464 research outputs found
Krisna strigicollis Spinola
No full textKrisna strigicollis (Spinola) (Figs 6, 14, 23, 75– 82) Material examined: China, Yunnan Prov.: 1 ɗ, 1 Ψ, Xishuangbanna, Menglong, 620m, 11-13 May 1974, Zhou Yao and Yuan Feng; 2 Ψ, Xishuangbanna, Menghan, 510m, 17–19 May 1974, Zhou Yao and Yuan Feng; 1 Ψ, Xishuangbanna, Mengla, 670m, 1–5 May 1974, Zhou Yao and Yuan Feng; Hainan Prov.: 1 ɗ, Dinganxian, Hanlin, 26 July 2002, Wang Zongqing and Wang Peiming; 1 Ψ, Bawangling, 28 May 1983, Zhang Yalin; Guangxi Prov.: 1 Ψ, Fangcheng, Tongzhong, 8 Feb. 2001, He Zhiqiang (all above in NWAFU). Distribution: China (Fujian, Yunnan, Hainan, Guangxi), India, Philippines, Cambodia, West Indonesia, Myanmar, Malaysia, Congo, Japan, Singapore, Borneo, Pakistan, Nepal.Published as part of Zhang, Yalin, Zhang, Xinmin & Dai, Wu, 2008, Three new species of the genus Krisna Kirkaldy (Hemiptera: Cicadellidae: Iassinae) from China, with a checklist of the genus, pp. 40-60 in Zootaxa 1783 on page 52, DOI: 10.5281/zenodo.18238
Vincetoxicum pingtaoanum Zhang & Wang & Chen & Zhou & Liao & Odago & Hu & Wang 2022, sp. nov.
No full textVincetoxicum pingtaoanum Cai F. Zhang, G.W. Hu & Q.F. Wang, sp. nov. (Figures. 2–4 and 5: A). Vincetoxicum pingtaoanum is similar to V. henryi, but it can be easily distinguished by the longer petioles (5–16 mm vs. 2–3 mm), long inflorescences (2.5–6 cm vs. 1–2 cm) with a rachis (vs. without a rachis and umbel-like) that are mostly longer (vs. shorter) than leaves, greenish-yellow (vs. purplish red) corollas with linear-lanceolate lobes ca. 5 mm (vs. triangular-ovate less than 2 mm) long (Figure 5). Additionally, it is similar to V. emeiense based on the corolla shapes, but differs in the yellowish green (vs. yellowish brown) corollas, shorter inflorescences (2.5–6 cm vs. 7–11 cm), coronas attached above the upper half gynostegia (vs. inserted near base of gynostegia) with obtuse (vs. truncate) lobes (Figure 5), and horizontal (vs. ascending) caudicles. Type:— CHINA. Chongqing City, Wuxi County, Lanying, Lanying Grand Canyon, 109.835471°E, 31.437667°N, 758 m a.s.l., path side and on rocks in the valley, 13 April 2021, Feng Chen, Hou-Lin Zhou, Xue-Bing Shi et al. YTL20-409 (Holotype: HIB! [HIB0208169]; isotypes: CQNM!, PE!). Evergreen woody lianas. Stems green, 1–1.5 mm in diameter, striated, glabrous except for a ring of trichomes around the nodes. Petioles 5–16 mm long, purplish, adaxially densely puberulent along the two sides of the grove, glabrescent when old, uppermost with 4–6 glands; leaf blades thinly coriaceous, lanceolate, lanceolate-ovate, sometimes ovate or elliptic especially when young, green, reddish when young, lower older ones 6–8 × 2.2–3 cm, upper ones 2.2–6.5 × 0.8–1.6 cm; base obtuse, cuneate or rounded, apex attenuate to acuminate, sometimes acute; midrib raised on both surfaces, lateral veins 4 –5 pairs, obscure in younger ones, glabrous except for a few trichomes on main vein, veins of older leaves prominently pale and reticulate. Inflorescences slender, with (2–) 9–14 flowers, 2.5–6.5 cm long, mostly with two cymules (each with 4–6 flowers) separated by a rachis, rarely 2- or 3-branched and zigzagging, usually longer than the adjacent leaves; peduncles 17–34 mm, longer than pedicles, glabrous; bracteoles ciliate. Pedicels slender 13–23 mm, purplish, glabrous. Calyx lobes purplish, triangle-ovate, ca. 1.5 × 0.7 mm, abaxially sparsely puberulent, each with a dark brown gland between adjacent lobes. Corolla yellowish green, purplish at the throat, deeply lobed, starfish-like, ca. 1 cm in diameter, slightly convex, exterior glabrous, interior minutely hairy; lobes spreading, twisted