子どもを持ち仕事を続ける夫婦が執る育児・家事行動に関する研究(その1)

With recent increase in the employment rate of women, the numbers of women working after marriage and having babies are increasing. For management of their work and family life, the husband\u27s cooperation is indispensable. Studies on fathers have been recently increasing, but they are still are insufficient compared to those on mothers. In this study, we investigated the involvement of couples and their task share in childcare and housework using questionnaires of 135 couples whose children were cared for in 3 nurseries in Toyama Prefecture, and analyzed differences in recognition between fathers and mothers. Of the women in their 30s who cared for their children, the traditional concept of GENDER (husband dominance, man- dominance, work for men and housework for women) was considered to be wrong m 31.9% partially right in 59.3% largely right in 7.4%, and right in 1.5%. Their working types were part-time jobs (26.2%), self-employment (11.1%), and full-time jobs (62.2%). After day nurseries, some women asked their mother-in-law or own mother to care for their children, and a small number of mother utilized prolonged care in the nurseries. Husbands were found to be more involved in playing and chatting with children, cuddling, sending the children to the nurseries and collecting, and shopping than in order childcare and household work, but none of them reached the levels that their wives expected.近年, 女性の就業承が高まり, 結婚・出産後も継続して働く,人,が増えている.そのような中で女性が仕事と家庭をうまく両立させていくためには, 夫の協力が不可欠である.最近, 父親研究が脚光を浴びはじめたものの, 母親研究ほど十分には行なわれていない.本研究は, 富山県内3ヶ所の保育施設に子どもを預けている135組の夫婦の日常から両者の育児・家事への関わりと分担の実像を探り, それに対する両者間の認識について調査し, 分析したものである.その結果, 現在子育て中の30代の女性は, 『ジェンダー』(伝統的性別認識による夫中心, 男性上位, 男は仕事・女は家庭)に対する考え方について, 「全然思わない」と答えた人が31.9%, 「いくらかそう思う」人が59.3%, 「かなりそうだと思う」人が7.4%, 「全くそうだと思う」1.5%であった.母親の就業形態は, パート勤務が26.2%, 自営業が11.1%, フルタイム勤務の人が62.2%あり, この人たちは, 保育所終了後は夫の母や実家の母に子どもを見てもらっており, 少数だが延長保育を利用している人もあった.夫の育児・家事に関わる行動では, 子どもの遊びの相手や話し相手, 抱っこ, 保育園の送り迎えと買い物に比較的多く関わりが見られたものの, 妻の期待するレベルまでにはどの項目も到達していない状況にあることが分かった

Recovery of physiological traits in saplings of invasive Bischofia tree compared with three species native to the Bonin Islands under successive drought and irrigation cycles

Partial leaf shedding induced by hydraulic failure under prolonged drought can prevent excess water consumption, resulting in delayed recovery of carbon productivity following rainfall. To understand the manner of water use of invasive species in oceanic island forests under a fluctuating water regime, leaf shedding, multiple physiological traits, and the progress of embolism in the stem xylem under repeated drought-irrigation cycles were examined in the potted saplings of an invasive species, Bischofia javanica Blume, and three endemic native species, Schima mertensiana (Sieb. Et Zucc, ) Koitz., Hibiscus glaber Matsum, and Distylium lepidotum Nakai, from the Bonin Islands, Japan. The progress of xylem embolism was observed by cryo-scanning electron microscopy. The samples exhibited different processes of water saving and drought tolerance based on the different combinations of partial leaf shedding involved in embolized conduits following repeated de-rehydration. Predawn leaf water potential largely decreased with each successive drought-irrigation cycle for all tree species, except for B. javanica. B. javanica shed leaves conspicuously under drought and showed responsive stomatal conductance to VPD, which contributed to recover leaf gas exchange in the remaining leaves, following a restored water supply. In contrast, native tree species did not completely recover photosynthetic rates during the repeated droughtirrigation cycles. H. glaber and D. lepidotum preserved water in vessels and adjusted leaf osmotic rates but did not actively shed leaves. S. mertensiana exhibited partial leaf shedding during the first cycle with an osmotic adjustment, but they showed less responsive stomatal conductance to VPD. Our data indicate that invasive B. javanica saplings can effectively use water supplied suddenly under drought conditions. We predict that fluctuating precipitation in the future may change tree distributions even in mesic or moist sites in the Bonin Islands

