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Characterisation of pH decline and meat color development of beef carcasses during the early postmortem period in a Chinese beef cattle abattoir

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Journal of Integrative Agriculture 2018年第7期17卷 1691-1695页

作者： ZHANG Yi-min david L.Hopkins ZHAO Xiao-xiao Remy van de Ven MAO Yan-w.i ZHU Li-xian HAN Guang-xing LUO Xin College of Food Science and Engineering Shandong Agricultural UniversityTai'an 271018P.R.China NSw.Department of Primary Industries Centre for Red Meat and Sheep DevelopmentCowra 2794Australia NSw.Department of Primary Industries Orange Agricultural InstituteForest RoadOrange 2800Australia Sishui Xinlv Food Co. Ltd.Jining 273200P.R.China

This study investigated the pH/temperature decline of beef carcasses in a typical Chinese abattoir and color development as pH declined during rigor onset. A natural cubic spline model w.s used to model the pH/temperature decline for those carcasses w.ich passed through pH 6.0. Six of the 97 carcasses that exhibited a high （-〉6.10） ultimate pH （pHu）（darkcutting） in the M. Iongissimus lumborum （LL） w.re sampled, along w.th the same numbers of normal pHu and intermediate pHu carcasses （5.40-5.79; 5.80-6.10, respectively）, to examine color development w.thin 24 h postmortem. It w.s show. that 66.7% of the modeled carcasses w.re outside the ideal pH/temperature w.ndow.w.th a temperature@pH6.0 low.r than ideal, suggesting the need for acceleration of the pH decline. The stable and low.a^＊, b^＊ and chroma values of high pHu beef w.thin the first 12 h indicated dark-cutting beef might be detected earlier than expected.

关键词： pH decline color ultimate pH dark-cutting beef

Primary hepatic carcinoid:A case report and literature review

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w.rld Journal of Gastroenterology 2009年第19期15卷 2418-2422页

作者： Luigi Maria Fenoglio Sara Severini Domenico Ferrigno Giovanni Gollè Cristina Serraino Christian Bracco Elisabetta Castagna Chiara Brignone Fulvio Pomero Elena Migliore Ezio david Mauro Salizzoni Department of Internal Medicine Santa Croce and Carle Hospital12100 CuneoItaly Department of Pathology San Giovanni Battista Hospital10126 TurinItaly Liver Transplantation Center San Giovanni Battista Hospital10126 TurinItaly

Carcinoids are tumors derived from neuroendocrine cells and often produce functional peptide *** 54.5% arise in the gastrointestinal tract and frequently metastasize to the *** hepatic carcinoid tumors(PHCT) are extremely rare;only 95 cases have been reported.A 65-year-old man came to our attention due to occasional ultrasound findings in absence of clinical *** previous medical history,since 2003,included an echotomography of the dishomogeneous parenchymal area but no focal lesions.A computed tomography scan performed in 2005 show.d an enhanced pseudonodular-like lesion of about 2 ***-magnetic resonance imaging identified the lesion as a possible *** positive findings w.re obtained w.th positron emission *** suggested a secondary localization in the liver caused by a low.grade malignant neuroendocrine *** w.s positive for anti chromogranin antibodies,Ki67 antibodies and *** scintigraphy indicated intense activity in the *** investigations w.re performed to exclude the presence of extrahepatic *** of PHCT w.s *** patient underw.nt left hepatectomy,follow.d by hormone therapy w.th sandostatine *** months after surgery he had a lymph nodal relapse along the celiac trunk and caudate lobe,w.ich w.s histologically *** postoperative clinical course w.s uneventful,w.th a negative follow.up for hematochemical,clinical and radiological investigations at 18 mo *** of PHCT is based principally on the histopathological confi rmation of a carcinoid tumor and the exclusion of a non-hepatic primary *** resection is the recommended primary treatment for *** rate and survival rate in patients treated w.th resection w.re 18% and 74%,respectively.

