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Stable isotope paleohydrology and chemostratigraphy of the Albian Wayan Formation from the wedge-top depozone,North American Western Interior Basin

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Science China Earth Sciences 2017年第1期60卷 44-57页

作者： Jeffrey B.ross Greg A.LUDVIGSON Andreas MOLLER Luis A.GONZALEZ J.D.WALKER Department of Geology University of Kansas Kansas Geological Survey University of Kansas

Understanding of the role of atmospheric moisture and heat transport in the climate system of the Cretaceous greenhouse world represents a major challenge in Earth system science. Stable isotopic paleohydrologic data from mid-Cretaceous paleosols in North America, from paleoequatorial to paleoArctic latitudes, have been used to constrain the oxygen isotope mass balance of the Albian hydrologic cycle. Over the range from 40°-50°N paleolatitude, sideritic paleosols predominate, indicating paleoenvironments with positive precipitation-evaporation （P-E） balances. Local exceptions occur on leeward side of the Sevier Orogen, where calcic paleosols in the wedge-top depozone record paleoenvironments with negative P-E balances in the orographic rain shadow. Stratigraphic sections in the Wayan Formation of Idaho （WF） were sampled from the wedge-top depozone. The units consist of stacked m-scale mudstone paleosols separated by m-scale sandstone-siltstone beds. Sections were sampled for organic carbon isotope profiles, and B-horizons from 6 well-developed paleosols were sampled for detrital zircons to determine maximum depositional ages. The first of these from the WF has produced a U-Pb concordia age of 101.0±1.1 Ma. This same WF section has produced a stratigraphic trend of upwardly decreasing δ18C values ranging from -24‰ upwards to -27‰ VPDB, suggesting correlation to the late Albian C15 C-isotope segment. Pedogenic carbonates from the WF principally consist of micritic calcite, with carbon-oxygen isotope values that array along meteoric calcite lines （MCLs） with δ18O values that range from -9.47‰ up to -8.39‰ VPDB. At approximately 42°N paleolatitude, these MCL values produce calculated paleoprecipitation values of-8.12‰ to -7.04‰ VSMOW, a range that is consistent with the estimates produced from other proxies at the same paleolatitudes across North America. These results indicate that despite the orographic rain shadow effect, the processes of meridional atmospheric moist

关键词： Cretaceous Paleoclimate Wayan Formation Pedogenic carbonates Geochronology

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Characterization of the first Wolbachia from the genus Scaptodrosophila,a male-killer from the rainforest species ***

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Insect Science 2022年第5期29卷 1401-1413页

作者： Kelly M.Richardson Michele Schiffer Perran A.ross Joshua A.Thia Ary A.Hoffmann School of Biosciences Bio21 InstituteThe University of MelbourneVictoriaAustralia Daintree Rainforest Observatory James Cook UniversityCape TribulationQueenslandAustralia

The Scaptodrosophila genus represents a large group of drosophilids with a worldwide distribution and a predominance of species in Australia,but there is little information on the presence and impacts of Wolbachia endosymbionts in this *** we describe the first Wolbachia infection from this group,wClay isolated from Scaptodrosophila claytoni(van Klinken),a species from the east coast of *** infection is polymorphic in natural populations,occurring at a frequency of around 6%–10%.wClay causes male killing,producing female-biased lines;most lines showed 100%male killing,though in 1 line it wasross 24 generations,suggesting it is likely to persist in *** infection has not been previously described but is closely related to the male-killing Wolbachia recently described from Drosophila pandora based on multilocus sequence typing and the wsp ***-killing Wolbachia are likely to be common in drosophilids but remain difficult to detect because the infections can often be at a low frequency.

关键词： male-killer multilocus sequence typing phenotypic effects Scaptodrosophila Wolbachia

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Transcriptome Analysis of Arabidopsis Wild-Type and gl3-sst sim Trichomes Identifies Four Additional Genes Required for Trichome Development

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Molecular Plant 2009年第4期2卷 803-822页

作者： M. David Marks Jonathan R Wenger Edward Gilding ross Jilk Richard A. Dixon Department of Plant Biology University of Minnesota St Paul MN 551108 USA Department of Chemistry University of Wisconsin-River Falls River Falls Wl 54022 USA Plant Biology Division Samuel Roberts Noble Foundation Ardmore OK 73401 USA

