264 research outputs found
sj-pdf-1-imr-10.1177_03000605231204479 - Supplemental material for HHV-6B- and HHV-7-associated choroiditis secondary to acute myelogenous leukemia: a case report
No full textSupplemental material, sj-pdf-1-imr-10.1177_03000605231204479 for HHV-6B- and HHV-7-associated choroiditis secondary to acute myelogenous leukemia: a case report by Jing Xu, Linjiang Chen, Tao Cen, Yuanping Zeng and Qiong Liu in Journal of International Medical Research</p
Neocarpia bidentata Zhang & Chen 2013
No full text<i>Neocarpia bidentata</i> Zhang & Chen, 2013 <p> <i>Neocarpia bidentata</i> Zhang & Chen, 2013b: 43.</p> <p>(Figs 51‒53)</p> <p> <b>Material examined.</b> 1♂, CHINA: Linjiang (28°19’N, 106°12’E), Xishui County, Guizhou Province, 1 June 2006, leg. Xiang-Sheng Chen (holotype); 3♀♀, same data (paratypes); 1♂, Dayi (25°10’N, 106°06’E), Wangmo County, Guizhou Province, 24 September 1997, leg. Xiang-Sheng Chen (paratype).</p> <p> <b>Distribution.</b> China (Guizhou).</p> <p> <b>Host plant.</b> Bamboo (Poaceae, Bambuseae).</p> <p> <b>Remarks.</b> The male is described by Zhang and Chen, 2013b and the female by Zhi <i>et al</i>., 2017. This species can be distinguished from other species of the genus by the following characters: forewing with an oblique brown stripe arising from base of costal cell to middle of Y-vein and a V-shaped brown broad stripe on apical half, with 10 apical and 6 subapical cells; metatibiotarsal formula: 5/7/8; ventral margin of periandrium of aedeagus with a small triangular spine at basal one third, both right and left sides of periandrium apically with a spinous process; dorsal margin of periandrium with a shovel-shaped process; endosoma narrowing to apex and forming a longer spine, which with two denticulations on base.</p>Published as part of <i>Chen, Xiang-Sheng & Zhi, Yan, 2023, Taxonomic study of the Eucarpiini (Hemiptera: Fulgoromorpha: Cixiidae) from China, pp. 1-100 in Zootaxa 5347 (1)</i> on page 72, DOI: 10.11646/zootaxa.5347.1.1, <a href="http://zenodo.org/record/8390836">http://zenodo.org/record/8390836</a>
Cobitis gracilis Chen & Chen 2016, sp. nov.
No full textCobitis gracilis sp. nov. (Figs 3–12) * Retrieved from GenBank. Holotype. ♂, HU 1600062, 74.4 mm TL, 64.2 mm SL, the Yalu River, Linjiang (41°81′N, 126°92′E), Jilin, China, October 2015, collected from the Linjiang farm product market by Yongxia Chen. Paratypes. HU 1505136, 1600037, 1600056, 3♀, 75.2–88.4 mm TL, 65.0– 78.4 mm SL, same data as holotype; HU 1506359, 1506347, 1506354, 3♀, 81.5–86.4 mm TL, 71.0– 74.3 mm SL, the Ussuri River, Raohe (46°80′N, 134°02′E), Heilongjiang, China, October 2015, collected from the Raohe farm product market by Yongxia Chen. Diagnosis. The new species is most similar to C. granoei and C. melanoleuca, but distinguished from C. granoei and C. melanoleuca in the upper jet black spot at the base of caudal fin inconspicuous or absent (Figs 3–4, 9–10) (vs. jet black spot conspicuous in C. melanoleuca (Figs 19–20) and C. granoei (Figs 13–14)); suborbital spine is slender and straight, with long processus latero-caudalis, less than one-second of the processus medio-caudalis (Fig. 7) (vs. suborbital spine thick and straight with short processus latero-caudalis in C. melanoleuca (Fig. 23); suborbital spine slender and curved with long processus latero-caudalis in C. granoei (Fig. 17)); males with a small meniscus lamina circularis at the base of the first branched pectoral fin ray (Fig. 5) (vs. an knife lamina circularis in C. melanoleuca (Fig. 21); a larger semilunar lamina circularis in C. granoei (Fig. 15)); 15–20 blotches on L 5 (vs. 10–16 blotches on L 5 in C. melanoleuca; 11–16 large blotches on L 5 in C. granoei). Description. General appearance and morphometic data of holotype and paratypes are given in Figs 3–12 and Table 2, respectively. D. III–7; A. III–5; V. I–6; P. I–7–8; C. IV–14–16–IV. Body slender, depth 8.7 in SL in males and 8.9–11.1 (mean 9.8) in females. Head small, with a length of 5.3 in SL in males and 5.2–5.6 (mean 5.5) in females. Snout rounded. Preorbital part of head shorter than postorbital part of head. Mouth small, with three pairs of short barbels. Length of maxillo-mandibular barbels shorter than diameter of eye. Maxillary barbels not reach under anterior border of eye. Mental lobes undeveloped, two superficial longitudinal lobes short, and lower tip bluntly rounded (Fig. 6). Suborbital spine slender and straight, with long processus latero-caudalis, less than one-second of processus medio-caudalis (Fig. 7). Subdorsal scales small and oval, with a large focal area, 19–22 radial grooves, and 3–5 supplementary ones (Fig. 8). Dorsal fin inserted midway between posterior nasal and base of caudal fin. Length of predorsal 1.9 in SL in males and 1.8–1.9 (mean 1.8) in females. In