Effect of Varying Dietary Ratio of Sodium and Chloride on the Responses of Lactating Dairy Cows in Hot Weather

Coppock, C.E.; Grant, P.A.; Portzer, S.J.; Escobosa, Adrian; Wehrly, Thomas E.

doi:10.3168/jds.s0022-0302(82)82233-9

Cited by 14 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The discrepancy between the predicted and the observed milk yield was at least partially explained by the observed level of DMI. The dietary NaCl content had no effect on the level of milk production in the current study, which agrees with earlier studies 30, 31. The Na excretion via milk was numerically lower after feeding the low‐Na ration because of the lower milk yield (low, 13.7 kg day −1 ; medium, 14.9 kg day −1 ; high, 16.4 kg day −1 ).…”

Section: Resultssupporting

confidence: 91%

Synthetic, Reactivity, and Structural Studies on Half‐Sandwich (η⁵‐C₅Me₅)Be and Related Compounds: Halide, Alkyl, and Iminoacyl Derivatives

Conejo

Fernández

Carmona

et al. 2003

Chemistry A European J

View full text Add to dashboard Cite

The half-sandwich compounds [(eta(5)-C(5)Me(5))BeX] (X=Cl, 1 a; Br, 1 b), readily prepared from the reaction of the halides BeX(2) and M[C(5)Me(5)] (M=Na or K), are useful synthons for other (eta(5)-C(5)Me(5))Be organometallic compounds, including the alkyl derivatives [(eta(5)-C(5)Me(5))BeR] (R=Me, 2 a; CMe(3), 2 b; CH(2)CMe(3), 2 c; CH(2)Ph, 2 d). The latter compounds can be obtained by metathetical exchange of the halides 1 with the corresponding lithium reagent and exhibit NMR signals and other properties in accord with the proposed formulation. Attempts to make [(eta(5)-C(5)Me(5))BeH] have proved fruitless, probably due to instability of the hydride toward disproportionation into [Be(C(5)Me(5))(2)] and BeH(2). The half-sandwich iminoacyl [(eta(5)-C(5)Me(5))Be(C(NXyl)Cp')] and [(eta(5)-C(5)Me(4)H)Be(C(NXyl)Cp')]3, 6 where Xyl=C(6)H(3)-2,6-Me(2) and Cp'=C(5)Me(5) or C(5)Me(4)H, are formed when the beryllocenes [Be(C(5)Me(5))(2)], [Be(C(5)Me(4)H)(2)], and [Be(C(5)Me(5))(C(5)Me(4)H)] are allowed to react with CNXyl. Isolation of three different iminoacyl isomers from the reaction of the mixed-ring beryllocene [(eta(5)-C(5)Me(5))Be(eta(1)-C(5)Me(4)H)] and CNXyl, namely compounds 5 a, 5 b, and 6, provides compelling evidence for the existence in solution of different beryllocene isomers, generated in the course of two very facile processes that explain the solution dynamics of these metallocenes, that is the 1,5-sigmatropic shift of the Be(eta(5)-Cp') unit around the periphery of the eta(1)-Cp' ring, and the molecular inversion rearrangement that exchanges the roles of the two rings.

show abstract

Section: Resultssupporting

confidence: 91%

Synthetic, Reactivity, and Structural Studies on Half‐Sandwich (η⁵‐C₅Me₅)Be and Related Compounds: Halide, Alkyl, and Iminoacyl Derivatives

Conejo

Fernández

Carmona

et al. 2003

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…The discrepancy between the predicted and the observed milk yield was at least partially explained by the observed level of DMI. The dietary NaCl content had no effect on the level of milk production in the current study, which agrees with earlier studies (Coppock et al, 1982;Granzin and Gaughan, 2002). The Na excretion via the milk was numerically lower after feeding the low-Na ration because of lower milk yield (low, 13.7 kg/d; medium, 14.9 kg/d; high, 16.4 kg/d).…”

Section: Resultssupporting

confidence: 91%

Sodium and protein nutrition of lactating cows under tropical conditions

Thiangtum¹

View full text Add to dashboard Cite

Table of Contents Chapter 1 General introduction Chapter 2 An initial investigation into the relationship between ration composition and milk production of dairy cows in Thailand: A cross sectional study Chapter 3 An attempt to define the sodium requirement of lactating dairy cows in a tropical environment Chapter 4 Response of salivary Na/K ratio to changing Na supply of lactating cows under tropical conditions Chapter 5 Effect of dietary protein levels on rumen metabolism and milk yield in mid-lactating cows under hot and humid conditions

show abstract

“…Resultados semelhantes foram obtidos por ERDMAN et al (1980), COPPOCK et al (1982), NESTOR et al (1988), SANCHEZ et al (1994) e ROCHE et al (2005.…”

