135,437 research outputs found
Corrigendum to “General reduced vehicle model for simulating truck-bridge pier collisions” [Dev. Built. Environ. 16 (2023) 100233] (Developments in the Built Environment (2023) 16, (S2666165923001151), (10.1016/j.dibe.2023.100233))
No full textThe authors regret there were two errors in the authors' affiliation in the published article. First, the affiliation of the first author (Daogang Ou) should only be the School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China. Second, the corresponding author (Lin Chen) should have two affiliations; the first one should be: School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China; and the second one should be: Key Laboratory of Building Safety and Energy Efficiency of Ministry of Education, Hunan University, Changsha, 410082, China. The authors would like to apologise for any inconvenience caused
Structure characterization and tribological study of magnetron sputtered nanocomposite nc-TiAlV(N, C)/a-C coatings
Get PDFGrown by reactive unbalanced magnetron sputtering in a mixed N2 and CH4 gaseous medium, heterogeneous nanocomposite coatings in the Ti-Al-V-N-C system show extraordinarily excellent tribological performance of coated machining tools. Using analytical high resolution TEM, EELS, FEG-SEM, XRD, and Raman spectroscopy, this paper reports detailed structural and chemical characterization of the coatings grown at various CH4: N2 ratios. Meanwhile, the mechanical and tribological properties were also measured, including hardness, Young’s modulus, residual stress and the dry-sliding friction and wear at varying environmental humidity. When CH4 gas was introduced in the deposition, the structure of the coatings has been found to experience a change from nano-scale TiAlN-VN multilayer architecture to a complex mixture of columnar grains of nc-TiAlV(N,C)/a-C nanocomposites and inter-column network of sp2-type amorphous carbon. Carbon incorporation and segregation also shows remarkable influence on the columnar growth model by leading to finer grain size. As compared to the carbon-free nitride coating, the nanocomposite coatings showed substantially reduced residual stress owing to the free-carbon precipitation, whereas the coatings maintained comparable hardness to the carbon-free TiAlN/VN. Their tribological properties were found to be strongly dependent on the environment. In humid air at RH > 30%, the coatings showed low friction coefficient less than 0.4 and extremely low wear rate at a scale of ~10-17 m3N-1m-1
Critical Two-Point Function for Long-Range Models with Power-Law Couplings: The Marginal Case for d >= d(c)
Get PDFConsider the long-range models on Z(d) of random walk, self-avoiding walk, percolation and the Ising model, whose translation-invariant 1-step distribution/coupling coefficient decays as |x|(-d-alpha) for some alpha > 0. In the previous work (Chen and Sakai in Ann Probab 43:639-681, 2015), we have shown in a unified fashion for all alpha not equal 2 that, assuming a bound on the "derivative" of the n-step distribution (the compoundzeta distribution satisfies this assumed bound), the critical two-point function G(pc) (x) decays as |x|(alpha boolean AND 2-d) above the upper-critical dimension d(c) = (alpha boolean AND 2)m, where m = 2 for self-avoiding walk and the Ising model and m = 3 for percolation. In this paper, we show in a much simpler way, without assuming a bound on the derivative of the n-step distribution, that G(pc) (x) for the marginal case alpha = 2 decays as |x|(2-d)/ log |x| whenever d >= d(c) (with a large spread-out parameter L). This solves the conjecture in Chen and Sakai (2015), extended all the way down to d = d(c), and confirms a part of predictions in physics (Brezin et al. in J Stat Phys 157:855-868, 2014). The proof is based on the lace expansion and new convolution bounds on power functions with log corrections
