Separation Anxiety in Children and Adolescents

Dąbkowska, Małgorzata; Araszkiewicz, Aleksander; Dabkowska, Agnieszka; Wiłkość, Monika

doi:10.5772/22672

Cited by 8 publications

(6 citation statements)

References 144 publications

(121 reference statements)

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“…The hydration varies with temperature, and is associated with the area per lipid, which depends on the length and, more significantly, on the saturation of PC fatty acid chains. 23 The differences in composition of the aqueous phase, especially the content of salts 75 (the DAcPC was dissolved in water, PC liposome preparation may use salt solutions) or co-solvents, 75,76 decreases reliability of the estimations. 75 The area per lipid (A) can be most precisely determined by combining the x-ray and smallangle neutron diffraction data.…”

Section: Comparison With Published Datamentioning

confidence: 99%

Polarity of Hydrated Phosphatidylcholine Headgroups

et al. 2019

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The headgroup (H) stratum (sometimes called the polar region) of membrane bilayers is a relevant yet poorly understood solvation phase for small molecules and macromolecules interacting with the membranes. Solvation of compounds in bilayer strata is characterized experimentally by wideand small angle X-ray scattering, neutron diffraction, and various NMR techniques. The quantification is tedious and only available for a limited set of small molecules. Our recently published model of liposome partitioning of small molecules shows that solvation of compounds in the H-stratum of fluid phosphatidylcholine (PC) bilayers correlates well with their solvation in hydrated diacetyl phosphatidylcholine (DAcPC), and solvation in the core (C) depends in a similar way on that in n-hexadecane. These two correlations became a basis for a model describing the location of compounds in the H-and C-strata, and at the connecting interface, as a nonlinear function of the fragment solvation characteristics of the compounds. In this study, refractivity of hydrated DAcPC phases with varying water content was measured and polarity determined using steady-state fluorescence of indole and Nile Red. The results were compared with the published data obtained by other techniques for PC bilayers in liposomes or on solid supports. The demonstrated qualitative agreement, as well as the polarity and refractivity dependencies on the DAcPC concentration, support the suitability of hydrated DAcPC as the H-stratum surrogate. Interestingly, depending on hydrations typical for H-strata of fluid PC bilayers, the dielectric constant could decrease significantly, from 31.0 to 7.3 for 16 and 8 water molecules per headgroup, respectively. Although additional experiments are needed for a confirmation, this observation could help set proper dielectric constant magnitudes in continuum-based computational models of accumulation and crossing of the PC bilayers with varying hydration levels thanks to the temperature or the structure of fatty acid chains.

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Section: Comparison With Published Datamentioning

confidence: 99%

Polarity of Hydrated Phosphatidylcholine Headgroups

et al. 2019

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“…In the case of doped or incongruently melting crystals, where transport and, as a result, growth rate are limited by phenomena in the diffusion layer, stable growth and sustainability of the zone can only be achieved at much lower growth rate, typically between 0.1 and 2 mm/h. This usually has a negative effect on the quality of the crystal (e.g., Sr 2 RhO 4 [142]). Materials that evaporate have to be grown very quickly, sometimes in the range of 20-50 mm/h.…”

Section: Growth Conditionsmentioning

confidence: 99%

Floating Zone Growth of Oxides and Metallic Alloys

Dąbkowska

Dąbkowski

Hermann

et al. 2015

Handbook of Crystal Growth

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“…While truancy reflects non-attendance owing to antisocial behaviours or a lack of interest, school refusal reflects school non-attendance owing to emotional distress (Fremont, 2003). It is not considered a clinical diagnosis; rather, it is a symptom (Dabkowska, Dabkowska, Araszkiewicz, & Wilkosc, 2011). In many countries, both Eastern and Western, school refusal is a social issue that is stressful for students, families, and school personnel (e.g.…”

Section: Introductionmentioning

confidence: 99%

Variables affecting the school adaptation of secondary-school students who do not seek help: attachment, coping style, positivity, and prospects

Amai

2020

International Journal of Adolescence and Youth

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School refusal is a severe social issue in many countries. For helping students who experience stress, multiple social supports including school counsellors and teachers have been provided. However, these supports may not be useful for 'non-help-seekers'those who do not seek help even when they have serious problems. Given the scarce research on nonhelp-seekers' cognition, it is essential to identify internal factors that affect non-help-seekers' adaptation in school. The current study examined the associations between non-help-seekers' school adaptation and attachment, stress-coping style, and three psychological variables: trust, positivity, and prospects. Two cross-sectional studies (N = 960, 49.5% boys; N = 658, 51.8% boys, respectively) revealed the importance of attachment, a possibility of interventions to psychological factors, and the limited effect of stress coping strategies when a student's problem is severe. Several interventions including retrieval-induced forgetting and modelling were suggested as support for non-help-seekers before their problems become dire.

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Separation Anxiety in Children and Adolescents

Cited by 8 publications

References 144 publications

Polarity of Hydrated Phosphatidylcholine Headgroups

Polarity of Hydrated Phosphatidylcholine Headgroups

Floating Zone Growth of Oxides and Metallic Alloys

Variables affecting the school adaptation of secondary-school students who do not seek help: attachment, coping style, positivity, and prospects

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