172,809 research outputs found
Paratanytarsus sinensis Guha & Chaudhuri 1984
No full textParatanytarsus sinensis Guha & Chaudhuri 1984 Paratanytarsus sinensis Guha & Chaudhuri 1984: 25 (Figs. 2 a–c) Diagnostic characters: Frontal tubercle absent. Anal point short with bubble like crest. Superior volsella circular; digitus beaklike, barely extending past median margin of superior volsella; median volsella club shaped and with short lamellae on distal half. The characters used in this paper are based on those of Guha & Chaudhuri (1984). Distribution: China: Xizang Autonomic Region (Oriental Region).Published as part of Wang, Xinhua & Guo, Yuhong, 2005, Paratanytarsus Thienemann & Bause from China (Diptera: Chironomidae: Tanytarsini), pp. 1-15 in Zootaxa 940 on page 5, DOI: 10.5281/zenodo.17116
Thalamoporella kharinadiensis Guha & Gopikrishna 2004
No full textThalamoporella kharinadiensis Guha & Gopikrishna, 2004 (Fig. 11, Table 8) Thalamoporella kharinadiensis Guha & Gopikrishna, 2004: 23, figs 20, 21. Material examined. GIS/B 0231–0270. Yellowish limestone west of Haripar, Kharinadi Formation, lower Miocene (Aquitanian), 23°22’08’’ N, 68° 49’40’’ E, elevation 20 m, 14 January 2011, DST project, New Delhi. Description. Colony erect, bilaminar. Autozooids arranged quincuncially in alternating longitudinal series, rectangular, bordered by indistinct, raised, smooth autozooidal borders. Orifices subcircular, a little wider than long, strongly arched distally with a concave proximal margin (Fig. 11A, B). Cryptocyst shallow, smooth, gently sloping towards opesiular region. Adoral area narrow lacking tubercles. Opesiules large, rounded, unequal, deeply sunken, adjacent to lateral walls proximal to orifice. Avicularia at bifurcation of rows, c. 75% of autozooidal length, vicarious, elongate, straight, with rounded rostrum directed distally; foramen somewhat elongate-pyriform in eroded present material, c. 80% of avicularian length, cryptocyst little preserved proximally, smooth (Fig. 11B). Ovicells not observed. Remarks. The present material agrees with T. kharinadiensis Guha & Gopikrishna, 2004, but the preservation is poor, reflected in the details of the avicularium and apparent absence of pores in the cryptocyst. Additionally, most of the autozooids in a colony show anomalous growth, i.e. incomplete cryptocysts, that might reflect growth in a low pH setting.Published as part of Sonar, Mohan A., Pawar, Ravi V. & Wayal, Dyaneshwar V., 2022, Fossil Thalamoporellidae (Bryozoa) from Paleogene-Neogene sediments of western Kachchh, Gujarat, India, pp. 251-274 in Zootaxa 5104 (2) on page 264, DOI: 10.11646/zootaxa.5104.2.5, http://zenodo.org/record/628083
Antropora gadhavii Guha & Gopikrishna 2005
No full textAntropora gadhavii Guha & Gopikrishna, 2005 Fig. 5; Table 4 Antropora gadhavii Guha & Gopikrishna, 2005d: 140, pl. I fig. 10, pl. II fig 1. Material examined INDIA • 4 specs; yellowish limestone west of Haripar, Aquitanian, lower Miocene, Kharinadi Formation; 23° 21′12″ N, 68°49′13″ E; Sonar leg.; GIS/B 0461 to 0464 • 6 specs; yellow limestones of the Waghot in Waior-Charopadi stream cliff section and Lakdi Nadi cliff section; Burdigalian, lower Miocene, Chhasra Formation; 23°22′25″ N, 68°58′35″ E; Sonar leg; GIS/B 0465 to 0470. Description Colony unilaminar encrusting. Autozooids subtrigonal to subrectangular, indistinct zooidal boundaries (Fig. 5A). Gymnocyst indistinguishable; cryptocyst narrow, thickly calcified, descending into opesia. Opesia subrectangular to subtriangular in shape, elongate, occupying almost entire frontal area. Distal zooidal margins broad, subrectangular (Fig. 5B–C). Avicularia small, interzooecial, oval with acute rostrum, randomly placed at corners between autozooids, without crossbar (Fig. 5C–D). Ovicells not observed. Remarks The present species agrees with all the essential characters of Antropora gadhavii Guha & Gopikrishna, 2005.Published as part of Sonar, Mohan A., Pawar, Ravi V. & Wayal, Dnyaneshwar V., 2022, Newly discovered species of cheilostomatid Bryozoa from the Miocene of western Kachchh, Gujarat, India, pp. 16-39 in European Journal of Taxonomy 821 on page 24, DOI: 10.5852/ejt.2022.821.1795, http://zenodo.org/record/658078
