum detectable incoming photon flux and maximum frame rate are presented. An EIGER module is constructed from a ∼4×8cm 2 monolithic silicon sensor bump-bonded to 2 ×4 readout chips and contains 0.5 Mpixel. The first EIGER 500 K systems have been produced and images taken with these detectors are shown. Modules can be tiled together to form large area detectors; both a 9 Mpixel and a 16 Mpixel systems are at present under development for the coherent small angle X-ray scattering and protein crystallography beamlines of the SLS

  7. EIGER characterization results

    Energy Technology Data Exchange (ETDEWEB)

    Dinapoli, Roberto, E-mail: roberto.dinapoli@psi.ch [Paul Scherrer Institut, 5232 Villigen PSI (Switzerland); Bergamaschi, Anna; Greiffenberg, Dominic; Henrich, Beat; Horisberger, Roland; Johnson, Ian; Mozzanica, Aldo [Paul Scherrer Institut, 5232 Villigen PSI (Switzerland); Radicci, Valeria [Paul Scherrer Institut, 5232 Villigen PSI (Switzerland); ESRF, 6 Rue Horowitz, 38043 Grenoble (France); Schmitt, Bernd; Shi, Xintian [Paul Scherrer Institut, 5232 Villigen PSI (Switzerland); Tinti, Gemma [Paul Scherrer Institut, 5232 Villigen PSI (Switzerland); ESRF, 6 Rue Horowitz, 38043 Grenoble (France)

    2013-12-11

    Characterization and performance measurements have been done on several EIGER detector systems, produced with chips coming from two different lots, both with a lab X-ray source and at the Swiss Light Source (SLS). Results on the detector calibration, electronic noise, threshold dispersion, minimum achievable energy threshold, maximum detectable incoming photon flux and maximum frame rate are presented. An EIGER module is constructed from a ∼4×8cm{sup 2} monolithic silicon sensor bump-bonded to 2 ×4 readout chips and contains 0.5 Mpixel. The first EIGER 500 K systems have been produced and images taken with these detectors are shown. Modules can be tiled together to form large area detectors; both a 9 Mpixel and a 16 Mpixel systems are at present under development for the coherent small angle X-ray scattering and protein crystallography beamlines of the SLS.

  8. Scientific results - report 1981

    International Nuclear Information System (INIS)

    1982-01-01

    During the year under report 1981, five working groups were active in the field of nuclear chemistry: neutron diffraction, radiation damage in solids, reactor chemistry, trace element research in bio-medicine and geo-chemistry. The objectives of the R+D projects ranged from the more basic research to the development of technological processes. Nuclear inspection methodes that have already been developed (e.g. neutron diffraction, trace element analysis) have increasingly been used in an interdisciplinary way. Besides these R+D projects the project of increase of power of the BER II was pursued also in 1981, and further planning documents on the extension of the BER II have been established. The report informs about the most important results of the single sections. A list of the publications (with abstracts) and lectures, also by guest scientists, is attached. (RB) [de

  9. Latest results from ALICE

    CERN Document Server

    Scapparone, Eugenio

    2011-01-01

    In this paper selected results obtained by the ALICE experiment at the LHC will be presented. Data collected during the pp runs taken at sqrt(s)=0.9, 2.76 and 7 TeV and Pb-Pb runs at sqrt(s_NN)=2.76 TeV allowed interesting studies on the properties of the hadronic and nuclear matter: proton runs gave us the possibility to explore the ordinary matter at very high energy and up to very low pt, while Pb-Pb runs provided spectacular events where several thousands of particles produced in the interaction revealed how a very dense medium behaves, providing a deeper picture on the quark gluon plasma(QGP) chemical composition and dynamics.

  10. Recent results from CMS

    CERN Multimedia

    CERN. Geneva

    2016-01-01

    With the increase in center-of-mass energy, a new energy frontier has been opened by the Large Hadron Collider. More than 25 fb^-1 of proton-proton collisions at sqrt(s)=13 TeV have been delivered to both ATLAS and CMS experiments during 2016. This enormous dataset can be used to test the Standard Model in a complete new regime with tremendous precision and it has the potential to unveil new physics or set strong bounds on it. In this talk some of the most recent results made public by the CMS Collaboration will be presented. The focus will mainly be on searches for physics beyond the Standard Model, with particular emphasis on searches for dark matter candidates.

  11. Dissociated methanol test results

    Energy Technology Data Exchange (ETDEWEB)

    Finegold, J.G.; McKinnon, J.T.

    1982-04-01

    The design and testing of an automotive fuel system that provides hydrogen-rich gases to an internal combustion engine by catalytically cracking, or dissociating, methanol on board the vehicle is described. The vaporization and dissociation of methanol absorb heat from the engine exhaust and increase the lower heating value of the fuel by approximately 22%. In addition, raising the compression ratio and burning with excess air increase the engine thermal efficiency. Engine dynamometer test results with dissociated methanol demonstrated improvement in brake thermal efficiency compared to gasoline from 30% to 100% depending on engine speed and torque. Lower speeds and torques produce the largest improvements. Maps of exhaust temperature and exhaust heat content are presented. The exhaust temperature is almost always high enough for dissociation to occur, but at lower power outputs, there is only enough exhaust energy for partial dissociation of the methanol.

  12. Undulator Transportation Test Results

    International Nuclear Information System (INIS)

    Wolf, Zachary

    2010-01-01

    A test was performed to determine whether transporting and handling the undulators makes any changes to their properties. This note documents the test. No significant changes to the test undulator were observed. After the LCLS undulators are tuned and fiducialized in the Magnetic Measurement Facility (MMF), they must be transported to storage buildings and transported to the tunnel. It has been established that the undulators are sensitive to temperature. We wish to know whether the undulators are also sensitive to the vibrations and shocks of transportation. To study this issue, we performed a test in which an undulator was measured in the MMF, transported to the tunnel, brought back to the MMF, and re-measured. This note documents the test and the results.

  13. Overview of HERMES results

    International Nuclear Information System (INIS)

    Van Hulse, C.

    2016-01-01

    The HERMES experiment has collected a wealth of deep-inelastic scattering data using the 27.6 GeV polarized lepton beam at HERA and various pure gas targets, both unpolarized and polarized. This allowed for a series of diverse and unique measurements. Among them are measurements that provide information on the 3-dimensional structure of the nucleon, both in momentum space and in position space. Results of measurements of exclusive ω production on an unpolarized and transversely polarized nucleon target, sensitive to the distribution in transverse-position and longitudinal-momentum space, are discussed as well as the 3-dimensional extraction of azimuthal asymmetries measured in semi-inclusive deep-inelastic scattering, sensitive to twist-2 and twist-3 distributions in 3-dimensional momentum space. (author)

  14. Physics Results from COMPASS

    CERN Document Server

    Bressan, A.

    2005-01-01

    The COMPASS Experiment at the CERN SPS has a broad physics program focused on the nucleon spin structure and on hadron spectroscopy, using muon and hadron beams. Main objectives for the spin program with the muon beam are the direct measurement of the gluon contribution to the spin of the nucleon, semi-inclusive measurements, and the measurement of the transverse spin distribution $\\Delta_T q$. The COMPASS apparatus consists of a two-stage large acceptance spectrometer designed for high data rates and equipped with high-resolution tracking, particle identification and electromagnetic and hadronic calorimetry. The data taking is ongoing since 2002 and till now was mainly devoted to the spin programme using a 160 GeV$/c$ naturally polarized, $\\mu^+$ beam and a polarized $^{6}$LiD target. First physics results from the 2002 and 2003 runs are presented.

  15. Recent results from LHCf

    Directory of Open Access Journals (Sweden)

    Menjo H.

    2015-01-01

    Full Text Available The LHCf experiment is one of the LHC forward experiments. The aim of LHCf is to provide critical calibration data of hadronic intraction models used in air shower simulations. The LHCf has completed the operations for p-p collisions with a collision energy of √s = 0.9 and 7 TeV p-p in 2010 and for p-Pb collisions with a collision energy per nucleon of √sNN = 5.02. The recent LHCf result of forward neutron energy spectra at 7 TeV p-p collision and forward π0 spectra at p-Pb collisions are presented in this paper.

  16. Results and discussion

    International Nuclear Information System (INIS)

    1998-01-01

    The author deals with the experimental study of sorption, desorption and vertical migration of radionuclides in Sr-85 and Cs-137 in selected soil samples from around of NPP Bohunice and NPP Mochovce and other localities of the Slovakia. The influence of different materials [concurrent ions (K + , Ca 2+ , NH 4 + , pH), organic matter (peat) and zeolite, humidity] on kinetic of sorption and desorption of strontium and cesium as well as distribution coefficient (K D ) and transfer coefficients in followed samples of soils were followed. Obtained adsorption isotherm are presented and discussed. Using the Tessiere's sequential extraction analysis a gross variability in binding of radionuclides on soils was found. The obtained results were processed with the correlation analysis and the compartment model

  17. Areva - 2011 Annual results

    International Nuclear Information System (INIS)

    Marie, Patricia; Briand, Pauline; Michaut, Maxime; Scorbiac, Marie de; Repaire, Philippine du

    2012-01-01

    Areva's backlog established at 45.6 billion euros at the end of 2011, significantly increasing at the end of a year marked by the Fukushima accident, confirms the commercial dynamism of the group alongside its customers and reinforces the visibility on its future business level. In a difficult context, the slight decline in revenue in 2011 demonstrates the robustness of Areva's integrated model, resting mainly on recurring business generated in relation to Areva's customers' nuclear installed base, and benefiting from the development of Areva's renewable energies operations. Free operating cash flow before tax, although down over the whole year in 2011, improved in the second half, showing the first effects of Areva's stronger focus on cash generation and debt management. After the success of Areva's bond issue in September 2011, the Group's liquidity remains high at the end of 2011. The Areva teams are now dedicating all of their efforts to the deployment of the 'Action 2016' strategic action plan, which had already yielded its first positive results at the end of 2011, with an improvement in the cost structure of Areva's operations, an increase in order intake, and the launch of several disposals of minority interests. Summary of the 2011 financial results: - Backlog: euro 45.6 bn, +3.1% vs. 2010, i.e +6.7% over 3 months; - Revenue: euro 8.872 bn, i.e -2.6% vs. 2010; - Operating income: - euro 1.923 bn; - Net income attributable to equity owners of the parent: - euro 2.424 bn; - EBITDA: euro 1.068 bn ( euro 420 m excluding Siemens impact); - Free operating cash flow before tax: - euro 2.397 bn (- euro 1.366 bn excluding Siemens impacts), improvement over the second half; - Decrease in net debt of euro 124 m for the year; - Significant drop in general and administrative expenses, with a noticeable reduction between the first and the second half; - Launch of several disposals of minority interests

  18. Report on Results 2000

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-07-01

    This report discusses work being carried out in Norway to promote energy efficiency and the production of new renewable energy. An overall review of the quantifiable results of last year's activities at national level is available. It will serve to initiate an annual reporting tradition. The report represents a step towards an ongoing process for improved targeting and management of national efforts. During the course of the year 2000, NVE has evaluated and adjusted its activities and established a system involving indicators and reporting procedures. It is also important to take notice of the long-term work being undertaken to influence people's attitudes, even though this work is difficult to assess. NVE is investing in i.a. measures aimed at children and young people. Apart from directly influencing future energy users, this investment is also having an effect due to the children's encouragement of their parents to engage in more energy and environment-friendly behaviour. Published in 2000, the IEA report ''Trends in Norwegian Stationary Energy Use'' shows that total Norwegian energy consumption per GDP is not much higher than in other IEA countries, when adjusted for cold climate and industrial structure. However, Norwegians do stand out as intensive users of electricity. The IEA report shows a reduction of 10 TWh in energy usage when compared to the projected post 1990 figures. Energy efficiency activities have contributed towards this reduction. However, the potential for a more rational use of energy in Norway is still substantial and well documented. Based on experience most enterprises could save around 10% of energy used just by making changes to their operations, i.e. without major investments. Furthermore, the potential is growing because of massive technological developments in respect of energy usage, production and distribution. With this in mind, it is necessary to take full advantage of the extensive knowledge

  19. URAT South Parallax Results

    Science.gov (United States)

    Finch, Charlie T.; Zacharias, Norbert; Jao, Wei-Chun

    2018-04-01

    We present 916 trigonometric parallaxes and proper motions of newly discovered nearby stars from the United States Naval Observatory Robotic Astrometric Telescope (URAT). Observations were taken at the Cerro Tololo Interamerican Observatory over a 2-year period from 2015 to 2017 October covering the entire sky south of about +25° decl. SPM4 and UCAC4 early epoch catalog data were added to extend the temporal coverage for the parallax and proper motion fit up to 48 years. Using these new URAT parallaxes, optical and near-IR photometry from the AAVSO Photometric All-Sky Survey and Two Micron All-Sky Survey catalogs, we identify possible new nearby dwarfs, young stars, low-metallicity subdwarfs and white dwarfs. Comparison to known trigonometric parallaxes shows a high quality of the URAT-based results confirming the error in parallax of the URAT south parallaxes reported here to be between 2 and 13 mas. We also include additional 729 trigonometric parallaxes from the URAT north 25 pc sample published in Finch & Zacharias here after applying the same criterion as for the southern sample to have a complete URAT 25 pc sample presented in this paper.

  20. Lower gastrointestinal endoscopies results

    Directory of Open Access Journals (Sweden)

    Ahmet Bozdağ

    2014-12-01

    Full Text Available Objectives: Endoscopic examinations have great potential in early diagnosis of colorectal adenomas and carcinomas with reducing to colorectal cancer incidence and mortality. We aimed to evaluate for diagnostic purposeful lower gastrointestinal endoscopic procedures in the second step state hospital retrospectively Methods: Between June 2010 and June 2013, we evaluated 278 patients with rectal bleeding, constipation and abdominal pain detected by lower gastrointestinal endoscopic procedures retrospectively. Results: The mean age of the patients was 54.8 ± 16.8 (15-90 year, respectively. 172 (61.9% of the patients were male and 106 (38.1% of the patients were female. 116 (41.7% of the patients was performed rectosigmoidoscopy and 162 (58.3% of the patients was performed colonoscopy. 51(18.3% of our patients were normal. 10 (3.6% of patients had colorectal cancer, 11(3.9% of patients had inflammatory bowel disease, 8 (2.9% of patients had parasitosis, 31(11.1% of patients had colorectal polyps, 12 (4.3% , in patients had diverticular disease, 2 (0.7% patients had rectal ulcer, 25 (9% patients had anal fissure and 159 (57.2% of the patients had hemorrhoidal disease. Conclusion: Lower gastrointestinal endoscopy is a method been the gold standard with a low complication rate and that can be easily applied in the evaluation to pathology of colorectal and anal canal. J Clin Exp Invest 2014; 5 (4: 580-582

  1. esophageal cancer: preliminary results

    Directory of Open Access Journals (Sweden)

    Afsaneh Maddah Safaei

    2017-01-01

    Full Text Available Purpose: Dysphagia is a common initial presentation in locally advanced esophageal cancer and negatively impacts patient quality of life and treatment compliance. To induce fast relief of dysphagia in patients with potentially operable esophageal cancer high-dose-rate (HDR brachytherapy was applied prior to definitive radiochemotherapy. Material and methods : In this single arm phase II clinical trial between 2013 to 2014 twenty patients with locally advanced esophageal cancer (17 squamous cell and 3 adenocarcinoma were treated with upfront 10 Gy HDR brachytherapy, followed by 50.4 Gy external beam radiotherapy (EBRT and concurrent chemotherapy with cisplatin/5-fluorouracil. Results : Tumor response, as measured by endoscopy and/or computed tomography scan, revealed complete remission in 16 and partial response in 4 patients (overall response rate 100%. Improvement of dysphagia was induced by brachytherapy within a few days and maintained up to the end of treatment in 80% of patients. No differences in either response rate or dysphagia resolution were found between squamous cell and adenocarcinoma histology. The grade 2 and 3 acute pancytopenia or bicytopenia reported in 4 patients, while sub-acute adverse effects with painful ulceration was seen in five patients, occurring after a median of 2 months. A perforation developed in one patient during the procedure of brachytherapy that resolved successfully with immediate surgery. Conclusions : Brachytherapy before EBRT was a safe and effective procedure to induce rapid and durable relief from dysphagia, especially when combined with EBRT.

  2. ALOS-2 initial results

    Science.gov (United States)

    Kankaku, Yukihiro; Suzuki, Shinichi; Shimada, Masanobu

    2015-10-01

    The Advanced Land Observing Satellite-2 (ALOS-2) was launched from Tanegashima Space Center by H-IIA rocket successfully on 24th May 2014. ALOS-2 carries the Phased Array type L-band Synthetic Aperture Radar-2 (PALSAR-2) as the state-of-the-art L-band SAR system which succeeds to PALSAR onboard ALOS. PALSAR-2 uses almost whole bandwidth allocated for L-band active sensor of Earth Exploration Satellites Service specified by the Radio Regulation in order to realize the high resolution observation, and also, it transmits more than 6 kW power for lower Noise Equivalent Sigma Zero using 180 TRMs driven by Gallium Nitride (GaN) amplifier which is the first use in space. Furthermore, because ALOS-2 carries the SAR system only, PALSAR-2 antenna can be mounted under the satellite body. It enables to observe right-/left-looking observation by satellite maneuvering. And the high accuracy orbit control to maintain the satellite within 500 m radius tube against the reference orbit enables high coherence for the InSAR processing. Using these new technologies, ALOS-2 has been operating to fulfill the mission requirements such as disaster monitoring and so on. This document introduces the initial result of ALOS-2 from the first year operation.

  3. Results from SNO

    Energy Technology Data Exchange (ETDEWEB)

    Chan, Yuen-dat

    2001-10-01

    The Sudbury Neutrino Observatory (SNO) is an underground heavy water Cherenkov detector for studying solar neutrinos. SNO is capable of performing both flavor sensitive and flavor blind measurements of the solar neutrino flux. The first charged current (CC) measurement is found to be: {psi}{sub SNO}{sup CC}({nu}{sub e}) = 1.75 {+-} 0.07(stat.){sub -0.11}{sup +0.12}(sys.) {+-} 0.05 (theor.) x 10{sup 6} cm{sup -2}s{sup -1} and the elastic scattering fluxes (ES) is: {psi}{sub SNO}{sup ES}({nu}{sub x}) = 2.39 {+-} 0.34(stat.){sub -0.14}{sup +0.16} (sys.) x 10{sup 6} cm{sup -2}s{sup -1}. The {psi}{sub SNO}{sup CC}({nu}{sub e}) result, when combined with the high statistics elastic scattering (ES) measurement from Super-Kamiokande, provide a strong evidence for solar neutrino flavor transformation (3.3{sigma}). The deduced total solar neutrino flux is in good agreement with standard solar model predictions. No significant distortion in the energy spectrum is observed.

  4. Results from LHCf Experiment

    CERN Document Server

    Tricomi, Alessia

    2012-01-01

    The LHCf experiment has taken data in 2009 and 2010 p-p collisions at LHC at $\\sqrt{s} = 0.9$ TeV and $\\sqrt{s} = 7$ TeV. The measurement of the forward neutral particle spectra produced in proton-proton collisions at LHC up to an energy of 14 TeV in the center of mass system are of fundamental importance to calibrate the Monte Carlo models widely used in the high energy cosmic ray (HECR) field, up to an equivalent laboratory energy of the order of $10^{17}$ eV. In this paper the first results on the inclusive photon spectrum measured by LHCf is reported. Comparison of this spectrum with the model expectations show significant discrepancies, mainly in the high energy region. In addition, perspectives for future analyses as well as the program for the next data taking period, in particular the possibility to take data in p-Pb collisions, will be discussed.

  5. Results from SNO

    International Nuclear Information System (INIS)

    Chan, Yuen-dat

    2001-01-01

    The Sudbury Neutrino Observatory (SNO) is an underground heavy water Cherenkov detector for studying solar neutrinos. SNO is capable of performing both flavor sensitive and flavor blind measurements of the solar neutrino flux. The first charged current (CC) measurement is found to be: ψ SNO CC (ν e ) = 1.75 ± 0.07(stat.) -0.11 +0.12 (sys.) ± 0.05 (theor.) x 10 6 cm -2 s -1 and the elastic scattering fluxes (ES) is: ψ SNO ES (ν x ) = 2.39 ± 0.34(stat.) -0.14 +0.16 (sys.) x 10 6 cm -2 s -1 . The ψ SNO CC (ν e ) result, when combined with the high statistics elastic scattering (ES) measurement from Super-Kamiokande, provide a strong evidence for solar neutrino flavor transformation (3.3σ). The deduced total solar neutrino flux is in good agreement with standard solar model predictions. No significant distortion in the energy spectrum is observed

  6. Climax granite test results

    Energy Technology Data Exchange (ETDEWEB)

    Ramspott, L.D.

    1980-01-15

    The Lawrence Livermore Laboratory (LLL), as part of the Nevada Nuclear Waste Storage Investigations (NNWSI) program, is carrying out in situ rock mechanics testing in the Climax granitic stock at the Nevada Test Site (NTS). This summary addresses only those field data taken to date that address thermomechanical modeling for a hard-rock repository. The results to be discussed include thermal measurements in a heater test that was conducted from October 1977 through July 1978, and stress and displacement measurements made during and after excavation of the canister storage drift for the Spent Fuel Test (SFT) in the Climax granite. Associated laboratory and field measurements are summarized. The rock temperature for a given applied heat load at a point in time and space can be adequately modeled with simple analytic calculations involving superposition and integration of numerous point source solutions. The input, for locations beyond about a meter from the source, can be a constant thermal conductivity and diffusivity. The value of thermal conductivity required to match the field data is as much as 25% different from laboratory-measured values. Therefore, unless we come to understand the mechanisms for this difference, a simple in situ test will be required to obtain a value for final repository design. Some sensitivity calculations have shown that the temperature field is about ten times more sensitive to conductivity than to diffusivity under the test conditions. The orthogonal array was designed to detect anisotropy. After considering all error sources, anisotropic efforts in the thermal field were less than 5 to 10%.

  7. Areva: 2014 annual results

    International Nuclear Information System (INIS)

    Repaire, Philippine du

    2015-01-01

    The scale of the net loss for 2014 illustrates the twofold challenge confronting AREVA: continuing stagnation of the nuclear operations, lack of competitiveness and difficulties in managing the risks inherent in large projects. The group understands how serious this situation is. A comprehensive strategic review of operations was undertaken beginning in November 2014 and is being carried out without compromise. As a result, AREVA is now able to announce a solid transformation plan that sets a challenging but economically realistic course for its teams. First, AREVA will refocus on its core business: mastery of key nuclear processes essential to operators around the globe. This strategic redeployment will lead to the revision of certain goals, whether in the management of new reactor projects or in renewable energies. AREVA's objective is to achieve excellence as a high value-added supplier of products and services. Secondly, AREVA, whose resources had been marshaled to support a spurt of growth in nuclear power, must now adapt to new market realities and become competitive once again. The group's most urgent task is recovery and securing its future by immediately launching a far-reaching competitiveness plan founded on organizational simplification, quality of operations, and a completely revamped approach to managing risk in large projects. Last but not least, AREVA must ensure sustainable financing for its activities. A financing plan will be clarified before publication of the half-year financial statements. This document presents the key financial data of the group, its strategic road-map and its operating and financing plans

  8. First results from JADE

    International Nuclear Information System (INIS)

    Bartel, W.; Canzler, T.; Cords, D.; Dittmann, P.; Eichler, R.; Felst, R.; Gadermann, E.; Haidt, D.; Kawabata, H.; Krehbiel, H.

    1979-11-01

    First results from the JADE experiment at the highest PETRA energies (√s = 22 to 31.6 GeV) are reported, QED is tested using the reactions e + e - → e + e - and γγ and found valid down to distances of 2 x 10 -16 cm. Fits to the differential cross section for e + e - → e + e - provide constraints on models of the weak-electromagnetic interaction. For the reaction e + e - → multihadrons an average R value of 4.1 +-0.3 is obtained in the above energy range, compatible with production of quarks with only the known flavours (u, d, s, c, b). Topological distributions of the hadrons are studied in search of derivations from narrow two-jet structure. No evidence is observed for spherical events, which would be expected from production of heavy particles bearing a new flavour. However, broadening of jets and an excess of planar events are observed at a rate which cannot be explained by statistical fluctuations in the two-jet mechanism. The planar events exhibit distinct three-jet structures in many cases. If gluon bremsstrahlung e + e - → q anti q g is included, detailed agreements are obtained between the predictions and data. This strongly suggests gluon bremsstrahlung as the origin of jet broadening and planar three-jet events. Free fractionally charged or heavy stable particles are searched for in the multihadron sample and upper limits for production cross sections are obtained. The azimuthal angular distributions of both inclusive hadrons and jet axes show a cos 2 diameter-like modulation, compatible with a large vertical beam polarization. (orig.)