males, pectoral fins longer than those in females; first branched pectoral fin ray longest. Length of first branched pectoral fin ray 7.1 in SL. In females, second branched pectoral fin ray longest with length of second branched pectoral fin ray 8.6–11.0 (mean 9.8) in SL. Ventral fins approximately at same level as dorsal fin. Anal fin located in far behind dorsal extremity and not reach caudal fin. Anal orifice close to anal fin. Caudal fin emarginated tip. Pigmentation pattern. Body color whitish with a variable dark brown pigmentation pattern organized in L 1 –L 5 (Figs 3–4, 9–12). Color patterns characteristic of sexual dimorphism not obvious. L 1 consisted of a row of 7–9 rectangular blotches before dorsal fin that became less regular behind head; 2 on dorsal fin and 7–10 behind dorsal fin. Gap of rectangular blotches narrower than width of blotches. L 2 comprised a line of irregularly small dots that not intermingle with gap of L 1, and diminished towards end of caudal fin. L 3 comprised a row of horizontally elongated or rounded spots and that decreased beyond anal fin. L 4 spotted with one line of dots and that diminished towards end of caudal fin. L 5 comprised 15–20 oval blotches that together formed an irregular small blotch near head and caudal fin. At base of caudal fin, one inconspicuous jet-black spot found in upper region. In a few individuals, spot absent. Five or six striations on dorsal and caudal fins. Head sprinkled with many black spots on dorsal side, and a black stripe extended from occiput through eye to insertion of rostral barbels. Sexual dimorphism. Males smaller than females with proportionally longer pectoral, ventral, and anal fins. In males, first branched pectoral-fin ray thickened and elongated, with a small meniscus lamina circularis at base (Fig. 5). In females, second branched pectoral fin ray elongated. Distribution. This new species occurs in the Yalu and Heilongjiang rivers in Jilin and Heilongjiang Provinces in northeast of China (Figs 1–2). Etymology. The specific name derives from the Latin gracilis, meaning slender, in reference to the slender body.Published as part of Chen, Yongxia & Chen, Yifeng, 2016, A new species of the genus Cobitis (Cypriniformes: Cobitidae) from the Northeast China, pp. 379-391 in Zoological Systematics 41 (4) on pages 381-385, DOI: 10.11865/zs.201643, http://zenodo.org/record/461761
Optimal corporate investment and financing policies with time-varying investment opportunities
No full textThesis (S.M.)--Massachusetts Institute of Technology, Computation for Design and Optimization Program, 2011.Cataloged from PDF version of thesis.Includes bibliographical references (p. 65-68).Bolton, Chen and Wang (2009) propose a model (the BCW model) of dynamic corporate investment, financing, and risk management for a financially constrained firm. In the BCW model, corporate risk management is a combination of internal liquidity management, financial hedging, investment, and payout decisions. However, Bolton et al. (2009) assume that the firm's investment opportunities are constant over time, which is unrealistic in many situations. I extend the analytical tractable dynamic framework of Bolton et al. (2009) for firms facing stochastic investment opportunities. My extended model can help financially constrained firms to optimally choose external financing (equity or credit line), internal cash accumulation, corporate investment, risk management and payout policies in an environment subjective to time-varying productivity shocks. The differences of policies from the BCW model and my extended model, as well as the optimal and non-optimal policies are also compared.by Linjiang Cai.S.M
Accelerating computational discovery of porous solids through improved navigation of energy structure function maps
Get PDFWhile energy-structure-function (ESF) maps are a powerful new tool for in silico materials design, the cost of acquiring an ESF map for many properties is too high for routine integration into high-throughput virtual screening workflows. Here, we propose the next evolution of the ESF map. This uses parallel Bayesian optimization to selectively acquire energy and property data, generating the same levels of insight at a fraction of the computational cost. We use this approach to obtain a two orders of magnitude speedup on an ESF study that focused on the discovery of molecular crystals for methane capture, saving more than 500,000 central processing unit hours from the original protocol. By accelerating the acquisition of insight from ESF maps, we pave the way for the use of these maps in automated ultrahigh-throughput screening pipelines by greatly reducing the opportunity risk associated with the choice of system to calculate.</p
Catonidia daozhenensis Chen & He, sp. nov.
