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  • 1
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    Human Genome Project: data quality (1998)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1998-03-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Green, P -- New York, N.Y. -- Science. 1998 Feb 20;279(5354):1115-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9508680" target="_blank"〉PubMed〈/a〉
    Keywords: Computer Simulation ; *Human Genome Project ; Humans ; Quality Control ; Reference Standards ; Sequence Analysis, DNA/*standards
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Chromium oxide trifluoride (CrOF3) preparation and properties (1982)
    s.l. : American Chemical Society
    Inorganic chemistry 21 (1982), S. 3562-3565 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00139a057
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  • 3
    Electronic Resource
    Electronic Resource
    Organogenesis-A Biophysical View (1980)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology 31 (1980), S. 51-82 
    Details
    ISSN: 0066-4294
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.pp.31.060180.000411
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  • 4
    Electronic Resource
    Electronic Resource
    Behavioural and neurophysiological responses ofSpodoptera littoralis to azadirachtin and a range of synthetic analogues (1995)
    Springer
    Entomologia experimentalis et applicata 77 (1995), S. 69-80 
    Details
    ISSN: 1570-7458
    Keywords: azadirachtin ; azadirachtin analogues ; Spodoptera littoralis ; antifeedant ; behaviour ; electrophysiology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The antifeedant activity of azadirachtin and 56 azadirachtin analogues, including 22,23-dihydroazalirachtin, against larvae ofSpodoptera littoralis was investigated using behavioural and electrophysiological bioassays. None of the analogues was as active as azadirachtin, although many showed significant antifeedant activity at high concentrations. The majority of the analogues stimulated a dose-dependent response from a neurone in the medial styloconic maxillary sensilla which correlated with the behavioural activity. Methylation of the hydroxy substitutions on the azadirachtin molecule usually resulted in a decrease in antifeedant activity, as did the addition of bulky groups to the dihydrofuran ring.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02383020
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  • 5
    Electronic Resource
    Electronic Resource
    Quantitative analysis of delayed fracture observed in stress rate tests on brittle materials (1982)
    Springer
    Journal of materials science 17 (1982), S. 3227-3234 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Delayed fracture in brittle materials may be demonstrated by observing the change in bend strength over a range of constant stress rates to failure. A simple technique has been developed to analyse this behaviour making efficient use of the experimental data. Based on a model incorporating theories of stress corrosion and brittle fracture, with Weibull statistics, the technique provides estimates of relevant parameters using the method of maximum likelihood. Confidence intervals of estimates, the significance of any observed rate effect, and the validity of the model are also assessed. The technique is demonstrated by applying it to data from bend tests on soda-lime glass and WC-Co materials.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01203487
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  • 6
    Electronic Resource
    Electronic Resource
    Effects of ethylene on the orientation of microtubules and cellulose microfibrils of pea epicotyl cells with polylamellate cell walls (1982)
    Springer
    Protoplasma 110 (1982), S. 5-14 
    Details
    ISSN: 1615-6102
    Keywords: Cell wall ; Ethylene ; Microfibrils ; Microtubules ; Radial cell expansion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Following a 5 hours ethylene treatment, cortical cells of Pea (Pisum sativum L. var Alaska) epicotyl third internode showed a change in the orientation of both microtubules near the plasma membrane and recently deposited cellulose microfibrils. Control cortical cells had mostly transverse microtubules. The ratio of the average frequency of transverse to longitudinal microtubules was 6.0. After 5 hours of ethylene treatment, cortical cells had mostly longitudinal microtubules, with the ratio of transverse to longitudinal microtubules equal to 0.1. Epidermal cells were more variable than cortical cells with regard to the frequency of longitudinal and transverse microtubules. Observation of cortical cell walls in conventionally stained thin sections revealed that recent deposition of microfibrils had been primarily transverse in almost all of the control cortical cells sampled. In contrast, more than half of the ethylene-treated cortical cells had recent deposition oriented primarily longitudinally. This change in microtubule and microfibril orientation may be early enough to constitute the primary effect of ethylene leading to radial cell expansion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01314675
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  • 7
    Electronic Resource
    Electronic Resource
    A comparative study of the grading coefficient, a new particle size distribution parameter (1999)
    Springer
    Bulletin of engineering geology and the environment 57 (1999), S. 215-223 
    Details
    ISSN: 1435-9537
    Keywords: Key words Grading ; Particle size distribution ; Grading coefficient ; Unsealed roads
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Résumé L'importance de la granulométrie d'un matériau graveleux à utiliser sur des routes non-revêtues est connue depuis longtemps. Plusieurs paramètres ont eté developpés pour permettre l'interprétation des courbes granulométriques en fonction d'un seul paramètre pour faciliter les applications, contrôles et comparaisons. On montre qu'il existe des corrélations importantes entre beaucoup de paramètres bien connus, bien qu'il soit évident aussi que la dispersion des données indique qu'il se peut que ces paramètres sont indicatifs de propriétés qui diffèrent légèrement l'une de l'autre. L'étude a montré qu'un paramètre nouveau, le coefficient de granularité, est un bon indicateur de la granulométrie et qu'on peut l'utiliser de façon interchangeable avec beaucoup d'autres paramètres. En termes généraux, le coefficient de granularitééquivaut à peu près à la moitié du pourcentage du matériau graveleux dans un matériau donné, et les coefficients de granularité de 16 et 34 équivalent à peu près aux modules de granularité de 1.5 et 1.6 respectivement.