  9. AREVA annual results 2009

    International Nuclear Information System (INIS)

    2009-01-01

    AREVA expanded its backlog and increased its revenues compared with 2008, on strong installed base business and dynamic major projects, fostering growth in operating income of 240 million euros. As announced previously, Areva is implementing a financing plan suited to its objectives of profitable growth. The plan was implemented successfully in 2009, including the conclusion of an agreement, under very satisfactory terms, to sell its Transmission and Distribution business for 4 billion euros, asset sales for more than 1.5 billion euros, and successful bond issues of 3 billion euros. The plan will continue in 2010 with a capital increase, the completion of asset disposals and cost reduction and continued operational performance improvement programs. Areva bolstered its Renewable Energies business segment by supplementing its offshore wind power and biomass businesses with the acquisition of Ausra, a California-based leader in concentrated solar power technology. Despite the sale of T and D, Areva is maintaining its financial performance outlook for 2012: 12% average annual revenue growth to 12 billion euros in 2012, double digit operating margin and substantially positive free operating cash flow. Annual results 2009: - For the group as a whole, including Transmission and Distribution: Backlog: euros 49.4 bn (+2.5%), Revenues: euros 14 bn (+6.4%), Operating income: euros 501 m (+20.1%); - Nuclear and Renewable Energies perimeter: Backlog: euros 43.3 bn (+1.8%), Strong revenue growth: +5.4% to euros 8.5 bn, Operating income before provision for the Finnish project in the first half of 2009: euros 647 m, Operating income: euros 97 m, for a euros 240 m increase from 2008; - Net income attributable to equity holders of the parent: euros 552 m, i.e. euros 15.59 per share; - Net debt: euros 6,193 m; - Pro-forma net debt, including net cash to be received from the sale of T and D in 2010: euros 3,022 m; - Dividend of euros 7.06 per share to be proposed during the Annual

  10. Montmorillonite stability - experimental results

    International Nuclear Information System (INIS)

    Karnland, Ola; Birgersson, Martin; Olsson, Siv

    2012-01-01

    Document available in extended abstract form only. Several repository concepts for spent nuclear fuel comprise a bentonite buffer which encloses the fuel containers. The function of this bentonite buffer is critically dependent on the properties of the swelling mineral in the bentonite, which typically is montmorillonite in commercial high quality bentonites. The physical and chemical properties of the montmorillonite in bentonites have consequently been studied in various types of analyses in several countries, and the results have been the basis for the design of the bentonite buffer with respect to size, degree of compaction etc (SKB TR-10-47). Significant changes in the montmorillonite structure with time may change the properties of the bentonite buffer and jeopardize the isolating function. In nature, illite is the most common alteration product from montmorillonite, and a 50% alteration reduces, for instance, the swelling pressure by one order of magnitude. Fortunately, the process is very slow at typical repository temperatures, and also in the perspective of repository life-time no significant alteration is expected according to the available kinetic models. The models are, however, based on laboratory batch experiments performed at temperatures, which by necessity are much higher than what is planned for in a repository. Alternatively, the models are based on natural montmorillonite-to-illite alteration in e.g. deep sediments. In both cases there are divergences from repository conditions which limit the arguments for the bentonite buffer stability. The mechanism by which the montmorillonite-to-illite reaction takes place is not fully understood, but the overall process may be represented by the following schematic reaction: Na + montmorillonite + K + + Al 3+ → illite + SiO 2 + Na + . Aluminum may be supplied from the bentonite itself, but potassium has to be transported to the buffer from an external source in order to give a significant alteration in

  11. Promising pesticide results

    International Nuclear Information System (INIS)

    Wallace, Paula

    2012-01-01

    stability of DDT in soil. Given its 'sticky' quality, DDT is difficult to isolate and treat in the solid matrix of soil. “Our ViroFlow Technology has been designed to overcome both these problems by using a chemical, not bacterial, agent and by separating DDT from the structure of the soil matrix, thereby making it vulnerable to decomposition,” said Barros. As a result of these findings, Virotec is conducting a series of tests in conjunction with the NSW EPA and Department of Primary Industries to examine ways its solution can be applied to treating DDT in soil.

  12. Melhoramento do cajueiro-anão-precoce: avaliação da qualidade do pedúnculo e a heterose dos seus híbridos Improvement of the dwarf cashew tree: evaluation of the quality of the apple and the heterosis of their hybrids

    Directory of Open Access Journals (Sweden)

    JOÃO RIBEIRO CRISÓSTOMO

    2002-08-01

    progress, the consumption is still low since it doesn't reach 1% of about 1,5 million tons yearly produced in the Northeast region. This low consumption is due to some factors, such as the tannin content (0,27% to 0,72% existent in the cashew apple of the cultivated types of A. occidentale. The Embrapa is realizing an research aiming to improve the apple characteristics of the dwarf clones CP76 and CP09, by backcrossing with A. microcarpum specie. In this work, initiate in 1999, were evaluated the tannin content, the total acidity (ATT%, the total soluble solids (SST, the relationship SST/ATT, the pH and the texture of cashew apples of the genitors used in the backcross and their respective hybrids, with the following results: a the reduced tannin content were confirmed (0,14% and of ATT (0,16% in the A. microcarpum, in relation with the averages of the clones CP76 and CP09 (0,33% for tannin and 0,26% for ATT; b A. microcarpum was also superior concerning the relationship SST/ATT (80,6% and the texture of the cashew apple (10,75 N, with the values for the clones of 47,90 and 6,9N, respectively; c these results confirm the importance of A. microcarpum as father donor in the genetic improvement; d the genitors didn't differ in relation to the contents of total soluble solids (SST and pH; e the hybrid among A. microcarpum x A. occidentale exhibited accentuated hybrid vigor in relation to the tannin content, acidity and texture and absence of hybrid vigor, in relation to the values of the pH and of total soluble solids (SST; f there wasn't effect in the reciprocal crossings, for most of the studied characteristics, except for the tannin content.

  13. Proteomic Analysis of Silk Viability in Maize Inbred Lines and Their Corresponding Hybrids.

    Directory of Open Access Journals (Sweden)

    Zhihui Ma

    Full Text Available A long period of silk viability is critical for a good seed setting rate in maize (Zea mays L., especially for inbred lines and hybrids with a long interval between anthesis and silking. To explore the molecular mechanism of silk viability and its heterosis, three inbred lines with different silk viability characteristics (Xun928, Lx9801, and Zong3 and their two hybrids (Xun928×Zong3 and Lx9801×Zong3 were analyzed at different developmental stages by a proteomic method. The differentially accumulated proteins were identified by mass spectrometry and classified into metabolism, protein biosynthesis and folding, signal transduction and hormone homeostasis, stress and defense responses, and cellular processes. Proteins involved in nutrient (methionine and energy (ATP supply, which support the pollen tube growth in the silk, were important for silk viability and its heterosis. The additive and dominant effects at a single locus, as well as complex epistatic interactions at two or more loci in metabolic pathways, were the primary contributors for mid-parent heterosis of silk viability. Additionally, the proteins involved in the metabolism of anthocyanins, which indirectly negatively regulate local hormone accumulation, were also important for the mid-parent heterosis of silk viability. These results also might imply the developmental dependence of heterosis, because many of the differentially accumulated proteins made distinct contributions to the heterosis of silk viability at specific developmental stages.

  14. Preliminary analysis on hybrid vigor in Indonesian indigenous and crossbred cattle population using data from published studies

    Science.gov (United States)

    Prastowo, S.; Widi, TSM; Widyas, N.

    2017-04-01

    Hybrid vigor or heterosis is the phenomenon where a crossbreed progeny has better performance compared to its parents. Heterosis can be quantified relative to the mid-parents value or relative to one of its parent’s population average by crossing two breeds. Crossbreeding is aimed to increase the production performance of local breeds. According to the Indonesian government policy, crossbreeding program is one of main strategies to achieve meat self-sufficiency. We explore the possibilities observing of heterosis exhibited by crossing Bali and Peranakan Onggole (PO) cattle as local breed with the exotic breed based on the published data. In this paper, growth and reproductive traits from Bali and PO from year 2000-2010 were used for analysis. Moreover, Limousine and Simmental exotic breed data were collected from official information of artificial insemination (AI) centre. Data in growth trait (chest girth, mature weight, weaning weight and yearling weight) in all breeds and their crosses were then analysed using standard heterosis estimation method. Result, shows that crossbred offspring perform better in the growth trait in relative to Bali and PO as local breed. Specifically in Bali crossed with PO, the offspring shown better estimated heterosis effect in yearling weight compared to both parents. Despite heterosis were observed in some traits, careful planning of crossbreeding program is a must in order to avoid the loss of genetic variance.

  15. Result

    Indian Academy of Sciences (India)

    With reference to the detailed evaluation of bids submitted the following agencies has been selected to award the contract on L1 ( lowest bidder) basis. 1. M/s . CITO INFOTECH, Bengaluru ( for procurement of desktop computers). 2. M/s. MCCANNINFO SOLUTION, Mumbai ( for procurement of laptops computers)

  16. Result

    African Journals Online (AJOL)

    Tsinuel

    BACKGROUND: Neonatal deaths in general, early neonatal deaths in particular now represent two- third of infant deaths and one-third of under-five deaths worldwide. Therefore, improving newborn survival is a major priority in child health today. Negotiation of improved neonatal health care practice into the community ...

  17. Results

    African Journals Online (AJOL)

    Refusing to eat new food. Baby losing weight. “The child refused eating the porridge since she was so used to the breastmilk.” “The child was crying of hunger always as he had never come to terms with the foods I started giving him. He refused to eat anything.” Children suffering from Diarrhea. “My child got very sick with ...

  18. Evaluation of Red Raspberry Cultivars Used for Breeding and Commercial Growing in the Baltic Region

    Directory of Open Access Journals (Sweden)

    Lācis Gunārs

    2017-06-01

    Full Text Available The structure of raspberry cultivars and genetic resources in the Baltic countries have been influenced by the historical political situation in the 20th century and climatic conditions, especially winterhardiness. The genetic resources consist of some old European and American cultivars, but mostly of cultivars and hybrids bred in Russia. Currently, targeted breeding programmes are active only in Estonia and Latvia, which aim to develop winterhardy, disease-resistant cultivars, well adapted to the local climate. Therefore, parent material for hybridisation has been chosen from local advanced hybrids and introduced cultivars suitable to the regional climatic conditions. The aim of the study was to estimate the level of genetic diversity of Rubus germplasm and assess inter-specific and intra-specific relationships using phenotypical characterisation and molecular markers. Forty one Rubus genotypes were evaluated by 41 phenotypical traits and 15 previously described SSR markers. Both characterisation approaches discovered high correspondence with pedigree and a low level of diversity. A limited amount of the diversity of raspberry genetic material has been used in various breeding programmes, despite their broad geographical origin. The obtained results indicate the need for including local wild R. idaeus plant material into breeding programmes.

  19. Partitioning and mobilization of photoassimilate in alfalfa subjected to water deficits

    International Nuclear Information System (INIS)

    Hall, M.H.; Sheaffer, C.C.; Heichel, G.H.

    1988-01-01

    Faster regrowth of a stressed alfalfa (Medicago sativa L.) crop compared to an unstressed crop after rewatering has been reported. The bases of this compensatory response are unknown, but they may be important to understanding adaptation to water stress and to developing crop water management strategies. The authors objectives was to determine the effect of stress induced by water deficit on photoassimilate partitioning and the utilization of stored assimilates during regrowth of alfalfa. Field and greenhouse experiments were conducted using cultivars differing in winterhardiness. Plants were subjected to water stress, pulse-labeled with 14 CO 2 , and sampled following 0, 1, 14, 21, and 28-d translocation periods. Following the 14-d sampling, herbage was harvested and water stress was removed. Cultivars contrasting in winterhardiness responded similarly to water stress. Stressed plant roots contained 73 and 114% more total plant radioactivity (TPR) than the control at the 1 and 14-d translocation periods, respectively. Water stress significantly increased root starch and TPR percentage in the starch fraction, but had much smaller effects on root soluble-sugar concentration and TPR percentage of the root sugar fraction. Herbage regrowth mass following harvest and rewatering of the water-stressed plants was similar to that of the control. Compared to the control, water-stressed alfalfa has greater total nonstructural carbohydrates in the roots, apparently due to increased photoassimilate partitioning to the roots. However, the greater root carbohydrate concentrations did not result in compensatory herbage regrowth following rewatering

  20. RADISH CV. MOKHOVSKIY IS A SOURCE OF MS- AND MF-LINES AT BREEDING FOR HETEROSIS

    Directory of Open Access Journals (Sweden)

    M. I. Fedorova

    2015-01-01

    Full Text Available Based on hybrid and inbreed population of radish cv. Mokhovskiy using CMS-ogura nine lines with 100% of male sterility and fertile maintainers were selected. Using the multiplex PCR, the presence of cytoplasm of Ogura type in ms-lines and its absence in mf-lines were confirmed.

  1. The environment strongly affects estimates of heterosis in hybrid sweet sorghum

    Science.gov (United States)

    Sweet sorghum (Sorghum bicolor (L.) Moench) has potential as a biofuel feedstock but hybrid cultivars are needed to support an industry based on this crop. The purpose of this study was to compare five inbred sweet sorghum lines and 15 hybrids derived from them, and to determine the extent of envir...

  2. 31 heterosis for litter traits in native by exotic inbred pig crosses

    African Journals Online (AJOL)

    OLUWOLE AKINNAGBE

    2009-01-01

    Jan 1, 2009 ... 1Department of Animal Science, Ebonyi State University, Abakaliki, Nigeria. ... INTRODUCTION. In Nigeria, government's policy on the ban of importation of inputs and services in the livestock sub sector has further exacerbated the plight of farmers in .... litter weight at birth and at weaning, gestation length.

  3. Heterosis para pesos a los 18 meses y sacrificio en un hato cebú-cruzado.

    Directory of Open Access Journals (Sweden)

    Llano Arango Juan David

    2003-12-01

    Full Text Available El objetivo de la presente investigación fue evaluar comparativamente los pesos o los 18 meses y al sacrificio de machos cruzados ¼ , bos taurus (aberdeen angus. holstein, simmental americano, simmental alemán por cebú y animales brahman puros cebú comercial y mestizos.

  4. Incomplete dominance of deleterious alleles contributes substantially to trait variation and heterosis in maize

    Science.gov (United States)

    Deleterious alleles have long been proposed to play an important role in patterning phenotypic variation and are central to commonly held ideas explaining the hybrid vigor observed in the offspring by crossing two inbred parents. We test these ideas using evolutionary measures of sequence conservati...

  5. Heterosis and combining ability of F1 hybrid sweet sorghum in Thailand

    Science.gov (United States)

    Sweet sorghum (Sorghum bicolor (L.) Moench) is a sugar-based biofuel crop that is well-suited to tropical environments. Most sweet sorghum cultivars are open-pollinated, but hybrids could offer yield and seed production advantages. Fifteen hybrids were generated among five female and three male pa...

  6. Individual Heterosis for Birth Weight of N'dama Crossbred Calves in ...

    African Journals Online (AJOL)

    Birth weight records of 1137 calves of which 94 were straight bred and 1043 were crossbred (545 males and 592 females) from crosses with two indigenous breeds Muturu and Keteku and seven breeds, Brahman, Angus, Charolais, German Brown, Hereford, Jersey and Santa Getrudis collected from Fasola Stock Farm ...

  7. Heterosis For Litter Traits In Native By Exotic Inbred Pig Crosses ...

    African Journals Online (AJOL)

    Inbred strains generated from native and exotic pigs were compared with their F1 and F2 backcross populations for a range of litter performance traits. Animals were intensively reared and at 81/2 months of age, the inbred genotypes from each strain were reciprocally mated to each other to generate F1 crossbred genotypes ...

  8. Heterosis and Combining Ability of Drought-Tolerant Maize Lines for ...

    African Journals Online (AJOL)

    were tested separately in randomized complete block design under normal and high plant densities that combined ... significant GCA x E and SCA x E interactions shows that combining ability effects change with growing .... under each growing condition was performed, using Agrobase 20 Software. (Agronomix Software ...

  9. Heterosis para pesos a los 18 meses y sacrificio en un hato cebú-cruzado.

    OpenAIRE

    Llano Arango, Juan David; Montoya Serna, Camilo; Arboleda Zapata, Elkin Mauricio

    2011-01-01

    El objetivo de la presente investigación fue evaluar comparativamente los pesos o los 18 meses y al sacrificio de machos cruzados ¼ , bos taurus (aberdeen angus. holstein, simmental americano, simmental alemán) por cebú y animales brahman puros cebú comercial y mestizos.

  10. Individual heterosis for birth weight of N'dama crossbred calves in ...

    African Journals Online (AJOL)

    Statistical model used for the analysis include sex of calf, calf genotype, year of birth, and season of birth. It also includes interaction between calf sex by year of birth and calf sex by season of birth. The effect of sex of calf, calf genotype and year of birth were highly significant (P<0.001) on birth weight. The interaction of calf ...

  11. Heterosis in Swazi-bred Maize Hybrids: The 1993 and 1994 Test ...

    African Journals Online (AJOL)

    Single cross test hybrids made in 1993 among these inbred lines (mostly S and S lines) were yield tested in two replications with parental and commercial checks in the 1993/94 and 1994/95 trial also included single cross test hybrids made in 1994. Trial mean grain yield was 5.5 Mg/ha in 1993/94 and 4.8 Mg/ha in 1994/95.

  12. Recent SUSY Results from CMS

    CERN Multimedia

    CERN. Geneva

    2012-01-01

    We present a summary of the recent results of searches for supersymmetry conducted by the CMS experiment. Several searches are reported using complementary final states and methods. The results presented include searches for stops and sbottoms, production of charginos and neutralinos, and R-parity violating signatures. Several of them are the first results of their kind from CMS, while others increased the mass reach significantly over previously published results from the LHC.

  13. An overview of JET results

    International Nuclear Information System (INIS)

    Adams, J.M.; Alladio, F.; Altmann, H.

    1989-01-01

    An overview is given of experimental results obtained on JET during 1988, and in particular of results at high total power input into plasmas with various configurations. An account is given of the various interpretations of these results and some of the difficulties encountered are related. The progress is summarised in terms of the projected D-T performance. (author)

  14. Aesthetic rhinoplasty: Avoiding unfavourable results

    Directory of Open Access Journals (Sweden)

    Kulwant S Bhangoo

    2013-01-01

    Full Text Available Rhinoplasty is one of the most challenging surgical procedures in plastic surgery. It is not surprising that a significant number of patients end up with unfavourable outcomes. Many of these unfavourable outcomes could be the result of poor judgment and wrong decision making. Most frequently, the unfavourable outcome is the result of errors in surgical technique. In this paper, unfavourable outcomes resulting from errors in surgical technique are discussed under the heading of each operative step. Poor placement of intra-nasal incision can result in internal valve obstruction. Bad columellar scars can result from errors during open rhinoplasty. Unfavourable results associated with skeletonisation are mentioned. Tip plasty, being the most difficult part of rhinoplasty, can result in lack of tip projection, asymmetry and deformities associated with placement of tip grafts. Over-resection of the lower lateral cartilages during tip plasty can also result in pinched nose, alar collapse causing external valve obstruction and other alar rim deformities. Humpectomy can result in open roof deformity, inverted V deformity and over-resection resulting in saddle nose. The so-called poly beak deformity is also a preventable unfavourable outcome when dealing with a large dorsal hump. Complications resulting from osteotomies include narrowing of nasal airway, open roof deformity, inverted V deformity and asymmetry of the bony wall resulting from incomplete or green stick fractures. Judicious use of grafts can be very rewarding. By the same token, grafts also carry with them the risk of complications. Allografts can result in recurrent infection, atrophy of the overlying skin and extrusion resulting in crippling deformities. Autografts are recommended by the author. Unfavourable results from autografts include displacement of graft, visibility of the graft edges, asymmetry, warping, and resorption.

  15. Planck 2013 results. I. Overview of products and scientific results

    DEFF Research Database (Denmark)

    Planck Collaboration,; Ade, P. A. R.; Aghanim, N.

    2013-01-01

    spectrum. The Planck values for some of these parameters and others derived from them are significantly different from those previously determined. Several large scale anomalies in the CMB temperature distribution detected earlier by WMAP are confirmed with higher confidence. Planck sets new limits...... of the cosmology parameters. In general, Planck results agree well with results from the measurements of baryon acoustic oscillations. Because the analysis of Planck polarization data is not yet as mature as the analysis of temperature data, polarization results are not released. We do, however, illustrate...

  16. Recent physics results from LEP

    International Nuclear Information System (INIS)

    Augustin, J.E.

    1990-12-01

    The LEP machine operations, the recent observation of transverse beam polarization, and the luminosity measurements are summarized. The results obtained up to now on the tests of the electroweak sector of the Standard Model are reviewed. This includes the Z neutral boson excitation curve parameters in hadronic and leptonic modes, the forward-backward asymmetries of the leptons, the detection of the polarization of the taus, and the corresponding results on the number of light neutrinos, on the electroweak coupling constants and mixing angle, and on the top quark mass. Some hadronic physics results and QCD studies are reported. The results for particle searches, notably the Higgs boson are summarized

  17. Latest Electroweak Results from CDF

    Energy Technology Data Exchange (ETDEWEB)

    Lancaster, Mark

    2010-05-01

    The latest results in electroweak physics from proton anti-proton collisions at the Fermilab Tevatron recorded by the CDF detector are presented. The results provide constraints on parton distribution functions, the mass of the Higgs boson and beyond the Standard Model physics.

  18. Heavy ion results from ATLAS

    CERN Document Server

    AUTHOR|(INSPIRE)INSPIRE-00241915; The ATLAS collaboration

    2017-01-01

    These proceedings provide an overview of the new results obtained with the ATLAS Detector at the LHC, which are presented in the Quark Matter 2017 conference. These results are covered in twelve parallel talks, one flash talk and eleven posters, and they are grouped into five areas: initial state, jet quenching, quarkonium production, longitudinal flow dynamics, and collectivity in small systems.

  19. Complexity Results in Epistemic Planning

    DEFF Research Database (Denmark)

    Bolander, Thomas; Jensen, Martin Holm; Schwarzentruber, Francois

    2015-01-01

    Epistemic planning is a very expressive framework that extends automated planning by the incorporation of dynamic epistemic logic (DEL). We provide complexity results on the plan existence problem for multi-agent planning tasks, focusing on purely epistemic actions with propositional preconditions......-hardness of the plan verification problem, which strengthens previous results on the complexity of DEL model checking....

  20. Customer interruption cost and results

    Energy Technology Data Exchange (ETDEWEB)

    Eua-Arporn, B.; Bisarnbutra, S. [Chulalongkorn Univ., Bangkok (Thailand)

    1997-12-31

    Results of a comprehensive study on short-term direct impacts and consumer interruption costs, incurred as a result of power supply interruption, were discussed. The emphasis was on questionnaire development, general responses and the average customer damage function of some selected sectors. The customer damage function was established for each category of customers (agriculture, industry, mining, wholesale, retail merchandising, residential, etc) as well as for different locations. Results showed that the average customer damage function depended mostly on customer category. Size and location were not significant factors. 5 refs., 7 tabs.

  1. PHENIX recent heavy flavor results

    Energy Technology Data Exchange (ETDEWEB)

    Lim, Sanghoon

    2014-06-15

    Cold nuclear matter (CNM) effects provide an important ingredient to interpret the results from heavy-ion collisions. Such effects include nuclear shadowing, intrinsic parton transverse momentum broadening, and initial patron energy loss. The measurement of heavy quark production is a good probe to study the CNM effects particularly on gluons, since heavy quarks are mainly produced via gluon fusions at RHIC energy. The PHENIX experiment has an ability to study the CNM effects by measuring leptons from heavy-flavor decay in a broad kinematic range. Comparisons of the results measured in different rapidity regions allow us to study modification of gluon density function in the Au nucleus depending on parton fractional momentum x. In addition, comparisons to the results from heavy-ion collisions (Au + Au and Cu + Cu) measured by PHENIX provide an insight into the role of CNM effects in such collisions. Recent PHENIX results on heavy quark production are discussed in this presentation.

  2. Selection of LHCb Physics Results

    Science.gov (United States)

    Schmidt, Burkhard

    2013-05-01

    LHCb is a dedicated flavour physics experiment at the LHC searching for physics beyond the Standard Model through precision measurements of CP-violating observables and the study of very rare decays of beauty- and charm-flavoured hadrons. In this article a selection of recent LHCb results is presented. Unless otherwise stated, the results are based on an integrated luminosity of 1 fb-1 accumulated during the year 2011 at √s = 7 TeV.

  3. Consolidated results 2000. Forecasts 2001

    International Nuclear Information System (INIS)

    2001-01-01

    This document presents an economic analysis of the Group Gaz De France consolidated results for the year 2000. The main topics are the evolution of the energy market, the great economic growth for the five businesses of the Group (exploration-production, trade, transport, distribution and services), financial results affected by the supply costs increase, the position reinforcement among the gas leaders in Europe and the highlights of 2000. (A.L.B.)

  4. Electroweak results from the tevatron

    Energy Technology Data Exchange (ETDEWEB)

    Wood, D. [Fermi National Accelerator Laboratory, Batavia, IL (United States)

    1997-01-01

    Electroweak results are presented from the CDF and DO experiments based on data collected in recent runs of the Fermilab Tevatron Collider. The measurements include the mass and width of the W boson, the production cross sections of the W and Z bosons, and the W charge asymmetry. Additional results come from studies of events with pairs of electroweak gauge bosons and include limits on anomalous couplings.

  5. Preliminary results from APE-100

    International Nuclear Information System (INIS)

    Bartoloni, A.; Battista, C.; Cabasino, S.; Marzano, F.; Paolucci, P.S.; Pech, J.; Rapuano, F.; Sarno, R.; Todesco, G.M.; Torelli, M.; Tross, W.; Vicini, P.; Tripiccione, R.; Cabibbo, N.; Salina, G.; Fucci, A.; Lubicz, V.; Maiani, L.; Martinelli, G.; Vladikas, A.

    1993-01-01

    We present the preliminary results obtained on the 6 Gigaflop prototype which is the building block of the APE-100 computer. Results are presented for pseudoscalar and vector mesons for the Wilson and the improved action with a statistics of about 100 configurations. Static heavy-light meson propagator have also been studied for different smeared operators. We find that large smearing (≥ 9) are bad projectors on the lightest pseudoscalar states. (orig.)

  6. Result-Based Public Governance

    DEFF Research Database (Denmark)

    Boll, Karen

    Within the public sector, many institutions are either steered by governance by targets or result-based governance. The former sets up quantitative internal production targets, while the latter advocates that production is planned according to outcomes which are defined as institution-produced ef......Within the public sector, many institutions are either steered by governance by targets or result-based governance. The former sets up quantitative internal production targets, while the latter advocates that production is planned according to outcomes which are defined as institution...... the performance measure that guides the inspectors’ inspection (or nudging) of the businesses. The analysis shows that although a result-based governance system is advocated on a strategic level, performance measures which are not ‘result-based’ are developed and used in the daily coordination of work. The paper...... explores how and why this state of affairs appears and problematizes the widespread use of result-based governance and nudging-techniques by public sector institutions....