A novel S-sulfhydrated human serum albumin preparation suppresses melanin synthesis

Products of ultraviolet (UV) irradiation such as reactive oxygen species (ROS) and nitric oxide (NO) stimulate melanin synthesis. Reactive sulfur species (RSS) have been shown to have strong ROS and NO scavenging effects. However, the instability and low retention of RSS limit their use as inhibitors of melanin synthesis. The free thiol at Cys34 on human serum albumin (HSA) is highly stable, has a long retention and possess a high reactivity for RSS. We report herein on the development of an HSA based RSS delivery system. Sulfane sulfur derivatives released from sodium polysulfides (Na2Sn) react readily with HSA. An assay for estimating the elimination of sulfide from polysulfide showed that almost all of the sulfur released from Na2Sn bound to HSA. The Na2Sn-treated HSA was found to efficiently scavenge ROS and NO produced from chemical reagents. The Na2Sn-treated HSA was also found to inhibit melanin synthesis in B16 melanoma cells and this inhibition was independent of the number of added sulfur atoms. In B16 melanoma cells, the Na2Sn-treated HSA also inhibited the levels of ROS and NO induced by UV radiation. Finally, the Na2Sn-treated HSA inhibited melanin synthesis from L-DOPA and mushroom tyrosinase and suppressed the extent of aggregation of melanin pigments. These data suggest that Na2Sn-treated HSA inhibits tyrosinase activity for melanin synthesis via two pathways; by directly inhibiting ROS signaling and by scavenging NO. These findings indicate that Na2Sn-treated HSA has potential to be an attractive and effective candidate for use as a skin whitening agent

Establishing the Japan-Store House of Animal Radiobiology Experiments (J-SHARE), a large-scale necropsy and histopathology archive providing international access to important radiobiology data

Purpose: Projects evaluating the effects of radiation, within the National Institutes of Quantum and Radiological Science and Technology (QST), National Institute of Radiological Sciences (NIRS), have focused on risk analyses for life shortening and cancer prevalence using laboratory animals. Genetic and epigenetic alterations in radiation-induced tumors have been also analyzed, with the aim of better understanding mechanisms of radiation carcinogenesis. As well as the economic and practical limitations of repeating such large-scale experiments, ethical considerations make it vital that we store and share the pathological data and samples of the animal experiments for future use. We are now constructing such an archive called the Japan-Storehouse of Animal Radiobiology Experiments (J-SHARE). Methods: J-SHARE records include information such as detailed experimental protocols, necropsy records and photographs of organs at necropsy. For each animal organs and tumor tissues are dissected, and parts are stored as frozen samples at -80 ˚C. Samples fixed with formalin are also embedded in paraffin blocks for histopathological analyses. Digital copies of stained tissues are being systematically saved using a virtual slide system linked to original records by barcodes. Embedded and frozen tissues are available for molecular analysis. Conclusion: Similar archive systems for radiation biology have been also under construction in the USA and Europe, the Northwestern University Radiation Archive (NURA), and STORE at the BfS, respectively. The J-SHARE will be linked with the sister-archives and made available for collaborative research to institutions and universities all over the world

Distribution of Polysulfide in Human Biological Fluids and Their Association with Amylase and Sperm Activities

Intracellular polysulfide could regulate the redox balance via its anti-oxidant activity. However, the existence of polysulfide in biological fluids still remains unknown. Recently, we developed a quantitative analytical method for polysulfide and discovered that polysulfide exists in plasma and responds to oxidative stress. In this study, we confirmed the presence of polysulfide in other biological fluids, such as semen and nasal discharge. The levels of polysulfide in these biological fluids from healthy volunteers (n = 9) with identical characteristics were compared. Additionally, the circadian rhythm of plasma polysulfide was also investigated. The polysulfide levels detected from nasal discharge and seminal fluid were approximately 400 and 600 μM, respectively. No correlation could be found between plasma polysulfide and the polysulfide levels of tear, saliva, and nasal discharge. On the other hand, seminal polysulfide was positively correlated with plasma polysulfide, and almost all polysulfide contained in semen was found in seminal fluid. Intriguingly, saliva and seminal polysulfide strongly correlated with salivary amylase and sperm activities, respectively. These results provide a foundation for scientific breakthroughs in various research areas like infertility and the digestive system process

