103,250 research outputs found
Hubner, G H, QX30038
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/393680Surname: HUBNER. Given Name(s) or Initials: G H. Military Service Number or Last Known Location: QX30038. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 51465.214733
Item: [2016.0049.25973] "Hubner, G H, QX30038
Use of pyrethroid analogues to identify key structural features for enhanced esterase resistance in Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae)
No full textIt has been reported previously that the major resistance mechanism to pyrethroid insecticides by the cotton bollworm Helicoverpa armigera (Hubner) in Australia is a consequence of overproduction of esterase isoenzymes. This paper reports structure-activity relationships that support such a view, based on in vivo bioassays conducted with a range of pyrethroid structures containing a variety of acid and alcohol moieties and the correlation with in vitro esterase inhibition assays against the same structures, and identifies the critical regions of the molecule with regard to esterase inhibition, and hence resistance. The implications of this work in terms of possible resistance management are evaluated and discussed. (c) 2007 Society of Chemical Industry
Direct observation of Fermi-pressure-driven electron-hole plasma expansion in GaAs on a picosecond time scale
No full textApplying pump and probe differential reflection (Delta R) and transmission (Delta T) of femtosecond light pulses inr either co- or counterpropagating pump and probe geometries, a direct time of flight method with submicrometer resolution is presented. With this technique we study the density-dependent transport of photogenerated carrier plasmas perpendicular to the surface of GaAs samples for delay times 20 ps less than or equal to tau less than or equal to 1 ns. At a pump fluence of 800 mu J cm(-2) a relatively sharp charge-carrier front was observed, with high velocities of 14 x 10(5) cm/s at a delay time tau approximate to 20 ps, decreasing as v proportional to tau(-2/3) to 2 x 10(5) cm/s at tau approximate to 350 ps. The arrival times tau of the carriers at a fixed sample thickness depend on the fluence of the pump pulses F such as tau proportional to 1/F-0.45. The results are discussed in the framework of diffusive transport with a strongly density-dependent diffusivity D. The data can be described consistently with the assumption of Fermi pressure as the dominating driving force fur plasma expansion
Bibliographie Hilarion G. Petzold 1958 – 2009 mit Anhang als Einführung
No full textDieses Archiv enthält die Gesamtbibliographie der Werke des Autors nebst einiger Texte „Über H. G. Petzold“ im Schlussteil der Bibliographie sowie einen Anhang mit einer Einführung in die Architektur des Werkes in seinem wissenslogischen Aufbau als Ausarbeitung seines „Tree of Science Modells“ (2007).This archive contains the complete bibliography of the author and some texts about H. G. Petzold, moreover an epilogue with an introduction to the architecture of the works in its epistemological structure and composition and as an elaborations of Petzold’s „Tree of Science Modell (2007).https://www.fpi-publikation.de/polyloge/01-2009-petzold-h-g-gesamtbibliographie-h-g-petzold-1958-2009-updating-november2009/peerReviewedpublishedVersio
Histological study of SlNPV infection on body weight and peritrophic membrane damage of Spodoptera litura larvae
No full textSanjaya, Machmudin D, Kurniawati ND. 2010. Kajian histologis infeksi SlNPV terhadap berat badan dan kerusakan
membran peritrofik larva Spodoptera litura. Nusantara Bioscience 2: 135-140. Pengaruh infeksi SlNPV pada berat badan dan kerusakan
membran peritrofik larva Spodoptera litura Fab. telah dilakukan. Metode yang digunakan adalah analisis probit, dan berdasarkan LD 50
virus yang terinfeksi untuk mengetahui berat badan dan kerusakan pasca infeksi. Kerusakan struktur histologi yang disebabkan oleh
infeksi SlNPV (0, 315, 390, 465, 540 dan 615 PIB/mL) diamati setelah 0, 12, 24, 72 dan 96 jam pasca infeksi. Preparasi histologis
dibuat dengan metode parafin setelah fiksasi dengan larutan Bouin, kemudian diiris setebal 7 um dan diwarnai dengan Hematoxilin-
Eosin. Hasil penelitian menunjukkan bahwa paparan SlNPV menyebabkan penurunan konsumsi pangan terutama pada 540 PIB/mL
dengan rata-rata 0.1675 mg. Pengamatan deskriptif pada struktur histologi membran peritrophic yang terkena infeksi SlNPV
menunjukkan kecenderungan kerusakan, sementara pada kontrol tidak ada kerusakan sama sekali. Semakin lama paparan virion di
dalam lumen midgut maka semakin tinggi terjadinya kerusakan membran peritrofik. Kerusakan paling parah terjadi 96 jam setelah
infeksi. Hasilnya membuktikan bahwa virion haNPV dapat menghancurkan struktur histologi midgut.
Kata kunci: SlNPV, Spodoptera litura, LD50, tingkat konsumsi, membran peritrophic
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Ultrafast spectroscopy with spin polarization
No full textA project for the design and r.alization of an experimental station dedicated to ultrafast spin polarization dynamics allowing for spin polarization measurements of photoelectron yield as excited by free electron laser pulses is presented
Spectral diffusion of single InP/GaxIn1-xP quantum dot luminescence
No full textHigh spatial resolution photoluminescence spectroscopy of single self-assembled InP quantum dots in a Ga0.5In0.5P matrix reveal an abrupt change from the common but yet unclear broad emission band at low temperatures to narrow lines at T greater than or equal to 45 K. The emission into narrow lines even at higher temperatures is the expected behaviour for a fully confined quantum system. The spectrally broad emission (several meV) from individual quantum dots at low temperatures is explained by fluctuating charge configurations surrounding the quantum dot and causing spectral diffusion of the transition energies via the quantum-confined Stark effect. The interacting charges are trapped by thickness variations in the surrounding wetting layer. At higher temperatures these traps are depleted due to the shift of the Fermi level E-F below the energy of the corresponding states in the wetting layer
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