Section: Pressão Parcial De Dióxido De Carbonounclassified

Dietas catiônicas no desempenho e parâmetros ácido-base de vacas em lactação

Correa¹

View full text Add to dashboard Cite

Dietas catiônicas no desempenho e parâmetros ácido-baseGabriel e Julia, pela compreensão da minha ausência e por todo o estímulo e apoio para que eu nunca desistisse de nenhum desafio. Dedico AGRADECIMENTOSAos meus irmãos, Lucas e Douglas, pela amizade e companheirismo.À minha querida vovó Myrtes, por todo amor e dedicação em todos os anos de minha vida.Ao meu tio João Fábio, por toda a força e incentivo aos estudos.À FAPESP, pelo suporte à pesquisa.Ao Prof. Dr. Marcus Antonio Zanetti, pela competência, orientação e apoio ao projeto. Atualmente, a maioria das pesquisas com BCAD estão direcionadas à bovinocultura de leite, porém, sendo concentradas principalmente na área de prevenção de certas desordens metabólicas, como por exemplo, a hipocalcemia no período do pré-parto, a febre do leite, também conhecida como febre vitular ou ainda paresia puerperal, no pós-parto. Nesse caso, as dietas oferecidas aos animais são as aniônicas, ou seja, aquelas dietas com maior proporção de ânions, pois têm a capacidade de produzir leve acidose metabólica, levando conseqüentemente à reabsorção de cálcio dos ossos.Para se obter melhor desempenho de vacas em lactação, recomenda-se o uso de dietas altamente catiônicas, com inclusão de fontes de sódio ou potássio, já que esses ruminantes apresentam altas taxas metabólicas e há tendência para o ambiente celular tornar-se ácido.Um dos grandes problemas que se enfrenta hoje é a escassez de pesquisas envolvendo especificamente o desempenho animal e, portanto, não há recomendações de níveis ótimos de BCAD na nutrição de ruminantes, em especial de vacas em lactação, principalmente nas condições de clima tropical, onde o estresse provocado pelo calor é mais acentuado. Porém, esse assunto tem despertado bastante interesse pois, ganho de peso e produção de leite podem ser os primeiros parâmetros a serem afetados em caso de ocorrência de desbalanço cátion-aniônico. 2O objetivo desse trabalho foi estudar os efeitos de diferentes níveis de dieta catiônica (+150, +250, +400, +500mEq/kg de MS), através da inclusão de bicarbonato de sódio, em vacas após o pico de lactação, sobre a ingestão de matéria seca, produção, composição e parâmetros físico-químicos do leite, temperatura corporal, pH urinário e parâmetros ácido-base no sangue.

show abstract

Effect of Varying Dietary Ratio of Sodium and Chloride on the Responses of Lactating Dairy Cows in Hot Weather

Cited by 14 publications

References 18 publications

Synthetic, Reactivity, and Structural Studies on Half‐Sandwich (η⁵‐C₅Me₅)Be and Related Compounds: Halide, Alkyl, and Iminoacyl Derivatives

Synthetic, Reactivity, and Structural Studies on Half‐Sandwich (η⁵‐C₅Me₅)Be and Related Compounds: Halide, Alkyl, and Iminoacyl Derivatives

Sodium and protein nutrition of lactating cows under tropical conditions

Dietas catiônicas no desempenho e parâmetros ácido-base de vacas em lactação

Contact Info

Product

Resources

About

Effect of Varying Dietary Ratio of Sodium and Chloride on the Responses of Lactating Dairy Cows in Hot Weather

Cited by 14 publications

References 18 publications

Synthetic, Reactivity, and Structural Studies on Half‐Sandwich (η5‐C5Me5)Be and Related Compounds: Halide, Alkyl, and Iminoacyl Derivatives

Synthetic, Reactivity, and Structural Studies on Half‐Sandwich (η5‐C5Me5)Be and Related Compounds: Halide, Alkyl, and Iminoacyl Derivatives

Sodium and protein nutrition of lactating cows under tropical conditions

Dietas catiônicas no desempenho e parâmetros ácido-base de vacas em lactação

Contact Info

Product

Resources

About

Synthetic, Reactivity, and Structural Studies on Half‐Sandwich (η⁵‐C₅Me₅)Be and Related Compounds: Halide, Alkyl, and Iminoacyl Derivatives

Synthetic, Reactivity, and Structural Studies on Half‐Sandwich (η⁵‐C₅Me₅)Be and Related Compounds: Halide, Alkyl, and Iminoacyl Derivatives