Erratum to: Effect of moderate red wine intake on cardiac prognosis after recent acute myocardial infarction of subjects with Type 2 diabetes mellitus (Diabetic Medicine, (2006), 23, 9, (974-981), 10.1111/j.1464-5491.2006.01886.x)
No full textIn an article by Marfella et al, the author name C. Saron is incorrect and should be listed as C. Sardu. Therefore the correct author list is: R. Marfella, F. Cacciapuoti, M. Siniscalchi, F. C. Sasso, F. Marchese, F. Cinone, E. Musacchio, M. A. Marfella, L. Ruggiero, G. Chiorazzo, D. Liberti, G. Chiorazzo, G. F. Nicoletti, C. Sardu, F. D'Andrea, C. Ammendola, M. Verza and L. Coppola.In an article by Marfella et al, the author name C. Saron is incorrect and should be listed as C. Sardu. Therefore the correct author list is: R. Marfella, F. Cacciapuoti, M. Siniscalchi, F. C. Sasso, F. Marchese, F. Cinone, E. Musacchio, M. A. Marfella, L. Ruggiero, G. Chiorazzo, D. Liberti, G. Chiorazzo, G. F. Nicoletti, C. Sardu, F. D'Andrea, C. Ammendola, M. Verza and L. Coppola
First observation of B → D ̄_1 (→ D ̄ π+π-) l+ν l and measurement of the B → D ̄(∗) π l+ νl and B → D ̄(∗) π+ π- l+ νl branching fractions with hadronic tagging at Belle
No full textWe report measurements of the ratios of branching fractions for B→D ̄(∗)πl+νl and B→D ̄(∗)π+π-l+νl relative to B→D ̄∗l+νl decays with l=e, μ. These results are obtained from a data sample that contains 772×106BB ̄ pairs collected near the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. Fully reconstructing both B mesons in the event, we obtain B(B0→D ̄0π-l+νl)B(B0→D∗-l+νl)=(7.23±0.36±0.14)%, B(B+→D-π+l+νl)B(B+→D ̄∗0l+νl)=(6.78±0.24±0.18)%, B(B0→D ̄∗0π-l+νl)B(B0→D∗-l+νl)=(11.10±0.48±0.23)%, B(B+→D∗-π+l+νl)B(B+→D ̄∗0l+νl)=(9.50±0.33±0.34)%, B(B0→D-π+π-l+νl)B(B0→D∗-l+νl)=(2.91±0.37±0.26)%, B(B+→D ̄0π+π-l+νl)B(B+→D ̄∗0l+νl)=(3.10±0.26±0.22)%, B(B0→D∗-π+π-l+νl)B(B0→D∗-l+νl)=(0.99±0.43±0.20)%, B(B+→D ̄∗0π+π-l+νl)B(B+→D ̄∗0l+νl)=(1.25±0.27±0.15)%, where the uncertainties are statistical and systematic, respectively. These are the most precise measurements of these branching fraction ratios to date. The invariant mass spectra of the Dπ, D∗π, and Dππ systems are studied, and the branching fraction products B(B0→D2∗-l+νl)×B(D2∗-→D ̄0π-)=(0.157±0.015±0.005)%, B(B+→D ̄0∗0l+νl)×B(D ̄0∗0→D-π+)=(0.054±0.022±0.005)%, B(B+→D ̄2∗0l+νl)×B(D ̄2∗0→D-π+)=(0.163±0.011±0.008)%, B(B0→D1-l+νl)×B(D1-→D ̄∗0π-)=(0.306±0.050±0.029)%, B(B0→D1′-l+νl)×B(D1′-→D ̄∗0π-)=(0.206±0.068±0.025)%, B(B0→D2∗-l+νl)×B(D2∗-→D ̄∗0π-)=(0.051±0.040±0.010)%, B(B+→D ̄10l+νl)×B(D ̄10→D∗-π+)=(0.249±0.023±0.015)%, B(B+→D ̄1′0l+νl)×B(D ̄1′0→D∗-π+)=(0.138±0.036±0.009)%, B(B+→D ̄2∗0l+νl)×B(D ̄2∗0→D∗-π+)=(0.137±0.026±0.009)%, B(B0→D1-l+νl)×B(D1-→D-π+π-)=(0.102±0.013±0.009)%, B(B+→D ̄10l+νl)×B(D ̄10→D ̄0π+π-)=(0.105±0.011±0.009)%, are extracted. This is the first observation of the decays B→D ̄1l+νl with D1→Dπ+π-
Cobitis oxycephala Chen YX & Chen YF 2018, sp. nov.
