56,459 research outputs found
Dadagulella cresswelli Rowson & Tattersfield 2013, sp. nov.
No full textDadagulella cresswelli sp. nov. urn:lsid:zoobank.org:act: B 3362D6 F- 2118 -4D1 D- 8 B 25-098 E 25 B 0 C 3 B 2 Figs 29, 57, 84; Table 1 Etymology After Pete Cresswell, who collected the specimen. Type material examined TANZANIA: holotype NMW. Z.2012.042.00001: 1 ad., Ngorongoro Crater, Arusha Region, crater rim on southeastern side, heavy rainforest leaf litter, leg. P. L. Cresswell, 2 Jun.1996. Other material examined None. Description SHELL (Figs 29, 57). Medium-sized (3.70 mm high x 1.80 mm wide), of 7.0 whorls. Ovate-acuminate, spire coeloconoid (spire angle 52°). Apex sharply pointed. Embryonic whorls smoothly granulate. Later whorls with relatively fine ribs (13 per mm on penultimate whorl). Sutures shallow. Umbilicus narrowly open. Peristome complete. Outer palatal surface of aperture with a very deep, long, furrow-like depression corresponding to the palatal tooth. Dentition 5-fold, consisting of: one V-shaped parietal tooth; one bifid slab-like palatal tooth, forming a clear parieto-palatal sinus, with the upper cusp projecting into the sinus; a deep-set columellar baffle and two shallower columellar denticles. Shells and anatomy of juveniles unknown. Range and habitat Forest at the type locality in northern Tanzania. The vegetation is presumably of a montane type, since the crater floor is above 1700 m while the rim rises to over 2400 m or higher. Remarks This species is distinctive in its deep, long furrow on the outer palatal surface in combination with the coeloconoid spire and dentition. D. minerata sp. nov. shares these features, but differs in having weaker ribs and less complex dentition. It is the only Dadagulella gen. nov. species thus far collected in the volcanic (as opposed to block-faulted) highlands of Tanzania or Kenya.Published as part of Rowson, Ben & Tattersfield, Peter, 2013, Revision of Dadagulella gen. nov., the " Gulella radius group " (Gastropoda: Streptaxidae) of the eastern Afrotropics, including six new species and three new subspecies, pp. 1-46 in European Journal of Taxonomy 37 on page 18, DOI: 10.5852/ejt.2013.37, http://zenodo.org/record/380677
Revision of Dadagulella gen. nov., the “Gulella radius group” (Gastropoda: Streptaxidae) of the eastern Afrotropics, including six new species and three new subspecies
No full textThe genus Dadagulella gen. nov. is described to include 16 species of small, dentate, ovateacuminate Afrotropical snails. An identification key is provided and biogeography, anatomy and systematics are discussed. The type species is the Kenyan D. radius (Preston, 1910) comb. nov., whose name has informally been used for part of the group in the past. Substantial intraspecific variation occurs in three species: D. radius itself, D. browni (van Bruggen, 1969) comb. nov. and D. minuscula (Morelet, 1877) comb. nov. (= Ennea fi scheriana Morelet, 1881) (non Gulella minuscula Emberton & Pearce, 2000) . We recognise subspecies within each of these: D.radius radius (Preston, 1910) comb. nov., D. r. calva (Connolly, 1922) comb. et stat. nov., D. browni browni (van Bruggen, 1969) comb. nov., D. b. mafi ensis subsp. nov., D. b. semulikiensis subsp. nov., D. minuscula minuscula (Morelet, 1877) comb. nov., D. m. mahorana subsp. nov. Six new Tanzanian species are described: D. cresswelli sp. nov., D. delta sp. nov., D. ecclesiola sp. nov., D. frontierarum sp. nov., D. minareta sp. nov., and D. pembensis sp. nov. The genus includes seven other previously described species: D. cuspidata (Verdcourt, 1962) comb. nov.; D. rondoensis (Verdcourt, 1994) comb. nov.; D. conoidea (Verdcourt, 1996) comb. nov.; D. selene (van Bruggen & Van Goethem, 1999) comb. nov.; D. meredithae (van Bruggen, 2000) comb. nov.; D. nictitans (Rowson & Lange, 2007) comb. nov.; and D. delgada (Muratov, 2010) comb. nov
Figs 8–13 in Two new species of Gulella (Mollusca Pulmonata: Streptaxidae) from the Taita Hills Kenya
No full textFigs 8–13. Gulella ndiwenyiensis sp. n., anatomy of paratype 1: (8) salivary gland from columellar side; (9) penis from ventral side; (10) genitalia from dorsal side; (11) penis opened from dorsal side; (12, 13) views of interior surface of penis, greatly enlarged. Abbreviations: bc – bursa copulatrix, bsr – basal sheath retractor muscle, p – penis, pa – penial appendix, prm – penial retractor muscle, ps – penial sheath, sgd – salivary gland duct, v – vagina, vd – vas deferens.Published as part of B, Rowson, C, N & Lange, 2007, Two new species of Gulella (Mollusca Pulmonata: Streptaxidae) from the Taita Hills Kenya, pp. 21-32 in African Invertebrates 48 (2) on page 24, DOI: 10.5281/zenodo.766804
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
Mentoria; or The young lady's friend. In two volumes. / By Mrs. Rowson, of the New-Threatre, Philadelphia: author of The inquisitor, Fille de chambre, Victoria, Charlotte, &c. &c.
