Auswahl der wissenschaftlichen Literatur zum Thema „Normandy cattle“
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Zeitschriftenartikel zum Thema "Normandy cattle"
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Parent, André. „Félix Vicq d'Azyr: Anatomy, Medicine and Revolution“. Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques 34, Nr. 1 (Februar 2007): 30–37. http://dx.doi.org/10.1017/s0317167100018722.
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ABSTRACT:Félix Vicq d'Azyr was born in 1748 in the small town of Valognes, Normandy. He studied medicine in Paris but he was particularly impressed by the lectures given at the Jardin du Roi by the comparative anatomist Louis Daubenton and the surgeon Antoine Petit. In 1773, Vicq d'Azyr initiated a series of successful lectures on human and animal anatomy at the Paris Medical School, from which he received his medical degree in 1774. He was elected the same year at the Academy of Sciences at age 26, thanks to his outstanding contributions to comparative anatomy. Vicq d'Azyr became widely known after his successful management of a severe cattle plague that occurred in the southern part of France in 1774, an event that led to the foundation of the Royal Society of Medicine in 1778. As Permanent Secretary of this society, Vicq d'Azyr wrote several eulogies that were models of eloquence and erudition and worth him a seat at the French Academy in 1788. Vicq d'Azyr published in 1786 a remarkable anatomy and physiology treatise: a large in-folio that contained original descriptions illustrated by means of nature-sized, colored, human brain figures of a quality and exactitude never attained before. In 1789, Vicq d'Azyr was appointed physician to the Queen Marie-Antoinette and, in 1790, he presented to the Constituent Assembly a decisive plan to reform the teaching of medicine in France. Unfortunately, Vicq d'Azyr did not survive the turmoil of the French Revolution; he died at age 46 on June 20, 1794.
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Davison, H. C., A. Otter und A. J. Trees. „Significance of Neospora caninum in British dairy cattle determined by estimation of seroprevalence in normally calving cattle and aborting cattle“. International Journal for Parasitology 29, Nr. 8 (August 1999): 1189–94. http://dx.doi.org/10.1016/s0020-7519(99)00094-6.
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Kim, Min-Kyoung, und Raymond M. Leuthold. „The Distributional Behavior of Futures Price Spreads“. Journal of Agricultural and Applied Economics 32, Nr. 1 (April 2000): 73–87. http://dx.doi.org/10.1017/s1074070800027838.
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AbstractThe distributional behavior of futures price spreads is examined for four commodities: corn, live cattle, gold and T-bonds. Remarkably different results are found over commodities, time period, and sample size. Actual spread changes for the smaller sample size of gold and T-bonds and for corn produce more normal distributions for weekly than for daily differencing intervals, while all live cattle spreads for actual changes are normally distributed. However, the larger sample size of both gold and T-bonds and the relative spread changes for corn and live cattle do not become more normally distributed under temporal aggregation of the data.
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Sarmiento, Derly Rodríguez, Emanuela Tullo und Rita Rizzi. „Pedigree-based analysis of genetic variability in the registered Normande cattle breed in Colombia“. Animal Production Science 57, Nr. 3 (2017): 422. http://dx.doi.org/10.1071/an15057.
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Genetic variability and structure of the population were studied in 7949 registered Normande cattle in Colombia. The pedigree was deep with 18 traced generations, but there were some incomplete genealogical information for the cattle born in the more distant past. The average number of complete and equivalent complete generations was 2.42 and 5.21, respectively. The average pedigree completeness index for five generations was 0.62, which increased over time, and a significant difference between sexes was found (males: 0.82 ± 0.11; females: 0.62 ± 0.38). The average generation interval was 7.57 years. The number of founders, effective founders, ancestors, and founder genomes were 575, 115, 47, and 22.22, respectively, which suggests that an unequal use of founders and a random loss of alleles from founders occurred over time. The level of inbreeding was 0.019 and increased to 0.023, when the inbreeding coefficient was calculated by assigning inbreeding of contemporaries to founders. These levels of inbreeding lead to an effective population size of 138.5 and 117.9 and to a 0.36% and 0.42% rate of inbreeding, respectively. Out of 267 herds with more than five registered breeding animals, only one nucleus herd was present, whereas 117 and 119 were classified as multiplier and commercial herds, respectively. About 92% of calves were sired by French bulls; but the use of Colombian bulls for breeding is increasing. The Colombian Normande breed is at an acceptable level of genetic variability, although some losses of founder alleles have occurred. As the level of inbreeding has been increasing, inbreeding and mating strategies should be monitored in order to maintain the genetic diversity of the breed.
