Spontaneous hemoperitoneum and anaphylactic shock associated with Hymenoptera envenomation in a dog          下载免费PDF全文

Dana J. Caldwell DVM  Kaelyn E. Petras DVM  Brandi L. Mattison DVM  DACVECC  Raegan J. Wells DVM  MS  DACVECC  Victoria L. Heffelman DVM  DACVR 《Journal of Veterinary Emergency and Critical Care》2018,28(5):476-482

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Characterization of Open-Pollinated Maize Varieties from Rio Grande do Sul State     

Barros  Lílian Moreira  Prochnow  Daiane  de Oliveira  Victoria Freitas  da Silva  Airton Rosa  de Oliveira  Antonio Costa  da Maia  Luciano Carlos 《Journal of Crop Science and Biotechnology》2019,22(1):31-36

Journal of Crop Science and Biotechnology - The morphological characterization allows one to estimate and evaluate the genetic distance among different varieties, identifying heterotrophic groups...  相似文献   

Absorption,translocation and metabolism of aminocyclopyrachlor in young plants of Ipomoea purpurea and Ipomoea triloba     

A F M Silva  G S Silva  K F Mendes  A L Giraldeli  V L Tornisielo  R Victoria Filho 《Weed Research》2019,59(1):58-66

Members of the Convolvulaceae family are known to be sensitive to aminocyclopyrachlor, although little is known about the absorption, translocation and metabolism of the herbicide in these species of weed. The aim of this study was to evaluate the absorption, translocation and metabolism of ¹⁴C‐aminocyclopyrachlor in young plants of Ipomoea purpurea and Ipomoea triloba. Assessments were performed at 3, 6, 12, 24, 48 and 72 h after treatment (HAT) for the study of absorption and translocation. Metabolism was assessed at three time points (3, 24 and 72 HAT). In terms of absorption, was observed a difference between species at the 3 and 48 HAT time points, where I. purpurea had a higher absorption of ¹⁴C‐aminocyclopyrachlor. No differences were observed between species at any other time points. Of the total absorbed herbicide, 90.9% for I. purpurea and 91.8% for I. triloba were detected on the treated leaf. I. purpurea presented higher translocation to the leaf above the treated leaf, while I. triloba showed higher translocation to the lower leaves and roots. No increase in absorption of ¹⁴C‐aminocyclopyrachlor was observed above 24 HAT for I. purpurea and above 6 HAT for I. triloba, and translocation was low (<1%) for both species in all plant parts. This suggests that post‐emergence application of aminocyclopyrachlor cannot be effective for the control of I. purpurea and I. triloba and alternative approaches are required. Nevertheless, no ¹⁴C‐aminocyclopyrachlor metabolites were observed in the studied plants, which indicated sensitivity in I. purpurea and I. triloba to the herbicide.  相似文献   

Predicting the distribution of harmful species and their natural enemies in agricultural,livestock and forestry systems: an overview   总被引：1，自引：0，他引：1  

M. Victoria Lantschner  Gerardo de la Vega  Juan C. Corley 《国际虫害防治杂志》2019,65(3):190-206

Abstract

Predicting the potential distribution of harmful species to agriculture, livestock and forestry is decisive to prevent their impacts, especially when these are expanding their range due to global change. Recent advances in species distribution modelling (SDM) have made these tools widely used for biosecurity studies. We reviewed the available literature of SDM for pest, weeds, pathogen species and biological-control agents, with the aims of synthesizing and quantifying the available information, and identifying gaps in the knowledge and future perspectives. SDMs for 420 species were collected from 220 publications. Insect pests were the most frequently studied organisms. CLIMEX and MaxEnt were the most commonly used modelling tools, while pure mechanistic approaches were rarely applied. Most studies covered broad scales, and focused on predicting the distribution of invasive species and/or the effects of climate change. The challenge remains for models to include disturbance, resource availability, and biotic factors, as well as to better quantify uncertainty. This future directions will be fundamental to improve the predictive power of SDMs for productive systems in the context of a rapidly changing World.  相似文献   

