1,419 research outputs found
Enhanced Z boson decays as a new probe of first-order electroweak phase transition at future lepton colliders
No full text© 2019 authors. Published by the American Physical Society. We study phenomenological consequences of the strong first-order electroweak phase transition in an extension of the standard model with an inert doublet and vectorlike leptons motivated by the muon g - 2 anomaly and dark matter. We find that a condition for the strong first-order electroweak phase transition inevitably induces a large logarithmic enhancement in Z boson decays, which relegates the explanation of the anomalous muon g - 2 at below 2 sigma level. Our analysis shows that future lepton collider experiments, especially the Giga-Z at the International Linear Collider and Tera-Z at the Circular Electron Positron Collider as well as Future Circular Collider have great capability to explore the nature of the electroweak phase transition, which is complementary to conventional approaches via measurements of the triple Higgs boson coupling and gravitational waves11Nsciescopu
Probing the baryogenesis and dark matter relaxed in phase transition by gravitational waves and colliders
No full textThe cosmological phase transition with Q-balls production mechanism can explain the baryogenesis and dark matter simultaneously, where constraints on dark matter masses and reverse dilution are significantly relaxed. We study how to probe this scenario by collider signals at QCD next-to-leading order and gravitational wave signals
© 2017 American Physical Society5511Nsciescopu
Extension of the electrodynamics in the presence of the axion and dark photon
No full textc World Scientific Publishing Company. We present the extended electrodynamics in the presence of the axion and dark photon. We derive the extended versions of Maxwell's equations and dark Maxwell's equations (for both massive and massless dark photons) as well as the wave equations. We discuss the implications of this extended electrodynamics including the enhanced effects in the particle conversions under the external magnetic or dark magnetic field. We also discuss the recently reported anomaly in the redshifted 21 cm spectrum using the extended electrodynamics11Nsciescopu
Exploring dynamical CP violation induced baryogenesis by gravitational waves and colliders
No full textBy assuming a dynamical source of CP violation, the tension between sufficient CP violation for successful electroweak baryogenesis and strong constraints from current electric dipole moment measurements could be alleviated. We study how to explore such scenarios through gravitational wave detection, collider experiments, and their possible synergies with a well-studied example. © 2018 authors. Published by the American Physical Society11Nsciescopu
Radio telescope search for the resonant conversion of cold dark matter axions from the magnetized astrophysical sources
No full textWe study the conditions for the adiabatic resonant conversion of the cold dark matter (CDM) axions into photons in the astrophysically sourced strong magnetic fields such as those in the neutron star magnetosphere. We demonstrate the possibility that the forthcoming radio telescopes such as the SKA (Square Kilometre Array) can probe those photon signals from the CDM axions. © 2018 authors. Published by the American Physical Society11Nsciescopu
Lobrathium tortile Zheng, Fa-Ke 1988
