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  • 1
    Electronic Resource
    Electronic Resource
    Rice-soil interactions in Vietnamese acid sulphate soils: impacts of submergence depth on soil solution chemistry and yields (2001)
    Oxford, UK : Blackwell Publishing Ltd
    Soil use and management 17 (2001), S. 0 
    Details
    ISSN: 1475-2743
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract. The aim of this study was to investigate the effects of water submergence depth on radial oxygen loss (ROL), soil solution chemistry and rice growth performance in acid sulphate soils in southern Vietnam. ROL was measured in a solution culture. In a separate pot experiment the impact of water submergence depth on rice growth and soil solution chemistry was studied. Three submergence depths were used in the two experiments (5, 10 and 15 cm). ROL declined with submergence depth and was significantly greater in young roots (with no root hairs) than in older roots. In the pot experiment rice growth and soil solution chemistry were clearly affected by the submergence depth. During the first crop at 5 cm submergence, there was a significantly higher yield and a higher oxidation state (pe+pH) compared to 10 or 15 cm submergence. The Fe concentration was significantly greater at the 5 cm depth compared to the 10 or 15 cm depth. SO42– reduction was delayed at the 5 cm depth. Rice yield was c. 25% less at the 15 cm than at the 5 cm depth. During a second crop, there was a substantial SO42- reduction and H2S formation and almost no significant effects of submergence depth on either soil solution chemistry or crop yield. In a field experiment with a dry-season rice crop, yield and Fe, Al and SO42– concentrations were higher at a shallow submergence depth than at greater depths in the same field, showing similar depth trends to those found during the first crop in the pot experiment. Farmers should be advised to use a shallow submergence depth and, if possible, avoid deep-rooted rice varieties. A conceptual model is suggested, which summarizes the relationships between ROL and soil solution chemistry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-2743.2001.tb00011.x
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  • 2
    Electronic Resource
    Electronic Resource
    Characterization of Human Lymphocyte Surface Receptors for Mitogenic and Non-mitogenic Substances (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 11 (1980), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: To compare the receptor patterns for mitogenic and non-mitogenic substances, surface glycoproteins of human lymphocytes were labelled with the lactoperioxidase-catalysed iodination technique and with a galactose oxidase-tritiated sodium borohydride technique. Labelled cells were detergent-solubilized, and the lysates were allowed to react with insolubilized purified mitogenic lectins, phytohaemagglutinin, leucoagglutinin and an insolubilized non-mitogenic lectin, oxidized leucoagglutinin. Lectin-reactive protein were eluted with sodium dodecyl sulphate (SDS) buffer. Cell membrane components reactive with anti-lymphocyte globulin (ALG) were retrieved by indirect immunoprecipitation with protein-A-bearing staphylococcus Cowan I strain (SaCI). Lectin-and ALG-reactive proteins were analysed by SDS polyacrylamide gel electrophoresis. Iodinated glycoproteins regularly showed four major components with molecular weight of 120,000, 70,000 60,000 and 43,000 daltons, respectively, on 7% gels. An additional broad peak in the molecular weight range 20,000–35,000 daltons found on 10% gels. Tritiated glycoproteins also showed four major components with MW 120,000, 70,000, 60,000 and 42,000, respectively, which reacted with lectin and ALG. In addition, ALG reacted with some glycoproteins with MW between 150,000 and 230,000 daltons. On 10% gels additional lectin and ALG-binding glycoproteins with MW around 30,000 daltons were found. The similarity in structures bound by mitogenic and non-mitogenic substances indicated that lymphocyte activation may depend on some properly conferred by the mitogen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1980.tb00002.x
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  • 3
    Electronic Resource
    Electronic Resource
    Periwound dopaminergic sprouting is dependent on numbers of wound macrophages (2002)
    Oxford, UK : Blackwell Science, Ltd
    European journal of neuroscience 15 (2002), S. 0 
    Details
    ISSN: 1460-9568
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Injury to many regions of the central nervous system, including the striatum, results in a periwound or ‘abortive’ sprouting response. In order to directly evaluate whether macrophages play an important role in stimulating periwound sprouting, osteopetrotic (op/op) mice, which when young are deficient in a variety of macrophage subtypes, were given striatal wounds and the degree of dopaminergic sprouting subsequently assessed. Two weeks postinjury, significantly fewer wound macrophages were present in the striata of op/op mice compared with controls (144 ± 30.1 in op/op mice vs. 416.6 ± 82.3 in controls, P 〈 0.005, analysis performed on a section transecting the middle of the wound). Dopamine transporter immunohistochemistry revealed a marked decrease in the intensity of periwound sprouting in the op/op group of animals. Quantification of this effect using [H3]-mazindol autoradiography confirmed that periwound sprouting was reduced significantly in the op/op mice compared with controls (71.4 ± 21.7 fmol/mg protein in op/op mice vs. 210.7 ± 27.1 fmol/mg protein in controls, P 〈 0.0005). In the two groups of animals the magnitude of the sprouting response in individuals was closely correlated with the number of wound macrophages (R = 0.83, R2 = 0.69). Our findings provide strong support for the crucial involvement of macrophages in inducing dopaminergic sprouting after striatal injury.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1460-9568.2002.01914.x
