Glyphosate and glufosinate-based herbicides: fate in soil,transfer to,and effects on land snails     

Coline Druart  Maurice Millet  Renaud Scheifler  Olivier Delhomme  Annette de Vaufleury 《Journal of Soils and Sediments》2011,11(8):1373-1384

Purpose  

The aim of this work was to assess the transfer and effects of two widely used herbicides on the land snail Helix aspersa during long-term exposure under laboratory conditions.  相似文献   

Effects of dobutamine on cardiovascular function and oxygen delivery in standing horses     

Merit Meier  Regula Bettschart-Wolfensberger  Colin Claudio Schwarzwald  Karine Portier  Annette Gysler  Simone Katja Ringer 《Journal of veterinary pharmacology and therapeutics》2020,43(5):470-476

Dobutamine is routinely used to improve cardiovascular function in anaesthetized horses. However, dobutamine in conscious horses is insufficiently investigated. Ten research horses that were already instrumented for a preceding trial were included into the study. Cardiovascular variables were recorded and blood samples taken after instrumentation (Baseline), before starting dobutamine and after 10 min of dobutamine infusion (2 µg kg⁻¹ min⁻¹). A significant increase in systemic blood pressure, mean pulmonary artery pressure and right atrial pressure, and a decrease in heart rate were observed with dobutamine compared with baseline measurements. Arterial and mixed venous haemoglobin and oxygen content, as well as mixed venous partial pressure of oxygen increased. No significant changes in cardiac output, stroke volume, systemic vascular resistance, arterial partial pressure of oxygen, or oxygen consumption, delivery and extraction ratio were detected. Concluding, dobutamine increased systemic blood pressure without detectable changes in stroke volume, cardiac output or systemic vascular resistance in conscious horses.  相似文献   

Normal regression of the internal umbilical remnant structures in Standardbred foals     

Annette M. McCoy  Christine T. Lopp  Sarah Kooy  Alessandro C. Migliorisi  Scott M. Austin  Pamela A. Wilkins 《Equine veterinary journal》2020,52(6):876-883

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A multicenter randomized controlled trial of medium-chain triglyceride dietary supplementation on epilepsy in dogs     

Benjamin A. Berk  Tsz H. Law  Rowena M. A. Packer  Annette Wessmann  Andrea Bathen-Nöthen  Tarja S. Jokinen  Anna Knebel  Andrea Tipold  Ludovic Pelligand  Zoe Meads  Holger A. Volk 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2020,34(3):1248-1259

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Effects of nitrogen fertilization and irrigation on N2O emissions from a sandy soil in Germany     

Benjamin Trost  Annette Prochnow  Michael Baumecker  Andreas Meyer-Aurich  Katrin Drastig  Frank Ellmer 《Archives of Agronomy and Soil Science》2013,59(5):569-580

The aim of this study was to investigate the effect of supplemental irrigation on the amount of N₂O emissions on a sandy soil in north-east Germany. N₂O flux measurements were carried out over two vegetation periods from the emergence of plants to harvest. The level of N₂O emissions was low, which is typical for sandy soils in north-east Germany. In both periods, irrigation had no increasing effect on N₂O emissions. Relevant factors were the soil temperature and the soil water-filled pore space (WFPS), which were mainly influenced by weather conditions. This may indicate that nitrification was the main source of N₂O emissions. In conclusion, this study has confirmed that sandy soils under weather conditions of north-east Germany generally have a very low potential for N₂O emissions.  相似文献   

Factors that affect the demand for potato products in the United States     

Joseph F. Guenthner  Annette E. Levi  Biing-Hwan Lin 《American Journal of Potato Research》1991,68(9):569-579

A demand model was developed to determine the factors that affect the demand for potato products in the United States. The following market components were analyzed: potato chips; dehydrated-foodservice; dehydrated-retail; fresh; frozen-foodservice; and frozen-retail. Equations were estimated for each of the six components via ordinary least squares. Factors found to affect demand were population, consumer price index, consumer income, consumer debt, retail potato product price, females in the labor force, percentage of households with microwave ovens, restaurant meal expenditures, price of substitute potato products, price of complement products, and advertising expenditures. The demand for all of the potato products was found to be inelastic, but fresh demand was the most inelastic.  相似文献   

Assessing nitrogen fixation in mixed- and single-species plantations of Eucalyptus globulus and Acacia mearnsii     

Forrester DI  Schortemeyer M  Stock WD  Bauhus J  Khanna PK  Cowie AL 《Tree physiology》2007,27(9):1319-1328