clockwise, ca. 5 × 1 mm, linear-lanceolate, margins revolute, apex rounded. Gynostegium green ca. 2 mm tall. Staminal corona 2–2.3 mm in diameter; lobes fleshy, ovoid, dorsally rounded, ca. 0.5 mm long, radiating from the stamina column and adnate to the upper half of the anthers.Anthers oblong-rhomboid, apex broadly triangular, subacute, inflexed; anther wings 0.5 mm long; apical appendages with conspicuous membranous margin. Pollinarium with two pollinia connected via caudicles to corpusculum; corpuscular narrowly ellipsoid, brownish, ca. 0.12 × 0.04 mm; caudicles horizontal, fusiform, 0.1 mm long; pollinia oblong-reniform, ca. 0.2 × 0.14 mm, apically attached to caudicles. Style-head flat. Follicles single or paired, narrowly fusiform, brownish, 52–55 × 5–6 mm, glabrous. Seeds brownish-black, ca. 7 × 2–2.5 mm, bottle-shaped, much compressed with one side nearly flat and slightly convex & papillose on the other, margins thinner; coma 15–21 mm long. Etymology:—The specific epithet ‘ pingtaoanum ’ is in honor of Prof. Ping-Tao Li (Ṫfflṧ, P.T. Li; 1936–) from South China Agriculture University, for his contributions to the taxonomy of Chinese Apocynaceae. Vernacular name:—Following a tradition of using geographic names as part of the plant vernacular names, we suggest ‘Three Gorges swallow-wort’ as the English common name and ‘Sanxia Baiqian (三ΚƦÑ)’ as the common Chinese name for the new species. Habitat:— 300–1200 m a.s.l, growing on rocks in open or semi-open areas. Phenology:—Flowering from April to August; exact fruiting period unknown, but the last growing season’s fruits with mature seeds can be found in April. Distribution and conservation status:— V. pingtaoanum is currently known only from five localities in the Three Gorges District in Central China (Fig. 1). Three localities are in the north of Yangtze River in Wushan and Wuxi Counties, while the other two are in the south of Yangtze River in Fengjie County. The direct distance among the five localities ranges from about 7.5 km to 75 km. Additionally, this species is expected to be found in the Hubei section of the Three Gorges District, especially in the nearby Badong, Zhushan, and Zhuxi counties (Fig. 1). However, the total occupancy area of V.pingtaoanum is estimated to be no more than 100 km 2 and is projected to decline because of continuous human activities and global climate changes. Thus, it is assessed as vulnerable (VU: B2 ab (ii, iii)) according to the IUCN criteria. Additional specimens examined (Paratypes):— CHINA. Chongqing. Fengjie County, [Xinglong Town], Xinhe, Guohekou, 700 m, in the humid forest along the roadside, 28 April 1964, Hong-Fu Zhou & He-Yi Su 107855 (IBSC! [0521747, 0521748]); Wushan County, Guanyang Town, Xinmin Village, 1200 m, on rocks near the bamboo woodland, 20 September 2021, Hou-Lin Zhou in Cai-Fei Zhang 6512 (HIB!). Observations:— CHINA. Wushan County, Guanyang Town, Xinmin Village, 1200 m, on rocks near the bamboo woodland photographed by Hou-Lin Zhou in May and August 2020 (Fig. 3: B); Wushan County, Pinghe, 31.275212°N, 110.007323°E, 300 m, in valley, photographed by Hou-Lin Zhou on 11 May 2022; Fengjie County, Xiaozhai, Tiankeng, 600 m, on rocks along the path side, photographed by Hou-Lin Zhou on 16 May 2019 (Fig. 3: C, D; Fig. 4: A, B).Published as part of Zhang, Cai-Fei, Wang, Yan, Chen, Feng, Zhou, Hou-Lin, Liao, Miao, Odago, Wyclif Ochieng, Hu, Guang-Wan & Wang, Qing-Feng, 2022, Vincetoxicum pingtaoanum (Apocynaceae: Asclepiadeae), a new species from the Three Gorges District in Central China, pp. 59-70 in Phytotaxa 564 (1) on pages 61-65, DOI: 10.11646/phytotaxa.564.1.4, http://zenodo.org/record/707782
