757 research outputs found
JuXinglong/WFLOP_Python: Xinglong Ju, and Victoria C. P. Chen. "A MARS Python version using truncate linear function.", 2019.
No full textXinglong Ju, and Victoria C. P. Chen. "A MARS Python version using truncate linear function.", 2019
The genome landscape of the Xinglong buffalo
No full textAbstract Background Xinglong buffalo, as an indigenous breed in Hainan province of China, possesses characteristics such as high humidity tolerance, disease resistance and high reproductive capacity. Combined with whole genome sequencing technology, comprehensive investigation can be undertaken to elucidate the genomic characteristics, functions and genetic variation of Xinglong buffalo population. Results Xinglong buffalo has the highest genetic diversity, lowest runs of homozygosity average length, and fasted decay of linkage disequilibrium in our study population. Phylogenetic tree results revealed that Xinglong buffalo was gathered together with Fuzhong buffalo firstly. The population genetic structure analysis indicates that at K = 3, the Xinglong buffalo for the first time showed a distinct ancestral origin from other water buffalo. Furthermore, compared to different populations, candidate genes displaying significantly distinct patterns of single nucleotide polymorphisms (SNPs) (e.g., RYR2, COX15, PCDH9, DTWD2, FCRL5) distribution have been identified in the Xinglong buffalo. Conclusions Based on the whole genome sequencing data, this study identified a substantial number of SNPs and assessed the genetic diversity and selection signatures within the Xinglong buffalo population. These results contribute to understanding the genomic characteristics of Xinglong buffalo and their genetic evolutionary status. However, the practical significance of these signatures for genetic enhancement still requires confirmation through additional samples and further experimental validation
Development of a 5K Liquid-Phase Genome-Wide Breeding Chip for Xinglong Buffalo
No full textThe Xinglong buffalo is a local swamp buffalo breed adapted to tropical regions in China. To facilitate the protection and utilization of valuable genetic resources, we first developed the breed-specific single nucleotide polymorphism (SNP) liquid-phase chip based on genotyping-by-target-sequencing (GBTS) technology. Whole-genome resequencing data from 143 buffaloes, resulting in 34,757,694 SNPs, were used to identify 1208 breed-specific and 2889 background sites. This chip also incorporates 965 functional SNP sites derived from literature, including SNPs significantly associated with immunity, reproduction, growth, and production. A total of 5062 SNP sites were successfully identified for the development of a 5K liquid-phase genome-wide breeding chip for the Xinglong buffalo. The validation of the chip using 93 samples showed a high detection rate with good repeatability and consistency. In addition, the chip exhibits strong capabilities in clustering and kinship analysis. Results of kinship analysis underscored the importance of a breed-specific chip for the Xinglong buffalo. These results highlight the advantages of a low-density, cost-effective, and breed-specific SNP chip for accurate genotyping. This chip will support future endeavors in molecular breeding, conservation, and genetic evaluation of Xinglong buffalo, thereby facilitating the sustainable utilization of this valuable indigenous germplasm resource
Numerical study on regime shifts in an urban subtropical shallow lake: Xinglong Lake, China
No full textAquatic ecosystem degradation is a considerable challenge of global interest. Although substantial efforts have been accomplished to restore phytoplankton-dominated shallow lakes to a clear state with high coverage of submerged macrophytes, the phenomenon, driving mechanism, and threshold range of such nonlinear regime shifts remain unclear. Here, we constructed an aquatic ecological model based on PCLake, simulated and predicted the aquatic ecological changes before and after treatments of Xinglong Lake, a subtropical artificial shallow lake that had been completed ecological restoration in Chengdu, China. The model included the future prediction of TN, TP, Chl-a, and aquatic vegetation biomass, as well as the threshold of regime shifts using bifurcation analysis. We also quantified the impact of some common management measures (point and non-point source pollution control, water level regulation) on the stability of the lake's aquatic ecosystem. The results showed that the thresholds of Xinglong Lake from a clear state to a turbid state were 1.405 mg/m2/day and vice versa 0.68 mg/m2/day, indicating its initial turbidity and transitional state after treatment. After treatment, phosphorus loads still exceeded the threshold for a clear-water state, while the non-point source pollution of Xinglong Lake accounted for more than 80%. To prevent the aquatic ecosystem from collapsing in the future, it is necessary to combine upstream water quality improvement, runoff and air pollution control to reduce total pollution by 60%. Reasonable water level regulation, such as adjusting the water level downwards by 0.5 m in spring, is beneficial in maintaining the health and stability of aquatic ecosystems. The present study can be used to evaluate the effectiveness of the management measures of Xinglong Lake as well as to provide scientific support for the management of shallow lakes
Effect of solvent swelling on liquefaction of Xinglong coal at less severe conditions
No full textXinglong coal, a sub-bituminous coal, was swollen with pyridine or tetrahydrofuran followed by liquefaction in a 70-ml autoclave apparatus. The experiments were carried out to investigate the effects of temperature, solvent, atmosphere and catalyst on the liquefaction of solvent-swollen coal and untreated coal. The results indicate that the conversion of coal could be effectively improved in the temperature range of 320-420 °C by swelling pretreatment. Molecular hydrogen shows no contribution to coal conversion during the liquefaction of pyridine-swollen coal in the absence of a catalyst and in the presence of hydrogen donor solvent such as tetralin. With the addition of a catalyst, the liquefaction conversion of pyridine-swollen coal is higher in H2 than that in N2. The swelling pretreatment of coal can improve the liquefaction yields, weaken the dependence of the process on the presence of molecular hydrogen and the hydrogen donation ability of the solvent, and increase the conversion of coal liquefaction.</p
Balta barbellata Che and Chen, sp. nov.