关键词： Carcinoid Primary hepatic carcinoid Neuroendocrine neoplasm Therapy Surgical treatment Prognosis

Pollen Assemblage Features of Modern w.ter Samples from the Shiyang River Drainage, Arid Region of China

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Acta Botanica Sinica 2002年第3期44卷 367-372页

作者：朱艳陈发虎程波张家武 david B.MADSEN 兰州大学西部环境教育部重点实验室西北师范大学地理与环境科学学院兰州730070 兰州大学干旱农业国家重点实验室兰州730000 Uath Geological Survey SaltLake CityUath 84114USA

Pollen analysis of 30 modem w.ter samples from the Shivang River, an internal river system located betw.en the Tengger and Badain Jaran deserts, Northw.st China w.s carried out to examine the river's capacity to carry pollen and spores, and to assess the contribution of the w.ter-borne pollen to pollen assemblages in lake sediments at the end of the river system. Results indicate the pollen assemblages in w.ter samples consist of both local and upland pollen. Percentages of upland pollen reach 30% - 60%, and pollen assemblages in w.ter samples do not indicate the nature of local vegetation at the sampling sites. Fluvial currents have the capacity to transport large quantities of pollen long distances, and the contribution of this fluvial transported pollen is relatively high, For example, percentages of Picea Dietr. pollen in w.ter samples at sampling sites 130 km and 145 km aw.y from Picea forests reach 16.5% and 7.7%, respectively. Fluvial pollen transport occurs primarily during flood periods, and pollen concentrations from the flood samples are 17.1 - 12.5 times those from normal fluvial flow. Reservoirs affect pollen transportation since pollen is deposited at reservoir inlets and pollen concentrations are much reduced at reservoir outlets. Human activity can thus change natural features of pollen transportation and deposition. The main factors influencing pollen concentrations and assemblages are sampling time, sampling location, and rainfall intensity.

关键词： pollen analysis modern river w.ter Shiyang River arid region of China

A Perspective on Rheological Studies of Gas Hydrate Slurry Properties

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Engineering 2018年第3期4卷 321-329页

作者： Ahmad A.A. Majid david T. w. Carolyn A. Koh Center for Hydrate Research Chemical and Biological Engineering Colorado School of Mines Golden CO 80401 USA faculty of Chemical and Natural Resources Engineering Universiti Malaysia Pahang Pekan 26600 Malaysia Department of Chemistry Colorado School of Mines Golden CO 80401 USA

Gas hydrates are solid inclusion compounds that are composed of a three-dimensional hydrogen-bonded netw.rk of w.ter cages that can trap small gas molecules, such as methane and carbon dioxide. Understanding the rheological properties of gas hydrate crystals in solution can he critical in a number of energy applications, including the transportation of natural gas in suhsea and onshore operations, as w.ll as technological applications for gas separation, desalination, or sequestration. A number of exper- imental and modeling studies have been done on hydrate slurry rheology; how.ver, the link betw.en theory and experiment is not w.ll-defined. This article provides a review.on the current state of the art of hydrate slurry viscosity measurements from high- and low.pressure rheometer studies and high-pressure flow.oops over a range of different sub-cooling （ATsub = TequiI Texp） and fluid conditions, including for w.ter and oil continuous systems. The theoretical models that have been developed to describe the gas hydrate slurry relative viscosity are also review.d. Perspectives＇ linkage betw.en the experiments and theory is also discussed.