Transcriptome analyses have been performed on mature trichomes isolated from wild-type Arabidopsis leaves and on leaf trichomes isolated from the g13-sst sim double mutant, which exhibit many attributes of immature trichomes. The mature trichome profile contained many highly expressed genes involved in cell wall synthesis, protein turnover, and abiotic stress response. The most highly expressed genes in the g13-sst sim profile encoded ribosomal proteins and other proteins involved in translation. Comparative analyses showed that all but one of the genes encoding transcription factors previously found to be important for trichome formation, and many other trichome-important genes, were preferentially expressed in gl3-sst sim trichomes. The analysis of genes preferentially expressed in gl3-sst sim led to the identification of four additional genes required for normal trichome development. One of these was the HDG2 gene, which is a member of the HD-ZIP IV transcription factor gene family. Mutations in this gene did not alter trichome expansion, but did alter mature trichome cell walls. Mutations in BIT resulted in a loss of trichome branch formation. The relationship between bit and the phenotypically identical mutant, sti, was explored. Mutations in PEL3, which was previously shown to be required for development of the leaf cuticle, resulted in the occasional tangling of expanding trichomes. Mutations in another gene encoding a protein with an unknown function altered trichome branch formation.

关键词： Cell wall cell differentiation homeodomain wax trichome

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Cardiac rehabilitation and exercise therapy in the elderly： Should we invest in the aged？

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Journal of Geriatric Cardiology 2012年第1期9卷 68-75页

作者： Arthur R Menezes Carl J Lavie Richard V Milani ross A Arena Timothy S Church Department of Cardiovascular Diseases John Ochsner Heart and Vascular Institute Ochsner Clinical School The University of Queensland School ofMedicine 1514 Jefferson Highway New Orleans LA 70121 USA Department of Orthopaedics Physical Therapy Program and Division of Cardiology Department of Internal Medicine University of New MexicoAlbuquerque NM87131 USA Department of Preventive Medicine Pennington Biomedical Research Center Louisiana State University System Baton Rouge LA 70808 USA

Coronary heart disease （CHD） is the leading cause of death worldwide and becomes increasingly prevalent among patients aged 65 years and *** patients are at a higher risk for complications and accelerated physical deconditioning after a cardiovascular event,especially compared to their younger *** last few decades were privy to multiple studies that demonstrated the beneficial effects of cardiac rehabilitation （CR） and exercise therapy on mortality,exercise capacity,psychological risk factors,inflammation,and obesity among patients with ***,a significant portion of the available data in this field pertains to younger patients.A viable explanation is that older patients are grossly underrepresented in these programs for multiple reasons starting with the patient and extending to the *** this article,we will review the benefits of CR programs among the elderly,as well as some of the barriers that hinder their participation.

关键词： Cardiac rehabilitation Exercise therapy Elderly patients Exercise capacity

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Use of non-timber forest products from invasive alien Prosopis species(mesquite) and native trees in South Africa: implications for management

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Forest Ecosystems 2015年第3期2卷 197-207页

作者： ross T Shackleton David C Le Maitre Brian W van Wilgen David M Richardson Centre for Invasion Biology Department of Botany and ZoologyStellenbosch University Centre for Invasion Biology Natural Resources and the EnvironmentCSIR

Background: Prosopis species have been introduced to many areas outside their native range to provide benefits to local communities. Several Prosopis species and their hybrids(hereafter "mesquite") have, however, become naturalised and invasive and now generate substantial costs. Management options are limited because of the complex conflicts of interest regarding benefits and costs. Management policies and strategies must take account of such conflicts, but further insights are needed on the dimensions of uses and impacts before such information can be usefully applied. Current policy in South Africa allows for the growth and use of mesquite in one province,but not in others where its control is mandatory. We report on a study to quantify the direct use and perceptions of non-timber forest products(NTFPs) from mesquite and native trees in South ***: Semi-structures household interviews were conducted with various stakeholder groups to identify what tree products are used, to ascertain amounts used as well as to gauge perceptions of natural resource use between different tree species and use over ***: The direct household use value of native trees was higher than that of mesquite, and local stakeholders attached greater value to products from native trees than from mesquite. Therefore, native trees are and will still be preferentially harvested, and mesquite is unlikely to offer protection to native species by providing an alternative source of products. Mesquite pods do, however, provide valuable additional resources(fodder and medicinal products). The use of both native trees and mesquite is decreasing as the incomes of poorer households rise and as alternative energy sources become available. The benefits and reliance on mesquite are not as high as previously assumed and the impacts from mesquite invasions create large problems for local ***: This study provides further evidence that the impacts of mesquite exceed the benefi