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Blair-West, J. R., D. A. Denton, M. J. McKinley und R. S. Weisinger. „Thirst and brain angiotensin in cattle“. American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 262, Nr. 2 (01.02.1992): R204—R210. http://dx.doi.org/10.1152/ajpregu.1992.262.2.r204.
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Cows that were normally hydrated or deprived of water were given intravenous or intracerebroventricular (icv) infusions of angiotensin I converting-enzyme inhibitors (CEI) or angiotensin II antagonists. Normally hydrated Na-deficient cows increased water intake in a dose-related manner in response to icv infusion of angiotensin I (n = 5). The response to 3 micrograms/h angiotensin I was abolished by concurrent icv infusion of the CEI captopril at 3 mg/h but not by intravenous infusion of captopril at 120 mg/h, which reduced Na appetite (n = 5). The icv infusion of captopril at 12 mg/h did not reduce the water intake of cows that were water restricted for 26.5 h (n = 4) or water restricted and Na deficient (n = 4). The icv infusion of the more lipophilic CEI ramipril at 3 mg/h (n = 7) did not reduce the water intake of normally hydrated or dehydrated cows but reduced the "need-free" intake of Na solution by dehydrated cows. The icv infusion of the nonpeptide antagonist Du Pont 753 at 3 mg/h (n = 7) reduced water intake in dehydrated cows. The results indicate that brain angiotensin may be involved in thirst in cattle. The data suggest that this brain angiotensin II may be formed by a pathway that does not include converting enzyme and that is sited inside the blood brain barrier, possibly in the median preoptic nucleus.
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Boichard, D., F. Guillaume, A. Baur, P. Croiseau, M. N. Rossignol, M. Y. Boscher, T. Druet et al. „Genomic selection in French dairy cattle“. Animal Production Science 52, Nr. 3 (2012): 115. http://dx.doi.org/10.1071/an11119.
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Genomic selection is implemented in French Holstein, Montbéliarde, and Normande breeds (70%, 16% and 12% of French dairy cows). A characteristic of the model for genomic evaluation is the use of haplotypes instead of single-nucleotide polymorphisms (SNPs), so as to maximise linkage disequilibrium between markers and quantitative trait loci (QTLs). For each trait, a QTL-BLUP model (i.e. a best linear unbiased prediction model including QTL random effects) includes 300–700 trait-dependent chromosomal regions selected either by linkage disequilibrium and linkage analysis or by elastic net. This model requires an important effort to phase genotypes, detect QTLs, select SNPs, but was found to be the most efficient one among all tested ones. QTLs are defined within breed and many of them were found to be breed specific. Reference populations include 1800 and 1400 bulls in Montbéliarde and Normande breeds. In Holstein, the very large reference population of 18 300 bulls originates from the EuroGenomics consortium. Since 2008, ~65 000 animals have been genotyped for selection by Labogena with the 50k chip. Bulls genomic estimated breeding values (GEBVs) were made official in June 2009. In 2010, the market share of the young bulls reached 30% and is expected to increase rapidly. Advertising actions have been undertaken to recommend a time-restricted use of young bulls with a limited number of doses. In January 2011, genomic selection was opened to all farmers for females. Current developments focus on the extension of the method to a multi-breed context, to use all reference populations simultaneously in genomic evaluation.
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Herrera Gomez, F., F. D. Deb Hovell und C. A. Sandoval Castro. „Urinary recovery of allantoin in normally fed steers“. Proceedings of the British Society of Animal Science 1998 (1998): 80. http://dx.doi.org/10.1017/s1752756200597324.
