|
|
|
| Registros recuperados: 91 | |
|
|
| Brieger,F. G.. |
| 1) The first part deals with the different processes which may complicate Mendelian segregation and which may be classified into three groups, according to BRIEGER (1937b) : a) Instability of genes, b) Abnormal segregation due to distur- bances during the meiotic divisions, c) obscured segregation, after a perfectly normal meiosis, caused by elimination or during the gonophase (gametophyte in higher plants), or during zygophase (sporophyte). Without entering into detail, it is emphasized that all the above mentioned complications in the segregation of some genes may be caused by the action of other genes. Thus in maize, the instability of the Al factor is observed only when the gene dt is presente in the homozygous conditions (RHOADES 1938). In another... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100009 |
| |
|
|
| Sampaio,S. C.. |
| Analisando-se o que vimos de expor, para as condições experimentadas, verifica-se o seguinte : 1. Os diversos elementos fertilizantes comumente aplicados às culturas cana vieiras exerceram alguma influência sôbre a rigueza e a pureza do caldo. 2. Os adubos nitrogenados, em geral, deprimiram o teor em sacarose do caldo, assim como prejudicaram a sua pureza, e isto se dá tanto nas terras coloridas como nas arenosas, claras. 3. Os fertilizantes potássicos, em conjunto, favoreceram a formação do açúcar no caldo, não se notando o mesmo efeito nítido na melhoria da pureza do mesmo. Nas terras roxas ou falsa-roxas a sua ação favorável foi acentuada tanto para o enriguecimento do caldo como para melhorar a pureza dêste ; mas, nas terras arenosas, claras, as cousas... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051945000500001 |
| |
|
|
| Hooijer, D.A.. |
| In 1944 Miss Dr. A. Schreuder sent me for identification a fossil horncore, which according to the accompanying letter came from a well-boring near Grubbenvorst (province of Limburg). It was found in a coarse sandy layer with gravel at a depth of 61.50 m below the surface; the topographic height of the latter is given as 24.53 m + N.A.P. (N.A.P. = sea-level at Amsterdam). Dr. J. F. Steenhuis, geologist to the Government Geological Foundation, informed me that deep borings for the water-supply of Central-Limburg have been made in the years 1918, 1919, and 1922 S. and S.E. of Grubbenvorst. Evidently we have to do with boring no. I of October 1918, which reached a depth of 83 m, the top being at 24.50 m + N.A.P. (Geological Foundation Index no. 695/4). The... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.84. |
| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/318430 |
| |
|
|
| Doesburg, P.H. van. |
| Aulacocyclus laevipennis nov. spec. Description. Lamellae of antennae rather short and stout. Labrum about twice as broad as long, with long, dark red hairs, strongly and closely punctured, anterior margin concave, angles rounded, sides slightly convergent behind. No groove between clypeus and frons. Central tubercle very robust, somewhat square in section, seen from the side its basal vertical part as broad as the whole hind half of the head, strongly elevated and regularly bent forward, excavated in front, seen from behind the base is a little narrower than the apex, the latter a little excavated. Surface of head and basal sides of central tubercle with coarse, hair-bearing punctures. Supra-orbital ridges straight, parallel, somewhat thickened in front.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.75. |
| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/318369 |
| |
|
| |
|
|
| Ooststroom, S.J. van. |
| Frutex scandens. Caules in statu florigero foliis destituti, internodiis longis, usque ad 18 cm metientibus, in nodis ramulos laterales breves vel apicem versus inflorescentias emittentes. Ramuli laterales folia nonnulla vel inflorescentias gerentes, internodiis multo brevioribus vel brevissimis. Caules teretes vel juniores obscure angulati, griseo-brunnei, in sicco longitudinaliter hinc inde transversaliter rugosi, juniores pilis brevibus adpressis praediti, adultiores glabri, plusminusve verrucosi (lenticellati). Folia petiolata ; petiolo breviter et adpresse piloso ut in partibus junioribus caulis, supra sulcato, ad 6 cm longo; lamina ovato-oblonga, apice breviter acuminata, basi ± rotundata (vel in foliis junioribus late cuneata), nervis exceptis... |
| Tipo: Article / Letter to the editor |
|
| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/525857 |
| |
|
| |
|
|
| Boock,Olavo José. |
| 1 - As experiências relatadas no presente trabalho se referem ao emprêgo de diferentes adubos fosfatados na cultura da batata (S. tuberosum L.) e conduzidas em Campinas, Taubaté e Joanópolis, em 1940 e 1944. 2 - As análises sumárias das terras indicaram variações do fósforo, desde muito fraco (Joanópolis), regular (Campinas) até ótimo (Taubaté) . 3 - As menores produções foram obtidas dos canteiros sem adubo. 4 - O emprêgo ùnicamente de adubos azotados mais potássicos, pràticamente, não determinou aumento de produção sôbre os "sem adubo". 5 - O acréscimo de adubos fosfatados aos azotados e potássicos causou um aumento altamente significativo de produção. 6 - Os canteiros em que além dos adubos azotados e potássicos, incluímos o Superfosfato apresentaram em... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051945000500004 |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Gurgel,J. T. A.. |
| The general properties of POISSON distributions and their relations to the binomial distribuitions are discussed. Two methods of statistical analysis are dealt with in detail: X2-test. In order to carry out the X2-test, the mean frequency and the theoretical frequencies for all classes are calculated. Than the observed and the calculated frequencies are compared, using the well nown formula: f(obs) - f(esp) 2; i(esp). When the expected frequencies are small, one must not forget that the value of X2 may only be calculated, if the expected frequencies are biger than 5. If smaller values should occur, the frequencies of neighboroughing classes must ge pooled. As a second test reintroduced by BRIEGER, consists in comparing the observed and expected error... |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100010 |
| |
| Registros recuperados: 91 | |
|
|
|