  7. Planck 2013 results. I. Overview of products and scientific results

    CERN Document Server

    Ade, P.A.R.; Armitage-Caplan, C.; Arnaud, M.; Ashdown, M.; Atrio-Barandela, F.; Aumont, J.; Baccigalupi, C.; Banday, A.J.; Barreiro, R.B.; Bartelmann, M.; Bartlett, J.G.; Battaner, E.; Benabed, K.; Benoit, A.; Benoit-Levy, A.; Bernard, J.P.; Bersanelli, M.; Bielewicz, P.; Bobin, J.; Bock, J.J.; Bonaldi, A.; Bond, J.R.; Borrill, J.; Bouchet, F.R.; Boulanger, F.; Bowyer, J.W.; Bridges, M.; Bucher, M.; Burigana, C.; Butler, R.C.; Cappellini, B.; Cardoso, J.F.; Carr, R.; Casale, M.; Catalano, A.; Challinor, A.; Chamballu, A.; Chary, R.R.; Chen, X.; Chiang, L.Y.; Chiang, H.C.; Christensen, P.R.; Church, S.; Clements, D.L.; Colombi, S.; Colombo, L.P.L.; Couchot, F.; Coulais, A.; Crill, B.P.; Curto, A.; Cuttaia, F.; Danese, L.; Davies, R.D.; Davis, R.J.; de Bernardis, P.; de Rosa, A.; de Zotti, G.; Delabrouille, J.; Delouis, J.M.; Desert, F.X.; Dickinson, C.; Diego, J.M.; Dole, H.; Donzelli, S.; Dore, O.; Douspis, M.; Dunkley, J.; Dupac, X.; Efstathiou, G.; Ensslin, T.A.; Eriksen, H.K.; Falgarone, E.; Finelli, F.; Foley, S.; Forni, O.; Frailis, M.; Franceschi, E.; Freschi, M.; Fromenteau, S.; Gaier, T.C.; Galeotta, S.; Gallegos, J.; Gandolfo, B.; Ganga, K.; Giard, M.; Giardino, G.; Giraud-Heraud, Y.; Gonzalez-Nuevo, J.; Gorski, K.M.; Gratton, S.; Gregorio, A.; Gruppuso, A.; Haissinski, J.; Hansen, F.K.; Hanson, D.; Harrison, D.; Helou, G.; Henrot-Versille, S.; Hernandez-Monteagudo, C.; Herranz, D.; Hildebrandt, S.R.; Hivon, E.; Hobson, M.; Holmes, W.A.; Hornstrup, A.; Hovest, W.; Huffenberger, K.M.; Jaffe, T.R.; Jaffe, A.H.; Jewell, J.; Jones, W.C.; Juvela, M.; Kangaslahti, P.; Keihanen, E.; Keskitalo, R.; Kisner, T.S.; Kneissl, R.; Knoche, J.; Knox, L.; Kunz, M.; Kurki-Suonio, H.; Lagache, G.; Lahteenmaki, A.; Lamarre, J.M.; Lasenby, A.; Laureijs, R.J.; Lawrence, C.R.; Le Jeune, M.; Leach, S.; Leahy, J.P.; Leonardi, R.; Leon-Tavares, J.; Leroy, C.; Lesgourgues, J.; Liguori, M.; Lilje, P.B.; Linden-Vornle, M.; Lopez-Caniego, M.; Lowe, S.; Lubin, P.M.; Macias-Perez, J.F.; Maffei, B.; Maino, D.; Mandolesi, N.; Maris, M.; Marshall, D.J.; Martin, P.G.; Martinez-Gonzalez, E.; Masi, S.; Matarrese, S.; Matthai, F.; Mazzotta, P.; McDonald, A.; McGehee, P.; Meinhold, P.R.; Melchiorri, A.; Melin, J.B.; Mendes, L.; Mennella, A.; Migliaccio, M.; Miniscalco, R.; Mitra, S.; Miville-Deschenes, M.A.; Moneti, A.; Montier, L.; Morgante, G.; Mortlock, D.; Moss, A.; Munshi, D.; Murphy, J.A.; Naselsky, P.; Nati, F.; Natoli, P.; Netterfield, C.B.; Norgaard-Nielsen, H.U.; North, C.; Noviello, F.; Novikov, D.; Novikov, I.; O'Dwyer, I.J.; Osborne, S.; Oxborrow, C.A.; Paci, F.; Pagano, L.; Pajot, F.; Paladini, R.; Paoletti, D.; Partridge, B.; Pasian, F.; Patanchon, G.; Pearson, D.; Pearson, T.J.; Perdereau, O.; Perotto, L.; Perrotta, F.; Piacentini, F.; Piat, M.; Pierpaoli, E.; Pietrobon, D.; Plaszczynski, S.; Platania, P.; Pointecouteau, E.; Polenta, G.; Ponthieu, N.; Popa, L.; Poutanen, T.; Pratt, G.W.; Prezeau, G.; Prunet, S.; Puget, J.L.; Rachen, J.P.; Reach, W.T.; Rebolo, R.; Reinecke, M.; Remazeilles, M.; Renault, C.; Ricciardi, S.; Riller, T.; Ringeval, C.; Ristorcelli, I.; Rocha, G.; Rosset, C.; Rossetti, M.; Roudier, G.; Rowan-Robinson, M.; Rubino-Martin, J.A.; Rusholme, B.; Salerno, E.; Sandri, M.; Santos, D.; Savini, G.; Scott, D.; Seiffert, M.D.; Shellard, E.P.S.; Smoot, G.F.; Spencer, L.D.; Starck, J.L.; Stolyarov, V.; Stompor, R.; Sudiwala, R.; Sunyaev, R.; Sureau, F.; Sutton, D.; Suur-Uski, A.S.; Sygnet, J.F.; Tauber, J.A.; Tavagnacco, D.; Taylor, D.; Terenzi, L.; Texier, D.; Toffolatti, L.; Tomasi, M.; Tristram, M.; Tucci, M.; Tuovinen, J.; Turler, M.; Tuttlebee, M.; Umana, G.; Valenziano, L.; Valiviita, J.; Van Tent, B.; Varis, J.; Vibert, L.; Vielva, P.; Villa, F.; Vittorio, N.; Wade, L.A.; Wandelt, B.D.; Watson, R.; Watson, C.; White, M.; White, S.D.M.; Wilkinson, A.; Yvon, D.; Zacchei, A.; Zonca, A.

    2014-01-01

    The ESA's Planck satellite, dedicated to studying the early universe, was launched on May 2009 and has been surveying the microwave and submillimetre sky since August 2009. In March 2013, ESA and the Planck Collaboration publicly released the initial cosmology products based on the first 15.5 months of Planck operations, along with a set of scientific and technical papers and a web-based explanatory supplement. This paper describes the mission and its performance, and gives an overview of the processing and analysis of the data, the characteristics of the data, the main scientific results, and the science data products and papers in the release. Scientific results include robust support for the standard, six parameter LCDM model of cosmology and improved measurements for the parameters that define this model, including a highly significant deviation from scale invariance of the primordial power spectrum. The Planck values for some of these parameters and others derived from them are significantly different fr...

  8. CDF results on electroweak physics

    International Nuclear Information System (INIS)

    Frisch, H.J.

    1993-11-01

    The second major run of the bar pp Fermilab Tevatron collider has just ended on June 1. The CDF detector has accumulated almost five times the data sample of its previous 1988--1989 run. We present new results on the ratio of W to Z boson production cross-sections and on the charge asymmetry in W decay. We give a progress report on the measurement of the W mass. New results from the 1988--1989 data on Drell-Yan production and on W γ production are also presented

  9. Impossibility results for distributed computing

    CERN Document Server

    Attiya, Hagit

    2014-01-01

    To understand the power of distributed systems, it is necessary to understand their inherent limitations: what problems cannot be solved in particular systems, or without sufficient resources (such as time or space). This book presents key techniques for proving such impossibility results and applies them to a variety of different problems in a variety of different system models. Insights gained from these results are highlighted, aspects of a problem that make it difficult are isolated, features of an architecture that make it inadequate for solving certain problems efficiently are identified

  10. Results from Numerical General Relativity

    Science.gov (United States)

    Baker, John G.

    2011-01-01

    For several years numerical simulations have been revealing the details of general relativity's predictions for the dynamical interactions of merging black holes. I will review what has been learned of the rich phenomenology of these mergers and the resulting gravitational wave signatures. These wave forms provide a potentially observable record of the powerful astronomical events, a central target of gravitational wave astronomy. Asymmetric radiation can produce a thrust on the system which may accelerate the single black hole resulting from the merger to high relative velocity.

  11. Heavy flavor results from CMS

    CERN Document Server

    Ronchese, Paolo

    2017-01-01

    Heavy flavor particles produced in LHC $pp$ collisions at $7, 8,$ and $13~\\mathrm{TeV}$ constitute an excellent opportunity to test the standard model and probe for new physics effects. Recent results by the CMS Collaboration on heavy flavor production and decays are presented.

  12. Juridical utilization of dosimetric results

    International Nuclear Information System (INIS)

    Hebert, J.

    1976-01-01

    The problems of the legal use of the results of dosimetry, for the solution of an action for instance, are considered first with respect to civil and occasionally administrative third part liability law making a distinction between common law and the special regime of civil liability for nuclear damage, secondly with respect to social security law [fr

  13. New ATLAS Higgs physics results

    CERN Multimedia

    CERN. Geneva

    2014-01-01

    New Higgs physics results from the ATLAS experiment using the full Run-1 LHC dataset, corresponding to an integrated luminosity of approximately 25 fb-1, of proton-proton collisions at 7 TeV and 8 TeV, will be presented.

  14. Report of scientific results 1977

    International Nuclear Information System (INIS)

    1977-01-01

    The scientific progress report of the HMI for 1977 gives a survey of the main results of HMI research in the fields of neutron scattering, radiation damage in solids, reactor chemistry, trace element research in biomedicine, geochemistry, reactor operation, and radionuclide production. After this, short summaries are given of HMI publications and papers in the above fields. (HK) [de

  15. Results from the AMANDA telescope

    Energy Technology Data Exchange (ETDEWEB)

    Ahrens, J.; Bai, X.; Barwick, S.W.; Becka, T.; Becker, K.-H.; Bernardini, E.; Bertrand, D.; Binon, F.; Biron, A.; Boeser, S.; Botner, O.; Bouhali, O.; Burgess, T.; Carius, S.; Castermans, T.; Chirkin, D.; Conrad, J.; Cooley, J.; Cowen, D.F.; Davour, A.; De Clercq, C.; DeYoung, T.; Desiati, P.; Dewulf, J.-P.; Ekstroem, P.; Feser, T.; Gaisser, T.K.; Ganupati, R.; Gaug, M.; Geenen, H.; Gerhardt, L.; Goldschmidt, A.; Hallgren, A.; Halzen, F.; Hanson, K.; Hardtke, R.; Hauschildt, T.; Hellwig, M.; Herquet, Ph.; Hill, G.C.; Hulth, P.O.; Hultqvist, K.; Hundertmark, S.; Jacobsen, J.; Karle, A.; Koepke, L.; Kuehn, K.; Kowalski, M.; Lamoureux, J.I.; Leich, H.; Leuthold, M.; Lindahl, P.; Liubarsky, I.; Madsen, J.; Mandli, K.; Marciniewski, P.; Matis, H.S.; McParland, C.P.; Messarius, T.; Minaeva, Y.; Miocinovic, P.; Morse, R.; Nahnhauer, R.; Neunhoeffer, T.; Niessen, P.; Nygren, D.R.; Ogelman, H.; Olbrechts, Ph.; Perez de los Heros, C.; Pohl, A.C.; Price, P.B.; Przybylski, G.T.; Rawlins, K.; Resconi, E.; Rhode, W.; Ribordy, M.; Richter, S.; Rodriguez Martino, J.; Sander, H.-G.; Schmidt, T.; Schneider, D.; Schinarakis, K.; Schwarz, R.; Silvestri, A.; Solarz, M.; Spiczak, G.M.; Spiering, C.; Steele, D.; Steffen, P.; Stokstad, R.G.; Sudoff, P.; Sudoff, K.-H.; Sulanke, K.-H.; Taboada, I.; Thollander, L.; Tilav, S.; Wagner, W.; Walck, C.; Weinheimer, C.; Wiebusch, C.H.; Wiedemann, C.; Wischnewski, R.; Wissing, H.; Woschnagg, K.; Yodh, G.; Young, S

    2003-06-30

    We present results from the AMANDA high energy neutrino telescope located at the South Pole. They include measurements of the atmospheric neutrino flux, search for UHE point sources, and diffuse sources producing electromagnetic/hadronic showers at the detector or close to it.

  16. Recent results from lattice calculations

    OpenAIRE

    Hashimoto, Shoji

    2004-01-01

    Recent results from lattice QCD calculations relevant to particle physics phenomenology are reviewed. They include the calculations of strong coupling constant, quark masses, kaon matrix elements, and D and B meson matrix elements. Special emphasis is on the recent progress in the simulations including dynamical quarks.

  17. EO framing flight test results

    Science.gov (United States)

    Lareau, Andre G.

    1995-09-01

    Recon/Optical, Inc. (ROI) has pioneered the electro-optical (E-O) framing generation of sensors with the CA-260, a KS-87 form/fit camera with a wafer-scale focal plane array (FPA) containing a patented, on-chip, forward motion compensation (FMC) architecture. The technology has now matured to the state where production E-O framing cameras are form/fit replacing their former film counterparts. During this interim production phase, flight demonstrations and tests are continuing to prove that E-O framing produces high-quality imagery, is robust to various platforms and mission tactics, interoperable with existing and planned C3I architectures, affordable and available, and meets the war-fighters needs. This paper discusses flight test results of the CA-260 E-O framing sensor flown in the F-14A TARPS during September 1994. This demonstration provided some unique imagery permitting a comparison of low-light level, in-flight FMC-on versus FMC-off performance. A first-level comparison of the resulting imagery based upon predicted FMC performance and post- processing numerical analysis is presented. The results indicae that the patented FMC architecture performed as predicted, and that for low-light conditions resulting in limited SNR images, on-chip FMC can provide a significant image quality improvement over post- processing alternatives.

  18. Latest results from B factories

    CERN Document Server

    Ben Haim, Eli

    2015-01-01

    I will briefly review recent results from Babar and Belle. For example, I will discuss probes for new physics in radiative penguin decays and the CP asymmetry in B0-B0bar mixing. I will also discuss direct searches for new physics, such as a light Higgs resonance or long lived particles.

  19. Results from PLUTO at PETRA

    CERN Document Server

    Blobel, Volker

    1979-01-01

    Results obtained at the e/sup +/e/sup -/ storage ring PETRA by the PLUTO collaboration at c.m. energies of 13, 17 and 27.4 GeV are presented. New limits on QED cut-off parameters are determined from Bhabha scattering; at 27.4 GeV the limits are Lambda /sub +/>38 GeV and Lambda /sub -/>60 GeV. The measured values of the total hadronic cross section, and the study of the jet character of the hadronic events are well consistent with the expected production of b mesons (with q/sub b/=1/3), but do not require additional new quarks with charge 2/3. Hadronic events from two-photon exchange processes are observed with comparable rates as events from one-photon exchange. First results on the hadronic cross section in gamma gamma collisions are given. (8 refs).

  20. Tau physics results from SLD

    International Nuclear Information System (INIS)

    Daoudi, M.

    1996-01-01

    Results on τ physics at SLD are presented. They are based on 4,316 τ-pair events selected from a 150 k Z 0 data sample collected at the SLC. These results include measurements of the τ lifetime (τ r = 288.1 ± 6.1 ± 3.3 fs), the τ Michel parameters (ρ = 0.71 ± 0.09 ± 0.04, ζ = 1.03 ± 0.36 ± 0.05, and ζδ = 0.84 ± 0.27 ± 0.05), and the τ neutrino helicity (h ν = -0.81 ± 0.18 ± 0.03)

  1. First Physics Results from ALICE

    International Nuclear Information System (INIS)

    Peressounko, Dmitri; Castillo Castellanos, Javier; Belikov, Iouri

    2010-01-01

    ALICE is the LHC experiment dedicated to the study of heavy-ion collisions. The main purpose of ALICE is to investigate the properties of a state of deconfined nuclear matter, the Quark Gluon Plasma. Heavy flavour measurements will play a crucial role in this investigation. The physics programme of ALICE has started by studying proton-proton collisions at unprecedented high energies. We will present the first results on open heavy flavour and quarkonia in proton-proton collisions at √s = 7 TeV measured by the ALICE experiment at both mid- and forward-rapidities. We will conclude with the prospects for heavy flavour and quarkonium measurements in both proton-proton and nucleus-nucleus collisions. Also presented are first results of neutral meson reconstruction and its perspectives, as well as further physics studies. (author)

  2. Results of recent LOFT experiments

    International Nuclear Information System (INIS)

    Leach, L.P.; Hanson, D.J.; Batt, D.L.

    1982-01-01

    Five experiments were performed in the Loss-of-Fluid Test (LOFT) facility during the past year. The experiments conducted spanned a wide range of potential accident scenarios, including large and small break loss-of-coolant accidents (LOCAs), control rod withdrawal accidents, uncontrolled boron dilution, and anticipated transients without scram (ATWS). This summary describes these experiments and presents results available from the experiments and experiment prediction calculations. A brief overview is given for the remaining experiment planned in the LOFT Program

  3. Results of the AMS experiment

    CERN Document Server

    CERN. Geneva

    1999-01-01

    The AMS experiment is a magnetic spectrometer designed and constructed to measure particles in space. For its first flight, the detector used a permanent magnet together with a precision silicon tracking detector, time-of-flight counters and aerogel counters. The first 10-day flight of AMS took place on June 2, 1998 on board the NASA Space Shuttle Discovery. The construction of the AMS detector, the first results of the shuttle flight and the future plans of AMS will be presented.

  4. Top physics results with ATLAS

    CERN Document Server

    Massa, Lorenzo; The ATLAS collaboration

    2015-01-01

    This paper contains some of the most recent results on top-quark physics obtained by the ATLAS collaboration from the analysis of $pp$ collisions at $\\sqrt{s}=7$ TeV and 8 TeV at the Large Hadron Collider. Measurement of total and differential top-quark pair ($t\\bar{t}$), single top and $t\\bar{t}+\\gamma$ production cross sections and some top properties like mass, charge asymmetry and spin correlation are presented.

  5. LHC Results Highlights (CLASHEP 2013)

    CERN Document Server

    Gonzalez, O.

    2015-05-22

    The good performance of the LHC provided enough data at 7 TeV and 8 TeV to allow the experiments to perform very competitive measurements and to expand the knowledge about the fundamental interaction far beyond that from previous colliders. This report summarizes the highlights of the results obtained with these data samples by the four large experiments, covering all the topics of the physics program and focusing on those exploiting the possibilities of the LHC.

  6. Results on light quark spectroscopy

    International Nuclear Information System (INIS)

    Bienlein, J.K.; Harjes, J.; Kolanoski, H.

    1991-12-01

    This report contains a survey article of resonance production by the Crystal Ball Collaboration from J. K. Bienlein, an article on CELLO results for γγΠ*p* +- - from J. Harjes, a survey article on the production of scalar and tensor mesons in two-photon collisions, and an article on the study of the a 1 resonance by τ decays, the last two articles are both from H. Kolanoski. See hints under the relevant topics. (HSI)

  7. Geometric Results for Compressible Magnetohydrodynamics

    OpenAIRE

    Arter, Wayne

    2013-01-01

    Recently, compressible magnetohydrodynamics (MHD) has been elegantly formulated in terms of Lie derivatives. This paper exploits the geometrical properties of the Lie bracket to give new insights into the properties of compressible MHD behaviour, both with and without feedback of the magnetic field on the flow. These results are expected to be useful for the solution of MHD equations in both tokamak fusion experiments and space plasmas.

  8. Audit result and its users

    Directory of Open Access Journals (Sweden)

    Shalimova Nataliya S.

    2014-01-01

    Full Text Available The article identifies essence of the “audit result” and “users of audit result” notions and characteristics of the key audit results user. It shows that in order to give a wide characteristic of users it is expedient to unite all objects, which could be used (audit report, fact of refusal to conduct audit and information that is submitted to managers in the process of audit with the term “audit result” and classify it depending on the terms of submission by final and intermediate result. The article offers to define audit results user as a person, persons or category of persons for whom the auditor prepares the audit report and, in cases, envisaged by international standards of the audit and domestic legislative and regulatory acts, provides other additional information concerning audit issues. In order to identify the key audit results user the article distributes all audit tasks into two groups depending on possibilities of identification of users. The article proves that the key user should be identified especially in cases of a mandatory audit and this process should go in interconnection with the mechanism of allocation of a key user of financial reports. It offers to consider external users with direct financial interests, who cannot request economic subjects directly to provide information and who should rely on general financial reports and audit report when receiving significant portion of information they need, as the key user. The article makes proposals on specification of the categorical mechanism in the sphere of audit, which are the basis for audit quality assessment, identification of possibilities and conditions of appearance of the necessary and sufficient trust to the auditor opinion.

  9. Physics results from polarized DIS

    International Nuclear Information System (INIS)

    Ramsey, G. P.

    1998-01-01

    We have extracted polarized nucleon distributions from recent data at CERN, SLAC and DESY. The flavor-dependent valence and sea quark spin distributions are determined for each experiment. We take into account possible differences in the up and down sea distributions, and assume that the strange sea contribution is suppressed by mass effects. Physics results determined from different experiments are compared, including higher order corrections

  10. Physics results from polarized DIS.

    Energy Technology Data Exchange (ETDEWEB)

    Ramsey, G. P.

    1998-03-23

    We have extracted polarized nucleon distributions from recent data at CERN, SLAC and DESY. The flavor-dependent valence and sea quark spin distributions are determined for each experiment. We take into account possible differences in the up and down sea distributions, and assume that the strange sea contribution is suppressed by mass effects. Physics results determined from different experiments are compared, including higher order corrections.

  11. Presentation of RTE results 2003

    International Nuclear Information System (INIS)

    2004-01-01

    For RTE, the financial year 2003 was marked by a number of achievements: our financial performances registered a clear improvement, above objectives, with turnover growing strongly; net income reached levels almost three times higher than those recorded in 2002; the economic rate of return rose to 7.1%; and debt was reduced by 470 Meuros. These results are explained by the substantial improvement in productivity, which has risen by 5% per year on average over the last three years

  12. Recent results from Jefferson Lab

    International Nuclear Information System (INIS)

    Smith, E.

    2000-01-01

    Precision measurements of the structure of nucleons and nuclei in the regime of strong interaction QCD are now possible with the availability of high current polarized electron beams, polarized targets, and recoil polarimeters, in conjunction with modern spectrometers and detector instrumentation. The authors present some recent results from the Jefferson Lab on the charge and current distributions of nucleons and nuclei. They also review measurements which relate physics at small distances to the regime where strong interaction QCD is the relevant theory

  13. Supersymmetry results at the Tevatron

    International Nuclear Information System (INIS)

    Badaud, Frederique

    2007-01-01

    The results for searches for Supersymmetry by the CDF and D0 collaborations in pp-bar collisions at √s=1.96 TeV are presented here. Searches for chargino/neutralino and the lightest stop, as well as scenarios with R-parity violation are focused here. The integrated luminosity analyzed ranges from 300 to 800 pb -1 depending on the search. Further informations can be found on the public web pages of the two experiments. (author)

  14. First half 2006 financial results

    International Nuclear Information System (INIS)

    2006-09-01

    Areva provides technological solutions for highly reliable nuclear power generation and electricity transmission and distribution. The group is the world leader in nuclear power and the only company to cover all industrial activities in this field. This Press release presents the first half 2006 financial results: the overall performance and the performance by division (front end, reactors and services, back end, transmission and distribution). (A.L.B.)

  15. Analysis of Benchmark 2 results

    International Nuclear Information System (INIS)

    Bacha, F.; Lefievre, B.; Maillard, J.; Silva, J.

    1994-01-01

    The code GEANT315 has been compared to different codes in two benchmarks. We analyze its performances through our results, especially in the thick target case. In spite of gaps in nucleus-nucleus interaction theories at intermediate energies, benchmarks allow possible improvements of physical models used in our codes. Thereafter, a scheme of radioactive waste burning system is studied. (authors). 4 refs., 7 figs., 1 tab

  16. SPQR -- Spectroscopy: Prospects, Questions & Results

    Energy Technology Data Exchange (ETDEWEB)

    Pennington, Michael R. [JLAB

    2014-06-01

    Tremendous progress has been made in mapping out the spectrum of hadrons over the past decade with plans to make further advances in the decade ahead. Baryons and mesons, both expected and unexpected, have been found, the results of precision experiments often with polarized beams, polarized targets and sometimes polarization of the final states. All these hadrons generate poles in the complex energy plane that are consequences of strong coupling QCD. They reveal how this works.

  17. Presentation of RTE results 2003

    International Nuclear Information System (INIS)

    2003-01-01

    In 2003, RTE recorded a clear improvement in its financial results, and continued its debt reduction programme. The financial year 2003 was marked by a clear improvement in RTE's financial performance: results exceeded objectives, with turnover growing strongly, net income reached levels almost three times higher than those recorded in 2002, the economic rate of return rose to 7.1%, and debt was reduced by 470 Meuros. These results are explained by the substantial improvement in productivity, which has risen by 5% per year on average over the last three years. Net income has almost tripled due to RTE's improved productivity completed by a significant rise in its turnover and stabilizing operating costs RTE's finances therefore remain healthy, enabling the company to continue its debt reduction programme. Satisfactory economic and financial rates of return. Deadlines facing RTE in 2004: in application of the second European Directive, adopted on 26 June 2003, RTE faces two major deadlines in 2004: - the implementation of the 2. phase in the process of opening up the French electricity market, - its legal independence. On 1 July 2004, the market will be opened up to competition for all professional customers. At that date RTE, like all other electricity transmission system operators (TSOs) in the European Union, should be a legally independent body. The new central role of TSOs in Europe: how are electricity transmission system operators in other EU countries organised?

  18. Presentation of the results 97

    International Nuclear Information System (INIS)

    1998-01-01

    Gaz de France (GDF) presents in a press kit the main results achieved in 1997. The European community has formulated a project of definition of rules concerning the natural gas market. Minima values for annual consumptions have been defined and the consumption and use of natural gas in EC countries is described. The financial results of GDF in 1997 are compared with previous years. Net sales grew by nearly 1 billion french francs to reach 55 billion. Overall sales were down by 4% but the share of natural gas in french energy consumption increased and sales to industrial users went up in particular due to new cogeneration plants installed in 1996. A comparison of gas prices in Europe is given for the years 1985 to 1998. The efforts of GDF to offer increased quality of services concerning in particular safety aspects as checking programs and installation of new safeguard appliances are described. The efforts of GDF to increase the energy market share of natural gas resulted in the development of new products like cogeneration, air conditioning and fuels for automotive needs. (C.B.)

  19. Results Evaluation in Reduction Rhinoplasty

    Directory of Open Access Journals (Sweden)

    Arima, Lisandra Megumi

    2011-01-01

    Full Text Available Introduction: Final results evaluation after rhinoplasty is a not a topic widely studied from the patient's viewpoint. Objective:Evaluate the satisfaction of the patients submitted to reduction rhinoplasty, from the questionnaire Rhinoplasty Outcomes Evaluation (ROE. Method: Longitudinal study, retrospective cut type, of the preoperative and postoperative satisfaction. The sample was composed by 28 patients who were submitted to rhinoplasty and answered the ROE questionnaire. Three variables were obtained: satisfaction note that the patient had with his/her image before the surgery; note of satisfaction with the current appearance; the difference of the average satisfaction notes between postoperative and preoperative approaches. Results: The postoperative note was higher than the preoperative in all patients. We noticed a difference between the average of the postoperative and preoperative of 48.3 (p75 considered to be an excellent outcome (67.9%. Conclusions: The ROE questionnaire is a helpful tool to show the satisfaction of the patient submitted to reduction rhinoplasty. About 92% of the patients submitted to reduction rhinoplasty consider the postoperative result to be good or excellent.

  20. Heavy Flavour results from Tevatron

    Energy Technology Data Exchange (ETDEWEB)

    Borissov, G.; /Lancaster U.