No full textBalta barbellata Che and Chen sp. nov. Figures 24–34 Description. Pronotum length×width 3 × 4.5 mm; tegmen 13.5 mm; overall length including tegmen 15.5 mm. Body brown. Vertex and face dark brown. Pronotum brown with dark brown macula, broad lateral areas semihyaline (Fig. 25). Venter and legs brown suffused with dark brown. Vertex with interocular space slightly less than distance between antennal sockets (Fig. 24). Third and fourth maxillary palpomeres about same length, both distinctly longer than the fifth. Pronotum with two small spots on disk. Tegmen with discoidal veins longitudinal and slightly oblique. Hind wing with costal veins clubbed and thickened; medial vein simple, without branches; cubital vein with 5 complete branches and some branches bifurcated at apex, triangular apical area reduced and small (Fig. 26). Front femur of Type B 3 (Fig. 27), tarsal claws strongly asymmetrical and unspecialized (Fig. 28). Male genitalia with supra-anal plate in ventral view short and shallowly triangular, with mediodistal region rounded-convex, middle of hind margin curved (Fig. 29); right and left paraprocts nearly symmetrical, plate simple with apices rounded (Fig. 29). Subgenital plate in dorsal view nearly oval, lateral margins strongly convex, hind margin deeply and concavely excavated with one large, projecting, hyaline medial lobe; styli small, fingerlike, arising on each side of excavation and directed medially (Fig. 30). Left phallomere enlarged, sclerotized plates irregular (Fig. 31). Median phallomere long, sticklike and slightly curved with base blunt and apex acuminate (Fig. 32); one associated median phallomere appendage present and below median phallomere, which is bifurcated near middle and with base densely covered with short setae; the branch beneath arched and apex densely scattered with short setae, the other below bent downward in middle and apex also densely scattered with short setae (Fig. 33). Hook-like phallomere with sclerotized portion very small, slender and with V-shaped incision (Fig. 34). Material examined. Holotype m?, China, Hainan, Xinglong, 29 June 1983, Ke Minghui coll. Paratype: 1 m?, China, Hainan, Jianfeng Mountain, 18 November 1982, Huang Guifang coll. Remarks. Although this species has a type B 3 front femur, we place it in Balta on the basis of the apical triangle of hind wing, as well as wing venation, tarsal claws, and subgenital plate. This species is similar to B. hwangorum Bey-Bienko, 1958, the type of which was collected in Yunnan, China. Balta barbellata is distinguished from B. hwangorum by the following characteristics: 1) front femur type B 3 (type C 2 in B. hwangorum); 2) hind margin of subgenital plate with clear projection in which the styli are located, middle of hind margin with strongly V-shaped incision (hind margin without clear-cut projection, styli located in shallow concavities, middle of hind margin without incision in B. hwangorum). Etymology. The specific name “ barbellatus,” derived from Latin, refers to the presence of short setae on the base, apex and middle of the arched appendage of the median phallomere.Published as part of Che, Yanli, Chen, Li & Wang, Zongqing, 2010, Six new species of the genus Balta Tepper (Blattaria, Pseudophyllodrominae) from China, pp. 55-67 in Zootaxa 2609 on page 60, DOI: 10.5281/zenodo.19776
The Xinglong 2.16-m Telescope: Current Instruments and Scientific Projects
