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  • Polymer and Materials Science  (4)
  • Japanese serow (Capricornis crispus)  (2)
  • habitat  (2)
  • Bombyx mori (Insecta)  (1)
  • Engineering  (1)
  • Surface physics, nanoscale physics, low-dimensional systems
  • 1990-1994  (8)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Population dynamics of japanese serow in relation to social organization and habitat conditions. I. Stability of Japanese serow density in stable habitat conditions (1993)
    Springer
    Ecological research 8 (1993), S. 11-18 
    Details
    ISSN: 1440-1703
    Keywords: density stability ; habitat ; Japanese serow (Capricornis crispus) ; population dynamics ; social organization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The density of a Japanese serow (Capricornis crispus) population, which has been in stable habitat conditions and free from hunting and predation, was investigated by direct observation of serows at Kusoudomari (336 ha), Wakinosawa village, Aomori Prefecture, Japan, during 1977–89. The vegetation, composed of mature mixed forest ofThujopsis with deciduous trees (43.2%), secondary forest of deciduous trees (23.4%) and a plantation of coniferous trees (30.0%) showed little change during the study period. The serows were counted 17 times each winter for 14 consecutive years. The serow population maintained a stable density with a mean of 12.5 individuals km−2 (SD=1.4) ranging from 8.6 to 14.6 km−2. The ratio of the proportion of kids (〈1 year old) to serows more than 1 year old decreased, but density did not decrease during the study period. Though extremely severe winters with heavy snowfall in 1984–86 caused a decline in serow density, the density recovered within a few years. It was considered that the stability of the serow density resulted mainly from the stable food supply and the lack of human disturbance, such as forest cutting in the habitat. Stable population density for a long period is probably related to the social organization of the serow.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02348602
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  • 2
    Electronic Resource
    Electronic Resource
    Immunocytochemical localization of β-1,3-glucan recognition protein in the silkworm, Bombyx mori (1992)
    Springer
    Cell & tissue research 268 (1992), S. 431-437 
    Details
    ISSN: 1432-0878
    Keywords: Hemocytes ; Hemolymph ; Phenoloxidase ; β-1,3-glucan ; Bombyx mori (Insecta)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A monospecific antibody against β-1,3-glucan recognition protein (a 62 kDa protein) of the larval silkworm prophenoloxidase activating system was used to study the localization of the protein. Among tissues from 5th instar larvae, only hemocytes and plasma were shown to contain a 62 kDa polypeptide immunoreactive with the antibody. Ultra-thin sections of the hemocytes were stained by an indirect immunogold staining method. Labelling occurred in the granules and cytoplasm of granulocytes and in the spherules and cytoplasm of spherulocytes. It was most conspicuous in granules of granulocytes and uniformly labelled spherules of spherulocyte, whereas no labelling was evident in prohemocytes, plasmatocytes and oenocytoids. The results are discussed in relation to the mode of recognition of fungi as non-self in insect hemocoel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00319149
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  • 3
    Electronic Resource
    Electronic Resource
    Population dynamics of Japanese serow in relation to social organization and habitat conditions. II. Effects of clear-cutting and planted tree growth on Japanese serow populations (1993)
    Springer
    Ecological research 8 (1993), S. 19-25 
    Details
    ISSN: 1440-1703
    Keywords: clear-cutting ; density change ; habitat ; Japanese serow (Capricornis crispus) ; population dynamics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Population responses of Japanese serow (Capricornis crispus) to clear-cut logging and planted tree growth were studied by a direct count of the number observed in three areas, Takiyama (305 ha), Gentouziro (270 ha), and Tanokashira (324 ha), near Wakinosawa Village, Aomori Prefecture, Japan, during 1976–89. At Takiyama, a mature mixed forest ofThujopsis dolabrata var.hondai andFagus crenata decreased from 73 to 39% coverage of the area due to clear-cutting during 1978–83. The serow population maintained a relatively low stable density (3–6 individuals per km2) until 1985–87, and increased 5–10 years after the clear-cutting, reaching 9–10 km−2 in 1988. At Gentouziro and Tanokashira, young plantations of Japanese cedar (Cryptomeria japonica) covered about half of each area. The population densities between 1980 and 1983 were relatively high (14–19 km−2), but declined thereafter, reaching 10–14 km−2 in 1988–89. These results indicated that the density increase resulted from an improvement of food supply due to growth of scrub following the clear-cutting, and that the density decline resulted from a habitat change due to growth of planted Japanese cedar and a decrease in the food supply. In Wakinosawa Village, serow density began to increase 5–10 years after forest cutting, and the high population density, about three- or six-fold larger than that in mature forest, is expected to be maintained for about 20 years after logging.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02348603
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  • 4
    Electronic Resource
    Electronic Resource
