Graphical representation and the similarity of DNA primary sequences

In this article, graphical representations of DNA primary sequences were generated. Topological indices and molecular connectivity indices were calculated and used for the comparison of similarities among eight different DNA segments. The satisfactory results were achieved by this analysis.

Theoretical representation of shear and pressure influence on the phase separation behavior of PVME/PS mixture

In the framework of lattice fluid model, the Gibbs energy and equation of state are derived by introducing the energy (E-s) stored during flow for polymer blends under shear. From the calculation of the spinodal of poly(vinyl methyl ether) (PVME) and polystyrene (PS) mixtures, we have found the influence of E., an equation of state in pure component is inappreciable, but it is appreciable in the mixture. However, the effect of E, on phase separation behavior is extremely striking. In the calculation of spinodal for the PVME/PS system, a thin, long and banana miscibility gap generated by shear is seen beside the miscibility gap with lower critical solution temperature. Meanwhile, a binodal coalescence of upper and lower miscibility gaps is occurred. The three points of the three-phase equilibrium are forecasted. The shear rate dependence of cloud point temperature at a certain composition is discussed. The calculated results are acceptable compared with the experiment values obtained by Higgins et at. However, the maximum positive shift and the minimum negative shift of cloud point temperature guessed by Higgins are not obtained, Furthermore, the combining effects of pressure and shear on spinodal shift are predicted.

EFFECT OF DENSITY ON LARVAL DEVELOPMENT AND FEMALE PRODUCTIVITY OF TISBE-HOLOTHURIAE (COPEPODA, HARPACTICOIDA) UNDER LABORATORY CONDITIONS

POPULATION-DYNAMICS; FOOD; FISH

Sex-linked microsatellite marker detected in the female gametophytes of Undaria pinnatifida (Phaeophyta)

P>In our microsatellite analysis of three male and three female gametophytes of Undaria pinnatifida (Harv.) Suringar, a microsatellite marker (part of the locus Up-AC-2A8, GenBank accession no. AY738602.1) was only polymerase chain reaction-amplified in three female gametophytes. This putative female-specific marker was further tested by the use of 32 male and 21 female gametophytes maintained in the Marine Biological Culture Collection Centre, China. In addition, three sporophytes were included for confirmation. Results showed that the marker was present in all of the female gametophytes and sporophyte cultures, but absent in all of the male gametophytes. To our knowledge, this is the first sex-related marker ever reported in U. pinnatifida. The discovery of this marker will accelerate gender identification and shed light on our understanding of the mechanisms of sex determination at a molecular level in this commercially important seaweed.

Representation of microscale ocean wavenumber spectrum correct to the second order

In this paper, the analytical representations of four wave source functions in high-frequency spectrum range are given on the basis of ocean wave theory and dimensional analysis, and the perturbation method is used to solve the governing equations of ocean wave high-frequency spectrum on the basis of the temporally stationary and locally homogeneous scale relations of microscale wave. The microscale ocean wavenumber spectrum correct to the second order has an explicit structure, its first order part represents the equilibrium between different source functions, and its second order part represents the contribution of microscale wave propagation.

亲子依恋对大学生人际关系影响的性别效应

Parent-child attachment refers to the emotional bond that forms between parent and child, which has great influences on the child’s interpersonal development. Present study applied both correlation method and secure attachment memory activation method to investigate the “gender relation effects” of parent-child attachment’s influences on college students’ close relationships, general attachment representation, and emotion and social loneliness. The basic hypotheses on “gender relation” were set as: “same-sex” parent-child attachment has more influences on college students’ “same-sex” interpersonal relationships, while “opposite-sex” parent-child attachment has more influences on college students’ “opposite-sex” interpersonal relationships. Major findings includes: 1. There was weak correlation of attachment security between father-child and mother-child relationships. The findings indicated that, among college students, the security of “opposite-sex” parent-child attachment representation is higher to some extent than that of “same-sex” parent-child attachment representation. 2. There were significant correlations between parent-child attachment and college students’ attachment anxiety in close relationships. Major findings indicated that “opposite-sex” parent-child attachment security negatively predicts college students’ attachment anxiety in both “same-sex” and “opposite-sex” close relationships. 3. Gender relation effects were significant in the correlations between parent-child attachment and college students’ level of avoidant attachment representation. “Same-sex” parent-child attachment security positively predicted avoidant attachment level in college students’ “same-sex” close relationships, while “opposite-sex” parent-child attachment security positively predicted avoidant attachment level in “opposite-sex” close relationships. 4. Parent-child attachment security memory activation had significant influences on college students’ general attachment representation, in which gender relation effects indicated that: the memory activation of father-child attachment security significantly increases participants’ security of self-model in general attachment representation to “male others”; while the memory activation of mother-child attachment security significantly increase participants’ security of others-model in general attachment representation to “female others”. 5. For male college students, father-son attachment security negatively predicted their emotion and social loneliness. For female college students, father-daughter attachment security negatively predicted their emotion loneliness, while mother-daughter attachment security negatively predicted their social loneliness. Attachment security memory activation had significant influences on college students’ social loneliness, in which gender relation effects was confirmed in that only father-child attachment security memory activation significantly decreased male participants’ level of social loneliness. The results indicated that gender relation effects are significant in the influences of parent-child attachment on college students’ interpersonal relationship representations, especially when the level of avoidant of attachment in college students’ close relationships was predicted by parent-child attachment representation, and when the memory activation of parent-child attachment influenced college students’ general attachment representation. The present study confirmed to some extent that gender relation consistency exists in attachment representations among different interpersonal relations, and serves as a new model for analysis of gender differences in the research fields. In the present study, however, gender relation effects were not confirmed in all the interpersonal relationship representations, which indicated the complexity in the problems of gender differences in the research fields of close relationships.