85,320 research outputs found
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Extracting Boer-Mulders functions from p+D Drell-Yan processes
No full textWe extract the Boer- Mulders functions of valence and sea quarks in the proton from unpolarized p + D Drell- Yan data measured by the FNAL E866 Collaboration. Using these Boer- Mulders functions, we calculate the cos2 phi asymmetries in unpolarized pp Drell- Yan processes, both for the FNAL E866/ NuSea and the BNL Relativistic Heavy Ion Collider experiments. We also estimate the cos2 phi asymmetries in the unpolarized p (P) over bar Drell- Yan processes at GSI.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)37ARTICLE5null7
The politics of fashion: perceptions of power in female clothing and ornamentation as reflected in the sixteenth-century Chinese novel Jin Ping Mei
Get PDFThis thesis examines issues of female power and influence in sixteenth-century China focusing on how women and their roles were perceived in the changing social environment of the mid-late Ming dynasty. Using aspects of a New Historicist approach, information from contemporary literary and historical sources are analysed alongside each other. With its emphasis on the lives of women and preoccupation with the description of material objects, the late Ming novel Jin Ping Mei forms an important element in the thesis. China in the sixteenth century saw expanding urbanisation, the emergence of a new wealthy merchant class, increasing visibility of women and a questioning of traditional morality. Fashion consciousness, as one of the most conspicuous aspects of the new material culture, is a possible indicator of these trends. Traditional Western theories contend that fashion began in the particular context of Renaissance Europe. However, this study argues that a similar fashion awareness existed in China too, and was manifested in a competitive striving for social status, in this case specifically among women. In contrast to previous studies which downplayed the impact women had on defining traditional Chinese culture, this thesis demonstrates how women and their sartorial choices began to redefine the boundaries of material culture, influencing literati discourse which, in turn, re- influenced female behaviour
Xiphidiopsis (Xiphidiopsis) dichotoma Jin 2020, sp. n.
No full text28) <i>Xiphidiopsis</i> (<i>Xiphidiopsis</i>) <i>dichotoma</i> Jin sp. n. <p>Holotype ♂ (right front and middle leg, both antennae lost): P.I., CAMARINES/ SUR, Mt., Iriga / 500–600m, 6.IV.62; H.M. Torrevillas / Collector / BISHOP</p> <p>Paratype ♀ (left front and middle leg, both antennae lost): Labeled as Holotype</p> <p> <b>Diagnosis.</b> General morphology typical of the genus. Male last abdominal tergite forming a single (unpaired) middle process, thick, bend strongly downward, apical part enlarged into 2 asymmetric triangular lobes, left one larger than right one; cerci complicated, asymmetry, a thin branch lobe and a broad apical lobe (Fig. 14a, c, d), subgenital plate short, posterior margin slightly projected, with comparatively long styli (Fig. 14e).</p> <p> Female 9 th abdominal tergite without enlarged lateral posterior margin, subgenital plate elongate, narrowing toward end, posterior margin with a small notch in middle (Fig. 14f), ovipositor thin sword shape, long and nearly straight, ventral valve smooth, without apical hook.</p> <p> <b>Measurement</b> (mm). Body: ♂ 10.2, ♀ 13.0; Pronotum: ♂ 3.8, ♀ 3.5; Tegmina: ♂ 18.7, ♀ 20.8; Hind femora: ♂ 9.8, ♀ 11.1; Ovipositor: 9.6.</p> <p> <b>Comparison.</b> Very close to <i>X.</i> (<i>X.</i>) <i>monstrosa</i> Karny, 1924 from southern Sumatera, but differs in detailed features of male last tergite and cerci. The obtuse triangular lobe of female subgenital plate also is similar to <i>X.</i> (<i>X.</i>) <i>bicarinata</i> Jin <b>sp. n.</b> from Philippines, but is much shorter.</p> <p> <b>Etymology.</b> Species name refers to the shape of apical part of male last tergite forming 2 asymmetric triangular lobules.</p>Published as part of <i>Jin, Xingbao, Liu, Xianwei & Wang, Hanqiang, 2020, New taxa of the tribe Meconematini from South-Pacific and Indo-Malayan Regions (Orthoptera, Tettigoniidae, Meconematinae), pp. 1-53 in Zootaxa 4772 (1)</i> on page 22, DOI: 10.11646/zootaxa.4772.1.1, <a href="http://zenodo.org/record/3814111">http://zenodo.org/record/3814111</a>
Vitamin D-mediated suppression of mammary tumorigenesis and mechanism of action:
No full textNumerous preclinical, epidemiological and clinical studies with vitamin D and analogs have suggested the benefits of vitamin D and analogs for prevention and treatment of cancer. However, the hypercalcemic effects have limited the use of 1alpha,25(OH)2D3, the hormonally active form of vitamin D. Gemini vitamin D analogs with a unique structure of two six-carbon chains have shown activity in inhibiting tumor growth of colon cancer cells without inducing hypercalcemia. However, the molecular mechanism of Gemini vitamin D analogs has not been studied. Here, we have investigated the effects of novel Gemini vitamin D analogs on suppressing mammary tumorigenesis and the mechanism of action in breast cancer in vitro and in vivo.
