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| Registros recuperados: 91 | |
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| Brieger,F. G.. |
| 1) Chamamos um desvio relativo simples o quociente de um desvio, isto é, de uma diferença entre uma variável e sua média ou outro valor ideal, e o seu erro standard. D= v-v/ δ ou D = v-v2/δ Num desvio composto nós reunimos vários desvios de acordo com a equação: D = + Σ (v - 2)²: o o = o1/ o o Todo desvio relativo é caracterizado por dois graus de liberdade (número de variáveis livres) que indicam de quantas observações foi calculado o numerador (grau de liberdade nf1 ou simplesmente n2) e o denominador (grau de liberdade nf2 ou simplesmente n2). 2) Explicamos em detalhe que a chamada distribuição normal ou de OAUSS é apenas um caso especial que nós encontramos quando o erro standard do dividendo do desvio relativo é calculado de um número bem grande de... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100011 |
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| Blöte, H.C.. |
| The collection of Berytidae, Piesmidae, and Tingidae in the Rijksmuseum van Natuurlijke Historie is not of the same degree of completeness as that of most of the other families of bugs. Exotic insects of small size have often been neglected by our collectors, and it seems, moreover, that the Tingidae are not very abundant in the tropical regions. Because of lack of material for comparison I have abandoned the description of the few American and African species that are possibly new to science. Only the descriptions of new species from the Indian Archipelago are given below. BERYTIDAE — BERYTINAE Neides aduncus Fieb. I. Southern France, Duda. — 2. Rio Salato, Oran, 1895, Dr. Schmiedeknecht. — 3. Corfu, 1889, Schmiedeknecht. — 4. Tunis, 1898, Dr.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.75. |
| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/317943 |
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| Blöte, H.C.. |
| TESSARATOMINAE ONCOMERINI Rhoecocoris sulciventris Stål. 1. Australia, Felder. Cumare nov. gen. Allied to Rhoecocoris Bergroth, the base of the venter with a blunt, depressed tubercle only, not spinous; the antennae fivejointed. Head flat above, eyes not very prominent. Antennae short, the first joint not reaching the apex of the head. Rostrum short, not reaching beyond the middle of the mesosternum. Orifices narrow, ending into an elevated thorn. Mesosternum anteriorly and posteriorly with elevated longitudinal keels, the medial line before the posterior keel narrowly furrowed. Type of the genus is: Cumare pallida nov. spec. (fig. 1). Pale greyish ochraceous throughout, only at both sides of the centre of the apical border of the sixth (seventh) ventral... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.75. |
| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/318719 |
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| Pfeiffer, J.Ph.; Varossieau, W.W.. |
| 1. The literature gives various methods to compile a universal scheme for the classification and identification of wood species. To attain this object a new method is now given possessing various advantages over the methods that have been used so far. 2. The wood structure is subsequently described using decimal indices. Each of five sections of features are divided into four groups, and these again in subgroups, which have been worked out by means of indices. In the treatment of various features literature data are discussed. The classification of wood species aims at obtaining a grouping which, as far as possible, links up with the botanical groupings according to natural systems. 3. On the grounds given in the introduction and the discussion, the... |
| Tipo: Article / Letter to the editor |
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| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/526100 |
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| Brieger,F. G.. |
| The experiments reported were started as early as 1933, when indications were found in class material that the factor for small pollen, spl, causes not only differences in the size of pollen grains and in the growth of pollen tubes, but also a competition between megaspores, as first observed by RENNER (1921) in Oenothera. Dr. P. C. MANGELSDORF, who had kindly furnished the original seeds, was informed and the final publication delayed untill his publication in 1940. A further delay was caused by other circunstances. The main reason for the differences of the results obtained by SINGLETON and MANGELSDORF (1940) and those reported here, seems to be the way the material was analysed. I applied methods of a detailed statistical analysis, while MANGELSDORF and... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100008 |
