著者
野口 大介
出版者
日本科学教育学会
雑誌
日本科学教育学会年会論文集 = Proceedings of the Annual Meeting of Japan Society for Science Education (ISSN:21863628)
巻号頁・発行日
vol.44, pp.259-260, 2020-08-25

全国の高校生によって発表された最近の化学研究テーマは従来の枠組みの区分には収まらない多様なものが増加する傾向にある.高校化学で学ばれることになる新たな項目「化学が果たす役割」に適合しうる先端的なテーマがある一方で,プラスチック(合成高分子)の再利用をテーマとしたものはほとんど見当たらなかった.
著者
野口 大介
出版者
日本科学教育学会
雑誌
日本科学教育学会研究会研究報告 = JSSE Research Report (ISSN:18824684)
巻号頁・発行日
vol.34, no.3, pp.47-52, 2019-12-21

Copper dendrites exposed to a magnetic field of rare earth magnets in an electrolyzing aqueous solution of CuSO4 resulted in two things. Firstly, a precipitation around the cathode with swirling, and secondly, a growth while spinning around the cathode during the electrolyzing process if a vibration by hand was gently added to the cathode. If these phenomena become inquiring learning materials, it seems to be of significant value in secondary educational practice. In this report, it is shown that the different concentrations of solution change the form of copper dendrites. The lower one needs waiting for enough changing the form, on the other hand, the higher one causes collapse with too strong flow by the Lorentz force acting ions in the solution.
著者
野口 大介
出版者
日本科学教育学会
雑誌
日本科学教育学会研究会研究報告 = JSSE Research Report (ISSN:18824684)
巻号頁・発行日
vol.34, no.10, pp.23-28, 2020-06-20

高等学校化学においてよく取り上げられるナトリウムフェノキシド(NaOPh)の結晶構造データを取得し,その単分子および結晶中三次元構造を調査した。NaOPhのみからなる純結晶はNa2O2四角形単位を含む(Na2O2)nラダー型ポリマー構造を有しており,ユニークな三次元構造を形成している.一方,水和物結晶であるNaOPh・H2Oでは対イオンであるナトリウムイオンとともに水和されている様子が,さらにNaOPh・3H2Oでは結晶水によりナトリウムイオン対が解離して水に溶解したかのような状態が,それぞれ確認できる.その他の溶媒和結晶の構造からも,溶媒和に伴う(Na2O2)n構造の解離の様子が見られた.これら一連の流れを授業で効果的に展開することで,化学物質の構造や溶解現象を分子間相互作用と結び付けて生徒に理解させることが期待できる.
著者
野口 大介
出版者
長崎大学大学院工学研究科
雑誌
長崎大学大学院工学研究科研究報告 = Reports of Graduate School of Engineering, Nagasaki University (ISSN:18805574)
巻号頁・発行日
vol.50, no.95, pp.81-84, 2020-07

Photocatalyzed oxidation reaction of organic compound (methylene blue; MB) by using titanium(IV) oxide (TiO2) nanoparticles and wind power to stir the solution with uses a hand-made propeller was carried out. As a first, to check the degree of reaction rate, MB was added to the aqueous solution with TiO2 nanoparticles and UV (ultraviolet rays) irradiation that changes its color of MB gradually resulted in proceeding the oxidation reaction by O2 in air. After that, calibration curve was made using UV-vis spectrometer which was used to determine the concentration of MB in the solution measuring its absorbance. Then the UV condition was changed with and without UV. As a result, it was revealed that with UV condition, the reaction rates of oxidation of MB were faster than without UV. The wind condition to stir the solution was also revealed with unexpected result; i.e., “Weak-power” wind to stir the solution accelerated the reaction rather than “Middle-power” one. The reason stirring by middle-power wind couldn't accelerate the reaction so far is supposed that hand-made propeller used to stir the solution is not strong enough to convey the power under the condition.
著者
野口 大介 島田 旭
出版者
日本科学教育学会
雑誌
科学教育研究 = Journal of Science Education in Japan (ISSN:03864553)
巻号頁・発行日
vol.44, no.4, pp.321-327, 2020