Development of the Curriculum for the Connection Period of an Elementary School and a Junior High School : Through Teachers in Kindergarten Joining Classes at Elementary School

本研究は，幼稚園教員・小学校教員がそれぞれの校種の保育・授業に参観・参加し，それぞれの専門性を活かして交流することを通し，幼小接続期におけるカリキュラムの開発に向けた基礎的情報を得ることを目的とする。特に，本研究では幼稚園教員による１年生の授業参加を通して認識した共通点・差異点に着目する。研究の方法としては，幼稚園教員が小学校１年生の生活科・音楽科の授業にＴ２として参加し，他の幼稚園教員は参観する。その後，幼稚園教員に対して質問紙調査を実施した。また，生活科・音楽科の授業後に，幼稚園教員と小学校教員で授業参加に関する研究協議を実施した。結果としては，次の３点である。１点目は，ねらいによって，受容・共感の言葉がけやねらいに向けて展開していく言葉がけが必要である。２点目は，幼稚園教師は子どもの成長を見ており，小学校教師は子どもを教科の枠で見ていることに違いがあり，この点に関しては接続期において配慮することが必要である。３点目は，ねらいが幼小で同じようでも活動の展開の仕方に違いがあり，子どもの発達に応じて活動の展開を工夫することが必要である。The purpose of this study was to develop a connective curriculum between kindergarten and elementary school. To achieve this, the differences between kindergarten and elementary school teachers were investigated. Kindergarten teachers participated in a music or a human life and science class in a team teaching staff or as observers. After this experiences, participants were asked some open-ended questions. The main results are as follows: (1) it is important to express sympathy to and adoption of the aims and goals of the class a; (2) kindergarten teachers tend to focus on the growth of children, compared with elementary school teachers, who focus on the goal of the class; (3) there are differences in the ways of conducting teaching activities even when the aims of classes are same

双子家庭を対象とした妊娠期からの地域社会とつながる出産準備教室のプログラムと実践方法の検討

　厚生労働省の報告によれば、児童虐待相談件数は年々上昇して平成30年には過去最多となっている（厚生労働省，2019）。双胎妊娠は、虐待のハイリスクであり支援の必要性が高い。しかし、市川市内には多胎家族に特化した支援サービスや出産を取り扱う施設はない。このような背景を鑑み、2019年より市川市との包括協定連携事業の一つとして和洋女子大学看護学部の教員と市川市健康支援課及び市川市内子育て支援団体とが協力して双子家庭を対象とした出産準備教室を開始した。出産準備教室は病産院や行政で行われることが多く、主に単胎児を対象とした内容で行われる。そこで本研究では、虐待防止の観点から、双子家庭を対象とした妊娠期から地域とつながる出産準備教室のプログラムを検討することを目的とした。　出産準備教室に参加して研究の同意を得られた双子の両親17名を対象に無記名自記式質問紙による実態調査を行った。調査内容は、実施したプログラムに関して５段階の単純尺度を用いて満足度調査とした。また、その内容についての自由記載は質的記述的に分析を行った。その結果、夫は妊婦体験などの体験や科学的根拠を説明する講義により、父親として取るべき行動がイメージできるようなプログラムに満足を示していた。妻は、夫が双胎妊娠や双子の育児の大変さを理解してくれていることや、同じ双胎妊娠する仲間や地域の育児支援者とのつながりによる安心感を得るプログラムに満足していることが明らかとなった。本教室の実施プログラム内容は、いずれも満足度が高かった。今後は、参加者数を増やして統計的に分析していくことが課題である