Direct production of hard magnetic ribbons with enhanced magnetic properties by controlling cooling rate of melt
No full textWe produced a high-quality hard magnetic Fe81Co2Nb1Nd10B6 alloy by melt spinning without additional treatment. The as-spun ribbons produced at a wheel speed of similar to 25 m/s had the best hard magnetic properties: a remanence B-r, coercive force H-c, and maximum energy product (BH)(max) of 0.97 T, 676 kA/m, and 140 kJ/m(3), respectively. The Nd2Fe14B/alpha-Fe nanocomposite phases had grain sizes of similar to 10-30 nm. We investigated how the magnetic properties changed with wheel speed, finding that they depended on the as-spun structure and magnetic structure, which changed upon over-and under-quenching from the melt. (C) 2015 AIP Publishing LLC
Krisna furcata Zhang, Zhang & Dai, 2008, sp. nov.
No full textKrisna furcata sp. nov. (Figs 3, 11, 20, 43– 52) Yellow brown to fuscous, forewing with gray stripe along anterior margin of 3 subapical cells. Crown short, with rounded anterior margin between eyes, medially slightly longer than next to eyes, anterior margin with distinct rim as in K. strigicollis. Ocellus situated on front margin of crown next to corresponding eye, separated from eye by distance equal to ocellus diameter. Male eighth sternite with hind margin slightly concave. Male genitalia: Ventral pygophore process forked at apex, without small teeth and spicules, apical area of longer fork with few longitudinal rugae. Connective T-shaped with anterior margin medially produced. Subgenital plate with basal stem short. Style very long, apophysis long and narrow, slightly curved dorsally at apex without thickening. Aedeagus elongate, gradually narrowed to apex, curved dorsally near apex; more or less of uniform width in caudal view; phallotreme subapical on ventral surface. Measurements: Male 9.6mm long, 2.7mm wide across eyes, 3.0mm wide across hind margin of pronotum. Material examined: Holotype ɗ, China: Yunnan Prov., Xishuangbanna, Mengla, 870 m, 1 May 1974, Zhou Yao and Yuan Feng (NWAFU). Distribution: China (Yunnan). Remarks: This species resembles Krisna viridula Li & Wang externally but can be distinguished from the latter by its smaller size, by the basal projection of the ventral pygophore process being longer than half the length of pygophore process and by the aedeagal shaft being symmetrical at apex. Etymology. The name of this species refers to the forked ventral pygofer process.Published as part of Zhang, Yalin, Zhang, Xinmin & Dai, Wu, 2008, Three new species of the genus Krisna Kirkaldy (Hemiptera: Cicadellidae: Iassinae) from China, with a checklist of the genus, pp. 40-60 in Zootaxa 1783 on page 47, DOI: 10.5281/zenodo.18238
Potentially inappropriate medications in hospitalized older patients: a cross-sectional study using the Beers 2015 criteria versus the 2012 criteria
No full textXiaolin Zhang,1,* Shuang Zhou,2,* Kunming Pan,2 Xinran Li,2 Xia Zhao,2 Ying Zhou,2 Yimin Cui,2 Xinmin Liu1 1Department of Geriatrics, 2Department of Pharmacy, Peking University First Hospital, Beijing, China *These authors contributed equally to this work Aim: Polypharmacy and potentially inappropriate medications (PIMs) are prominent prescribing issues in elderly patients. The purpose of the study was to investigate the prevalence of PIMs identified by the Beers 2015 and 2012 criteria in older patients in China and identify the correlates of PIMs.Methods: This retrospective, cross-sectional study was conducted at Peking University First Hospital. The Beers 2015 and 2012 criteria were applied to evaluate PIMs among hospitalized patients. The associations between PIM use and