We found that Gemini vitamin D analogs exhibited better inhibition of cell growth than 1alpha,25(OH)2D3 and regulated the cell proliferating related markers including the cyclin dependent kinase inhibitor, p21 and insulin-like growth factor binding protein 3 (IGFBP-3) in MCF10AT1 human breast epithelial cells. The transforming growth factor beta (TGF-beta) superfamily has been suggested to cross-talk with vitamin D signaling, and we determined that Gemini vitamin D analog Ro3582 activated Smads (Smad1/5), down-stream mediators of bone morphogenetic protein (BMP) signaling. In the study of upstream signaling pathways, we found that Ras/PKC alpha was involved in Smad activation and cell growth inhibition by Ro3582, suggesting that the Ras/PKC alpha-Smad signaling pathway may mediate the inhibition of cell proliferation by Gemini vitamin D analog Ro3582 in MCF10 human breast epithelial cells.
Gemini vitamin D analogs exerted significant in vivo suppression of mammary tumorigenesis without inducing hypercalcemic toxicity in three different animal models: 1) N-methyl-N-nitrosourea (NMU)-induced estrogen receptor (ER) positive breast cancer, 2) ER-negative MCF10DCIS xenografts, and 3) an MMTV-her2/neu transgenic mouse model. These results suggest that Gemini vitamin D analogs be used as potent agents in the prevention and/or inhibition of different subtypes of breast cancers including luminal, Her2 positive and basal-like breast cancer.
In conclusion, Gemini vitamin D analogs regulate Smad signaling via the Ras/PKC alpha pathway, and may be potent agents for the prevention and treatment of breast cancer without calcemic toxicity.Ph.D.Includes bibliographical references (p. 78-97)by Hong Jin Le
Segregation of <i>S-RNases</i> in selfed and crossed progeny of ‘Jin Zhui’.