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Studies in the use of the purine derivatives technique in ruminants have been stimulated by the possible use of this technique as an estimator of the rumen microbial-N supplied to the host animal. The recovery factor influences the estimation of the total purines absorbed and therefore the microbial-N supply. The relationship between exogenous purine input and urinary excretion and recovery has been studied using cattle maintained with the intragastric infusion technique (Orskov et al., 1979). The urinary recovery of exogenous purines has been estimated to be 0.77-0.85 (Chen et al., 1990a, Verbic et al., 1990), and this relationship has been assumed to be applicable to normal feeding situations. To our knowledge there is no data to support or reject this approach. This study examined the urinary recovery of exogenous allantoin input in steers under normal feeding conditions.
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Herrera Gomez, F., F. D. Deb Hovell und C. A. Sandoval Castro. „Urinary recovery of allantoin in normally fed steers“. Proceedings of the British Society of Animal Science 1998 (1998): 80. http://dx.doi.org/10.1017/s0308229600032931.
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Studies in the use of the purine derivatives technique in ruminants have been stimulated by the possible use of this technique as an estimator of the rumen microbial-N supplied to the host animal. The recovery factor influences the estimation of the total purines absorbed and therefore the microbial-N supply. The relationship between exogenous purine input and urinary excretion and recovery has been studied using cattle maintained with the intragastric infusion technique (Orskov et al., 1979). The urinary recovery of exogenous purines has been estimated to be 0.77-0.85 (Chen et al., 1990a, Verbic et al., 1990), and this relationship has been assumed to be applicable to normal feeding situations. To our knowledge there is no data to support or reject this approach. This study examined the urinary recovery of exogenous allantoin input in steers under normal feeding conditions.
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Yasmeen, Roheela, Hifsa Ali Muhammad, Bushra Nisar Khan Bushra Nisar Khan, Syeda Shazia Bokhari, Uzma Rafi und Aisha Qurashi. „Microbial Diversity in Gut of Cattle Egrets (Bubulcus Ibis) On Exposure to Different Environment“. Lahore Garrison University Journal of Life Sciences 3, Nr. 1 (22.04.2020): 23–30. http://dx.doi.org/10.54692/lgujls.2019.030152.
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Cattle egrets (Bubulcus ibis) normally nest near water and normally feed in grass or wetlands. But now, they are changing their habitat and are also seen feeding on crop fields and garbage dumping sites. The study was conducted to assess gut flora of locally matured cattle egret exposed to different environments. The sampling was carried out in winter season of 2017 at two sites of Lahore, Havalian Karbath (rural, site 1) and Mehmood Booti (urban, site 2). The microbial analysis was carried out to find out diversity in bacterial fauna present in gut (stomach and intestine) of cattle egrets. The total of eight bacterial isolates was collected from stomach and intestine of site 1 and site 2. The characteristics study of bacterial isolates was based on morphological and biochemical tests. The bacterial isolates from site 1 were noticed as Bacillus spp. and Staphylococcus spp. However, from site 2, Staphylococcus spp., Listeria spp. and Streptococcus spp. were isolated. It was concluded on morphological characterization of isolates that diverse morphology of bacteria associated with gut flora of cattle egret on exposure to different environmental sites. However, a detailed study at species level is required to identify disease causing ability of microbes.
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Mesbah-Uddin, M., C. Hoze, P. Michot, A. Barbat, R. Lefebvre, M. Boussaha, G. Sahana, S. Fritz, D. Boichard und A. Capitan. „A missense mutation (p.Tyr452Cys) in the CAD gene compromises reproductive success in French Normande cattle“. Journal of Dairy Science 102, Nr. 7 (Juli 2019): 6340–56. http://dx.doi.org/10.3168/jds.2018-16100.
Der volle Inhalt der QuelleDissertationen zum Thema "Normandy cattle"
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Claridge, Jennifer. „Does Fasciola hepatica infection increase the susceptibility of cattle to infection with other pathogens normally controlled by a Th1 or pro-inflammatory response?“ Thesis, University of Liverpool, 2012. http://livrepository.liverpool.ac.uk/9455/.