independent variables were analyzed by logistic regression. The differences between PIM use according to Beers 2012 and 2015 criteria were calculated using chi-squared and kappa tests.Results: A total of 456 patients were analyzed; 244 (53.5%) and 204 (44.7%) patients had at least one PIM identified by the Beers 2015 and 2012 criteria, respectively. The most frequent PIMs were proton-pump inhibitors (PPIs), benzodiazepines, and benzodiazepine receptor agonists according to the Beers 2015 criteria. PIMs identified by the Beers 2015 criteria were associated with excessive polypharmacy (OR 1.864, 95% CI 1.210–2.871), a Barthel index ≤60 (OR 1.935, 95% CI 1.056–3.546), and the length of stay (OR 1.066, 95% CI 1.037–1.097). PIM use increased significantly between two criteria (chi-squared test, P<0.001), but good accordance was found between the previous and updated criteria (kappa test 0.782, P<0.001).Conclusion: Our study showed a high prevalence of PIM use in China, which was associated with various correlates. The Beers 2015 criteria detected significantly more PIMs than the 2012 criteria due to the inclusion of PPIs. Keywords: Beers criteria, inappropriate prescription, polypharmac
Sinojassus aspinus Dai, Zhang and Zhang, sp. nov.
No full textSinojassus aspinus Dai, Zhang and Zhang sp. nov. Figs 2, 5, 8, 28– 35. Male 7.5 mm long, 2.3 mm wide across eyes and 2.9 mm wide across hind margin of pronotum. Female 7.5 mm long, 2.3 mm wide across eyes and 2.9 mm wide across hind margin of pronotum. Ratio of width of head including eyes to hind margin of pronotum 0.79. Pale greenish brown with brown spots. Forewings and legs brown. Male genitalia: Caudal margin of pygofer convexly rounded, without macrosetae. Subgenital plate of uniform width, upturned, and with rounded apex, several microsetae on lateral margin. Style narrow and long, apophysis curved dorsally almost at right angle, robust with rounded apex. Aedeagus with well developed bifid dorsal apodeme, preatrium absent, aedeagal shaft slightly widened apically in lateral view, apex in caudal view broadened with apical median notch. Female genitalia: Seventh sternite 1.5 times as long as sixth, hind margin with slight V-shaped concavity. Material examined. Holotype 3, China, Sichuan Prov., Xikang, Gonggashan, 10–12 Sep. 1939, Zhou Yao, Zheng Fengling and Du Tianhe. Paratype: 1 Ƥ, data as holotype (All in NWAFU). FIGURES 1–13. Figs. 1, 4, 7, 11– 13, Sinojassus loberus; Figs. 2, 5, 8, Sinojassus aspinus; Figs. 3, 6, 9, Sinojassus compressus. 1–3, Habitus, dorsal view; 4–6, Habitus, lateral view; 7–9, face; 10, Female first gonapophysis; 11, Magnified view of apex of first gonapophysis; 12, female second gonapophysis; 13, Magnified view of apex of female second gonapophysis. Remarks. This species resembles Sinojassus loberus externally but can be distinguished from the latter by: 1) lack of dark patches on the forewings and legs brown; 2) subgenital plate not triangular; 3) male pygofer without a ventral lobe and without macrosetae; 4) aedeagus widened near apex with a median notch; and 5) style with more robust apophysis. Etymology. The name of the species refers to the absence of macrosetae on the male pygofer.Published as part of Dai, Wu, Zhang, Xinmin & Zhang, Yalin, 2010, A new Oriental genus of Iassini leafhoppers (Hemiptera: Cicadellidae: Iassinae) with description of four new species, pp. 15-26 in Zootaxa 2641 on pages 18-21, DOI: 10.5281/zenodo.19859
Controlled release of chitosan/heparin nanoparticle-delivered VEGF enhances regeneration of decellularized tissue-engineered scaffolds
