Why agronomy in the developing world has become contentious     

James Sumberg  John Thompson  Philip Woodhouse 《Agriculture and Human Values》2013,30(1):71-83

In this paper we argue that over the last 40 years the context of agronomic research in the developing world has changed significantly. Three main changes are identified: the neoliberal turn in economic and social policy and the rise to prominence of the participation and environmental agendas. These changes have opened up new spaces for contestation around the goals, priorities, methods, results and recommendations of agronomic research. We suggest that this dynamic of contestation is having important effects on how agronomic research is planned, managed, implemented, evaluated and used, and is therefore worthy of detailed study. This is particularly so at a time when food security, rising food prices and the potential impacts of climate change on agriculture are in the policy spotlight. We outline a research agenda that should help illuminate the drivers, dynamics and impacts of this new ‘political agronomy’.  相似文献   

miRNA and piRNA expression profiles of breeder cock testes detected by next‐generation sequencing          下载免费PDF全文

SR Wu  W Guo  YL Li  XC Ren  XY Lei  XY Li  JH Yao  XJ Yang 《Reproduction in domestic animals》2017,52(2):203-213

miRNAs are small non‐coding regulatory RNAs that play key roles in diverse biological processes. In this study, we used the Solexa sequencing technique to profile miRNAs in breeder cock testes to illustrate their functions. A total of 663 co‐expressed miRNAs and 3,180 co‐expressed piRNAs were detected in three libraries. Based on Mir‐X^? miRNA qRT‐PCR, three miRNAs representing low, medium and high expression levels according to the sequencing results were selected randomly to validate the miRNAs' expression profiles. Results suggested that the miRNA expression profiles data could represent actual miRNA expression levels. Moreover, target genes prediction of the co‐expressed miRNAs and further Gene Ontology and Kyoto Encyclopedia of Genes and Genomes analyses were performed, which revealed that some candidate miRNAs were involved in the regulation of the spermatogenesis process, spermatozoa function and testicular metabolism. In conclusion, we provided a useful resource for further elucidation of the miRNAs' regulatory role in spermatogenesis, contributing to a preliminary database for functional and molecular mechanistic studies in testicular metabolism, spermatogenesis and other testes functions.  相似文献   

Demographic and preliminary employment data of the first two graduate cohorts from a rural veterinary school          下载免费PDF全文

JH Hyams  SL Raidal  LM Hayes  J Heller 《Australian veterinary journal》2017,95(4):91-100

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兽药产品区域市场营销策略     

周进辉 《中国兽药杂志》2007,41(6):48-50

传统的营销模式已经不能满足企业发展的需求，建立新的兽药产品区域市场营销体系是兽药企业的选择。  相似文献   

Seismic observations of splitting of the mid-transition zone discontinuity in Earth's mantle     

Deuss A  Woodhouse J 《Science (New York, N.Y.)》2001,294(5541):354-357

The transition zone of Earth's mantle is delineated by globally observed discontinuities in seismic properties at depths of about 410 and 660 kilometers. Here, we investigate the detailed structure between 410 and 660 kilometers depth, by making use of regional stacks of precursors to the SS phase. The previously observed discontinuity at about 520 kilometers depth is confirmed in many regions, but is found to be absent in others. There are a number of regions in which we find two discontinuities at about 500 and 560 kilometers depth, an effect which can be interpreted as a "splitting" of the 520 kilometer discontinuity. These observations provide seismic constraints on the sharpness and observability of mineralogical phase transitions in the mantle transition zone.  相似文献   

箱型矮栏养猪好     

Frer.  JH 《国外畜牧学(猪与禽)》1989,(1):52-53

自1960年来,已建造了数千幢部分或全部漏缝地板的肥育猪舍,但每头肥育猪的空间有限,通常为O.54~O.64平方米.在西欧进行的比较试验证明,当采用部分漏缝地板,且每头猪有o.70平方米空间时,技术效益较好.而如果猪能在箱型矮栏里休息,效果就更佳好动的肥育猪一般不怕贼风或低温的影响.试验表明,把饲喂和排粪区与躺卧区分开,是很有利的.躺卧区三面能够关闭,并可用顶盖覆盖,以创造  相似文献   

Web-based, interactive simulation of an anesthesia machine     

S  Lampotang  EB Liem  D Lizdas  S Cantwell  JH Modell 《Veterinary anaesthesia and analgesia》2003,30(2):118-119