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Fasciola hepatica is a trematode parasite with wide geographical and host ranges, primarily affecting ruminants in the United Kingdom. Infection of host animals leads to significant economic losses in production, with reduced weight gains and milk quality and quantity. Clinical disease, known as fasciolosis, is expensive to treat and causes significant morbidity and mortality. More than three quarters of dairy herds surveyed in England and Wales have been exposed to this parasite, and the number of diagnoses of fasciolosis, made by the Animal Health Veterinary Laboratories Agency, has increased dramatically in the last fifteen years. Experimental studies have demonstrated failure to diagnose bovine tuberculosis (BTB) when co-infection with F. hepatica is present. In Chapter 2, we demonstrate a novel method for estimating the prevalence of BTB in England and Wales and show that, in light of the imperfect diagnostic test for BTB, the prevalence may be significantly higher than currently reported. In Chapter 3, a logistic regression model for the presence or absence of BTB on farms in England and Wales is designed, based upon those previously published. The addition of a variable to describe the burden of F. hepatica found in the locality of each farm significantly increases the predictive power of the model and may help to explain the under-diagnosis of BTB suggested in Chapter 2. A significant, negative association is demonstrated between F. hepatica exposure and the BTB status of the farm. The difference between the model predictions for BTB status made with F. hepatica exposure as tested and the predictions made assuming F. hepatica exposure is negative is then calculated to provide an estimate of the missing BTB diagnoses due to co-infection. We show this under-ascertainment to be over one third of cases. The significant, negative association between F. hepatica exposure and BTB diagnosis described at the herd level in Chapter 3, is then tested on an animal level. In Chapter 4, milk samples from individual animals testing negative and inconclusive, or negative and positive to the BTB test are assessed using the anti-F. hepatica antibody ELISA and an exposure value obtained. Significantly higher exposure to F. hepatica was not found in either pairing of BTB outcome-cattle and potential reasons for this are discussed. Chapter 5 investigates the association between F. hepatica exposure and other infectious diseases such as Bovine Viral Diarrhoea virus (BVDv), Leptospira spp, Infectious Bovine Rhinotracheitis, Johnes Disease and Neospora caninum. A random effects model is constructed using information collected about animal and farm parameters, to predict F. hepatica exposure. Vaccination against BVDv and Leptospira spp are shown to be significantly associated, the former being positively and the latter being negatively correlated. Johnes Disease prevalence is negatively associated with F. hepatica exposure and Salmonella Dublin prevalence is positively associated. Farm management and husbandry variables were also found to be significantly associated with F. hepatica exposure. In total, this thesis adds to the growing realisation that co-infection with this pathogen can have significant repercussions on the diagnostic ability of the BTB test and on the health and welfare of the national herd.
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KABÁTKOVÁ, Zdenka. „Chov normandského skotu v České republice“. Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-53525.
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The aim of this diploma work was to review the current state of breeding of Normande cattle in Czech republic. The reason for introducing the breeding of this cattle is some of its qualities. The most important of these include a higher percentage of casein in milk as well as good conversion of nutrients from the bulk feed and meat quality. Monitoring of cattle took place in four separate farms in years 2005 - 2009. There was created basic monitored group from pure Normande breed. Control groups were from pure Holstein dairy cattle, Czech Spotted dairy cattle. Fertility evaluation was done by following four indicators: age at first calving, insemination interval, service period and interlude. Evaluation of efficiency was based on milk production, protein production and content of the milk constituents. Results of fertility show that with the exception of age of first calving (832 days), the breeding goal hasn't been met to Breeders Association of Normande cattle. Value of insemination interval was 88,74 days, value of service period was 134,28 days and value of interlude was evaluated at 462,38 days. When we compare the Normande breed with Holstein breed, milk production of Normande breed is lower about 2025,4 kg, as well as lower protein production about 48,6 kg. Difference between fertility results for both breeds is within statistical discrepancy. In comparison with the Czech Spotted breed, the Normande breed is at least competitive in both indicators: fertility and efficiency as well. Content of milk constituents in Normande cows milk is significantly higher than in the milk of the other two breeds (4,38 to 4,41% of fat, 3,76 to 3,81% of protein, 4,89 to 5,20% of lactose). There was the highest culling (57.4%) in the basic selection of pure Normande dairy cows in comparison to selections of other breeds. The main reason for discarding were the other health reasons.
