65 research outputs found
Differential susceptibility of Iowa waterhemp (Amaranthus tuberculatus) populations to 2,4-D, dicamba, and glufosinate
No full textMultiple herbicide-resistant waterhemp (Amaranthus tuberculatus (Moq.) J.D. Sauer) has limited herbicide options for Iowa row crop production. Soybean (Glycine max (L.) Merr.) cultivars and corn (Zea mays L.) hybrids resistant to 2,4-D, dicamba, and glufosinate have provided more herbicide options for waterhemp management. A probability-based survey of Iowa fields was conducted in fall 2019 wherein waterhemp seeds were collected and their susceptibility to 2,4-D, dicamba, and glufosinate was determined. The average survival of all populations treated with 1× 2,4-D, dicamba, and glufosinate was 17%, 5%, and 4%, respectively. Seven percent of treated populations exhibited ≥50% survival to 1× rates of 2,4-D.This article is published as Ryan C. Hamberg, Ramawatar Yadav, Micheal D.K. Owen, and Mark A. Licht. Differential susceptibility of Iowa waterhemp (Amaranthus tuberculatus) populations to 2,4-D, dicamba, and glufosinate. Canadian Journal of Plant Science. (2023). https://doi.org/10.1139/cjps-2023-0081. © 2023 The Author(s). This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author(s) and source are credited
Characteristics of Self-Citation in Journal of Natural Rubber Research 1988-1997: a Ten-Year Bibliometric Study
No full textAnalyses the extent of journal self-citation and author self-citation in the research articles and short communications published in Journal of Natural Rubber Research during 1988 to 1997. Results show that 53% of articles contained journal self-citations; the rate of journal self-citations per article ranges between 1 to 12; a high percentage of authors (61.4%) contributing articles to the journal cited themselves; a tendency is noticed for authors affiliated to the institution publishing the journal to cite the journal; the highest self-citing author is A. D. Roberts
The electron transfer properties of sigma and sepia melanin, 1989
No full textThe melanocytotoxic phenol, p-hydroxyanisole (monomethylether of hydroquinone, MMEH) is a substrate for mushroom tyrosinase. Kinetic and oxygen electrode studies have been performed compari ng the total (anaerobi c and aerobi c) reaction in the formation of the 1, 2-qui none in the presence and absence of synthetic (Sigma) and "biological" (Sepia) melanin samples. These results show evidence of melanin actively transferring electrons to tyrosi nase; thereby acting as a DOPA-l ike cofactor. These results also reveal major differences in the chemical properties of synthetic and biologically extracted melanin in an in vitro system, thus raising important questions about conclusions that are extended to biological systems, using synthetic melanin
Corrigendum to “The 2016 update of the International Study Group (ISGPF) definition and grading of postoperative pancreatic fistula: eleven years after.” Surgery 2017. Mar; 161 (3):584–591. Epub Dec 28, 2016 (Surgery (2017) 161(3) (584–591), (S0039606016307577), (10.1016/j.surg.2016.11.014))
No full textThe authors regret that the name of author Charles R. Vollmer MD is incorrect in the final published version. The correct name Charles Vollmer. The authors would like to apologise for any inconvenience caused. Below is the correct order of authors: Claudio Bassi, MDa, Giovanni Marchegiani, MDa, Christos Dervenis, MD,b, Micheal Sarr, MDc, Mohammad Abu Hilal, MDd, Mustapha Adham, MDe, Peter Allen, MDf, Roland Andersson, MDg, Horacio J. Asbun, MDh, Marc G. Besselink, MDi, Kevin Conlon, MDj, Marco Del Chiaro, MDk, Massimo Falconi, MDl, Laureano Fernandez-Cruz, MDm, Carlos Fernandez-del Castillo, MDn, Abe Fingerhut, MDo, Helmut Friess, MDp, Dirk J Gouma, MDi, Thilo Hackert, MDq, Jakob Izbicki, MDr, Keith D. Lillemoe, MDn, John P. Neoptolemos, MDs, Attila Olah, MDt, Richard Schulick, MDu, Shailesh V. Shrikhande, MDv, Tadahiro Takada, MDw, Kyoichi Takaori, MDx, William Traverso, MDy, Charles Vollmer, MDz, Christopher L. Wolfgang, MDaa, Charles J. Yeo, MDbb, Roberto Salvia, MDa, Marcus Buchler, MDq, from the International Study Group on Pancreatic Surgery (ISGPS
Characterization of novel prophages in lysogenic murine isolate lactobacillus murinus EF-1