The Effect of Vitamins on Weight Gain and Organ Production in the Sea Urchin,Lytechinus variegatus (Echinodermata: Echinoidea)     

Warren T. Jones  Hugh S. Hammer  Mickie L. Powell  Victoria K. Gibbs  John M. Lawrence  Addison L. Lawrence  Stephen A. Watts 《Journal of the World Aquaculture Society》2012,43(1):39-50

We investigated the requirements for a commercial vitamin premix in diets of Lytechinus variegatus. Small L. variegatus (ca. 28 mm diameter) were collected from Saint Joseph Bay, Florida, and acclimated to laboratory conditions (32 ppt salinity, 22 C, 12:12 photoperiod) for 3 wk, then placed individually into plastic mesh cages (n = 16 per treatment). Sixteen urchins were dissected to obtain initial weights of organs (gut, gonad, test). Each treatment was fed one of five semipurified diets supplemented with levels of a commercial shrimp vitamin premix ranging from 0 to 0.9% dry weight. At 4‐wk intervals, wet weights and test diameters were measured. At 16 wk, urchins were dissected and organs weighed. Significant weight gain and 100% survival was observed with all diets. At 16 wk, urchins fed 0% vitamin premix exhibited no noticeable pathology but had significantly less weight gain than those fed the 0.6% vitamin premix. Those fed the 0.6% vitamin premix had significantly greater weight gain than all other diets (P < 0.0001). Gonad weights increased in all treatments, but did not vary significantly. Under the conditions of this study, L. variegatusexhibited a satisfactory nutritional response. Experiments are planned to determine specific dietary vitamin requirements for L. variegatus.  相似文献   

Impact of COVID-19 on student attainment and pedagogical needs when undertaking independent scientific research     

Jennie N. Jeyapalan  Victoria. James  David S. Gardner  Jennifer H. Lothion-Roy  Nigel P. Mongan  Catrin Sian Rutland 《Anatomia, histologia, embryologia》2023,52(1):93-100

Research is often an essential component of completing a veterinary medicine degree, with universities worldwide aiming to teach students a variety of techniques and general research comprehension and skills. As universities worldwide navigated the COVID-19 pandemic, it was often necessary to move towards distance learning, this was employed for the research module at The University of Nottingham, School of Veterinary Medicine and Science. Following completion of their independent research project, each student cohort was sent a student evaluation of the module questionnaire and quantitative and qualitative analysis was undertaken. In addition, assessment outcomes based on dissertation grade, supervisor grade and overall module score were analysed quantitatively. This was conducted on both the individual cohorts and between the pre- and peri-pandemic groups, ranging from 2017–2018 through to 2021–2022 cohorts. The students received increased dissertation and supervisor grades (by nearly 6%) during the 2021–2022 peri-pandemic cohort, when compared to the pre-pandemic cohorts, but did differ significantly compared to the 2020–2021 cohort. The pre- and peri-pandemic Likert-scale ratings for module organisation and assessment criteria were similar, workload management and the ability to explore concepts and ideas was reduced in the peri-pandemic cohorts, whereas the accessibility to resources was increased in the peri-pandemic students compared to those taught prior to the pandemic. Student feedback can provide essential information when designing and managing research projects and when compared to assessment grades it can help us understand attainment, essential information when providing a quality university level education whilst supporting student welfare following the COVID-19 pandemic.  相似文献   

Equine influenza bi-annual boosters: What does the evidence tell us?     

