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| Registros recuperados: 218 | |
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| Brieger,F. G.. |
| The main object of the present paper consists in giving formulas and methods which enable us to determine the minimum number of repetitions or of individuals necessary to garantee some extent the success of an experiment. The theoretical basis of all processes consists essentially in the following. Knowing the frequency of the desired p and of the non desired ovents q we may calculate the frequency of all possi- ble combinations, to be expected in n repetitions, by expanding the binomium (p-+q)n. Determining which of these combinations we want to avoid we calculate their total frequency, selecting the value of the exponent n of the binomium in such a way that this total frequency is equal or smaller than the accepted limit of precision n/pª{ 1/n1 (q/p)n +... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1947 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761947000100012 |
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| Jardim,W. R.; Trivelin,A. P.. |
| A test was conducted at Poultry Department of "Luiz de Queiroz" School of Agriculture to prove the effect of green feed on egg production. One hundred Rhode Island Red hens at plain laying period were divided in ten pens. The lot A was constituted of pens 1 to 5 and the lot B of pens 6 to 10. During 16 days the pens 1 to 5 did not receive green feed and the pens 6 to 10 received it with abundance. After and for a period of 30 days the situation was inverted. The analysis were made considering, a) the production of all chickens and b) discarding the chickens with irregular laying. In both cases the results were statistically insignificant, proving that green feed did not improve egg production. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1947 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761947000100028 |
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| Graner,E. A.. |
| The effect of different feeds in comparison with that of maize grains on the egg yolk color was observed. It was found that deep orange and yellow orange maize give satisfactory coloration to the yolk, respectively orange and yellow. The most intense color was observed when green feed was used in combination with deep orange maize. Green feeds as chicory, alfafa, cabbage, welsh onion and banana leaves and alfafa or chicory meal proved to be good in giving orange color to the yolk. Yellow yolk was obtained when Guinea grass or carica fruit were used in the ration. Carrot and beet without leaves did not give satisfactory color to the egg yolk. The observations with other feeds are being continued. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1947 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761947000100021 |
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| Bemmel, A.C.V. van. |
| In preparing a Handlist of the birds of the Moluccan islands, I found among the material in the Rijksmuseum van Natuurlijke Historie, Leiden, a race of Dicrurus that needs description: Dicrurus bracteatus morotaiensis nov. subspec. Diagnosis: Distinguished from atrocaeruleus Gray (1860) — Batjan and Halmahera — by smaller culmen and wing. Habitat: Island Morotai (N. Moluccas). Measurements in mm: ♂♂ culmen: 29; 29; 28.5; 28.5; 30 wing: 150; 148; 147; 152; 149 ♀♀ culmen: 27; 29; 30 wing: 149; 147; 145. For comparison the following measurements are given: Halmahera: ♂♂ culmen: 32; 32; 32; 31; 33; 33; 32; 32 wing: 162; 161; 175; 169; 166; 169; 168; 168 ♀♀ culmen: 32; 34; 33; 31; 31 wing: 160; 165; 168; 162; 162 sex inc. culmen: 32; 32; 31; 33 wing: 159; 167;... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.83. |
| Ano: 1947 |
URL: http://www.repository.naturalis.nl/record/318240 |
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| Lam, H.J.. |
| Some time ago I proposed elsewhere (1) a new system of the Cormophyta. Since the periodical, whose hospitality was my privilege, may not reach many taxonomists who still may be expected to be interested in the proposal, I deem it justified to briefly review the results at which I arrived in the present journal; and this will give me an opportunity to explain one or two points of a nomenclatural nature which, it seems to me, were perhaps somewhat insufficiently elucidated in the paper quoted. As a matter of course, for details as well as for the full argumentation of my views I have to refer to that publication. |
| Tipo: Article / Letter to the editor |
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| Ano: 1947 |
URL: http://www.repository.naturalis.nl/record/525667 |
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| Bergamin,Armando. |