No full text<p>A. Segregation analysis of <i>S<sub>21</sub></i>- and <i>S<sub>34</sub>-RNases</i> in selfed progeny of ‘Jin Zhui’. Lanes 1–94 represent a progeny population of 94 individuals. B. Segregation analysis of <i>S<sub>21</sub>-</i> and <i>S<sub>34</sub>-RNases</i> in crossed progeny between ‘Ya Li’ and ‘Jin Zhui’. Lanes 1–59 represents a progeny population of 59 individuals. C. Segregation analysis of <i>S</i>-alleles in crossed progeny between ‘Han Xiang’ and ‘Jin Zhui’. Lanes 1–45 represent a progeny population of 45 individuals. JZ, Jin Zhui; HX, Han Xiang. D. Segregation analysis of <i>S</i>-alleles in crossed progeny between ‘Jin Zhui’ and ‘Jin Feng’. Lanes 1–31 represent a progeny population of 31 individuals. JZ, Jin Zhui; JF, Jin Feng. E. Average numbers of seeds per fruit from selfed and crossed progeny of ‘Jin Zhui’. JZ, Jin Zhui; YL, Ya Li; HH, Han Hong.</p
Gastrochilus tsii Q. Liu, D. P. Ye & X. H. Jin
No full textGastrochilus tsii Q. Liu, D.P. Ye & X.H. Jin, sp nov. (ằkfiffi±) (Figure 3–4) Type:— CHINA. Yunnan Province: Zhenyuan County, Jiujia town, Qianjiazhai Village, Ailaoshan National Nature Reserve. Monsoon evergreen broad-leaved forest, 2300 m, epiphytic on tree trunks, 09 May 2016, Qiang Liu 354 (holotype: HITBC0056888!). Morphologically, it is similar to G. distichus (Lindley 1858: 36) Kuntze (1891: 661) and G. pseudodistichus (King & Pantling 1896: 341) Schlechter (1913: 315) by having the pendulous and branched stem, but differs from G. distichus by having a sub-triangular epichile without conic calli at base—from G. pseudodistichus by having oblong-elliptic sepals, and sub-triangular epichile wider than hypochile. Description:— Epiphytic herbs. Stem pendulous, 15–20 cm long, with 0.5–0.7 cm internodes, slender, often branched with tiny red-purple spots. Leaves alternate, distichous, ovate, 2.2–1.3 × 0.3–0.5 cm; apex acuminate and unequally 2-lobed with one awn. Inflorescences several, subumbellate, 3–4-flowered; peduncle 0.9–1.1 cm, slender, upper part enlarged, lower part with 2 sheaths; floral bracts ovate-lanceolate, 1.0– 1.2 mm; pedicel and ovary 0.3–0.4 cm. Flower yellow-green, sepals and petals with reddish brown spots. Dorsal sepal oblong-elliptic, concave, 3.2–3.8 × 2.0– 2.2 mm, apex acute. Lateral sepals similar to dorsal sepal, 3.2–4.2 × 2.0– 2.4 mm, apex acute; petals ovate, 3.0–3.2 × 1.5–1.6 mm, apex obtuse. Lip with an epichile and a saccate hypochile; epichile sub-triangular, 2.8–3.0 × 5.0– 5.5 mm, fleshy, adaxially glabrous, apex rounded; hypochile nearly cupular, mouth with lateral purple stripes, sac with reddish brown spots on the underside, 4.0– 4.5 mm tall, 4.0– 4.2 mm in diameter. Column stout with purple spots, ca. 1.2 mm; rostellum bilobed acuminate at the apex; pollinia 2, subglobose, ca. 0.3 mm in diameter; stipe elongate, ca. 0.7 mm; viscidium elliptic, thick and bilobed; anther cap galeate with a recurved–acuminate apex, 1.6 × 1.4mm. Capsules cylindrical, with 3 ridges, 2.0–2.2 × 0.7–0.8 cm. Distribution and ecology:— The new species was found in Zhenyuan County, Dali Autonomous Prefecture, Yunnan Province, China, and Darjeeling state, India. Gastrochilus tsii grows on the tree trunks or rocks at altitudes from 2150 to 2300 m in Monsoon evergreen broad-leaved forest. Gastrochilus tsii was observed flowering from June to July in the wild. Etymology:— The species epithet honors the late Prof. Tsi zhanhuo, (1936–2001), who devoted all his life to study Chinese orchids. Taxonomic discussion:— After checking the specimens of Gastrochilus spp. kept at K, we found one specimen (voucher J.S. Gamble 8006) with drawing, collected by J.S. Gamble in 1879, from Darjeeling state, India (Figure 3G), identified as the G. distichus. It is easily distinguished from G. distichus by the illustrated flower characters. During our field expeditions in Yunnan province, we collected the fresh materials and the vegetative and floral characteristics are in congruity with the illustration of the Gamble specimen.Published as part of Liu, Qiang, Wu, Xun-Feng, Zhou, Shi-Shun, Li, Jian-Wu & Jin, Xiao-Hua, 2023, New species and record of Gastrochilus (Orchidaceae, Aeridinae) from China and Laos, pp. 210-224 in Phytotaxa 585 (3) on pages 211-216, DOI: 10.11646/phytotaxa.585.3.3, http://zenodo.org/record/769080
