Alcohol use disorder is a serious health problem in college students. Alcohol Use Disorders Identification Test (AUDIT) is a 10-item screening tool to assess alcohol consumption, drinking behaviors, and alcohol-related problems. AUDIT-C is a short version of AUDIT, consisting of consumption items 1-3. However, the optimal cutoff values of AUDIT and AUDIT-C for detecting excessive drinking are not available for Japanese college students. The aim of this study was to evaluate the validity of cutoff points of AUDIT and AUDIT-C for detecting moderate drinking, heavy drinking and binge drinking among Japanese college students. The cross-sectional study was based on an anonymous, self-administered questionnaire. In January 2017, we sampled college students and graduate students aged 20 years or older during annual health examinations at Mie University in Japan. Two thousand students underwent health examinations, and the eligible subjects were 1,600, including 152 (9.5%) moderate drinkers, 58 (3.6%) heavy drinkers and 666 (41.6%) binge drinkers. ROC (receiver operating characteristic) curve analysis showed that the optimal cutoff values for moderate drinking, heavy drinking and binge drinking were 5, 8 and 5 for men and 4, 7 and 4 for women in AUDIT; and 4, 7 and 4 for men and 4, 7 and 4 for women in AUDIT-C, respectively. Moderate drinking is considered unsafe drinking. Therefore, the optimal cutoff values for moderate drinking (5 for men and 4 for women in AUDIT and 4 for both sexes in AUDIT-C) are important parameters for prevention of alcohol use disorder in Japanese college students.

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Objective This study retrospectively explores the objective signs of imminent suicide risk in psychiatric in-patients.

Design The study analysed the diagnostic and nursing records of a psychiatric hospital that covered the last 14 days before the suicide attempts of 18 people, who, between March 2008 and July 2019, were found to have died by suicide during their hospital stay.

Methods Three professionals used a fishbone diagram to separately identify the factors that led to each person’s suicide, the objective signs that indicated imminent suicide risk, possible preventive strategies, and other observations. They compared their findings and used the KJ method (Kawakita Jiro Method) to categorise the items on which they all agreed.

Results Objective signs of imminent suicide risk were condensed into five categories: ‘signs emanating from the patient’, ‘signs gleaned through engagement’, ‘signs from response to treatment’, ‘signs associated with reports from the family’, and ‘signs inferred from multiple sources of information’. Five categories describing issues with the way in which the hospital staff handled information were extracted, namely ‘omission in diagnostic records during admission’, ‘omission in conference records’, ‘communication lapse during transfer’, ‘need for integrated information’, and ‘systemic issues’.

Conclusions The findings offer insights on assessing suicide risk and preventing suicide.

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Japan has a high suicide mortality rate compared to other developed countries. To reduce suicide mortality in Japan, it is important to systematically analyze factors related to death of patients with suicide attempt. This study aimed to analyze the characteristics of patients with suicide attempt, and the factors related to their death using the Diagnosis Procedure Combination (DPC) data— a nationally representative inpatient database. We collected 81,407 cases of suicide attempt from 2016 to 2018 from DPC data and performed a multilevel logistic analysis of factors associated with death discharges. The analysis results showed that patients who received psychiatric liaison care had a lower mortality rate, but only 0.6% of surviving patients received psychiatric liaison care after admission. The odds ratio (OR) of death was high for hanging (28.86; p < 0.001) and jumping (16.28; p < 0.001), compared to wrist cutting. Patients without a psychiatric diagnosis were more likely to choose means such as hanging (14.1%) than those with a psychiatric disorder. The weekend cases had a higher OR of death than weekday (Wednesday as reference) cases (Friday 1.14, p = 0.011; Saturday 1.60, p < 0.001; Sunday 1.67, p < 0.001). Based on these findings, we suggest that improving the availability and quality of psychiatric care in acute care hospitals and primary care settings, as well as enhancing the emergency department system on weekends, could help reduce the mortality of suicide attempts.

