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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-wei 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 was used to model the pH/temperature decline for those carcasses which 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） were sampled, along with the same numbers of normal pHu and intermediate pHu carcasses （5.40-5.79; 5.80-6.10, respectively）, to examine color development within 24 h postmortem. It was shown that 66.7% of the modeled carcasses were outside the ideal pH/temperature window with a temperature@pH6.0 lower than ideal, suggesting the need for acceleration of the pH decline. The stable and low a^＊, b^＊ and chroma values of high pHu beef within 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

Dual-energy X-ray absorptiometry scans accurately predict differing body fat content in live sheep

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Journal of Animal science and Biotechnology 2019年第1期10卷 248-253页

作者： david W Miller Ellen J Bennett Joanne l Harrison Fiona Anderson Clare l Adam school of Veterinary and life sciences Murdoch University scotland’s Rural College (sRUC) Peter Wilson Building The Faculty of Health University of Tasmania school of Biological sciences University of Aberdeen Rowett Institute of Nutrition and Health University of Aberdeen

Background: There is considerable interest in implementing mobile scanning technology for on-farm body composition analysis on live *** experiments evaluated the use of dual energy X-ray absorptiometry(DXA) as an accurate method of total body fat measurement in live ***: In Exp.1,visceral and whole body fat analysis was undertaken in sheep with body condition scores(BCs)in the range 2 to 3.25(scale 1: thin to 5: fat).The relationship of BCs was moderately correlated with visceral fat depot mass(r = 0.59,P le body fat(r = 0.70,P sheep with BCs in the range 2.25 to 3.75 were blood sampled to analyse circulating leptin concentrations,and were DXA scanned immediately post mortem for total body *** leptin concentrations had low correlations with BCs(r = 0.50,P lation with chemical body fat(r = 0.17,P > 0.05,n = 9).There was a moderate correlation between DXA body fat and BCs(r = 0.70,P s highly correlated with chemical body fat(r = 0.81,P series of five DXA scans,at 8-week intervals,was performed on growing sheep over a 32-week *** average BCs ranged from 2.39 ± 0.07(s.E.M.) to 3.05 ± 0.11 and the DXA body fat(%) ranged from 16.8 ± 0.8 to 24.2 ± *** was a moderate correlation between DXA body fat and BCs over the 32 weeks(r = 0.61,P lusions: Overall,these experiments indicated that there was good agreement between BCs,DXA and chemical analysis for measuring total body fat in sheep,and that DXA scanning is a valid method for longitudinal measurement of total body fat in live sheep.

关键词： BCs DEXA Fat leptin longitudinal sheep

Effect of liquid viscoelasticity on the interactions between cavitation bubbles and free surfaces

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Journal of Hydrodynamics 2023年第5期35卷 887-898页

作者： Yang liu Zhi-ying Zheng Zhi-bo He Tian-bao Zeng david Ezekoye wei-hua Cai Hong Qi school of Energy science and Engineering Harbin Institute of TechnologyHarbin150001China school of Civil Engineering Harbin Institute of TechnologyHarbin150090China school of Energy and Power Engineering Northeast Electric Power UniversityJilin132012China

The influence of liquid viscoelasticity on the interaction between cavitation bubbles and free surfaces is of great practical significance in understanding bubble dynamics in biological systems. A series of millimeter cavitation bubbles were induced by laser near the free surfaces of the water and viscoelastic polyacrylamide (PAM) solutions with different concentrations. The effects of liquid viscoelasticity on the interactions of cavitation bubbles with free surfaces are analyzed from the perspectives of the evolution of free surface and bubble dynamics. The experimental results show that as the dimensionless standoff distance increases, the evolutions of free surface behaviors in all experimental fluids can be divided into six types of water mounds, i.e., breaking wrinkles, spraying water film, crown, swallowed water spike, hillock, and slight bulge. All the critical values of the dimensionless distance dividing different types decrease with increasing concentration. The evolutions of first four types of water mounds in PAM solutions differ from those in the water. Water droplets splashing in different directions are produced around the breaking wrinkles in the water. Meanwhile, the breaking wrinkles in PAM solution move with the “liquid filaments” towards the central axis. The water spike in the pattern of spraying water film in PAM solution is more stable than that in the water. As the solution concentration increases, the water skirt in the pattern of crown contracts earlier and faster, and the rate of increase in the height of the water skirt decreases. For swallowed water spike in PAM solution, the upper part of the newly formed water spike is not significantly thicker than the middle part, and thus the water waist structure does not form. liquid viscoelasticity inhibits the bubble growth and collapse, and the bubble migration as well, especially in the second period. shorter and thicker cavities are formed in PAM solutions with higher concentration, while sl