Metal dendrites can be valuable learning materials for the visualization of the Lorentz force in chemical reactions; however, the appropriate experimental conditions for this purpose such as the voltage, reaction time, magnitude of magnetic field, and electrolyte solution concentration are not known. Hence, we conducted experiments to effectively visualize metal dendrite precipitation in a swirling shape due to the Lorentz force generated by the magnetic field and for use as practical teaching materials. The electrolysis was carried out at a voltage of 20 V, 15 V or 10 V for 1 or 2 min with 3 or 5 rare-earth magnets in piles and a CuSO4 aqueous solution with the concentrations of 0.050, 0.10, and 0.15 mol L–1. It was found that the magnetic field was increased using the magnets stacked, even though the effect decreased with increasing numbers of layers. To observe the shape of the metal dendrites under a magnetic field effectively in a short time, the concentration of the aqueous CuSO4 was determined to be 0.10 mol L–1. The magnetic field was increased using magnets in piles, even though the effect decreased with increasing numbers of layers. A copper wire was used repeatedly as the anode, and the mass of the copper participating in the reaction gradually decreased. The magnitude of the applied voltage was not sufficiently studied in this work, and will be investigated in future studies.
著者
野口 大介
出版者
長崎県生物学会
雑誌
長崎県生物学会誌 = Transactions of the Nagasaki Biological Society (ISSN:03874249)
巻号頁・発行日
vol.85, pp.39-41, 2019-12

A female Atypus karschii (25 mm long including chelicerae) was collected on the street in front of the Faculty of Education, Nagasaki University on July 16, 2019. From the chelicerae of it secreted colorless liquid that appeared to be a venom. Pyrolysis-GC/MS measurement revealed that the secreted liquid contained some components such as aliphatic and aromatic compounds. In addition, a burrow of Calommata signata (Araneae: Atypidae; Near Threatened) was also found nearby.
著者
野口 大介
出版者
一般社団法人 日本科学教育学会
雑誌
日本科学教育学会年会論文集 (ISSN:21863628)
巻号頁・発行日
pp.659-662, 2020 (Released:2020-11-27)
参考文献数
22

研究題材を豊富に提供してくれる造網性のクモを野外で観察したところ,クモの脱皮,網の形態,占座,および捕食に関して研究の題材になるかもしれない事例を見出した.図鑑や文献にはない生態を見出すことができた一方で,きちんとした研究へと深めていくには,さまざまな工夫が必要になるであろうとも感じられた.
著者
野口 大介
出版者
長崎県生物学会
雑誌
長崎県生物学会誌 = Transactions of the Nagasaki Biological Society (ISSN:03874249)
巻号頁・発行日
vol.86, pp.35-36, 2020-06-30

I report herein that the cases of fly, stilt bug, and ant in web of two spiders, long-jawed orbweaver Leucauge blanda (Araneae: Tetragnathidae) and trashline orbweaver Cyclosa sp. (Araneae: Araneidae). Insects those were supposed to be Sepsis monostigma (Diptera: Sepsidae) were captured in the web of L. blanda. On another web of L. blanda, an insect that was supposed to be Yemma exilis (Heteroptera: Berytidae) stayed. An ant supposed to be Paratrechina longicornis (Hymenoptera: Formicidae) was found in a detritus stabilimentum of Cyclosa sp.
著者
野口 大介
出版者
関西クモ研究会
雑誌
くものいと
巻号頁・発行日
vol.54, pp.41-51, 2021-03-25

The author reports some observational cases herein about spiders found from Nagasaki Prefecture in 2020. A juvenile of a running crab spider Philodromus subaureolus was collected from a leaf of Palmae gen. sp. Its molting was observed 4 days later. An individual of a wandering spider Orthobula crucifera was collected on azalea (Rhododendron sp.). The ant-mimicking spiders, Myrmarachne elongata and Myrmarachne japonica, were collected. A cannibalism of jumping spiders of Salticidae gen. sp. was observed on a flower of azalea. A male individual of Nurscia albofasciata was found on the street. Heteropoda venatoria (an introduced species) was aware in the author’s room of the apartment. An individual of Ebrechtella tricuspidata, one of crab spiders known as a sit-and-wait (ambush) predator, was upon a sunflower Helianthus annuus. An adult female cross spider Argiope amoena captured a large cicada Cryptotympana facialis. It was previously reported that individuals of the prey items foraged by A. amoena are mainly composed of Hymenoptera and Platypleura kaempferi, a small cicada, was the only species of Cicadoidea recorded as the prey of A. amoena. A crab spider Thomisus labefactus was on a leaf of Japanese knotweed Reynoutria japonicaat late September. An adult male trapdoor spider Latouchia typica, one of near threatened species, was found on a wall of the apartment. For near one year, the author had observed wasp spider Argiope bruennichi; an egg sac was discovered in the winter, some stabilimenta of vertical zigzag-lined and disc-shaped were found. Moreover, remarkable decorations such as mass-centered one and zigzag-lined combined with disc-shaped were also found. Molting and sexual cannibalism of them were observed and additionally, an alive individual was found in spite of in late December too.
著者
野口 大介
出版者
関西クモ研究会
雑誌
くものいと
巻号頁・発行日
vol.54, pp.10-40, 2021-03-25

