96,495 research outputs found
A three-dimensional non-local lattice bond model for fracturing behavior prediction in brittle solids
No full textIn this paper, a 3D non-local lattice bond model is proposed to model fracturing behaviors of materials. First, the formulations and detailed derivation for three-dimensional non-local lattice bond models are obtained by comparing the strain energy stored in a discrete lattice with the classical continuum strain energy. Then, the capabilities of three-dimensional non-local lattice bond models are verified using benchmarks. To further assess the performance of the non-local lattice bond model, fracturing behaviors in brittle solids are predicted. Compared with the previous numerical results, the proposed model demonstrates better performances, which are more consistent with the experimental observations. © 2022, The Author(s), under exclusive licence to Springer Nature B.V
Perenniporia subrhizomorpha Tian & Liu & Zhou & Wang & Zhou 2021, sp. nov.
No full textPerenniporia subrhizomorpha Xue W. Wang, L.W. Zhou & X.M. Tian, sp. nov. (Figs. 2 & 3) MycoBank: MB 841348. Etymology:— subrhizomorpha (Lat.), refers to the similarity to Perenniporia rhizomorpha. Diagnosis:— Perenniporia subrhizomorpha is similar to P. rhizomorpha by having cream-colored rhizomorphs and similar pores (4–6 per mm), but differs in its wider generative hyphae and truncated basidiospores. Holotype:— CHINA. Hebei Province: Baoding, Laishui County, Yesanpo Bailixia Scenic Spot, on fallen branch of angiosperm, 23 July 2019, Li-Wei Zhou, LWZ 20190723-10 (HMAS!). Description:— Basidiomes annual, resupinate, adnate, papery, soft when fresh, becoming corky upon drying. Pore surface white when fresh, cream to buff upon drying; pores angular, 4-6 per mm; dissepiments thin, entire. Sterile margin thinning, white, up to 2 mm wide, usually with white to cream-colored rhizomorphs. Context cream, thin, up to 0.2 mm thick. Tubes concolorous with pore surface, corky, up to 0.6 mm long. Hyphal system dimitic; generative hyphae with clamp connections, slightly cyanophilous; skeletal hyphae cyanophilous; tissue unchanged in KOH. Generative hyphae in context infrequent, difficult to find, hyaline, thin-walled, unbranched, 4–5 μm diam, usually encrusted with crystals; skeletal hyphae in context dominant, hyaline, thick-walled with a distinct lumen, branched, interwoven, 3–4 μm diam. Generative hyphae in trama infrequent, difficult to find, hyaline, thin-walled, unbranched, 3.5–4.5 μm diam; skeletal hyphae in trama dominant, hyaline, thick-walled with a distinct lumen, branched, interwoven, 2–3 μm wide. Dendrohyphidia present at the dissepiments. Cystidia and cystidioles absent. Basidia clavate, with four sterigmata and a basal clamp connection, 17–20 × 9–10 μm; basidioles in shape similar to basidia but slightly smaller. Basidiospores ellipsoid to broadly ellipsoid, truncate, hyaline, thick-walled, smooth, dextrinoid, cyanophilous, (5.6–)5.7–6.5(–7.6) × (4.2–)4.3–5.5(–5.8) μm, L = 6.2 μm, W = 4.8 μm, Q = 1.26–1.29 (n = 60/2). Additional specimen (paratype) examined:— CHINA. Beijing: Fangshan District, Shangfangshan National Forest Park, on fallen trunk of angiosperm, 22 July 2019, Li-Wei Zhou, LWZ 20190722-36 (HMAS!).Published as part of Tian, Xue-Mei, Liu, Shi-Liang, Zhou, Lin-Jiang, Wang, Xue-Wei & Zhou, Li-Wei, 2021, Perenniporia subrhizomorpha sp. nov. (Polyporales, Basidiomycota) from North China, pp. 125-132 in Phytotaxa 528 (2) on page 129, DOI: 10.11646/phytotaxa.528.2.5, http://zenodo.org/record/577872
The L-p-to-L-q boundedness of commutators with applications to the Jacobian operator
No full textSupplying the missing necessary conditions, we complete the characterisation of the L-p -> L-q boundedness of commutators [b, T] of pointwise multiplication and Calderon-Zygmund operators, for arbitrary pairs of 1 q, our results are new even for special classical operators with smooth kernels. As an application, we show that every f is an element of L-p(R-d) can be represented as a convergent series of normalised Jacobians J(u) = det del uof u is an element of (over dot(W))(1,dp)(R-d)(d). This extends, from p = 1 to p > 1, a result of Coifman, Lions, Meyer and Semmes about J:. (over dot(W))(1,d)(R-d)(d) -> H-1(R-d), and supports a conjecture of Iwaniec about the solvability of the equation Ju = f is an element of L-p(R-d). (C) 2021 The Author(s). Published by Elsevier Masson SAS.Peer reviewe
Cheiroseius fenghuangensis Bei, Zhou & Chen 2010
No full textCheiroseius fenghuangensis Bei , Zhou & Chen, 2010 Cheiroseius fenghuangensis Bei, Zhou & Chen, 2010: 262. TYPE DEPOSITORY: Department of Entomology, College of Plant Protection, Shenyang Agricultural University, Liaoning, China. TYPE LOCALITY AND HABITAT: Fenghuang Mountain, Fengcheng, Liaoning, China, in soil. NOTE: the morphological characteristics provided in the original description of this species suggest that it could belong to a different genus, but they are not sufficient to indicate to which genus it belongs.Published as part of De Moraes, Gilberto J., Britto, Erika P. J., Mineiro, Jefferson L. De C. & Halliday, Bruce, 2016, Catalogue of the mite families Ascidae Voigts & Oudemans, Blattisociidae Garman and Melicharidae Hirschmann (Acari: Mesostigmata), pp. 1-299 in Zootaxa 4112 (1) on pages 142-143, DOI: 10.11646/zootaxa.4112.1.1, http://zenodo.org/record/39947