No full textLobrathium tortile F.-K. Zheng, 1988 Material studied. CHINA: Sichuan: 1 ♀, Baoxing County, Fengtongzhai, 30°32’03’’N, 102°55’05’’E, 570 m, 22.VII.2015, Jiang, Peng, Tu & Zhou leg. (SNUC); 3 ♂♂, Baoxing Hsien, Fengtongzhai 30°34’21.95’’N, 102°52’54.92’’E, 1594 m, 31.VII.2016, near stream, Zhou Jiang, Liu & Gao leg. (SNUC); 3 ♂♂, Shimian Hsien, Liziping N. R, Gongyihai Refuge 29°01’30.76’’N, 102°23’05.11’’E, 2056 m, 25.VII.2016, near stream, Zhou Jiang, Liu & Gao leg. (SNUC); 1 ♂, Shimian County Liziping, 28°59’52’’N, 102°18’9’’E, 2400 m, 16.VII.2012, Dai, Peng & Yin leg. (SNUC); 1 ♂, Meigu County Hongxi P.S, 28°36’N, 103°07’E, 2541 m, 13. VI.2012, Huang leg. (SNUC); 1 ♂, Tianquan County Lianglu Village 28°55’33’’N, 102°23’9’’E, 2541 m, 9.VII.2012, Dai, Peng & Yin leg. (SNUC); 1 ♂, Muli, Lizipingxiang 28°04’N, 101°10’E, 2800 m, 05. VI.2012, Huang Hao leg. (SNUC); Chongqing: 1 ♂, 1 ♀, Simian Mt, Majiagou, 28.583893°N, 106.40411°E, 1134.6 m, 15.X.2017, Zhi – Zhong & Gao leg. (SNUC); 3 ♂♂ Chengkou Coun. East Daba-Shan upper Huang’an–Gou, 31°51’78.5’’N, 109°09’45.9’’E Alt. 2039 m, 22–23.IV.2008, HUANG Hao & XU Wang leg. (SNUC). Comment. The above record from Chongqing represents a new province record.Published as part of Lin, Xiao-Bin, Chen, Xi & Peng, Zhong, 2022, A new species and additional records of Lobrathium Mulsant & Rey (Coleoptera Staphylinidae: Paederinae) from southern China, pp. 241-246 in Zootaxa 5133 (2) on pages 245-246, DOI: 10.11646/zootaxa.5133.2.5, http://zenodo.org/record/652430
Protein adsorption and bacterial adhesion on hybrid starch/polycaprolactone block copolymers
No full textA wide range of block copolymers were made by changing the variables including polymer molecular weight, ratio of PCL to Starch content, di- or tri- block, linear or branched and chemical modifications on hydrophilic blocks with different chemical group. After the synthesis work, fibrinogen adsorption, Salmonella adhesion on 4 different hybrid Starch-PCL-Starch tri block copolymers and 1 poly-(ethylene glycol) (PEG)-PCL-PEG block copolymer coating surfaces were studies while PCL was the control. Besides the protein adsorption and bacterial adhesion assay, atomic force microscopy analysis (AFM), scanning electronic microscopy (SEM) and contact angle measurements were also performed to better understand the polymers’ surface properties. The surfaces were prepared by dissolving block copolymers in organic solvent followed by spin coating technique. Preliminary data showed that all the block copolymers have improved protein and bacteria repellency than PCL. Among all the block copolymers, YZ3-38 (with quaternary ammonium group), MC4-38 (substituted with N, N-diethylaminoethyl ether), MC4-44 (with hydroxypropyl groups) could dramatically improve the protein repellency, and MC4-38 and MC4-44 could significantly reduce the bacterial adhesion, compared with YZ3-14 (without modification on starch end group). MC4-38 even has comparative or better protein and bacteria repellence than PEG/PCL based copolymer (PEG is the most widely utilized protein and bacteria repellency polymer). Moreover, the data on fibrinogen adsorption, Salmonella adhesion showed that the ability to reduce fibrinogen adsorption at the copolymers surface correlates with the ability to reduce Salmonella adhesion. By evaluating the new copolymer’s surface physical, biological properties, this work is able to show the potential protein anti-adsorption and bacteria anti-adhesion properties of the PCL/Starch based copolymer and contribute to the understanding of the connections between protein adsorption, bacterial adhesion, contact angle and surface topography.M.S.Includes bibliographical referencesIncludes vitaby Peng Yua
Trachystolodes bimaculatus