No full textCatonidia daozhenensis Chen & He, sp. nov. (Figs 21 –30, 37– 39) Description. Body length (from apex of vertex to tip of forewing): 3 7.55–8.10 mm, ♀ 8.10–8.40 mm; forewing length 3 6.60 –7.00 mm, ♀ 7.15–7.25 mm. Coloration. General colour pale yellowish brown to pale brown (Figs 37–39). Vertex, frons pale brown, clypeus pale yellowish brown. Rostrum pale brown. Genae brown. Eyes blackish brown, ocelli reddish brown. Antennae pale brown. Pronotum yellowish brown, areas behind eyes brown to fuscous. Mesonotum yellowish brown. Forewing milk-white with several small brown markings, apex brown. Hindwing nearly hyaline, venations pale brown. Legs brown. Abdomen yellowish brown to brown. Head and thorax. Head including eyes narrower than pronotum (0.62: 1). Vertex wider than long in middle line (2.52: 1). Frons longer in middle line than widest part (2.00: 1), width at base narrower than width at apex (0.84: 1). Pronotum longer in middle line than vertex (1.39: 1). Mesonotum longer in middle line than pronotum (5.16: 1), and longer than pronotum and vertex together (3.00: 1). Forewing longer than widest part (2.05: 1). Spinal formula of hind leg 7–8 – 8. Male genitalia. Anal segment longer than widest part (1.78: 1) in dorsal view, apical margin broadly rounded (Fig. 25). Pygofer in profile dorsal margin distinctly shorter than ventral margin, with dorsal third of posterior margin strongly angulated caudad, ventral third with a small lobe (Fig. 26), in ventral view medioventral process broad at base, lateral margins slightly converging apically, apex protruded angularly (Fig. 28). Genital style longer than width (2.13: 1), apical margin broadly rounded, a stout, twisty process raising from apical third of dorsal margin, inner side of base with a short finger-like process (Fig. 29). Phallobase tubular, in lateral view relatively narrow at base, dorsal lobe vestigial, lateral lobes converse beaked, broad at middle way, then narrowing apically, curving upward, acute at apex; ventral lobe slender, narrowing apically, acute at apex, with base strongly constricted, stalk-like (Fig. 30). Genital lamina sclerotized, in lateral view beanpod shaped. Phallobasal conjunctival processes lateral view subparallel-sided, rounded at apex, each with an ear-like lobe laterally near apex (Fig. 30). Type material. Holotype: 1 3, Xiannvdong, Dashahe Natural Reserve, Daozhen County, Guizhou Province, 600–700m, 25–27 May 2004, X.-S. Chen; paratypes: 3 3, 1 ♀, same data as holotype; 1 3, Dashahe Natural Reserve, Daozhen County, Guizhou Province, 1500m, 29–31 May 2004, X.-S. Chen; 2 3, 1♀, Linjiang, Xishui National Natural Reserve (28 ° 19´N, 106 ° 12´E), Guizhou Province, 1 June 2000, X.-S. Chen (IEGU). Etymology. This species name is derived from the name of the holotype locality, Daozhen County, Guizhou Province. Host plant. Unknown. Distribution. China (Guizhou Province) (Fig. 40). Remarks. This new species resembles C. tibetensis in the shape of the frons, vertex and pronotum but differs from the latter in: vertex and pronotum pale brown to yellowish brown (castaneous and brown in the latter); forewing milk-white with several small brown markings (in the latter, forewing brown, with several small gray markings, costal margin with a large, and several small, fuscous markings on apical third); mesonotum three times as long as vertex and pronotum together (two times in the latter). This species also resembles C. guadunensis in the shape of the frons, vertex and mesonotum but differs from the latter in: anterior margin of pronotum produced angularly (in the latter, anterior margin of pronotum truncate); forewing with several brown to fuscous markings (forewing without any marking in the latter).Published as part of Chen, Xiang-Sheng & He, Ting-Ting, 2009, Two new species of Catonidia Uhler (Hemiptera: Fulgoromorpha: Achilidae) from southwestern China, with the first description of the male of Catonidia wuyishanana Wang & Huang, pp. 43-52 in Zootaxa 2197 on pages 48-50, DOI: 10.5281/zenodo.18954
