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| Registros recuperados: 91 | |
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| Paiva Netto,J. E. de; Catani,R. A.. |
| In the vicinity of the city of Rio Claro (S. Paulo, Brazil) occurs a type of calcareous rock which was studied chemically, spectrographically and roentgenographically. The roentgenograph investigations showed that the rock belong to the hydromagnocalcite, CaCO3+Mg(OH)2, and not the dolomitic type as it was considered up to the present. The first four roentnogramms show the crystalline structure of the mineral and the fifth the crystalline structure of the synthetic mixture of CaCO3+Mg(OH)2 in the proportions indicated by the chemical analysis of table I. The spectrographical analysis revealed the presence of: Mn, Fe, Al, Sn, Cu, Na, Sr, Zn and Pb, the percentages of which reached a value less than 0,1%. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051945000500003 |
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| Brieger,F. G.. |
| 1) The present paper deals with variations in the structure of the inflorescences of the Maydeae Americanae, especially of the ear of Zea Mays, which came under observation during our genetical studies during the last 10 years. Care was tauken to include only such structures which were observed frequently and had in general an aspect which could not be described as a pathological abnormality, but rather as a reversion to a phylogenetically primitive type or as a new form. The aberrations may be summarized as follows: a) Individual flowers. Eeversion to the hermaphrodite state of the usually unisexual flowers in Maydeae were described. Such flowers are however already so well known that no details need to be given. b) Many flowered spikelets. The spikelet... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051945001100001 |
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| Brieger,F. G.; Moreira,Sílvio. |
| The English resumé is given in a different form from the Portuguese "conclusões". In the former we gave mainly the results which may be of general interest, explaining the tables (quadros) and the procedure of statistical analysis, while in the other the properties of the different rootstocks are discussed in detail since they are of immediate local interest. 1. In a previous publication, Moreira (19) explained the layout and the first results of an experiment, under way since 1936 in the Limeira Exp. Sta., on the influence of twelve different types of Citrus rootstocks on three scion varieties : the oranges "Baianinha" and "Pera" and the grape-fruit "Marsh Seedless". We report here three main results obtained during the first six years of the experiment:... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051945001000001 |
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| Lam, H.J.. |
| We always have thoroughly detested the mentality of those scientific periodicals which deemed it proper to introduce politics into their columns. During the war we have repeatedly been offended by the unworthy attitude of the editorial staffs of certain botanical journals of “Greater Germany” who admitted — or possibly even deliberately furthered — perorations stating not only the marvellous achievements of nazi-methods and their amazing usefulness towards the particular field of science covered by the periodical in question, but the faith and the devotion of their persons towards the sacred cause of the nazi-system. We have, as I say, not exactly admired this mentality in a scientific paper and we will not follow the example. However, too much has... |
| Tipo: Article / Letter to the editor |
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| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/525897 |
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| Hellebrekers, W.Ph.J.. |
| In a previous paper (Hellebrekers, 1942) I stated my intention to give some more details on imperfectly known eggs, based on material of the collection of the Penard's. The description of these hitherto imperfectly known or incorrectly described eggs will be strongly aided by the coloured plate accompanying the present paper, this plate represents a number of eggs of four species of birds from Surinam, of each species such eggs are figured as to show the variation in shape and colour. Moreover I have the opportunity to give a number of corrections concerning some of the data given in my previous paper. When the latter appeared I sent a copy to Mr. M. Schönwetter, one of the foremost living authorities in oölogy, asking him for a critical comment on my... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.83. |
| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/318793 |
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| Krug,C. A.; Carvalho,Alcides. |
| No presente artigo, após uma descrição detalhada dos caracteres da variedade anomala de C. arabica, são relatados os resultados da sua análise genética. Concluiu-se que se trata de uma forma recessiva em relação ao tipo normal da espécie, propondo-se para o único par de gens responsáveis o símbolo an an. A ação dêste par de gens é notável, afetando a quase totalidade dos caracteres da planta, como : porte, ramificação, fôlhas, flores, frutos e sementes. O F1, normal x anômala, demonstra dominância praticamente total do tipo normal, manifestando-se a presença do alelo recessivo apenas esporadicamente, deformando, possivelmente sob ação de determinados fatôres do meio ambiente, ou em consequência de alguma anomalia citológica, os ápices de alguns pares de... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051945001200002 |
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| Torres,A. Di Paravicini; Piedade,Álvaro. |