Polypedilum (Polypedilum) ascium Chaudhuri, Guha and Das Gupta 1981
No full textPolypedilum (Polypedilum) ascium Chaudhuri, Guha and Dasgupta, 1981 Polypedilum (Polypedilum) ascium Chaudhuri, Guha and Dasgupta, 1981: 117. Materials examined. Paratypes: 2 males labelled ‘ Polypedilum (P.) ascium Chaudhuri, Guha & Das Gupta, Bhutan, Thimpu (27.47, 89.46), 23.x.1978, Coll. B.C. Nandi; 1 male labelled ‘ India, West Bengal, Bolpur (23.67, 87.61), 18.viii.1977, Coll. A. Chatterjee’; 1 male labelled ‘ India, West Bengal, Burdwan, Burdwan Town (23.23, 87.86), 03.iii.1979, Coll. S.K. Nandi’; 2 males labelled India, West Bengal, Alipurduar, Pukuria (26.49, 89.53), 11.vi.1984, Coll. T. Dutta; 1 male labelled ‘ India, Bankura, Susunia Hills (23.67, 87.02), Coll. T. Mukherjee, 26.v.2018. Remarks. The species can be recognised by its characteristic axe shaped inferior volsella (Figure 5A). Upon examination of the paratype specimens we found that the species have an outer lateral seta (Figure 5B) at 0.5–0.62 from the apex which was overlooked by Chaudhuri et al. (1981). Ecology. The species having a wide temperature tolerance (eurythermic) is recorded from Thimpu, Bhutan (27.47. 89.46), a part of Himalaya Biodiversity hotspot, where summer temperature is 21°C and Sususnia Hills of Bankura during the course of this study where mercury reaches beyond 40°C during the summer.Published as part of Mukherjee, Tuhar, Mukherjee, Bindarika & Hazra, Niladri, 2020, Revision of the Oriental species of Polypedilum Kieffer (Diptera: Chironomidae) with their phylogenetic relationship, pp. 31-69 in Zootaxa 4820 (1) on page 41, DOI: 10.11646/zootaxa.4820.1.3, http://zenodo.org/record/439725
THE ESTIMATION OF VITAMIN C IN FOODSTUFFS.
No full textThe previous method of estimating ascorbic acid in foodstuffs after heating the aqueous suspensions in H2S (Sen-Gupta and Guha, I. Indian Chem. Soc , 1937, 14, 95) has been modified by the introduction of treatment with ascorbic acid oxidase, which appears to give more accurate values for " total, true " ascorbic acid. Values obtained by this method are higher than those obtained by the Tillmans-Harris method. The stability of ascorbic acid oxidase has been investigated
Thalamoporella kachchhensis Guha & Gopikrishna 2004
No full textThalamoporella kachchhensis Guha & Gopikrishna, 2004 (Fig. 10, Table 7) Thalamoporella kachchhensis Guha & Gopikrishna, 2004: 20, figs 16‒19. Material examined. GIS/B 0211–0230. Yellow limestone, Murachbann, 2 km from Walaram Teerthdham, Chhasra Formation, late lower Miocene (Burdigalian), 23 ° 30’10” N, 68 ° 52’99” E, elevation 91–93 m, 13 January 2011, DST project, New Delhi. Description. Colony erect, bilaminar. Autozooids elongate, narrow, generally parallel-sided (Fig. 10A), surrounded by a thick, distinct, mural rim (Fig. 10B). Orifices large, elongate-oval to transversely D-shaped, distal border highly arched, raised, proximal margin concave. Adoral areas narrow, without tubercles. Conspicuous paired oval opesiules present near lateral walls of autozooids proximal to orifice, mostly of equal size, flanking a deeply sunken polypide tube (Fig. 10C). Cryptocyst shallow, perforated more densely in proximal half or twothirds. Avicularia at bifurcation of rows, drop–shaped, c. 75–80% of autozooidal length (Fig. 10B, D), with slightly raised acute symmetrical rostrum, foramen elongate-oval, more than half of avicularium length, cryptocyst granular. Ovicells not observed. Remarks. The present species superficially resembles Thalamoporella vinjhaniensis Guha & Gopikrishna, 2004 in the shape of avicularium. However, in that species the avicularium is torqued toward the sibling zooid. Thalamoporella kachchhensis also closely resembles T. floridana (Osburn, 1914) in the shape of avicularia (see Chaney et