2,128 research outputs found
Diffusion-weighted imaging parameters to track success of pyogenic brain abscess therapy
No full textPseudotalopia taiwanensis Chen 2006
No full textPseudotalopia taiwanensis (Chen, 2006) nov. comb. (Figures 45–47) 2006 Gibbula taiwanensis nov. spec.—Chen: p. 21, fig. 1. 2007 Gibbula taiwanensis —Chen & Fu: p. 67, fig. 2. Material. Anda 3 (1 adult); Tiep 2 (1 damaged specimen); Tiep 3 (1 juvenile). Characterization. Domed, thick trochiform shell with narrow spiral ribs, a well-developed basal keel and color blotches on a pinkish background color, H 5.9 mm, W 7.3 mm; protoconch glossy white, DN 0.08–0.09 mm; P/T boundary poorly defined at 1.2 whorls; inner lip white, glossy, columellar lip twisted; deep, narrow umbilicus with spiral cord and weak lamellae. Distribution. Hitherto the species has only been reported from waters off Taiwan, on sandy bottoms, 150–200 m depth (Chen 2006). Remarks. Chen (2006) found a specimen of this species inside the stomach of a starfish, so apparently this species is predated on by starfishes. The deep-water Indo-West Pacific species currently assigned to Gibbula are likely unrelated to that European genus of intertidal species (STW unpub. genetic data). We tentatively assign ‘ Gibbula’ taiwanensis to the deep-sea genus Pseudotalopia based on preliminary genetic data (STW). Molecular data show that Pseudotalopia should be assigned to the trochid subfamily Cantharidinae (Williams 2012).Published as part of Helwerda, Renate Ariane, Wesselingh, Frank Pieter & Williams, Suzanne T., 2014, On some Vetigastropoda (Mollusca, Gastropoda) from the Plio-Pleistocene of the Philippines with descriptions of three new species, pp. 101-135 in Zootaxa 3755 (2) on pages 119-121, DOI: 10.11646/zootaxa.3755.2.1, http://zenodo.org/record/25095
Callogobius nigromarginatus Chen and Shao 2000
No full text269. Callogobius nigromarginatus Chen and Shao, 2000:459 Holotype: ASIZP 57693 (31.7), coastal waters off Keehui, Taitung County, southeastern, Taiwan, 4 m, muddy and sandy bottom of subtidal reef flats, 9 Mar. 1994, coll. J. –P. Chen. Paratype: ASIZP 57694 (2, 17.8–23.9), same as holotype; BPBM 37304 (1, 23.9), same as holotype; ASIZP 57695 (2, 19.5–27.4), Chengkung, Taitung county, southeastern Taiwan, 10 m, muddy and sandy bottom similar to that of type locality of holotype, 25 Jan. 1994, coll. J. –P. Chen.Published as part of Ho, Hsuan-Ching & Shao, Kwang-Tsao, 2011, 2957, pp. 1-74 in Zootaxa 2957 on page 5
Measurement of volumetric lesion load in multiple sclerosis: moving from normal- to dirty-appearing white matter
No full textMandy Chen drawing anime at the Utah Asian Festival
No full textColor photograph of anime artist Mandy Chen drawing at the Utah Asian Festival in Sandy, UT
Saussurea pagriensis Y. S. Chen 2014, sp. nov.
No full text4. Saussurea pagriensis Y. S. Chen, sp. nov. (Fig. 4, 8C & 8D) Type:— CHINA. Xizang: Yadong, Pagri, mountain between border of China and Bhutan, scree slope or sandy meadows, 27°37’ N, 89°07’ E, 4600–4870 m, 25 August 2013, FLPH Tibet Exped. 13-2141 (holotype PE; isotypes PE). Herbs perennial, usually stemless or shortly stemmed up to 5 cm high, caespitose. Caudex stout, usually numerously branched. Rosette leaves sessile, linear-lanceolate, 2–9 × 0.3–1 cm, abaxially greyish white and densely tomentosesericeous, adaxially green and sparsely arachnoid, base sheathing, margin pinnately dentate and revolute, apex acute, midvein distinct. Capitula solitary, in center of leaf rosette or terminal on stem, sessile. Involucre campanulate, 1.3–2 cm in diameter. Phyllaries in ca. 5 rows, glabrous to sparsely arachnoid, apex obtuse to acute; outer phyllaries narrowly ovate-triangular, 8–14 × 3–5 mm, basal part green, apical part and margin blackish purple; middle and inner phyllaries narrowly ovate-triangular to narrowly elliptic, 11–13 × 2–4 mm, basal part pale yellow, apical part blackish purple. Receptacle with dense bristles, straw-color, 4–6 mm long. Corolla purplish, 1.5–1.7 cm long, tube 7–8 mm long, limb 8–9 mm long, lobes ca. 4 mm long. Anther ca. 6 mm long, tails lanate, ca. 1 mm long. Achene dark brown, conic, ca. 2.5 mm long, glabrous, ribbed, apex shallowly crowned. Pappus in 2 rows, greyish white; outer bristles 7–8 mm long, plumose; inner bristles 11–12 mm long, plumose. Distribution and habitat: — Saussurea pagriensis occurs in northern Bhutan and Yadong, Xizang, China (which is adjacent to Bhutan). It grows on alpine scree slope or sandy meadows at altitudes of 4600–4870 m. Phenology:—Flowering and fruiting from August to October. Etymology: —The specific epithet is derived from the type locality name, Pagri, a frontier town in Yadong, Xizang. Additional specimens examined (paratypes): — BHUTAN. Upper Mo Chu District: [Gasa], south slope