No full textCobitis oxycephala Chen YX & Chen YF, sp. nov. (Figs 2–7) Cobitis sinensis Chen, 1986 (nec. Sauvage & Dabry, 1874): 145 (Hainan, fig. 81). Cobitis taenia dolichorhynchus Nichols & Popo, 1927 (nec. Nichols, 1918): 335 (Hainan, fig. 8); Nichols, 1943: 197 (Fukien, Kwangtung, Hainan, fig. 81). Holotype. ♂, IHB 0509273, 67.7 mm TL, 57.9 mm SL, China, Hainan, Ding’an County (19°68′N, 110°36′E; elev. 65 m), the Nandujiang River, July 2005, leg. Kun Li. Paratypes. IHB 0509392–9, 0509401–5, 13♂, 63.1–70.3 mm TL, 51.8– 59.1 mm SL, IHB 509400, 0509406–7, 3♀, 74.6–84.7 mm TL, 61.6–71.6 mm SL, same data as holotype. Diagnosis. The new species can be distinguished from its congeners by possessing the following combination of characteristics: 13–15 large rectangular blotches on L 1; 10–14 elongated blotches on L 5; snout sharp (Figs 2–3); males with a semicircular lamina circularis at the base of the first branched pectoral fin ray (Fig. 4); mental lobes undeveloped, three superficial longitudinal lobes short and bluntly rounded (Fig. 5); suborbital spine thick and curved, with a short processus medio-caudalis (Fig. 6). Cobitis oxycephala Chen YX & Chen YF, sp. nov. is similar to C. sinensis, C. dolichorhynchus and C. zhejiangensis in color pattern (with L 1 –L 5 line on the body) and lamina circularis morphology (plate-like), but differs from them in having snout sharp (vs. rounded); 10–14 horizontally elongated blotches and without the deeper faint dusky band on L 5 (vs. 11–12 rectangular and vertically elongate spots in C. sinensis (Son & Kim, 2002); a row of more or less oval blotches and with the deeper faint dusky band on the mid-lateral line in C. dolichorhynchus (Nichols, 1918); 14–16 short vertical spots in C. zhejiangensis). It further differs from C. dolichorhynchus and C. zhejiangensis in body slender, depth 7.6 in SL in male and 7.7 in female (vs. sturdy, depth 5.8 in SL in male in C. dolichorhynchus (Nichols, 1918); 5.6–6.7 (mean 6.0) in males and 4.3–5.0 (mean 4.7) in females in C. zhejiangensis); 13–15 large rectangular blotches on L 1 (vs. irregular dark cross blotches in C. dolichorhynchus (Nichols, 1918); 13–19 rectangular blotches in C. zhejiangensis). Description (Figs 2–7, Table 2). D. III–7; A. III–5; V. I–6; P. I–6–7; C. IV–14–16–IV. Body moderately slender, compressed. Head small. Snout sharp. Eyes located on upper part and middle of head. Preorbital part of head equal to or longer than postorbital part of head. Mouth small, inferior, with three pairs of short barbels. Length of maxillo-mandibular barbels shorter than diameter of eye. Mental lobes undeveloped, three superficial longitudinal lobes short and bluntly rounded (Fig. 5) Suborbital spine thick and curved, with a short processus medio-caudalis. Processus latero-caudalis long, less than one-third of processus medio-caudalis (Fig. 6). Subdorsal scales small, oval, with a moderately large focal area, 18–20 radial grooves, and 3–5 supplementary ones (Fig. 7). Dorsal fin moderately long, inserted midway between nostril and base of caudal fin. In males, pectoral fins long, second pectoral fin ray longest (Fig. 2). In females, pectoral fins slightly short, third pectoral fin ray longest (Fig. 3). Ventral fins small and short, approximately at same level as second or third branched dorsal-fin ray. Anal fin short, located on half of space between ventral and caudal fins. Anal orifice close to anal fin. Caudal fin long, emarginated tip. Caudal peduncle with ventral adipose crest. Lateral line long, not exceeding length of pectoral fins in males, and exceeding in females. Pigmentation pattern. Color characterized by pigmentation pattern with five longitudinal lines of dark speckles on dorsolateral sides of body (L 1 –L 5 from dorsal to ventral) (Figs 2–3). Color pattern characteristic of sexual dimorphism not observed. Head sprinkled with many black dots, and a black stripe extended from