The present review focuses on the chemoecology of spiders (Arachnida: Araneae). All cases of spider sex pheromones, kairomones, defensive and offensive chemical mimicries, and antimicrobial peptides reported previously in literature are described herein. Although ca. 49 thousand spider species are recognized globally, only 11 spider sex pheromones (contact or airborne) have only been identified from seven species. In addition, almost all the sex pheromones are released by females to attract males, while only one sex pheromone is released by males to appease females. To date, 17 spider species have been reported to have kairomones, which facilitate the searching and evaluation of prey. Chemical mimicry, which facilitates camouflage and protects against parasites in ant colonies, has also been observed among myrmecophile spiders. Additionally, aggressive chemical mimicry has been reported in bolas spiders, which attract moths using kairomones that mimic the sex pheromones of the targets. Four types of antimicrobial peptides that protect spiders from microorganisms have also been reported. Although some researchers have demonstrated the antimicrobial activities of spider web threads, the compounds responsible for the antimicrobial activity remain unclear. The chemoecology of spiders remains poorly understood considering their diversity; therefore, further studies are required in the future.
著者
野口 大介
出版者
一般社団法人 日本科学教育学会
雑誌
日本科学教育学会年会論文集 (ISSN:21863628)
巻号頁・発行日
pp.259-260, 2020 (Released:2020-11-27)
参考文献数
10

全国の高校生によって発表された最近の化学研究テーマは従来の枠組みの区分には収まらない多様なものが増加する傾向にある.高校化学で学ばれることになる新たな項目「化学が果たす役割」に適合しうる先端的なテーマがある一方で,プラスチック(合成高分子)の再利用をテーマとしたものはほとんど見当たらなかった.
著者
田中 穣 小松原 春菜 野口 大介 市川 健 河埜 道夫 近藤 昭信 長沼 達史 西出 喜弥
出版者
日本臨床外科学会
雑誌
日本臨床外科学会雑誌 (ISSN:13452843)
巻号頁・発行日
vol.77, no.8, pp.1873-1880, 2016 (Released:2017-02-28)
参考文献数
17
被引用文献数
3

目的:鼠径部ヘルニア術前CTの診断能について検討した.対象と方法:平成24年1月から平成27年12月までに腹腔鏡下鼠径ヘルニア修復術を行った鼠径部ヘルニア198例226病変を対象に,術前のCTにおけるヘルニア検出率と日本ヘルニア学会の鼠径部ヘルニア分類での分類診断率を検討した.結果:病変の検出率は92.9%と高率であったが,1cm未満の小さいヘルニアやCT撮影時の腹圧が不十分で脱出していなかった場合には検出困難な場合があった.ヘルニアの分類診断率では96.7%であり,I・II・III・V型では100%であったのに対し,IV型では30.0%と低率であって,また対側の不顕性ヘルニアの検出率は45.0%であった.結語:鼠径部ヘルニア術前のCTは病変検出率は高率であり,ヘルニア分類診断にも役立つものと考えられた.
著者
野口 大介
出版者
一般社団法人 日本科学教育学会
雑誌
日本科学教育学会年会論文集 40 (ISSN:21863628)
巻号頁・発行日
pp.419-420, 2016 (Released:2018-08-16)
参考文献数
3

本研究は,テルミット反応で鉄-アルミニウム合金が作り出せるという仮説を設定し,生徒が教科書で学ぶ基礎化学的事項を活用しそれを証明していく探究活動に関するものである。反応させるアルミニウム量を通常の1.7 倍にまで増やすと次第に生成物の質量は減少していき,それ以上となると逆に増加した。なお,生成物である鉄にアルミニウムが含まれることは,生成物を塩酸に溶かし,水酸化ナトリウム水溶液を過剰に加え,希塩酸を加えて水酸化アルミニウムが生成することで確認している。これらの結果から,鉄にアルミニウムが置き換わった合金様生成物,および内外にアルミニウムが積層・集合した生成物が生じるものと考察した。