In this paper, we shall determine the complete list of irreducible quadrangulations of the Klein bottle. By this result, we can easily list all the minorminimal 2-representative graphs on the Klein bottle. Moreover, we shall show that any two bipartite quadrangulations of the Klein bottle with at least 10 vertices are transformed into each other by a sequence of diagonal slides and a sequence o...

The cleanliness of feeding bottles is vital for child health (1, 2). Because of versatile, light, sturdy, reusable, and cost-efficient, plastic bottles, rather than conventional glass bottles are increasingly being utilized in the reusable feeding bottles. Although the machine cleaning of bottles in the food industry has been established (3, 4), the results may not pertain to the cleaning condu...

Baby bottles are often made of polycarbonate plastic. Impurities remaining in the bottle from the monomer bisphenol A can migrate from the plastic bottles into baby food, thereby causing a health concern. Previous migration testing of new baby bottles showed only trace migration levels of the substance. In the present work, polycarbonate baby bottles were subjected to simulated use by dishwashi...

We studied diurnal and daily variations in triple oxygen isotopes in the euphotic zone of the Sagami Bay during summer 2003 and 2004. There were sharp changes in physical processes, driven by changes in wind speeds, during the study period. Mixed-layer 17D anomalies were negatively correlated with wind speeds, whereas dissolved oxygen (DO) and chlorophyll a (Chl a) were positively correlated, s...

Flavor is one of the most important characteristics and qualities wines fruit wines. In this study, HS-GC-IMS combined with analytical method principal component analysis (PCA) were used to inquire volatile compounds in cherry wine during fermentation aging bottle. The fingerprints flavor substances established by topographic plots, identified 36 signal peaks that corresponded 29 compounds. mai...

This article clarifies the quantitative relationship between vertical greening, indoor ventilation, and oxygen content in high-rise buildings, with aim of determining values for a high-oxygen-content threshold to assess ventilation greening buildings. The index could be provided architects assist sustainable design offers an effective, convenient, environmentally friendly oxygen-content-testing...