Bücher zum Thema "Normandy cattle"
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McCormick, Finbar, und Emily Murray. The zooarchaeology of Medieval Ireland. Herausgegeben von Umberto Albarella, Mauro Rizzetto, Hannah Russ, Kim Vickers und Sarah Viner-Daniels. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199686476.013.15.
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This paper presents an overview of the main trends in animal exploitation in the Medieval period in Ireland as revealed by the zooarchaeological data. Cattle dominated the farming economy and diet throughout the period with dairying being their principal role. Sheep are consistently present. The growth of the wool trade after the Anglo-Norman conquest is evident in assemblages from the east and southeast, though it is not a strong trend with their use as a source of meat persisting throughout the Medieval period. An urban–rural dichotomy is also evident in the exploitation of pigs, goats, cats, dogs, and domestic poultry. The native Irish clearly took little interest in the exploitation of wild animals, unlike the Anglo-Normans for whom the consumption and hunting of game played an important role.
Buchteile zum Thema "Normandy cattle"
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Bella, Tancredi. „La cathédrale normande de Catane (XIe siècle). Nouvelles données d’une recherche en cours“. In Regards croisés sur le monument médiéval, 125–40. Turnhout, Belgium: Brepols Publishers, 2018. http://dx.doi.org/10.1484/m.csm-eb.5.116251.
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Cullingford, Elizabeth Butler. „The Love Poems, edited with an introduction and notes by A. Norman Jeffares (London: Kyle Cathie, 1990) 146 pp.“ In Yeats and Women, 380–81. London: Palgrave Macmillan UK, 1992. http://dx.doi.org/10.1007/978-1-349-11928-8_24.
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Roffe, David. „The Mystique of the Book“. In Domesday, 1–16. Oxford University PressOxford, 2000. http://dx.doi.org/10.1093/oso/9780198208471.003.0001.
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Abstract On Christmas Day 1085 William, duke of Normandy and conqueror and king of England, had much thought and deep discussion with his council at Gloucester about England: how it was occupied or with what sort of people. Then he sent his men over all England into every shire and had them find out how many hundred hides there were in the shire, or what land and cattle the king himself had in the country, or what dues he ought to have in twelve months from the shire. Also he had a record made of how much land his archbishops had, and his bishops and his abbots and his earls—and though I relate it at too great length—what or how much everyone had who was occupying land in England, in land or cattle, and how much money it was worth. So very narrowly did he have it investigated, that there was no single hide nor virgate of land, nor indeed (it is a shame to relate but it seemed no shame for him to do) one ox nor one cow nor one pig which was there left out, and not put down in his record; and all these records were brought to him afterwards.
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Hoogesteijn, Rafael, Almira Hoogesteijn und Edgardo Mondolfi. „Jaguar predation and conservation: cattle mortality caused by felines on three ranches in the Venezuelan Llanos“. In Mammals as Predators, 391–407. Oxford University PressOxford, 1993. http://dx.doi.org/10.1093/oso/9780198540670.003.0020.
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Abstract The most important prey species taken by jaguar are given for the Llanos area of Venezuela, and compared with dietary analyses conducted elsewhere. In three studies carried out in seasonally flooded savannah, cattle constituted 35, 48 and 56% of total prey killed by jaguar. Causes predisposing jaguars to prey on cattle are deforestation (loss of habitat), poaching of the jaguar and its prey, and rudimentary herd management. In two studies, 75% and 53% of jaguars killed while preying on cattle exhibited man-inflicted wounds diminishing the cat’s ability to hunt normally. Physical and ecological features are described for three cattle ranches on seasonally flooded savannah. Mortality and loss of calves caused by felines on these well-managed ranches are compared with other causes. On one ranch calf mortality increased following measures aimed at the conservation of jaguars and other fauna. However, predation rates were considerably less than other causes of pre- and post natal calf mortality and accounted for 6% of all calf losses or deaths. On another ranch, in an area of greater agricultural development and poaching, feline predation caused 30% of total calf losses or deaths. Predation was less significant on a third ranch. Counter-measures to diminish predation included fencing areas of gallery forest to restrict access by cattle, pasturing pregnant cows or cows with small calves in open fields or savannah away from forested areas, and controlling the poaching of jaguars and their wild prey. Translocation and sport hunting of jaguars were found to be unsatisfactory methods for controlling predation problems.