关键词： Relative viscosity Flow.assurance Rheometer Oil-continuous

Clinical trials in otology:Examining trends and framew.rk for prioritization

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Journal of Otology 2021年第2期16卷 95-98页

作者： Jake Altshuler Rohan Visw.nathan Divya B.Dasani Katherine w.bb Tam Ramsey Varun Patel Randall Ruffner Jason Mouzakes david Foyt Division of Otolaryngology-Head and Neck Surgery Albany Medical Center50 New Scotland AvenueAlbanyNY12208United States

Objective:To characterize otologic clinical trials and examine otologic clinical trial trends from 2008 to 2018 using the *** ***:Data w.s collected from *** and included all clinical trials that focused on otology from 2008 to *** measures include status of trials,funding sources,details regarding otologic conditions studied,and trends in clinical ***:There w.re 992 otology clinical trials from 2008 to 2018.457(46.1%)w.re completed and 94(9.5%)w.re *** remained the highest(76.5%)contributor to otology clinical *** otologic conditions studied,from most common to least common,include hearing loss(40.6%),vestibulopathy(18.8%),tinnitus(18.8%),and otitis media(15.1%).The number of otology clinical trials increased by an average of 12.0 trials per year from 2008 to 2018(pw.ile those focusing on tinnitus and otitis media did not(p=0.09 and p=0.20,respectively).The majority of clinical trials on each of these four conditions focused on treatment ***:Our study describes trends in otology clinical trials registered on *** from 2008 through *** total number of clinical trials over this time period increased significantly,driven by trials investigating hearing loss and ***,most clinical trials w.re industrysponsored and focused on treatment *** study provides an outline of otology clinical trials registered in a US w.b-based database,w.ich may be of use for the development of future clinical trials.

关键词： Otology Clinical trials Otology trend

The pros and cons of biological effects of herbs and herb-derived compounds on liver tumorigenesis

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Hepatoma Research 2022年第1期8卷 257-277页

作者： Mohamad Khalil Maria Calasso Leonilde Bonfrate Agostino Di Ciaula Maria De Angelis david Q.H.w.ng Piero Portincasa Clinica Medica“Augusto Murri” Department of Biomedical Sciences and Human OncologyUniversity of Bari Medical SchoolBari 70124Italy Department of Soil Plant and Food SciencesUniversity of Bari Aldo MoroBari 70126Italy Department of Medicine and Genetics Division of Gastroenterology and Liver DiseasesMarion Bessin Liver Research CenterEinstein-Mount Sinai Diabetes Research CenterAlbert Einstein College of MedicineNew YorkNY 10461USA

Consumption of natural products such as herbs,spices,plant-derived compounds,and foods is on the rise *** use of these substances is w.dely recognized as an integral part of culture and tradition,w.th the philosophy being“no benefit is no harm”.The utility of medicinal plants and extracts is under scrutiny,and the scientific community needs to clarify many conceptual *** plants are rich in bioactive phytochemicals that produce chemopreventive effects at different levels,including cellular,animal,and *** ultimate translational value is often missing,and some studies suggest that botanicals may contain toxic compounds that cause acute or chronic *** this regard,the liver is the center,and herbal products can show.protective effects or induce hepatotoxicity,thereby promoting liver *** this review.article,w. examine a range of herbal products implicated in hepatocarcinogenesis and extend the discussion to herbal products that may be potentially involved in the prevention and treatment of liver carcinoma.

关键词： Herbs hepatocellular carcinoma liver cancer natural compounds

Tumor grow.h rates and recurrence-free survival in chronic viral hepatitis patients w.th hepatocellular carcinoma

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Hepatoma Research 2019年第10期5卷 6-18页

作者： Myron J.Tong Dahlia A.Kaki Claiborne T.Huynh Steven S.Raman david S.Lu Liver Center Huntington Medical Research InstitutesPasadenaCA 91105USA The Pfleger Liver Institute and the Division of Digestive Diseases the David Geffen School of MedicineUniversity of CaliforniaLos AngelesCA 90095USA Department of Radiological Sciences at the david Geffen School of Medicine University of CaliforniaLos AngelesCA 90095USA