insertion of rostral barbels through eye to occiput. L 1 consisted of a row of 5–6 large rectangular blotches before dorsal fin; 2 on dorsal fin and 6–7 behind dorsal fin. Gap of rectangular blotches smaller than width of blotches. L 2 composed of a line of irregularly small and solitary spots or blotches and not intermingle with gap of large rectangular blotches, and reaching beyond dorsal fin. L 3 composed a narrow stripe beyond anal fin and a row of rounded blotches behind anal fin. L 4 composed of a line of minute black dots, which fused to a line and diminished towards end of ventral fin. L 5 consisted of a row of 10–14 horizontally elongated blotches, without deeper faint dusky band. One small oblique vertical jet blotch at upper base of caudal fin base and far smaller than eye diameter. 4–5 narrow rows of dark dots on dorsal and caudal fins. Sexual dimorphism. Males smaller than females with proportionally longer pectoral fins. In males, second pectoral fin ray thickened and elongated, a semicircular lamina circularis at base of first branched pectoral fin ray. In females, third pectoral fin ray elongated. Distribution. This new species occurs in the Nandujiang River, Hainan, China (Fig. 1). Etymology. The species name is derived from the Greek oxys, meaning sharp, and kephale meaning head, in reference to the pointed head of the species.Published as part of Chen, Yongxia, Chen, Hao, He, Dekui & Chen, Yifeng, 2018, Two new species of the genus Cobitis (Cypriniformes: Cobitidae) from South China, pp. 156-168 in Zoological Systematics 43 (2) on pages 160-162, DOI: 10.11865/zs.201814, http://zenodo.org/record/461768
Search for the decay Bs0→D*∓π±
Get PDFA search for the decay Bs0→D*∓π± is presented using a data sample corresponding to an integrated luminosity of 1.0 fb-1 of pp collisions collected by LHCb. This decay is expected to be mediated by a W-exchange diagram, with little contribution from rescattering processes, and therefore a measurement of the branching fraction will help us to understand the mechanism behind related decays such as Bs0→π+π- and Bs0→DD̅ . Systematic uncertainties are minimized by using B0→D*∓π± as a normalization channel. We find no evidence for a signal, and set an upper limit on the branching fraction of B(Bs0→D*∓π±)<6.1(7.8)×10-6 at 90% (95%) confidence level
Didymella pomorum Q. Chen & L. Cai, Studies
No full text<p> <i>Didymella pomorum</i> (Thüm.) Q. Chen & L. Cai, Studies in Mycology. 82: 179. 2015 a</p> <p>Description.</p> <p>see Boerema (1993).</p> <p>Materials examined.</p> <p> China, Yunnan Province, from diseased leaves of <i>C. sinensis</i> cv. <i>Dalicha</i>, 22 Jun 2019, Y. C. Wang, culture YCW 196.</p> <p>Notes.</p> <p> <i>Didymella pomorum</i> was introduced as <i>Phoma pomorum</i> before the comprehensive revision of Didymellaceae (Chen et al. 2015 a). Chen et al. (2015 a) regarded four taxa of the respective <i>Phoma pomorum</i> varieties, viz. vars. <i>circinata</i> (CBS 285.76), <i>cyanea</i> (CBS 388.80) and <i>pomorum</i> (CBS 539.66) and the species <i>Ph. triticina</i> (CBS 354.52) to be conspecific and treated them as a single species <i>D. pomorum</i>. Pycnidia produced by this species are usually subglobose-ampulliform with a distinct ostiole (Boerema 1993). It can cause leaf spots on many plants (Boerema 1993; Romero et al. 2021). In the present study, one isolate from diseased tea plant leaves is closely related to <i>D. sinensis</i> with high statistical support (Fig. 2). This is the first report of <i>D. pomorum</i> isolated from <i>C. sinensis</i>.</p>Published as part of <i>Wang, Yuchun, Tu, Yiyi, Chen, Xueling, Jiang, Hong, Ren, Hengze, Lu, Qinhua, Wei, Chaoling & Lv, Wuyun, 2024, Didymellaceae species associated with tea plant (Camellia sinensis) in China, pp. 217-251 in MycoKeys 105</i> on pages 217-251, DOI: 10.3897/mycokeys.105.11953
Flavobacterium niveum Chen & Chen & Young & Sheu 2019, SP. NOV.