    Notes: Abstract  The importance of the particle size distribution (grading) of a gravel material for unsealed roads has long been recognized. Various parameters have been devised to allow interpretation of grading curves in terms of a single parameter for ease of application, control and comparison. It is shown that there are significant correlations between many of the better known parameters, although it is also clear from the scatter of the data that the parameters probably indicate slightly different properties. The investigation has shown that a new parameter, the grading coefficient, is a good indicator of the grading and can be used interchangeably with many other parameters. In general terms the grading coefficient is approximately half the percentage gravel in a material and grading coefficients of 16 and 34 are roughly equivalent to grading moduli of 1.5 and 2.6, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100640050039
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  • 8
    Electronic Resource
    Electronic Resource
    Detecting Resistance to Organophosphates and Carbamates in the Cattle Tick Boophilus Microplus, with a Propoxur-based Biochemical Test (1999)
    Springer
    Experimental and applied acarology 23 (1999), S. 907-914 
    Details
    ISSN: 1572-9702
    Keywords: Boophilus microplus ; cattle tick ; pesticide resistance ; organophosphate ; biochemical test
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Rapid and sensitive detection of resistance to insecticides in arthropods is needed. In the cattle tick, Boophilus microplus, resistance to a variety of acaricides is widespread. The most commonly used assay for resistance, the larval packet test, takes at least two, but generally six weeks for a one-host tick like B. microplus to complete and may take up to three months to complete for three-host ticks. Here we describe a test for resistance to organophosphate acaricides that can be used on larvae and adult ticks which takes less than 24 hours. The test measures the difference in acetylcholinesterase (AChE) activity in homogenates of ticks in the presence and absence of propoxur, a carbamate acaricide. We found clear discrimination of organophosphate-susceptible and organophosphate-resistant adults with 100 μM propoxur. AChE from susceptible ticks had almost no activity at this concentration of propoxur whereas AChE from resistant ticks had 67% of its potential activity. AChE from heterozygote ticks could also be distinguished from AChE from homozygous-susceptible and homozygous-resistant ticks. This is the first biochemical test for resistance to an acaricide. Rapid, sensitive tests like ours will allow resistance to organophosphates to be detected soon after it develops in the field, thus, the spread of resistance might be slowed and the useful life of acaricides extended.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006364816302
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  • 9
    Electronic Resource
    Electronic Resource
    Monooxygenases Play Only a Minor Role in Resistance to Synthetic Pyrethroids in the Cattle Tick, Boophilus Microplus (1999)
    Springer
    Experimental and applied acarology 23 (1999), S. 897-905 
    Details
    ISSN: 1572-9702
    Keywords: Boophilus microplus ; tick ; Ixodida ; resistance ; synthetic pyrethroid ; monooxygenases
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We investigated the role of monooxygenases in resistance to synthetic pyrethroids (SPs) in the cattle tick, Boophilus microplus. We found that monooxygenases play only a minor role in resistance to SPs in both resistant and susceptible strains of B. microplus. We blocked the monooxygenases with piperonyl butoxide (PBO) and simultaneously applied the SPs, flumethrin and cypermethrin to larval B. microplus. PBO increased the effect of flumethrin (synergism ratios 2.7–8.9) more than it increased the effect of cypermethrin (synergism ratios 1.9–3.1). Of the four strains tested, Parkhurst, which is resistant to SPs, was the least affected by the addition of PBO (synergism ratios after cypermethrin was applied 1.9; after flumethrin 2.7) whereas N.R.F.S., the strain susceptible to SPs, was the most affected by synergism between PBO and SPs (synergism ratio after cypermethrin was applied 3.1; after flumethrin 8.9). We hypothesize that B. microplus lacks monooxygenases capable of conferring resistance to SPs because it and its recent ancestors were blood-feeders rather than herbivores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006245800759
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  • 10
    Electronic Resource
    Electronic Resource
    Sensitized photoinitiated grafting of N-vinyl-2-prrolidone (NVP) to woolen substratesFor details of the Ames testing procedure, see ref. 1. (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 26 (1981), S. 521-527 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The photoinitiated copolymerization of N-vinyl pyrrolidone onto woolen substrates from aqueous solutions has been studied. A novel water-soluble photosensitizer, 4-(sulpomethyl) benzil sodium salt (Quantacure SKS - patent pending), has been developed and its efficiency assessed with and without an amine synergist. The initiator is nonmutagenic within the terms of the Ames testing procedure. Induction periods were not observed. The action of the so-called synergist, dimethylaminoethanol, was to reduce or stop the grafting reaction. The significance of the pH of the aqueous medium is shown by a maximum in grafting being observed at pH = 4.0 for otherwise standard conditions. Aspects of impregnation procedure were examined, marked improvements in the grafting level being achieved by use of preliminary evacuation - freeze/thaw cycles.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1981.070260212
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