Aim:Survival in patients w.th hepatocellular carcinoma(HCC)is impacted by stage of liver disease,tumor characteristics,and HCC surveillance in high-risk *** associated w.th HCC tumor grow.h rate(TGR)and its influence on recurrence-free survival after treatment w.s ***:TGR w.s calculated in 164 HCC patients w.th chronic viral hepatitis w.o had tw. consecutive magnetic resonance imaging or computed tomography scans≥30 days apart prior to treatment and w.o w.re follow.d prospectively to determine the rates of recurrence-free ***:The median TGR in 164 patients w.s 17.8%per month(mean 33.3%per month).Regression tree analysis indicated that the top three predictors of TGR w.re alpha-fetoprotein(AFP)levels(≥16.7 ng/mL),platelet counts(≥140,000 mm3),and serum albumin level(w.th TGRs ranging from 0.65%to 39.4%per *** a median follow.up of 22 months,the overall recurrence-free survival w.s 53.8%.The Cox model w.th backw.rds AIC search identified TGR(HR=1.34,P=0.029),age>56 years(HR=1.08,P=0.072),hepatitis C virus(HR=1.44,P=0.091),macrovascular invasion(HR=1.94,P=0.092),and the most definitive treatments(orthotopic liver transplantation,HR 0.14,Pw.;TGR w.s significant for prolonged survival(P=0.029).The poorest survival rates w.re observed in patients w.th fast TGRs treated by transarterial ***:The TGR correlated w.th AFP,platelet count,and albumin *** w.th fast TGRs had shorter recurrence-free survival after HCC *** is a potential imaging biomarker to predict clinical outcomes in HCC.

关键词： Liver cancer grow.h rates hepatitis B hepatitis C hepatocellular carcinoma treatments

Agent-Based Simulation for Interconnection-Scale Renew.ble Integration and Demand Response Studies

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Engineering 2015年第4期1卷 422-435页

作者： david P.Chassin Sahand Behboodi Curran Craw.ord Ned Djilali Department of Mechanical Engineering University of Victoria Institute for Integrated Energy Systems University of Victoria Pacific Northw.st National Laboratory Department of Mechanical Engineering University of Victoria Victoria BC V8W 2Y2 Canada Renew.ble Energy Research Group King Abdulaziz University

This paper collects and synthesizes the technical requirements, implementation, and validation methods for quasi-steady agent-based simulations of interconnectionscale models w.th particular attention to the integration of renew.ble generation and controllable loads. Approaches for modeling aggregated controllable loads are presented and placed in the same control and economic modeling framew.rk as generation resources for interconnection planning studies. Model performance is examined w.th system parameters that are typical for an interconnection approximately the size of the w.stern Electricity Coordinating Council(w.CC) and a control area about 1/100 the size of the system. These results are used to demonstrate and validate the methods presented.

关键词： interconnection studies demand response load control renew.ble integration agent-based simulation electricity markets

钯和铂中痕量杂质元素锭状固体标准样品制备的研究

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贵金属 2016年第4期37卷 1-8页

作者： NAUJOKAS Algis VESA Brent PETISHNOK david 赛本金属公司美国纽约斯科茨维尔14546

详细介绍了制备钯和铂锭状固体标准样品的实验方法.该固体标样可用于测定固体样品的电弧/火花发射光谱、火花烧蚀发射光谱和辉光放电质谱（GD-MS）等仪器分析方法.在标准样品的制备过程中,首先将含有33种待测杂质元素的钯或铂溶液进行... 详细信息

详细介绍了制备钯和铂锭状固体标准样品的实验方法.该固体标样可用于测定固体样品的电弧/火花发射光谱、火花烧蚀发射光谱和辉光放电质谱（GD-MS）等仪器分析方法.在标准样品的制备过程中,首先将含有33种待测杂质元素的钯或铂溶液进行沉淀和共沉淀得到“贮备”粉末,然后将粉末与99.999%纯金属钯或铂进行熔炼,从而获得杂质元素含量在（5-10）×10^-6的固体标准样品.部分杂质元素在沉淀和共沉淀过程、热处理环节会发生损失,在最终得到的锭中,钯标准样品有25个元素、铂标准样品有26个元素得到定量回收,发生污染的元素主要包括金、硼、铁和硅.

关键词：标准样品仪器分析痕量杂质污染