No full textTrachystolodes bimaculatus (Kriesche, 1924) ḆX+ Figures 1–4, 52 Trachystola bimaculata Kriesche, 1924: 285 (type locality: “Montes Mauson, Tonkin, Vietnam ”). Trachystolodes bimaculatus: Breuning, 1943: 188, fig. 1; Breuning, 1961: 319 (catalogue). Type material examined. Holotype: male (MNHUB), Montes Mauson, Tonkin, Vietnam, IV–V, Hans Fruhstorfer leg. Distribution. Vietnam (Tonkin). Remarks. The TITAN Database (Tavakilian & Chevillotte, 2019) shows the holotype of this species was deposited in Senckenberg Deutsches Entomologisches Institut, Müncheberg, Germany (SDEI), when the senior author contacted Mandy Schröter (SDEI) for the photos of holotype, while Mandy Schröter told the senior author that the holotype was not deposited in SDEI, but in Museum für Naturkunde Berlin (MNHUB) based on original paper. Finally, the senior author got the photos of holotype from Bernd Jaeger (MNHUB).Published as part of Huang, Gui-Qiang, Guo, Liang & Liu, Peng-Yu, 2020, A review of the genus Trachystolodes Breuning, 1943 (Coleoptera: Cerambycidae Lamiinae: Lamiini), pp. 49-64 in Zootaxa 4759 (1) on pages 50-51, DOI: 10.11646/zootaxa.4759.1.3, http://zenodo.org/record/373595
pH-sensitive Au–BSA–DOX–FA nanocomposites for combined CT imaging and targeted drug delivery
No full textHe Huang,1 Da-Peng Yang,2 Minghuan Liu,2 Xiangsheng Wang,1 Zhiyong Zhang,1 Guangdong Zhou,1 Wei Liu,1 Yilin Cao,1 Wen Jie Zhang,1 Xiansong Wang1 1Department of Plastic and Reconstructive Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Tissue Engineering, National Tissue Engineering Center of China, Shanghai, 2College of Chemical Engineering and Materials Science, Quanzhou Normal University, Quanzhou, People’s Republic of China Abstract: Albumin-based nanoparticles (NPs) as a drug delivery system have attracted much attention owing to their nontoxicity, non-immunogenicity, great stability and ability to bind to many therapeutic drugs. Herein, bovine serum albumin (BSA) was utilized as a template to prepare Au–BSA core/shell NPs. The outer layer BSA was subsequently conjugated with cis-aconityl doxorubicin (DOX) and folic acid (FA) to create Au–BSA–DOX–FA nanocomposites. A list of characterizations was undertaken to identify the successful conjugation of drug molecules and targeted agents. In vitro cytotoxicity using a cell counting kit-8 (CCK-8) assay indicated that Au–BSA NPs did not display obvious cytotoxicity to MGC-803 and GES-1 cells in the concentration range of 0–100 µg/mL, which can therefore be used as a safe drug delivery carrier. Furthermore, compared with free DOX, Au–BSA–DOX–FA nanocomposites exhibited a pH-sensitive drug release ability and superior antitumor activity in a drug concentration-dependent manner. In vivo computed tomography (CT) imaging experiments showed that Au–BSA–DOX–FA nanocomposites could be used as an efficient and durable CT contrast agent for targeted CT imaging of the folate receptor (FR) overexpressed in cancer tissues. In vivo antitumor experiments demonstrated that Au–BSA–DOX–FA nanocomposites have selective antitumor activity effects on FR-overexpressing tumors and no adverse effects on normal tissues and organs. In conclusion, the Au–BSA–DOX–FA nanocomposite exhibits selective targeting activity, X-ray attenuation activity and pH-sensitive drug release activity. Therefore, it can enhance CT imaging and improve the targeting therapeutic efficacy of FR-overexpressing gastric cancers. Our findings suggest that Au–BSA–DOX–FA nanocomposite is a novel drug delivery carrier and a promising candidate for cancer theranostic applications. Keywords: gold nanoparticles, bovine serum albumin, CT imaging, drug delivery, theranostic
Trachystolodes huangjianbini Huang & Guo & Liu 2020, sp. nov.
