1,141 research outputs found
THE FUTURE OF VETERINARIANS IN DAIRY HERD HEALTH MANAGEMENT
The future of the Veterinary Practice in Dairy Health Management has changed and will change more drastically from our point of view in the next years. The consumer’s pressure and the Media are more and more concerned about animal welfare, traceability of animal products and safety of products of animal origin. On the other hand the Farmers in Europe have to produce under strong rules (competing with other countries outside Europe), which are normally very expensive to put in practice, and the veterinarians should adapt their knowledge to the new challenges, because without their work and cooperation, dairy farming will have no future. In that sense, the old veterinary practice has to go in other ways, otherwise the Veterinarians will loose clients and the animal population in Europe will be reduced. The Dairy farmers will ask for support in other areas besides clinical: efficacy, management, welfare, profitability, nutrition, prophylaxis, economics, reproduction, environmental protection, grassland management, etc.Cattle practitioners should be able to give answers in several subjects and this sets the challenge to our profession - Veterinary preparation has to be very strong in single animal species, particularly in Dairy or beef cows. The cattle practitioner has to look beyond, but he should never forget that “the single animal” has to be looked at as one unit of the herd, which means that without a very good knowledge of the single animal he will be insufficiently prepared to solve herd problems, and the Herd is the sum of several animals. We all know that very often one single animal allows us to implement herd strategies and develop prophylactic programs.We are convinced that the veterinary profession, and in our case the Cattle Medicine should have the ability to evolve, otherwise the Veterinarian as we know him will miss the train in the next years
Controlling Factors Determining The Selective Hscn Addition To Double Bonds And Their Application To The Synthesis Of 7-isothiocyano-7,8-α-dihydro-bisabolene
The reactivity of terminal and trisubstituted double bonds of monoterpenes with HSCN has been examined by GC giving evidence that kinetics is responsible for the chemoselective addition to terminal double bonds in terpenes. The results show that the addition to the terminal double bond is about 17 times faster than for trisubstituted double bonds and that the presence of the first SCN group in the molecule prevents a second addition. The presence of a hydroxyl or methoxy group in the molecule, decreases the reaction kinetics. Based on these kinetic experiments a two steps synthesis of the natural product 7-isothiocyano-7,8-dihydro-α-bisabolene using bisabolol as starting material, was planned and successfully accomplished.125661666Drobnica, L., Kristían, P., Augustín, J., The Chemistry of the Cyanates and Their Thio Derivatives, , Saul Patai Ed., John Wiley & Sons, New YorkEdenborough, M.S., Herbert, R.B., (1988) Nat. Prod., p. 229Faulkner, D.J., (1994) Nat. Prod., p. 355(1993) Nat. Prod., p. 497(1992) Nat. Prod., p. 323(1991) Nat. Prod., p. 97(1990) Nat. Prod., p. 269(1988) Nat. Prod., p. 613Fraga, B.M., (1994) Nat. Prod. Rep., p. 533Piers, E., Young, B.W.A., Rettig, S.J., (1987) Tetrahedron, 43 (23), p. 5521Piers, E., Yeung, B.W., (1986) Can. J. Chem., 64, p. 2475Chenera, B., Chuang, C.P., Hart, D.J., Lai, C.S., (1992) J. Org. Chem., 57, p. 2018Da Silva, C.C., Almagro, V., Zukerman-Schpector, J., Castellano, E.E., Marsaioli, A.J., (1994) J. Org. Chem., 59, p. 2880Da Silva, C.C., Almagro, V., Marsaioli, A.J., (1993) Tetrahedron Lett., 34, p. 6717Martin, V.S., Woodward, S.S., Katsuki, T., Yamada, Y., Ikeda, M., Sharpless, K.B., (1981) J. Am. Chem. Soc., 103, p. 6237Rakels, J.L., Straathof, A.J.J., Heijnin, J.J., (1993) Enzyme