    2012-06-01

    The CDF and D0 experiments finalize the analysis of their full statistics collected in the p{bar p} collisions at a center-of-mass energy of {radical}s = 1.96 TeV at the Fermilab Tevatron collider. This paper presents several new results on the properties of hadrons containing heavy b- and c-quarks obtained by both collaborations. These results include the search for the rare decays B{sup 0}, B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -} (CDF), the study of CP asymmetry in B{sub s} {yields} J{psi}{phi} decay (CDF, D0), the measurement of the like-sign dimuon charge asymmetry (D0), the measurement of CP asymmetry in D{sup 0} {yields} K{sup +}K{sup -} and D{sup 0} {yields} {pi}{sup +}{pi}{sup -} decays (CDF), and the new measurement of the B{sub s} {yields} D{sub s}{sup (*)+} D{sub s}{sup (*)-} branching fraction (CDF). Both experiments still expect to produce more results on the properties of heavy flavours.

  1. Planck 2015 results: I. Overview of products and scientific results

    DEFF Research Database (Denmark)

    Adam, R.; Ade, P. A R; Aghanim, N.

    2016-01-01

    Collaboration released the second set of cosmology products based ondata from the entire Planck mission, including both temperature and polarization, along with a set of scientific and technical papers and a web-based explanatory supplement. This paper gives an overview of the main characteristics of the data...... Galactic and extragalactic sources (including separate catalogues of Sunyaev-Zeldovich clusters and Galactic cold clumps), and extensive simulations of signals and noise used in assessing uncertainties and the performance of the analysis methods. The likelihood code used to assess cosmological models...... against the Planck data is described, along with a CMB lensing likelihood. Scientific results include cosmological parameters derived from CMB power spectra, gravitational lensing, and cluster counts, as well as constraints on inflation, non-Gaussianity, primordial magnetic fields, dark energy...

  2. Planck 2015 results. I. Overview of products and scientific results

    CERN Document Server

    Adam, R.; Aghanim, N.; Akrami, Y.; Alves, M.I.R.; Arnaud, M.; Arroja, F.; Aumont, J.; Baccigalupi, C.; Ballardini, M.; Banday, A.J.; Barreiro, R.B.; Bartlett, J.G.; Bartolo, N.; Basak, S.; Battaglia, P.; Battaner, E.; Battye, R.; Benabed, K.; Benoit, A.; Benoit-Levy, A.; Bernard, J.P.; Bersanelli, M.; Bertincourt, B.; Bielewicz, P.; Bonaldi, A.; Bonavera, L.; Bond, J.R.; Borrill, J.; Bouchet, F.R.; Boulanger, F.; Bucher, M.; Burigana, C.; Butler, R.C.; Calabrese, E.; Cardoso, J.F.; Carvalho, P.; Casaponsa, B.; Castex, G.; Catalano, A.; Challinor, A.; Chamballu, A.; Chary, R.R.; Chiang, H.C.; Chluba, J.; Christensen, P.R.; Church, S.; Clemens, M.; Clements, D.L.; Colombi, S.; Colombo, L.P.L.; Combet, C.; Comis, B.; Contreras, D.; Couchot, F.; Coulais, A.; Crill, B.P.; Cruz, M.; Curto, A.; Cuttaia, F.; Danese, L.; Davies, R.D.; Davis, R.J.; de Bernardis, P.; de Rosa, A.; de Zotti, G.; Delabrouille, J.; Delouis, J.M.; Desert, F.X.; Di Valentino, E.; Dickinson, C.; Diego, J.M.; Dolag, K.; Dole, H.; Donzelli, S.; Dore, O.; Douspis, M.; Ducout, A.; Dunkley, J.; Dupac, X.; Efstathiou, G.; Eisenhardt, P.R.M.; Elsner, F.; Ensslin, T.A.; Eriksen, H.K.; Falgarone, E.; Fantaye, Y.; Farhang, M.; Feeney, S.; Fergusson, J.; Fernandez-Cobos, R.; Feroz, F.; Finelli, F.; Florido, E.; Forni, O.; Frailis, M.; Fraisse, A.A.; Franceschet, C.; Franceschi, E.; Frejsel, A.; Frolov, A.; Galeotta, S.; Galli, S.; Ganga, K.; Gauthier, C.; Genova-Santos, R.T.; Gerbino, M.; Ghosh, T.; Giard, M.; Giraud-Heraud, Y.; Giusarma, E.; Gjerlow, E.; Gonzalez-Nuevo, J.; Gorski, K.M.; Grainge, K.J.B.; Gratton, S.; Gregorio, A.; Gruppuso, A.; Gudmundsson, J.E.; Hamann, J.; Handley, W.; Hansen, F.K.; Hanson, D.; Harrison, D.L.; Heavens, A.; Helou, G.; Henrot-Versille, S.; Hernandez-Monteagudo, C.; Herranz, D.; Hildebrandt, S.R.; Hivon, E.; Hobson, M.; Holmes, W.A.; Hornstrup, A.; Hovest, W.; Huang, Z.; Huffenberger, K.M.; Hurier, G.; Ilic, S.; Jaffe, A.H.; Jaffe, T.R.; Jin, T.; Jones, W.C.; Juvela, M.; Karakci, A.; Keihanen, E.; Keskitalo, R.; Kiiveri, K.; Kim, J.; Kisner, T.S.; Kneissl, R.; Knoche, J.; Krachmalnicoff, N.; Kunz, M.; Kurki-Suonio, H.; Lacasa, F.; Lagache, G.; Lahteenmaki, A.; Lamarre, J.M.; Langer, M.; Lasenby, A.; Lattanzi, M.; Lawrence, C.R.; Le Jeune, M.; Leahy, J.P.; Lellouch, E.; Leonardi, R.; Leon-Tavares, J.; Lesgourgues, J.; Levrier, F.; Lewis, A.; Liguori, M.; Lilje, P.B.; Linden-Vornle, M.; Lindholm, V.; Liu, H.; Lopez-Caniego, M.; Lubin, P.M.; Ma, Y.Z.; Macias-Perez, J.F.; Maggio, G.; Mak, D.S.Y.; Mandolesi, N.; Mangilli, A.; Marchini, A.; Marcos-Caballero, A.; Marinucci, D.; Marshall, D.J.; Martin, P.G.; Martinelli, M.; Martinez-Gonzalez, E.; Masi, S.; Matarrese, S.; Mazzotta, P.; McEwen, J.D.; McGehee, P.; Mei, S.; Meinhold, P.R.; Melchiorri, A.; Melin, J.B.; Mendes, L.; Mennella, A.; Migliaccio, M.; Mikkelsen, K.; Mitra, S.; Miville-Deschenes, M.A.; Molinari, D.; Moneti, A.; Montier, L.; Moreno, R.; Morgante, G.; Mortlock, D.; Moss, A.; Mottet, S.; Muenchmeyer, M.; Munshi, D.; Murphy, J.A.; Narimani, A.; Naselsky, P.; Nastasi, A.; Nati, F.; Natoli, P.; Negrello, M.; Netterfield, C.B.; Norgaard-Nielsen, H.U.; Noviello, F.; Novikov, D.; Novikov, I.; Olamaie, M.; Oppermann, N.; Orlando, E.; Oxborrow, C.A.; Paci, F.; Pagano, L.; Pajot, F.; Paladini, R.; Pandolfi, S.; Paoletti, D.; Partridge, B.; Pasian, F.; Patanchon, G.; Pearson, T.J.; Peel, M.; Peiris, H.V.; Pelkonen, V.M.; Perdereau, O.; Perotto, L.; Perrott, Y.C.; Perrotta, F.; Pettorino, V.; Piacentini, F.; Piat, M.; Pierpaoli, E.; Pietrobon, D.; Plaszczynski, S.; Pogosyan, D.; Pointecouteau, E.; Polenta, G.; Popa, L.; Pratt, G.W.; Prezeau, G.; Prunet, S.; Puget, J.L.; Rachen, J.P.; Racine, B.; Reach, W.T.; Rebolo, R.; Reinecke, M.; Remazeilles, M.; Renault, C.; Renzi, A.; Ristorcelli, I.; Rocha, G.; Roman, M.; Romelli, E.; Rosset, C.; Rossetti, M.; Rotti, A.; Roudier, G.; d'Orfeuil, B.Rouille; Rowan-Robinson, M.; Rubino-Martin, J.A.; Ruiz-Granados, B.; Rumsey, C.; Rusholme, B.; Said, N.; Salvatelli, V.; Salvati, L.; Sandri, M.; Sanghera, H.S.; Santos, D.; Saunders, R.D.E.; Sauve, A.; Savelainen, M.; Savini, G.; Schaefer, B.M.; Schammel, M.P.; Scott, D.; Seiffert, M.D.; Serra, P.; Shellard, E.P.S.; Shimwell, T.W.; Shiraishi, M.; Smith, K.; Souradeep, T.; Spencer, L.D.; Spinelli, M.; Stanford, S.A.; Stern, D.; Stolyarov, V.; Stompor, R.; Strong, A.W.; Sudiwala, R.; Sunyaev, R.; Sutter, P.; Sutton, D.; Suur-Uski, A.S.; Sygnet, J.F.; Tauber, J.A.; Tavagnacco, D.; Terenzi, L.; Texier, D.; Toffolatti, L.; Tomasi, M.; Tornikoski, M.; Tristram, M.; Troja, A.; Trombetti, T.; Tucci, M.; Tuovinen, J.; Turler, M.; Umana, G.; Valenziano, L.; Valiviita, J.; Van Tent, B.; Vassallo, T.; Vidal, M.; Viel, M.; Vielva, P.; Villa, F.; Wade, L.A.; Walter, B.; Wandelt, B.D.; Watson, R.; Wehus, I.K.; Welikala, N.; Weller, J.; White, M.; White, S.D.M.; Wilkinson, A.; Yvon, D.; Zacchei, A.; Zibin, J.P.; Zonca, A.

    2016-01-01

    The European Space Agency's Planck satellite, dedicated to studying the early Universe and its subsequent evolution, was launched 14~May 2009 and scanned the microwave and submillimetre sky continuously between 12~August 2009 and 23~October 2013. In February~2015, ESA and the Planck Collaboration released the second set of cosmology products based on data from the entire Planck mission, including both temperature and polarization, along with a set of scientific and technical papers and a web-based explanatory supplement. This paper gives an overview of the main characteristics of the data and the data products in the release, as well as the associated cosmological and astrophysical science results and papers. The science products include maps of the cosmic microwave background (CMB), the thermal Sunyaev-Zeldovich effect, and diffuse foregrounds in temperature and polarization, catalogues of compact Galactic and extragalactic sources (including separate catalogues of Sunyaev-Zeldovich clusters and Galactic col...

  3. Overview of the FTU results

    International Nuclear Information System (INIS)

    Alladio, F.; Angelini, B.; Apicella, M.L.

    2001-01-01

    An overview over the Frascati Tokamak Upgrade results during the period 1996-1998 is presented. Most of the activity has been devoted to the investigation of the electron heat transport with flat/nonmonotonic safety factor profiles. Up to 14 keV of electron temperature have been obtained using electron cyclotron resonance heating (ECRH) on the current ramp. The transport analysis shows a very low electron heat transport in the region with flat/monotonic safety factor profile. The electron thermal conductivity is strongly dependent on the MHD activity and it drops to values of the order 0.1m 2 /s in the absence of MHD fluctuations. Upon varying the resonance position in steady state conditions the effect of the ECRH on the sawtooth stabilization has been also investigated. Lower hybrid current drive studies have been performed in order to investigate the dependence of the current drive efficiency with density. Previous results of the Alcator C tokamak pointed out that at high density rather low efficiency values were obtained. The investigation carried out on FTU shows that such a result can be explained as due to the electron temperature dependence of the current drive efficiency. No degradation of the current drive efficiency is indeed observed on FTU even at density values of the order 1020m -3 . Ion Bernstein wave (IBW) heating studies have been also carried out in order to check the behaviour of wave-plasma coupling which is found in agreement with linear theory. Finally, impurity transport studies have been carried out. It has been possible to have a direct measurement of the flux of Mo33 which turns out to be in agreement with the expectation of quasilinear theory. (author)

  4. Results from DEMONA aerosol experiments

    International Nuclear Information System (INIS)

    Kanzleiter, T.; Wolf, L.; Schoeck, W.

    1987-01-01

    In the DEMONA experiments the behavior of aerosols released into a large dry PWR containment during a core meltdown accident was investigated by means of a 640 m 3 model containment. After performance of eight experiments with quasi-single-compartment containment geometry and one multi-compartment experiment, the DEMONA project is being completed by evaluating and recalculating the measured results. Up to now, good agreement between experiment and model calculations was achieved only for simple test conditions. Adequate modeling of more complicated test conditions requires additional analytical efforts

  5. Results of nuclear fusion development

    International Nuclear Information System (INIS)

    Yamamoto, Kenzo

    1975-01-01

    Compared with the nuclear fission research which followed that in advanced countries, Japan has treaded on its own track in nuclear fusion development; in the former, she had been far behind other leading countries. Characteristic of the efforts in Japan is the collaboration with educational institutions. Works are now carried out mainly in Tokamak plasma confinement, though other means being studied simultaneously. The nation's fusion research program is the realization of a fusion reactor at the turn of the present century, based on the world-level results attained with Tokamak. Past developments in the nuclear fusion research, the current status, and aspects for the future are discribed. (Mori, K.)

  6. ATLAS Run II Exotics Results

    CERN Document Server

    ATLAS Collaboration; The ATLAS collaboration

    2016-01-01

    While Standard Model is in a good shape especially after Higgs boson discovery, there are a lot of questions beyond SM. The ATLAS detector is performing about 50 Exotics searches addressed these questions. This talk is discussing some of them with datasets collected during the 2015-2016 LHC run from 3 fb^-1 to 18 fb^-1 of proton-proton collisions at 13 TeV centre of mass energy . Results on searches for resonances decaying into vector boson or fermions, for vector like quarks, for dark matter, and for other new phenomena using these data will be presented.

  7. Results from IceCube

    Directory of Open Access Journals (Sweden)

    DeYoung Tyce

    2016-01-01

    Full Text Available Data from the IceCube Neutrino Observatory have revealed the existence of a flux of high energy neutrinos of extraterrestrial origin, which is observed in a number of analyses spanning different energy ranges, fields of view, and neutrino flavors. The current data are consistent with an isotropic, equal-flavor flux described by a simple power law spectrum, but deviations from this simple model cannot yet be constrained with high precision. The existing observations in this area are reviewed, along with recent results on dark matter searches and observations of cosmic rays.

  8. Overview of recent ALICE results

    CERN Document Server

    Gunji, Taku

    2016-01-01

    The ALICE experiment explores the properties of strongly interacting QCD matter at extremely high temperatures created in Pb-Pb collisions at LHC and provides further insight into small-system physics in (high-multiplicity) pp and p-Pb collisions. The ALICE collaboration presented 27 parallel talks, 50 posters, and 1 flash talk at Quark Matter 2015 and covered various topics including collective dynamics, correlations and fluctuations, heavy flavors, quarkonia, jets and high $p_{\\rm T}$ hadrons, electromagnetic probes, small system physics, and the upgrade program. This paper highlights some of the selected results.

  9. First half 2005 financial results

    International Nuclear Information System (INIS)

    2005-01-01

    With manufacturing facilities in over 40 countries and a sales network in over 100, AREVA offers customers technological solutions for nuclear power generation and electricity transmission and distribution. The group also provides interconnect systems to the telecommunications, computer and automotive markets. This document presents the first half 2005 financial results of the group: 1 - overall performance: sales revenue, operating income, consolidated net income, operating cash flow, balance sheet; 2 - outlook; 3 - performance by business division: front-end division, reactors and services division, back end division, transmission and distribution division, connectors division

  10. RSG Deployment Case Testing Results

    Energy Technology Data Exchange (ETDEWEB)

    Owsley, Stanley L.; Dodson, Michael G.; Hatchell, Brian K.; Seim, Thomas A.; Alexander, David L.; Hawthorne, Woodrow T.

    2005-09-01

    The RSG deployment case design is centered on taking the RSG system and producing a transport case that houses the RSG in a safe and controlled manner for transport. The transport case was driven by two conflicting constraints, first that the case be as light as possible, and second that it meet a stringent list of Military Specified requirements. The design team worked to extract every bit of weight from the design while striving to meet the rigorous Mil-Spec constraints. In the end compromises were made primarily on the specification side to control the overall weight of the transport case. This report outlines the case testing results.

  11. Recent results for Mark III

    International Nuclear Information System (INIS)

    Brient, J.C.

    1987-12-01

    This paper presents recent results from the Mark III detector at SPEAR, in the open charm sector. The first topic discussed is the reanalysis of the direct measurement of the D hadronic branching fractions, where a detailed study has been made of the Cabibbo suppressed and multi-π 0 's D decays backgrounds in the double tag sample. Next, the Dalitz plot analysis of the D decays to Kππ is presented, leading to the relative fractions of three-body versus pseudoscalarvector decays. 7 refs., 5 figs

  12. Optical Array Processor: Laboratory Results

    Science.gov (United States)

    Casasent, David; Jackson, James; Vaerewyck, Gerard

    1987-01-01

    A Space Integrating (SI) Optical Linear Algebra Processor (OLAP) is described and laboratory results on its performance in several practical engineering problems are presented. The applications include its use in the solution of a nonlinear matrix equation for optimal control and a parabolic Partial Differential Equation (PDE), the transient diffusion equation with two spatial variables. Frequency-multiplexed, analog and high accuracy non-base-two data encoding are used and discussed. A multi-processor OLAP architecture is described and partitioning and data flow issues are addressed.

  13. Reporting of Diagnostic Cytogenetic Results.

    Science.gov (United States)

    Giersch, Anne B S; Bieber, Frederick R; Dubuc, Adrian M; Fletcher, Jonathan A; Ligon, Azra H; Mason-Suares, Heather; Morton, Cynthia C; Weremowicz, Stanislawa; Xiao, Sheng; Dal Cin, Paola

    2016-04-01

    This appendix, developed by the staff at the Center for Advanced Molecular Diagnostics in the Department of Pathology at the Brigham and Women's Hospital, includes a comprehensive list of current "macros" or standardized statements used to facilitate reporting of cytogenetic results. These are provided as a useful reference for other laboratories. The statements are organized under the general categories of constitutional or acquired abnormalities and subdivided into analysis type (GTG-banding, FISH, or chromosomal microarray). Multi-specimen usage macros are included that can be applied to two or more specimen types. Copyright © 2016 John Wiley & Sons, Inc.

  14. Recent results from Jefferson Lab

    International Nuclear Information System (INIS)

    Volker D. Burkert

    1999-01-01

    Recent results on studies of the structure of nucleons and nuclei in the regime of strong interaction QCD are discussed. Use of high current polarized electron beams, polarized targets, and recoil polarimeters, in conjunction with modern spectrometers and detector instrumentation allow much more detailed studies of nucleon and nuclear structure than has been possible in the past. The CEBAF accelerator at Jefferson Lab was build to study the internal structure of hadrons in a regime where confinement is important and strong interaction QCD is the relevant theory. They author discusses how the first experiments already make significant contributions towards an improved understanding of hadronic structure

  15. Recent Results from Jefferson Lab

    International Nuclear Information System (INIS)

    Volker Burkert

    2000-03-01

    Recent results on studies of the structure of nucleons and nuclei in the regime of strong interaction QCD are discussed. Use of high current polarized electron beams, polarized targets, and recoil polarimeters, in conjunction with modern spectrometers and detector instrumentation allow much more detailed studies of nucleon and nuclear structure than has been possible in the past. The CEBAF accelerator at Jefferson Lab was built to study the internal structure of hadrons in a regime where confinement is important and strong interaction QCD is the relevant theory. I discuss how the first experiments already make significant contributions towards an improved understanding of hadronic structure

  16. Recent CMS B physics results

    CERN Document Server

    Polikarpov, Sergey

    2017-01-01

    Various recent CMS B physics results are reported, including measurement of B hadron lifetimes; observation of $\\Upsilon\\mathrm{(1S)}$ pair production; angular analysis of the rare decay $\\mathrm{B}^0\\rightarrow\\mathrm{K}^{*0}\\mu^{+}\\mu^{-}$; search for X(5568) state. All analyses are performed using data collected by the CMS experiment at the LHC in pp collisions at $\\sqrt{s}=8$\\,TeV, which corresponds to an integrated luminosity of about $20\\,\\mathrm{fb}^{-1}$.

  17. Recent photon results from ATLAS

    CERN Document Server

    Glasman, Claudia; The ATLAS collaboration

    2017-01-01

    The production of prompt isolated photons at hadron colliders provides a stringent test of perturbative QCD and can be used to probe the gluon density function of the proton. The ATLAS collaboration has performed precise measurements of the inclusive production o f isolated prompt photons at a center-of-mass energy of 13 TeV, differential in both rap idity and the photon transverse momentum. In addition, the integrated and differential c ross sections for isolated photon pair production 8 TeV have been measured. The results are compared with state-of-the-art theory predictions at NLO in QCD and with predictions of several MC generators.

  18. Results of Austin Moore replacement.

    Directory of Open Access Journals (Sweden)

    Jadhav A

    1996-04-01

    Full Text Available Forty cases of Austin Moore Replacement done for transcervical fractures of the femur in patients were reviewed after a period of 12 to 48 months postoperatively (mean 26 mth. 30 cases (75% had mild to severe pain of non-infective origin, starting as early as 6 months postoperatively. This was irrespective of the make, size or position (varus/valgus of the prosthesis. Though the Aufranc and Sweet clinical scoring was satisfactory in 65% cases, radiological evidence of complications like sinking, protrusion, etc. were seen in majority of the cases. Calcar resorption was seen in 34 cases (85% as early as 4 months postoperatively. Results of THR and bipolar replacement done for transcervical fractures in recent literature show 85% pain-free cases at 5 years. We feel that Austin Moore Replacement should be reserved for patients more than 65 years of age and those who are less active or debilitated because of other factors, because of increased acetabular wear with time in the younger individual. This is corroborated by unsatisfactory results in patients less than 65 years of age (p < 0.05.

  19. Unfavourable results following reduction mammoplasty

    Directory of Open Access Journals (Sweden)

    Lakshmi Saleem

    2013-01-01

    Full Text Available Breast reduction is a common cosmetic surgical procedure. It aims not only at bringing down the size of the breast proportionate to the build of the individual, but also to overcome the discomfort caused by massive, ill-shaped and hanging breasts. The operative procedure has evolved from mere reduction of breast mass to enhanced aesthetic appeal with a minimum of scar load. The selection of technique needs to be individualised. Bilateral breast reduction is done most often. Haematoma, seroma, fat necrosis, skin loss, nipple loss and unsightly, painful scars can be the complications of any procedure on the breast. These may result from errors in judgement, wrong surgical plan and imprecise execution of the plan. Though a surfeit of studies are available on breast reduction, very few dwell upon its complications. The following article is a distillation of three decades of experience of the senior author (L.S. in reduction mammoplasty. An effort is made to understand the reasons for unfavourable results. To conclude, most complications can be overcome with proper selection of procedure for the given patient and with gentle tissue handling.

  20. TMX-U experimental results

    International Nuclear Information System (INIS)

    Simonen, T.C.; Allen, S.L.; Casper, T.A.

    1983-01-01

    This paper describes results from the Tandem Mirror Experiment-Upgrade (TMX-U). Mirror-confined electrons with 30 to 70 keV mean energy densities of 0.5 to 2.0 x 10 12 cm -3 and average betas of 3 to 5% are produced using electron-cyclotron resonant heating (ECRH). These results are consistent with an electron Fokker-Planck code. Improved ion-cyclotron microstability is observed using neutral beam injection at 47 0 to the magnetic axis, rather than at 90 0 as in the previous experiment, TMX. Strong end plugging has been produced using a combination of ECRH gyrotrons with sloshing-ion beam injection. In these low-density central cell experiments (3 x 10 11 cm -3 ) the axial losses (tau/sub parallel/ = 20 to 80 ms) are smaller than the nonambipolar radial losses (tau/sub perpendicular/ = 4 to 8 ms). Plugging has been achieved with a central cell density double that of the end plugs. Although no direct measurements are yet available to determine if a thermal barrier potential dip is generated, these experiments support many theoretical features of the thermal barrier concept

  1. Results from the NOMAD experiment

    CERN Document Server

    Popov, B A

    2000-01-01

    The NOMAD experiment has sought nu /sub mu / implies/implied by nu /sub tau / oscillations by looking for the emergence of tau /sup -/ in events from the CERN SPS neutrino beam. With some improvements in the techniques of analysis in relation to the results published previously and with the inclusion of data from the 1998 run, no evidence for the oscillations has been found, which results in an updated limit on the oscillation probability [P( nu /sub mu / to nu /sub tau /)<0.5* 10/sup -3/ at a 90% C.L.]. The corresponding limit on the oscillation mixing angle is given by sin/sup 2/2 theta /sub mu tau /<1.0*10/sup -3/ for large Delta m/sup 2/. By using a 1% contamination of nu /sub e/ in the neutrino beam, we can also rule out nu /sub e/ implies/implied by nu /sub tau / oscillations and constrain the probability of the relevant transition as P( nu /sub 3/ to nu /sub tau /)<3*10/sup -2/ at a 90% C.L. (sin/sup 2/2Q/sub e tau /<6*10/sup -2/ at large Delta m/sup 2/). (10 refs).