Victoria A. Colgate  J. Richard Newton 《Equine veterinary journal》2023,55(1):147-152

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Studies on biological control of Pigeonpea Pod Borers in India     

Dr. G. Santharam  D. Rose Victoria  R. J. Rabindra  S. Jayaraj 《Journal of pest science》1994,67(5):103-106

Results of two field experiments, one on SA 1 pigeonpea in rainfed and the other on Co.5 pigeonpea in irrigated conditions revealed thatBacillus thuringiensis var.kurstaki (B.t.k.) (Delfin), its combinations with nuclear polyhedrosis virus ofHeliothis armigera andChrysoperla carnea were as effective as endosulfan in reducing the pod borers,Heliothis armigera andExelastis atomosa. However,B.t.k. 1.25 kg+endosulfan 175 g/ha orB.t.k. 2.5 kg+HaNPV, 250 LE/ha gave better control of damage to flowers and pods thanB.t.k. applied alone on SA 1 pigeonpea. The yield differences between these treatments were not significant. A combination of HaNPV 250 LE/ha+endosulfan 175 g/ha was superior toB.t.k. Similar trend was seen on Co.5 pigeonpea. Release ofC. carnea second instar larvae 1 lakh/ha was not effective in increasing the yield of pigeonpea.  相似文献   

Evidence that subsistence farmers have domesticated indigenous fruits (Dacryodes edulis and Irvingia gabonensis) in Cameroon and Nigeria     

Roger R.B. Leakey  Zacharie Tchoundjeu  Rognvald I. Smith  Robert C. Munro  Jean-Marie Fondoun  Joseph Kengue  Paul O. Anegbeh  Alain R. Atangana  Annabelle N. Waruhiu  Ebenezer Asaah  Cecilia Usoro  Victoria Ukafor 《Agroforestry Systems》2004,60(2):101-111

Ten fruit and kernel traits were measured in 152 Irvingia gabonensis and 293 Dacryodes edulis trees from 6 villages in Cameroon and Nigeria. Frequency distribution curves were used to examine the range of variation of each trait of each species in each village and aggregated into national and regional populations. There were differences between the village sub-populations, with regard to the normality (e.g., mean kernel mass of D. edulis) or skewness (e.g., mean flesh depth of D. edulis) of the distribution curves and in the degree of separation between the individual village populations along the x axis, resulting in the development of a bimodal distribution in the regional population. For all traits, populations of both species differed significantly between countries, but only in D. edulis were there significant differences between the Cameroon populations. On the basis of the results of this study, D. edulis can be said to be virtually wild in Nigeria but semi-domesticated in Cameroon, while I. gabonensis is wild in Cameroon and semi-domesticated in Nigeria. These results are discussed with regard to a hypothesis that the range and frequency of variation in the different populations can be used to identify five stages of domestication. From a comparison of the frequency distribution curves of desirable versus undesirable traits, and statistically identifyable changes in skewness and kurtosis, it is concluded that as a result of the farmers’ own efforts by truncated selection, D. edulis is between Stages 2 and 3 of domestication (with a 67% relative gain in flesh depth) in Cameroon, while I. gabonensis in Nigeria is at Stage 2 (with a 44% relative gain in flesh depth). In this study, genetic diversity seems to have been increased, and not reduced, by domestication. This revised version was published online in June 2006 with corrections to the Cover Date.  相似文献   

烟中都有些什么?——木材工业中的放射性空气污染的研究(英文)     

Dilian He Nicholson 《林业研究》2003,(2)

建造一座木材工业生产厂是需要达到一系列的国家立法要求。而达到这些要求是通过严格的科学研究和调查而得来的。在一个项目中,通常这是一个关键环节。大多高度工业化国家都具有严格的法律条例控制放射性粉尘和气体对环境所造成的污染。本文讨论的是在木材工业干燥过程的内部,什么是造成环境污染的环节因素,以化工生产条件所带来的影响为例,输入原材料的选择,干燥炉的设计,运作程序,以及燃料的选择。上述因素将会对烟囱污染带来什么样的影 响?本文采用国际通用的分析手法,准确地分析了放射性粉尘积累以及如何控制由此造成的空气污染。根据研究调查的积累进一步探讨如何以最佳的设计系统而达到控制污染。以冷凝缩代替热干燥将是一个新的值得考虑的工业化革新。参14。  相似文献