Mixtures of Eucalyptus globulus Labill. and Acacia mearnsii de Wildeman are twice as productive as E. globulus monocultures growing on the same site in East Gippsland, Victoria, Australia, possibly because of increased nitrogen (N) availability owing to N(2) fixation by A. mearnsii. To investigate whether N(2) fixation by A. mearnsii could account for the mixed-species growth responses, we assessed N(2) fixation by the accretion method and the (15)N natural abundance method. Nitrogen gained by E. globulus and A. mearnsii mixtures and monocultures was calculated by the accretion method with plant and soil samples collected 10 years after plantation establishment. Nitrogen in biomass and soil confirmed that A. mearnsii influenced N dynamics. Assuming that the differences in soil, forest floor litter and biomass N of plots containing A. mearnsii compared with E. globulus monocultures were due to N(2) fixation, the 10-year annual mean rates of N(2) fixation were 38 and 86 kg ha(-1) year(-1) in 1:1 mixtures and A. mearnsii monocultures, respectively. Nitrogen fixation by A. mearnsii could not be quantified on the basis of the natural abundance of (15)N because such factors as mycorrhization type and fractionation of N isotopes during N cycling within the plant confounded the effect of the N source on the N isotopic signature of plants. This study shows that A. mearnsii fixed significant quantities of N(2) when mixed with E. globulus. A decline in delta(15)N values of E. globulus and A. mearnsii with time, from 2 to 10 years, is further evidence that N(2) was fixed and cycled through the stands. The increased aboveground biomass production of E. globulus trees in mixtures when compared with monocultures can be attributed to increases in N availability.  相似文献   

Activation of the Renin-Angiotensin System in Dogs With Asymptomatic and Mildly Symptomatic Mitral Valvular Insufficiency   总被引：1，自引：0，他引：1  

Henrik D. Pedersen  Jørgen Koch  Knud Poulsen  Asger L. Jensen  Annette Flagstad 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1995,9(5):328-331

The renin-angiotensin system has important pathophysiologic implications in the development of congestive heart failure. The activity of the renin-angiotensin system early in the course of heart disease and heart failure in dogs was evaluated by measuring the plasma renin activity (PRA) and plasma aldosterone concentration (PAC) in 18 Cavalier King Charles Spaniels with asymptomatic or mildly symptomatic mitral valvular insufficiency, and in 18 healthy Cavalier King Charles Spaniels. All dogs were unmedicated and had no other diseases. The PRA was high in the dogs with mitral valvular insufficiency (median 3.44 ng/mL/h, interquartile interval 2.59 to 8.66 ng/mL/h) compared with the controls (median 2.51 ng/mL/h, interquartile interval 1.44 to 3.58 ng/mL/h). The PAC was also higher in the dogs with mitral insufficiency (median 53 pg/mL, interquartile interval 33 to 138 pg/mL) than in the control group (median 27 pg/mL, interquartile interval 11.5 to 54 pg/mL). However, there was considerable overlap between the 2 groups in both PRA and PAC. It was concluded from these data that there is early activation of the renin-angiotensin system in some Cavalier King Charles Spaniels with mitral valvular insufficiency. Further prospective studies are needed to determine if early intervention with angiotensin-converting enzyme inhibitors will be valuable in this group of patients.  相似文献   

EFFECT OF SODIUM DIATRIZOATE ON THE IN VITRO GROWTH OF THREE COMMON CANINE URINARY BACTERIAL SPECIES     

Annette L.  Ruby  BA  Gerald V.  Ling  DVM  Norman  Ackerman  DVM 《Veterinary radiology & ultrasound》1983,24(5):222-225

The mean concentration of diatrizoate in urine specimens of eight dogs collected 20 minutes after intravenous injection of 2.2 ml/kg of sodium and meglumine diatrizoate (iodine concentration, 288 mg/ml) was 80 mg/ml (iodine concentration, 48 mg/ml). The mean concentration plus 1 SD was 111 mg/ml (iodine concentration, 66 mg/ml), and the mean concentration plus 2 SD was 142 mg/ml (iodine concentration, 85 mg/ml). The presence of diatrizoate at a concentration of 142 mg/ml did not inhibit in vitro bacterial growth of any of ten randomly selected canine urinary isolates of Escherichia coli or any of ten randomly selected urinary isolates of Staphylococcus aureus. In vitro bacterial growth of all ten randomly selected urinary bacterial isolates of Proteus mirabilis was significantly inhibited by a diatrizoate concentration of 80 mg/ml. Bacterial growth was progressively inhibited by increased diatrizoate concentrations.  相似文献   

Evaluation of the non‐calibrated pulse contour cardiac output monitor FloTrac/Vigileo against thermodilution in standing horses          下载免费PDF全文

Annette PN Kutter  Regula Bettschart‐Wolfensberger  Colin C Schwarzwald  Karine G Portier  Simone K Ringer 《Veterinary anaesthesia and analgesia》2016,43(2):153-162

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