al. 1989), however, in T. floridana avicularia are c. 65% of zooidal length, adoral tubercles are well developed and irregular, and opesiules are unequal. The present species also closely resembles T. gothica (Busk, 1856) in the shape of the avicularium (see Chaney et al. 1989, p. 344, fig. d; Soule et al. 1999, p. 19, figs 25–28). However, T. gothica has comparatively short and wide autozooids, orifices wider than high and small or no adoral tubercles. Thalamoporella gracilata Tilbrook, Hayward & Gordon, 2001 shows some resemblance in the shape of the avicularium, but it differs from the present species in orifice shape and opesiule size.Published as part of Sonar, Mohan A., Pawar, Ravi V. & Wayal, Dyaneshwar V., 2022, Fossil Thalamoporellidae (Bryozoa) from Paleogene-Neogene sediments of western Kachchh, Gujarat, India, pp. 251-274 in Zootaxa 5104 (2) on page 262, DOI: 10.11646/zootaxa.5104.2.5, http://zenodo.org/record/628083
Thalamoporella vinjhanensis Guha & Gopikrishna 2004
No full textThalamoporella vinjhanensis Guha & Gopikrishna, 2004 (Fig. 15, Table 12) Thalamoporella vinjhanensis Guha & Gopikrishna, 2004: 39, figs 37, 38. Material examined. GIS/B 0353–0361. Yellowish limestone at cliff section of Lakdi Nadi near Tera village, Chhasra Formation, lower Miocene (Burdigalian), 23°22’19’’ N, 68°58’10’’ E, elevation 52–56 m, 15 January 2011, DST project, New Delhi. Description. Colony erect, bilaminar. Autozooids rectangular, parallel-sided or lateral margins weakly convex, bordered by thick, smooth, distinct boundaries (Fig. 15A). Orifice subrounded, the arcuate distal rim raised more than the concave proximal margin. Adoral areas narrow with no tubercles. Two opesiules adjacent to lateral walls proximal to orifice, large, rounded, mostly unequal and deeply sunken. Cryptocyst gently sloping in opesiular region, smooth, coarsely perforated (Fig. 15B, C). Avicularia at bifurcation of rows, variably penknife-shaped, longer than autozooids, with subacute rostrum; foramen elongate-oval, about half of avicularian length, pivots often present, cryptocyst fairly well developed proximally, sunken below autozooidal rim, smooth. Avicularium and sibling autozooid torqued toward each other (Fig. 15C). Ovicells not observed. Remarks. The present material shows intracolony variation of the avicularian rostral tips, which are sometimes subacute and others rounded, but it otherwise accords with T. vinjhanensis. The species has some similarity to Thalamoporella longirostrata Maplestone, 1900 (see Soule et al. 1992, p. 53, figs 73, 74; and SEM photo, MOV P10126 from Muddy Creek, Victoria on bryozoa.net), but avicularia of T. longirostrata lack pointed pivots and are not torqued.Published as part of Sonar, Mohan A., Pawar, Ravi V. & Wayal, Dyaneshwar V., 2022, Fossil Thalamoporellidae (Bryozoa) from Paleogene-Neogene sediments of western Kachchh, Gujarat, India, pp. 251-274 in Zootaxa 5104 (2) on pages 268-269, DOI: 10.11646/zootaxa.5104.2.5, http://zenodo.org/record/628083
Survivin as a global target of intrinsic tumor suppression networks
No full textCo-author Minakshi Guha is a student in the Cancer Biology program in the Graduate School of Biomedical Sciences (GSBS) at UMass Medical School.Despite the constant exposure to genomic insults that may lead to malignancy, cancer is surprisingly a relatively rare occurrence, and this is largely credited to an elaborate network of endogenous tumor suppression. Many effectors of tumor suppression have been identified, and their functions when activated in damaged cells have in large part been elucidated. What is less clear is whether there are common target gene(s) of tumor suppression, whose expression must be ablated in order to block transformation and preserve cellular homeostasis. Fresh experimental evidence suggests that silencing of the mitotic regulator and cell death inhibitor, survivin, is a universal requirement for successful tumor suppression in humans
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