Infrared spectroscopic evidence of a direct addition reaction between palygorskite and pyromellitic dianhydride
No full textAncient Chinese Fables (5)
No full textA pleasant combination of simple oriental art and wise little stories. The two stories here are: The Deer of Linjiang (who had made friends with some pet dogs and expected then that wild dogs would be friendly....) and The Donkey of Guizhou (novel in this territory, he scared a tiger until he showed that all he could do was kick).Original language: chiDing E
Barbatula linjiangensis Chen & Zhang & Chen & Freyhof 2019, new species
No full text<i>Barbatula linjiangensis</i>, new species <p>(Fig. 26–28)</p> <p> <b>Holotype.</b> HU 1608016, 81.0 mm SL; China: Jilin prov.: Yalu River south-west of Linjiang City, 41°79′N 126°89′E (16); Hao Chen, Oct. 2016.</p> <p> <b>Paratypes.</b> HU 1608014, 1608016, 1608019–20, 4, 52.3–81.9 mm SL; same data as holotype.</p> <p> <b>Additional material examined.</b> HU 1609206, 1609242, 1609232, 1609238, 1609236, 1609239, 1708144–45, 8, 83.8–127.8 mm SL; FSJF 4049, 2, 107.7– 109.8 mm SL; China: Liaoning prov.: Pushi River at Xudianzi of Dandong Kuandian Manchu Autonomous, Yalu River drainage, 40°68′N 124°73′E (14); Hao Chen, May 2017. — — HU 1608734, 1608608, 1608609, 1608904, 4, 76.3–79.2 mm SL; China: Liaoning prov.: Ai River south of Yanjiacun in Fengcheng City, Yalu River drainage, 40°53′N 124°21′E (13); Hao Chen, May 2017.</p> <p> <b>Material used in the molecular genetic analysis.</b> HU 1608014, 1608016; China: Jilin prov.: Yalu River, 41°79′N 126°89′E (16). (GenBank accession numbers: MF770525 –26).— HU 1609232; China: Liaoning prov.: Pushi River, Yalu River drainage, 40°68′N 124°73′E (14). (GenBank accession number: MF 770527).— HU 1608734; China: Liaoning prov.: Ai River, Yalu River drainage, 40°53′N 124°21′E (13). (GenBank accession number: MF 770528).</p> <p> <b>Diagnosis.</b> <i>Barbatula linjiangensis</i> is distinguished from the other species of <i>Barbatula</i> in north-eastern China by a combination of characters, none of them unique. It is distinguished from all other species except <i>B. nuda</i> and <i>B. emuensis</i>, by having the nostrils closely set (vs. widely spaced) and no lateral expansion of the lower lip (vs. having).</p> <p> <i>Barbatula linjiangensis</i> is distinguished from <i>B. nuda</i> by having a shallow median incision in the upper lip, its depth is 10–30% of the width of the upper-lip (vs. deep, 40–60%) and sparsely set scales on flank anterior to dorsal-fin origin (vs. scales restricted to flank behind dorsal-fin base).</p> <p> <i>Barbatula linjiangensis</i> is distinguished from <i>B. emuensis</i> by the snout length being equal to the postorbitalhead length (vs. shorter), having a shallow median incision in the upper lip, its depth is 10–30% of the width of the upper-lip (vs. deep, 40–60%) and the pelvic-fin origin situated below the vertical through the dorsal-fin origin (vs. in front).</p> <p> <i>Barbatula linjiangensis</i> is further distinguished by having a blunt snout (vs. pointed in <i>B. liaoyangensis</i>), the upper jaw only partly covered by the upper lip (vs. completely covered in <i>B. toni</i>, <i>B. gibba</i>, <i>B. pechiliensis</i> and <i>B. liaoyangensis</i>), a slightly convex dorsal profile (vs. convex in <i>B. toni</i>, <i>B. gibba</i> and <i>B. pechiliensis</i>) and 7½ branched rays of dorsal fin (vs. 6½ in <i>B. potaninorum</i>).</p> <p> See Table 3 for the character states shown by the different species of <i>Barbatula</i> found in north-eastern China.</p> <p> <b>Description.