关键词： Biological invasions Conflicts of interests Cost v

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Liver iron transport

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World Journal of Gastroenterology 2007年第35期13卷 4725-4736页

作者： ross M Graham Anita CG Chua Carly E Herbison John K Olynyk Debbie Trinder School of Medicine and Pharmacology Fremantle HospitalUniversity of Western AustraliaFremantleWestern AustraliaAustralia School of Medicine and Pharmacology Fremantle HospitalUniversity of Western AustraliaFremantleWestern AustraliaAustralia Western Australian Institute for Medical ResearchNedlandsWestern AustraliaAustralia

The liver plays a central role in iron metabolism. It is the major storage site for iron and also expresses a complex range of molecules which are involved in iron transport and regulation of iron homeostasis. An increasing number of genes associated with hepatic iron transport or regulation have been identified. These include transferrin receptors （TFRI and 2）, a ferrireductase （STEAP3）, the transporters divalent metal transporter-1 （DMT1） and ferroportin （FPN） as well as the haemochromatosis protein, HFE and haemojuvelin （HJV）, which are signalling molecules. Many of these genes also participate in iron regulatory pathways which focus on the hepatic peptide hepcidin. However, we are still only beginning to understand the complex interactions between liver iron transport and iron homeostasis. This review outlines our current knowledge of molecules of iron metabolism and their roles in iron transport and regulation of iron homeostasis.

关键词： Liver Iron homeostasis Iron uptake Iron release Iron transporters Hereditary haemochromatosis

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Jewish doctors and the Holocaust

Jewish doctors and the Holocaust

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作者： ross W. Halpin

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Phage-mediated horizontal gene transfer and its implications for the human gut microbiome

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Gastroenterology Report 2022年第1期10卷 78-89页

作者： Tatiana Borodovich Andrey N.Shkoporov R.Paul ross Colin Hill APC Microbiome Ireland University College CorkCorkIreland School of Microbiology University College CorkCorkIreland

Horizontal gene transfer(HGT)in the microbiome has profound consequences for human health and *** spread of antibiotic resistance genes,virulence,and pathogenicity determinants predominantly occurs by way of *** exists of extensive horizontal transfer in the human gut *** transduction is a type of HGT event in which a bacteriophage transfers non-viral DNA from one bacterial host cell to *** abundance of tailed bacteriophages in the human gut suggests that transduction could act as a significant mode of HGT in the gut *** we review in detail the known mechanisms of phage-mediated HGT,namely specialized and generalized transduction,lateral transduction,gene-transfer agents,and molecular piracy,as well as methods used to detect phage-mediated HGT,and discuss its potential implications for the human gut microbiome.

关键词： gut phageome horizontal gene transfer gene transduction phage-mediated gene transfer

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Heather ross prints

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2012年

作者： photographs by John Green by Heather ross

ISBN: (纸本)9781584799955

Heather ross Prints is an innovative craft book from the author of Weekend Sewing (published by STC Craft, 2009). In addition to being a designer and seamstress, Heather is well known for her whimsi(更多) Heather ross Prints is an innovative craft book from the author of Weekend Sewing (published by STC Craft, 2009). In addition to being a designer and seamstress, Heather is well known for her wh

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Achieving Better Educational Practices Through Research Evidence:A Critical Analysis and Case Illustration of Benefits and Challenges

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ECNU Review of Education 2021年第1期4卷 108-127页

作者： Steven M.ross Jennifer R.Morrison Johns Hopkins University

Purpose:We examine considerations regarding the positive contributions of evidence accountability and challenges that frustrate educators in gaining access to the needed product ***/Approach/Methods:We review the research literature on the multiple characteristics of evidence relative to consumer(practitioner)*** then examine,through a"case illustration"of an initiative in a large school district,a second challenge for evidence usage-conducting viable studies and interpreting outcomes from comprehensive interventions in complex educational ***:Despite attention being given to rigorous evidence,consumers report preferring peer recommendations and local pilot studies as *** our case illustration,we found that the availability of evidence from comprehensive formative evaluation studies was viewed by stakeholders as positively contributing to program implementation quality and sustainability over ***/Value:We use a real-world"case illustration"of a complex initiative in a large,diverse school district to illustrate how current policies and expectations regarding evidence support for educational programs is filtered through multiple agendas and personal needs of key ***,evaluators acquire nontraditional roles that go beyond routine execution of rigorous *** these factors,we offer recommendations for fostering more meaningful and objective interpretations and usage of evidence by local stakeholders.

关键词： Evidence of effectiveness program evaluation technology integration

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