No full textWe sought to isolate and characterize prophage from an inducible lysogenic Lactobacilli host from a rat gastrointestinal tract. First we isolated a Lactobacillus murinus strain from a rat fecal sample. After initial antibiotic induction, high-throughput DNA sequencing and assembly identified the potential lysogenic bacterium as L. murinus EF-1. A 2.30 Mbp draft genome was generated with a 39.6% G+C content and 2196 identified coding regions. These metrics are similar to other Lactobacillus species. Bioinformatic analyses identified 3 intact prophages within the L. murinus EF-1 genome of 26.1, 25.4, and 49.6Kbp size. To confirm phage existence, the antibiotic induced lysate was subject to transmission electron microscopy. An identified Siphoviridae morphology was confirmed with an 80nm icosahedral head and 200nm noncontractile tail. High throughput induced viral DNA sequencing and mapping to EF-1 revealed 99.9% of 162.55k DNA reads mapped to presumed phage region 7.1. Further genetic analyses revealed a 39.1Kbp, 39.43% G + C content, circular inducible prophage whose genome encoded 58 putative coding regions, named phiEF-1.1. PhiEF-1.1 attachment sites were found inserted into a host arginine t-RNA. Additional putative protein characterization of phiEF-1.1 revealed coding regions to be divergent from 104 viral genomic coding regions through BLASTp amino acid sequence percent similarity. The low amino acid sequence identity of two murinus L. murinus GIT isolates strain’s to phiEF-1.1 suggests putative prophage coding regions are divergent. A low level of identity between phiEF-1.1 and other identified phage CDS found within strain EF-1 may be due to horizontal gene transfer or the presence of other prophages within EF-1. Together, this evidence provides the identification of a lysogenic L. murinus EF-1 and novel inducible prophage phiEF-1.1.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-08-01The student, Eric Fritz, accepted the attached license on 2017-07-11 at 20:58.The student, Eric Fritz, submitted this Thesis for approval on 2017-07-11 at 21:40.This Thesis was approved for publication on 2017-07-19 at 08:50.DSpace SAF Submission Ingestion Package generated from Vireo submission #11415 on 2018-03-02 at 13:01:36Made available in DSpace on 2018-03-02T19:59:35Z (GMT). No. of bitstreams: 3
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Structure and phase transitions of genipin, an herbal medicine and naturally occurring cross-linker
No full textThe naturally occurring cross-linking agent genipin has recently been the subject of biomedical research both in the creation of hydrogel structures and as a potential active agent in its own right. In this study several methods of specimen preparation were used to isolate and stabilize crystalline genipin material. The thermodynamic properties of the genipin crystals and their phase changes were investigated using differential scanning calorimetry techniques. Single crystal and powder X-ray diffraction (XRD) confirmed two separate polymorphic phases denoted form I and form II. The structures were resolved, and the XRD traces were indexed, and both forms were found to be monoclinic. Genipin forms I and II were also isolated through methanol evaporation
crystallization. Form II was formed through this route when the crystallization was accompanied by polymerization of a fraction of the genipin. The materials were also tested under in situ heated, X-ray diffraction conditions at a synchrotron radiation source. Genipin forms I and II were shown to have melting temperatures of around 121 and 101 °C, respectively
Codeswitching in the Irish-Latin Leabhar Breac: Mediæval homiletic culture
No full textAn Leabhar Breac ('The Speckled Book'; c.1410) is a manuscript containing a collection of mostly religious material in both Latin and Irish, now housed in Dublin at the Royal Irish Academy. The present publication explores the make-up of the manuscript, focusing on the question which languages are used where and for which texts, and singling out individual texts which use a combination of languages within the same speech act, a process called codeswitching. Special attention is paid to the genre of the homily, a moral commentary on religious themes. The use of Latin and Irish in such texts can shed light on the intellectual culture of Ireland, an important centre of learning in mediaeval Europe. The Leabhar Breac manuscript is a composite piece of various sources, most of which date to about 1100, though some may be dated as late as 1350. By studying the languages of these texts, one can hypothesise about the languages and dates of their sources, and thus about the availability and level of Latin learning in Irish intellectual society through time. For this purpose it is important to study not only individual texts but also the quires in which they occur. The hierarchy and juxtaposition of texts and languages is an indication of their intended manner of composition, while the level of compositional ability on the part of the author or scribe is a reflection of bilingual education. Such a bilingual education can then be compared to similar circumstances such as Latin-English sermons in England
Does the Current Account Matter?