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| Smith, J.J.. |
| Neuwiedia (sect. Euneuwiedia) Griffithii Rehb.f. Xenia Orch. II (1874), 215; Rolfe in Journ. Linn. Soc. XXV (1890), 235, 241, t. XLVIII, fig. 2—9; in Orch. Rev. II (1894), 276; IV (1896), 329; Hook. f. Fl. Br. Ind. VI (1890), 176; in Bot. Mag. CXXI (1895), t. 7425; Krzl. Orch. I (1897), 4; Pfitz. in Pflanzenr. IV. 50 (1903), 5; Ridl. in Journ. Linn. Soc. XXXII (1896), 416; Mat. Fl. Mal. Penins. I (1907), 231; Fl. Mal. Penins. IV (1924), 296. Planta in genere parva. Caulis erectus, rigidus, teres, dilute viridis, c. 14 cm longus, 0.63 cm diam., c. 10-folius. Folia erecto-patentia, recurva, lanceolata, sensim longe et acutissime acuminata, basi acuta sensim in petioluin contracta, plicaita, nervis c. 7 subtus prominentibus, nervis tenuioribus alternantibus,... |
| Tipo: Article / Letter to the editor |
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| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/525348 |
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| Piza Jor.,S. de Toledo. |
| In the present paper the behavior of the heterochromoso-mes in the course of the meiotic divisions of the spermatocytes in 15 species of Orthoptera belonging to 6 different families was studied. The species treated and their respective chromosome numbers were: Phaneropteridae: Anaulacomera sp. - 1 - 2n = 30 + X, n +15+ X and 15. Anaulacomera sp. - 2 - 2n - 30 + X, n = 15+ X and 15. Stilpnochlora marginella - 2n = 30 + X, n = 15= X and 15. Scudderia sp. - 2n = 30 + X, n = 15+ X and 15. Posldippus citrifolius - 2n = 24 + X, n = 12+X and 12. Acrididae: Osmilia violacea - 2n = 22+X, n = 11 + X and 11. Tropinotus discoideus - 2n = 22+ X, n = 11 + X and 11. Leptysma dorsalis - 2n = 22 + X, n = 11-J-X and 11. Orphulella punctata - 2n = 22-f X, n = 11 + X and 11.... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100006 |
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| Lam, H.J.. |
| The following notes are mainly based upon a small but interesting collection of plants, made in 1937—1939 by Mr C. Monod de Froideville, Civil Service Officer in the Netherlands Indies, during his extensive trips in the southern and central parts of the island of Celebes. His hobby was the study of Leguminosae and about half of his collection consists of representatives of that natural order. For several reasons, however, they have been left out of the present paper, for one thing since Mr Monod is intending to deal with them later on himself, a task, which circumstances unfortunately prevent him from accomplishing at present; and secondly since they promise geographically less important results than most other families, many of them being anthropochorous.... |
| Tipo: Article / Letter to the editor |
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| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/525333 |
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| Deinse, A.B. van. |
| Bij de beschrijving en (of) de determinatie van Cetacea speelt de staart geen belangrijke rol. Toch is er een vertegenwoordiger dier orde te noemen, waarbij de staart er zoo karakteristiek uitziet, dat hierdoor alleen reeds geslacht en soort volkomen zijn bepaald. Ik bedoel Megaptera novaeangliae (M. nodosa, M. longimana, M. boops), de Humpback whale der Engelschen. De achterrand van de staartvin van dit dier is van een soort franje voorzien en dit kenmerk heeft géén andere cetacee. E. Mohr, Hamburg (1931, blz. 125, pl. 73) beeldde een foto af van een in Duitschland geschilderde Megaptera uit 1766, gemaakt naar een gestrand individu, waar de staartfranje reeds duidelijk is weergegeven. In 1889 behandelde J. Struthers uitvoerig de anatomie van de Humpback... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.84. |
| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/318142 |
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| Deinse, A.B. van; Junge, G.C.A.. |