| Na Seção de Avicultura da Escola Superior de Agricultura "Luiz de Queiroz", da Universidade de São Paulo, foi iniciada uma experiência de pastagens para galinhas, para determinação das espécies mais adequadas ao fim visado. Os resultados obtidos neste primeiro ano de experiência indicaram a seguinte classificação: 1.o - Consociação de Grama Seda (Cynodon dactylon Pers.) var.? com Capim Quicúio (Pennisetum clandestinum Chiov.). 2.0 - Grama Seda (Cynodon dactylon Pers.) var.? 3.0 - Capim Quicúio (Pennisetum clandestinum Chiov.). 4.O - Grama de Batatais (Palpalum notatum Flügge.). 5.o - Uma grama ainda não determinada. 6.o - Grama Paulista (Cynodon dactylon Pers.) var.? A variedade Gigante de Cynodon dactylon Pers. não deu resultados satisfatórios. A... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1945 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100014 |
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| Smith, J.J.. |
| In Blumea V (1943), 316, I published a list of the Orchidaceae collected by Dr van Steenis in Atjeh. In this list a certain number of specimens were purposely omitted, on account of the fact that flowers had been preserved in alcohol, which material, however, was apparently not extant in Leiden. Under these conditions I have worked up the herbarium so far as possible from the dried specimens only. Peristylus goodyeroides (D. Don) Lndl. Gen. et Sp. Orch. (1835), 299; etc. |
| Tipo: Article / Letter to the editor |
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| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/525239 |
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| Hooijer, D.A.. |
| Some time ago Dr. L. D. Brongersma, curator of the Leiden Museum, entrusted me for examination some subfossil equine teeth, received from Mr. H. van Hoepen, who had found them between Glen and Mazelspoort, in Orange Free State. The teeth proved to belong all to one and the same individual, and to constitute the entire upper premolar-molar-series of the right side, almost undamaged. The importance of this find is evident, as most of the fossil or subfossil equine species from S. Africa are based on isolated teeth. An inner view of our specimen is given in pl. VI lower figure, the crown surfaces are represented in the upper figure of the same plate. It can be seen, that the P4 is the longest tooth, its height is 72 mm. The mesostyle is prominent, and... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 38.22; 42.84. |
| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/318787 |
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| Buitendijk, A.M.. |
| De Haan (1833, p. 22-23, tab. B (Eudora) tenax (mouthparts)) gives the following latin description of his subgenus Eudora: "Os quadratum. Max. 5arum articuli secundi paralleli, medio in longitudinem sulcati, apice truncati; articuli tertii dilatati, margine superiore emarginati; articuli apicales abbreviati1). Max. 3iarum laciniae externae supra medium, paulum dilatatae, apice emarginatae. Max. 2arum lobi interni in laciniis interioribus externis multo breviores. Thorax vix dimidio latior quam longior, dorso convexus. Chelae crassae, in utroque sexu inaequales, sinistra minor. Abdomen in utroque sexu 7-articulatum; in maribus angusto-parallelum; articulus tertius prioribus latior; articuli versus apicem sexti sinuato-angustiores; sextus quadratus; Septimus... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.74. |
| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/319147 |
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| Holthuis, L.B.. |
| On the initiative of Dr. A. D. J. Meeuse investigations were made on the fauna of the greenhouses of several Botanic Gardens in the Netherlands; material was also collected in greenhouses of other institutions and in those kept for commercial purposes. The isopods contained in the collection afforded many interesting species, so for instance six of the species are new for the Dutch fauna, viz., Trichoniscus pygmaeus Sars, Hyloniscus riparius (Koch), Cordioniscus stebbingi (Patience), Chaetophiloscia balssi Verhoeff, Trichorhina monocellata Meinertz and Nagara cristata (Dollfus). Before the systematic review of the species a list of the localities from which material was obtained is given here with enumeration of the collected species. I. Greenhouses of the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.74. |
| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/317941 |
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| Holthuis, L.B.. |
| At present five species of Armadillidiidae, all belonging to the genus Armadillidium Brdt., are known from the Netherlands. These five species are Armadillidium vulgare (Latr.), A. nasutum B.-L., A. opacum (Koch), A. album Dollf., and A. pulchellum (Zenk.). The species will be dealt with in this order. Of every species, with the exception of A. vulgare, an enumeration is given here of the material present in the collection of the Rijksmuseum van Natuurlijke Historie at Leiden, the material collected in greenhouses excluded. Armadillidium (Armadillidium) vulgare (Latreille) This species, which is known also under the name Armadillidium cinereum (Zenk.), is the most common species of the genus from the Netherlands. It may be found throughout our country, and... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 42.74. |
| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/319303 |
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| Backer, C.A.. |
| In a previous number of this volume (Blumea V, nr. 1, 1942, p. 66—80), one of the junior writers of the present paper published an account of nomenclatorial changes concerning javanese Verbenaceae. This paper was written as a supplement to a larger work by the senior writer, who has for long years devoted most of his activities to the study of the flora of Java, on which it was his privilege to publish some more or less extensive papers, all of them in the Dutch language 2). These publications may be considered materials for a Flora of Java. In fact, some of them have the character and even the title of such a flora, though on account of several circumstances none of them could be completed. Since the senior writer had retired from his official duties, an... |
| Tipo: Article / Letter to the editor |
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| Ano: 1945 |
URL: http://www.repository.naturalis.nl/record/524581 |
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| Registros recuperados: 91 | |
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