Dynamic splitting tensile properties of concrete and cement mortar
No full textTo investigate the dynamic tensile behaviours of concrete and cement mortar, a 50-mm split Hopkinson pressure bar was applied on Brazilian disc specimens for dynamic tensile experiments, in which strain rate varied from 10−5 to 20 s−1. The high-speed camera testing technique was used to capture the dynamic fractured process of the specimens at relative high strain rate. The experimental results revealed that the dynamic tensile strength of concrete specimens has a stronger strain rate effect than that of cement mortar specimens. Then three typical failure patterns of the specimens were confirmed in dynamic experiments. In addition, one-parameter semi-empirical relation between dynamic tensile strength and strain rate was established. Finally, the limitation of dynamic splitting experiments on Brazilian disc specimens was discussed in detail at high strain rate, in which the crack initiates from the contact point between the incident bar and specimens rather than the centre of the specimens
Angiotensin II induces soluble fms-Like tyrosine kinase-1 release via calcineurin signaling pathway in pregnancy
No full textMaternal endothelial dysfunction in preeclampsia is associated with increased soluble fms-like tyrosine kinase-1 (sFlt-1), a circulating antagonist of vascular endothelial growth factor and placental growth factor. Angiotensin II (Ang II) is a potent vasoconstrictor that increases concomitant with sFlt-1 during pregnancy. Therefore, we speculated that Ang II may promote the expression of sFlt-1 in pregnancy. Here we report that infusion of Ang II significantly increases circulating levels of sFlt-1 in pregnant mice, thereby demonstrating that Ang II is a regulator of sFlt-1 secretion in vivo. Furthermore, Ang II stimulated sFlt-1 production in a dose- and time-dependent manner from human villous explants and cultured trophoblasts but not from endothelial cells, suggesting that trophoblasts are the primary source of sFlt-1 during pregnancy. As expected, Ang II-induced sFlt-1 secretion resulted in the inhibition of endothelial cell migration and in vitro tube formation. In vitro and in vivo studies with losartan, small interfering RNA specific for calcineurin and FK506 demonstrated that Ang II-mediated sFlt-1 release was via Ang II type 1 receptor activation and calcineurin signaling, respectively. These findings reveal a previously unrecognized regulatory role for Ang II on sFlt-1 expression in murine and human pregnancy and suggest that elevated sFlt-1 levels in preeclampsia may be caused by a dysregulation of the local renin/angiotensin system
Measurements of K S 0 - K L 0 asymmetries in the decays Λ c + → p K L , S 0 , p K L , S 0 π + π − and p K L , S 0 π 0
No full textAbstract Using e + e − annihilation data sets corresponding to an integrated luminosity of 4.5 fb −1, collected with the BESIII detector at center-of-mass energies between 4.600 and 4.699 GeV, we report the first measurements of the absolute branching fractions B Λ c + → p K L 0 = (1.67 ± 0.06 ± 0.04)%, B Λ c + → p K L 0 π + π − = (1.69 ± 0.10 ± 0.05)%, and B Λ c + → p K L 0 π 0 = (2.02 ± 0.13 ± 0.05)%, where the first uncertainties are statistical and the second systematic. Combining with the known branching fractions of Λ c + → p K S 0 , Λ c + → p K S 0 π + π − , and Λ c + → p K S 0 π 0 , we present the first measurements of the K S 0 - K L 0 asymmetries R Λ c + K S , L 0 X = B Λ c + → K S 0 X − B Λ c + → K L 0 X B Λ c + → K S 0 X + B Λ c + → K L 0 X in charmed baryon decays: R Λ c + p K S , L 0 = − 0.025 ± 0.031 , R Λ c + p K S , L 0 π + π − = − 0.027 ± 0.048 and R Λ c + p K S , L 0 π 0 = − 0.015 ± 0.046 . No significant asymmetries with statistical significance are observed
Price Competition with Consumer Confusion
No full textThis paper proposes a model in which identical sellers of a homogeneous product compete in both prices and price frames (i.e., ways to present price information). Frame choices affect the comparability of price offers, and may cause consumer confusion and lower price sensitivity. In equilibrium, firms randomize their frame choices to obfuscate price comparisons and sustain positive profits. The nature of equilibrium depends on whether frame differentiation or frame complexity is more confusing. Moreover, an increase in the number of competitors induces firms to rely more on frame complexity and this may boost industry profits and lower consumer surplus
Salinadaptatus halalkaliphilus Xue & Zuo & Zhou & Zhou & Zhang & Han & Zhao & Xiang 2021, SP. NOV.
