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  • 1
    ISSN: 1546-1696
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: [Auszug] We have generated more than 100 transgenic alfalfa plants, via Agrobacterium-mediated gene transfer, from genotypes se-lected from five alfalfa cultivars. These plants express the genes for kanamycin resistance and for the coat protein of al-falfa mosaic virus (AMV). The strongest expressers ...
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Tetrahedron Letters 31 (1990), S. 4597-4600 
    ISSN: 0040-4039
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
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  • 3
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    Unknown
    In:  Zoologische Mededelingen (0024-0672) vol.32 (1954) nr.24 p.291
    Publication Date: 2013-03-01
    Description: In the taxonomy of Coccoidea or scale insects much confusion is due to an insufficient knowledge of the type species of several genera. Especially our knowledge of some of the older genera is very incomplete, as the descriptions of their type species are extremely short and superficial from the modern point of view. The type specimens, on which the original descriptions of the genera were based, are distributed over several museums in all parts of the world; in some cases type material is no longer in existence, and as far as available it is seldom lent to persons in foreign countries. In consequence of this we have often to rely on the original description, as the type material is not available for examination. Signoret (Essai sur les Cochenilles, 1868-1876) was one of the first to describe the microscopical details of the genera and species which he introduced. He boiled his specimens in a solution of caustic potash to make microscopical preparations of the chitinous parts and did not hesitate to prepare even unique specimens ("que nous n'avons pas hésité à sacrifier dans l'intérêt de la science, tout en conservant les préparations bonnes à consulter, pensant qu'elles seraient ainsi plus utiles qu'une masse informe attachée à un épingle et qui ne peut présenter aucun caractère que l'on puisse énumérer"). In many cases, however, his descriptions are not detailed enough for the needs of present taxonomy. As the number of described species has increased greatly since Signoret's time, it has become necessary to pay attention to several minute details which were formerly of no importance to separate the species then known. In consequence of the superficial descriptions by earlier authors the concepts of several genera are rather vague. Ferris has emphasized that in order
    Keywords: 42.75
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 4
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    Unknown
    In:  Beaufortia (0067-4745) vol.6 (1957) nr.70 p.115
    Publication Date: 2014-10-27
    Description: Among some coccids from Indonesia, received from Dr. L. G. E. KALSHOVEN, four large specimens were found which by their well developed ovisac showed some resemblance to Icerya purchasi MASK. After comparing the specimens with the photographs in MORRISON’S Classification of the Margarodidae (1928) it appeared, however, that the wax covering of the body was more alike that of Walkeriana floriger (WALKER). The old pinned specimens were not labelled, but Dr. KALSHOVEN remembered that they had been collected by Prof. ROEPKE on „tjemara” (Casuarina). Upon inquiry Prof. ROEPKE informed me that in 1910 he had collected a giant coccid on old stems of Casuarina Junghuhniana MIQ. in the Tengger Mts. (East-Java). The specimens were found on trees near the last bend of the road leading to Tosari, a well-known health-resort at an elevation of about 1750 m, where Europeans often used to spend their holidays. Some specimens had been sent to Mr. E. E. GREEN in Ceylon who replied that it was a species of Walkeriana, but that he wanted the larvae for a description of this new species.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 5
    facet.materialart.