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  • 4
    Electronic Resource
    Electronic Resource
    SKIN TEMPERATURE OVER A HEAT SOURCE: EXPERIMENTAL STUDIES AND THEORETICAL CALCULATIONS (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 335 (1980), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1980.tb50765.x
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  • 5
    Electronic Resource
    Electronic Resource
    Charged-particle multiplicity distribution in 100-GeV/c $$\bar pd$$ and π− interactions (1980)
    Springer
    The European physical journal 5 (1980), S. 265-274 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present data on $$\bar pn$$ and π− n collisions obtained from an exposure of the 30′' FNAL deuterium filled bubble chamber to a mixed $${{\bar p} \mathord{\left/ {\vphantom {{\bar p} {\pi ^ - }}} \right. \kern-\nulldelimiterspace} {\pi ^ - }}$$ beam with a momentum of 100 GeV/c. We find that in 17±2% of the collisions with the antiproton there is an interaction on the spectator while for the collisions with π− mesons the corresponding number is 15±2%. The $$\bar pn$$ and π− n multiplicity distributions have average charged multiplicities of 6.46±0.07 and 6.53±0.08 respectively. The average multiplicities for both types of interactions are slightly smaller than those for the corresponding reactions on hydrogen by an amount that is the same as observed at other energies. As an estimate of $$\bar pn$$ annihilation we have calculated the difference $$\sigma _n (\bar pn) - \sigma _n (pn)$$ for each prong numbern. We find an average multiplicity of 9±1, a value close to that for $$\bar pp$$ annihilation at the same energy. combining our data with lower energy $$\bar pn$$ annihilation data, we observe that the average negative multiplicity is systematically larger than that for $$\bar pp$$ annihilation similar to the difference between neutron and proton target data with other beam projectiles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01557812
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  • 6
    Electronic Resource
    Electronic Resource
    Statistical model for π, ϱ,f and ω production in antinucleon-nucleon annihilation (1980)
    Springer
    The European physical journal 4 (1980), S. 323-332 
    Details
    ISSN: 1434-6052
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The statistical model of Orfanidis and Rittenberg has been modified to take into account ϱ,f, and ω production in antinucleon-nucleon annihilation. Fractions of resonance production in different channels as well as moments and multiplicity distributions can be predicted over the available energy range. The results are compared with experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01421574
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  • 7
    Electronic Resource
    Electronic Resource
    Stronger association with HLA-Cw6 than with corneodesmosin (S-gene) polymorphisms in Swedish psoriasis patients (2000)
    Springer
    Archives of dermatological research 292 (2000), S. 525-530 
    Details
    ISSN: 1432-069X
    Keywords: Keywords Cw6 ; HLA antigens ; Linkage ; disequilibrium ; Psoriasis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Psoriasis vulgaris is strongly associated with certain human leukocyte antigens, especially in early onset. The purpose of this study was to study the HLA-Cw6 allele and its contribution to disease susceptibility in a set of 104 families with at least two affected siblings. A sequencing method was utilized to examine the two exons that build up the antigen binding site of the C locus receptor. DNA from patients homozygous for Cw6 based on haplotype information were sequenced. The results confirmed the identity of the Cw6 allele in affected individuals with the consensus sequence for Cw*0602. We screened the set of families for psoriasis patients homozygous for Cw6 and found 11 individuals with a mean age at onset of 16.1 years. The corresponding figure for the Cw6 heterozygotes was 18.45 years and for the Cw6-negatives 22.36 years. This is indicative of a gene dose effect. We performed a transmission disequilibrium test (TDT) on the Cw6 allele per se, used as a biallelic marker. The analysis resulted in a P-value of 5.3 × 10–17 (t167/nt45). This greatly exceeds our previous results of a TDT in the region, including microsatellite markers and single nucleotide polymorphisms (SNPs) in the coding part of the S gene (corneodesmosin), which is a suggested candidate gene in the region. The maximum nonparametric linkage (NPL) value was also reached using HLA-C as a marker. We conclude that Cw6 is the allele which shows the highest degree of association with psoriasis in our set of families and we propose that it directly influences the age at onset of the disease rather than increasing the genetic load in accordance with a polygenic theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004030000175
