169,964 research outputs found
Turicibacter bilis Maki & Looft 2022, SP. NOV.
No full textDESCRIPTION OF TURICIBACTER BILIS SP. NOV. Turicibacter bilis (bi'lis. L. gen. n. bilis of bile). Strictly anaerobic, Gram-positive, catalase-negative, non-motile, spore-forming, pleomorphic micro-organisms. Supplementation of media with 0.1% (v/v) chicken bile induces spore germination. Growth is poor in broth alone, but improves significantly in biphasic media or broth with an agar plug. Cells primarily exist as long chains of irregular rods (0.8–8.2×0.5–2.0 μm) or as individual or clusters of coccoid cells (1.0–2.3 μm). The organism is capable of growth between 30–45 °C and at pH 6.5–8.5, with optimums of 42 °C and pH 7.5, respectively. Colonies are visible on BHIGL agar after 1–2 days and appear as small to mediumsized irregularly shaped, umbonate colonies with undulating margins, with the raised centre an opaque white that transitions to a translucent tan or grey at the margins. Colonies are 2.5–5.0 mm after 3 days at 42 °C. The primary fermentation end products are acetate, butyrate and lactate. The organism is positive for arginine and gelatin biochemical reactivity. The type strain is MMM721 T and was isolated from the surface of a chicken eggshell (= ATCC TSD-238 T = CCUG 74757 T). The genome is 2.7 Mb with a G+C content of 34.4mol%.Published as part of Maki, Joel J. & Looft, Torey, 2022, Turicibacter bilis sp. nov., a novel bacterium isolated from the chicken eggshell and swine ileum, pp. 1-9 in International Journal of Systematic and Evolutionary Microbiology (005153) (005153) 72 (1) on page 8, DOI: 10.1099/ijsem.0.005153, http://zenodo.org/record/604875
‐Analogs of the Antitumor Antibiotic CC‐1065 by Two Consecutive Transition Metal‐Initiated Transformations
No full textNovel seco-analogs of CC-1065 1 were synthesized from comercially available nitroaniline by reduction, bromination, bisulfonation and bisallylation followed by reaction with tert-butyllithium, zirconocene and iodine. The obtained quinoline 6 was then transformed into 17 and 18, which, upon treatment with Pd-0, led to 21 and 22, respectively. (C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003
Fig. 1 in Turicibacter bilis sp. nov., a novel bacterium isolated from the chicken eggshell and swine ileum
No full textFig. 1. (a) Transmission electron microscope image of MMM721T cells. Bar, 1 Μm. (b) Scanning electron microscope image of MMM721T cells. Bar, 2 Μm. Cells were cultured in BHIGL for 24 h at 42 °C prior to fixation and visualization.Published as part of Maki, Joel J. & Looft, Torey, 2022, Turicibacter bilis sp. nov., a novel bacterium isolated from the chicken eggshell and swine ileum, pp. 1-9 in International Journal of Systematic and Evolutionary Microbiology (005153) 72 (1) on page 3, DOI: 10.1099/ijsem.0.005153, http://zenodo.org/record/604875
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Comparison of estimated breeding values, daughter yield deviations and de-regressed proofs within a whole genome scan for QTL
No full textThe definitive version is available at www.blackwell-synergy.comAn important issue in quantitative trait loci (QTL) detection is the use of phenotypic measurement as a dependent variable. Daughter yield deviations (DYDs) as the unit of choice are not available for all traits of interest. The use of de-regressed proofs (DRPFs) of estimated breeding values (EBVs) is an alternative to using daughter yield deviations. The objective of this study was to examine possible differences between DYDs and DRPFs within the use of QTL detection. The pedigree used was part of the granddaughter design of the German QTL effort. Consisting marker maps for livestock species were derived from all available data of 16 German Holstein paternal half-sib families with a total of 872 sires. The number of progeny ranged from 19 to 127. A whole genome scan was performed using weighted and unweighted multimarker regression with DYDs, DRPFs and EBVs as dependent variables for the traits milk, fat and protein yields. Results were compared with respect to the number of QTL detected. A similar number of QTL was detected with DRPFs and DYDs. Also, when dependent variables were weighted according to the variance of the trait, a higher number of QTL was detected at the desired level of significance as compared to using unweighted variables.H Thomsen, N Reinsch, N Xu, C Looft, S Grupe, C Kühn, G. A Brockmann, M Schwerin, B Leyhe-Horn, S Hiendleder, G Erhardt, I Medjugorac, I Russ, M Förster, B Brenig, F Reinhardt, R Reents, J Blümel, G Averdunk, E Kal
