Analysis of water distribution in delipidated human hair by small-angle neutron scattering (SANS).

Objective: It is known that damaged hair has a part of its internal structure damaged, and its water absorption and desorption behavior are different. In recent years, it has been reported that internal lipids play an important role in the adsorption and desorption of water to the hair. Therefore, we investigate whether the water distribution in hair and the amount of internal lipids are related.

Paternal postnatal depression in Japan: an investigation of correlated factors including relationship with a partner.

Background: A negative effect of paternal depression on child development has been revealed in several previous studies. The aims of this study were to examine the prevalence and relevant factors associated with paternal postnatal depression at four months postpartum, including age, part-time work or unemployment, experience of visiting a medical institution due to a mental health problem, economic anxiety, unexpected pregnancy, pregnancy with infertility treatment, first child, partner's depression, and lower marital relationship satisfaction.

Methods: We distributed 2032 self-report questionnaires to couples (one mother and one father) with a 4-month old infant between January and April 2013.