Variation in Riboflavin Excretion

Excreção de creatinina no período de vinte e quatro horas, em crianças de cinco a onze anos de idade

“…Recomendam investigação em amostras maiores, colhendo-se a urina de indivíduos em jejum ou entre o café da manhã e o almoço. HEGESTED e col. 7 (1959) em amostras colhidas de 2 em 2 horas, encontraram desvio padrão muito grande no estudo de quatro casos. POWEL et al 13 (1961) analisando a ciclagem do nitrogênio e da creatinina encontraram variação semelhante entre ambos, o que tornou viável o uso da razão nitrogênio total/creatinina.…”

Food preference in domestic pets

“…Some of the technical and interpretive problems of preference trials have been well described for cats by Hegstcd, Gershoff & Lentini (1956), and for dogs by Waterhouse & Fritsch ( I 967). The methods that they used consisted essentially of providing the animal with a choice of two foods, each one of which was equivalent to I day's intake.…”

“…Like others (Hegsted et al 1956;Waterhouse & Fritsch, 1967), we have encountered a number of variable factors in carrying out preference experiments.…”

“…I n a preference panel of IOO dogs, Waterhouse & Fritsch (1967) found that five animals showed a consistent bias to one side, whereas Hegsted et al (1956) concluded that their preference tests on cats were not affected by animal bias to one side or the other.…”