Consulta: subjectFacets:"Preconditioning"
Registros recuperados: 9
Data/hora: 01/06/2024 04:31:07

Relationships among alcoholic liver disease, antioxidants, and antioxidant enzymes
Provedor de dados: Obihiro University of Agriculture and Veterinary Medicine Academic Repository (OAK)
Autores: Han, Kyu-Ho; Hashimoto, Naoto; Fukushima, Michihiro.
Excessive consumption of alcoholic beverages is a serious cause of liver disease worldwide. The meta-bolism of ethanol generates reactive oxygen species, which play a significant role in the deterioration of alcoholic liver disease (ALD). Antioxidant phytochemicals, such as polyphenols, regulate the expression of ALD-associated proteins and peptides, namely, catalase, superoxide dismutase, glutathione, glutathione peroxidase, and glutathione reductase. These plant antioxidants have electrophilic activity and may induce antioxidant enzymes via the Kelchlike ECH-associated protein 1-NF-E2-related factor-2 pathway and antioxidant responsive elements. Furthermore, these antioxidants are reported to alleviate cell injury caused by oxidants or inflammatory...
Palavras-chave: Electrophile; Mitogen-activating protein kinase; Plant antioxidants; Reactive oxygen species; Preconditioning.
Ano: 2016
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4425

Market Valuation of Preconditioning Feeder Calves
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Avent,   R. Keith; Ward,   Clement E.; Lalman,   David L.
Preconditioning calf programs, while not new, are becoming more prevalent. They provide benefits to cow-calf producers while adding value for feeder cattle buyers. However, questions remain regarding the economic costs and returns of such programs. A model was estimated with data from three consecutive-day sales, to determine the value that buyers place on preconditioning programs and related feeder cattle traits. Our results indicate that price premiums, although evident, appear to be insufficient by themselves to cover the marginal costs of preconditioning.
Tipo: Journal Article
Palavras-chave: Animal health; Feeder cattle; Hedonic model; Marketing; Preconditioning; Prices; Value-added; Q13; Q12; Q11; C23.
Ano: 2004
URL: http://purl.umn.edu/42894

Determinants of Price Differentials in Oklahoma Value-Added Feeder Cattle Auctions
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Williams,   Galen S.; Raper,   Kellie Curry; DeVuyst,   Eric A.; Peel,   Derrell S.; McKinney,   Doug.
Many value-added practices cannot be observed by feeder cattle buyers. Third-party verification can decrease market inefficiency associated with this asymmetric information. We evaluate the effectiveness of a verification program, the Oklahoma Quality Beef Network, in increasing received prices. We estimate the value of verification, weaning, vaccinating, certification and phenotypic traits of feeder cattle at Oklahoma auctions. Results indicate that the OQBN program adds $2.39 to $5.74/cwt. Vaccinating calves adds $1.44/cwt, and weaning calves adds $2.05/cwt. Differential values for lot size, average weight, hide color, frame size, conditioning, Brahman influence, gender and other characteristics are also reported.
Tipo: Article
Palavras-chave: Feeder cattle; Preconditioning; Value-added marketing; Agribusiness; Demand and Price Analysis; Livestock Production/Industries.
Ano: 2012
URL: http://purl.umn.edu/122309

PRICE PREMIUMS FROM A CERTIFIED FEEDER CALF PRECONDITIONING PROGRAM
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Ward,   Clement E.; Lalman,   David L.
Preconditioning calf programs, while not new, are becoming more prevalent. They provide benefits to cow-calf producers while adding value for feeder cattle buyers. However, questions remain regarding the marginal returns from marketing preconditioned calves exceeds the marginal costs for preconditioning. This paper reports estimates from two models to determine the premium paid by feeder cattle buyers for preconditioned calves in the Oklahoma Quality Beef Network (OQBN) program. One model assumes feeder calf characteristics are independent as most previous research. The other assumes interdependency between several characteristics that are affected by preconditioning. Data were from seven feeder calf sales in Oklahoma in 2001 and another seven sales in...
Tipo: Conference Paper or Presentation
Palavras-chave: Animal health; Feeder cattle; Hedonic models; Marketing; Preconditioning; Prices; Value-added; Demand and Price Analysis; Livestock Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/18973

