Social Dynamics of Japanese Immigrants in Aru Islands from Late 19th Century to Early 20th Century

Barium, zinc and strontium yellows in late 19th–early 20th century oil paintings

This work focuses on the study of the 19th century yellow chromate pigments based on barium (BaCrO4), zinc (4ZnCrO4·K2O·3H2O) and strontium (SrCrO4). These pigments, which are reported to shift in hue and darken, have been found in 19th century artworks. A better understanding of their historic manufacture will contribute to the visual/chemical interpretation of change in these colours. Researc...

Rivalry and Friendship in the Heterosexual Couple. Challenges to Discourses of Society in Late 19th and Early 20th Century Europe

the study of historical geography of gilanin 19th and early 20th century.

geographical situation of gilan province, its weather and suitable conditions for agriculture, plus its neighboring with russia, have prepared the way for cultural, political and economical relations and interchanges between iran and russia. being called “the gate of europe”, the province also receives many tourists from many countries, especially russia. many of these tourists have recorded de...

Mother's age and daughter's fecundity. An epidemiological analysis of late 19th to early 20th century family reconstitutions.

BACKGROUND At both ends of the female reproductive span, the risk of reproductive problems is increased. We hypothesize that this is partly explained by inadequate maturation of oocytes ('pre-ovulatory overripeness'). As this phenomenon has been shown to lead to gonadal anomalies in the offspring of animals, we tested the prediction that daughters of older and very young mothers more often suff...

Characterisation of 19th and 20th century Chinese paper

The chemical and physical properties of 19th and 20th century Chinese papers were investigated using a variety of material characterisation methods. A reference collection of 178 Chinese papers, dating from 1799 to 1990 was used, and properties such as pH, degree of polymerisation (DP), lignin content, and tensile strength (zero-span) were determined. Most of the papers were of approximately ne...