关键词： Viscoelasticity cavitation bubble free surface water mound bubble dynamics

High Altitude Frogs (Rana kukonoris) Adopt a Diversified Bethedging strategy in the Face of Environmental Unpredictability

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Asian Herpetological Research 2018年第1期9卷 43-49页

作者： wei CHEN liqing PENG lichun JIANG david A.PIKE Christopher R.FRIEsEN Gregory BROWN Ecological security and Protection Key laboratory of sichuan Province Mianyang Normal University Department of Biology Rhodes College school of life and Environmental sciences University of Sydney

Environmental unpredictability can influence strategies of maternal investment among eggs within a clutch. Models predict that breeding females should adopt a diversified bet-hedging strategy in unpredictable environments, but empirical field evidence from Asia is scarce. Here we tested this hypothesis by exploring spatial patterns in egg size along an altitudinal gradient in a frog species （Rana kukunoris） inhabiting the Tibetan Plateau. Within-clutch variability in egg size increased as the environment became variable （e.g., lower mean monthly temperature and mean monthly rainfall at higher altitudes）, and populations in environments with more unpredictable rainfall produced eggs that were smaller and more variable in size. We provide support for a diversified bet-hedging strategy in high-altitude environments, which experience dynamic weather patterns and therefore are of unpredictable environmental quality. This strategy may be an adaptive response to lower environmental quality and higher unpredictable environmental variance. such a strategy should increase the likelihood of breeding success and maximize maternal lifetime fitness by producing offspring that are adapted to current environmental conditions. We speculate that in high-altitude environments prone to physical disturbance, breeding females are unable to consistently produce the optimal egg size due to physiological constraints imposed by environmental conditions （e.g., duration of the active season, food availability）. species and populations whose breeding strategies are adapted to cope with uncertain environmental conditions by adjusting offspring size and therefore quality show a remarkable degree of ability to cope with future climatic changes.

关键词： altitude bet-hedging strategy environmental quality egg size within-clutch variation unpredictable environment

Infliximab treatment in two Chinese patients with psoriatic arthritis

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Journal of Zhejiang University-science B(Biomedicine & Biotechnology) 2010年第10期11卷 779-782页

作者： Xi XIE Jin-wei CHEN Fen lI Jing TIAN Jie-sheng GAO david ZHANG Department of Rheumatology the Second Xiangya Hospital Central South University Changsha 410011 China Department of Bioengineering University of Washington Seattle Washington 98195 USA

Psoriatic arthritis(PsA) is a rheumatoid factor(RF)-seronegative systemic inflammatory disorder associated with *** treatment for PsA in China is still focused on disease modifying anti-rheumatic drugs(DMARDs).In this paper,we report two Chinese patients with active longstanding PsA treated with infliximab,a human-mouse chimeric monoclonal antibody against tumor necrosis factor alpha(TNF-α).The results show that infliximab acted quickly and effectively in relieving peripheral and axial symptoms and refractory skin lesions,even in recombinant human TNF-α receptor(rhTNFR)-resistant *** take-home message from our cases is that infliximab is a useful therapeutic option for refractory PsA,especially when a patient has a combination of psoriasis and psoriatic *** local evidence and experience must be accumulated in order to make anti-TNF-α therapy more accessible to PsA patients in China.

关键词： Refractory psoriatic arthritis skin lesions Infliximab Anti-tumor necrosis factor alpha (TNF-α) treatment

A multi-sensor appiproach to calving detection

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Information Processing in Agriculture 2024年第1期11卷 45-64页

作者： Anita Z.Chang david l.swain Mark G.Trotter Institute for Future Farming systems School of HealthMedicaland Applied SciencesCentral Queensland UniversityRockhamptonQueensland 4700Australia

The advent of remote livestock monitoring systems provides numerous possibilities for improving on-farm productivity,efficiency,and *** potential application for these systems is for the detection of calving *** study describes the integration of data from multiple sensor sources,including accelerometers,global navigation satellite systems(GNss),an accelerometer-derived rumination algorithm,a walk-over-weigh unit,and a weather station for parturition detection using a support vector machine *** best performing model utilised data from GNss,the ruminating algorithm,and weather stations to achieve 98.6%accuracy,with 88.5%sensitivity and 100%*** topranking features of this model were primarily GNss *** study provides an overview as to how various sensor systems could be integrated on-farm to maximise calving detection for improved production and welfare outcomes.