No full textThe Xinglong 2.16-m reflector is the first 2-m class astronomical telescope in China. It was jointly designed and built by the Nanjing Astronomical Instruments Factory (NAIF), Beijing Astronomical Observatory (now National Astronomical Observatories, Chinese Academy of Sciences, NAOC), and Institute of Automation, Chinese Academy of Sciences in 1989. It is a Ritchey-Chretien (R-C) reflector on an English equatorial mount and the effective aperture is 2.16 m. It had been the largest optical telescope in China for similar to 18 years until the Guoshoujing Telescope (also called Large Sky Area Multi-Object Fiber Spectroscopic Telescope, LAMOST) and the Lijiang 2.4-m telescope were built. At present, there are three main instruments on the Cassegrain focus available: the Beijing Faint Object Spectrograph and Camera (BFOSC) for direct imaging and low-resolution (R similar to 500-2000) spectroscopy, the spectrograph made by Optomechanics Research Inc. (OMR) for low-resolution spectroscopy (the spectral resolutions are similar to those of BFOSC) and the fiber-fed High Resolution Spectrograph (HRS; R similar to 30,000-65,000). The telescope is widely open to astronomers all over China as well as international astronomical observers. Each year there are more than 40 ongoing observing projects, including 6-8 key projects. Recently, some new techniques and instruments (e.g., astro-frequency comb calibration system, polarimeter, and adaptive optics) have been or will be tested on the telescope to extend its observing abilities.National Natural Science Foundation of China (NFSC) [11003021, 11373003, 11273027, 11303042]; National Key Basic Research Program of China (973 Program) [2015CB857002]; Young Researcher Grant of the National Astronomical Observatories, Chinese Academy of SciencesSCI(E)[email protected]
JCB903697 Supplemental Material - Supplemental material for Selective intra-arterial brain cooling improves long-term outcomes in a non-human primate model of embolic stroke: Efficacy depending on reperfusion status
No full textSupplemental material, JCB903697 Supplemental Material for Selective intra-arterial brain cooling improves long-term outcomes in a non-human primate model of embolic stroke: Efficacy depending on reperfusion status by Di Wu, Jian Chen, Mohammed Hussain, Longfei Wu, Jingfei Shi, Chuanjie Wu, Yanhui Ma, Mo Zhang, Qi Yang, Yongjuan Fu, Yunxia Duan, Cui Ma, Feng Yan, Zixin Zhu, Xiaoduo He, Tianqi Yao, Ming Song, Xinglong Zhi, Chunxiu Wang, Lipeng Cai, Chuanhui Li, Shengli Li, Yongbiao Zhang, Yuchuan Ding and Xunming Ji in Journal of Cerebral Blood Flow & Metabolism</p
Leucophenga rhombura Huang, Su & Chen, 2017, sp. nov.
No full text<i>Leucophenga rhombura</i> sp. nov. <p>(Figs. 2 P, 6A, 6B, 9I, 9J, 24)</p> <p> <b>Diagnosis.</b> This species is mostly similar to <i>L</i>. <i>rugatifolia</i> <b>sp. nov.</b> in having the thorax mostly dark colored (Fig. 6 A–D), the wing fuscous along R1 only (Fig. 2 P, Q), and the shape of paramere (Figs. 24, 25 C), but can be distinguished from the latter by the hypandrium lacking any sensillum (Fig. 24 B), and the aedeagus slender, narrow on posteroventral 1/3 and apically, slightly rhombic distally in lateral view, with 1 sensillum distally (Fig. 24 D); see below that species.</p> <p> <b>Description.