No full textQi Tan, Hao Tang, Jianguo Hu, Yerong Hu, Xinmin Zhou, Yunming Tao, Zhongshi WuDepartment of Cardiothoracic Surgery Second Xiangya Hospital, Central South University, Changsha 410011, People&#39;s Republic of ChinaAbstract: Regeneration deficiency is one of the main obstacles limiting the effectiveness of tissue-engineered scaffolds. To develop scaffolds that are capable of accelerating regeneration, we created a heparin/chitosan nanoparticle-immobilized decellularized bovine jugular vein scaffold to increase the loading capacity and allow for controlled release of vascular endothelial growth factor (VEGF). The vascularization of the scaffold was evaluated in vitro and in vivo. The functional nanoparticles were prepared by physical self-assembly with a diameter of 67&ndash;132 nm, positive charge, and a zeta potential of ~30 mV and then the nanoparticles were successfully immobilized to the nanofibers of scaffolds by ethylcarbodiimide hydrochloride/hydroxysulfosuccinimide modification. The scaffolds immobilized with heparin/chitosan nanoparticles exhibited highly effective localization and sustained release of VEGF for several weeks in vitro. This modified scaffold significantly stimulated endothelial cells&#39; proliferation in vitro. Importantly, utilization of heparin/chitosan nanoparticles to localize VEGF significantly increased fibroblast infiltration, extracellular matrix production, and accelerated vascularization in mouse subcutaneous implantation model in vivo. This study provided a novel and promising system for accelerated regeneration of tissue-engineering scaffolds.Keywords: nanoparticle, scaffolds, VEGF, control release, vascularization, regeneratio
Study on the flexible practical education organization model for the cultivation of engineering innovation ability
No full textResearch on Perceived Value and Usage Intention of Tactile Interactive Advertising Among Consumers
No full textWith the maturity of haptic technology and complex systems, tactile interaction has gradually become realized through specific hardware and software configurations in the e-commerce and business industries. As an innovative form depending on haptic systems, tactile interactive advertising could help both advertisers and consumers enhance the haptic experience of products through technology-mediated virtual environments and provide tactile information for purchase decision making that relies on restoring the real sense of touch. On the basis of the value-based adoption model (VAM) and the need for touch (NFT) from a preference for haptic information in a system, we conduct quantitative research and construct a partial least squares structural equation model, which aims to study the influencing factors that characterize the user preference of tactile interactive advertisements empowered by haptic systems among Chinese consumers. A total of 509 valid questionnaires were collected through online and offline channels. The study revealed that the perceived enjoyment (PE) and telepresence (TEL) of tactile interactive advertisements as benefit factors positively influence the perceived value (PV) and that the perceived fee (PF) as a sacrifice factor negatively influences PV, which further impacts the attitude and intention to use (IU). In addition, the study verified that a higher NFT positively affected PE, PU, and PF and IU for the perception of tactile interactive advertising. Through this study, we aim to provide insights from a consumer perspective to enhance the advertising effect and user experience through tactile interaction in further e-commerce, which transforms how we interact with digital systems and virtual environments
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