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Milk Replacer Acidification for Free-Access Feeding: Effects on the Performance and Health of Veal Calves

Open j.urnal of Animal Sciences 2016年第3期6卷 234-246页

作者： Cynthia G. Todd Ken E. Leslie Suzanne T. Millman j.n M. Sargeant Heather Migdal Kathleen Shore Neil G. Anderson trevor j. devries Department of Population Medicine Ontario Veterinary College University of Guelph Guelph ON Canada Department of Veterinary Diagnostic & Production Animal Medicine Iowa State University Ames IA USA Centre for Public Health and Zoonoses University of Guelph Guelph ON Canada Department of Animal Biosciences University of Guelph Guelph ON Canada Grober Nutrition Cambridge ON Canada Ontario Ministry of Agriculture Food and Rural Affairs Veterinary Science and Policy Unit Elora ON Canada

Obj.ctives of this study were to investigate the effects of milk replacer (MR) acidification for free- access feeding on pre- and post-weaning performance, morbidity and mortality of calves. Calves were randomly assigned to free-access feeding of acidified (ACID, n = 31) or non-acidified (NON, n = 31) MR, and weaned at 42 days. ACIDMR was prepared to pH 4.0 - 4.5 using formic acid. Intakes were measured daily and weights weekly. Samples of ACID and NON MR were analyzed for coliform and aerobic bacterial growth. After weaning, calves transitioned to a grain-fed veal diet, weighed every 2 weeks. At slaughter (approximately 6 months of age), lungs were evaluated for gross pathological changes and dressed carcass weights were obtained. Generalized linear mixed models were constructed to examine the effects of MR acidification. Differences by treatment group for pre- and post-weaning morbidity and mortality were tested using Pearson’s χ2 and Fisher’s exact tests. ACID calves consumed less MR than NON (10.6 vs. 11.7 L/d, P = 0.02). Acidification tended to promote earlier onset of starter ration consumption (32.0 vs. 39.5 d, hazard ratio = 1.5, P = 0.07), but did not affect average daily starter ration or water intakes across the pre-weaning period. ACID and NON calves did not differ for BW at weaning, pre- or post-weaning ADG or dressed carcass weight. ACID MR had less coliform (P < 0.001) and aerobic bacterial growth (P < 0.001) than NON MR, but odds of disease treatment and mortality did not differ. ACID calves tended to have lower odds of pulmonary lesions during post-mortem inspection than NON calves (OR = 0.3, P = 0.07). These results indicate that under free-access feeding conditions, acidification limited bacterial growth and MR intake, but there were no long-term impacts of acidification on calf performance or health. In conclusion, acidification to pH 4.0 - 4.5 will significantly reduce bacterial growth in milk fed to calves.

关键词： Acidified Milk Feeding Free-Access Milk Feeding Health Growth Veal Calves

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In memoriam Roger V Short(31.7.1930-6.8.2021)

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Asian j.urnal of Andrology 2022年第6期24卷 681-683页

作者： trevor G Cooper David j.Handelsman Tuen Mun Hong Kong SARChina ANZAC Research Institute Concord HospitalSydneyNSW 2139Australia

FOREWORD FROM trevor G COOPER Roger V Short,Fellow of the Royal Society(FRS),born in England in 1930,itally trained as a vet at Bristol University,then completed a Fulbright Scholarship in the states and a PhD at the University of *** research in the University's Department of Veterinary Clinical studies until 1972,he became the director of the Medical Research Council Unit of Reproductive Biology in Edinburgh for the next decade,teaming up with Professor David Baird to run a globally renowned research institute where he trained numerous famous *** 2007 to 2014,he was an Editorial Board Member of Asian j.urnal of Andrology.

关键词： Bristol Edinburgh institute

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Effect of Laser Inj.ction Seeder on Rotationally Resolved Spectra of Benzonitrile

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Chinese Physics Letters 2010年第8期27卷 77-79页

作者：徐海峰 j.HNSON Philip M. SEARS trevor j. Institute of Atomic and Molecular Physics 3ilin University~ Changchun 130012 Chemistry Department Stony Brook University Stony Brook NY 11974 USA Department of Chemistry Brookhaven National Laboratory Upton NY 11973 USA

High resolution lasers are necessary to derive the most information from molecular spectra. However, their use uncovers some photophysical processes that compromise the ability to resolve rotational structure. We study the influence of laser optical mode structure on the high resolution spectra of the S1 states of benzonitrile in a supersonic molecular beam using an Ar^＋ pumped cw ring dye laser which is amplified by a pulsed Nd： YA G laser. The latter could be operated either in one optical mode by inj.cting （seeding） its oscillator with a single mode diode laser, or with many optical modes by not using the seeder. Rotationally resolved lines are obtained when the oscillator of the YAG laser are operated in one single optical mode, but only a continuum is seen when the YAG laser has multiple modes. It is argued that the ac Stark effect is the most probable reason for broadening and blurring the rotational lines.