No full textTrachystolodes huangjianbini sp. nov. ªḦṆḆX+ Figures 5–7, 8–10, 11–21, 22–28, 52 Description. Male. Body length: 24.0 mm, humeral width: 10.0 mm (2 individuals); holotype (Figs. 5–10, 11–21), body length: 24.0 mm, humeral width: 10.0 mm. Anteclypeus brown (Fig. 8). Mandibles sparsely covered with short white setae and short brown setae on outside of dorso-basal 3/5 and latero-basal 3/5, with several long brown hairs on latero-basal 3/5 (Fig. 8). Labrum sparsely covered with long brown hairs (mainly concentrated at sides), short white setae and short brown setae, with a row of extremely dense golden setae at apex (Fig. 8). Frons sparsely covered with long brown hairs at basal margin (Fig. 8), vertex with several long dark brown pubescence at posterior of upper lobe of eyes. Antennomeres covered with short grayish-brown hairs (hairs gradually dense from basal segments to apical segments, but densest at antennomeres 9 th– 11 th), antennomere 11 th densely with short light grayish-brown hairs at apical 1/3; scape, pedicle, inner sides of antennomere 3 rd sparsely with short dark brown setae; antennomeres 3 rd– 10 th sparsely covered with slightly long and thick brown hairs apically. Pronotum and sides of prothorax sparsely covered with short dark brown setae located in rounded punctuations, pronotum with several long dark brown pubescence near sides of large callus and near base of lateral spines. Black setal spots near elytral middle mushroom-shaped (Fig. 5). Abdomen sparsely covered with semi-erected light brown and dark brown setae, abdominal 5 th segment sparsely with long and thick dark brown hairs at apical 1/3 (slightly dense at apical margin). Apex (except venter) of femora and basal dorsum of tibiae densely covered with short brown setae. Mandibles wide and thickened, nearly as long as frons, nearly smooth at dorso-apical 2/5, wrinkled on outsides of dorso-basal 3/5 and latero-basal 3/5, depressed on latero-basal 3/5. Labrum transversally raised in middle. Frons with a transverse furrow at base and a pair of oblique short furrows at basal sides. Antennae 1.65 times as long as body, relative length of each antennomere as follows: 4.5: 1.0: 4.0: 3.2: 2.9: 2.6: 2.5: 2.0: 1.8: 1.6: 3.0. Pronotum and sides of prothorax sparsely covered with rounded punctuations; posterior of both small calluses closed to anterior of large callus on pronotum, both small calluses sub-rectangular with oblique depression on inner side of dorsum, large callus sub-rectangular, wrinkled and with a mesial longitudinal furrow dorsally, notched apically. Elytra 1.38 times as long as wide at base. Hind wing with Cu vein weak apically, Pc vein reduced into basal and apical parts, basal part short, not connecting with Cu vein and without a cross vein connecting with 1A 3 +2A; 1A 1 and 1A 2 veins dissociative and weak apically, 1A 3 +2A and 3A veins well developed (weak apically) and fused at most of parts of apical 1/2 (Fig. 10). Abdominal 5 th segment sub-truncated apically. Profemora, sides of mid femora and inner sides of hind femora wrinkled. Male terminalia. Dorsum of tergite VIII (Fig. 11) sparsely covered with long and short brown setae (most of setae located at sides and apex), sparsely with long thick dark brown setae at apex and near apical sides, with a piece of longitudinally glabrous section in center of basal 2/3; venter of tergite VIII (Fig. 12) sparsely covered with short brown setae at apical 1/3 (setae mainly concentrated on dark brown section), sparsely with slightly long brown setae at apical 3/4 of sides, sparsely with short dark brown setae at apex, sparsely with long dark brown setae at apex (setae mainly concentrated at apex) and apical 3/4 of sides; disc slightly wider than long, sub-trapezoidal and truncated apically. Venter of sternite VIII (Fig. 12) sparsely covered with long and short brown setae (setae mainly concentrated at apical 1/3), sparsely with long dark brown setae at sides; most of parts of disc membranous, with a piece of longitudinally glabrous section in center, sclerotic section with a triangular notch at apical center. Spiculum gastrale (Figs. 13–15) nearly 2.0 times as long as tergite VIII, stem of spiculum gastrale slightly curved at apical 1/4, strongly curved at basal 1/4, base drop-shaped in profile (Fig. 14), branches of spiculum gastrale less than 0.5 time as long as stem. Tegmen (Figs. 16–18) slightly longer than penis, dorsum of parameres nearly glabrous at basal 1/3, sparsely covered with short brown setae (setae mainly concentrated at apical 