关键词： Accelerometer GNss GPs Rumination sensor WOW

A Novel lifecycle Model for Web-based Application Development in small and Medium Enterprises

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International Journal of Automation and computing 2010年第3期7卷 389-398页

作者： wei Huang Ru li Carsten Maple Hong-Ji Yang david Foskett Vince Cleaver Department of Computer science and Technology University of Bedfordshire Luton LU1 3JU UK Exxcom ltd Kingsmede House Bedfordshire SG17 5DB UK software Technology Research laboratory De Montfort University Leicester LE1 9BH UK

software engineering＇s lifecycle models havc proven to be very important for traditional software development. However, can these models be applied to the development of Web-based applications as well？ In recent years, Web-based applications have become more and more complicated and a lot of efforts have been placed on introducing new technologies such as J2EE, PhP, and .NET, etc., which have been universally accepted as the development technologies for Web-based applications. However, there is no universally accepted process model for the development of Web-based applications. Moreover, shaping the process model for small medium-sized enterprises （sMEs）, which have limited resources, has been relatively neglected. Based on our previous work, this paper presents an expanded lifecycle process model for the development of Web-based applications in sMEs. It consists of three sets of processes, i.e., requirement processes, development processes, and evolution processes. Particularly, the post-delivery evolution processes are important to sMEs to develop and maintain quality web applications with limited resources and time.

关键词： Web development of Web-based applications lifecycle models small medium-sized enterprises (sMEs).

Antiviral Effects of stichopus japonicus Acid Mucopolysaccharide on Hepatitis B Virus Transgenic Mice

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Journal of Ocean University of China 2016年第4期15卷 719-725页

作者： XIN Yongning lI wei lU linlin ZHOU li david W Victor XUAN shiying Qingdao Municipal Hospital Qingdao 266071 P. R. China Department of Gasteroenterology Qingdao No.6 People's Hospital Qingdao 266033 P. R. China Taiyuan Infectious Diseases Hospital Taiyuan 030000 P. R. China Hepatology & Transplant Medicine Department of Medicine Houston Methodist Hospital Houston USA

Hepatitis B virus(HBV) is a significant global pathogen and efficient cure for HBV patients is still a challenging goal. We previously reported that acidic mucopolysaccharide from stichopus japonicus selenka(sJAMP) could inhibit HBs Ag and HBe Ag expression in vitro. However, the potential anti-HBV effects of sJAMP in vivo have not yet been explored. In this study, we show that sJAMP exhibits potent anti-HBV activity in HBV transgenic mice in a dose-dependent manner. specifically, sixty HBV transgenic male BAlB/c mice were randomly selected to receive the treatment of PBs, low dose sJAMP(30 mg kg^(-1)), middle dose sJAMP(40 mg kg^(-1)), high dose sJAMP(50 mg kg^(-1)) and IFN(45 IU kg^(-1)) for 30 d. sJAMP treatment suppressed serum HBV-DNA, and liver HBs Ag and HBc Ag levels in HBV-transgenic mice. The present study highlights the potential application of sJAMP in HBV therapy.

关键词： Transgenic transgenic pathogen challenging suppressed potent highlights brown manner inhibit

Drag on Hydroid-Fouled Nets – An Experimental Approach

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China Ocean Engineering 2015年第3期29卷 369-389页

作者： Pl lADER david W. FREDRIKssON Jana GUENTHER Zsolt VOlENT Nina BlOCHER david KRIsTIANsEN lars GANsEl Jud DECEW sINTEF Fisheries and Aquaculture United states Naval Academy University of New Hampshire

The present study investigated the drag increase on aquaculture nets due to biofouling of the colonial hydroid Ectopleura larynx. It had two main parts： firstly the growth characteristics of E. larynx were investigated by use of field tests at a Norwegian aquaculture site; secondly the hydrodynamic drag on the fouled twines was studied in a towing tank by using fabricated models of net twines with artificial hydroid fouling. In the field tests, the growth of the hydroids was first measured after three weeks of immersion and then again after six weeks. During this interval, the density of hydroids and the thickness of the hydroid stem were almost constant（1.4 hydroids/mm and 0.29 mm, respectively）, while the average length of the hydroids increased from 6.4 to 11.2 mm. The hydroid length followed a Rayleigh distribution, while the thickness was normal（Gaussian） distributed. Replicas of twines with three different levels of hydroid growth were made（1.5 hydroids/mm twine, hydroid length 9 mm, 16 mm and 20 mm）, and the drag on these twines was measured at different towing velocities（0.1 to 1.4 m/s） and with different twine configurations. For the twine with the shortest hydroids（9 mm）, the drag was from 1.5 times（Re=4000） to 2.2 times（Re=1000） the drag on a clean twine. For the longest hydroids（21 mm）, the drag was 2 times and 3.8 times, respectively.

关键词： hydroid biofouling aquaculture net hydrodynamic drag