Gases are transparent and the piping layout in anesthesia machines is not obvious, making it hard to understand anesthesia machine function, potential failure modes, and recovery from faults. We experimented with an approach that simplified the layout of the anesthesia machine piping by removing extraneous details and making gases not only visible, but also color-coded. More than 15 anesthesia machine controls were represented by icons that a user can adjust by clicking on the icon with a pointing device and subsequently observing the effect of his/her intervention on anesthesia machine function in real time. We simulated two anesthesia machine failures and also supported non-English languages and non-US gas color codes. Further, we initiated an experiment in Web philanthropy by deliberately choosing to make the educational module accessible without charge and selected the Web as the preferred medium for dissemination of the Virtual Anesthesia Machine (VAM) viewable at http://www.anest.ufl.edu/vam . Originally designed for use in human anesthesiology, a significant percentage (about 30%) of the 54 000 international visitors, as tracked by an independent third-party Web traffic monitoring service, for the period 9/00–5/02, were from the veterinary field. VAM is being used as part of the curriculum in veterinary programs in the US and overseas and has been well received by the global anesthesia community (human and veterinary).  相似文献   

An outbreak of mucormycosis in slender tree frogs (Litoria adelensis) and white-lipped tree frogs (Litoria infrafrenata)     

JH CREEPER  DC MAIN  L. BERGER  S. HUNTRESS  W. BOARDMAN 《Australian veterinary journal》1998,76(11):761-762

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CD4+ and CD8+ T- lymphocytopenia in a filly with Pneumocystis carinii pneumonia     

MJBF FLAMINIO  BR RUSH  JH COX  WE MOORE 《Australian veterinary journal》1998,76(6):399-402

Decreased proportion of CD4+ and CD8+ T lymphocytes in peripheral blood likely contributed to susceptibility to Pneumocystis carinii in a foal. Cytological evaluation of bronchoalveolar lavage was required for identification of the pathogen and serial flow-cytometric analysis of peripheral blood lymphocytes documented transient low expression of CD4+ and CD8+ T lymphocytes. Although immunodeficiency is uncommon, it must be included in the differential diagnosis for patients suffering from chronic or opportunistic infections and may provide an indication for immunostimulant therapy.  相似文献   

Effects of Exogenous Insulin on Luteolysis and Reproductive Cyclicity in the Mare     

BPB Rambags  AW van Rossem  EE Blok  E de Graaf-Roelfsema  H Kindahl  JH van der Kolk  TAE Stout 《Reproduction in domestic animals》2008,43(4):422-428

Insulin is a pancreatic hormone that classically regulates carbohydrate and fat metabolism, but also appears to play a role in various reproductive processes. A preliminary study suggested insulin production by day 10 to 18 equine conceptuses. The aim of the present study was to examine the hypothesis that insulin is the conceptus signal responsible for maternal recognition of pregnancy (MRP) in the mare, or otherwise influences reproductive cyclicity during the MRP period. Six Warmblood mares were treated daily during days 7 to 17 after ovulation of two successive oestrous cycles with either (short and intermediate acting) insulin or control saline. Mares were assigned randomly to treatment, and crossed over during the subsequent cycle. Time of ovulation and corpus luteum surface area were determined by serial transrectal ultrasonographic examination of the mares' ovaries, and daily jugular vein blood samples were analysed for progesterone and luteinizing hormone (LH) concentrations. On day 14 of dioestrus, the luteolytic drive was examined by measuring systemic 15-ketodihydroprostaglandin F_{2 α} (PG-metabolite) release in response to oxytocin challenge. In addition, yolk sac fluid recovered from 32 day 10 to 14 equine conceptuses was analysed for insulin concentrations. Insulin administration did not affect luteal size, dioestrus length, the interovulatory interval, or circulating LH concentrations. Insulin administration also failed to suppress oxytocin-induced PGF_{2 α} release, and tended to depress systemic progesterone concentrations. Finally, insulin could not be detected in the yolk sac fluid of day 10 to 14 equine conceptuses by radio-immunoassay. It is concluded that insulin administered daily during days 7 to 17 of dioestrus has little or no effect on reproductive cyclicity in the mare, and is unlikely to be the MRP signal.  相似文献