  2. Mechanical Valve Replacement: Early Results

    Directory of Open Access Journals (Sweden)

    Habib Cakir

    2012-02-01

    Full Text Available Aim: Valve diseases in developing countries like Turkey which often occur as a complication of rheumatic fever are a serious disease. Surgical treatment of valve diseases should be done before irreversible damage to the myocardium occurred. In this study, we aimed to present the early results of mechanical valve replacement operations. Method: A hundred patients with mechanical valve replacement surgery were retrospectively evaluated in Seyhan Application Center attached to our clinic between July 2007 and August 2011. Results: Fifty patients were male and 50 were women. The mean age of patients was 47.88 (18-78. Isolated aortic valve replacement (AVR was performed to 23 patients, isolated mitral valve replacement (MVR was 32, double valve replacement (AVR + MVR was 12, MVR + aortic valve valvuloplasty was 1, AVR + mitral kommissurotomi was 1, AVR + coronary artery bypass graft surgery (CABG was 17, MVR + CABG was 8, MVR + atrial septal defect closure was 2 and Bentall procedure.was 4 patients. In addition, ablation procedure was performed to 5 patients intraoperatively because of preoperative atrial fibrillation. Two patients (2 % died in early postoperative period. Conclusion: Mechanical prosthetic valves are used for surgical treatment of valve disease with low mortality and morbidity in a large group of patients like women that not to think to get pregnant, non advanced age group and patients have less risky for anticoagulation drug in our clinic. [Cukurova Med J 2012; 37(1.000: 49-54

  3. Treatment Results for Supraglottic Cancer

    International Nuclear Information System (INIS)

    Lee, Kyu Chan; Kim, Chul Yong; Choi, Myung Sun

    1994-01-01

    Purpose: In supraglottic cancer, radiation therapy is used to preserve the laryngeal function but combined surgery and radiation therapy is required in advanced stage. The authors present the results of radiation therapy alone and combined surgery plus postoperative radiation therapy for supraglottic cancer. Methods and Materials: A retrospective analysis was done for 43 patients with squamous cell carcinoma of the supraglottic larynx who were treated from February 1982 to December 1991, in the Department of Radiation Oncology, Korea University Hospital. Patient distribution according to the AJCC staging system was as follows; I, 3(7.0%); II, 7(16.3%); III, 17(39.5%); IV, 16(37.2%). Patients' age ranged from 30 to 72 years(median 62). Follow up durations were from 21 to 137 months(median 27). Seventeen patients(39.5%) were treated by radiation therapy alone with radiation doses of 6840-7380 cGy and 26 patients(60.5%) were treated with surgery plus postoperative irradiation with doses of 5820-6660 cGy. Results: Overall five-year survival rate for all stage was 51.8%, with 100% for Stage I and II, 47.3% for Stage III, and 29.2% for Stage IV. The difference of the survival rate by stage was statistically significant(p=0.0152). Five-year survival rates were 100% for locally confined tumor in the supraglottic larynx, 37.5% for transglottic extension, 26.7% for hypopharynx extension, and only two of 5 patients with both transglottic and hypopharynx extension were alive(p=0.0033). Five-year survival rates by neck node status were as follows: 55.0% for N0, 64.3% for N1, 50.0% for N2, and all 2 of N3 were died of disease. Overall survival rate for radiation therapy alone group was 42.8% and it was 56.7% for surgery plus postoperative radiation therapy group with no statistically significant difference(p=0.5215). In Stage I and II, all patients survived. In Stage III and IV, 5-year survival rate for radiation therapy alone group was 28.5% and 43.4% for surgery plus

  4. Radial head prosthesis: results overview.

    Science.gov (United States)

    Carità, E; Donadelli, A; Cugola, L; Perazzini, P

    2017-12-01

    Radial head replacement is frequently used in treatment of radial head fractures or sequela. Impossibility to restore a correct anatomy, acute elbow traumatic instability and failure of osteosynthesis hardware are the most common indications. The authors describe their case studies and results on the implantation of various radial head prostheses. Between June 2005 and June 2016, 28 radial head prostheses were implanted in the same number of patients with an average follow-up of 49 months (6-104). Indications for implantation were: Mason type III and IV radial head fractures and post-traumatic arthritis due to failure of previous treatments. Monopolar prostheses were used and were press-fit implanted via Kaplan's lateral access and Kocher's anconeus approach to the humeroradial joint. At the follow-up, assessments were made of the pain, according to the visual analogic scale, range of motion (ROM), stability and functionality according to the Mayo Elbow Performance Score, presence of osteolysis and mobilization during radiography tests, personal satisfaction of the patients, Disabilities of the Arm, Shoulder and Hand and Patient-Rated Wrist Evaluation outcomes measurements. At the follow-up, we recorded an average level of pain of 1.8 in patients under acute treatments for radial head fractures and a marked reduction in the remaining cases from 6.7 to 2.1. ROM was found on average to be 107° of flexion-extension and 159° of pronosupination. Personal satisfaction was good-excellent in 23 cases. There was no case of infection; removal of the implant was necessary in three cases due to mobilization of the stem and oversized implants. In six cases, bone resorption was seen at the level of the prosthetic collar and it was in all cases asymptomatic. The results of this study suggest that the use of prostheses, if well positioned, is a valid solution in the treatment of secondary arthritis and fractures of the radial head with poor prognosis, with good results in the

  5. Discrete compactons: some exact results

    International Nuclear Information System (INIS)

    Kevrekidis, P G; Konotop, V V; Bishop, A R; Takeno, S

    2002-01-01

    In this letter, we use the method of constructing exact solutions on lattices proposed by Kinnersley and described in Schmidt (1979 Phys. Rev. B 20 4397), to obtain exact compacton solutions in discrete models. We examine the linear stability of such solutions, both for the bright compacton and for the dark compacton cases. We focus on a 'quantization condition' that the width of the profile should satisfy. We also use this quantization condition to examine the possibility of compact coherent structures travelling in discrete settings. Our results are obtained for sinusoidal profiles and then generalized to elliptic functions of arbitrary modulus. The possibility of multi-compacton solutions is considered. (letter to the editor)

  6. Recent Dibosons Results from ATLAS

    CERN Document Server

    Kouskoura, V; The ATLAS collaboration

    2013-01-01

    Measurements on the production of electroweak boson pairs at the LHC provide an important test of the predictions of the electroweak sector of the Standard Model, and allow precise measurements of the Triple Gauge Couplings vertices probing for possible new phenomena involving gauge bosons. ATLAS has studied diboson production processes involving all combinations of W, Z and isolated photons, providing total and fiducial cross sections. The Wγ, Zγ, WW, WZ and ZZ processes were also used to provide new constraints on the triple-gauge couplings. We concentrate on the WZ and ZZ production measurements, both performed using leptonic decay channels since they are the cleanest signatures of these processes. The latest ATLAS results on dibosons are presented using data collected at centre-of-mass energies of 7 and 8 TeV.

  7. Cassini at Saturn Huygens results

    CERN Document Server

    Harland, David M

    2007-01-01

    "Cassini At Saturn - Huygens Results" will bring the story of the Cassini-Huygens mission and their joint exploration of the Saturnian system right up to date. Cassini is due to enter orbit around Saturn on the 1 July 2004 and the author will have 8 months of scientific data available for review, including the most spectacular images of Saturn, its rings and satellites ever obtained by a space mission. As the Cassini spacecraft approached its destination in spring 2004, the quality of the images already being returned by the spacecraft clearly demonstrate the spectacular nature of the close-range views that will be obtained. The book will contain a 16-page colour section, comprising a carefully chosen selection of the most stunning images to be released during the spacecraft's initial period of operation. The Huygens craft will be released by Cassini in December 2004 and is due to parachute through the clouds of Saturn's largest moon, Titan, in January 2005.

  8. Results from ISTC frame work

    Energy Technology Data Exchange (ETDEWEB)

    Fukahori, Tokio [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment

    1998-03-01

    Under International Science Research Center (ISTC) projects, JAERI Nuclear Data Center has been taking a role of collaborator and monitor for following items; (1) Measurement of the Fission Neutron Spectra of the Minor Actinides and Spontaneous Fission of Curium Isotopes (ISTC no. 183: V.I. Khlopin Radium Institute, KRI, St. Petersburg, Russia), (2) Measurement and Analysis of the Basic Nuclear Data for Minor Actinides (ISTC no. 304: Institute of Physics and Power Engineering, IPPE, Obninsk, Russia), and Evaluation of Actinide Nuclear Data (ISTC no. CIS-3: Radiation Physics and Chemistry Problems Institute, RPCPI, Minsk, Belarus). These are related to the Japanese OMEGA Project and expected to supply minor actinide (MA) nuclear data, since Russia has good quality MA samples, experimental technique and nuclear data evaluation experiences. In this report, out-line and some results of above three projects are reviewed. (author)

  9. First results on fast baking

    Energy Technology Data Exchange (ETDEWEB)

    Visentin, B. [CEA-Saclay, DSM/DAPNIA/SACM - 91191 Gif/Yvette Cedex (France)]. E-mail: bvisentin@cea.fr; Gasser, Y. [CEA-Saclay, DSM/DAPNIA/SACM - 91191 Gif/Yvette Cedex (France); Charrier, J.P. [CEA-Saclay, DSM/DAPNIA/SACM - 91191 Gif/Yvette Cedex (France)

    2006-07-15

    High gradient performances of bulk niobium cavities go through a low-temperature baking during one or two days, the temperature parameter is adjusted in a narrow tuning range around 110 or 120deg, C. With such treatment, the intrinsic quality factor Q{sub 0} is improved at high fields. Assuming the oxygen diffusion is involved in this phenomenon, we have developed the 'fast baking' (145deg, C/3h) as an alternative method. Similar results have been achieved with this method compared to standard baking. Consequently, for the first time, a link between oxygen diffusion and high field Q-slope has been demonstrated. Furthermore, this method open the way to a simpler and better baking procedure for the large-scale cavity production due to:*time reduction and *possibility to combine baking and drying during cavity preparation.

  10. HEAO A-2 extragalactic results

    Science.gov (United States)

    Boldt, E. A.

    1979-01-01

    The all-sky surveys made with the A-2 instrument aboard HEAO-1 involved spectroscopy over a broad enough band width, with sufficient resolution, to obtain the basic spectral characteristics for two extreme aspects of the extragalactic X-ray sky. The overall spectrum (above 3 KeV) is remarkably well decribed by a thermal model. At the other extreme, the detailed broad-band observations of individual sources are restricted to objects within the present epoch. The objects include several individual active galaxies studied in detail for the first time as well as clusters of galaxies. Relating these results to the vast spatially unresolved hard X-ray flux measured with this instruments as well as the softer X-rays (at less than 3 keV) spatially resolved to high redshifts with the Einstein Observatory remains a challenge.

  11. Latest results from KLOE-2

    Directory of Open Access Journals (Sweden)

    Bloise Caterina

    2014-01-01

    Full Text Available The KLOE experiment at the Frascati φ–factory recently obtained results on i CPT and Lorentz invariance tests from the study of quantum interference of the neutral kaon pairs; ii precision measurement of the branching fraction, BR(K+ → π+π−π+(γ = 0.05565 ± 0.00031stat ± 0.00025syst, and iii on dark photon searches with the analysis of the e+e− → µµγ final state. We have also studied the transition form factors of the φ meson to the pseudoscalars, π0 and η, that is presented in a separate contribution to this volume.

  12. Results from the AMANDA detector

    CERN Document Server

    Ackermann, M; Albrecht, H; Bai, X; Bartelt, M; Barwick, S W; Bay, R; Becka, T; Becker, J K; Becker, K H; Bernardini, E; Bertrand, D; Boersma, D J; Boser, S; Botner, O; Bouchta, A; Bouhali, O; Braun, J; Burgess, C; Burgess, T; Castermans, T; Chirkin, D; Collin, B; Conrad, J; Cooley, J; Cowen, D F; Davour, A; De Clercq, C; Pérez de los Heros, C; De Young, T R; Desiati, P; Ekstrom, P; Feser, T; Gaisser, T K; Ganugapati, R; Geenen, H; Gerhardt, L; Goldschmidt, A; Gross, A; Hallgren, A; Halzen, F; Hanson, K; Hardtke, R; Harenberg, T; Hauschildt, T; Helbing, K; Hellwig, M; Herquet, P; Hill, G C; Hodges, J; Hubert, D; Hughey, B; Hulth, P O; Hultqvist, K; Hundertmark, S; Jacobsen, J; Kampert, K H; Karle, A; Kelley, J; Kestel, M; Köpke, L; Kowalski, M; Krasberg, M; Kühn, K; Leich, H; Leuthold, M; Liubarsky, I; Madsen, J; Mandli, K; Marciniewski, P; Martino, J R; Matis, H S; McParland, C P; Messarius, T; Minaeva, Y; Miocinovic, P; Morse, R; Munich, K; Nahnhauer, R; Nam, J W; Neunhoffer, T; Niessen, P; Nygren, D R; Ogelman, H; Olbrechts, P; Pohl, A C; Porrata, R; Price, P B; Przybylski, G T; Rawlins, K; Resconi, E; Rhode, W; Ribordy, M; Richter, S; Sander, H G; Schinarakis, K; Schlenstedt, S; Schneider, D; Schwarz, R; Silvestri, A; Solarz, M; Spiczak, G M; Spiering, C; Stamatikos, M; Steele, D; Steffen, P; Stokstad, R G; Sulanke, K H; Taboada, I; Thollander, L; Tilav, S; Wagner, W; Walck, C; Walter, M; Wang, Y R; Wiebusch, C; Wischnewski, R; Wissing, H; Woschnagg, K; Yodh, G

    2004-01-01

    The Antarctic Muon And Neutrino Detector Array (AMANDA) is a high- energy neutrino telescope based at the geographic south pole. It is a lattice of photomultiplier tubes buried deep in the polar ice, which is used as interaction and detection medium. The primary goal of this detector is the observation of astronomical sources of high-energy neutrinos. This paper shows the latest results of the search for a diffuse flux of extraterrestrial nu /sub mu /s with energies between 10/sup 11/ eV and 10/sup 18/ eV, nu /sub mu /s emitted from point sources and nu /sub mu /s from dark matter annihilation in the Earth and the Sun.

  13. Recent results on Tore Supra

    International Nuclear Information System (INIS)

    Moreau, D.

    1995-01-01

    Recent results regarding heating, confinement, current drive and profile modifications, heat and particle exhaust are reported. Improved core confinement is obtained after pellet injection (PEP) or Lower Hybrid current drive (LHEP) and may be linked with small - or reversed - central magnetic shear. Conversely, by increasing the magnetic shear in the gradient region, both LHCD and fast wave electron heating (FWEH) have produced improved global confinement was carried by the bootstrap current. Fast wave current drive has been observed at the level of 80 kA in a 0.4 MA discharge. In the ergodic divertor configuration, stable radiative layers were obtained with neon injection. At least 80% of a total of 7 MW injected power were radiated without confinement degradation or impurity accumulation. Finally, the heat exhaust capability of the various actively cooled plasma facing components is briefly described. (author) 14 refs.; 13 figs

  14. Results from KASCADE-Grande

    Energy Technology Data Exchange (ETDEWEB)

    Bertaina, M., E-mail: bertaina@to.infn.it [Dipartimento di Fisica Generale dell' Universita, Torino (Italy); Apel, W.D. [Institut fuer Kernphysik, KIT - Karlsruher Institut fuer Technologie (Germany); Arteaga-Velazquez, J.C. [Universidad Michoacana, Instituto de Fisica y Matematicas, Morelia (Mexico); Bekk, K. [Institut fuer Kernphysik, KIT - Karlsruher Institut fuer Technologie (Germany); Bluemer, J. [Institut fuer Kernphysik, KIT - Karlsruher Institut fuer Technologie (Germany); Institut fuer Experimentelle Kernphysik, KIT - Karlsruher Institut fuer Technologie (Germany); Bozdog, H. [Institut fuer Kernphysik, KIT - Karlsruher Institut fuer Technologie (Germany); Brancus, I.M. [National Institute of Physics and Nuclear Engineering, Bucharest (Romania); Buchholz, P. [Fachbereich Physik, Universitaet Siegen (Germany); Cantoni, E. [Dipartimento di Fisica Generale dell' Universita, Torino (Italy); Istituto di Fisica dello Spazio Interplanetario, INAF Torino (Italy); Chiavassa, A. [Dipartimento di Fisica Generale dell' Universita, Torino (Italy); Cossavella, F. [Institut fuer Experimentelle Kernphysik, KIT - Karlsruher Institut fuer Technologie (Germany); and others

    2012-11-11

    The KASCADE-Grande experiment, located at Karlsruhe Institute of Technology (Germany) is a multi-component extensive air-shower experiment devoted to the study of cosmic rays and their interactions at primary energies 10{sup 14}-10{sup 18} eV. Main goals of the experiment are the measurement of the all-particle energy spectrum and mass composition in the 10{sup 16}-10{sup 18} eV range by sampling charged (N{sub ch}) and muon (N{sub {mu}}) components of the air shower. The method to derive the energy spectrum and its uncertainties, as well as the implications of the obtained result, is discussed. An overview of the analyses performed by KASCADE-Grande to derive the mass composition of the measured high-energy comic rays is presented as well.

  15. CMS results on exclusive production

    CERN Document Server

    Khakzad, Mohsen

    2016-01-01

    A search for exclusive or quasi-exclusive $\\gamma\\gamma \\rightarrow W^{+}W^{-}$ production, ${\\rm pp} \\rightarrow {\\rm p}^{(*)} W^{+}W^{-} {\\rm p}^{(*)} \\rightarrow {\\rm p}^{(*)} \\mu^{\\pm} {\\rm e}^{\\mp} {\\rm p}^{(*)}$, at $\\sqrt{s}$ = 8 TeV (7 TeV) are reported using data corresponding to an integrated luminosity of 19.7 $\\rm {fb}^{-1}$ (5.5$\\rm {fb}^{-1}$), respectively. In this study, we look for any deviations that there might be from the Standard Model, and the results are used to set limits on the Anomalous Quartic Gauge Couplings. We also report a measurement of the exclusive production of pairs of charged pions in proton-proton collisions. The differential cross sections for $\\pi^{+}\\pi^{-}$ pairs as a function of the pion pair invariant mass is measured and compared to several phenomenological predictions.

  16. Recent ATLAS Heavy Ion results

    CERN Multimedia

    CERN. Geneva

    2012-01-01

    Lead nucleus collisions in the LHC recreate the state of matter which existed when the universe was a few microseconds old. This super-hot matter, composed of quark and gluons, emits thousands of particles as it expands, cools and converts back into hadrons. The ATLAS detector provides an excellent opportunity to perform detailed studies of this novel state of matter, measuring its bulk properties and its response to penetrating probes. Recent studies of particle correlations and fluctuations shed light on the initial geometry and its evolution into the final state. Studies of jet suppression and fragmentation show how the energetic partons interact with the medium. High precision measurements of boson production and first results on boson-jet correlations are important steps towards quantitative understanding of the parton energy loss mechanism.

  17. Some results in Diophantine approximation

    DEFF Research Database (Denmark)

    Pedersen, Steffen Højris

    This thesis consists of three papers in Diophantine approximation, a subbranch of number theory. Preceding these papers is an introduction to various aspects of Diophantine approximation and formal Laurent series over Fq and a summary of each of the three papers. The introduction introduces...... the basic concepts on which the papers build. Among other it introduces metric Diophantine approximation, Mahler’s approach on algebraic approximation, the Hausdorff measure, and properties of the formal Laurent series over Fq. The introduction ends with a discussion on Mahler’s problem when considered...... in the formal Laurent series over F3. The first paper is on intrinsic Diophantine approximation in the Cantor set in the formal Laurent series over F3. The summary contains a short motivation, the results of the paper and sketches of the proofs, mainly focusing on the ideas involved. The details of the proofs...

  18. Results from KASCADE–Grande

    International Nuclear Information System (INIS)

    Bertaina, M.; Apel, W.D.; Arteaga-Velázquez, J.C.; Bekk, K.; Blümer, J.; Bozdog, H.; Brancus, I.M.; Buchholz, P.; Cantoni, E.; Chiavassa, A.; Cossavella, F.

    2012-01-01

    The KASCADE–Grande experiment, located at Karlsruhe Institute of Technology (Germany) is a multi-component extensive air-shower experiment devoted to the study of cosmic rays and their interactions at primary energies 10 14 –10 18 eV. Main goals of the experiment are the measurement of the all-particle energy spectrum and mass composition in the 10 16 –10 18 eV range by sampling charged (N ch ) and muon (N μ ) components of the air shower. The method to derive the energy spectrum and its uncertainties, as well as the implications of the obtained result, is discussed. An overview of the analyses performed by KASCADE–Grande to derive the mass composition of the measured high-energy comic rays is presented as well.

  19. MITG test procedure and results

    International Nuclear Information System (INIS)

    Eck, M.E.; Mukunda, M.

    1983-01-01

    Elements and modules for Radioisotope Thermoelectric Generator have been performance tested since the inception of the RTG program. These test articles seldom resembled flight hardware and often lacked adequate diagnostic instrumentation. Because of this, performance problems were not identified in the early stage of program development. The lack of test data in an unexpected area often hampered the development of a problem solution. A procedure for conducting the MITG Test was developed in an effort to obtain data in a systematic, unambiguous manner. This procedure required the development of extensive data acquisition software and test automation. The development of a facility to implement the test procedure, the facility hardware and software requirements, and the results of the MITG testing are the subject of this paper

  20. Energy 21. Preconditions and results

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    In 1988 the Danish government adopted an action plan for the environment and sustainable development. In 1990, the energy aspects of this plan were embodied in Energy 2000 and, in 1993, in Energy 2000 follow-up. The objective is a 20% reduction of CO{sub 2} emissions by the year 2005, compared with the level in 1988. Various measures are therefore being taken as time passes to help achieve this objective. As part of the monitoring of developments in the energy sector, it is necessary to take stock from time to time and to assess the direction in which the sector is moving. The government has therefore drawn up a new energy action plan, Energy 21, both to ensure that the overall objectives in the current plan are actively followed up on and to look ahead at the possibilities for action after the year 2005. The Danish Energy Agency has previously carried out a number of analyses of the technological and behavioural possibilities for reducing energy consumption in the short and the long term, for improving the efficiency of energy supply installations, and for using new and sustainable energy technologies. The results of this work are described in the report Denmark`s Energy Futures. The calculations in the report itself and its appendices. The more detailed assumptions and a description of the methods of analysis etc. are given in Basis for Analysis of Denmark`s Energy Futures. This report contains the assumptions, a description of methods and some of the results of the work on Energy 21. (au)

  1. Uncertainty of dustfall monitoring results

    Directory of Open Access Journals (Sweden)

    Martin A. van Nierop

    2017-06-01

    Full Text Available Fugitive dust has the ability to cause a nuisance and pollute the ambient environment, particularly from human activities including construction and industrial sites and mining operations. As such, dustfall monitoring has occurred for many decades in South Africa; little has been published on the repeatability, uncertainty, accuracy and precision of dustfall monitoring. Repeatability assesses the consistency associated with the results of a particular measurement under the same conditions; the consistency of the laboratory is assessed to determine the uncertainty associated with dustfall monitoring conducted by the laboratory. The aim of this study was to improve the understanding of the uncertainty in dustfall monitoring; thereby improving the confidence in dustfall monitoring. Uncertainty of dustfall monitoring was assessed through a 12-month study of 12 sites that were located on the boundary of the study area. Each site contained a directional dustfall sampler, which was modified by removing the rotating lid, with four buckets (A, B, C and D installed. Having four buckets on one stand allows for each bucket to be exposed to the same conditions, for the same period of time; therefore, should have equal amounts of dust deposited in these buckets. The difference in the weight (mg of the dust recorded from each bucket at each respective site was determined using the American Society for Testing and Materials method D1739 (ASTM D1739. The variability of the dust would provide the confidence level of dustfall monitoring when reporting to clients.

  2. [Reprodcutive results of radical trachelectomy].

    Science.gov (United States)

    Martínez-Chapa, Arnulfo; Alonso-Reyes, Nelly; Luna-Macías, Miguel

    2015-12-01

    Historically, cervical cancer in early stages has been treated with radical hysterectomy and radiotherapy with no option in keeping the uterine-ovarian function. Since two decades ago, evidence shows these cases are candidates for radical trachelectomy, a procedure capable of preserving the fertility without affecting the oncological outcome. To analyze reproductive results among patients treated with radical trachelectomy, in a reference center from the northeast of Mexico. Between March 1999 and December 2013, 27 cases with cervical cancer in early stages were treated with vaginal or abdominal radical trachelectomy in the ISSSTE Regional Hospital in Monterrey, NL (Mexico). We obtained the gynecological, medical and surgical clinical history. Plan of analysis consisted of descriptive statistics. Age range was 27-39 years. Main complications were cervical stenosis (n=1) and erosion of cerclaje (n=2). Eighteen patients tried to get pregnant, 8 of them got a spontaneous pregnancy; 1 more patient required assisted reproduction technics and did not succeed. All pregnancies were delivered by cesarean section and were preterm births; 3 underwent premature rupture of membranes. Two pregnancies ended in abortion, one at 10 weeks with severe hemorrhage that needed hysterectomy; the second one, at 1 7 weeks, received a fine uterine curettage. Only 6 cases (33%) got a live birth. Only one third of the attempted pregnancies got a live birth. Assisted reproduction technics play an important role and should be offer to all cases. Cerclaje is an important factor to carry a pregnancy up to the third trimester.

  3. Results of the 2009 elections

    CERN Multimedia

    Association du personnel

    The elections to renew the Staff Council for the 2010-2011 period are now behind us and we are very pleased to have had at least as many candidates as posts in five of the six electoral colleges. Furthermore, the average rate of participation of 56.8% in these elections is a very good result compared to previous years. We thank the candidates who have committed themselves to actively defending the interests of the staff, and all our members have shown, by voting, their full support of the candidates in their college and Department. This newly-elected Staff Council (see its composition on the following page) will therefore be truly representative of all the sectors and professions of the Organization, which will be a major asset when the Staff Association representatives begin discussions with the Management and Member States in 2010 on the key issues of the five-yearly review and the measures to be taken to absorb the deficit of our Pension Fund. Armed with this vote of confidence, we know that we can count o...

  4. CMS results in Electroweak Physics

    CERN Multimedia

    CERN. Geneva

    2011-01-01

    We present the results of electroweak studies performed using data collected in 2010 at a center-of-mass energy of 7 TeV by the CMS experiment at the LHC. Besides their intrinsic interest as unique samples to calibrate and understand the CMS detector response to leptons, jets and missing energy, events containing W and Z bosons appear as dominant components in many Higgs seaches and in most of the searches beyond the Standard Model, either as signal or as background. In addition, the excellent level of theoretical and experimental understanding of these processes allows electroweak tests at the LHC at an unprecendented level of precision. CMS uses a wide range of final states to measure cross sections, asymmetries, polarizations and differential distributions in general. The current integrated luminosity is already sufficient to perform not just inclusive measurements using W and Z decays into muons and electrons, but also precise studies of associated jet production and final states containing taus, as well...

  5. World strength map: preliminary results

    Science.gov (United States)

    Tesauro, Magdala; Kaban, Mikhail K.; Cloetingh, Sierd A. P. L.; Mooney, Walter

    2010-05-01

    Rheology and strength of the Earth's lithosphere have been debated since the beginning of the last century, when the concept of a strong lithosphere overlying viscous asthenosphere was introduced. The issue of strength of the lithospheric plates and their spatial and temporal variations is important for many geodynamic applications. For rocks with given mineralogical composition and microstructure, temperature is one of the most important parameters controlling rheology. We present the first world strength map obtained from global thermal and crustal models. Temperature estimates for the deeper horizons of the lithosphere, where the heat transport is mostly conductive, requires a precise knowledge of many crustal parameters (mainly thermal conductivity and heat production), which are extremely uncertain. Therefore, we use a combination of indirect approaches, such as seismic tomography and geothermal analysis. Furthermore, we implement a global crustal model on the base of previous compilations. Lithology of the upper and lower crust was classified based on tectonic maps of the World in agreement with the previous study of Tesauro et al. (2009). The results show a good correspondence between strength values and geological features. We observe some general tendency for old cratons and areas affected by the Tertiary volcanism, characterized by high and low strength values, respectively. At the same time, relevant differences in the strength distribution between similar structures are found.

  6. Overview of the FTU results

    International Nuclear Information System (INIS)

    Romanelli, F.

