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Hotspot of Adult Cuban Treefrog and Cane Toad Multi-organ Abnormality in Suburban South-west Florida

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Asian Herpetological Research 2020年第2期11卷 139-154页

作者： Sharon pratt ANZALDUA Javier GOLDBERG Private University 27427 Horne Ave Bonita SpringsFlorida 34135USA Instituto de Bio y Geociencias del NOA(IBIGEO-CONICET) CCT-Salta9 de Julio 14Rosario de LermaSalta 4405Argentina

This study represents a continuation of the Florida hotspot of tadpole abnormality found in the Southwest Florida suburban roadside drainage ditches in 2012 to determine if the adult frogs and toads frequenting the study sites were anatomically *** gross examination of all organs included 397 adult anurans and 40 metamorphs representing five anuran species:Osteopilus septentrionalis(N=364),Rhinella marina(N=60),Lithobates sphenocephala(N=7),Anaxyrus terrestris(N=5)and Anaxyrus americanus(N=1).The gonads,liver,kidney and intestines were abnormal at a frequency of 87.4%.The few normal anurans(12.6%)were females and young male *** found a significant difference in organ abnormality type and f requency between *** all f rog and toad males had testicular abnormality(92%)with only 6%with normal testes,whereas the female gonad abnormality was lower,at 41.6%.Hermaphroditism was found in both sexes at a frequency of 26.2%.The toads had a significantly higher frequency of hermaphroditism than the *** toad hermaphroditism frequency was found to be 40%,whereas the frog hermaphroditism 23.3%.A hermaphrodite Cane toad male with a female phenotype coexisted with the normal male phenotype *** fertility of 27 in situ pairs was *** fertile testicular abnormal male and hermaphrodite pairs produced offspring with abnormal larval *** information adds new evidence of the effect of chemicals on wild populations and the effect on non-target species which has always been underestimated.

关键词： gonad hermaphrodite malformation Osteopilus septentrionalis Rhinella marina

What’s new in the 2020 World Health Organization Guidelines on Physical Activity and Sedentary Behavior?

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Journal of Sport and Health Science 2021年第3期10卷 288-289页

作者： Michael pratt Herbert Wertheim School of Public Health&Human Longevity Science University of California San DiegoLa JollaCA 92093-0628USA

Toward the end of 2020,the World Health Organization(WHO)released a new set of guidelines for physical activity and sedentary behavior.1 For any aspect of health,recognition by the WHO seems a good thing,and for the oft underappreciated field of physical activity,especially *** can we make of these guidelines?How much is really new?How strong is the science behind the guidelines?And will these guidelines really make a difference in population health around the world?In the following paragraphs,we will briefly address each of these questions.

关键词： really tar Health

Exchange of Parametric CAD Models

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武汉理工大学学报 2006年第S1期28卷 121-125页

作者： pratt J Michael SRIRAM D Ram Design and Process Group National Institute of Standards and TechnologyGaithersburgMD 20899-0001USA

A method to exchange digital CAD model construction history data using ISO10303 is presented. The primary intention of this research is to demonstrate the utility of ISO10303-108 in achieving parametric CAD model exchange between commercial CAD systems. ISO10303-108,still under development,has been used to represent geometric and dimensional constraints on the sketch profile. Schemas from Parts 42,50 of ISO 10303 are also used. ISO10303-42 is adopted to represent geometric and topological information and ISO10303-50 is used to represent the mathematical expression.

关键词： CAD model exchange construction history parameters constraints

Comparison of sublingual microcirculatory parameters measured by sidestream darkfield videomicroscopy in anesthetized pigs and adult humans

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Animal Models and Experimental Medicine 2023年第5期6卷 499-503页

作者： Raushan Lala Ryan Homes Shaun pratt Wendy Goodwin Mark Midwinter School of Biomedical Sciences The University of QueenslandSt LuciaQldAustralia School of Veterinary Sciences The University of QueenslandGattonQldAustralia Jamieson Trauma Institute Royal Brisbane and Women's HospitalHerstonQldAustralia Traumatic Injury Sciences Group The University of QueenslandSt LuciaQldAustralia

Background:This study aimed to compare sublingual microcirculatory parameters between anesthetized pigs and conscious adult humans using sidestream darkfield *** overarching aim of the work was to validate the pig as an experimental model of changes in microcirculatory function following traumatic haemorrhagic shock and ***:Fourteen large white pigs and 14 humans were recruited for the *** sidestream darkfield videomicroscopy clips were captured in anesthetized pigs and conscious *** underwent manual analysis in Automated Vascular Analysis 3.2 *** total vessel density(TVD),perfused vessel density(PVD),proportion of perfused vessels(PPVs)and microvascular flow index(MFI)were *** independent samples t test was used for between species comparison of microcirculatory *** and Conclusions:Conscious humans had a significantly lower TVD,PVD and MFI than anesthetized *** significant difference in PPVs was observed between the *** of the microcirculation is a critical determinant of tissue metabolic function and *** it may not be surprising that some inter species differences in the sublingual microcirculatory anatomy were identified between pig and human subjects,it is interesting to report the insignificant difference in *** direct microcirculatory measure represents a relative change which should hold translatable value across *** therefore conclude the pig is a suitable model for microcirculatory research and may be a suitable species to investigate changes in microcirculatory perfusion following perturbations in cardiovascular homeostasis,for example during traumatic haemorrhagic shock and resuscitation.