关键词： Lasers Uses Thinning

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Afterword to Semen Analysis in 21st Century Medicine special issue in Asian j.urnal of Andrology

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Asian j.urnal of Andrology 2010年第1期12卷 118-123页

作者： David j. Handelsman trevor G. Cooper Reproductive Endocrinology ＆ Andrology Director ANZA C Research Institute Sydney Australia Andrology Laboratory Institute of Reproductive Medicine of the University Munster Germany

We summarise and comment on the topics discussed by the contributors to this Special Issue. As an introduction, Ann j.quier＇s [ 1 ] generally positive assessment of the new-look manual was tempered with her res- ervations about reference values, on which other chapters dwelt at length. Aspects of laboratory technique were discussed by Charlene Brazil [2], whose offering gives a rare insight into the actual workings of andrology laboratories and highlights the need for greater involvement of laboratory directors （often clinicians） in assessing the quality of data provided.

关键词： no english key word

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Foreword to Semen Analysis in 21st Century Medicine special issue in Asian j.urnal of Andrology

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Asian j.urnal of Andrology 2010年第1期12卷 7-10页

作者： David j. Handelsman trevor G. Cooper Reproductive Endocrinology ＆ Andrology ANZA C Research Institute Sydney Australia Andrology Laboratory Institute of Reproductive Medicine of the University Munster Germany

Semen analysis as an integral part of infertility investigations has a surprisingly long history, emerging only slowly, from under a cloud of disrepute and occupying a solitary niche outside conventional pathology tests, until relatively recently. From origins in the 19th century when spermatozoa were only identified as present or absent in cervical mucus samples from postcoital tests, even then a practice deemed ＂... dabbling incompatible with decency and self-respect...＂（cited in [1]）.

关键词： no english key word

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Hereditary pancreatitis:An updated review in pediatrics

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World j.urnal of Clinical Pediatrics 2022年第1期11卷 27-37页

作者： Arvind Vasant Panchoo Grant H VanNess Edgardo Rivera-Rivera trevor j.Laborda Division of Gastroenterology Hepatology and NutritionThe Children’s Hospital of San AntonioSan AntonioTX 78207United States Department of Pediatrics Baylor College of MedicineHoustonTX 77030United States Faculty of Medicine Indiana University School of MedicineIndianapolisIN 46202United States Department of Pediatric Gastroenterology Parkview HealthFort WayneIN 46845United States

Hereditary Pancreatitis(HP)has emerged as a significant cause of acute,acute recurrent and chronic pancreatitis in the pediatric *** that it presents similarly to other causes of pancreatitis,a positive family history and/or isolation of a gene mutation are vital in its *** patterns remain complex,but mutations involving the PRSS1,SPINK1,CFTR and CTRC genes are commonly *** being first described in 1952,dozens of genetic alterations that modify the action of pancreatic enzymes have been *** children,these variants have been isolated in more than 50%of patients with chronic *** research has noted that such mutations in PRSS1,SPINK1 and CFTR genes are also associated with a faster progression from acute pancreatitis to chronic *** with HP are at increased risk of developing diabetes mellitus,exocrine pancreatic insufficiency,and pancreatic *** follows a multi-disciplinary approach with avoidance of triggers,surveillance of associated conditions,treatment of pancreatic insufficiency and use of endoscopic and surgical interventions for *** significant sequela,morbidity and a progressive nature,a thorough understanding of the etiology,pathophysiologic mechanisms,diagnostic evaluation,current management strategies and future research considerations for this evolving disease entity in pediatrics is warranted.

关键词： Hereditary pancreatitis Acute pancreatitis Acute recurrent pancreatitis Chronic pancreatitis Pancreatitis Pediatrics

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Optical wavelength meter with machine learning enhanced precision

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Photonics Research 2023年第3期11卷 420-430页

作者： GAZI MAHAMUD HASAN MEHEDI HASAN PENG LIU MOHAMMAD RAD ERIC BERNIER trevor j.MES HALL Photonic Technology Laboratory Advanced Research ComplexUniversity of OttawaK1N 6N5 OntarioCanada Huawei Technologies Canada KanataK2K 3J1 OntarioCanada