No full textThe purpose of this paper is to investigate in detail the behavior of the current account in emerging economies, and in particular its role if any in financial crises. Models of current account behavior are reviewed, and a dynamic model of current account sustainability is developed. The empirical analysis is based on a massive data set that covers over 120 countries during more than 25 years. Important controversies related to the current account including the extent to which current account deficits help predict currency crises are also analyzed. Throughout the paper I am interested in analyzing whether there is evidence supporting the idea that there are costs involved in running 'very large' deficits. Moreover, I investigate the nature of these potential costs, including whether they are particularly high in the presence of other type of imbalances.
STRUCTURAL ANALYSIS OF THE TRANSCRIPTION PRODUCTS OF A TEMPERATURE-SENSITIVE PHENOTYPIC MUTANT OF MOLONEY SARCOMA VIRUS--MUSV TS110
No full textCells infected with a temperature sensitive phenotypic mutant of Moloney sarcoma virus (MuSVts110) exhibit a transformed phenotype at 33(\u27(DEGREES)) and synthesize two virus specific proteins, p85(\u27gag-mos), a gag-mos fusion protein and p58(\u27gag), a truncated gag precursor protein (the gag gene codes for viral structural proteins and mos is the MuSV transforming gene). At 39(\u27(DEGREES)) only p58(\u27gag) is synthesized and the morphology of the cells is similar to uninfected NRK parental cells. Two MuSVts110 specific RNAs are made in MuSVts110-infected cells, one of 4.0 kb in length, the other of 3.5 kb. Previous work indicated that each of these RNAs arose by a single central deletion of parental MuSV genetic material, and that p58(\u27gag) was made by the 4.0 kb RNA and p85(\u27gag-mos) from the 3.5 kb RNA. The objective of my dissertation research was to map precisely the deletion boundaries of both of the MuSVts110 RNAs, and to determine the proper reading frame across both deletion borders. This work succeeded in arriving at the following conclusions: (a) Using S-1 nuclease analysis and primer extension sequencing, it was found that the 4.0 kb MuSVts110 RNA arose by a 1488 base deletion of 5.2 kb parental MuSV genomic RNA. This deletion resulted in an out of frame fusion of the gag and mos genes that resulted in the formation of a stop codon which causes termination of translation just beyond the c-terminus of the gag region. Thus, this RNA can only be translated into the truncated gag protein p58(\u27gag). (b) S-1 analysis of RNA from cells cultivated at different temperatures demonstrated that the 4.0 kb RNA was synthesized at all temperatures but that synthesis of the 3.5 kb RNA was temperature sensitive. These observations supported the data derived from blot hybridization experiments the interpretation of which argued for the existence of a single provirus in MuSVts110 infected cells, and hence only a single primary transcript (the 4.0 kb RNA). (c) Analyses similar to those described in (a) above showed that the 3.5 kb RNA was derived from the 4.0 kb MuSVts110 RNA by a further deletion of 431 bases, fusing the gag and mos genes into a continuous reading frame capable of directing synthesis of the p85(\u27gag-mos) protein. These sequence data and the presence of only one MuSVts110-specific provirus, indicate that a splice mechanism is employed to generate the 3.5 kb RNA since the gag and mos genes are observed to be fused in frame in this RNA. . . . (Author\u27s abstract exceeds stipulated maximum length. Discontinued here with permission of author.) UM
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