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Diesel exhaust (DE) is one of the major air pollutants in the world. DE disrupts steroid hormone levels, which may result from the disruption of spermatogenesis. Steroidogenesis occurs not only in the testis but also in the brain. Therefore, we investigated the effects of nanoparticle-rich DE (NR-DE) on steroidogenesis in both the testis and hippocampus. Exposure to NR-DE at concentrations comparable to the environmental standard for particulate matters 2.5 (PM_2.5) in Japan increased plasma testosterone level. This exposure increased the expression levels of genes involved in steroidogenesis in the testis, but not in the hippocampus, suggesting that NR-DE disrupts steroid hormone balance. This finding suggests the need to reconsider the environmental limit of PM_2.5 in Japan.

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Granulation tissue which is responsible for root resorption of deciduous tooth lies between root of the deciduous tooth and its permanent tooth germ. This tissue is called “root resorbing tissue”. Its bone-resorbing activity was investigated in vitro. Bovine root-resorbing tissue was cultured in close contact with 45Ca-labeled dead calvaria of rats. Bone-resorbing activity was determined by measuring 45Ca released from labeled calvaria during culture. It was found that only the root-resorbing tissue which was rich in odontoclasts and had a good blood supply in its surface layer had bone-resorbing ability, and that bone resorption occurred only when it was placed in close contact with calvarium. The root resorbing tissue which was poor in odontoclasts and blood vessels failed to stimulate bone resorption. Bone resorption by the root-resorbing tissue was enhanced markedly by 25-hydroxy-vitamin D3 or heparin, but not by larger amounts of parathyroid hormone, vitamin D3, and dihydrotachysterol when added to the culture.

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Several reports have suggested that semen quality in normal men is declining. Given the lack of consensus about the effects of diesel exhaust (DE) on the male reproductive system, we conducted various experiments. We examined the effect of the exposure of mature male mice to DE for 6 months on the male reproductive system. Daily sperm production per gram from the testes dose-dependently decreased with exposure to DE. Next, we investigated the effect of exposure of pregnant mice to DE on male gonad development at the level of mRNA expression. Expression of mRNAs for steroidogenic factor (Ad4BP/SF-1) and Müllerian inhibiting substance (MIS) decreased significantly in male fetuses when maternal mice were exposed to DE for 8 hr per day between days 2 and 13 post coitum. In addition, DE exposure during the fetal period may have some influence on the male reproductive function in newborn mice. In utero DE exposure caused testosterone levels to increase in newborn male mice at age 4 weeks. These findings indicate that exposure to DE may influence the male reproductive system. Further studies are necessary to elucidate the mechanism of the effects of DE on the male reproductive system and to define which classes of compounds are responsible for the changes in the male reproductive system.

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Xylooligosaccharides (XOS) and arabinoxylooligosaccharides (AXOS), potential prebiotics, can be produced from rice bran arabinoxylan (RBAX) using commercial endoxylanase enzymes. However, differences in rice bran cultivars and endoxylanase enzyme types may affect extracted oligosaccharides (OS) yields. This study investigated extracted OS structures derived from three different RBAX using two commercial endoxylanase enzymes. RBAX extracted from commercially defatted rice bran (CDRB) yielded the greatest OS amount (456.69 mg/g RBAX), followed by that of the San-Pah-Tawng1 (SPT1) cultivar (231.7 mg/g RBAX), and lastly, the Chai-Nat1 (CN1) cultivar (172.57 mg/g RBAX), as evidenced via Ultraflo L enzyme hydrolysis. Ultraflo Max enzyme hydrolysis produced a similar trend, however, OS amounts from all RBAX sources were remarkably lower (83.39 mg/g RBAX extracted from CDRB, 27.05 mg/g RBAX from SPT1 cultivar, and 21.53 mg/g RBAX from CN1 cultivar). Interestingly, 3²-αあるふぁ-L-Araf-(1-4)-βべーた-D-xylobiose (A³X) was the primary AXOS product in all RBAX hydrolysates prepared by Ultraflo Max. RBAX extracted from CDRB solubilized by Ultraflo L (45.67% weight of RBAX) had higher OS yields than that obtained via Ultraflo Max (8.3% weight of RBAX). Ultraflo L was therefore a suitable commercial enzyme for short-chain OS conversion from RBAX.

