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41.
Risa Kakimoto Masayoshi Ichiba Akiko Matsumoto Kunihiko Nakai Nozomi Tatsuta Miyuki Iwai-Shimada Momoko Ishiyama Noriko Ryuda Takashi Someya Ieyasu Tokumoto Daisuke Ueno 《Environmental science and pollution research international》2018,25(17):16309-16315
Risk assessment of infant using a realistic persistent organic pollutant (POP) exposure through breast milk is essential to devise future regulation of POPs. However, recent investigations have demonstrated that POP levels in breast milk collected from the same mother showed a wide range of variation daily and monthly. To estimate the appropriate sample size of breast milk from the same mother to obtain reliable POP concentrations, breast milk samples were collected from five mothers living in Japan from 2006 to 2012. Milk samples from each mother were collected 3 to 6 times a day through 3 to 7 days consecutively. Food samples as the duplicated method were collected from two mothers during the period of breast milk sample collection. Those were employed for POP (PCBs, DDTs, chlordanes, and HCB) analysis. PCB concentrations detected in breast milk samples showed a wide range of variation which was maximum 63 and 60% of relative standard deviation (RSD) in lipid and wet weight basis, respectively. The time course trend of those variations among the mothers did not show any typical pattern. A larger amount of PCB intake through food seemed to affect 10 h after those concentrations in breast milk in lipid weight basis. Intraclass correlation coefficient (ICC) analyses indicated that the appropriate sample size for good reproducibility of POP concentrations in breast milk required at least two samples for lipid and wet weight basis. 相似文献
42.
Platydemus manokwari is a broadly distributed invasive terrestrial flatworm that preys heavily on land snails and has been credited with the demise
of numerous threatened island faunas. We examined whether P. manokwari tracks the mucus trails of land snail prey, investigated its ability to determine trail direction, and evaluated prey preference
among various land snail species. A plastic treatment plate with the mucus trail of a single species and a control plate without
the trail were placed side by side at the exit of cages housing P. manokwari. All trials were then videotaped overnight. The flatworms moved along plates with mucus trails, but did not respond to plates
without trails, blank control (distilled water), or with conspecific flatworm trails. When presented at the midpoint of a
snail mucus trail, the flatworms followed the trail in a random direction. The flatworms showed a preference when choosing
between two plates, each with a mucus trail of different land snail species. Our results suggest that P. manokwari follows snail mucus trails based on chemical cues to increase the chance of encountering prey; however, trail-tracking behavior
showed no directionality. 相似文献
43.
Taguchi Shigeru Hagiwara Moe Shibata Ayumi Fujinari Hiroaki Matsumoto Sayaka Kuwata Makoto Sazawa Kazuto Hata Noriko Kuramitz Hideki 《Environmental science and pollution research international》2021,28(11):13425-13438
Environmental Science and Pollution Research - Formaldehyde (HCHO) is a naturally occurring compound found in ambient air which can induce cancer and sick-building syndrome. It plays an important... 相似文献
44.
Mizukawa Mami Nishimura Noriko Uddin Md. Azhar Kato Yoshiei Uchida Yu-ichi 《Journal of Material Cycles and Waste Management》2023,25(4):2407-2416
Journal of Material Cycles and Waste Management - Si, Al, Cu, and Ag particles’ mixture which mainly composes pulverized silicon-based waste solar cells were individually separated by the... 相似文献