No full text2 v. in 1 ; 17 cm. (12mo)Running title: Young lady's friend.Vol. 1: [2], v, [2], 10-106, [2] p.; v. 2: 116, [4] p."Verses, addressed to a young lady, on her leaving school."--p. [9]-14.Bookseller's advertisements, v. 2, p. [117-119]
The fille de chambre, a novel. / By Mrs. Rowson, of the New Theatre, Philadelphia; author of Charlotte, The inquisitor, Victoria, &c. ; [Seven lines of verse]
No full textvi, [1], 8-207, [1] p. ; 17 cm. (12mo)Publisher's prospectus, p. [208]
Carinartemis vesperus Siriboon & Sutcharit & Naggs & Rowson & Panha 2014, new species
No full text<i>Carinartemis vesperus</i> Siriboon & Panha, new species <p>(Figs 1, 2B, 6 B–E, 7A, B, 8A–F, Table 1)</p> <p> <b>Type material.</b> Holotype CUMZ 5019 (Fig. 6B). Measurement: shell height 6.9 mm, shell width 9.6 mm, 7 whorls. Paratypes: CUMZ 5020 (3 shells), 6200 (60 shells; Fig. 6C, D), 6201 (2 specimens in ethanol; Figs 2B, 7A, B, 8 A–F), NHMUK 20130077 (2 shells), SMF (2 shells), and ZRC (2 shells).</p> <p> <b>Type locality.</b> Khao Kling, Khao Yoi District, Phetchaburi, Thailand. Rock crevices on isolated limestone hill reaching about 100 m above mean sea level (13°15'36.5"N, 99°48'14.8"E).</p> <p> <b>Other material examined.</b> Khao Yoi, Khao Yoi District, Phetchaburi (CUMZ 6202). Khao Yoi, Phetchaburi (NMW.1955.158.25233, Fig. 6E).</p> <p> <b>Etymology.</b> The specific epithet “ <i>vesperus</i> ” from a Latin term for “west” refers to the locality of the new species in the west of Thailand.</p> <p> <b>Diagnosis.</b> <i>Carinartemis vesperus</i>, new species, can be distinguished from <i>H. mirificus</i> (Möllendorff, 1894) in having a higher spire, peripheral keel around nearly the entire penultimate whorl, a subcircular aperture, and in lacking apertural lamellae. While <i>H. mirificus</i> has a lower spire, a peripheral keel around less than half of the penultimate whorl, a triangular aperture, and a strong and triangular parietal lamella.</p> <p> Compared with <i>H. exacutus</i> (Gould, 1856) and <i>H. sankeyi</i> (Benson, 1859), this new species differs by having a strong peripheral keel around nearly the entire penultimate whorl, having the last whorl less inflated and much deviated from the vertical axis, and in lacking strong apertural lamellae. Whereas, these two species exhibit a strong peripheral keel over less than half of the penultimate whorl, and have the last whorl inflated and less deviated from the vertical axis. The apertural dentition of <i>H. exacutus</i> has two parietal lamellae and <i>H. sankeyi</i> has a strong parietal lamella.</p> <p> <i>Carinartemis vesperus</i>, new species, differs from <i>C. striatus</i>, new species, by having a smaller shell with weaker transverse ridges, the area below the periphery of the penultimate whorl smooth, a short longitudinal furrow in the umbilical area, and in lacking apertural lamellae. The genitalia have a short penis and vagina, and a thick penial sheath with the vas deferens passing it. Penial papillae are absent, and vaginal hooks are present. Whereas <i>C. striatus</i>, new species, has a larger shell, strong transverse ridges over the entire shell, no longitudinal furrow in the umbilical area, and has a prominent parietal lamella. The genitalia have a long penis and vagina and a very thin penial sheath with the vas deferens attached to its distal end. Penial papillae are present, and vaginal hooks are absent.</p> <p> <b>Description.</b> Shell suboblique-heliciform, white and translucent; whorls 7, spire conical with distinct suture. Shell surface glossy, with thin and fine transverse ridges; ridges disappear below periphery of penultimate whorl and around umbilicus. Embryonic shell with about 2½ whorls and smooth surface; following whorls regularly expanding. Shell periphery wide and sharply keeled around nearly entire penultimate whorl; last whorl axially deflected. Umbilicus widely open and deep with short longitudinal furrow. Aperture subcircular, peristome discontinuous, thickened, and expanded. Apertural dentition usually without lamellae, but sometimes with small parietal lamella, and rarely with very small other lamellae (Fig. 6B).</p> <p> <b>Radula.</b> Teeth arranged in anteriorly V-shaped rows, each row containing 47–49 teeth with the formula (23-24)-1-(23- 24); central tooth small, short, triangular with pointed cusp. Lateral and marginal teeth undifferentiated, unicuspid, and lanceolate; lateral teeth gradually reduced in length and size with outer teeth much smaller and shorter than inner teeth (Fig. 8F).</p> <p> <b>Genital organs.