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Gastrochilus wenshanensis Q. Liu, D. P. Ye & X. H. Jin
No full textGastrochilus wenshanensis Q. Liu, D.P. Ye & X.H. Jin, sp nov. (Ẋψfiffi±) (Figure 4–5) Type:— CHINA. Yunnan Province: Wenshan Zhuang-Miao Autonomous Prefecture, Malipo County, Xiajinchang Village, limestone forest, 2155 m, 16 June 2016, Qiang Liu 342 (holotype: HITBC0056874!). Morphologically, it is similar to Gastrochilus tsii for having a pendulous and branched stem and a fleshy and glabrous epichile, but differs from the latter by the yellow-green flowers, petals oblanceolate with an acute apex, the slightly erose margin of the epichile, and the absence of purple stripes along the margin of the hypochile. Description:— Epiphytic herbs. Stem pendulous, 12–18 cm long, with 0.4–0.6 cm internodes, slender, often branched. Leaves alternate, distichous, ovate, 1.3–1.6 × 0.4–0.7 cm; apex acuminate and unequally 2-lobed with 1 awn (young leaf). Inflorescences several, opposite to leaves, subumbellate, 4–6-flowered; peduncle 1.6–2.7 cm long, slender, upper part enlarged, lower part with 2 sheaths; floral bracts ovate-lanceolate, ca. 1.5 mm long; pedicel and ovary 3.2–4.0 mm long. Flowers yellow-green. Dorsal sepal oblong-elliptic, concave, 3.0–3.2 × 2.0– 2.2 mm, apex acute. Lateral sepals similar to dorsal sepal, 3.8–4.0 × 2.0– 2.2 mm, apex acute. Petals oblanceolate, 3.5–3.8 × 1.6–1.8 mm, apex acute. Lip with an epichile and a saccate hypochile; epichile sub-triangular, 2.5–2.8 × 5.0– 5.2 mm, fleshy, yellowish, adaxially glabrous, margin slightly erose, apex rounded; hypochile nearly cupular, with 3-ridges externally, 4.0– 4.5 mm tall, 4.0– 4.2 mm in diameter. Column stout with purple spots, ca. 1.0 mm; rostellum bilobed with acuminate apex; pollinia 2, subglobose, ca. 0.3 mm in diameter; stipe elongate, ca. 1.2 mm; viscidium elliptic, thick and bilobed; anther cap galeate with recurved–acuminate apex, 1.5 × 1.2 mm; Capsules not seen. Distribution and ecology:— This new species occurs in Malipo County, Yunnan Province, China. It grows on the rock at altitudes from 2055 to 2155 m in the limestone broad-leaved forests. Gastrochilus wenshanensis was observed flowering from June to July in the wild. Etymology:—Referring to the type locality, Wenshan Zhuang-Miao Autonomous Prefecture, Yunnan Province, China. Additional specimens examined(paratype):— CHINA: Yunnan Province: Wenshan MiaoAutonomous Prefecture, Malipo County, Xiajinchang Village, limestone forest, 2055 m, 16 June 2016, Qiang Liu 375 (HITBC 0056905!). Taxonomic discussion:— According to the characteristic of the long and pendulous stem, G. wenshanensis can be placed in section Microphyllae (Tsi 1996). However, some species were isolated from section Microphyllae by having dense hairs on the epichile, and clustered into clade V (Liu et al. 2019). While, other species with glabrous epichile were clustered into clade IV and new species of G. tsii and G. wenshenensis should be placed in this clade.Published as part of Liu, Qiang, Wu, Xun-Feng, Zhou, Shi-Shun, Li, Jian-Wu & Jin, Xiao-Hua, 2023, New species and record of Gastrochilus (Orchidaceae, Aeridinae) from China and Laos, pp. 210-224 in Phytotaxa 585 (3) on page 216, DOI: 10.11646/phytotaxa.585.3.3, http://zenodo.org/record/769080
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