    2001-01-01

    An overview of the FTU results during the period 1998-2000 is presented. FTU has operated up to the nominal parameters (B=8T, I=1.6MA) with good reliability. Using the high-speed, multiple pellet injection system in 8T/1.25MA discharges a phase lasting a few energy confinement time has been achieved with improved confinement properties with peaked density profiles (n=4x10 20 m -3 ), T e ∼T i and Z eff ∼1.3. Up to 14 keV of electron temperature have been obtained at high density using electron cyclotron resonance heating (ECRH) on the current ramp. The transport analysis shows a very low electron heat transport in the region with flat/hollow safety factor profile. Synergy studies have been performed with simultaneous injection of lower hybrid and electron cyclotron waves in 7.2T discharges, well above the ECRH resonance. Clear evidence has been obtained of electron cyclotron wave absorption by the lower hybrid produced electron tails. Stabilisation of m=2 tearing modes has been obtained using ECRH, with subsequent improvement of the energy confinement. Ion Bernstein wave injection in high magnetic field (B=8T) plasmas has shown the reduction of the electron thermal conductivity in the region inside the absorption radius possibly due to the formation of an internal transport barrier. (author)

  7. LSND results and their implications

    Energy Technology Data Exchange (ETDEWEB)

    Caldwell, D.O. [California Univ., Santa Barbara, CA (United States). Dept. of Physics

    1996-11-01

    The combined 1993, 1994, and 1995 data from the LSND experiment shows a statistically compelling excess of events of the type expected for {nu}{sub {mu}} {yields}{nu}{sub e} neutrino oscillations. An electron between 36 and 60 MeV is identified by Cherenkov and scintillation light from {nu}{sub e}p{yields}e{sup +}n, and if a {gamma} is tightly constrained to be correlated with it from np{yields}d{gamma} (2.2 MeV), then 22 such events are observed, but only 4.6{+-}0.6 are expected from background. The probability that this is a fluctuation is <10{sup -7}. If subsequent analysis shows a similar effect from the independent channel {nu}{sub {mu}}{yields}{nu}{sub e}, then this would imply a neutrino mass difference which would contribute significantly to the dark matter of the universe. Explaining also the solar and atmospheric neutrino deficits results in a neutrino mass pattern which gives a cold + hot dark matter which fits the structure of the universe on all scales and requires a critical density universe and an universe age compatible with that of the oldest stars. This mass pattern involves a sterile neutrino, evidence for which may come from the need for it in producing heavy elements by supernovae and for blowing off the supernova mantle. (author) 3 figs., 18 refs.

  8. EFTF cobalt test assembly results

    International Nuclear Information System (INIS)

    Rawlins, J.A.; Wootan, D.W.; Carter, L.L.; Brager, H.R.; Schenter, R.E.

    1988-01-01

    A cobalt test assembly containing yttrium hydride pins for neutron moderation was irradiated in the Fast Flux Test Facility during Cycle 9A for 137.7 equivalent full power days at a power level fo 291 MW. The 36 test pins consisted of a batch of 32 pins containing cobalt metal to produce Co-60, and a set of 4 pins with europium oxide to produce Gd-153, a radioisotope used in detection of the bone disease Osteoporosis. Post-irradiation examination of the cobalt pins determined the Co-60 produced with an accuracy of about 5 %. The measured Co-60 spatially distributed concentrations were within 20 % of the calculated concentrations. The assembly average Co-60 measured activity was 4 % less than the calculated value. The europium oxide pins were gamma scanned for the europium isotopes Eu-152 and Eu-154 to an absolute accuracy of about 10 %. The measured europium radioisotpe anc Gd-153 concentrations were within 20 % of calculated values. In conclusion, the hydride assembly performed well and is an excellent vehicle for many Fast Flux Test Facility isotope production applications. The results also demonstrate that the calculational methods developed by the Westinghouse Hanford Company are very accurate. (author)

  9. Excellent results for CERN runners

    CERN Multimedia

    Hervé Cornet, CERN Running club

    2015-01-01

    As in previous years, thirty or so runners from CERN took part in the Tour du Canton de Genève (more information here, in French only).   The men’s team that won the corporate challenge prize in the Tour du Canton de Genève: (standing, left to right) Patrick Villeton, Phil Hebda, Mika Vesterinen, Steffen Doebert; (sitting, left to right) Guillaume Michet and Camille Ruiz-Llamas. The Laboratory was represented in the corporate challenge by five teams, one of which came first in the men’s category. CERN’s other teams also put in good performances, with one finishing fourth in the men's category and another seventh in the mixed category. Runners from CERN did well in the individual classifications too. All the results can be found here. The Maxi Race team: (left to right) Sebastien Ponce, Alain Cauphy, Klaus Hanke and Christophe Biot. Elsewhere, four CERN runners competed in the finals of the Annecy Maxi Race (site in French only...

  10. Evaluating the RELM Test Results

    Directory of Open Access Journals (Sweden)

    Michael K. Sachs

    2012-01-01

    Full Text Available We consider implications of the Regional Earthquake Likelihood Models (RELM test results with regard to earthquake forecasting. Prospective forecasts were solicited for M≥4.95 earthquakes in California during the period 2006–2010. During this period 31 earthquakes occurred in the test region with M≥4.95. We consider five forecasts that were submitted for the test. We compare the forecasts utilizing forecast verification methodology developed in the atmospheric sciences, specifically for tornadoes. We utilize a “skill score” based on the forecast scores λfi of occurrence of the test earthquakes. A perfect forecast would have λfi=1, and a random (no skill forecast would have λfi=2.86×10-3. The best forecasts (largest value of λfi for the 31 earthquakes had values of λfi=1.24×10-1 to λfi=5.49×10-3. The best mean forecast for all earthquakes was λ̅f=2.84×10-2. The best forecasts are about an order of magnitude better than random forecasts. We discuss the earthquakes, the forecasts, and alternative methods of evaluation of the performance of RELM forecasts. We also discuss the relative merits of alarm-based versus probability-based forecasts.

  11. Double Chooz: Results and Perspectives

    Energy Technology Data Exchange (ETDEWEB)

    Franke, A.J., E-mail: ajfranke@nevis.columbia.edu [Columbia University, New York, New York 10027 (United States)

    2013-04-15

    The Double Chooz experiment has been observing ν{sup ¯}{sub e} from two reactor cores at the Chooz nuclear power station in Ardennes, France, with a single 10.3 m{sup 3} fiducial volume Gd-doped liquid scintillator detector at a flux-weighted average baseline of ∼1050 m. This article reviews results achieved with a detector live time of 227.93 days and exposure of 33.71 GW-ton-years. A total of 8,249 candidate ν{sup ¯}{sub e} events have been observed, compared to an expected 8,937 events in the null-oscillation case: this deficit is interpreted as evidence for ν{sup ¯}{sub e} disappearance. A fit to the observed neutrino rate and spectral shape gives a best-fit value of sin{sup 2}(2θ{sub 13})=0.109±0.030(stat.)±0.025(syst.) at a mass-squared splitting of Δm{sub 31}{sup 2}=2.32×10{sup −3} eV{sup 2}. The null-oscillation hypothesis is excluded by the data at 99.8% CL (2.9σ). The Double Chooz Near Detector is under construction, and analysis efforts to measure neutrino directionality, test Lorentz violation, and measure backgrounds in situ are underway.

  12. Double Chooz: Results and Perspectives

    Science.gov (United States)

    Franke, A. J.

    2013-04-01

    The Double Chooz experiment has been observing ν from two reactor cores at the Chooz nuclear power station in Ardennes, France, with a single 10.3 m fiducial volume Gd-doped liquid scintillator detector at a flux-weighted average baseline of ˜1050 m. This article reviews results achieved with a detector live time of 227.93 days and exposure of 33.71 GW-ton-years. A total of 8,249 candidate ν events have been observed, compared to an expected 8,937 events in the null-oscillation case: this deficit is interpreted as evidence for ν disappearance. A fit to the observed neutrino rate and spectral shape gives a best-fit value of sin2(2θ13)=0.109±0.030 (stat.)±0.025 (syst.) at a mass-squared splitting of Δm312=2.32×10-3 eV. The null-oscillation hypothesis is excluded by the data at 99.8% CL (2.9σ). The Double Chooz Near Detector is under construction, and analysis efforts to measure neutrino directionality, test Lorentz violation, and measure backgrounds in situ are underway.

  13. Recent results in hydrogen research

    International Nuclear Information System (INIS)

    Berman, M.; Sherman, M.P.; Wong, C.C.

    1987-01-01

    Progress has been made in the NRC-supported hydrogen research program in three areas: (1) a comparison of the HECTR and MAAP codes; (2) the completion of a series of experiments in the FLAME facility on flame acceleration and the transition from deflagration to detonation; and (3) a qualitative assessment of the potential for local detonations in a reactor containment. There are significant differences between the combustion models in HECTR and MAAP. These modelling differences can result in different predictions of containment pressure and temperature. Recent FLAME experiments have shown that spontaneous transition from deflagration to detonation can take place in hydrogen mixtures that are relatively insensitive. The presence of obstacles and the degree of confinement also play important roles in the likelihood of this transition. Information obtained during these experiments has been combined with other data and subjective judgments to develop a qualitative methodology for estimating the probability of local detonations. This methodology has been applied to the Bellefonte containment for some accident scenarios

  14. Experimental results on evaporation waves

    Science.gov (United States)

    Grana Otero, Jose; Parra Fabian, Ignacio

    2010-11-01

    A liquid contained in a vertical glass tube is suddenly depressurized from a high initial pressure down to one for which the stable state is vapour, so vaporization sets off at the free surface. For large enough evaporation rates, the planar vapour-liquid interface is Darrieus-Landau unstable [1], leading to the interface surface rippling close to the instability threshold. Further increasing the initial to final pressure ratio brings about evaporation waves [2,3], in which a highly corrugated front propagates downwards into the liquid. A new experimental method is presented as well as some experimental results obtained by tracking the evolution of the front with a high speed camera. In addition, a number of new phenomena related to the dynamics of bubbles growth at the walls has been uncovered. In particular, a new mode of propagation of the evaporation front is found. In this mode the front originates from below the interface, so the propagation is upwards against gravity with a curved but smooth front.[4pt] [1] F. J. Higuera, Phys. Fluids, V. 30, 679 (1987).[0pt] [2] J.E.Shepherd and B.Sturtevant, J.Fluid Mech., V.121,379 (1982).[0pt] [3] P.Reinke and G.Yadigaroglu, Int.J.Multiph. Flow, V.27,1487 (2001).

  15. Stapedectomy in tympanosclerosis, hearing results

    International Nuclear Information System (INIS)

    Al-Qahtani, M.; Hagr, A.

    2008-01-01

    The aim of present study was to evaluate the results of using stapedectomy to treat tympanosclerosis fixation of footplate. It is a retrospective review of tympanosclerosis of the oval window with stapes fixation, after undergoing surgery. Eight patients underwent stapedectomy for tympanosclerotic stapes. Postoperative post-op air-bone gap ABG closure to within 10 dB was achieved in 25% of the cases. An ABG of less than 20 db was obtained in 87.5% of the cases. The mean preoperative pre-op ABGs were 31.09 dB. Significant post-op improvement of air conduction thresholds more than, or equal to 20dB was found in 62.5% of cases. No significant sensorineural hearing loss was seen in this series with a mean pre-op bone-conduction threshold BC of 23.43 dB and a mean post-op BC threshold of 16.25 dB. The mean follow-up period was 6.5 months. (author)

  16. Cyclonic valve test: preliminary results

    Energy Technology Data Exchange (ETDEWEB)

    Monteiro, Andre Sampaio; Moraes, Carlos Alberto C.; Marins, Luiz Philipe M.; Soares, Fabricio; Oliveira, Dennis; Lima, Fabio Soares de; Airao, Vinicius [Petroleo Brasileiro S.A. (PETROBRAS), Rio de Janeiro, RJ (Brazil); Ton, Tijmen [Twister BV, Rijswijk (Netherlands)

    2012-07-01

    For many years, the petroleum industry has been developing a valve that input less shear to the flow for a given required pressure drop and this can be done using the cyclonic concept. This paper presents a comparison between the performances of a cyclonic valve (low shear) and a conventional globe valve. The aim of this work is to show the advantages of using a cyclonic low shear valve instead of the commonly used in the primary separation process by PETROBRAS. Tests were performed at PETROBRAS Experimental Center (NUEX) in Aracaju/SE varying some parameters: water cut; pressure loss (from 4 kgf/cm2 to 10 kgf/cm2); flow rates (30 m3/h and 45 m3/h). Results indicates a better performance of the cyclonic valve, if compared with a conventional one, and also that the difference of the performance, is a function of several parameters (emulsion stability, water content free, and oil properties). The cyclonic valve tested can be applied as a choke valve, as a valve between separation stages (for pressure drop), or for controlling the level of vessels. We must emphasize the importance to avoid the high shear imposed by conventional valves, because once the emulsion is created, it becomes more difficult to break it. New tests are being planned to occur in 2012, but PETROBRAS is also analyzing real cases where the applications could increase the primary process efficiency. In the same way, the future installations are also being designed considering the cyclonic valve usage. (author)

  17. LSND results and their implications

    International Nuclear Information System (INIS)

    Caldwell, D.O.

    1996-01-01

    The combined 1993, 1994, and 1995 data from the LSND experiment shows a statistically compelling excess of events of the type expected for ν μ →ν e neutrino oscillations. An electron between 36 and 60 MeV is identified by Cherenkov and scintillation light from ν e p→e + n, and if a γ is tightly constrained to be correlated with it from np→dγ (2.2 MeV), then 22 such events are observed, but only 4.6±0.6 are expected from background. The probability that this is a fluctuation is -7 . If subsequent analysis shows a similar effect from the independent channel ν μ →ν e , then this would imply a neutrino mass difference which would contribute significantly to the dark matter of the universe. Explaining also the solar and atmospheric neutrino deficits results in a neutrino mass pattern which gives a cold + hot dark matter which fits the structure of the universe on all scales and requires a critical density universe and an universe age compatible with that of the oldest stars. This mass pattern involves a sterile neutrino, evidence for which may come from the need for it in producing heavy elements by supernovae and for blowing off the supernova mantle. (author) 3 figs., 18 refs

  18. Integration process and logistics results

    International Nuclear Information System (INIS)

    2004-01-01

    The Procurement and Logistics functions have gone through a process of integration since the beginning of integrated management of Asco and Vandellos II up to the present. These are functions that are likely to be designed for delivering a single product to the rest of the organization, defined from a high level of expectations, and that admit simplifications and materialization of synergy's as they are approached from an integrated perspective. The analyzed functions are as follows: Service and Material Purchasing, Warehouse and Material Management, and Documentation and General Services Management. In all case, to accomplish the integration, objectives, procedures and information systems were unified. As for the organization, a decision was made in each case on whether or not to out source. The decisive corporate strategy to integrate, resulting in actions such as moving corporate headquarters to Vandellos II, corporate consolidation, regulation of employment and implementation of the ENDESA Group Economic Information System (SIE) , has shaped this process, which at present can be considered as practically complete. (Author)

  19. Overview of ASDEX Upgrade results

    International Nuclear Information System (INIS)

    Zohm, H.; Angioni, C.; Arslanbekov, R.

    2003-01-01

    Recent results from ASDEX Upgrade are presented. An improved understanding of energy and particle transport emerges in terms of a 'critical gradient' model for the temperature gradients. Coupling this to particle diffusion explains most of the observed behaviour of the density profiles, in particular the finding that strong central heating reduces the tendency for density profile peaking. Internal transport barriers with T e and T i in excess of 20 keV (but not simultaneously) have been achieved. By shaping the plasma, a regime with small type II ELMs has been established. Here, the maximum power deposited on the target plates was greatly reduced at constant average power. Also, an increase of the ELM frequency by injection of shallow pellets was demonstrated. ELM free operation is possible in the QH-mode regime previously found in DIII-D which has also been established on ASDEX Upgrade. Regarding stability, a regime with benign NTMs was found. During ECCD stabilisation of NTMs, β N could be increased well above the usual onset level without a reappearance of the NTM. ECRH and ECCD have also been used to control the sawtooth repetition frequency at a moderate fraction of the total heating power. The inner wall of the ASDEX Upgrade vessel has increasingly been covered with tungsten without detrimental effects on plasma performance. Regarding scenario integration, a scenario with a large fraction of non inductively driven current (≥ 50%), but without internal transport barrier has been established. It combines improved confinement (τ E =τ ITER98 ∼ 1:2) and stability (β N ≤ 3:5) at high Greenwald fraction (n e =n GW ∼ 0:85) in steady state and with type II ELMy edge. (author)

  20. Corral Monitoring System assessment results

    Energy Technology Data Exchange (ETDEWEB)

    Filby, E.E.; Haskel, K.J.

    1998-03-01

    This report describes the results of a functional and operational assessment of the Corral Monitoring Systems (CMS), which was designed to detect and document accountable items entering or leaving a monitored site. Its development was motivated by the possibility that multiple sites in the nuclear weapons states of the former Soviet Union might be opened to such monitoring under the provisions of the Strategic Arms Reduction Treaty. The assessment was performed at three levels. One level evaluated how well the planned approach addressed the target application, and which involved tracking sensitive items moving into and around a site being monitored as part of an international treaty or other agreement. The second level examined the overall design and development approach, while the third focused on individual subsystems within the total package. Unfortunately, the system was delivered as disassembled parts and pieces, with very poor documentation. Thus, the assessment was based on fragmentary operating data coupled with an analysis of what documents were provided with the system. The system design seemed to be a reasonable match to the requirements of the target application; however, important questions about site manning and top level administrative control were left unanswered. Four weaknesses in the overall design and development approach were detected: (1) poor configuration control and management, (2) inadequate adherence to a well defined architectural standard, (3) no apparent provision for improving top level error tolerance, and (4) weaknesses in the object oriented programming approach. The individual subsystems were found to offer few features or capabilities that were new or unique, even at the conceptual level. The CMS might possibly have offered a unique combination of features, but this level of integration was never realized, and it had no unique capabilities that could be readily extracted for use in another system.

  1. Recent results in visual servoing

    Science.gov (United States)

    Chaumette, François

    2008-06-01

    Visual servoing techniques consist in using the data provided by a vision sensor in order to control the motions of a dynamic system. Such systems are usually robot arms, mobile robots, aerial robots,… but can also be virtual robots for applications in computer animation, or even a virtual camera for applications in computer vision and augmented reality. A large variety of positioning tasks, or mobile target tracking, can be implemented by controlling from one to all the degrees of freedom of the system. Whatever the sensor configuration, which can vary from one on-board camera on the robot end-effector to several free-standing cameras, a set of visual features has to be selected at best from the image measurements available, allowing to control the degrees of freedom desired. A control law has also to be designed so that these visual features reach a desired value, defining a correct realization of the task. With a vision sensor providing 2D measurements, potential visual features are numerous, since as well 2D data (coordinates of feature points in the image, moments, …) as 3D data provided by a localization algorithm exploiting the extracted 2D measurements can be considered. It is also possible to combine 2D and 3D visual features to take the advantages of each approach while avoiding their respective drawbacks. From the selected visual features, the behavior of the system will have particular properties as for stability, robustness with respect to noise or to calibration errors, robot 3D trajectory, etc. The talk will present the main basic aspects of visual servoing, as well as technical advances obtained recently in the field inside the Lagadic group at INRIA/INRISA Rennes. Several application results will be also described.

  2. Mobile evaporator corrosion test results

    International Nuclear Information System (INIS)

    Rozeveld, A.; Chamberlain, D.B.

    1997-05-01

    Laboratory corrosion tests were conducted on eight candidates to select a durable and cost-effective alloy for use in mobile evaporators to process radioactive waste solutions. Based on an extensive literature survey of corrosion data, three stainless steel alloys (304L, 316L, AL-6XN), four nickel-based alloys (825, 625, 690, G-30), and titanium were selected for testing. The corrosion tests included vapor phase, liquid junction (interface), liquid immersion, and crevice corrosion tests on plain and welded samples of candidate materials. Tests were conducted at 80 degrees C for 45 days in two different test solutions: a nitric acid solution. to simulate evaporator conditions during the processing of the cesium ion-exchange eluant and a highly alkaline sodium hydroxide solution to simulate the composition of Tank 241-AW-101 during evaporation. All of the alloys exhibited excellent corrosion resistance in the alkaline test solution. Corrosion rates were very low and localized corrosion was not observed. Results from the nitric acid tests showed that only 316L stainless steel did not meet our performance criteria. The 316L welded interface and crevice specimens had rates of 22.2 mpy and 21.8 mpy, respectively, which exceeds the maximum corrosion rate of 20 mpy. The other welded samples had about the same corrosion resistance as the plain samples. None of the welded samples showed preferential weld or heat-affected zone (HAZ) attack. Vapor corrosion was negligible for all alloys. All of the alloys except 316L exhibited either open-quotes satisfactoryclose quotes (2-20 mpy) or open-quotes excellentclose quotes (<2 mpy) corrosion resistance as defined by National Association of Corrosion Engineers. However, many of the alloys experienced intergranular corrosion in the nitric acid test solution, which could indicate a susceptibility to stress corrosion cracking (SCC) in this environment

  3. Overview of the FTU results

    International Nuclear Information System (INIS)

    Angelini, B.; Apicella, M.L.; Romanelli, F.

    2003-01-01

    An overview of the FTU results during the period 2000-2002 is presented. Long duration Internal Transport Barriers have been obtained on FTU with combined injection of Lower Hybrid and Electron Cyclotron waves in 5T/0.5MA discharges. The ITB phase lasts about ten energy confinement times and is characterised by an energy confinement time up to 1.6 times the ITER97L-mode scaling. Up to 11keV are achieved at 0.9x10 20 m -3 central density. ITB studies using IBW injection have been also continued up to 8T/0.8MA. The Lower Hybrid system has operated at full power allowing to complete the current drive studies at ITER relevant densities. At these density values the electrons and ions are coupled and an increase in the ion temperature is clearly observed. Preliminary sign of enhanced Current Drive efficiency has been obtained in combined injection of Electron Cyclotron and Lower Hybrid waves at magnetic field values lower than the resonant field. Pellet optimisation studies have been performed in order to test the conditions under which a quasi steady state confinement improvement can be obtained and impurity accumulation can be avoided. Ohmic discharges generally exhibit a confinement time in agreement with the ITER97 L-mode scaling. Transient confinement improvement is observed for duration less than one energy confinement time. Radiation Improved mode studies have been started thanks to the recently inserted boronization system which has allowed to reduce the radiated power. Confinement improvement with Neon injection has been observed in 6T/0.9MA discharges. Transport studies on profile stiffness and MHD studies of fast reconnection and snakes will be also presented. (author)

  4. Corral Monitoring System assessment results

    International Nuclear Information System (INIS)

    Filby, E.E.; Haskel, K.J.

    1998-03-01

    This report describes the results of a functional and operational assessment of the Corral Monitoring Systems (CMS), which was designed to detect and document accountable items entering or leaving a monitored site. Its development was motivated by the possibility that multiple sites in the nuclear weapons states of the former Soviet Union might be opened to such monitoring under the provisions of the Strategic Arms Reduction Treaty. The assessment was performed at three levels. One level evaluated how well the planned approach addressed the target application, and which involved tracking sensitive items moving into and around a site being monitored as part of an international treaty or other agreement. The second level examined the overall design and development approach, while the third focused on individual subsystems within the total package. Unfortunately, the system was delivered as disassembled parts and pieces, with very poor documentation. Thus, the assessment was based on fragmentary operating data coupled with an analysis of what documents were provided with the system. The system design seemed to be a reasonable match to the requirements of the target application; however, important questions about site manning and top level administrative control were left unanswered. Four weaknesses in the overall design and development approach were detected: (1) poor configuration control and management, (2) inadequate adherence to a well defined architectural standard, (3) no apparent provision for improving top level error tolerance, and (4) weaknesses in the object oriented programming approach. The individual subsystems were found to offer few features or capabilities that were new or unique, even at the conceptual level. The CMS might possibly have offered a unique combination of features, but this level of integration was never realized, and it had no unique capabilities that could be readily extracted for use in another system

  5. FIRST RESULTS FROM OEDOTENSIOMETRIC TESTS

    Directory of Open Access Journals (Sweden)

    Luigi Cavazza

    2008-09-01

    Full Text Available An oedotensiometer was used to examine to examine the behaviour of sieved sample of a swelling soil (a vertisol as well as of the same soils treated with solution of Na+ + Ca2+ to simulate the soil changes from excessive irrigation with brackish water. The oedometer test consisted in an infiltration of water from below through a ceramic porous plate at a feeding pressure of +10 cm water and successive drainage under a depression mostly of -112 cm of water. The rate of water entry as well as the swelling rate of the sample were monitored. Preliminary considerations regards the domains in which the shrinkage curve of a swelling soil is subdivided and make hypothesis on the swelling process expected when the infiltration from below of the sample is applied. The results support the hypothesis that when the water pressure is applied some water enters rather rapidly in the larger structural pores and is followed later by the swelling in the smaller pores, responsible for the basic domain. This first conclusion demonstrates that the assumption of a simultaneous movement of solid and liquid components in the sample, which is the base of most theoretical developments for swelling soils, cannot be accepted for the tested samples. Some cases with water clogging on the sample surface confirm a late final swelling of the soil and permitted to evaluate the hydraulic conductivity of the swollen soil. These manifestations are more evident in sodicated soils. The loading of the sample reduces the swelling of the sample and seems to reduce its permeability. The reduction of the feeding water pressure further reduces the sample swelling. The draining process from saturated soil sample shows that most of the process occurs in the large pores of the structural domain. This gives the possibility to evaluate the water diffusivity coefficient for the structural domain of the sample. In draining the soil with the highest sodication there was a variation of soil volume

  6. First half 2010 financial results

    International Nuclear Information System (INIS)

    2010-01-01

    The Supervisory Board of the AREVA group presents in this document the financial statements submitted by the Executive Board for the semester ended June 30, 2010. Areva backlog continued to rise in the first half of the year. Areva's revenue is up by more than 6% for the first six months to more than 4 billion euros. The performance of Areva's recurring business continues to improve, reflecting optimization plans deployed in all of the group's business units. However, Areva booked in the first half a non cash reversible accounting adjustment on the value of certain mining assets, following the publication in the second quarter of new prospective data on uranium prices, as well as an additional provision on the EPR project in Finland. Cumulated provisions on OL3 rose to 2.6 billion euros. Capitalizing on lessons learned from this project, Areva has reduced strongly the engineering hours needed for the completion of the nuclear steam supply system for the Taishan 1 and 2 EPR reactors. Net income attributable to owners of the parent rose to 843 million euros, including the 1.3 billion euro gain on the disposal of the Transmission and Distribution business, or 23.82 euros per share. For the full year of 2010, the group anticipates a substantial revenue and backlog growth, an increase in operating income excluding particular items, a negative operating income, and a strong increase in net income attributable to owners of the parent, which includes the capital gain on disposal of the Transmission and Distribution business. First half 2010 financial results in brief: - Backlog of euro 44.1 bn: +euro 1.2 bn compared with June 30, 2009; - Revenue of euro 4.158 bn: +6.4% compared with first half 2009; - Operating income excl. particular items: euro 213 m, for a 5.1% margin; - Operating income: -euro 485 m; - Net income group share: euro 843 m including the euro 1.27 bn gain on the sale of the T and D business; - Earnings per share: euro 23.82; - Net debt of euro 5.152 bn

  7. ROLE OF ABIOTIC AND BIOTIC FACTORS IN RESEARCH OF VARIETES OF WEIGELA (WEIGELA THUNB., CAPRIFOLIACEAE

    Directory of Open Access Journals (Sweden)

    A. V. Savenko

    2015-01-01

    Full Text Available Aim. The success of the introduction of plants depends on their vitality and adaptation to the new conditions of existence. The aim of our study is to identify environmental characteristics of varieties of Weigela to extend the range of ornamental plants under urban ecosystem of Krasnodar. We have analyzed the tolerance of varieties of Weigela to the temperature regime in the introduction region, we explored the complex biotic factors influencing the growth and development of these plants, and also studied the morphological characteristics of pollen and pollen productivity of Weigela flowers.Methods. Evaluation of resistance of varieties of Weigela to a complex of abiotic and biotic factors has been conducted in the field and in the laboratory, taking into account recommendations for ornamental shrubs.Results. Studied Weigela varieties have enough ecological valence to the force of impact of the maximum and minimum air temperatures in the area of the introduction. The most resistant to the complex of summer stress factors are the following varieties of Weigela: 'Candida', 'Nana Variegata', 'Olimpik Flame', 'Red Rrince'. The most heat-resistant varieties are 'Nana Variegata' and 'Olimpik Flame'. The most winter-hardy varieties are 'Candida' and 'Red Rrince', less winter-hardy variety is 'Nana Purpurea'. The most cold-resistant variety is 'Candida'. 'Nana Variegata' produces the highest number of fertile pollen grains. The smallest amount of fertile pollen is formed by 'Nana Purpurea'.Main conclusion. These studies allow us to conclude that all the studied varieties of Weigela are characterized by a high degree of adaptation and deserve widespread use in gardens and parks of the city of Krasnodar.