No full textDESCRIPTION OF FLAVOBACTERIUM NIVEUM SP. NOV. Flavobacterium niveum (ni′ ve.um. L. neut. adj. niveum white, referring to the white bacterial colony). Cells are Gram-stain-negative, strictly aerobic and rodshaped. No flagellum is detected. Gliding motility is observed. Cells grow well on R2A agar, nutrient agar, Luria-Bertani agar and trypticase soy agar. After 48 h of incubation on R2A agar at 25 Ǫ C, the mean cell size is 0.5–0.7 µm wide and 0.8–2.0 µm long. Colonies on R2A agar are white, convex and circular with regular margins. The colony size is approximately 1.0– 2.5 mm in diameter after 48 h at 25 Ǫ C. Growth occurs at 15–30 Ǫ C (optimum, 20 Ǫ C), at pH 6–8 (optimum, pH 7) and with 0–2 % NaCl (optimum, 0.5 %). Positive for oxidase and catalase activities and hydrolysis of starch, DNA and Tween 80. Negative for hydrolysis of casein, CM-cellulose, chitin, lecithin, corn oil and Tweens 20, 40 and 60. Flexirubin-type pigments are not produced and Congo red is not absorbed by colonies. In API 20NE tests, positive for aesculin and gelatin hydrolysis, b- galactosidase activity and assimilation of glucose, arabinose, mannose and maltose; negative for nitrate reduction, indole production, D- glucose acidification, arginine dihydrolase and urease activities and assimilation of mannitol, N -acetylglucosamine, gluconate, caprate, adipate, malate, citrate and phenyl-acetate. In the API ZYM kit, alkaline phosphatase, C4 esterase, C8 esterase lipase, leucine arylamidase, valine arylamidase, cystine arylamidase, trypsin, acid phosphatase, naphthol-AS-BI-phosphohydrolase, a- galactosidase, b-galactosidase, a- glucosidase and b- glucosidase activities are present, but C14 lipase, a- chymotrypsin, b- glucuronidase, N -acetyl-b- glucosaminidase, a- mannosidase and a- fucosidase activities are absent. The following compounds are utilized as sole carbon sources in the GN2 microplate: dextrin, glycogen, cellobiose, L- fucose, gentiobiose, D- glucose, lactose, maltose, D- mannose, melibiose, sucrose, trehalose, turanose, succinic acid monomethylester, acetic acid, DL- lactic acid, D- alanine, L- alanine, L- alanyl glycine, L- asparagine, L-aspartic acid, L- glutamic acid, glycyl-L- aspartic acid, glycyl-L- glutamic acid, L- histidine, L- ornithine, L- proline, L-serine, L- threonine, urocanic acid, inosine, uridine and thymidine. All other substrates in the GN2 microplate are not utilized. The predominant fatty acids (>10 % of the total fatty acids) are summed feature 3 (C 16: 1 Ɯ 6 c and/or C 16: 1 Ɯ 7 c), iso-C 15: 0 and C 16: 0. The major hydroxyl fatty acids (>5 %) are iso-C 17: 0 3-OH. The only respiratory quinone is MK-6. The polar lipid profile consists of phosphatidylethanolamine, three uncharacterized aminophospholipids, one uncharacterized phospholipid and one uncharacterized lipid. Homospermidine is the major polyamine, and putrescine and spermidine are minor components. *Summed features are groups of two or three fatty acids that are treated together for the purpose of evaluation in the MIDI system and include both peaks with discrete ECLs as well as those where the ECLs are not reported separately. Summed feature 3 was listed as C16: 1 Ɯ 6 c and/or C16: 1 Ɯ 7 c. The type strain is TAPW14 T (=BCRC 81055 T = LMG 30057 T =KCTC 52808 T), isolated from the water of Wanan Creek in Pingtung County, Taiwan. The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence is LT703450. The DNA G+C content of the type strain is 46.0 mol%.Published as part of Chen, Wen-Ming, Chen, Wei-Ting, Young, Chiu-Chung & Sheu, Shih-Yi, 2019, Flavobacterium niveum sp. nov., isolated from a freshwater creek, pp. 271-277 in International Journal of Systematic and Evolutionary Microbiology 69 (1) on pages 275-276, DOI: 10.1099/ijsem.0.003150, http://zenodo.org/record/604862
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
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