Quantitative trait loci mapping of functional traits in the German Holstein cattle population
No full textCopyright © 2003 American Dairy Science AssociationA whole-genome scan to detect quantitative trait loci (QTL) for functional traits was performed in the German Holstein cattle population. For this purpose, 263 genetic markers across all autosomes and the pseudoautosomal region of the sex chromosomes were genotyped in 16 granddaughter-design families with 872 sons. The traits investigated were deregressed breeding values for maternal and direct effects on dystocia (DYSm, DYSd) and stillbirth (STIm, STId) as well as maternal and paternal effects on nonreturn rates of 90 d (NR90m, NR90p). Furthermore, deregressed breeding values for functional herd life (FHL) and daughter yield deviation for somatic cell count (SCC) were investigated. Weighted multimarker regression analyses across families and permutation tests were applied for the detection of QTL and the calculation of statistical significance. A ten percent genomewise significant QTL was localized for DYSm on chromosome 8 and for SCC on chromosome 18. A further 24 putative QTL exceeding the 5% chromosomewise threshold were detected. On chromosomes 7, 8, 10, 18, and X/Yps, coincidence of QTL for several traits was observed. Our results suggest that loci with influence on udder health may also contribute to genetic variance of longevity. Prior to implementation of these QTL in marker assisted selection programs for functional traits, information about direct and correlated effects of these QTL as well as fine mapping of their chromosomal positions is required.Ch. Kühn, J. Bennewitz, N. Reinsch, N. Xu, H. Thomsen, C. Looft, G. A. Brockmann, M. Schwerin, C. Weimann, S. Hiendleder, G. Erhardt, I. Medjugorac, M. Förster, B. Brenig, F. Reinhardt, R. Reents, I. Russ, G. Averdunk, J. Blümel and E. Kal
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
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Association of PPARGC1A and CAPNS1 gene polymorphisms and expression with meat quality traits in pigs
No full textThis study aimed to investigate the genes PPARGC1A (peroxisome proliferator-activated receptor gamma-coactivator 1A) and CAPNS1 (calpain small subunit 1) as candidate genes affecting meat quality traits in pigs. Four polymorphisms were identified in PPARCG1A and three in CAPNS1. The PPARGC1A polymorphism c.1288T>A was associated with pH and cooking loss in a F2 Duroc×Pietrain experimental cross (DuPi, n=313) and with pH values in Italian Large White (ILW, n=380) and Italian Landrace (ILA, n=158) populations (P<0.05). The CAPNS1 polymorphism c.429A>C was associated with pH and conductivity in DuPi and with meat color in ILA (P<0.05). PPARGC1A mRNA expression associated with drip loss (P<0.01) and the same tendency was found for CAPNS1 (P=0.06). The promoter methylation profiling suggested that methylation is not involved in CAPNS1 expression regulation. In conclusion, porcine PPARGC1A and CAPNS1 genes may affect meat quality traits, with breed-specific differences, and they could be used as markers for the improvement of meat quality in pigs
Genome-wide association analyses for boar taint components and testicular traits revealed regions having pleiotropic effects
No full textThe aim of this study was to perform a genome-wide association analyses (GWAS) for androstenone, skatole and indole in different Pietrain sire lines and compare the results with previous findings in purebred populations. Furthermore, the genetic relationship of androstenone and skatole were investigated with respect to pleiotropy. In order to characterize the performance of intact boars, crossbred progenies of 136 Pietrain boars mated to crossbred sows from three different breeding companies were tested on four test stations. A total of 598 boars were performance tested according to the rules of stationary performance testing in Germany. Beside common fattening and carcass composition traits, the concentrations of the boar taint components and testicular size parameters were recorded. All boars were genotyped with the PorcineSNP60 Illumina BeadChip. The GWAS were performed using the whole data set as well as in sub groups according to the line of origin. Besides an univariate GWAS approach, principal component (PC) techniques were applied to identify common expression pattern affecting the biosynthesis and the metabolism of androstenone
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