470 research outputs found
Institutional investor network, analyst public information and extreme risks
This paper builds the institutional investor network on the basis
of the common stock holdings of mutual funds with large positions. Institutional investors share and interact private information
through social networks. Seen from separating private and public
information, the effects of private information sharing in institutional investor networks and the effects of public information diffusion on extreme risks are examined, respectively. Then, the
integrated impact of institutional investor information sharing
with analyst on extreme risks is analysed. Empirical research has
found that analyst public information spread will decrease the
probability of extreme risks. The information sharing in social network of institutional investors will restrain stock market extreme
risks. The closer network of institutional investors lower the influence of analyst public information on extreme risks. In addition,
we also found that stock liquidity has weakened the inhibition of
fund network information sharing on extreme risks. The research
results provide reference for the authorities to regulate market
participant behaviours so as to avoid risks
Designing Software to Locate Differences in the Shrimp Genome
In order to determine where important differences in the genomic sequence of Pacific White Shrimp occur, many copies each of multiple regions of DNA sequence are needed. Then similar sequences can be aligned so that almost all of the bases are identical between the sequences and differences are easy to notice. One of the major issues with predicting single base position differences (SNPs) in this manner is that DNA sequencing techniques are not 100% consistent in most cases. Consequently, it needs to be determined whether a particular base is different because the true genetic sequence is variable at that position or because the sequencing process resulted in the base position being incorrectly called. SNPidentifier is a newly developed computer program that takes into account the unreliability of sequence data and tries to use only the more reliable sequences to predict where true SNPs are located. The goal of locating SNPs in Pacific White Shrimp is to identify base positions that can possibly be used in the future as molecular markers for traits of interest to shrimp breeders
2,4-Dichloro-6-nitrobenzoic acid
The title compound, C7H3Cl2NO4, was prepared by the reaction of 2,4-dichloro-6-nitrotoluene with 20% HNO3 solution at 430 K. The carboxyl and nitro groups are twisted by 82.82 (12) and 11.9 (2)°, respectively, with respect to the benzene ring. The crystal structure is stabilized by O—H⋯O hydrogen bonding between carboxyl groups and weak C—H⋯O hydrogen bonding between the nitro group and the benzene ring of an adjacent molecule
A SNP Genetic Map for Pacific White Shrimp (Litopenaeus vannamei)
Pacific white shrimp are of particular economic importance to the global shrimp aquaculture industry. We utilized the limited public sequence information, mainly genetic markers called single nucleotide polymorphisms (SNPs) and expressed sequence tags, to discover markers for the construction of the first SNP genetic map for Pacific white shrimp. In total, 1344 putative SNPs were discovered, and out of 825 SNPs genotyped, 418 SNP markers from 347 contigs were mapped onto 45 sex-averaged linkage groups, with approximate coverage of 2071 and 2130 cM for the female and male maps, respectively. Comparative mapping to model organisms, Daphnia pulex and Drosophila melanogaster, revealed extensive rearrangement of genome architecture for L. vannamei, and that L. vannamei was more related to Daphnia pulex. This SNP genetic map lays the foundation for future shrimp genomics studies, especially the identification of genetic markers or regions for economically important traits
Topology and phase transition for EPYM AdS black hole in thermal potential
As we all know the local topological properties of thermodynamical systems
can be expressed by the winding numbers as the defects. The topological number
that is the sum of all winding numbers can be used to classify the global
topological nature of thermodynamical systems. In this paper, we construct a
kind of thermal potential and then put the Einstein-power-Yang-Mills AdS black
hole in it. Through the analysis of the geometric characteristics of the
thermal potential based on the complex analysis we find the topological number
is an invariant that is same as shown in the way of the Duan's -mapping
topological current [Sci. Sin. 9, 1072 (1979)]. Furthermore, we adopt the
Kramer's escape rate method to investigate the intensity of the first-order
phase transition
Investigation of effects of three candidate genes on leg action and fat deposition traits in pigs
Data from 188 sows were used in the current study to examine the effects of high mobility group AT-hook1 (HMGA1), transcription factor 7-like-2 (TCF7L2) and insulin-like growth factor binding protein 3 (IGFBP3) genes on leg action and fat deposition traits, and further to explore the possible relationships between these genes on both traits. The candidate genes used in the study are known for their roles in fat deposition and growth. Overall leg action was scored on a scale of 1 (good movement) to 9 (leg weakness). Fatness traits included 10th rib backfat (BF10), adjusted 10th rib backfat to 125 kg (adjBF10) and last rib backfat (last BF), measured by ultrasonic imaging approach. The association analyses between single nucleotide polymorphisms (SNPs) and traits were performed using PROC MIXED procedures of SAS. The results showed that the associations between HMGA1, TCF7L2 and IGFBP3 genotypes with fat deposition traits were mostly suggestive in this limited data set. Leg action was also suggestively associated with IGFBP3 gene effects but was not associated with HMGA1 and TCF7L2 genes. Thus, IGFBP3 AA homozygote individuals tended to have had better movements (5.40), and were fatter when compared to GG homozygotes (5.84). The results from this study suggest a possible association between the IGFBP3 gene effects on both leg action and fatness. Therefore, further studies must be carried out in several populations, and using larger data to demonstrate these results conclusively
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