1/3) and long thick brown setae (setae mainly concentrated at apical 1/4, longest setae nearly 0.5 time as long as parameres) at apical 2/3 (Fig. 16); venter of parameres sparsely with short fine brown setae at basal 2/3 (setae mainly concentrated at base), sparsely with long thick brown setae on apical 1/3, each lobe rounded apically and longitudinally depressed at outer half of ventro-basal 1/2 (Fig. 18); phallobase nearly 2.6 times as long as parameres, expanded at apical 2/5 and gradually constricted to base, then curved near basal 1/5 (Fig. 17), both struts of anterior tegminal strut separated and only connected through membrane (Figs. 16 & 18). Penis abruptly curved at basal 2/5 (Fig. 20), dorsal plate shorter than ventral plate and rounded apically (Fig. 19), ventral plate wider than dorsal plate near apex (Fig. 20), sub-truncated apically (Fig. 21); dorsal struts about 0.5 time as long as entire penis and rounded apically, apex of dorsal struts slightly expanded towards inner sides (Fig. 19), outer side of apical margin of dorsal struts slightly folded towards dorsum (Fig. 20). Variation. The black setal spots near elytral middle securiform in male paratype. Female. Paratype (Figs. 22–28), similar to male, but body length: 23.5 mm, humeral width: 10.0 mm. The black setal spots near elytral middle converse “V” shaped (Figs. 22 & 25). Antennae 1.33 times as long as body, relative length of each antennomere as follows: 3.4: 0.6: 2.6: 2.0: 1.7: 1.4: 1.3: 1.2: 1.1: 1.1: 1.6. Elytra 1.46 times as long as wide at base. Hind wing with 1A 3 +2A vein connecting with a very short cross vein near middle (Fig. 28). Abdominal 5 th segment notched apically. tographs by Peng-Yu Liu on 2 July 2019); 28. right hind wing (A: anal, C u: cubitus, P c: post cubitus; red arrows indicate broken sections); 22, 25 & 28. dorsal view, 23, 26 & 27. lateral view, 24. ventral view. Scale bars: 5 mm. Diagnosis. This new species can be distinctly distinguished from T. bimaculatus and T. tonkinensis by the black setal spots near elytral middle mushroom-shaped or securiform (drop-shaped in T. bimaculatus, sub-rectangular and bordered with short light yellowish brown setae in T. tonkinensis) in males and converse “V” shaped (sub-rectangular and bordered with short light yellowish brown hairs in T. tonkinensis) in females, apex (except venter) of femora and basal dorsum of tibiae densely covered with short brown hairs (with short golden yellow hairs in T. bimaculatus and T. tonkinensis), the three calluses on pronotum large (compare with pronotum, small in T. bimaculatus and T. tonkinensis); tergite VIII truncated apically (rounded apically in T. tonkinensis), stem of spiculum gastrale strongly curved at basal 1/4, drop-shaped basally in profile [stem of spiculum gastrale curved (not strongly) at basal 1/4 and hook-like basally in profile in T. tonkinensis], parameres long (compare with width, short in T. tonkinensis) and apical 1/2 narrow (compare with basal width, wide in T. tonkinensis), the interval between both parameres gradually expanded from base to apex (sub-paralleled in T. tonkinensis), both struts of the anterior tegminal strut separated (combined in T. tonkinensis) in males. Type material examined. CHINA: Fujian. Holotype: male (LPSNU ex CJBH), Mountain temple, Gaoping village, Mangdang mountain, Nanping city, 118°5’24” E, 26°37’43” N, alt. 923 m, 21.V.2019, Jian-Bin Huang leg. Paratypes: 1 female (LPSNU ex CPYL), Daopaiyan, Zhongxian town, Youxi county, Sanming city, 2.VII.2019, Chao-Ming Chen leg.; 1 male (YZU), Yichao village, Mangdang town, Yanping district, Nanping city, 14. VI.1983, Bing-Rong Chen leg. Etymology. This new species is dedicated to Mr. Jian-Bin Huang (ª Ḧ «), who collected the holotype and is a good friend of the authors. Distribution. Only known from type locality Fujian, China. Remarks. Figures 5, 7, 22 and 24 show the elytra of this new species separated from each other at apex, which was caused by the senior author dissecting the hind wings, the elytra actually are not separated from each other at apex in natural condition; photographs used in Figs. 25–27 were taken by the third author outdoors after collecting the specimen instead of in situ.Published as part of Huang, Gui-Qiang, Guo, Liang & Liu, Peng-Yu, 2020, A review of the genus Trachystolodes Breuning, 1943 (Coleoptera: Cerambycidae Lamiinae: Lamiini), pp. 49-64 in Zootaxa 4759 (1) on pages 52-56, DOI: 10.11646/zootaxa.4759.1.3, http://zenodo.org/record/373595
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