关键词： comparative anatomy microcirculation sidestream darkfield videomicroscopy

Constraining the high density nuclear equation of state with femtoscopic pion correlations

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Science China(Physics,Mechanics & Astronomy) 2023年第5期66卷 208-208页

作者： Scott pratt Department of Physics and Astronomy and Facility for Rare Isotope Beams Michigan State UniversityEast LansingMichigan 48824USA

The equation of state is the most fundamental property of nuclear matter,and plays a principal role in understanding stellar evolution and interpreting recent observations of neu-tron *** equation of state for 2-4 times normal nuclear density plays a particularly critical ***,such densities can be attained in terrestrial experiments by collid-ing heavy ions,such as gold or lead,at high energy.

关键词： energy equation state

PUBLIC INVESTMENT IN AGRI-FOOD SYSTEM INNOVATION FOR SUSTAINABLE DEVELOPMENT

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Frontiers of Agricultural Science and Engineering 2023年第1期10卷 124-134页

作者： Gert-Jan STADS Alejandro NIN-pratt Keith WIEBE Timothy BSULSER Rui BENFICA International Food Policy Research Institute Washington DC 20005USA

Research is essential for improvement of agricultural productivity,resource use and resilience,and for food systems transformation more *** article analyzes the drivers of past agricultural productivity growth in low-and middle-income countries(LMICs)and argues that productivity is not growing fast enough to meet the needs of a global population of 10 billion by 2050.A sustainable transformation of agri-food systems in LMICs will need greater and faster technical *** investment in agri-food R&D is therefore needed to accelerate productivity growth and address the social,economic,nutritional and environmental challenges facing *** and bettertargeted investment in sustainable technologies and climate change mitigation and adaptation will be particularly important to reducing the climate change impacts on agriculture and food security in the coming ***,LMICs with small research systems and limited innovation capacity lack the scale and resources to effectively tackle the challenges *** coordination and a clear articulation of roles and responsibilities among national,subregional,regional and global R&D actors(both from the public and private sectors)are essential to ensuring that scarce financial,human,and infrastructure resources are optimized,duplications minimized,and synergies and complementarities enhanced.

关键词： agri-food system innovation R&D investment productivity climate change

Population structure of the Atlantic sand fiddler crab Uca pugilator along the eastern coast of US revealed by molecular data

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Current Zoology 2009年第2期55卷 150-157页

作者： David A. WEESE Denson K. MCLAIN Ann E. pratt Quentin Q. FANG Department of Biological Sciences Auburn University Department of Biology Georgia Southern University

The Atlantic sand fiddler crab Uca pugilator is an extremely abundant crab found along the eastern coast of the United States. Fiddler crabs have a life cycle with an obligatory planktonic larval phase of 30-90 days,which might be expected to lead to widespread larval dispersal and consequent genetic homogeneity over considerable distances. However,a large amount of morphological and behavioral variation is found between northern and southern populations along the eastern coast. This study was undertaken to determine the population genetic structure of *** and to determine whether these differences may have a genetic basis. The population structure of the fiddler crab was analyzed using 472 individuals collected from 12 sites along the eastern coast. PCR-based single stand conformation polymorphism (SSCP) was used to investigate between-site variation in the mitochondrial 16S rRNA gene of these individuals. Analysis of genetic variation indicated frequent gene flow between nearby localities,but much reduced levels between populations separated by larger geographic distances. Thus,despite the potential for high dispersal by planktonic larvae,population differentiation and isolation by distance is evident between northern and southern populations of ***. A high amount of genetic differentiation (F ST =0.3468) was found between northern and southern regions suggesting that the morphological and behavioral differences between these two regions have a genetic basis and may represent subspecies.

关键词： Atlantic sand fiddler crab Uca pugilator Deeapoda Molecular population genetics Gene flow SSCP 16S rDNA

Digital Image Processing: PIKS Inside,3rd edition 3rd ed.

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2001年

作者： William pratt

ISBN: (纸本)9789814126205

From the Publisher: Today, image processing has become a vital, cost-effective technology in a host of applications. This Second Edition covers these new developments in this dynamic field. Five sections explore the characterization of continuous images, image sampling and quantization techniques along with the mathematical representation of discrete images, two-dimensional signal processing techniques, image enhancement and restoration techniques and image analysis.

关键词： Image processing

来源：畅想之星图书光盘版（南... 评论

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β-内酰胺抗生素的生物合成

国外医药（抗生素分册） 1991年第5期12卷 329-335,337页

作者： pratt A J

一、概况青霉素G及V、头孢菌素C、头霉素C生物合成的初始阶段都一样,这些化合物的生物合成全过程见图1。Ingolia及Queener(1988)提出了生物合成基因的分类命名、青霉素和头孢菌素相同的生物合成基因,命名为Pcb(青霉素/头孢菌素生物合成)... 详细信息

一、概况青霉素G及V、头孢菌素C、头霉素C生物合成的初始阶段都一样,这些化合物的生物合成全过程见图1。Ingolia及Queener(1988)提出了生物合成基因的分类命名、青霉素和头孢菌素相同的生物合成基因,命名为Pcb(青霉素/头孢菌素生物合成),只限于青霉素或头孢菌素的,分别命名为pen及cef。L-α-氨基己二酸、L-半胱氨酸及L-缬氨酸的酶缩合,伴同发生缬氨酸的异构化而成为D型。在半纯化的酶提取液中。

关键词： β内酰胺类抗生素生物合成