186 research outputs found
Evaluation of nutrition education in Africa: community research in Uganda, 1971-1972
Nutrition education is widely accepted as an important means of improving the health of young children in developing countries. Based on research carried out in Uganda in 1971-1972, this book shows how studies of changes in knowledge and attitudes can provide unique insights into both the educational process and its success or failure. It also demonstrates that the social circumstances of the individual families play an important part in determining the effects of the teaching. It contributes to the information needed for planning nutrition programmes so as better to meet the actual needs of individual families of groupsASC â Publicaties niet-programma gebonde
Analysis of the complement sensitivity of oral treponemes and the potential influence of FH binding, FH cleavage and dentilisin activity on the pathogenesis of periodontal disease
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/108655/1/omi12054.pd
InterrelaçÔes entre minerais no solo, plantas forrageiras e tecido animal no norte de Mato Grosso 4. Zinco, magnésio, sódio e potåssio
An experiment was conducted with samples from six farms in northearn Mato Grosso, Brazil, to study the interrelationships among levels of minerals in soil, forage, and animal tissues during the wet and dry seasons of the year. Soil extractable Zn levels were low in three out of six farms. Forage Zn levels were defficient in five farms. Levels of Zn in the liver were defficient in all six farms, being much lower (68 ppm) during the wet season than during the dry season (113 ppm). Magnesium levels in soil were low in one farm and adequated in five. Forage and animal tissue Mg levels were adequated in all six farms. Soil extractable sodium was normal and the salinity in all six farms was considered negligible. Forage sodium was highly defficient, being able to meet only between 14 to 30% of the animal requirements. Soil potassium levels were low in two out of six farms, but forage levels were adequate in all six farms to meet the requirement of grazing beef cattle.Levantamento das deficiĂȘncias minerais de seis fazendas localizadas ao norte do Estado de Mato Grosso, tendo sido amostrados os solos, plantas forrageiras e tecido animal, nas estaçÔes seca e chuvosa. Foram constatadas deficiĂȘncias de Zn no solo em trĂȘs das seis fazendas estudadas. Cinco das seis fazendas apresentaram deficiĂȘncia de zinco nas forrageiras. Os nĂveis de Zn no fĂgado dos animais foram deficientes em todas as seis fazendas, mas sendo muito mais deficientes ainda no perĂodo chuvoso (68 ppm) do que no perĂodo seco, (113 ppm). Os nĂveis de Mg nos solos foram mais baixos em apenas uma fazenda. Nas forrageiras e no tecido dos animais amostrados, os nĂveis de Mg foram normais. Os nĂveis de Na nos solos foram considerados normais, e a salinidade nas regiĂ”es estudadas foi considerada insignificante. Em todas as fazendas, as forrageiras mostraram-se altamente deficientes em Na, satisfazendo apenas entre 14 a 30% das exigĂȘncias nutricionais dos bovinos. Os nĂveis de K nos solos mostraram-se deficientes em duas das seis fazendas estudadas. As forrageiras apresentaram nĂveis mĂ©dios adequados Ă s exigĂȘncias nutricionais dos bovinos em todas as fazendas
The emergence of a new source of X-rays from the binary neutron star merger GW170817
The binary neutron-star (BNS) merger GW170817 is the first celestial object
from which both gravitational waves (GWs) and light have been detected enabling
critical insight on the pre-merger (GWs) and post-merger (light) physical
properties of these phenomena. For the first years after the merger
the detected radio and X-ray radiation has been dominated by emission from a
structured relativistic jet initially pointing degrees away from
our line of sight and propagating into a low-density medium. Here we report on
observational evidence for the emergence of a new X-ray emission component at
days after the merger. The new component has luminosity at 1234 days, and represents a - excess compared to the expectations from the off-axis
jet model that best fits the multi-wavelength afterglow of GW170817 at earlier
times. A lack of detectable radio emission at 3 GHz around the same time
suggests a harder broadband spectrum than the jet afterglow. These properties
are consistent with synchrotron emission from a mildly relativistic shock
generated by the expanding merger ejecta, i.e. a kilonova afterglow. In this
context our simulations show that the X-ray excess supports the presence of a
high-velocity tail in the merger ejecta, and argues against the prompt collapse
of the merger remnant into a black hole. However, radiation from accretion
processes on the compact-object remnant represents a viable alternative to the
kilonova afterglow. Neither a kilonova afterglow nor accretion-powered emission
have been observed before.Comment: 66 pages, 12 figures, Submitte
Spectroscopic quantification of soil phosphorus forms by 31p-nmr after nine years of organic or mineral fertilization
SILAGENS DE GIRASSOL (Helianthus annus L.), MILHO (Zea mays L.) E SORGO (Sorghum bicolor (L.) Moench) PARA OVELHAS EM CONFINAMENTO
Animal-based agriculture, phosphorus management and water quality in Brazil: options for the future
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