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Guérin, Thomas. „Le manoir du Catel à Écretteville-lès-Baons (Seine-Maritime) : enjeux et résultats de l’opération programmée (2013-2015)“. In Journées archéologiques de Normandie, 209–19. Presses universitaires de Rouen et du Havre, 2018. http://dx.doi.org/10.4000/books.purh.17480.
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Rives, J. B. „The Economics of Animal Sacrifice“. In Animal Sacrifice in the Roman Empire (31 BCE-395 CE), 26–40. Oxford University PressNew York, 2024. http://dx.doi.org/10.1093/oso/9780197648919.003.0002.
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Abstract This chapter examines the economic dimensions of animal sacrifice. The environmental conditions of the ancient Mediterranean meant that the sorts of large domestic animals that were normally sacrificed were valuable resources that most people could not afford to consume very often. There were, however, important variables. The major groups of edible domestic animals (cattle, sheep/goats, and pigs) differed in both the costs and the benefits of their production. There were also differences in the goals of peasant and elite animal production: the former focused on diversification and risk reduction, the latter on the exploitation of resources to maintain social status. In these conditions, animal sacrifice not only demonstrated piety to the gods but also communicated information about economic and social status. Different types of sacrificial victims commanded greater or lesser prestige in inverse correlation with their availability and cost: bovines were more prestigious than smaller species, fully grown adults more than young animals. Animal sacrifice was thus a practice that marked elite status and simultaneously produced a highly desirable consumer good: high-quality meat. For both reasons, it served as an efficient instrument for articulating the unequal social relationship between those with greater and lesser economic resources.
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Taber, Douglass F. „Substituted Benzenes: The Garg Synthesis of Tubingensin A“. In Organic Synthesis. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190646165.003.0062.
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John F. Hartwig of the University of California, Berkeley devised (Science 2014, 343, 853) conditions for the regioselective silylation of an arene 1 to give 2. The silyl group can directly be converted, inter alia, to halo, amino, alkyl, or hydroxyl. Jin-Quan Yu of Scripps La Jolla effected (Angew. Chem. Int. Ed. 2014, 53, 2683) regioselective alkenylation of the arene 3 with 4 to give 5. Wei-Liang Duan of the Shanghai Institute of Organic Chemistry described (Org. Lett. 2014, 16, 500) a related alkenylation protocol. Deping Wang of Henyang Normal University developed (Eur. J. Org. Chem. 2014, 315) inexpensive conditions for the conversion of an aryl bromide 6 to the corresponding phenol 7. Mamoru Tobisu and Naoto Chatani of Osaka University used (J. Am. Chem. Soc. 2014, 136, 5587) a Ni catalyst to convert the lactam 8 to the aryl boronate 9. Patrick J. Walsh of the University of Pennsylvania found (Adv. Synth. Catal. 2014, 356, 165) conditions for the clean monoarylation of the amide 11 with 10 to give 12. In an application of the Catellani approach, Zhi- Yuan Chen of Jiangxi Normal University coupled (Chem. Eur. J. 2014, 20, 4237) the aryl iodide 13 with 14 to give the amino ester 15. Frederic Fabis of the Université de Caen-Basse-Normandie used (Chem. Eur. J. 2014, 20, 7507) Pd to catalyze the ortho halogenation (and alkoxylation) of the N-sulfonylamide 16 to give 17. Wen Wan of Shanghai University and Jian Hao of Shanghai University and the Shanghai Institute of Organic Chemistry effected (Chem. Commun. 2014, 50, 5733) ortho azidination of the aniline 18 with 19, leading to 20. Jianbo Wang of Peking University found (Angew. Chem. Int. Ed. 2014, 53, 1364) that the N-aryloxy amide 21 could be combined with the α-diazo ester 22 to give the ortho-alkenyl phenol 23. Silas P. Cook of Indiana University uncovered (Org. Lett. 2014, 16, 2026) remarkably simple conditions for the enantiospecific cyclization of 24 (65% ee) to 25 (63% ee). The development of arynes as reactive intermediates continues unabated. Xiaoming Zeng of Xi’an Jiaotong University developed (Org. Lett. 2014, 16, 314) the reagent 27 for the bis-functionalization of the aryne derived from 26.