of Yale La, 27°47’ N, 89°27’ E, dry unstable scree, 4780 m, 3 October 1984, I. W. J . Sinclair & D. G. Long 5498 (E, K). Discussion:— Saussurea pagriensis belongs to S. subgen. Saussurea sect. Strictae because of its pinnately dentate leaves and solitary capitula. This species is distinct in its outer pappus plumose. Saussurea pagriensis is somewhat similar to S. purpurascens Y. L. Chen & S. Yun Liang (Chen et al. 1981: 105) and S. taraxacifolia (Lindley ex Royle 1835: 251) Wallich ex Candolle (1838: 532) in its leaf shape. However S. pagriensis is distinct in its usually stemless habit, caudex numerous branched, leaves sessile and linear-lanceolate, margin denate, capitula usually smaller, outer pappus plumose. A comparison of S. pagriensis, S. purpurascens and S. taraxacifolia is given in Table 4.Published as part of Chen, You-Sheng, 2014, Six new species of Saussurea (Asteraceae) from eastern Himalaya, pp. 191-206 in Phytotaxa 177 (4) on page 197, DOI: 10.11646/phytotaxa.177.4.1, http://zenodo.org/record/514474
Scolelepis (Scolelepis) globosa Wu & Chen 1964
No full textRemarks on Scolelepis (Scolelepis) globosa Wu & Chen, 1964 Scolelepis (Scolelepis) globosa Wu & Chen, 1964 was originally described as Scolelepis (Nerinides) globosa Wu & Chen, 1964, based on material from the intertidal flat around Zhoushan archipelago in the East China Sea. After that, there were no additional reports of the species. According to the original description, the species is characterized by globular expansions at the bases of the palps. It also can be clearly separated from other Chinese Scolelepis species by the combination of the characters of the presence of tridentate hooded hooks and occipital tentacle. Therefore, we consider it to be a valid species, but unfortunately neither the type materials nor other representative samples are available for examination. Although the validity of Scolelepis (Scolelepis) globosa Wu & Chen, 1964 is certain, the subgeneric arrangement of the species is confusing. Wu & Chen (1964) placed the species in the subgenus Nerinides without any detailed explanation. The original description of the species lacks the morphological characters of the neuropodial postsetal lamellae in the posterior part of body, which is the most important taxonomic character for the subgenus Nerinides according to Pettibone (1963). Detailed information on the shapes of the neuropodial postsetal lamellae in this species is obviously needed. The concept of the division of the genus Scolelepis into the subgenera Scolelepis and Parascolelepis has been followed by various subsequent authors (e.g., Imajima 1992; Blake 1996; Delgado-Blas 2006). The former is characterized by having uni-, bi- or tridentate hooded hooks, while the latter has multidentate hooded hooks. In order to avoid confusion, Scolelepis (Nerinides) globosa Wu & Chen, 1964 should be cited as Scolelepis (Scolelepis) globosa Wu & Chen, 1964 in subsequent studies.Published as part of Zhou, Jin, Ji, Weiwei & Li, Xinzheng, 2009, A new species of Scolelepis (Polychaeta: Spionidae) from sandy beaches in China, with a review of Chinese Scolelepis species, pp. 37-49 in Zootaxa 2236 on page 46, DOI: 10.5281/zenodo.19043
Sandy soils in south central coastal Vietnam: their origin, constraints and management
Get PDFIn Vietnam, sandy soils are distributed mainly in the coastal central provinces where they occupy 337,768 ha comprising 63 % of the nation’s sandy soils, and they are also important to regional economic growth where more than 10 million people are living i.e.14 % of the Vietnamese population. The sandy materials in the central coastal Vietnam originate from mostly in situ weathering of granite although aeolian sediments are parent materials for sandy soils also. Sandy soils have a wide range of limiting factors for agricultural production, including nutrient deficiencies, acidity, low water holding capacity and wind erosion risk (on coastal dunal sands). Although there are soil fertility constraints to the use of sandy soils in Vietnam, 79,076 ha has been utilized in agriculture. Developing integrated nutrient management practices are needed to improve soil physical, chemical and biological fertilities of sandy soils. For example, systematic use of farmyard manures, crop residues, green manures, and alley cropping need to be considered. Developing integrated nutrient management practices also need to address environmental considerations by matching nutrient applications to crop needs and amending soils to minimise nutrient losses to water. Developing new soil management technologies (such as use of biochar, slow release fertilisers and minimum tillage) is also important for sustainable management of sandy soils in Vietnam
Saussurea bhutanensis Y. S. Chen 2014, sp. nov.
