Salmon oil supplementation in dogs affects the blood flow of testicular arteries     

Marcelo Carvalho Santos  Chiara Milani  Paolo Zucchini  Celia Raquel Quirino  Stefano Romagnoli  Isabel Candia Nunes da Cunha 《Reproduction in domestic animals》2021,56(3):476-483

The administration of fish oils is known to cause changes in several reproductive parameters of domestic animals. The ingestion of polyunsaturated fatty acids (PUFAs) of the omega-3 family, such as docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), has been described and correlated with changes in the semen quality, testosterone levels and male fertility. Nevertheless, few studies monitored and registered effects after ceasing supplementation. In the present study, we monitored the Doppler velocimetric and ultrasonographic parameters of nine dogs' testis for 90 days (D90) checking the effect of salmon oil supplementation, and monitoring continued for 60 days more, after ceasing supplementation (D150). Ultrasonographic evaluations comprised determining the Doppler velocimetric parameters, testicular and epididymal volume, and testicular echotexture. Peak systolic velocity (PSV) as well as final diastolic velocity (EDV) in the supratesticular arteries (STA), and marginal artery (MA) increased during the period of treatment and kept that level up to D150. There was no difference between the fish-oil supplementation period and the unsupplemented one regarding the testicular and epididymal volume and echogenicity and heterogeneity characteristics. A negative correlation was found between heterogeneity of testis and sperm production (r = −.41, p = .008). Doppler velocimetry indices were affected by the supplementation, leading to an increase in testicular blood flow.  相似文献   

Effect of soil type on adsorption-desorption, mobility, and activity of the herbicide norflurazon     

Morillo E  Undabeytia T  Cabrera A  Villaverde J  Maqueda C 《Journal of agricultural and food chemistry》2004,52(4):884-890

Adsorption-desorption studies of norflurazon on 17 soils of very different characteristics have been performed using a batch equilibration method and correlated to its mobility, activity, and persistence in soils. The influence of different soil properties and components on norflurazon adsorption was determined. The significant variables were organic matter (OM) content and iron and aluminum oxides, which accounted for 85 and 11% of the variability, respectively. Norflurazon desorption from soils was hysteretic in all cases, being more irreversible at the lowest herbicide concentrations adsorbed. The percentage of norflurazon eluted from columns of selected soils reached almost 100% in soils with sand content >80% and OM <1%, but in the soil which gave the highest sorption, herbicide residues were not detected at depths >16 cm. The herbicidal activity of norflurazon was followed by measuring its bleaching effect on soybean plants, and the herbicide concentration required to give 50% chlorophyll inhibition (CI(50)) was calculated. CI(50) was achieved on a sandy soil with 0.08 mg x kg(-)(1), whereas 1.98 mg x kg(-)(1) was necessary for the soil that presented maximum norflurazon adsorption.  相似文献   

Evaluation of a cattle rapid test for early pregnancy diagnosis in sheep     

de Miranda e Silva Chaves  Camila  da Costa  Ricardo Lopes Dias  Duarte  Keila Maria Roncato  Beltrame  Renato Travassos  Quirino  Celia Raquel 《Tropical animal health and production》2020,52(3):1345-1349

Tropical Animal Health and Production - The early pregnancy diagnosis allows optimizing production and timely management correction, with a greater reproductive output of livestock. The Idexx Rapid...  相似文献   

Controlled release of the herbicide norflurazon into water from ethylcellulose formulations   总被引：4，自引：0，他引：4  

Sopeña F  Cabrera A  Maqueda C  Morillo E 《Journal of agricultural and food chemistry》2005,53(9):3540-3547

The herbicide norflurazon was encapsulated in ethylcellulose (EC(40)) microspheres by the solvent evaporation technique to obtain controlled release formulations. The kinetics of release of the active ingredient into the aqueous solution from different preparations was determined. It was found that the percentage release of the incorporated herbicide was a function of the composition and formation conditions of the formulations (amount of emulsifying agent, EC(40)/herbicide ratio, stirring speed, and percentage of pore-forming agent). The percentage of the herbicide release was related to the properties of the different microspheres obtained, such as particle size distribution, herbicide loading, or surface morphology. The release percentage depended inversely on the particle size of the microspheres and directly on the content of active ingredient and emulsifying and pore-forming agents. An empirical equation was used to fit the herbicide release data, indicating that the release of norflurazon from the various formulations is controlled by a diffusion mechanism. The time taken for 50% of the active ingredient to be released into water (T(50)) was calculated, showing a wide variation among the different preparations (0.95-16.4 days).  相似文献   

Structural characterization of Peruvian carrot (Arracacia xanthorrhiza) starch and the effect of annealing on its semicrystalline structure     

Rocha TS  Cunha VA  Jane JL  Franco CM 《Journal of agricultural and food chemistry》2011,59(8):4208-4216