Konferenzberichte zum Thema "Normandy cattle"
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Grohs, C., J. Corbeau, J. Jourdain, M. Boussaha, V. Plassard, A. Barbat, C. Hamelin et al. „521. A de novo missense mutation of COL1A1 causes osteogenesis imperfecta type 2 and premature delivery in Normande Cattle“. In World Congress on Genetics Applied to Livestock Production. The Netherlands: Wageningen Academic Publishers, 2022. http://dx.doi.org/10.3920/978-90-8686-940-4_521.
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Marc, Simona, Oana Maria Boldura, Jelena Savici, Cristina Paul und Gabriel Otava. „HYSTOLOGICAL INVESTIGATION OF HYPOSPADIAS IN A CROSSBRED CALF WITH SYNDROMIC EVOLUTION“. In 23rd SGEM International Multidisciplinary Scientific GeoConference 2023. STEF92 Technology, 2023. http://dx.doi.org/10.5593/sgem2023v/6.2/s29.92.
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Hypospadias is a developmental abnormality in which the male urethra opens on the underside of the penis or on the perineum and can be accompanied by penile aplasia or hypoplasia, hypoplasia of the corpus cavernosum, incomplete formation of the prepuce, or cryptorchidism [1]. In animals, it rarely appears in horses, sheep, goats, cattle, dogs, and cats as isolated cases with urogenital anomaly or with other abnormalities [2,3]. The aim of this paper is to present the hystological results in a crossbred calf seen with anterior hypospadias with syndromic evolution. Clinically, the penile urethra ventrally opened at approximately 4 cm caudal of the normal opening of the urethra, also, the prepuce was incompletely developed and had failed to fuse normally. The Hematoxylin-Eosin method was used for hystological examination of the urethra. Microscopically, the urethra wall was composed of mucosa with epithelium and lamina propria, vascular layer, thin muscle layer, and adventitia, a lax connective tissue. The formation that should be the corpus cavernosum was separated from the body of the corpus spongiosum and urethra. In the center of the structure there was a connective tissue strand made of converging trabeculae. However, between the trabeculae, where the cavernous spaces should be, there was an abundance of monolocular adipocytes. In conclusion, histological examination revealed the normal structure of the urethra with adipose degeneration into the corpus cavernosum.
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Lugo, Ana M., Cinthia Audivet Durán und Marco E. Sanjuán. „Tuning and Implementation of a Feedback Control Strategy for Drying Process Based on IAE Minimization“. In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-67291.
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Agricultural products contain a significant amount of moisture during the harvesting stage. The presence of this moisture increases the deterioration rate of the products during storage, handling, and processing periods; drying is one of the most suitable processes that can be applied to these by-products before using them as cattle feed or soil conditioner. This process is certainly one of the most energy consuming found in industry. The selection of an appropriate process control strategies can minimize production and maintenance cost, maximize product quality and reduce environmental pollution. Rotary dryers are normally employed to dry agricultural products because it can give high production rate and high drying uniformity. The aim of this research is to improve the performance of a feedback control strategy for a drying process, based on the implementation design of experiment; this approach allows finding specifics tuning parameters and potential operation conditions that will traduce in a more robust process. The selected criterion to evaluate the performance of the strategy is the integral absolute of the error (IAE) and the analysis is based on a dynamic model of a rotary dryer. The objective of the process improvement is to find an operation region, function of the controller gain, the integral time and derivative time, in which IAE parameter is minimized, this will lead to enhancement of equipment performance and reduction of the wear of the final control element. Once the controlled strategy is described, the methodology states an exploratory stage, for process characterization, establishment of a regression model, to describe the relation between experiment significant factors and response variable, maximum ascent route, exploration of a possible curvature, definition of a new regression model and finally determination of a new optimum operating point.