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  • 8
    Electronic Resource
    Electronic Resource
    Pharmacokinetics of chlorambucil in man after administration of the free drug and its prednisolone ester (prednimustine, Leo 1031) (1983)
    Springer
    European journal of clinical pharmacology 24 (1983), S. 251-253 
    Details
    ISSN: 1432-1041
    Keywords: chlorambucil ; prednimustine ; plasma concentrations ; bioavailability ; pharmacokinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The pharmacokinetics of chlorambucil has been investigated in a cross over study after oral administration of the free drug (10 mg) and its prednisolone ester (prednimustine, 100 mg). The bioavailability of chlorambucil was about five times lower when given as prednimustine as compared to administration of the free drug. The peak plasma concentration was about twice as high and it was obtained more rapidly when the free drug was given. No intact prednimustine could be detected in plasma.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00613827
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  • 9
    Electronic Resource
    Electronic Resource
    Are nest characters of importance when choosing a male in the fifteen-spined stickleback (Spinachia spinachia)? (2000)
    Springer
    Behavioral ecology and sociobiology 48 (2000), S. 229-235 
    Details
    ISSN: 1432-0762
    Keywords: Key words Fifteen-spined stickleback ; Spinachia spinachia ; Female choice ; Nest ; Characters
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Male fifteen-spined sticklebacks (Spinachia spinachia) build their nests by wrapping epiphytic algae around macroalgae and securing them with secretional threads. In this study, I show that female fifteen-spined stickleback prefer males which have built their nests above the surrounding vegetation. High-located nests are safer, because they are less likely to attract egg-predators such as shore crabs (Carcinus maenas). Thus, I found that shore crabs more rapidly find eggs in nests built close to the bottom than in nests well above the it. Moreover, male-male competition could be an additional explanation as to why males build nests high up. Thus, my field results suggest that the closer the males were to a neighbour, the higher they built. Larger males were also found to have larger territories but male size did not correlate with the height of the nest above the surrounding vegetation. Females showed no preference for nest size, regardless of the presence of egg-predators. However, they tended to choose nests that had no egg-predators in the vicinity over nests with egg-predators close by. Female choosiness for certain nest characters may provide one explanation for the evolution of male care in this species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002650000230
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  • 10
    Electronic Resource
    Electronic Resource
    Aggregated Estimation of the Basic Parameters of Biological Production and the Carbon Budget of Russian Terrestrial Ecosystems: 1. Stocks of Plant Organic Mass (2000)
    Springer
    Russian journal of ecology 31 (2000), S. 371-378 
    Details
    ISSN: 1608-3334
    Keywords: biological production ; phytomass stock and density ; forest ecosystems ; bogs ; grasslands and brushwoods ; farmlands ; carbon stock
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The data presented were obtained at the first stage (1993–1999) of studies on evaluating the basic parameters of biological production in Russian terrestrial ecosystems in order to provide information for assessing and modeling the carbon budget of the entire terrestrial biota of the country. Stocks of phytomass (by fractions), coarse woody debris, and dead roots (underground necromass) were calculated by two independent methods, which yielded close results. The total amount of phytomass in Russian terrestrial ecosystems was estimated at 81 800 Tg (=1012 g = million t) dry matter, or 39 989 Tg carbon. Forest ecosystems comprise a greater part (82.1%) of live plant organic matter (here and below, comparisons are made with respect to the carbon content); natural grasslands and brushwoods account for 8.8%; the phytomass of wetlands (bogs and swamps), for 6.6%; and the phytomass of farmlands, for only 2.5%. Aboveground wood contains approximately two-thirds of the plant carbon (63.8%), and green parts contain 9.9%. For all classes of ecosystems, the proportion of underground phytomass averages 26.7% of the total amount, varying from 22.0% in forests to 57.1% in grasslands and brushwoods. The average phytomass density on lands covered with vegetation (1629.9 million hectares in Russia) is 5.02 kg/m2 dry matter, or 2.45 kg C/m2. The total amount of carbon in coarse woody debris is 4955 Tg C, and 9180 Tg C are in the underground necromass. In total, the vegetation of Russian terrestrial ecosystems (without litter) contains 54 124 Tg carbon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026631523999
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