Structural characteristics of native and annealed Peruvian carrot (Arracacia xanthorrhiza) starches were determined and compared to those of cassava and potato starches. Peruvian carrot starch presented round and irregular shaped granules, low amylose content and B-type X-ray pattern. Amylopectin of this starch contained a large proportion of long (DP > 37) and short (DP 6-12) branched chains. These last ones may contribute to its low gelatinization temperature. After annealing, the gelatinization temperatures of all starches increased, but the ΔH and the crystallinity increased only in Peruvian carrot and potato starches. The annealing process promoted a higher exposure of Peruvian carrot amylose molecules, which were more quickly attacked by enzymes, whereas amylopectin molecules became more resistant to hydrolysis. Peruvian carrot starch had structural characteristics that differed from those of cassava and potato starches. Annealing affected the semicrystalline structure of this starch, enhancing its crystallinity, mainly due to a better interaction between amylopectin chains.  相似文献   

Ethical animal research – a pathway to zero tolerance          下载免费PDF全文

Celia M. Marr 《Equine veterinary journal》2015,47(1):3-5

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Fundamentals of arrhythmogenic mechanisms and treatment strategies for equine atrial fibrillation     

Antoine Premont  Samantha Balthes  Celia M. Marr  Kamalan Jeevaratnam 《Equine veterinary journal》2022,54(2):262-282

Atrial fibrillation (AF) is the most common pathological arrhythmia in horses. Although it is not usually a life-threatening condition on its own, it can cause poor performance and make the horse unsafe to ride. It is a complex multifactorial disease influenced by both genetic and environmental factors including exercise training, comorbidities or ageing. The interactions between all these factors in horses are still not completely understood and the pathophysiology of AF remains poorly defined. Exciting progress has been recently made in equine cardiac electrophysiology in terms of diagnosis and documentation methods such as cardiac mapping, implantable electrocardiogram (ECG) recording devices or computer-based ECG analysis that will hopefully improve our understanding of this disease. The available pharmaceutical and electrophysiological treatments have good efficacy and lead to a good prognosis for AF, but recurrence is a frequent issue that veterinarians have to face. This review aims to summarise our current understanding of equine cardiac electrophysiology and pathophysiology of equine AF while providing an overview of the mechanism of action for currently available treatments for equine AF.  相似文献   

Influence of organic amendments on Fe,Cu, Mn,and Zn availability and clay minerals of different soils     

Celia Maqueda  Esmeralda Morillo  Rafael Lopez  Tomas Undabeytia  Francisco Cabrera 《Archives of Agronomy and Soil Science》2013,59(5):599-613

The effects of application of composted olive mill wastewater sludge (A) and depotassified sugarbeet vinasse (V) on total diethylenetriaminepentaacetic acid (DTPA) and sequential extracted micronutrients were investigated. The mineralogy of the fine fraction of soils was also studied. The soils used were a Typic Rhodoxeralf (soil R), a Typic Xeropsamment (soil S), and a Typic Xerorthent (soil C). Fertilization with A and V during 3 years, in general did not significantly affect the total concentration of Fe, Cu, Mn, and Zn versus the control. However, the elements extracted with DTPA generally increased with the organic amendments, more with A than with V. The BCR (European Community Bureau of Reference) sequential extraction indicated that the addition of organic matter generally increased Zn and Mn in the two more available fractions. A great amount of Fe was found in the second and third fractions from the unamended and amended soils. Nevertheless, the sum of the three fractions was enhanced for the organic amendment, except for calcareous soil. The distribution of these elements in the different fractions was significantly affected by the type of soil. The addition of both fertilizers caused modifications in particle size and consequence redistribution of the calcite content between the different fractions.  相似文献   

Export growth and diversification in Algeria: lessons from China' s foreign trade experience     

Celia Bouzekri 《山东饲料》2013,(8)

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Export growth and diversification in Algeria:lessons from China’s foreign trade experience     

Celia Bouzekri 《山东饲料》2013,(11):52-53

Algeria like many of its Middle Eastern and North African(MENA) counterparts,rely heavily on the industry of fossil fuels,such as gas and petroleum.This big reliance of Algerian economy on hydrocarbon exports revenue makes it very vulnerable to external shocks.So since the late 1990s different measures had been adopted to help promote the diversification of exports,but so far the adoption of these measures,has mixed results and has failed to boost foreign trade out of Hydrocarbons exports in a significant way.But unlike Algeria,China has been the most successful developing country in this modern era of globalization.It was one of the poorest countries in the world in 1980s,and since initiating economic reform after 1978 its GDP has expanded at a steady rate over 10% and it`s foreign trade is considered as one of the most important in the world.Given these facts the purpose of this paper is to analyze,why Algeria struggles to develop and diversify its exports out of Hydrocarbons.And what are the engines of the impressive growth of china’s foreign trade,if any;lessons can Algeria take from china’s foreign trade experience.  相似文献