Digestibilidad de raciones altas en fibra por el cerdo criollo

Se elaboraron raciones isocalóricas e Isoproteicas utilizando una premezcla que contenía 35% harina torta de soya, 64.6% maíz y 0.4% metionina, para las etapas de iniciación crecimiento y desarrollo de cerdos criollos, correspondientes a 8, l6 y 26 semanas de edad, que contenían 16,12y 10% de proteína, respectivamente. El contenido de material fibroso a evaluarse, Lathyrus, fue de 16.4 y 32.8% para las tres etapas, sustituyendo su aporte proteico por el de la premezcla, e incrementando almidón. Se presenta información sobre digestibilidad de distintos nutrientes en dietas a base de Lathyrus para cerdos de distintas edades, así corno, resultados obtenidos con cerdos de 8 semanas utilizando Ipomoea. La digestibilidad del contenido celular, aunque disminuyó con el incremento de fibra, mejoró a las 26 semanas de edad. La digestibilidad de la fibra ácido detergente, lignina y energía mejoró con la edad; sin embargo, entre dietas fue a la Inversa. La digestibilidad de celulosa presentó diferencias estadísticas entre dietas. La digestibilidad de la proteína presenta disminución con respecto al contenido de fibra; sin embargo, no muestra diferencias significativas entre dietas ni entre edad de los animales. Los valores de digestibilidad entre Lathyrus e Ipomoea muestran diferencias significativas en las variables fibra ácido detergente, lignina y celulosa en favor de Ipomoea

Coffee pulp : composition, technology, and utilization

Spanish version available in IDRC Digital Library: Pulpa de café : composición, tecnología y utilizaciónCompilation on the use of coffee pulp as animal feed, particularly in Central America - discusses coffee plant production, food composition of coffee by-products; agri product processing, ensiling , and drying; antiphysiological factors, such as caffeine and acids, and their impact on animal nutrition and animal production. Bibliography, statistical data

Pulpa de café : composición, tecnología y utilización

Copy from microficheVersión en inglés disponible en la Biblioteca Digital del IDRC: Coffee pulp : composition, technology, and utilizatio

A Slope Instability Case History Involving Swelling Clay in Southern Brazil

This paper describes a slope instability case history involving swelling clay. A 9-m high slope was cut in 3 sedimentary layers during the construction of a single-carriage road. A complex slope failure mechanism was identified during site investigation, consisting of: (a) a progressive surficial degradation, particularly of the lower swelling clay layer. (b) a deep-seated slope failure, and (c) the toppling failure of the upper stronger layers. Site investigation included SPT testing, undisturbed sampling and in situ suction measurement. Laboratory testing consisted of: (a) soil characterization by X-ray diffraction analysis, particle-size analysis and Atterberg limits tests; (b) evaluation of effective shear strength parameters using direct shear tests and ring shear tests: and (c) determination of soil-water characteristic curves. Slope stability analyses were carried out followed by comparison with observed field performance

Digestão de óleo lubrificante encapsulado em forno de microondas com radiação focalizada por adição de amostra ao reagente pré-aquecido.

FOCUSED-MICROWAVE-ASSISTED DIGESTION OF ENCAPSULATED LUBRICATING OILS: GRADUAL SAMPLEADDITION TO PRE-HEATED ACID. The applicability of the recently proposed procedure based on gradual sample addition tomicrowave-assisted pre-heated concentrated acid is limited by the sample viscosity. In this work, lubricating oil samples with high viscositywere encapsulated and manually added to the microwave-assisted pre-heated concentrated digestion mixture. The procedure was appliedfor determination of Al, Ca, Cr, Cu, Fe, Mg, Ni, P, Pb, Si, Sn, Sr, V, W, and Zn in lubricating oil by inductively coupled plasma opticalemission spectrometry (ICP OES). Determined and certified values for Ca, Mg, P, and Zn in lubricating oil were in agreement at a 95% confidence level

Hypernuclear spectroscopy with K−^- at rest on 7^7Li, 9^9Be, 13^{13}C and 16^{16}O

The FINUDA experiment collected data to study the production of hypernuclei on different nuclear targets. The hypernucleus formation occurred through the strangeness-exchange reaction K^-_{stop} + \; ^AZ \rightarrow \; ^A_{\Lambda}Z + \pi^-. From the analysis of the momentum of the emerging $\pi^-$, binding energies and formation probabilities of $^7_{\Lambda}$Li, $^9_{\Lambda}$Be, $^{13}_{\Lambda}$C and $^{16}_{\Lambda}$O have been measured and are here presented. The behavior of the formation probability as a function of the atomic mass number A is also discussed.Comment: Accepted for publication in PL

New detectors for the kaon and hypernuclear experiments with KaoS at MAMI and with PANDA at GSI

The KaoS spectrometer at the Mainz Microtron MAMI, Germany, is perceived as the ideal candidate for a dedicated spectrometer in kaon and hypernuclei electroproduction. KaoS will be equipped with new read-out electronics, a completely new focal plane detector package consisting of scintillating fibres, and a new trigger system. First prototypes of the fibre detectors and the associated new front-end electronics are shown in this contribution. The Mainz hypernuclei research program will complement the hypernuclear experiments at the planned FAIR facility at GSI, Germany. At the proposed antiproton storage ring the spectroscopy of double Lambda hypernuclei is one of the four main topics which will be addressed by the PANDA Collaboration. The experiments require the operation of high purity germanium (HPGe) detectors in high magnetic fields (B= 1T) in the presence of a large hadronic background. The performance of high resolution Ge detectors in such an environment has been investigated.Comment: Presentation at International Symposium on the Development of Detectors for Particle, Astroparticle and Synchrotron Radiation Experiments, Stanford, Ca (SNIC06), 6 pages, LaTeX, 11 eps figure

First determination of the one-proton induced Non-Mesonic Weak Decay width of p-shell {\Lambda}-Hypernuclei

Previous studies of proton and neutron spectra from Non-Mesonic Weak Decay of eight Lambda-Hypernuclei (A = 5-16) have been revisited. New values of the ratio of the two-nucleon and the one-proton induced decay widths, Gamma_2N/Gamma_p, are obtained from single proton spectra, Gamma_2N/Gamma_p = 0.50 +/- 0.24, and from neutron and proton coincidence spectra, Gamma_2N/Gamma_p = 0.36 +/- 0.14stat +0.05sys -0.04sys , in full agreement with previously published ones. With these values, a method is developed to extract the one-proton induced decay width in units of the free Lambda decay width, Gamma_p/Gamma_Lambda, without resorting to Intra Nuclear Cascade models but by exploiting only experimental data, under the assumption of a linear dependence on A of the Final State Interaction contribution. This is the first systematic determination ever done and it agrees within the errors with recent theoretical calculations.Comment: 16 pages, 3 figures, 2 table