</b> Atrium (at) short. Proximal penis (p) long, slender; becoming slightly broader with short pouch before tapering distally. Penial sheath (ps) thick, extending about fourth-fifths of total penis length; penial sheath retractor muscle (psr) very thin, originating at atrium and body wall (Fig. 7A). Vas deferens (vd) long, slender; slightly broadened before tapering distally; passes through about one-tenth of penial sheath length before entering into penis distally (Fig. 7B). Penial retractor muscle (pr) thin and very long, inserting distally on penis at the penis and vas deferens junction.</p> <p> Internal wall of atrium smooth with numerous atrial pores (Fig. 8A). Penial papillae absent; pale brown penial hooks present, about 40 hooks/200 μm 2. Penial hooks short (<0.03 mm in length), expanding at base, tips obtuse and curved towards genital orifice (Fig. 8B, C).</p> <p>Vagina (v) very short and stout. Gametolytic duct (gd) long, extending as far as albumin gland; gametolytic sac ovate (gs). Free oviduct (fo) long, proximally large with equivalent diameter with vagina, and tapering to smaller tube distally. Oviduct (ov) enlarged and folded; prostate gland inconspicuous and bound to oviduct. Talon (ta) small, short and club shaped. Hermaphroditic duct (hd) bearing seminal vesicle (sv) about as long as the length from talon to branching point of seminal vesicle (Fig. 7A).</p> <p> Vaginal wall with transparent vaginal hooks about 8 hooks/200 μm 2; hooks located on oblique parallel vaginal folds. Vaginal hooks short (<0.04 mm in length), expanding at base, tips obtuse slightly curving away from genital orifice (Fig. 8D, E).</p> <p> <b>Distribution.</b> This new species seems to be the restricted to limestone in western Thailand at the type locality and at Khao Yoi, Phetchaburi, the limestone karst about 10 km east of the type locality.</p> <p> <b>Remarks.</b> Shell variation can be observed in five paratypes by having very small parietal lamella and the detectable upper palatal, palatal, basal and columellar lamellae (Fig. 6D). In addition, a single shell from Khao Yoi, Phetchaburi (Fig. 6E; NMW.1955.158.25233) has a strong parietal lamella and four other very small peripheral lamellae. However, we considered this conspecific based on the characters of thin and fine transverse ridges and broadly expanded apertural lip, and because it was collected within the range of this species. However, further anatomical and molecular data of the newly collected specimen with precise locality will elucidate whether this represents intraspecific variation or a separate taxon.</p>Published as part of <i>Siriboon, Thanit, Sutcharit, Chirasak, Naggs, Fred, Rowson, Ben & Panha, Somsak, 2014, Revision of the carnivorous snail genus Indoartemon Forcart, 1946 and a new genus Carinartemis from Thailand (Pulmonata: Streptaxidae), pp. 161-174 in Raffles Bulletin of Zoology 62</i> on pages 168-171, DOI: <a href="http://zenodo.org/record/4504075">10.5281/zenodo.4504075</a>
Trials of the human heart, a novel. In four volumes. / By Mrs. Rowson, of the New Theatre, Philadelphia, author of Charlotte, Fille de chambre, Inquisitor, &c. &c. ; [Five lines of quotations] ; Vol I[-IV].
No full text2 v. ; 17 cm. (12mo)Dedicated to Mrs. Bingham.Imprint of v. 3-4 varies: Philadelphia: Printed for the author, by Mountford, Bioren & Co. no. 75, Dock-Street. Sold by Messrs. Carey, Rice, Campbell, Ormrod, Young, and the author, corner of Seventh and Chesnut-Streets. M.DCC.XCV.Vol 1: xx, 156, 156 p.; v. 2, 154, [2], 172 p.List of subscribers, v. 1, p. [iii]-vi
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
Convective–reactive nucleosynthesis of K, Sc, Cl and p-process isotopes in O–C shell mergers
No full text© 2017 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. We address the deficiency of odd-Z elements P, Cl, K and Sc in Galactic chemical evolution models through an investigation of the nucleosynthesis of interacting convective O and C shells in massive stars. 3D hydrodynamic simulations of O-shell convection with moderate C-ingestion rates show no dramatic deviation from spherical symmetry. We derive a spherically averaged diffusion coefficient for 1D nucleosynthesis simulations, which show that such convective-reactive ingestion events can be a production site for P, Cl, K and Sc. An entrainment rate of 10-3M⊙s-1features overproduction factors OPs≈ 7. Full O-C shell mergers in our 1D stellar evolution massive star models have overproduction factors OPm> 1 dex but for such cases 3D hydrodynamic simulations suggest deviations from spherical symmetry. γ - process species can be produced with overproduction factors of OPm> 1 dex, for example, for130, 132Ba. Using the uncertain prediction of the 15M⊙, Z = 0.02 massive star model (OPm≈ 15) as representative for merger or entrainment convective-reactive events involving O- and C-burning shells, and assume that such events occur in more than 50 per cent of all stars, our chemical evolution models reproduce the observed Galactic trends of the odd-Z elements
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