    Unknown
    In:  Beaufortia (0067-4745) vol.11 (1964) nr.140 p.95
    Publication Date: 2014-10-27
    Description: The following species have been reported from the Netherlands’ Antilles: Margarodes formicarum Guilding, collected in 1884 or 1885 by Prof. W. F. R. Suringar in Curaçao; specimens in the State Museum of Natural History at Leiden. Protortonia cacti (Linn.), collected in 1756 by Daniel Rolander in St. Eustatius, and described by Linnaeus (1758) and de Geer (1776). Protortonia crotonis n. sp. from Bonaire. Icerya purchasi Maskell from Curaçao. Orthezia praelonga Douglas, common in Curaçao and Aruba. O. insignis Browne is in our collection only represented from St. Eustatius. Coccus sp. (not C. agavis Towns. & Ckll.) from Agave in Curaçao and St. Martin. Suissetia oleae (Bern.) from Curaçao and St. Eustatius. Saissetia coffeae (Walker), syn. S. hemisphaerica (Targ. Tozz.) from Curaçao and Aruba. Ceroplastes caesalpiniae n. sp. from dividivi (Caesalpinia coriaria) in Curaçao. This Ceroplastes is already mentioned by VERSLUYS (1907) as a pest of dividivi, but it seems that the species has not yet been described. Ceroplastes magnicauda n. sp. from Curaçao; not identifiable from available literature. Pulvinaria urbicola Ckll. from Curaçao and St. Martin. Pulvinaria sp. from Aruba; resembles P. mammeae Maskell, but different. Coccus sp. from Thespesia populnea (Malvaceae) in Aruba; material too scanty for identification or description. Dysmicoccus brevipes (Ckll.) from Bonaire. Ferrisiana virgata (Ckll.) and Phenacoccus solani Ferris from Curaçao. Antonina graminis Maskell on the rootcollar of Fimbristylus spathacea (Cyperaceae) in Curaçao. Eriococcus curassavicus n. sp. is probably identical with or closely allied to E. tucurincae Laing from Colombia; all female and male stages of the Curaçao-species are described. Asterolecanium pustulans Ckll. from Curaçao. Conchaspis angraeci Ckll. has been collected in Curaçao by G. E. Bodkin. Aspidiotus destructor Sign, from Bonaire. Acutaspis scutiformis (Ckll.), Aonidiella orientalis (Newst.), and Lepidosaphes alba Ckll. frcm Aruba. Unaspis citri (Comstock), Lepidosaphes beckii (Newman), and L. gloverii (Packard) are common on Citrus in Curaçao. Diaspis echinocacti (Bouché) from Opuntia in Curaçao. Pseudaulacaspis peutagona (Targ. Tozz.) from Aruba and St. Eustatius. Hemiberlesia diffinis Newst. was found on dividi in Curaçao, Pinnaspis strachani (Cooley); label not legible, but certainly from the Dutch Antilles; this species is already reported by VAN HALL (1905) from Curaçao. The 4 new species, Eriococcus curassavicus, Protortonia crotonis, Ceroplastes caesalpiniae, and C. magnicauda are described above. An aphid from Bonaire was identified by Mr. D. Hille Ris Lambers as Aphis nerii Fonsc., and an aleyrodid from Curaçao by Miss Louise M. Russell as Aleurotrachelus trachoides (Back).
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 6
    facet.materialart.
    Unknown
    In:  Zoologische Mededelingen (0024-0672) vol.32 (1954) nr.21 p.233
    Publication Date: 2013-03-01
    Description: In 1950 I received from Mr. D. Hille Ris Lambers a strange Pseudococcid from Java which had been collected by Mr. F. W. Rappard, a senior forestry officer, who regularly collects aphids for Mr. Hille Ris Lambers on his tours of duty. As this insect was a coccid, it was transmitted to me for examination. Its appearance is quite abnormal; the shape of its body reminds one almost of a large mite (fig. 4). The 6-segmented antennae have a dense vestiture of fine hairs, with exception of the 2 first segments which are very short. A tuft of 5 very long setae is present on the top of each of the anal lobes. The ungual digitules are extremely large and very flat. It was only after close study that the insect was recognized as a Pseudococcid. It has 2 pairs of ostioles in the usual position, a circulus on the ventral side of the second abdominal segment, and a few trilocular pores on both sides of the body. As I suspected an abnormal mode of living, I asked Mr. Hille Ris Lambers to write to Java for further particulars, and more material. To comply with this request Mr. Rappard has collected abundant material and communicated his field notes on these insects, which he calls "ant-riders" from their peculiar habit of climbing upon the black ants by which they are closely attended, as soon as these ants are disturbed, to have themselves transported in this way. The material at hand contains 3 different instars which seem to represent first and second stage larvae, and immature adult females. Of the latter stage only 3 specimens are available. Eggs or embryos were not observed in these specimens, but in one of them the oviduct and its exterior opening (one segment behind the posterior ostioles) is faintly visible in the chitinous
    Keywords: 42.75
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 7
    facet.materialart.