| A experiência foi realizada com o propósito de encontrar um tratamento eficaz e de fácil aplicação na cura da sarna das orelhas do coelho doméstco. Foram tomados 5 lotes de 3 coelhos e tratados com Detefon, Insect-o-Blitz, Terebentina e óleo, D. D. T. a 10% e vaselina e Querozene. Foram feitas 4 aplicações com intervalos de 4 dias. Chegámos à conclusão de que o melhor tratamento foi o D. D. T. a 10% e vaselina que produziu os melhores resultados e que pode, por isso, ser indicado. A terebentina e óleo também pode ser indicada como eficiente. Quanto aos outros tratamentos é possível que produzam efeitos satisfatórios fazendo-se uma diluição conveniente, afim de atenuar a ação causticante dos ingredientes. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1947 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761947000100023 |
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| Medina,J. C.; Correia,F. A.. |
| In this paper it is presented a detailed fiber analysis of leaves of twenty mature sisal plants taken from four positions on the plant: 1) first developped leaves (75°); 2) leaves usually cut for fiber extraction (50°) ; 3) leaves adjacent to the central bud (25°) ; and 4) young leaves not yet unfolded from the central bud (0°). The results herein reported are against the prevailing opinion that the sisal leaf only matures after it has unfolded from the central bud. Neither the physical nor the chemical fiber characteristics were adversely affected even if cutting was carried out up to the very young leaves. This practice, however, cannot yet be advised, as it desirability also depends on the effects of the severe cutting upon the subsequent rate of growth... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1947 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051947000800001 |
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| Bruijning, C.F.A.. |
| The Blattid fauna of Celebes, the Moluccas, and New Guinea, a region which from a zoogeographical point of view forms an important area of transition, is still insufficiently known. Moreover the literature on the Blattids of this region is scattered in various papers which made it desirable to give a general survey of the hitherto known species of the group from Celebes, the Moluccas, and New Guinea. The present paper deals with the material of Blattidae from the region mentioned above contained in the Leiden and in the Amsterdam museums. I am indebted to Prof. Dr. H. Boschma and Dr. H. C. Blöte of the Rijksmuseum van Natuurlijke Historie at Leiden, and to Prof. Dr. L. F. de Beaufort and Mr. J. B. Corporaal of the Zoological Museum at Amsterdam for placing... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.75. |
| Ano: 1947 |
URL: http://www.repository.naturalis.nl/record/318354 |
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| Graner,E.A.; Trivelin,A. P.. |
| Size and shape in eggs of Rhode Island Red and Light Sussex breeds and in the hibrid Rhode x Sussex were studied. These characters are influenced by quantitative genes. Major and minor diameter were used for estimating size of the eggs and the ratio minor/major diameter for shape indice. It was found, in the material analyzed, that: a) the eggs laid by the sa- me chick are pratically uniform; b) the correlation coeficient between major and minor diameter is weak; c) Rhode Island Red has short eggs than Light Sussex; d) short eggs is dominant on long eggs; e) egg shape is the same in Rhode Island Red and Light Sussex breeds and different in the hibrid, which has rounder eggs than the breeds. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1947 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761947000100024 |
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| NN. |
| Blake, S.T.: The Cyperaceae collected in New Guinea by L.J. Brass II (Journ. Arn. Arbor. 28 (1947) 207-229, 1 fig. 2 pl.). Deals with the genera Hypolytrum, Thoracostachyum, Paramapania, Mapania, Lepironia, Cyperus, Eleocharis, Bulbostylis, Fuirena, Lipocarpha. Two new species of Cyperus, 1 of Mapania and 1 of Paramapania are described. Bremekamp, C.E.B.: A monograph of the genus Acranthera Arn. ex Meisn. (Rub.) (Journ. Arnold Arb. 28 (1947) 261-308). The genus is known from Ceylon and SE Asia to W Malaysia. It is subdivided into 9 subgenera; 35 spp. are recognized of which 14 are new to science. Psilobium Jack and Gonyanera Korth. are reduced. |
| Tipo: Article / Letter to the editor |
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| Ano: 1947 |
URL: http://www.repository.naturalis.nl/record/533361 |
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| Registros recuperados: 218 | |
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