A photonic implementation of a wavelength meter typically applies an interferometer to measure the frequencydependent phase shift provided by an optical delay *** work shows that the information to be retrieved is encoded by a vector restricted to a circular cone within a 3D Cartesian obj.ct *** measured data belong to the image of the obj.ct space under a linear orthogonal *** impairments result in broken orthogonal symmetry,but the mapping remains *** circular cone is retained as the obj.ct space,which suggests that the conventional conic section fitting for the wavelength meter application is a premature reduction of the obj.ct space from R^(3)to R^(2).The inverse map,constructed by a learning algorithm,compensates impairments such as source intensity fluctuation and errors in delay time,coupler transmission,and photoreceiver sensitivity while being robust to *** simple algorithm does not require initial estimates for all parameters except for a broad bracket of the delay;further,weak nonlinearity introduced by uncertain delay can be corrected by a robust golden search *** phase-retrieval process is invariant to source power and its *** demonstrate that,to the extent that the ten parameters of the interferometer model capture all significant impairments,a precision limited only by the level of random noise is *** to measured data collected from a fabricated Si_(3)N_(4)wavelength meter,greater than an order of magnitude improvement in precision compared with the conventional method is achieved.

关键词： delay circular invariant

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Falling sperm counts and global estrogenic pollution： what have we learned over 20 years？

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Asian j.urnal of Andrology 2013年第2期15卷 159-161页

作者： David j.Handelsman trevor G Cooper ANZAC Research Institute Concord Hospital & University of Sydney Sydney New South Wales 2139 Australia Tuen Mun NT Hong Kong SAR PR ChinaGuest Editors for this special issue: Prof. DJ Handelsman

If scandal is the engine of progress in politics, and sensation is that of the media, while anti-modern panic is that of environmentalism, what is the dynamic of medical science？ Certainly discovery and invention represent the admirable high road, whereas competition and controversy represent the quotidian low road. This Special Issue is directed to reviewing the lessons learned from the most public, fervent and durable controversy in the short history of Andrology, the claims of world-wide falling sperm counts, due to global pollution by industrial estrogenic chemicals, published two decades ago.

关键词： EXTERNAL QUALITY-CONTROL SEMEN ANALYSIS REFERENCE RANGE IN-UTERO BIAS MEN ASSOCIATION GUIDELINES FERTILITY

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Falling sperm counts and global oestrogenic pollution：postscript

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Asian j.urnal of Andrology 2013年第2期15卷 208-211页

作者： trevor G Cooper David j.Handelsman Tuen Mun NT Hong Kong SAR PR China ANZAC Research Institute Concord Hospital & University of Sydney Sydney New South Wales 2139 Australia

This Special Issue provides reflections after 20 years, summarized in 12 papers, on the controversial issue of alleged decline in human sperm output due to global oestrogen pollution by industrial chemicals.

关键词： SEMEN

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Mantle-derived magmas:intraplate,hot-spots and mid-ocean ridges

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Science Bulletin 2015年第22期60卷 1873-1900页

作者： David H.Green trevor j.Falloon Earth Sciences School of Physical Sciences University of Tasmania

Primary or parental magmas act as probes to infer eruption and source temperatures for both mid-ocean ridge(MOR) and ‘hot-spot' magmas(tholeiitic picrites).The experimental petrogenetic constraints(‘inverse'experiments) argue for no significant temperature differences between them. However, there are differences in maj.r, minor and trace elements which characterise geochemical, not thermal, anomalies beneath ‘hot-spots'. We suggest that diapiric upwelling from interfaces(redox contrasts) between old subducted slab and normal MOR basalt source mantle is the maj.r reason for the observed characteristics of island chain or ‘hot-spot' *** basalts also include widely distributed volcanic centres containing lherzolite xenoliths, i.e. mantle-derived magmas. Inverse experiments on olivine basalt, alkali olivine basalt, olivine basanite, olivine nephelinite, olivine melilitite and olivine leucitite(lamproite) determined liquidus phases as a function of pressure, initially under anhydrous and CO2-absent conditions. Under C- and H-absent conditions, only tholeiites to alkali olivine basalts had Ol ? Opx ± Cpx as high-pressure liquidus *** of H2 O accessed olivine basanites at 2.5–3 GPa,*1,200 °C, but both CO2 and H2O were necessary to obtain saturation with Ol, Opx, Cpx and Ga at 2.5–3.5 GPa for olivine nephelinite and olivine melilitite. The forward and inverse experimental studies are combined to formulate a petrogenetic grid for intraplate, ‘hot-spot' and MOR magmatism within the plate tectonics paradigm. The asthenosphere is geochemically zoned by slow upward migration of incipient melt. The solidus and phasestabilities of lherzolite with very small water contents(\3,000 ppm) determine the thin plate behaviour of the oceanic lithosphere and thus the Earth's convection in the form of plate tectonics. There is no evidence from the parental magmas of MOR and ‘hot-spots' to support the‘deep mantle thermal plume' hypothesis. The preferred alternativ

关键词：幔源岩浆大洋中脊板内地球化学分区拉斑玄武岩橄榄岩包体橄榄玄武岩地幔热柱

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