ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

1

Monograph available for loan

The weather and climate of Australia and New Zealand (1996)

Sturman, A. P. ; Tapper, N. J.

Melbourne [u.a.] : Oxford Univ. Press

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Call number: PIK N 455-11-0233

Description / Table of Contents: Contents: Introduction and Global Setting ; The Study of the Atmosphere ; The Atmospheric Envelope and Radiative Processes ; The General Circulation of the Atmosphere ; Synoptic Scale Processes and Phenomena ; Atmospheric Stability and Air Mass Characteristics ; The Origins of Horizontal Motion ; Synoptic Scale Circulation ; Weather Systems in the Australia and New Zealand Origin ; Weather Forecasting ; Sub-Synoptic Scale Processes and Phenomena ; Mesoscale Circulation Systems ; Regional, Local, and Micro-Scale Climates ; Climate Change and Variability ; The Climatic Record and Recent Variability ; Present and Possible Future Climate Change

Type of Medium: Monograph available for loan

Pages: XI, 476 S. : Ill., graph. Darst., Kt.

ISBN: 0195533933

Location: A 18 - must be ordered

Branch Library: PIK Library

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2

Electronic Resource

A symbiosis expressed non-ribosomal peptide synthetase from a mutualistic fungal endophyte of perennial ryegrass confers protection to the symbiotum from insect herbivory (2005)

Tanaka, Aiko ; Tapper, Brian A. ; Popay, Alison ; [et al.]

Oxford, UK : Blackwell Science Ltd

Molecular microbiology 57 (2005), S. 0

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ISSN: 1365-2958

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Biology , Medicine

Notes: While much is known about the biosynthesis of secondary metabolites by filamentous fungi their biological role is often less clear. The assumption is these pathways have adaptive value to the organism but often the evidence to support this role is lacking. We provide the first genetic evidence that the fungal produced secondary metabolite, peramine, protects a host plant from insect herbivory. Peramine is a potent insect feeding deterrent synthesized by Epichloë/Neotyphodium mutualistic endophytes in association with their grass hosts. The structure of peramine, a pyrrolopyrazine, suggests that it is the product of a reaction catalysed by a two-module non-ribosomal peptide synthetase (NRPS). Candidate sequences for a peramine synthetase were amplified by reverse transcription polymerase chain reaction. Four unique NRPS products were identified, two of which were preferentially expressed in planta. One of these hybridized to known peramine producing strains. This clone was used to isolate an Epichloë festucae cosmid that contained a two-module NRPS, designated perA. Nine additional genes, which show striking conservation of microsynteny with Fusarium graminearum and other fungal genomes, were identified on the perA-containing cosmid. Associations between perennial ryegrass and an E. festucae mutant deleted for perA lack detectable levels of peramine. A wild-type copy of perA complemented the deletion mutant, confirming that perA is a NRPS required for peramine biosynthesis. In a choice bioassay, plant material containing the perA mutant was as susceptible to Argentine stem weevil (ASW) (Listronotus bonariensis) feeding damage as endophyte-free plants confirming that peramine is the E. festucae metabolite responsible for ASW feeding deterrent activity.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1365-2958.2005.04747.x

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3

Electronic Resource

Role of Intracellular pH in Proliferation, Transformation, and Apoptosis (1997)

Shrode, Lamara D. ; Tapper, Hans ; Grinstein, Sergio

Springer

Journal of bioenergetics and biomembranes 29 (1997), S. 393-399

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ISSN: 1573-6881

Keywords: Na+/H+ exchange ; proton pump ; V-ATPase ; anion exchange ; cancer

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Chemistry and Pharmacology , Physics

Notes: Abstract Both cellular proliferation and apoptosis (programmed cell death) have been claimed to be modulated, perhaps even triggered by, changes in intracellular pH. In this review, we summarize the evidence that gave rise to these hypotheses. To facilitate a critical appraisal of the existing data, we briefly review the main pathways involved in cytosolic pH homeostasis and their regulation by mitogens and by apoptosis-inducing agents. The information available at present suggests that cytosolic pH plays a permissive role in cellular growth and proliferation, but is neither a trigger nor an essential step in the mitogenic signal transduction cascade. Concerning apoptosis, it is clear that lowering the pH in vitro can activate DNase II. However, the evidence linking cytosolic acidification with DNA degradation in vivois presently not convincing. We conclude that the cytosolic pH, an essential physiological parameter that is tightly controlled by multiple, complementary, or redundant systems, is unlikely to play a role in signalling either cell growth or death.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1022407116339

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4

Electronic Resource

Atmospheric sulfur and nitrogen in West Java (1995)

Ayers, G. P. ; Gillett, R. W. ; Ginting, N. ; [et al.]

Springer

Water, air & soil pollution 85 (1995), S. 2083-2088

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ISSN: 1573-2932

Source: Springer Online Journal Archives 1860-2000

Topics: Energy, Environment Protection, Nuclear Power Engineering

Notes: Abstract Wet-only rainwater composition on a weekly basis was determined at four sites in West Java, Indonesia, from June 1991 to June 1992. Three sites were near the extreme western end of Java, surrounding a coal-fired power station at Suralaya. The fourth site was ∼100 km to the east in the Indonesian capital, Jakarta. Over the 12 months study period wet deposition of sulfate at the three western sites varied between 32–46 meq m−2 while nitrate varied between 10–14 meq m−2. Wet deposition at the Jakarta site was systematically higher, at 56 meq m−2 for sulfate and 20 meq m−2 for nitrate. Since sulfate and nitrate wet deposition fluxes in the nearby and relatively unpopulated regions of tropical Australia are both only ∼5 meq m−2 anthropogenic emissions of S and N apparently cause significant atmospheric acidification in Java. It is possible that total acid deposition fluxes (of S and N) in parts of Java are comparable with those responsible for environmental degradation in acid-sensitive parts of Europe and North America.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01186141