Cost and Benefit Analysis of a Preconditioning Feeder Calf Program
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Donnell,   Jeri; Ward,   Clement E.
Objectives were twofold: Determine key factors influencing preconditioning cost and returns; and determine the premium for age and source verified, preconditioned calves sold at a public livestock market.  Data provided by the Samuel Roberts Noble Foundation show preconditioning returns depend significantly on number of days preconditioned, average daily gain, and cost of vaccinations, hay, feed, and mineral.  Noble Foundation cooperators received a premium for age and source verified, preconditioned feeder cattle when sold at market.  Significant coefficients averaged across five sales conclude that Noble Foundation management practices receive a $2.49/cwt premium when compared to all other cattle sold at market.
Tipo: Conference Paper or Presentation
Palavras-chave: Cattle; Calves; Preconditioning; Prices; Costs; Age and source verification; Marketing.
Ano: 2008
URL: http://purl.umn.edu/42303

Determining the Variation in Certified Preconditioning Premiums for Heifers and Steer
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Schumacher,   Stephanie; Peel,   Derrell S.
This study applies separate hedonic models to Oklahoma Quality Beef Network data to determine differences in the value of preconditioning premiums for steers versus heifers.  Results indicate that preconditioning values are generally lower for heifers but exceed steer premiums at higher weights.  Separate treatment of steers and heifers is validated.
Tipo: Presentation
Palavras-chave: Preconditioning; Steers; Heifers; Marketing.
Ano: 2012
URL: http://purl.umn.edu/119722

Coronary endothelial dysfunction after ischemia and reperfusion: a new therapeutic target?
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Laude,K.; Thuillez,C.; Richard,V.
Although cardiac ischemia is usually characterized as a disease of the myocyte, it is clear that the vasculature, and especially endothelial cells, is also a major target of this pathology. Indeed, using a rat model of ischemia/reperfusion, we were able to detect severe endothelial dysfunction (assessed as a decreased response to acetylcholine) after acute or chronic reperfusion. Given the essential role of the endothelium in the regulation of vascular tone, as well as platelet and leukocyte function, such a severe dysfunction could lead to an increased risk of vasospasm, thrombosis and accelerated atherosclerosis. This dysfunction can be prevented by free radical scavengers and by exogenous nitric oxide. Endothelial dysfunction can also be prevented by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coronary endothelium; Ischemia/reperfusion; Preconditioning.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000100001

Role of mitochondrial ATP-sensitive potassium channel-mediated PKC-ε in delayed protection against myocardial ischemia/reperfusion injury in isolated hearts of sevoflurane-preconditioned rats
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Wang,C.; Hu,S.M.; Xie,H.; Qiao,S.G.; Liu,H.; Liu,C.F.
This study aimed to determine the role of mitochondrial adenosine triphosphate-sensitive potassium (mitoKATP) channels and protein kinase C (PKC)-ε in the delayed protective effects of sevoflurane preconditioning using Langendorff isolated heart perfusion models. Fifty-four isolated perfused rat hearts were randomly divided into 6 groups (n=9). The rats were exposed for 60 min to 2.5% sevoflurane (the second window of protection group, SWOP group) or 33% oxygen inhalation (I/R group) 24 h before coronary occlusion. The control group (CON) and the sevoflurane group (SEVO) group were exposed to 33% oxygen and 2.5% sevoflurane for 60 min, respectively, without coronary occlusion. The mitoKATP channel inhibitor 5-hydroxydecanoate (5-HD) was given 30 min before...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ischemia; Reperfusion; MitoKatp channel; Preconditioning; Protein kinase C.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000600528

Late cardiac perconditioning by phenylephrine in an isolated rat heart model is mediated by mitochondrial potassium channels
Provedor de dados: Brazilian Journal of Pharmaceutical Sciences
Autores: Nazari,Afshin; Sedighi,Mehrnoosh; Dalvand,Parvin; Azizi,Yaser; Moghimian,Maryam; Boroujeni,Shakiba Nasiri.
The present study was designed to investigate the effect of early and late administration of phenylephrine during ischemia against regional ischemia-reperfusion injuries in an isolated rat heart model. All animals were randomly divided into experimental groups: (I) IR (Ischemic/ reperfusion): the hearts underwent 35 min of regional ischemia followed by 60 min of reperfusion; (II) 5HD-IR-0: the hearts were perfused for 5 min with 5HD (5-hydroxydecanoate, specific mKATP channel blocker, 100 µM) at the onset of regional ischemia; (III) 5HD-IR-20: the hearts were perfused for 5 min with 5HD 20 min after regional ischemia; (IV) PE-IR-10: the hearts were perfused for 5 min with phenylephrine 10 min after regional ischemia; (V) PE-IR-30: the hearts were perfused...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenylephrine; Ischemia; Reperfusion; Preconditioning; Cardioprotection.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100561