  8. Maternal and individual heterosis for preweaning daily gain in Nellore × Hereford and Nellore × Angus cattle

    OpenAIRE

    Teixeira, R.A.; Albuquerque, L.G.

    2005-01-01

    Foram utilizados dados de 62.985 animais das raças Nelore, Hereford, Angus e produtos de cruzamentos Nelore × Angus e Nelore × Hereford de rebanhos comerciais a fim de estimar os efeitos de heterose materna e individual para o ganho médio diário no período pré-desmama (GMD). Os valores obtidos de heterose individual e materna considerando-se o valor médio de GMD da população representam um acréscimo de 6,2% e 11,2% no GMD para os animais F1 e filhos de vacas F1, respectivamente. A...

  9. Results after 19 years of testing in a Pinus strobus x P. wallichiana F1 hybrid population

    Directory of Open Access Journals (Sweden)

    I. Blada

    2013-12-01

    Full Text Available Full-sib families were generated from a factorial design between seven female trees of P. strobus and four male trees of P. wallichiana to combine the rapid growth of former species with high resistance to blisterrust (Cronartium ribicola of the latter one. At age two the hybrid families were artificially inoculated with blister-rust and at age six theywere field planted. Total height growth, diameter at 1.3 m, basal area, stem volume, stem straightness and tree survival were measuredat age 19 after planting. Significant (p<0.05 and highly significant (p<0.01; p<0.001 differences among female effects were found for all tested traits including survival suggesting that nuclear additive genescontrolled these traits. Male effects were significant only for stem straightness. In all but one trait the σ2GCA: σ2SCA and σ2GCA-F : σ2GCA-M ratios were in favour of additive variance suggestingthat this variance should be used in the breeding strategy. Narrow-sense heritability at family level was 0.778 for volume growth rateand 0.861 for survival; such high values indicate that the breeding programme, has good chances of success. Two of the 11 tested parentsexhibited significant positive g.c.a. effects for survival after heavy blister-rust inoculation. One parent exhibited highly significantpositive g.c.a. effects for volume growth rate. The three good general combiners should be taken into account in the breeding programme.Estimate of the high-parent heterosis was negative for the volume but positive for survival. For volume, the hybrid mean was 5.9% lowerthan the mean of the eastern white pine but 85.4% greater than blue pine bulk lot for survival. Estimate of low-parent heterosis for survivalwas also positive; i. e. the hybrid population mean was 537.5% greater than eastern white pine. If the hybrids will be used in operationalplanting programs, a variable genetic gain between 6.0 and 10.5% for volume and between 6

  10. Field reactions of interspecific hybrids of tomato ( Solanum ...

    African Journals Online (AJOL)

    Crosses were made on four selected parent plants in a diallel fashion in 2011. Seedlings of the parent plants and their resulting hybrids were ... The hybrids, W x P and wild x insulata could be selected as they had less leaf spot disease severity and high fruit yield. Keywords: disease incidence, disease severity, heterosis, ...

  11. DABANTADA CELESTIN.pmd

    African Journals Online (AJOL)

    Administrateur

    Reciprocal effects were observed for all traits, except for the 50 % flowering day. The best .... analysis shows that GCA effects were highly significant ..... inheritance. CONCLUSION. Results of the study show that, combining ability and heterosis were important. Genetic variation for the characters appeared to be influenced.

  12. The hebridological analysis of productivity traits in pea hybrids

    Directory of Open Access Journals (Sweden)

    Світлана Володимирівна Коблай

    2015-09-01

    Full Text Available To study the nature of inheritance of quantitative traits that influence productivity of pea hybrids were obtained first and second generations for which sample and varieties with different leaf morphotype are served as parental form. As the results of hybridological analysis it is determined the degree of domination and revealed the heterosis combinations

  13. Genetics of wide compatible gene and variability studies in rice ...

    Indian Academy of Sciences (India)

    Hybrid rice technology offers great potential to increase rice production and productivity on a sustainable basis. Exploita- tion of heterosis in rice has resulted in release of ... mercial cultivation. However, rice being the staple food of. Indians, improving its productivity has become a critically important issue (Subbaiah et al.

  14. Search Results | Page 71 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2010-01-01

    Results 701 - 710 of 8490 ... Research results : analyzing the impact of introducing an automated management information system within microfinance institutions. Published date. January 1, 2010. Studies.

  15. Search Results | Page 88 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2010-01-01

    Results 871 - 880 of 8518 ... Research results : analyzing the impact of introducing an automated management information system within microfinance institutions. Published date. January 1, 2010. Studies.

  16. Search Results | Page 72 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2010-01-01

    Results 711 - 720 of 8491 ... Research results : analyzing the impact of introducing an automated management information system within microfinance institutions. Published date. January 1, 2010. Studies.

  17. Comparative Transcriptional Profiling of Three Super-Hybrid Rice Combinations

    Directory of Open Access Journals (Sweden)

    Yonggang Peng

    2014-03-01

    Full Text Available Utilization of heterosis has significantly increased rice yields. However, its mechanism remains unclear. In this study, comparative transcriptional profiles of three super-hybrid rice combinations, LY2163, LY2186 and LYP9, at the flowering and filling stages, were created using rice whole-genome oligonucleotide microarray. The LY2163, LY2186 and LYP9 hybrids yielded 1193, 1630 and 1046 differentially expressed genes (DGs, accounting for 3.2%, 4.4% and 2.8% of the total number of genes (36,926, respectively, after using the z-test (p < 0.01. Functional category analysis showed that the DGs in each hybrid combination were mainly classified into the carbohydrate metabolism and energy metabolism categories. Further analysis of the metabolic pathways showed that DGs were significantly enriched in the carbon fixation pathway (p < 0.01 for all three combinations. Over 80% of the DGs were located in rice quantitative trait loci (QTLs of the Gramene database, of which more than 90% were located in the yield related QTLs in all three combinations, which suggested that there was a correlation between DGs and rice heterosis. Pathway Studio analysis showed the presence of DGs in the circadian regulatory network of all three hybrid combinations, which suggested that the circadian clock had a role in rice heterosis. Our results provide information that can help to elucidate the molecular mechanism underlying rice heterosis.

  18. Ranking XPaths for extracting search result records

    NARCIS (Netherlands)

    Trieschnigg, Rudolf Berend; Tjin-Kam-Jet, Kien; Hiemstra, Djoerd

    2012-01-01

    Extracting search result records (SRRs) from webpages is useful for building an aggregated search engine which combines search results from a variety of search engines. Most automatic approaches to search result extraction are not portable: the complete process has to be rerun on a new search result

  19. Intersection theorems, inclusion theorems and related results

    International Nuclear Information System (INIS)

    Jiang Jiahe.

    1986-07-01

    In the present paper derived from the principle of KKM (Knaster, Kuratowski, and Mazurkiewicz) mappings are some intersection theorems, inclusion theorems and related results, generalizing a number of known results. (author)

  20. Search Results | Page 8 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2009-01-01

    Results 71 - 80 of 132 ... Empowering regulators to protect consumer rights in the ICT sector, Introductory Workshop, Lusaka, 13 August 2009. Published date. January 1, 2009. Reports. EAST AFRICA RESEARCH RESULTS POLICY MAKING ...

  1. Search Results | Page 29 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 281 - 290 of 369 ... Social Psychology in Post Conflict Colombia. Psychosocial trauma resulting from the Colombian armed conflict constitutes a pressing social and mental health issue that requires immediate attention. Project.

  2. Search Results | Page 797 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Search Results. Showing 7961 - 7970 of 8491 results. Story. Health Natural Resources Mining ECOHEALTH ... CASE STUDY: Latin America — An engine for rural development in Latin America. Research in Action. Biodiversity Gender Crops ...

  3. Search Results | Page 845 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Search Results. Showing 8441 - 8450 of 8494 results. Webpage. Contact Us. Got a question? Get in touch with us, and we'll be happy to answer your request. Webpage. Annual public meetings. Our chance to share the results of our work with Canadians and to answer their questions in person. Webpage ...

  4. Search Results | Page 6 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2013-10-01

    Results 51 - 60 of 60 ... Results show that a 1 per cent increase in port efficiency results in a 1.051 per cent decrease in the poverty index. The level of Chinese trade facilitation is near the world average, but among ASEAN countries there is a big gap. Published date. October 1, 2013. Reports. EXPORT ORIENTED ...

  5. Differential gene expression in an elite hybrid rice cultivar (Oryza sativa, L and its parental lines based on SAGE data

    Directory of Open Access Journals (Sweden)

    Chen Chen

    2007-09-01

    Full Text Available Abstract Background It was proposed that differentially-expressed genes, aside from genetic variations affecting protein processing and functioning, between hybrid and its parents provide essential candidates for studying heterosis or hybrid vigor. Based our serial analysis of gene expression (SAGE data from an elite Chinese super-hybrid rice (LYP9 and its parental cultivars (93-11 and PA64s in three major tissue types (leaves, roots and panicles at different developmental stages, we analyzed the transcriptome and looked for candidate genes related to rice heterosis. Results By using an improved strategy of tag-to-gene mapping and two recently annotated genome assemblies (93-11 and PA64s, we identified 10,268 additional high-quality tags, reaching a grand total of 20,595 together with our previous result. We further detected 8.5% and 5.9% physically-mapped genes that are differentially-expressed among the triad (in at least one of the three stages with P-values less than 0.05 and 0.01, respectively. These genes distributed in 12 major gene expression patterns; among them, 406 up-regulated and 469 down-regulated genes (P Conclusion We improved tag-to-gene mapping strategy by combining information from transcript sequences and rice genome annotation, and obtained a more comprehensive view on genes that related to rice heterosis. The candidates for heterosis-related genes among different genotypes provided new avenue for exploring the molecular mechanism underlying heterosis.

  6. Performance of broodstock and hybrid juvenile of Egyptian and sangkuriang Clarias gariepinus strains

    Directory of Open Access Journals (Sweden)

    Putri Zulfania

    2016-02-01

    Full Text Available ABSTRACT This study was conducted to evaluate reproduction of broodstock and intraspecific hybrid juvenile performance of Egyptian (M and sangkuriang (S strain African catfish Clarias gariepinus at nursery phase. Intraspecific hybridization of African catfish was carried out reciprocally (SM and MS and purebreed (SS and MM, each was with three replicates. Fish spawning was conducted by artificial fertilization, and larvae were reared at 1st, 2nd and 3rd nursery phases, subsequently. The results showed that broodstock performance (male and female of both strains were not significantly different (P>0.05 on all reproduction traits, except female’s gonadosomatic index. Fertilization and hatching rates of all hybrids were not significantly different (P>0.05. MM juvenile had higher growth performances than other juvenile hybrids. Heterosis of total length, standard length, and body weight were varied, whereas the survival showed positive heterosis. SM juvenile showed positive growth heterosis in 3rd nursery phase (total length, standard length, and body weight were 2.61%; 2.16%, and 4.79% respectively. Survival heterosis of MS juvenile (24.20% for total length; 103.13% for standard length and 11.62% body weight was higher than SM juvenile (6.86%; 48.57%, and 3.09% on all nursery phases Keywords: African catfish, intraspecific hybridization, growth, survival, heterosis  ABSTRAK Penelitian ini dilakukan untuk menguji performa reproduksi induk dan benih hasil hibridisasi intraspesifik ikan lele Afrika Clarias gariepinus strain Sangkuriang (S dan Mesir (M pada fase pendederan. Hibridisasi intraspesifik ikan lele Afrika dilakukan secara resiprokal (SM dan MS dan galur murni (SS dan MM masing-masing dengan tiga ulangan. Pemijahan dilakukan secara buatan dan larva yang dihasilkan dipelihara pada fase pendederan pertama, kedua, dan ketiga. Hasil penelitian menunjukkan bahwa performa induk ikan lele jantan dan betina pada kedua strain tidak berbeda

  7. Applying DSM evaluation results to utility planning

    Energy Technology Data Exchange (ETDEWEB)

    Baxter, L.W.

    1995-07-01

    This paper describes the results of a study to assess the application of DSM evaluation results to utility forecasting and planning. The paper has three objectives: (1) identify forecasting and planning applications of evaluation studies, (2) identify major obstacles and problems associated with applying evaluation results to forecasting and planning, and (3) suggest approaches to address the major problems. The paper summarizes results from interviews with utilities, regulators, and consultants to determine how the utility industry currently applies evaluation results in forecasting and planning. The paper also includes results from a detailed case study of Sacramento Municipal Utility District (SMUD) and Southern California Edison Company (SCE), two utilities with large DSM programs and active evaluation efforts.

  8. Monthly results of measurements, January 1987

    International Nuclear Information System (INIS)

    1987-01-01

    This report of the SCPRI exposes an interpretation of the principal results concerning the routine monitoring of environmental radioactivity in France: atmospheric dusts, rainwater, surface water, underground water, sewage water, drinking water, food chain (milk, vegetables, cattle thyroids, fishes), sea water around nuclear plant sites and other sites, sediments. The activities of various radioisotopes are presented in tables. This report exposes also the results of special radiation measurements resulting from the Chernobyl accident, in various food samples [fr

  9. Monthly results of measurements, July 1986

    International Nuclear Information System (INIS)

    1986-08-01

    This report of the SCPRI exposes an interpretation of the principal results concerning the routine monitoring of environmental radioactivity in France: atmospheric dusts, rainwater, surface water, underground water, sewage water, drinking water, food chain (milk, vegetables, fishes), sea water around nuclear plant sites and other sites. The activities of various radioisotopes are presented in tables. This report exposes also the results of special radiation measurements resulting from the Chernobyl accidents [fr

  10. Monthly results of measurements, february 1987

    International Nuclear Information System (INIS)

    1987-03-01

    This report of the SCPRI exposes an interpretation of the principal results concerning the routine monitoring of environmental radioactivity in France: atmospheric dusts, rainwater, surface water, underground water, sewage water, drinking water, food chain (milk, vegetables, fishes), sea water around nuclear plant sites and other sites. The activities of various radioisotopes are presented in tables. This report exposes also the results of special radiation measurements resulting from the Chernobylsk accident [fr

  11. Monthly results of measurements, May 1987

    International Nuclear Information System (INIS)

    1987-06-01

    This report of the SCPRI exposes an interpretation of the principal results concerning the routine monitoring of environmental radioactivity in France: atmospheric dusts, rainwater, surface waters, underground water, drinking water, sewage water, food chain (milk, vegetables, fishes), sea water around nuclear plant sites and other sites, sediments. The activities of various radioisotopes are presented in tables. This report exposes also the results of special radiation measurements resulting from the Chernobyl accident [fr

  12. Setting Priorities Personal Values, Organizational Results

    CERN Document Server

    (CCL), Center for Creative Leadership

    2011-01-01

    To be a successful leader, you need to get results. To get results, you need to set priorities. This book can help you do a better job of setting priorities, recognizing the personal values that motivate your decision making, the probable trade-offs and consequences of your decisions, and the importance of aligning your priorities with your organization's expectations. In this way you can successfully meet organizational objectives and consistently produce results.

  13. Monthly results of measurements, Apr 1988

    International Nuclear Information System (INIS)

    1988-04-01

    This report of the SCPRI exposes an interpretation of the principal results concerning the routine monitoring of environmental radioactivity in France: atmospheric dusts, rainwater, surface water, underground water, sewage water, drinking water, food chain (milk, vegetables, fishes), sea water around nuclear plant sites and other sites. The activities of various radioisotopes are presented in tables. This report exposes also the results of special radiation measurements resulting from the Chernobyl accident [fr

  14. Monthly results of measurements, november 1986

    International Nuclear Information System (INIS)

    1986-12-01

    This report of the SCPRI exposes an interpretation of the principal results concerning the routine monitoring of environmental radioactivity in France: atmospheric dusts, rainwater, surface water, underground water, sewage water, drinking water, food chain (milk, vegetables, fishes), sea water around nuclear plant sites and other sites. The activities of various radioisotopes are presented in tables. This report exposes also the results of special radiation measurements resulting from the Chernobyl accident [fr

  15. Monthly results of measurements, August 1986

    International Nuclear Information System (INIS)

    1986-08-01

    This report of the SCPRI exposes an interpretation of the principal results concerning the routine monitoring of environmental radioactivity in France: atmospheric dusts, rainwater, surface water, underground water, sewage water, drinking water, food chain (milk, vegetables, fishes) seawater around nuclear plant sites and other sites. The activities of various radioisotopes are presented in tables. This report exposes also the results of special radiation measurements resulting from the Chernobyl accident [fr

  16. Monthly results of measurements April 1987

    International Nuclear Information System (INIS)

    1987-05-01

    This report of the SCPRI exposes an interpretation of the principal results concerning the routine monitoring of environmental radioactivity in France: atmospheric dusts, rainwater, surface water, underground water, sewage water, drinking water, food chain (milk, vegetables, fishes), sea water around nuclear plant sites and other sites. The activities of various radioisotopes are presented in tables. This report exposes also the results of special radiation measurements resulting from the Chernobyl accident [fr

  17. Monthly results of measurements, october 1987

    International Nuclear Information System (INIS)

    1987-10-01

    This report of the SCPRI exposes an interpretation of the principal results concerning the routine monitoring of environmental radioactivity in France: atmospheric dusts, rainwater, surface waters, underground water, drinking water, sewage water, food chain (milk, vegetables, fishes), seawater around nuclear plant sites and other sites, sediments. The activities of various radioisotopes are presented in tables. This report exposes also the results of special radiation measurements resulting from the Chernobyl accident [fr

  18. Monthly results of measurements, August 1987

    International Nuclear Information System (INIS)

    1987-08-01

    This report of the SCPRI exposes an interpretation of the principal results concerning the routine monitoring of environmental radioactivity in France: atmospheric dusts, rainwater, surface waters, underground water, drinking water, sewage water, food chain (milk, vegetables, fishes), sea water around nuclear plant sites and other sites, sediments. The activities of various radioisotopes are presented in tables. This report exposes also the results of special radiation measurements resulting from the Chernobyl accident [fr

  19. Monthly results of measurements, October 1986

    International Nuclear Information System (INIS)

    1986-11-01

    This October 1986 report of the SCPRI exposes an interpretation of the principal results concerning the routine monitoring of environmental radioactivity in France: atmospheric dusts, rainwater, surface water, underground water, sewage water, drinking water, food chain (milk, vegetables, fishes), sea water around nuclear plant sites and other sites. The activities of various radioisotopes are presented in tables. This report exposes also the results of special radiation measurements resulting from the Chernobyl accident, with an exceptional control of migratory birds [fr

  20. Monthly results of measurements, Nov 1988

    International Nuclear Information System (INIS)

    1988-01-01

    This report of the SCPRI exposes an interpretation of the principal results concerning the routine monitoring of environmental radioactivity in France: atmospheric dusts, rainwater, surface water, underground water, sewage water, drinking water, food chain (milk, vegetables, fishes), sea water around nuclear plant sites and other sites. The activities of various radioisotopes are presented in tables. This report exposes also the results of special radiation measurements resulting from the Chernobyl accident [fr

  1. Crossbreeding to increase beef production: additive and non ...

    African Journals Online (AJOL)

    The indicus x sanga and indicus x taurus direct heterosis effects on all weight traits were greater than either the taurus x sanga or taurus x taurus effects, whereas the indicus x sanga maternal heterosis effect was consistently less than the estimated taurus x sanga maternal heterosis effect. Keywords: Direct effects, heterosis, ...

  2. Search Results | Page 795 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 7941 - 7950 of 8490 ... Development research in countries in transition: Introduction. Research in Action. Health Ecohealth CONTAMINATION Pollution MERCURY POISONING, NERVOUS SYSTEM MERCURY Gender ...

  3. Search Results | Page 795 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 7941 - 7950 of 8491 ... Development research in countries in transition: Introduction. Research in Action. Health Ecohealth CONTAMINATION Pollution MERCURY POISONING, NERVOUS SYSTEM MERCURY Gender ...

  4. EDF - Electricite de France, 2017 annual Results

    International Nuclear Information System (INIS)

    2018-01-01

    The EDF Group is an integrated energy supplier operating in a wide range of electricity-related businesses: generation, transmission, distribution, sale and trading of energy. It is the main operator in the French electricity market and one of the leading electricity groups in Europe. The EDF Group has built a business model balanced between deregulated and regulated operations in France and an international presence. This document is EDF Group's annual Results for 2017. It is made of several reports: The annual Results press release, The annual Results presentation and its appendices, The financial report, The Consolidated Financial Statements at 31 December 2017, The Statutory Auditors' report, The transcript of the Investors and Analysts conference, The 3rd quarter 2017 results press release, the 3rd quarter 2017 results presentation and its appendices, The transcript of the Investors and Analysts conference, The first quarter 2017 results press release, The first quarter 2017 results presentation with its appendices, The transcript of the Investors and Analysts conference, The 2017 half-year results press release, The 2017 half-year results presentation with its appendices, The 2017 half-year financial report, The Consolidated Financial Statements at 30 June 2017, The 2017 half-year Statutory Auditors' report, The transcript of the Investors and Analysts conference

  5. Search Results | Page 45 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2007-01-01

    Results 441 - 450 of 8491 ... Issues : global change - climate change and variability / risk - vulnerability / research - capacity building - governance / science - communication - decision processes. Published date. January 1, 2007. Studies.

  6. Search Results | Page 831 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2005-01-01

    Results 8301 - 8310 of 8491 ... E-Commerce in the Asian Context: Selected Case Studies. E-commerce in Asia has been receiving considerable attention as a result of the proliferation of Internet connectivity and technologies in the region. Publication Date. January 1, 2005. Books ...

  7. Search Results | Page 4 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 31 - 40 of 157 ... Climate Change and Saltwater Intrusion along the Eastern Mediterranean: Socioeconomic Vulnerability. The Eastern Mediterranean is highly vulnerable to saltwater intrusion into the freshwater aquifers along its coasts. The degradation of these aquifers would result in serious socioeconomic ...

  8. Search Results | Page 840 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2013-09-25

    Results 8391 - 8400 of 8492 ... As the fourth volume in a series of five books bringing together the results of intensive research on the national systems of innovation (NSI) in the BRICS countries – Brazil, Russia, India, China, and South Africa, this book explores the relation. Publication Date. September 25, 2013. Books ...

  9. Search Results | Page 81 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2011-01-01

    Results 801 - 810 of 1119 ... In sub-Saharan Africa (SSA), rainfed agriculture is the dominant source of food production. Over the past 50 years much agronomic crop research has been undertaken, and the results of such work are used in formulating recommendations for farmers. Published date. January 1, 2011. Research in ...

  10. Search Results | Page 8 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 71 - 80 of 101 ... Violent conflict has been repeatedly shown to result in severe, long-term social and mental health problems for exposed children and adolescents. Project ... Local practices pertaining to biodiversity conservation, crop improvement and natural resource management are under stress. Project.

  11. Search Results | Page 33 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 321 - 330 of 439 ... Violent conflict has been repeatedly shown to result in severe, long-term social and mental health problems for exposed children and adolescents. Project ... Nepal, Peru). Local practices pertaining to biodiversity conservation, crop improvement and natural resource management are under stress.

  12. Search Results | Page 831 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2005-01-01

    Results 8301 - 8310 of 8491 ... E-Commerce in the Asian Context: Selected Case Studies. E-commerce in Asia has been receiving considerable attention as a result of the proliferation of Internet connectivity and technologies in the region. Publication Date. January 1, 2005. Books.

  13. Recent results on SUSY searches from CMS

    CERN Multimedia

    CERN. Geneva

    2013-01-01

    The latest results on searches for Supersymmetry from CMS are reviewed. We present searches for direct stop production, searches in final states with four W bosons and multiple b-quarks, and searches for R-Parity violating SUSY. The results use up to 20/fb of data from the 8 TeV LHC run of 2012.

  14. Search Results | Page 7 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 61 - 70 of 8491 ... Enhancing community health workers support for maternal, adolescent and newborn health project plus contraception in rural Tanzania (IMCHA). Access to the ... Most deaths in sub-Saharan Africa occur without medical attention, and as a result, the causes of death (COD) remain unknown. Project.

  15. Search Results | Page 12 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 111 - 120 of 8518 ... Research shows that high gender inequity translates into poor health for mothers, pregnant women, and children. At the community and ... child & maternal mortality. Most deaths in sub-Saharan Africa occur without medical attention, and as a result, the causes of death (COD) remain unknown.