Microb. Technol, 15, p. 1051Diveley, W.R., Buntin, G.A., (1969) J. Org. Chem., 34, p. 616Queiroga, C.L., Ferracini, V.L., Marsaioli, A.J., (1996) Phytochemistry, 42, p. 1097(-)Bisabolol (8) [(αS, 1S)-1-methanol-α,4-dimethyl-α-4-methyl-3-pentenyl-3-cyclohexene] was obtained from commercial candeia oil (CITRÓLEO - S.Paulo, SP, Brazil)Sullivan, B.W., Faulkner, D.J., Okamoto, K.T., Chen, M.H.M., Clardy, J., (1986) J. Org. Chem., 51, p. 5134Dubois, J.E., Lomas, J.S., (1971) Tetrahedron Lett., 7, p. 599Delay, F., Ohloff, F., (1979) Helv. Chem. Acta, 62, p. 326A sample of dihydrolimonene was kindly provided by Prof. Marcio C. S. de Mattos from IQ/UFRJ, RJ, Brazi
THE FUTURE OF VETERINARIANS IN DAIRY HERD HEALTH MANAGEMENT
The future of the Veterinary Practice in Dairy Health Management has changed and will change more drastically from our point of view in the next years. The consumer’s pressure and the Media are more and more concerned about animal welfare, traceability of animal products and safety of products of animal origin. On the other hand the Farmers in Europe have to produce under strong rules (competing with other countries outside Europe), which are normally very expensive to put in practice, and the veterinarians should adapt their knowledge to the new challenges, because without their work and cooperation, dairy farming will have no future. In that sense, the old veterinary practice has to go in other ways, otherwise the Veterinarians will loose clients and the animal population in Europe will be reduced. The Dairy farmers will ask for support in other areas besides clinical: efficacy, management, welfare, profitability, nutrition, prophylaxis, economics, reproduction, environmental protection, grassland management, etc.Cattle practitioners should be able to give answers in several subjects and this sets the challenge to our profession - Veterinary preparation has to be very strong in single animal species, particularly in Dairy or beef cows. The cattle practitioner has to look beyond, but he should never forget that “the single animal” has to be looked at as one unit of the herd, which means that without a very good knowledge of the single animal he will be insufficiently prepared to solve herd problems, and the Herd is the sum of several animals. We all know that very often one single animal allows us to implement herd strategies and develop prophylactic programs.We are convinced that the veterinary profession, and in our case the Cattle Medicine should have the ability to evolve, otherwise the Veterinarian as we know him will miss the train in the next years
Temperatura E Substrato Na Germinação De Sementes De Plukenetia Volubilis L.
The objective of this work was to evaluate the effect of temperature and substrate on the germination of P. volubilis seeds. Seeds harvested from 25 matrix plants were submitted, in two studies, to conditions of (i) sowing in rolled paper towel at the temperatures of 10, 15, 20, 25, 30, 35, 40, and 45 °C, for the evaluation of germination, first count of germination, germination speed index and mean time for germination, and (ii) sowing in the substrates paper towel, sand, Bioplant®, Bioplant® and micron, superfine, fine, medium and coarse vermiculite. The same evaluations mentioned in the first study were conducted at the temperature of 30 oC, as well as plant growth. The treatment replicates were distributed in a completely randomized block design and the effects of temperature were compared by polynomial regression analysis. The substrates were compared by the Scott-Knott test at 0.05 probability level. The data show that the ideal range of temperature for the germination of P. volubilis is between 25 and 30 °C. The temperature of 20 °C is the minimum for germination and those above 35 °C are lethal to these seeds. The most favorable substrate for P. volubilis seed germination is micron or fine vermiculite. © 2016, Departamento de Engenharia Agricola - UFCG/Cnpq. All rights reserved.20111031103