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5

Electronic Resource

Bafilomycin A1 inhibits lysosomal, phagosomal, and plasma membrane H+-ATPase and induces lysosomal enzyme secretion in macrophages (1995)

Tapper, Hans ; Sundler, Roger

New York, NY [u.a.] : Wiley-Blackwell

Journal of Cellular Physiology 163 (1995), S. 137-144

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ISSN: 0021-9541

Keywords: Life and Medical Sciences ; Cell & Developmental Biology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Biology , Medicine

Notes: Bafilomycin A1, a specific inhibitor of H+-ATPases of the vacuolar type, was in the present study shown, at similar concentrations, to induce secretion of lysosomal enzyme and to elevate lysosomal pH in mouse macrophages. These results lend support to the previous suggestion of a triggering role for an increase in lysosomal pH and a permissive role for cytosolic pH in the exocytosis of macrophage lysosomal enzyme. Vacuolar H+-ATPases are present in the macrophage plasma membrane as well as in intracellular membranes, for example, those of the lysosomal and phagosomal compartments. Phagosomal acidification was shown to be achieved in part by a mechanism with a similar sensitivity to bafilomycin A1 as lysosomal H+ transport and in part by an early, bafilomycin A1-insensitive mechanism. We found a lesser sensitivity towards bafilomycin A1 of the lysosomal and phagosomal H+-ATPase than that localized in the plasma membrane, indicating differences among H+-ATPases at the subcellular level. Also, by attempts to mobilize lysosomal H+-ATPase to the plasma membrane, support was obtained for the notion that subcellular H+-ATPase populations differ and thus possibly could be differentially regulated. © 1995 Wiley-Liss, Inc.

Additional Material: 5 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/jcp.1041630116

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6

Electronic Resource

Magnetization reversal measurements of size-selected iron oxide particles produced via an aerosol route (1998)

Schleicher, Bertram ; Tapper, Unto ; Kauppinen, Esko I. ; [et al.]

New York, NY [u.a.] : Wiley-Blackwell

Applied Organometallic Chemistry 12 (1998), S. 315-320

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ISSN: 0268-2605

Keywords: magnetization reversal ; iron oxide particles ; SQUID ; atomic force microscopy ; Chemistry ; Industrial Chemistry and Chemical Engineering

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: We report first measurements of the magnetization reversal of monodisperse 30 nm and 50 nm ferromagnetic Fe3O4 particles. These particles are produced in a carrier gas as an aerosol by spray pyrolysis. After production and size selection, they are precipitated on a silicon chip with a niobium SQUID (superconducting quantum interference device) incorporated on its surface. By changing a magnetic field in the plane of the SQUID, we can measure the magnetization reversal of the particles by the flux they induce into the SQUID. The angular dependence of this reversal is determined by rotating the magnetic field around the SQUID. Scanning electron microscope (SEM) images have confirmed the particle size and revealed the position of the collected particles. If the particle concentration is too high, we cannot detect changes in the magnetic moment of a single particle, but measure the magnetic properties of the whole assembly. If only a few particles are found on the SQUID loop the angular dependence of the magnetic reversal of a single particle can be measured; this result is compared with a simple model of magnetization reversal. © 1998 John Wiley & Sons, Ltd.

Additional Material: 6 Ill.

Type of Medium: Electronic Resource

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7

Electronic Resource

Zur Chemie des Kanemits [NaHSi2O5 · 3 H2O]x (1995)

Wieker, W. ; Heidemann, D. ; Ebert, R. ; [et al.]

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 621 (1995), S. 1779-1784

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ISSN: 0044-2313

Keywords: Protonated sodium layer silicate hydrate ; 29Si-, 23Na- and 1H-MAS-NMR ; dehydration ; Chemistry ; Inorganic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Description / Table of Contents: On the Chemistry of Kanemite [NaHSi2O5 · 3 H2O]xStarting from δ-Na2Si2O5 Kanemit was prepared by a direct exchange of Na+ by H+ in water containing reaction mixtures. By 29Si-, 23Na- and 1H-MAS-NMR investigations Kanemit was characterized as a layersilicate [NaHSi2O5 · 3 H2O]. By thermal treatment as well as by dehydration at room temperature under vacuum conditions a monohydrate is formed in which the layerstructure remains nearly unchanged. At temperatures between 100 and 110°C under normal conditions a hydrate phase of the composition [NaHSi2O5 · 0.25 H2O]x is prepared in which a changed silicate-layerstructure exists.

Notes: Kanemit wurde aus δ-Na2Si2O5 durch einen direkten Austausch von Na+ gegen H+ in wasserhaltigem Reaktionsmedium hergestellt. Mit Hilfe von 29Si-, 23Na- und 1H-MAS-NMR-Untersuchungen wurde nachgewiesen, daß der Kanemit ein Schichtsilicat der Zusammensetzung [NaHSi2O5 · 3 H2O]x ist. Bei der thermischen, wie auch bei der Entwässerung im Vakuum bei Raumtemperatur entsteht ein Monohydrat, in dem die Schichtstruktur weitgehend erhalten bleibt. Bei Temperaturen zwischen 100 und 110°C läßt sich auch eine Hydratphase der Zusammensetzung [NaHSi2O5 · 0,25 H2O]x nachweisen, in der aber eine veränderte Schichtsilicatstruktur vorliegt.

Additional Material: 8 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/zaac.19956211029

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