  16. Search Results | Page 12 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 111 - 120 of 8517 ... In April 2016, Burkina Faso became the first African country to introduce a national policy for universal and free healthcare for pregnant women, new mothers, and ... Most deaths in sub-Saharan Africa occur without medical attention, and as a result, the causes of death (COD) remain unknown.

  17. Search Results | Page 12 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 111 - 120 of 8489 ... Statistical alliance for vital events: Strengthening reporting & program uses of facility-based child & maternal mortality. Most deaths in sub-Saharan Africa occur without medical attention, and as a result, the causes of death (COD) remain unknown. Project.

  18. Search Results | Page 4 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 31 - 40 of 80 ... Public opinion polls have shown that security tops the list of public concerns in Central America, Haiti and Mexico. The current project is the result of a call for proposals on the links between youth violence, organized crime and insecurity. Project.

  19. 20 months UNILAC - first experiments and results

    International Nuclear Information System (INIS)

    Schwalm, D.

    1978-01-01

    The first few results obtained with the UNILAC heavy ion accelerator are described in an elementary survey. The results pretain to the fields of solid state research, quasi-atoms, nuclear coulomb excitation, heavy ion fusion and superheavy elements, and deep inelastic heavy ion reactions. (WL) [de

  20. Search Results | Page 847 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 8461 - 8470 of 8518 ... Discover our Board of Governors, and meet the members who share a passion for international development work. Webpage. -. Contact Us. Got a question? Get in touch with us, and we'll be happy to answer your request. Webpage. -. Annual public meetings. Our chance to share the results of ...

  1. Search Results | Page 53 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2009-01-01

    Search Results. Showing 521 - 530 of 8491 results. Studies ... Promoting evidence-based decision making in health systems : establishing knowledge translation platform; presented at the WHO/TDR/TRG Conference on Implementation Research, Abuja, Nigeria, 4th - 8th May 2009. Published date. January 1, 2009 ...

  2. Search Results | Page 2 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 11 - 20 of 374 ... During the 2000s, economic growth coupled with increased social investment reduced poverty and increased labour market opportunities in Latin America. ... As a result of climate change, population growth, and rapid unplanned urbanization, cities in developing countries are both the main trigger of ...

  3. MiniBooNE Oscillation Results

    International Nuclear Information System (INIS)

    Djurcic, Zelimir

    2009-01-01

    These proceedings summarize the MiniBooNE ν μ → ν e results, describe the first (bar ν) μ → (bar ν) e result, and current analysis effort with the NuMI neutrinos detected in the miniBooNE detector

  4. HERA results on QCD and EW physics

    International Nuclear Information System (INIS)

    Zarnecki, A.F.

    1997-01-01

    Selected HERA results on QCD and EW interactions are presented. They include the measurement of the proton structure function and its analysis in terms of the QCD evolution, as well as results concerning deep inelastic scattering at very low and very high Q 2 . Selected HERA limits on new physics and parameters which extend the standard model are also presented. (author)

  5. Annual results 2004; Resultats annuels 2004

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2005-07-01

    This 2004 annual evaluation of the french RTE company (electric power transport network) provides information on the 2004 results on: institutional information, financial results, customers and market, industrial resources, environment and consultation, human resources and international aspects. (A.L.B.)

  6. Search Results | Page 23 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 221 - 230 of 1804 ... Enhanced Preservation of Fruits Using Nanotechnology (CIFSRF Phase 2). Poor handling of fruit results in post-harvest losses of nearly 40% in tropical countries. This project aims to extend the harvest and improve fruit quality and shelf life. Project ...

  7. Search Results | Page 792 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Search Results. Showing 7911 - 7920 of 8518 results. Research in Action. Ecohealth Disease control. Tackling Chagas disease in Central America. Research in Action. Natural disasters. Averting disaster at the community level. Research in Action. Access to ICT. Texting to save lives in South Asia. Research in Action.

  8. Search Results | Page 792 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Search Results. Showing 7911 - 7920 of 8491 results. Research in Action. TECHNOLOGICAL CHANGE Access to ICT Networking. The future of Africa is mobile. Research in Action. Movers and shakers: David M. Malone. Research in Action. Social assistance. Selling security to the poor. Research in Action. Justice and ...

  9. Recent e+e- results from DESY

    International Nuclear Information System (INIS)

    Fluegge, G.

    1980-01-01

    The author presents some results for e + e - collisions obtained at DORIS and PETRA. These results concern hadron productions, the production of quarks and heavy leptons, tests of quantum electrodynamics and quantum chromodynamics, total cross sections, and jets. (HSI) 891 HSI/HSI 892 CKA

  10. Search Results | Page 7 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 61 - 70 of 8490 ... Statistical alliance for vital events: Strengthening reporting & program uses of facility-based child & maternal mortality. Most deaths in sub-Saharan Africa occur without medical attention, and as a result, the causes of death (COD) remain unknown. Project.

  11. Computations for a condenser. Experimental results

    International Nuclear Information System (INIS)

    Walden, Jean.

    1975-01-01

    Computations for condensers are presented with experimental results. The computations are concerned with the steam flux at the condenser input, and inside the tube bundle. Experimental results are given for the flux inside the condenser sleeve and the flow passing through the tube bundle [fr

  12. Some Results on Soft Multi Topology

    Directory of Open Access Journals (Sweden)

    Deniz Tokat

    2013-06-01

    Full Text Available In this article, at first we recall the concept of soft multiset. Then some results which we obtained on soft multisets were given. Moreover, in this paper, the notion of soft multi topology was introduced and some results on soft multi topology and the concept of the soft multi base were presented.

  13. Danish Anaesthesia Allergy Centre - preliminary results

    DEFF Research Database (Denmark)

    Garvey, L H; Roed-Petersen, J; Menné, T

    2001-01-01

    . Patients are tested with all substances they were exposed to, including antibiotics, colloids, latex and chlorhexidine. RESULTS: A total of 68 patients have been referred to date (July 2001) and 36 have completed investigations. Positive test results were mainly seen in patients with more severe reactions...

  14. On degree phrases and result clauses

    NARCIS (Netherlands)

    Rijkhoek, Paulien Dea

    1998-01-01

    This dissertation consists of two parts, one on degree phrases and one on result clauses. Sentence (1) below exemplifies a result clause construction: (1) Zij had zo mooi gezongen dat het publiek er stil van was she has so beautifully sang that the audience there silent of was ‘She had sung so

  15. Search Results | Page 41 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 401 - 410 of 8491 ... Diseases that result from an infection are most often resolved by cells that use an immune response to clear foreign agents. Project. -. Regulation of stem-cell mediated host immunity by the sphingolipid pathway. Changes in the functioning of the human immune system are the main cause for many ...

  16. Search Results | Page 12 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 111 - 120 of 197 ... In most societies, sex work is highly stigmatized and sex workers are subject to blame, disapproval and discrimination. As a result, violence against individuals involved in sex work is seldom visible and, in some contexts, even condoned. Project.

  17. Search Results | Page 92 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 911 - 920 of 1119 ... Short-term collaborations between Canadian and African researchers has generated compelling results on such pressing issues as maternal and child health, climate change impacts, and alternative energy sources. The Canada Africa Research Exchange Grants (CAREG) program fostered ...

  18. Methods for distributing results in exploratory partnerships

    OpenAIRE

    Gardet, Elodie; Felix, Pierre-Laurent

    2013-01-01

    International audience; Development partnerships enable companies to develop new products and/or processes while sharing costs. In addition to uncertainty and increased risk, these partnerships necessitate adapted management techniques. In particular, partners must determine the distribution of results and methods of distribution. This article describes different results in development partnerships according to their methods of distribution. A qualitative study of three exploratory projects, ...

  19. An existence result for hemivariational inequalities

    Directory of Open Access Journals (Sweden)

    Zsuzsanna Dalyay

    2004-03-01

    Full Text Available We present a general method for obtaining solutions for an abstract class of hemivariational inequalities. This result extends many results to the nonsmooth case. Our proof is based on a nonsmooth version of the Mountain Pass Theorem with Palais-Smale or with Cerami compactness condition. We also use the Principle of Symmetric Criticality for locally Lipschitz functions.

  20. Search Results | Page 41 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 401 - 410 of 8491 ... Improving microphage innate immunity by modulating protein tyrosine phosphatases: The complete mouse and human PTPomes. Diseases that result from an infection are most often resolved by cells that use an immune response to clear foreign agents. Project.

  1. Search Results | Page 25 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 241 - 250 of 260 ... IDRC-funded researchers have identified coastal areas in the Nile Delta that may be vulnerable to sea level rise using Geographical Information Systems (GIS). Results indicate ... The challenge of collecting data on sensitive issues like gender-based violence is well-documented across the globe.

  2. Modeling clicks beyond the first result page

    NARCIS (Netherlands)

    Chuklin, A.; Serdyukov, P.; de Rijke, M.

    2013-01-01

    Most modern web search engines yield a list of documents of a fixed length (usually 10) in response to a user query. The next ten search results are usually available in one click. These documents either replace the current result page or are appended to the end. Hence, in order to examine more

  3. Quantum chromodynamics results from HERA and JLAB

    Indian Academy of Sciences (India)

    Abstract. Recent QCD results from electron–proton interactions at HERA and JLAB are pre- sented. Inclusive cross-section measurements as well as studies of the hadronic final state like jet production or the production of heavy quarks are discussed. The results are compared with pertur- bative QCD predictions and their ...

  4. The possible distortion of autoradiographic results

    International Nuclear Information System (INIS)

    Kozlov, A.A.; Tumanushvili, G.D.

    1980-01-01

    The effect of radioactive labelling (H 3 -thymidine) on the infusorian division is studied. The presented results show that introduction of labelled compounds results in accelerating infusorian cell division v. Thorough inestigation of labelled compound effect with low activity on the parameters of cell division and the search of methods to eliminate distortions able to appear in autoradiographic experiments is expedient [ru

  5. Search Results | Page 840 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2015-11-17

    Results 8391 - 8400 of 8489 ... "IDRC always has been focused on achieving concrete results — the research we support is too important to stay on the shelf,” IDRC's Acting Chairperson went on to say at the meeting, held in Ottawa on November 17, 2015. Published date. November 24, 2015. News. Health Miscellaneous ...

  6. Search Results | Page 62 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2007-01-01

    Search Results. Showing 611 - 620 of 8490 results. Studies. -. IDE - DACKANA NGO capacity building project beneficiary profile : Lovely Musonda. Published date. January 1, 2007. Studies. -. PRISM, Poverty Reduction Irrigation Smallholder Markets : a presentation on the IDE PRISM approach to enabling smallholder ...

  7. Search Results | Page 8 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 71 - 80 of 8491 ... During the 2000s in Latin America and the Caribbean, 1.4 million people lost their lives as a result of violent crime. Cities across the region are at the epicentre of a regional security crisis. Project. Systematic and comprehensive analysis of mutant p53 proteins in lung cancer in vitro and in vivo.

  8. Search Results | Page 827 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 8261 - 8270 of 8491 ... For the one billion people living in the world's poorest countries, where the burden of disease is highest, those who are born or who die are still ... For research results to improve people's lives, they must reach decision-makers who can use them to develop more effective policies and practices.

  9. Search Results | Page 803 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Search Results. Showing 8021 - 8030 of 8491 results. Research in Action. Water ... Trade, jobs, and wages: Does exporting matter for the poor in South Africa? Research in Action. Water. Working to reverse a water deficit. Research in Action. Ecohealth ...

  10. Result disambiguation in web people search

    NARCIS (Netherlands)

    Berendsen, R.; Kovachev, B.; Nastou, E.; de Rijke, M.; Weerkamp, W.

    2012-01-01

    We study the problem of disambiguating the results of a web people search engine: given a query consisting of a person name plus the result pages for this query, find correct referents for all mentions by clustering the pages according to the different people sharing the name. While the problem has

  11. Search Results | Page 838 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 8371 - 8380 of 8518 ... This risk assessment provides baseline information for study sites useful for future risk assessment and adaptation options. Published date ... On the development of climate data visualization tool for interpretation of empirical results from climate model : does it add value to different stakeholders?

  12. Search Results | Page 12 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 111 - 120 of 178 ... Evidence Informed Policy Network (EVIPNet) for Better Health Policymaking in sub-Saharan Africa. Research results have no value unless they are made available for due consideration by practitioners and policymakers. Scientific articles are not enough.

  13. Search Results | Page 32 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 311 - 320 of 369 ... According to the results of the IDRC-supported project, Brazilian Youth and Democracy (102622), young people want to find out more about ... This project follows two years of successful research under project 102661 on forced migration of Colombians within Colombia and to Ecuador and Canada.

  14. Search Results | Page 835 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Search Results. Showing 8341 - 8350 of 8491 results. Research in Action. Innovation FISHERY RESOURCES WASTE MANAGEMENT. Cash from trash: Using and reducing fish bycatch. Research in Action. TECHNOLOGICAL CHANGE Innovative applications. Appropriate technology: Often, the best answers can be found ...

  15. Search Results | Page 10 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 91 - 100 of 8517 ... Uganda has a history of societal pressures that have sometimes resulted in violence such as insurgencies, armed conflict, and criminal activities, ... Cellular senescence is a programmed response to oncogenic (tumour-causing) stress that aims to halt the expansion of cells with malignant potential.

  16. Search Results | Page 8 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 71 - 80 of 162 ... PanAf research agenda on the pedagogical integration of ICTs : phase 1; final report. The results of the first phase of PanAf''s research point to significant disparity in access and use of ICTs in schools based on the public/private, and rural/urban divides, and highlight the need for comparative analysis ...

  17. Search Results | Page 845 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 8441 - 8450 of 8491 ... Risk management and audit. We reduce risk via a sound governance structure, robust management processes, effective systems, and internal controls. Webpage. Evaluation. Evaluations ensure we use public funds effectively, assess the results of our work, and learn as an organization.

  18. Search Results | Page 847 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 8461 - 8470 of 8517 ... Risk management and audit. We reduce risk via a sound governance structure, robust management processes, effective systems, and internal controls. Webpage. -. Evaluation. Evaluations ensure we use public funds effectively, assess the results of our work, and learn as an organization.

  19. Search Results | Page 847 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Search Results. Showing 8461 - 8470 of 8491 results. Research in Action ... Québécois and Beninese researchers collaborate in the fight against AIDS. Research in Action. Natural disasters ... Joining forces to find answers — The International Research Chairs Initiative. Research in Action.

  20. Search Results | Page 5 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 41 - 50 of 138 ... PanAf research agenda on the pedagogical integration of ICTs : phase 1; final report. The results of the first phase of PanAf''s research point to significant disparity in access and use of ICTs in schools based on the public/private, and rural/urban divides, and highlight the need for comparative analysis ...

  1. Search Results | Page 839 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2013-09-27

    Results 8381 - 8390 of 8492 ... As the fifth volume in a series of five books bringing together the results of intensive research on the national systems of innovation (NSI) in the BRICS countries – Brazil, Russia, India, China, and South Africa, this book analyzes the financing. Publication Date. September 27, 2013. Books ...

  2. Monitoring the Future 2014 Survey Results

    Science.gov (United States)

    ... Survey Results Synthetic Cannabinoids (K2/Spice) Unpredictable Danger Drug and Alcohol Use in College-Age Adults in 2016 Monitoring the Future 2016 Survey Results Drug and Alcohol Use in College-Age Adults in 2015 View All NIDA Home ...

  3. Search Results | Page 10 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 91 - 100 of 8492 ... During the 2000s in Latin America and the Caribbean, 1.4 million people lost their lives as a result of violent crime. Cities across the region are at the epicentre of a regional security crisis. Project. Grants and awards: Gender equality and scaling digital innovation. With the adoption of the Sustainable ...

  4. Search Results | Page 13 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 121 - 130 of 178 ... Sensitive Index to Assess Risk of Morbidity in Undernutrition. Undernutrition in children continues to be a major public health issue in India. Undernutrition is associated with impaired immune function, which results in increased susceptibility to infection possibly leading to death. Project ...

  5. Search Results | Page 7 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2009-01-01

    Results 61 - 70 of 96 ... This article focuses on the epidemiological methods and results of a global Ecohealth study that explored the complexity of the relationship between ecological, biological, economical, social and political factors and vector presence. Published date. January 1, 2009. Research in Action. Gender ...

  6. Search Results | Page 831 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2005-01-01

    Results 8301 - 8310 of 8492 ... E-Commerce in the Asian Context: Selected Case Studies. E-commerce in Asia has been receiving considerable attention as a result of the proliferation of Internet connectivity and technologies in the region. Publication Date. January 1, 2005. Books.

  7. Search Results | Page 4 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 31 - 40 of 1119 ... This call will support cutting edge applied field and/or laboratory research projects with the potential to generate high impact and innovative results with ... In Haiti, a high percentage of the population is exposed to aflatoxins — poisonous and cancer-causing chemicals growing in soil, decaying ...

  8. Enova results report 2005; Enova resultatrapport 2005

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    In 2005 Enova entered into agreements with 186 projects that together provided an energy result of 2 TWh. The result is almost evenly divided between projects providing higher energy production and projects that reduce energy use. The energy production consists of 585 GWh in new wind power and 409 GWh in new heat energy in 2005. Overall for the period 2001 to 2005, Enova contracted for energy results of well over 6.6 TWh. Enova is doing well in relation to the objectives set for its activities.

  9. IceCube Results and PINGU Perspectives

    DEFF Research Database (Denmark)

    Koskinen, David Jason

    2015-01-01

    The last three years of IceCube operation with the completed detector have resulted in a plethora of results, including the first observation of high energy astrophysical neutrinos, tests of a possible neutrino flux from atmospheric charm meson decay, and competitive results of neutrino oscillati...... from atmospheric muon neutrino disappearance. Based on the success of IceCube, a new low energy in-fill, known as the Precision IceCube Next Generation Upgrade, is being proposed with the primary physics goal of resolving the ordering of the neutrino mass hierarchy....

  10. EDF - Electricite de France, 2005 annual Results

    International Nuclear Information System (INIS)

    2006-01-01

    The EDF Group is an integrated energy supplier operating in a wide range of electricity-related businesses: generation, transmission, distribution, sale and trading of energy. It is the main operator in the French electricity market and one of the leading electricity groups in Europe. The EDF Group has built a business model balanced between deregulated and regulated operations in France and an international presence. This document is EDF Group's annual Results for 2005. It is made of several reports: the 2005 Annual Results presentation, the consolidated financial statements at 31 December 2005, the 2005 Half-year results presentation, and the Consolidated financial statements at 30 June 2005

  11. Search Results | Page 801 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 8001 - 8010 of 8491 ... Research in the Middle East and North Africa — Lebanon's ESDU: Championing research for development. Research in Action. Food and Agriculture Urban agriculture POVERTY ALLEVIATION URBAN GREEN SPACE Gender ...

  12. Search Results | Page 51 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2009-01-01

    Results 501 - 510 of 8491 ... ICT policy and regulatory frameworks : the status and challenges of SADC countries; AKPN Internet Governance 12 October 2009, Cape Town. Published date. January 1, 2009. Studies ...

  13. Search Results | Page 59 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2006-01-01

    Results 581 - 590 of 8491 ... Importance of backbone : usable knowledge for growing the sector; ICT policy and regulation research from LIRNEasia, New Delhi, 6 March 2006. Published date. January 1, 2006. Studies.

  14. Search Results | Page 2 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 11 - 19 of 19 ... Impact of Minimum Wage on the Labour Market in Central America : Comparative Analysis of Costa Rica, El Salvador and Nicaragua. The countries of Central America exhibit a great deal of heterogeneity in their economies. Project.

  15. Search Results | Page 58 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2009-01-01

    Results 571 - 580 of 8492 ... Tech goodies versus tech power : power analysis as a tool for ICTD research and project design; learning clinic from IT for Change. Published date. January 1, 2009. Studies.

  16. Search Results | Page 45 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 441 - 450 of 1804 ... Surveying Public Attitudes of Security Sector Reforms in the Arab World. One constant in the ebb and flow of the Arab Spring has been the increased influence of public opinion on public policy.

  17. Search Results | Page 9 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 81 - 90 of 282 ... Surveying Public Attitudes of Security Sector Reforms in the Arab World. One constant in the ebb and flow of the Arab Spring has been the increased influence of public opinion on public policy.

  18. Search Results | Page 30 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 291 - 300 of 8491 ... Improving Youth Employment Policies in Francophone Africa. Africa's persistent job crisis calls for more effective employment policies, including training programs and support for job searches. Project.

  19. Recent Results from the ATLAS UPC Program

    CERN Document Server

    Cole, Brian; The ATLAS collaboration

    2018-01-01

    Recent results from ATLAS measurements of ultra-peripheral Pb+Pb collisions are presented. Measurements include gamma+gamma -> dimuon, photo-nuclear production of di/multi-jets, and light-by-light scattering.

  20. Zbrowse: an interactive GWAS results browser

    Directory of Open Access Journals (Sweden)

    Greg R. Ziegler

    2015-05-01

    Full Text Available The growing number of genotyped populations, the advent of high-throughput phenotyping techniques and the development of GWAS analysis software has rapidly accelerated the number of GWAS experimental results. Candidate gene discovery from these results files is often tedious, involving many manual steps searching for genes in windows around a significant SNP. This problem rapidly becomes more complex when an analyst wishes to compare multiple GWAS studies for pleiotropic or environment specific effects. To this end, we have developed a fast and intuitive interactive browser for the viewing of GWAS results with a focus on an ability to compare results across multiple traits or experiments. The software can easily be run on a desktop computer with software that bioinformaticians are likely already familiar with. Additionally, the software can be hosted or embedded on a server for easy access by anyone with a modern web browser.

  1. How Are My Newborn's Screening Results Used?

    Science.gov (United States)

    ... condition or confirm a positive screening result. The Importance of Following Up Newborn screening is used to ... Instagram NEWSROOM NICHD News Videos OUTREACH Safe to Sleep® National Child & Maternal Health Education Program RELATED WEBSITES ...

  2. Search Results | Page 51 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2009-01-01

    Results 501 - 510 of 8491 ... ICT policy and regulatory frameworks : the status and challenges of SADC countries; AKPN Internet Governance 12 October 2009, Cape Town. Published date. January 1, 2009 ...

  3. Search Results | Page 8 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 71 - 80 of 8494 ... Energy efficiency optimum strategies for low carbon development in emerging economies: Comparative research. Sound energy efficiency policies play a critical role in fighting climate change. Project ...

  4. Search Results | Page 815 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    1998-01-01

    Results 8141 - 8150 of 8491 ... Cover Crops in West Africa: Contributing to Sustainable Agriculture. This book examines the potential for using cover crops to maintain and improve soil fertility in West Africa. Publication Date. January 1, 1998. Books ...

  5. Search Results | Page 845 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2009-05-19

    Results 8441 - 8450 of 8491 ... Mining in Africa: Regulation and Development. The continent of Africa is rich in minerals needed by Western economies. Yet the mining industry contributes very little to African development. Publication Date. May 19, 2009. Books.

  6. Search Results | Page 43 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 421 - 430 of 8494 ... Marie-Claude Bibeau, Minister for International Development and La Francophonie, announced an ambitious new approach to helping low- and middle-income countries: Canada's first feminist International Assistance Policy. Perspectives. Development SUSTAINABLE DEVELOPMENT HEALTH ...

  7. Search Results | IDRC - International Development Research Centre

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 1 - 10 of 8494 ... Precooked beans for food, nutrition, and income in Kenya and Uganda. Beans are an important food product that contribute to nutritional security, income generation, and employment in Kenya and Uganda.

  8. Search Results | Page 3 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 21 - 30 of 101 ... This project will endeavour to explain the political and economic factors influencing transitions in the Arab World in order to help policy actors steer the process toward stable democracy and sustainable, equitable economic growth. Project.

  9. Search Results | Page 46 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 451 - 460 of 8518 ... Curbing the sweet tooth of Bangladeshi children. If Parnali Chowdury's research is any indication, children in Bangladesh are not going to give up their sugary drinks easily. IDRC awardees ...

  10. Search Results | Page 781 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    1993-01-01

    Results 7801 - 7810 of 8491 ... Although we have witnessed a steady growth in the provision of information services in developing countries, a number of fundamental questions remain unanswered. Publication Date. January 1, 1993. Research in Action. Competition policy ...

  11. Search Results | Page 45 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2007-01-01

    Results 441 - 450 of 8491 ... Water security : what would an innovative research program take into account? : scope - scale - key issues - mobilizing program; IDRC workshop, Feb. 6-7. Published date. January 1, 2007. Studies.

  12. Search Results | Page 768 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 7671 - 7680 of 8491 ... A notable victory has been scored in the battle against tobacco in South Africa where smoking has been rated the second highest health concern. Research in Action. Natural Resources Mining REGIONAL DEVELOPMENT Pollution ...

  13. Search Results | Page 776 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Filter by project status. Closed (1075) Apply Closed filter · Active (646) Apply Active filter · Completed (83) Apply Completed filter. Showing 7751 - 7760 of 8492 results. Research in Action. Climate change ...

  14. Search Results | Page 31 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 301 - 310 of 1130 ... Promoting Locally Fortified Sunflower Oil Using E-Vouchers (CIFSRF Phase 2). Tanzania, along with most African countries, has been struggling to address persistent nutritional challenges, including vitamin A and iron deficiencies. Project.

  15. Search Results | Page 2 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 11 - 20 of 112 ... Promoting Locally Fortified Sunflower Oil Using E-Vouchers (CIFSRF Phase 2). Tanzania, along with most African countries, has been struggling to address persistent nutritional challenges, including vitamin A and iron deficiencies. Project.

  16. Search Results | Page 2 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 11 - 20 of 25 ... Promoting Locally Fortified Sunflower Oil Using E-Vouchers (CIFSRF Phase 2). Tanzania, along with most African countries, has been struggling to address persistent nutritional challenges, including vitamin A and iron deficiencies. Project ...

  17. Search Results | Page 24 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 231 - 240 of 1804 ... Promoting Locally Fortified Sunflower Oil Using E-Vouchers (CIFSRF Phase 2). Tanzania, along with most African countries, has been struggling to address persistent nutritional challenges, including vitamin A and iron deficiencies. Project ...

  18. Search Results | Page 2 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2016-06-01

    Results 11 - 20 of 22 ... Kenya: Meat that's creating a real “buzz”. Feeding chickens, hogs, cows, and fish with insects? This idea will really fly, from Kenya to Canada. Published date. June 1, 2016. Books.

  19. Search Results | Page 817 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    1999-01-01

    Results 8161 - 8170 of 8490 ... Effective governance is typified by transparency, accountability, credibility, and stability of the governing body, as well as by the cooperative partnership of public sector, private sector, and civil society. Publication Date. January 1, 1999. Books.

  20. Search Results | Page 841 | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Results 8401 - 8410 of 8492 ... International Partnerships for Sustainable Societies. As globalization, the communications revolution, global warming, and other forces reshape our world, we face opportunities and challenges with multiple social, economic, environmental, and cultural dimensions. Initiative ...