| In 1936 ontving het Rijksmuseum van Natuurlijke Historie door bemiddeling van Dr. L. D. Brongersma een drietal wervels van een dolfijnachtige, afkomstig uit een jeugdcollectie van J. IJzerdraat. Helaas waren de gegevens, die wij, dank zij Dr. Brongersma, over de herkomst van deze wervels konden achterhalen, vaag. De wervels waren ± 1919 gevonden aan het strand tusschen Zandvoort en IJmuiden. Het is jammer, dat er niet meer gegevens zijn, daar door vergelijking bleek, dat we te doen hebben met den tweeden halswervel (draaier), eersten borstwervel en een (waarschijnlijk tweeden) lendenwervel van een Witten Dolfijn, een soort, die tot nu toe niet in ons land was geconstateerd. Het exemplaar was waarschijnlijk nog niet geheel volwassen, daar de epiphysen van... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.84. |
| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/318200 |
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| Coury,Tufi; Ranzani,Guido. |
| The authors studied the action of arsenic, in the form of lead arsenate and sodium arsenite, on cotton in white sandy soil of Piracicaba, State of S. Paulo, Brazil. The experiment was carried out in Mitscherlich pots, applying increasing quantities of the above mentioned compounds. The following conclusions were reached: sodium arsenite is more toxic than lead arsenate. 48 pounds per acre of lead arsenate and 16 pounds per acre of sodium arsenite reduced the vegetative development and the production of cotton. The roots were more seriously affected than the aerial parts. Sandy soils were sensitive to arsenic toxicity. The arsenic mobilization in the soil seems to depend upon factors such as, the a- cidity, the concentration of Fe2O3, CaO, P2O5 and soil... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100012 |
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| Cutler,H. C.. |
| A morfologia, ocorrência, utilidade e genética das flores funcionais inferiores em espiguetas de milho, são examinadas ligeiramente. Em regra, somente a flor superior em cada espigueta numa espiga de milho se desenvolve e contém um grão, porém nos exemplos em foco a flor inferior se desenvolve tão bem como a superior. O embrião no milho geralmente se acha voltado na mesma direção que a ponta da espiga, ao passo que o embrião do grão proveniente da flor inferior se volta na direção da base. São raras, não só na América do Norte e Central, como na maior parte da América do Sul, as espigas nas quais os grãos provêm da flor inferior das espiguetas, constituindo uma exceção o milho doce Country Gentleman, no qual se encontram grãos em ambas as flores na maioria... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100013 |
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| Piza Junior,S.de Toledo. |
| A more or less detailed study of the spermatogenesis in six species of Hemiptera belonging to the Coreid Family is made in the present paper. The species studied and their respective chromosome numbers were: 1) Diactor bilineatus (Fabr.) : spermatogonia with 20 + X, primary spermatocytes with 10 + X, X dividing equationaliv in the first division and passing undivided to one pole in the second. 2) Lcptoglossus gonagra (Fabr.) : spermatogonia with 20 + X, primary spermatocytes with 10 + X, X dividing equationally in the first division and passing undivided to one pole in the second. 3) Phthia picta (Drury) : spermatogonia with 20 + X, primary spermatocytes with 10 + X, X dividing equationally in the first division and passing undivided to one pole in the... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100004 |
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| Brieger,F. G.. |
| The study of pod corn seems still of much importance from different points of view. The phylogenetical importance of the tunicate factor as a wild type relic gene has been recently discussed in much detail by MANGELSDORF and REEVES (1939), and by BRIEGER (1943, 1944a e b). Selection experiments have shown that the pleiotropic effect of the Tu factor can be modified very extensively (BRIEGER 1944a) and some of the forms thus obtained permitt comparison of male and female inflorescences in corn and related grasses. A detailed discussion of the botanical aspect shall be given shortly. The genetic apect, finally, is the subject of the present publication. Pod corn has been obtained twice: São Paulo Pod Corn and Bolivia Pod Corn. The former came from one half... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100007 |
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| Registros recuperados: 91 | |
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