182 research outputs found

    Genetic polymorphism analysis and forensic application evaluation of 57 insertion/deletion polymorphisms from Yi ethnic group in Yunnan

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    As a new kind of diallelic genetic marker, insertion/deletion (InDel) polymorphisms have recently been used in forensic science. However, there are relatively few studies on the forensic evaluation of InDel genetic polymorphisms from different populations. The aim of the present work is to assess the genetic polymorphism and forensic applicability of 57 InDels from the Yi ethnic group and explore the genetic background of this group. A total sample of 122 unrelated individuals of Yi group from the Yunnan province were genotyped by the AGCU indel 60 Kit. Multiplex population genetic analyses on the same 57 InDels were carried out among the Yunnan Yi group and 29 reference populations. The average allele frequency of these loci in the Yi ethnic group was 0.485. Heterozygosity, polymorphism information content, and the power of discrimination were 0.477, 0.362, and 0.612, respectively. The combined power of discrimination and the combined power of exclusion reached to 0.99999999999999999669 and 0.999962965, respectively. The results showed that 57 InDels polymorphisms have high genetic polymorphisms in the Yi ethnic group. The 57 InDels could be used for forensic individual identification, paternity testing, and intercontinental population discrimination, with the potential for use in biogeographic ancestry inference.</p

    Research on the process of coal’s pores and fissures splitting during liquid nitrogen freeze-thaw action

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    A clean and effective unconventional fossil fuel is coalbed methane (CBM). The development of CBM is essential to reducing the lack of oil and gas resources, preventing coal mine gas mishaps, and safeguarding the atmosphere. After the coal samples prepared in this study were frozen and thawed by liquid nitrogen, the change rules of coal surface and internal pores were investigated by metallurgical microscopy and carbon dioxide adsorption. The results showed that: 1) The values of specific surface area, characteristic adsorption energy, and total SF microvolume of coal samples increased after freeze-thawing of liquid nitrogen, but the CO2 adsorption experiments showed that the pore width decreased, which indicated that the mechanism of freeze-thawing fracture effect coal by liquid nitrogen mainly increased the number of micropores in coal. 2) The water saturation of coal samples rose with the degree of surface cracking, but when the water content reached a specific level, the rise in surface porosity of coal reduced with the water saturation. 3) The increase in the number of cycles has a greater effect on the extent of expansion of pores on the coal surface than on the expansion of pores in the coal.</p

    Unexpectedly Lengthened N−H···Co Hydrogen Bonds?

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    Low-temperature crystal structures of QuinH+Co(CO)4-, 1 (QuinH+ = quinuclidinium), (DABCO)H+Co(CO)3P(p-tolyl)3-, 2, and (DABCO)H+Co(CO)3PPh2(p-tolyl)-, 3 (DABCO = 1,4-diazabicyclooctane), 2 and 3 as their acetonitrile solvates, demonstrate that these salts exhibit intermolecular N−H···Co hydrogen bonding between the cation and anion components. NMR and IR data demonstrate the persistence of these interactions in toluene solution. Such solution-state data, which examine solvated ion pairs, suggest little difference between these salts and the corresponding previously reported salts (DABCO)H+Co(CO)3L- (4, L = CO; 5, L = PPh3). However, in the solid state, the N−H···Co hydrogen bonds in 1−3 are some 0.1−0.15 Å longer than would be predicted from consideration of the structures of 4 and 5 and the aforementioned similarity to 4 and 5 in solution. In previous reports we have shown that major steric or electronic changes to the anion or cation have resulted in substantial changes (0.15−0.3 Å) in the N···Co [H···Co] separation for N−H···Co hydrogen bonds in related R3NH+Co(CO)3L- (L = CO, PR3) salts. In this report, we present examples in which small changes are made to the anion or cation remote from the N−H···Co hydrogen bond. In the solid state, the effect of these small changes on this hydrogen bond is subsumed by the effect of changes in the supramolecular structure. This clearly indicates the sensitivity of the geometry of these hydrogen bonds to the overall balance of intermolecular interactions in the solid state and as such is pertinent to current interest in weak (intermolecular) interactions for which characterization by X-ray crystallography is important

    Polymorphism of ((Tosylimino)iodo)-<i>o</i>-toluene:  Two New Modes of Polymeric Association for ArINTs

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    Polymorphism of ((Tosylimino)iodo)-o-toluene:  Two New Modes of Polymeric Association for ArINT

    sj-pdf-1-imr-10.1177_03000605231208923 - Supplemental material for Case report of severe pneumothorax due to lung cancer treated with anlotinib

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    Supplemental material, sj-pdf-1-imr-10.1177_03000605231208923 for Case report of severe pneumothorax due to lung cancer treated with anlotinib by Haowei Lu, Feiyang Li, Yong Yang and Dong Zhao in Journal of International Medical Research</p

    Fig 5 -

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    (a) Transmittance varying with the frequencies of incident light wave for the generation number N = 2. (b-d) Electric field distributions of the 13-th, 14-th and 15-th optical fractal state, respectively. The incident angle of light is θi = 0°.</p

    Light path diagram of optical wave transmitting in the Cantor dielectric multilayers.

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    Light path diagram of optical wave transmitting in the Cantor dielectric multilayers.</p

    Prevalence of carotid increased IMT and plaque stratified by within-visit maximum absolute difference of systolic blood pressure in hypertensive patients.

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    <p>Prevalence of carotid increased IMT and plaque stratified by within-visit maximum absolute difference of systolic blood pressure in hypertensive patients.</p
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