</b> See Figure 26–27 for general appearance and Table 2 for morphometric data. Body elongate, roundish; caudal peduncle compressed. Dorsal profile slightly convex, parallel with ventral profile; caudalpeduncle depth 61–73% of body depth at dorsal-fin origin. Ventral profile between anal-fin base and caudal-fin origin concave. Head wider than deep, head depth 74–97% in its width at posterior margin of operculum. Mouth inferior and arched (Fig. 28a). Snout rounded, long and blunt; head width at posterior margin of operculum 1.4–1.5 times in its width at anterior nostril. Snout length equal to postorbital head length. Eye large and close to dorsal profile. Anterior and posterior nostril closely set (Fig. 28b). Caudal fin truncate. Caudal-peduncle length 82–104% in HL, caudal-peduncle width 40–50% its depth. Distance between anus and anal-fin origin shorter than eye diameter. Dorsal-fin origin situated at middle or behind middle between tip of snout and caudal-fin base. Pelvic-fin origin situated below vertical through dorsal-fin origin. Anal-fin origin anterior to midpoint between pelvic-fin origin and caudal-fin base.</p> <p>Lateral line complete, reaching to caudal-fin base. Scales sparsely set on flank anterior to dorsal-fin origin, absent on back and belly anterior to dorsal-fin origin, sparsely set on back and flank behind dorsal-fin origin, densely set on caudal peduncle. Scales sparsely set between pelvic-fin origin and anus. Scales on caudal peduncle with small focal zone and 29–33 radial grooves (Fig. 28c). Anterior nostril with short tube, posterior tube shorter or without. Width of anterior nostril much smaller than width of posterior nostril (Fig. 28b). Upper jaw not partly covered by upper lip. Upper lip with shallow median incision, its depth 10–30% of width of upper lip. Lower lip widely separate in middle. Mental lobe flattened, without expansion. Interspace between mental lobes narrowly exposing a small part of lower jaw. Lower lip without lateral expansion (Fig. 28a). Maxillary barbel usually reaching to posterior eye-margin, inner rostral barbel usually reaching to posterior margin of posterior nostril, outer rostral barbel usually reaching anterior margin of anterior nostril. In few individuals, barbels slightly shorter.</p> <p>Dorsal fin with 4 unbranched and 7½ branched rays. Anal fin with 2 unbranched and 5½ branched rays. Caudal fin with 7–8+8 branched rays. Pectoral fin with 1 unbranched and 10–11 branched rays. Pelvic-fin with 1 unbranched and 6–7 branched rays. Infraorbital canal confluent with occipital canal, not confluent with supraorbital canal. Infraorbital canal with 12–14, supraorbital with 8–9, occipital with 3, mandibular and preopercular with 13–14 pores. Intestine Z-shaped, anterior margin of zigzag loop not touching U-shaped stomach.</p> <p> <b>Colouration in alcohol.</b> Background colour pale yellow with dark-brown pattern. Head with two dark-brown lines on both sides of snout in life. Back with 13–15 large, dark-brown bars. Interspaces between the bars narrower than width of them. Flank with large cloudy speckles. Dorsal fin hyaline with 3–5 dark-brown bands formed by spots. Pectoral and pelvic fins hyaline without pigmentation or with few dark-brown spots. lack stripe extends from eye to insertion of maxillary barbel.</p> <p> <b>Sexual dimorphism</b>. Males have a longer pectoral-fin than females (pectoral-fin length 17–19% SL vs. 13– 15% in female) and the 2nd–7rd branched pectoral-fin rays are thickened in males (vs. not in female).</p> <p> <b>Distribution.</b> Known from the Yalu River drainage. The Yalu River forms the border between China and North Korea and we expect <i>B. linjiangensis</i> also to occur in North Korea. See Figure 2 for details.</p> <p> <b>Etymology.</b> The name of the species is derived from its type locality in the Chinese Linjiang City. An adjective.</p>Published as part of <i>Chen, Hao, Zhang, Hui, Chen, Yongxia & Freyhof, Jörg, 2019, A review of the Barbatula loaches (Teleostei: Nemacheilidae) from north-eastern China, with the description of four new species, pp. 1-36 in Zootaxa 4565 (1)</i> on pages 25-27, DOI: 10.11646/zootaxa.4565.1.1, <a href="http://zenodo.org/record/2589489">http://zenodo.org/record/2589489</a>
Computational data related to "Digital Navigation of Energy–Structure–Function Maps for Hydrogen-Bonded Porous Molecular Crystals"
No full textComputational data related to landscapes of predicted crystal structures reported in Digital Navigation of Energy–Structure–Function Maps for Hydrogen-Bonded Porous Molecular Crystals </span
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