Seroprevalence of Coxiella burnetii antibodies in human immunodeficiency virus-positive patients in Jacarepaguá, Rio de Janeiro, Brazil
Prediction of lamb body composition using in vivo bioimpedance analysis
The objective of this study was to evaluate the potential of in vivo bioimpedance analysis (BIA) as a method to estimate body composition in lambs. Thirty-one Texel x Ile de France crossbreed ram lambs were slaughtered at pre-determined intervals of average weights of 20, 26, 32, and 38 kg. Before the slaughter of the animals, their body weight (BW) and body length (BL) were measured. The values for resistance (Rs) and reactance (Xc) were collected using a single-frequency BIA equipment (Model RJL Quantum II Bioelectrical Body Composition Analyzer). The BIA main variables such as body bioelectrical volume (V), phase angle (PA), resistive density (RsD), and reactive density (XcD) were then calculated. The soft tissue mass of the right-half cold carcass was analyzed in order to determine its chemical composition. Multiple regression analyses were performed using the lamb body composition as dependent variables and the measurements related to bioimpedance as independent variables. The best regression models were evaluated by cross-validation. The predictive model of moisture mass, which was developed by using XcD and V, accounted for 84% of its variation. Resulting models of percentage moisture (R2 = 0.79), percentage lean mass (R2 = 0.79), percentage fat (R2 = 0.79), and fat mass (R2 = 0.87) were obtained using RsD and V. Furthermore, the values of RsD regarding V, and PA in the prediction models accounted for 91% and 89% of variation in protein mass and lean mass, respectively. Bioimpedance analysis proved to be an efficient method to estimate the body composition of lambs slaughtered at different body mass stages
Field theoretic description of charge regulation interaction
In order to find the exact form of the electrostatic interaction between two
proteins with dissociable charge groups in aqueous solution, we have studied a
model system composed of two macroscopic surfaces with charge dissociation
sites immersed in a counterion-only ionic solution. Field-theoretic
representation of the grand canonical partition function is derived and
evaluated within the mean-field approximation, giving the Poisson-Boltzmann
theory with the Ninham-Parsegian boundary condition. Gaussian fluctuations
around the mean-field are then analyzed in the lowest order correction that we
calculate analytically and exactly, using the path integral representation for
the partition function of a harmonic oscillator with time-dependent frequency.
The first order (one loop) free energy correction gives the interaction free
energy that reduces to the zero-frequency van der Waals form in the appropriate
limit but in general gives rise to a mono-polar fluctuation term due to charge
fluctuation at the dissociation sites. Our formulation opens up the possibility
to investigate the Kirkwood-Shumaker interaction in more general contexts where
their original derivation fails.Comment: 12 pages, 9 figures, submitted to EPJ
Quality Of Sleep And Quality Of Life In Adolescents Infected With Human Immunodeficiency Virus [qualidade Do Sono E Qualidade De Vida Em Adolescentes Infectados Pelo Vírus Da Imunodeficiência Humana]