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乳腺にゅうせん分泌ぶんぴつ癌がんの穿刺せんし吸引きゅういん細胞さいぼう診みにおける特徴とくちょう的てきな所見しょけんについて報告ほうこくした. 穿刺せんし吸引きゅういんにより得えられた腫瘍しゅよう細胞さいぼうは核かく異こと型がたに乏とぼしく, 細胞さいぼう質しつは豊富ほうふで淡あわく, 細胞さいぼう像ぞうのみからは悪性あくせいと判断はんだんすることは容易よういではない. しかし,(1) 細胞さいぼう質しつに空そら胞や粘液ねんえきを有ゆうする.(2) 2～数すう個この腫瘍しゅよう細胞さいぼうが粘液ねんえきを取とり囲かこんだ構造こうぞう物ぶつを形成けいせいする.(3) この構造こうぞう物ぶつはときに立体りったい的てきに集あつまって出現しゅつげんする. などの特徴とくちょう的てきな細胞さいぼう所見しょけんを示しめすことから, 穿刺せんし吸引きゅういん細胞さいぼう診みでの乳腺にゅうせん分泌ぶんぴつ癌がんの術じゅつ前ぜん診断しんだんは可能かのうであると考かんがえられる.

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乳腺にゅうせんの分泌ぶんぴつ癌がんは別名べつめい若年じゃくねん性せい癌がんともよばれ,乳癌にゅうがん取扱とりあつかい規約きやくにも記しるされているが,まだその報告ほうこくは非常ひじょうにまれである.今回こんかい筆者ひっしゃらは,穿刺せんし吸引きゅういん細胞さいぼう診みにて特徴とくちょう的てきな所見しょけんを呈ていした成人せいじんの乳腺にゅうせん分泌ぶんぴつ癌がんを経験けいけんしたので報告ほうこくする.
症例しょうれいは55歳さい女性じょせいで,右みぎ乳腺にゅうせん腫しゅ瘤こぶを主おも訴に来院らいいんした.触診しょくしんでは右みぎ乳房ちぶさBED領域りょういきに1.5cm大だいの弾性だんせい硬かた,境界きょうかい明瞭めいりょうで可動かどう良好りょうこうな腫しゅ瘤こぶを触さわ知ちしたが,皮膚ひふ変化へんかは認みとめず,腋窩えきかリンパ節ぶしも触さわ知ちしなかった.超ちょう音波おんぱ検査けんさでは,腫しゅ瘤こぶ触さわ知ち部ぶに一致いっちして境界きょうかい鋭するど,不整ふせい型がたで内部ないぶエコーはほぼ均一きんいつな低ていエコー像ぞうを認みとめた.マンモグラフィーでは,触診しょくしんと同おなじ部位ぶいに,径みち1.7cmの辺あたり縁えんやや不明瞭ふめいりょうな円形えんけい腫しゅ瘤こぶ陰影いんえいを認みとめたが,微細びさい石灰せっかい化か像ぞうは明あきらかではなかった.以上いじょうの所見しょけんより乳癌にゅうがんを疑うたがい,穿刺せんし細ほそ胞診を行おこなった結果けっか,Class Vで右みぎ乳癌にゅうがん(T1N0 M0)と診断しんだんし,非ひ定型ていけい乳房ちぶさ切除せつじょ術じゅつを施行しこうした.
細胞さいぼう診み所見しょけんでは,核かく小体こていの目立めだつ核かくを有ゆうする細胞さいぼうの重じゅう積せきないしシート状じょうの細胞さいぼう集しゅう塊かたまりがみられた.細胞さいぼう質しつは豊富ほうふで淡あわく空そら胞や粘液ねんえきを有ゆうしており,核かくは三日月みかづき型がたで偏在へんざいしているものも認みとめられた.これらの細胞さいぼう集しゅう塊かたまりはあたかも“ぶどうの房ぼう”様さまであった.
組織そしき所見しょけんでは,大小だいしょう不同ふどうの管かん腔を形成けいせいし,管かん腔内と細胞さいぼう質しつにPAS,Alcian-blue陽性ようせいの分泌ぶんぴつ物ぶつを認みとめた.また,腫瘍しゅようは間あいだ質しつに富とむscirrhosな像ぞうを呈ていし,一部いちぶで乳腺にゅうせん外がい脂肪しぼう組織そしきへの浸潤しんじゅんを認みとめた.以上いじょうの所見しょけんより乳腺にゅうせん分泌ぶんぴつ癌がんと診断しんだんした.
なお,腫瘍しゅよう組織そしき内ないER,PgRはともに陰性いんせいであった.術後じゅつご経過けいかは順調じゅんちょうで,現在げんざい再発さいはつの兆候ちょうこうはない.
分泌ぶんぴつ癌がんは.1966年ねんにMcDivitらが,腫瘍しゅよう細胞さいぼうが著名ちょめいな分泌ぶんぴつ像ぞうを示しめし,PAS陽性ようせい物質ぶっしつが細胞さいぼう内ない,腺せん房ぼう様さま腔内にみられる組織そしき学がく的てき特徴とくちょうを有ゆうする3歳さいから15歳さいの7例れいの若年じゃくねん性せい乳癌にゅうがんを最初さいしょ報告ほうこくした.しかし,1980年ねんにTavassoliらは,成人せいじんにおいても同様どうような組織そしき像ぞうを呈ていする乳癌にゅうがんを提示ていじし,若年じゃくねん者しゃのみにみられるものではないことを報告ほうこくした.筆者ひっしゃらが調しらべ得えた限かぎりでは,本邦ほんぽうでは14例れいの報告ほうこくがあるが,穿刺せんし吸引きゅういん細胞さいぼう診みについて述のべた報告ほうこくはほとんどみあたらない.Shinagawaらは最近さいきん,分泌ぶんぴつ癌がんの穿刺せんし吸引きゅういん細胞さいぼう診みにおいて,本ほん症例しょうれいにおいても認みとめられた“ぶどうの房ぼう”様さまの細胞さいぼう診み所見しょけんが特徴とくちょう的てきであることを述のべている.
本ほん疾患しっかんの予よ後ごに関かんしては,他たの乳癌にゅうがんより良好りょうこうという報告ほうこくもあるが,本邦ほんぽう報告ほうこく14例れいについてみてみると,42%にリンパ節ぶし転移てんいが認みとめられており,今後こんご症例しょうれいを重かさねて検討けんとうしていく必要ひつよう性せいがあると思おもわれる.