No full textDESCRIPTION OF <i>SALINADAPTATUS HALALKALIPHILUS</i> SP. NOV. <p> <i>Salinadaptatus halalkaliphilus</i> (hal.al.ka.li′ phi.lus. Gr. masc. n. <i>hals halos</i> salt; N.L. n. <i>alkali</i> alkali; Gr. masc. adj. <i>philus</i> friend, loving; N.L. masc. adj. <i>halalkaliphilus</i> salt and alkali-loving). Cells are motile, rod-shaped and Gram-stain-negative. Cell size is 0.4–0.8µm wide and 1.0–2.0µm long. Colonies are pink, smooth, convex, round, and 1.0–2.0 mm in diameter when cultured on the AM plate at 42 °C for 7–10days. Cell lysis occurs in distilled water and the minimal NaCl concentration to prevent cell lysis is 0.85 M. Growth occurs in the presence of 2.6–5.3 M NaCl (optimum 4.4 M), at 30–50 °C (optimum 42 °C) and pH 7.0–10.0 (optimum pH 8.0–8.5). No requirement for Mg 2+, but grows well with the addition of Mg 2+ up to 5 mM. Oxidase and catalase tests are positive. Anaerobic growth does not occur in the presence of nitrate, L-arginine or DMSO. H 2 S is produced from cysteine but not from thiosulfate. Indole is produced from tryptophan. Nitrate and nitrite cannot be reduced, and no gas formation occurs. Gelatin and Tweens 20, 40, 60, 80 are hydrolysed but starch and casein are not hydrolysed. The following substrates are utilized as single carbon and energy sources for growth: glycerol, D-glucose,D-galactose, sucrose, lactose, D-sorbitol, acetate, succinate, L-malate, fumarate, L-glutamate, citrate, L-aspartate. The following substrates are not utilized as sole sources of carbon and energy: chitin, mannose, maltose, starch, pyruvate, lactate, L-alanine,L-ornithine,D-fructose, D-sorbose,D-xylose, glycine,L-arginine,L-lysine. Acid was produced from glycerol, but not fromD-glucose,D-galactose, sucrose, lactose, D-sorbitol, mannose, maltose, D-fructose, D-sorbose, andD-xylose. The major polar lipids are phosphatidylglycerol (PG) and phosphatidylglycerol phosphate methyl ester (PGP-Me), but glycolipids were not detected. The main quinones are MK-8 and MK-6. The type strain, XQ-INN 246 T (=CGMCC 1.16692 T =JCM 33751 T), was isolated from a salt pond named Yanpaozi Lake of Xilingol, in Inner Mongolia Autonomous Region, China. The genomic DNA G+C content of this strain is 62.06 mol% (determined from the genome sequence).</p> <p> The GenBank accession number of the 16S rRNA gene sequence of the strain XQ-INN 246 T is MK226479.</p> <p> The GenBank accession number of the genome sequence of the strain XQ-INN 246 T is RBZW00000000.</p>Published as part of <i>Xue, Qiong, Zuo, Zhenqiang, Zhou, Heng, Zhou, Jian, Zhang, Shengjie, Han, Jing, Zhao, Dahe & Xiang, Hua, 2021, Salinadaptatus halalkaliphilus gen. nov., sp. nov., a haloalkaliphilic archaeon isolated from salt pond in Inner Mongolia Autonomous Region, China, pp. 1-10 in International Journal of Systematic and Evolutionary Microbiology (004584) (004584) 71 (1)</i> on page 9, DOI: 10.1099/ijsem.0.004584, <a href="http://zenodo.org/record/6048712">http://zenodo.org/record/6048712</a>
De Maiestate / Praeside M. Jacobo Thomasio, Moralis Philosoph. P. P., publice disputabit Johannes Dunte, R. L. Author & Respon: ad diem 9. Septembr. H L. Q. C.
No full textDE MAIESTATE / PRAESIDE M. JACOBO THOMASIO, MORALIS PHILOSOPH. P. P., PUBLICE DISPUTABIT JOHANNES DUNTE, R. L. AUTHOR & RESPON: AD DIEM 9. SEPTEMBR. H L. Q. C.
De Maiestate / Praeside M. Jacobo Thomasio, Moralis Philosoph. P. P., publice disputabit Johannes Dunte, R. L. Author & Respon: ad diem 9. Septembr. H L. Q. C. (1)
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