    Unknown
    In:  Beaufortia (0067-4745) vol.10 (1963) nr.115 p.29
    Publication Date: 2014-10-27
    Description: Filippia orientalis n.sp. can be recognized by the following characters. The adult female has next to chisel-shaped spines around the margin of the body 4 such spines on the outer side of the anal plates (fig. 11). The adult male has only one long seta (about 250 μ) in the glandular depressions which produce the caudal wax-tails. The first stage larva is provided with long stigmatic spines (ca. 60 μ) and slender conical spines along the margin of the body (fig. 19). The second stage larva has chisel-shaped spines around the margin of the body like the adult female (fig. 22). On the anal plates only the discal and the apical seta are chisel-shaped, the 2 setae on the mesal side of the plate have the usual shape (fig. 20). Types in the Zoological Museum at Amsterdam, of second stage larvae, prepupae and pupae in the Museum of Natural History at Leiden.
    Repository Name: National Museum of Natural History, Netherlands
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  • 8
    facet.materialart.
    Unknown
    In:  Beaufortia (0067-4745) vol.8 (1961) nr.92 p.121
    Publication Date: 2014-10-27
    Description: New Guinea is next to Greenland the largest island in the world; its area is about 785000 sq. kilometers (with adjacent islands ca. 806000 sq.kms). It lies within the tropics, quite near the equator, and is largely covered by a luxuriant vegetation, so that a rich fauna of scale insects may be expected, though extremely little has been published on this subject. In FERNALD’S catalogue with supplements (1903—1915), and in the Zoological Record for the years 1915—1957, only 4 new species are reported from New Guinea, viz. Myxolecanium kibarae BECCARI (FERNALD No. 1005), Aulacaspis major RUTHERFORD, Ceroplastes murrayi FROGGATT, and Steatococcus samaraius MORRISON (Zool. Ree. 1916, 1919, and 1927).
    Repository Name: National Museum of Natural History, Netherlands
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  • 9
    Publication Date: 2011-05-12
    Description: Analytical Chemistry DOI: 10.1021/ac2002774
    Print ISSN: 0003-2700
    Electronic ISSN: 1520-6882
    Topics: Chemistry and Pharmacology
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  • 10
    Publication Date: 2019
    Description: Sustainable water management is one of the important priorities set out in the Sustainable Development Goals (SDGs) of the United Nations, which calls for efficient use of natural resources. Efficient water management nowadays depends a lot upon simulation models. However, the availability of limited hydro-meteorological data together with limited data sharing practices prohibits simulation modelling and consequently efficient flood risk management of sparsely gauged basins. Advances in remote sensing has significantly contributed to carrying out hydrological studies in ungauged or sparsely gauged basins. In particular, the global datasets of remote sensing observations (e.g., rainfall, evaporation, temperature, land use, terrain, etc.) allow to develop hydrological and hydraulic models of sparsely gauged catchments. In this research, we have considered large scale hydrological and hydraulic modelling, using freely available global datasets, of the sparsely gauged trans-boundary Brahmaputra basin, which has an enormous potential in terms of agriculture, hydropower, water supplies and other utilities. A semi-distributed conceptual hydrological model was developed using HEC-HMS (Hydrologic Modelling System from Hydrologic Engineering Centre). Rainfall estimates from Tropical Rainfall Measuring Mission (TRMM) was compared with limited gauge data and used in the simulation. The Nash Sutcliffe coefficient of the model with the uncorrected rainfall data in calibration and validation were 0.75 and 0.61 respectively whereas the similar values with the corrected rainfall data were 0.81 and 0.74. The output of the hydrological model was used as a boundary condition and lateral inflow to the hydraulic model. Modelling results obtained using uncorrected and corrected remotely sensed products of rainfall were compared with the discharge values at the basin outlet (Bahadurabad) and with altimetry data from Jason-2 satellite. The simulated flood inundation maps of the lower part of the Brahmaputra basin showed reasonably good match in terms of the probability of detection, success ratio and critical success index. Overall, this study demonstrated that reliable and robust results can be obtained in both hydrological and hydraulic modelling using remote sensing data as the only input to large scale and sparsely gauged basins.
    Electronic ISSN: 2072-4292
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Published by MDPI
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