Objectives: To assess sleep characteristics of adolescents infected by HIV, and to ascertain whether psychosocial aspects are associated to the quality of sleep. Methods: A cross-sectional study assessing 102 HIV-infected adolescents of both genders, aged between 10 and 20 years-old and 120 Controls. Data collection was performed by applying the Sleep Disturbance Scale for Children, the Epworth Sleepiness Scale, and the Pediatric Quality of Life Inventory. Results: A sleep disturbance prevalence of 77.4% was found in patients, and a 75% prevalence in controls, and there was correlation between quality of sleep and of life. HIV-infected adolescents scored higher for sleep breathing disorders and had higher prevalence of excessive daytime sleepiness. Conclusions: HIV-infected adolescents had similar quality of sleep compared to healthy adolescents. This may be explained by the steady improvements in daily living as a result of successful anti-retroviral therapy, and by the vulnerability that affects Brazilian adolescents living in major urban centers.706422427Carskadon, M.A., Sleep in adolescents: The perfect storm (2011) Pediatr Clin North Am, 58, pp. 637-647Owens, J.A., Belon, K., Moss, P., Impact of delaying school start time on adolescent sleep, mood, and behavior (2010) Arch Pediatr Adolesc Med, 164, pp. 608-614de-la-Llata-Romero, M., Castorena-Maldonado, A., Corsi-Cabrera, M., Sleep medicine: Development, contributions and perspectives Report of the work group on sleep medicine (2011) Rev Invest Clin, 63, pp. 90-99Mindell, J.A., Owens, J., Alves, R., Give children and adolescents the gift of a good night's sleep: A call to action (2011) Sleep Med, 12, pp. 203-204Moore, M., Meltzer, L.J., The sleepy adolescent: Causes and consequences of sleepiness in teens (2008) Paediatr Respir Rev, 9, pp. 114-120(2010) Global report: UNAIDS report on the global AIDS epidemic, , http://www.unaids.org/globalreport/documents/20101123_GlobalReport_full_en.pdf, Joint United Nations Programme on HIV/AIDS (UNAIDS), [cited 16 May 2011]. Available at(2011) Ministério da Saúde 2010, , http://www.aids.gov.br/publicacao/boletim-epidemiologico-2010, Brasil, Departamento de DST, Aids e Hepatites Virais. Boletim Epidemiológico AIDS 2010 (versão preliminar). [cited 21 March]. Available atHazra, R., Siberry, G.K., Mofenson, L.M., Growing up with HIV: Children, adolescents, and young adults with perinatally acquired HIV infection (2010) Ann Rev Med, 61, pp. 169-185Ramos, A.N., Matida, L.H., Hearst, N., Heukelbach, J., AIDS in Brazilian children: History, surveillance, antiretroviral therapy, and epidemiologic transition, 1984-2008 (2011) AIDS Patient Care STDS, 25, pp. 245-255Franck, L.S., Johnson, L.M., Lee, K., Sleep disturbances in children with human immunodeficiency virus infection (1999) Pediatrics, 104, pp. 1-5Reid, S., Dwyer, J., Insomnia in HIV Infection: A systematic review of prevalence, correlates and management (2005) Psychosomatic Med, 67, pp. 260-269Rocha, C.R.S., Rossini, S., Reimão, R., Sleep disorders in high school and pre-university students (2010) Arq Neuropsiquiatr, 68, pp. 903-907Mesquita, G., Reimão, R., Nightly use of computer by adolescents: Its effect on quality of sleep (2007) Arq Neuropsiquiatr, 65, pp. 428-432Varni, J.W., Seid, M., Rode, C.A., The PedsQL: Measurement model for the pediatric quality of life inventory (1999) Med Care, 37, pp. 126-139(2009) Ministério da Saúde, , Brasil, Secretaria de Vigilância em Saúde. Programa Nacional de DST e Aids. Recomendações para Terapia Antirretroviral em Crianças e Adolescentes Infectados polo HIV. Manual de bolso. Ministério da Saúde, Secretaria de Vigilância em Saúde, Programa Nacional de DST e Aids. Brasília: Ministério da SaúdeBruni, O., Salvatori, O., Guidetti, V., The sleep disturbance scale for children (SDSC) Construction and validation of an instrument to evaluate sleep disturbances in childhood and adolescence (1996) J Sleep Res, 5, pp. 251-261Johns, M.W., A new method for measuring daytime sleepiness: The Epworth sleepiness scale (1991) Sleep, 14, pp. 540-545Ferreira, V.R., Carvalho, L.B.C., Ruotolo, F., Morais, J.F., Prado, L.B.F., Prado, G.F., Sleep disturbance scale for children: Translation, cultural adaptation and validation (2009) Sleep Med, 10, pp. 457-463Bertolazi, N.A., Fagondes, S.C., Hoff, L.S., Pedro, V.D., Barreto, S.S.M., Johns, M.W., Validação da escala de sonolência de Epworth em português para uso no Brasil (2009) J Bras Pneumol, 35, pp. 877-883Klatchoian, D.A., Len, C.A., Terreri, M.T., Quality of life of children and adolescents from São Paulo: Reliability and validity of the Brazilian version of the Pediatric Quality of Life Inventory TM version 4.0 Generic Core Scales (2008) J Pediatr (Rio J), 84, pp. 308-315Potasz, C., Juliano, M.L., Varela, M.J., Prevalence of sleep disorders in children of a public hospital in São Paulo (2010) Arq Neuropsiquiatr, 68, pp. 235-241Carotenuto, M., Bruni, O., Santoro, N., Giudice, E.M., Perrone, L., Pascotto, A., Waist circumference predicts the occurrence of sleep-disordered breathing in obese children and adolescents: A questionnaire-based study (2006) Sleep Med, 7, pp. 357-361Ramalho, L.C.B., Gonçalves, E.M., Carvalho, W.R.G., Abnormalities in body composition and nutritional status in HIV-infected children and adolescents on antiretroviral therapy (2011) Int J STD AIDS, 22, pp. 453-456Chan, E.Y., Ng, D.K., Chan, C.H., Modified Epworth Sleepiness Scale in Chinese children with obstructive sleep apnea: A retrospective study (2009) Sleep Breath, 13, pp. 59-63Melendres, M.C., Lutz, J.M., Rubin, E.D., Marcus, C.L., Daytime sleepiness and hyperactivity in children with suspected sleep-disordered breathing (2004) Pediatrics, 114, pp. 768-775van Litsenburg, R.R., Huisman, J., Hoogerbrugge, P.M., Egeler, R.M., Kaspers, G.J., Gemke, R.J., Impaired sleep affects quality of life in children during maintenance treatment for acute lymphoblastic leukemia: An exploratory study (2011) Health Qual Life Outcomes, 18, pp. 9-25Erickson, J.M., Beck, S.L., Christian, B.R., Fatigue, sleep-wake disturbances, and quality of life in adolescents receiving chemotherapy (2011) J Pediatr Hematol Oncol, 33, pp. 17-25Mitchell, R.B., Boss, E.F., Pediatric obstructive sleep apnea in obese and normal-weight children: Impact of adenotonsillectomy on quality-of-life and behavior (2009) Dev Neuropsychol, 34, pp. 650-661Crabtree, V.M., Varni, J.W., Gozal, D., Health-related quality of life and depressive symptoms in children with suspected sleep-disordered breathing (2004) Sleep, 27, pp. 1131-1138Ong, L.C., Yang, W.W., Wong, S.W., Alsissiq, F., Khu, Y.S., Sleep habits and disturbances in Malaysian children with epilepsy (2010) J Paediatr Child Health, 46, pp. 80-8
How does the replacement of rice flour with flours of higher nutritional quality impact the texture and sensory profile and acceptance of gluten-free chocolate cakes?
Gluten-free bakery products usually use rice flour as substitute for wheat flour. This paper aims to evaluate whether and how the substitution of rice flour for sorghum and teff flour changes the overall acceptance, texture and sensory profile of gluten-free chocolate cakes. An experimental design composed of three factors (rice, sorghum and teff flours) was developed, and formulations were analysed by acceptance test and fibre content. Four formulations were submitted to sensory descriptive analysis. The formulations did not show significant differences in the overall acceptance although the sensory profile has changed. The texture was affected by the type of flour, being the optimised formulation the softer among the samples. From these data, it can be concluded that it is possible to replace rice flour with sorghum and teff flour in chocolate cake formulations, since the change in the sensory profile did not affect the acceptance of the products.info:eu-repo/semantics/publishedVersio
MODELING A COMPUTER APPLICATION FOR MANAGEMENT OF MAINTENANCE ACTIVITIES OF UNPAVED ROADS
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