No full text5. Saussurea bhutanensis Y. S. Chen, sp. nov. (Fig. 5, 9A & 9B) Type:— CHINA. Xizang: Yadong, Pagri, mountains between border of China and Bhutan, 27°37’ N, 89°07’ E, sandy meadows, 4870 m, 25 August 2013, FLPH Tibet Exped.13-2131 (holotype PE; isotypes PE). Herbs 1–4 cm tall, perennial, stemless, caespitose. Caudex 2–3 cm in diam., usually much branched. Rosette leaves sessile, linear, 10–25 × 1–1.5 mm, abaxially greyish white and densely tomentose-sericeous, adaxially green, shiny, and glabrous, base enlarged, sheathing, and white villous, margin entire and revolute, apex acute. Uppermost leaves merging into phyllaries, supporting capitula. Capitula solitary, in center of leaf rosette or terminal on stem, sessile, concealed by villous hairs. Involucre campanulate, 1–1.6 cm in diam. Phyllaries in ca. 6 rows, apex acuminate to caudate; outer phyllaries narrowly ovate-triangular, 14–16 × 3–4 mm, basal part dark green, apical part greenish, sparsely villous, and reflexed; middle and inner phyllaries narrowly ovate-triangular to narrowly elliptic-linear, 11–13 × ca. 2 mm, basal part pale yellow, apical part blackish purple, villous, and reflexed. Receptacle bristles very few, 1–2 mm long. Corolla purplish, 1.3–1.5 cm long, tube 7–8 mm long, limb 6.5–8 mm long, lobes 3.5–4 mm long. Achene dark brown, conic, ca. 3 mm long, glabrous. Pappus in 2 rows; outer bristles white, 2–3 mm long, scabrid; inner bristles pale brown, 9–10 mm long, plumose. Distribution and habitat: — Saussurea bhutanensis occurs in northern Bhutan and adjacent border of Yadong, Xizang, China. It grows on alpine sandy meadows (including Saussurea, Aster, Primula, Arenaria, Gentiana, Swertia, Cyananthus, Saxifraga and Delphinium species), alpine scree or limestones at altitudes of 4500–4900 m. Phenology:—Flowering and fruiting from August to October. Etymology: —The specific epithet is derived from its main distribution area, Bhutan. Additional specimens examined (paratypes): — BHUTAN. [Bumthang district]: Tolegang, Tsampa, steep open hillside, 4720 m, 2 October 1949, F . Ludlow, G. Sherriff & J. H. Hicks 19784 (BM, E); [Wangdi district]: Wangdue-Phodrang, Thampe La, limestone, 27°43’ N, 90°18’ E, 4500–4600 m, 28 September 2000, G. & S . Miehe 00-421-01 (E). Discussion:— Saussurea bhutanensis belongs to S. subgen. Saussurea sect. Lagurostemon on account of its leaf blade being linear, entire, grasslike, and the capitula solitary, 1–1.6 cm in diameter. Grierson & Springate (2001) reported one specimen from Bhutan (F. Ludlow, G. Sherriff & J. H. Hicks 19784) that is related to Saussurea columnaris Handel-Mazzetti (1937: 652), but they noted this specimen is different from the typical S. columnaris in its receptacle naked, achene glandular-stipitate above and habit usually stemless. This kind of specimen was also found from the Tibetean border with Bhutan (FLPH Tibet Exped.13-2131) by the present author in 2013. But the present author found its receptacle is not entirely naked but with few short bristles 1–2 mm long, achenes glabrous, leaves 1–2.5 cm long, phyllaries usually narrower and apex acuminate, capitula concealed by dense villous hairs. Typical specimens of S. columnaris from Yunnan are different in the receptacle bristles ca. 7 mm long and plants usually stemmed, leaves 2–7 cm long, phyllaries usually broader and apex acute, capitula not concealed by villous hairs. Saussurea bhutanensis is also similar to S. durgae Jeffrey & Srivastava (1997: 235) in its caespitose habit and linear grassy leaves, but S. bhutanensis differs in its leaves adaxially green, shiny, and glabrous, capitula concealed by villous hairs, and corolla purplish, whereas S. durgae differs in its leaves densely clothed with greyish white wooly hairs on both surfaces, capitula not concealed by villous hairs, and corolla pink. A comparison of S. bhutanensis, S. columnaris and S. durgae is given in Table 5.Published as part of Chen, You-Sheng, 2014, Six new species of Saussurea (Asteraceae) from eastern Himalaya, pp. 191-206 in Phytotaxa 177 (4) on page 199, DOI: 10.11646/phytotaxa.177.4.1, http://zenodo.org/record/514474
The Challenges and Opportunities for Cataloging in Today's Changing Metadata Environment
No full textSandy Chen is from the New College of Florida, Sarasota.What are the challenges and opportunities for cataloging and authority control in today’s library environment? Given the size of growing collections with diverse materials and a variety of metadata schemes, how can catalogers achieve simplicity and interoperability for users and staff? We will review a number of issues such as the death of MARC and how XML can give new life to MARC. Similarly, we will review how the functions of METS, MODS, FRBR and FAST can help meet the goals of simplicity and interoperability
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