    Dissociation of poly(allylammonium) cations in salt solutions (1990)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 28 (1990), S. 233-240 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Potentiometric titration in various 1-1 salt solutions was carried out to study the dissociation behavior of the poly(allylammonium) cation (PAAH+). The titration curves show that proton release from cationic PAAH+ is markedly suppressed by addition of simple salt and depends on the counterion species. From an analysis of the titration curves it is found that the electrostatic free energy change ΔGel upon the proton release is negative in all systems examined, and its absolute value decreases with increasing ionic strength of the medium. Also, at a constant added salt concentration (0.1 mol L-1) ΔGel depends significantly on the counterion species added and increases in the order $\[ {\rm ClO}_{\rm 4}^ - 〉 {\rm NO}_3^ - 〉 {\rm Cl}^ - 〉 {\rm Br}^ - 〉 {\rm SCN}^ - 〉 {\rm I}^ - . \]$ The value of ΔGel correlates well with the electron donor constant En of the counterions. The dissociation behavior of PAAH+ is discussed in terms of electrostatic interaction among the ionized groups on the chain, the charge shielding effect, and the ion-solvent interaction of the added counterions.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1990.090280209
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  • 5
    Electronic Resource
    Electronic Resource
    Association of hydrophobic counterions in aqueous solution of poly(allylammonium) chloride: Comparison between p-n-propylbenzenesulfonate and p-iso-propylbenzenesulfonate ions (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 32 (1994), S. 171-177 
    Details
    ISSN: 0887-6266
    Keywords: association of hydrophobic counterions in aqueous poly(allylammonium) chloride ; hydrophobicity and steric effect of alkyl groups on association of p-n-propylbenzenesulfonate and p-iso-propylbenzenesulfonate ions ; poly(allylammonium) cation ; conformation change and precipitation of ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The hydrophobic association behavior of p-propylbenzenesulfonate ions (n-PBS- and iso-PBS-) around poly(allylammonium) cation (PAAH+ was studied by absorption and 1H nuclear magnetic resonance (NMR) spectroscopy. In the presence of PAAH+Cl-, the broadening (hypochromism) of absorption band of PBS- were observed. In addition, all 1H NMR signals of PBS- exhibited up-field shift which resulted from the intermolecular ring current shift. These results indicate the hydrophobic association of negative PBS- around PAAH+. The hydrophobic association arises from the accumulation of counterions around the polyion, and is stabilized by the hydrophobic interaction between propyl groups and the stacking interaction between benzene rings. The association of iso-PBS- ions is rather weaker than that of n-PBS-, suggesting that the steric hindrance of isopropyl groups prevents an effective association of hydrophobic counterions. Furthermore, through viscosity and Cl- activity measurements, it was found that the binding of associated PBS-,s to PAAH+ causes the change of its surroundings to hydrophobic character and its conformation. © 1994 John Wiley & Sons, Inc.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1994.090320120
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  • 6
    Electronic Resource
    Electronic Resource
    Counterion binding to poly(allylammonium) cation (1992)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 30 (1992), S. 587-590 
    Details
    ISSN: 0887-6266
    Keywords: poly(allylammonium) cation, counterion binding to ; ion activity in aqueous poly(allylamine) hydrochloride, binding and selectivity in ; polyelectrolytes, counterion binding and selectivity in solutions of ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Chloride ion activity coefficients in aqueous solutions of poly(allylamine) hydrochloride (PAA · HCl) have been determined both in the absence and the presence of simple salts. Without added salt, the activity coefficient depends on the polymer concentration. With added salt, the binding of added counterions by PAAH+ is evaluated from the release of chloride ion. The extent of interaction between counterions and PAAH+ at a given polymer concentration decreases in the order SO42- ≫ ClO4- 〉 NO3- 〉 Cl- 〉 Br- 〉 I-. This order of counterion selectivity agrees with the previous estimation of potentiometric titrations. The result shows that the hydration of the counterion, as well as its charge, plays an important part in counterion binding to the polyion.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1992.090300610
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  • 7
    Electronic Resource
    Electronic Resource
    Application and development of synthetic polymer membranes. VI. Pervaporation of aqueous ethanol solution through quaternized poly[3-(N′,N′-dimethyl) aminopropylacrylamide-co-acrylonitrile] membranes (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 43 (1991), S. 2021-2032 
    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: Membranes obtained from polymers, quaternized poly[3-(N′,N′-dimethyl) aminopropylacrylamide-co-acrylonitrile]s, showed selective separation of water from aqueous ethanol solution by pervaporation. The separation factor toward water reached over 15,000. Membrane performance showed a good correlation to membrane polarity. Differential scanning calorimetric melting endotherms of the water-swollen membranes were studied to clarify the state of water in the membranes. The results suggested that there are two states of water in the membrane: bound and free. The higher the fraction of bound water in the membrane, clearly, the more preferentially was water permeated.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1991.070431109
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  • 8
    Electronic Resource
    Electronic Resource
    Unsteady thermal stress analysis in three-dimensional problems by means of boundary-element method (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Communications in Applied Numerical Methods 6 (1990), S. 535-542 
    Details
    ISSN: 0748-8025
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The boundary integral formulation for unsteady thermal stresses in three-dimensional quasi-static problems is proposed. It is shown that three-dimensional unsteady thermal stress problems can be solved easily without the volume integral by means of the thermoelastic displacement potential and the boundary-element method. It is also shown that the time integral can be easily carried out analytically. In order to investigate the accuracy of this method, unsteady thermal stress distributions for a cube are obtained.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cnm.1630060706
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