</b> Ocellar triangle dark brown, with ca. 2–3 setae above ocellar setae. Frons brownish yellow, brown laterally. Pedicel and first flagellomere brownish yellow. Clypeus brown. Palpus yellow. Mesonotum entirely dark brown to black in male (Fig. 6 A), brownish yellow, with three brown, longitudinal stripes medially and laterally in female. Postpronotal lobe brown in male (Fig. 6 B), brownish yellow in female. Acrostichal setulae in ca. 10–12 irregular rows (Fig. 6 A). Scutellum entirely dark brown to black (Fig. 6 A). Pleura, katepisternum and meron mostly dark brown in male (Fig. 6 B), mostly brown in female. Wing (Fig. 2 P): Costal vein between R2+3 and R4+5 distally with ca. 5–6 peg-like spinules on ventral surface. Abdominal tergites dark brown, 2nd tergite with two pairs of yellow patches submedially and laterally, 3rd tergite with a pair of yellow patches submedially, 4th tergite with a pair of yellow patches subanteromedially in male (Fig. 9 I), 3rd tergite with a pair of yellow patches subanteromedially in female (Fig. 9 J). Male terminalia: Epandrium with ca. 4 setae near posterior margin per side (Fig. 24 A). Surstylus rounded apically (Fig. 24 A). Paramere with a wrinkle remarkable subdorsally and ca. 9 sensilla aligned above (Fig. 24 C).</p> <p> <b>Measurements.</b> BL = 3.00 mm in holotype (range in 4♂ and 5♀ paratypes: 2.73–2.93 mm in ♂, 2.47–2.90 mm in ♀), THL = 1.47 mm (1.37–1.43 mm in ♂, 1.20–1.33 mm in ♀), WL = 2.60 mm (2.20–2.47 mm in ♂, 2.13–2.27 mm in ♀), WW = 1.23 mm (1.13–1.23 mm in ♂, 1.03–1.13 mm in ♀), arb = 6/3 (5–9/3), avd = 1.08 (0.83–1.00), adf = 1.50 (1.63–2.14), flw = 1.63 (1.43–1.86), FW/HW = 0.35 (0.33–0.42), ch/o = 0.05 (0.04–0.06), prorb = 0.64 (0.58–0.68), rcorb = 0.64 (0.53–0.73), vb = 0.38 (0.33–0.43), dcl = damaged (0.28–0.57), presctl = 0.51 (0.40–0.50), sctl = 1.22 (1.25–1.43), sterno = 0.85 (0.76–0.86), orbito = 2.50 (2.00–2.75), dcp = 0.26 (0.27–0.33), sctlp = 1.23 (1.07–1.25), C = 2.54 (2.21–2.47), 4c = 1.09 (1.13–1.41), 4v = 2.15 (2.18–2.44), 5x = 1.38 (1.44–1.86), ac = 2.06 (1.67–2.18), M = 0.65 (0.71–0.93), C3F = 0.81 (0.76–0.85).</p> <p> <b>Type specimens.</b> Holotype ♂ (SCAU, No. 129048), CHINA: Yulong, Lijiang, Yunnan, 27°06'N, 100°10'E, 3000m, 5.ix.2012, ex tussock, Q Zhang. Paratypes: CHINA: 3♂, 3♀ (SCAU, Nos 129029–34), Jiulongshan, Lishui, Zhejiang, 28°22'N, 118°53'E, 1610m, 6.vii.2013, ex tussocks, K Liu; 1♂ (SCAU, No. 129035), Wuyishan, on the boundary between Jiangxi and Fujian, 27˚43'N, 117˚57'E, 1900m, 14.vi.2004, ex tree trunk, HW Chen; 2♂, 2♀ (SCAU, Nos 129036–39), Nanling, Shaoguan, Guangdong, 780m, 6.x.2004, ex tussocks, HW Chen; 1♂, 1♀ (SCAU, Nos 129040, 41), Simianshan, Jiangjin, Chongqing, 1130m, 10.vii.2014, ex tussocks, L Zhou; 1♂, 1♀ (SCAU, Nos 129042, 43), Xianheping, Xinglong, Guizhou, 1630m, 11.vii.2014, ex tree trunk, QS Gao; 1♂ (SCAU, No. 129047), Jizushan, Dali, Yunnan, 26°01'N, 100°21'E, 1900m, 23.vii.2006, ex tree trunk, T Li; 4♀ (SCAU, Nos 129049–52), Yixiang, Puer, Yunnan, 1400m, 2.x.2011, ex tussocks, JJ Gao; 2♂ (SCAU, Nos 129045, 46), Muyiji Park, Ximeng, Yunnan, 1100m, 4.iv.2011, ex tussocks, YR Su; 1♂ (SCAU, No. 129044), Hesong, Menghai, Yunnan, 1750m, 2.iv.2011, ex tussock, YR Su; 2♀ (SCAU, Nos 129053, 54), Tongmai, Bomi, Xizang, 2000m, 11.x.2010, ex tussocks, L Wang.</p> <p> <b>Distribution.</b> China (Zhejiang, Jiangxi, Fujian, Guangdong, Chongqing, Guizhou, Yunnan, Xizang). <b>Etymology.</b> From the Greek word “ <i>rhombos</i> ” (= rhombic), referring to the aedeagus distally rhombic in lateral view.</p>Published as part of <i>Huang, Jia, Su, Yirui & Chen, Hongwei, 2017, The genus Leucophenga (Diptera, Drosophilidae), part VII: the subpollinosa species group from China, with morphological and molecular evidence, pp. 201-245 in Zootaxa 4247 (3)</i> on pages 238-239, DOI: 10.11646/zootaxa.4247.3.1, <a href="http://zenodo.org/record/438516">http://zenodo.org/record/438516</a>
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