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The crystal and molecular structure of 4-hydroxy-2-oxo-1-pyrrolidineacetamide was determined by X-ray analysis. The molecular conformation found in the solid was compared with results of theoretical quantum mechanical calculations carried out by using an ab-initio method at the STO-3G level. Crystals (orthorhombic) of the studied nootropic agent were as follows : a=7.162 (6), b=8.852 (3), c=11.340 (8) Å ; Pbc2₁. The five-membered ring deviates from planarity, while the planes of the amide group and of the four atoms N (1)-C (1)-C (2)-C (4) are almost perpendicular in cis arrangement, with the 4-hydroxy group in the axial position. In the crystals, molecules are linked by two intermolecular hydrogen-bonds, namely O (3)…O (2) and N (2)…O (1), which are 2.77 and 2.92 Å long, respectively. Results of theoretical calculations indicate for the free molecule a twisted cis conformation, with the 4-hydroxy goup in the axial position, as the most preferred one. This appears to be determined by the intramolecular hydrogen-bond between the O (1) atom and amide group hydrogen atoms. The relative conformational energies indicate that several conformations about the minimum can be populated in the solution state. The geometry and conformational profile of the pharmacologically active investigated molecule were found to reproduce, with the exception of the puckered conformation of the fivemembered ring, those previously determined for the related analogous nootropic agent 2-oxo-1-pyrrolidineacetamide (piracetam), whose chemical structure differs only in the lack of the 4-hydroxy group in the β-position to the carbonyl group.

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Methyl esters of acetylene carboxylic acids (2 and 3), an α-bromo acid (4), and α, α-difluoro acids (5 and 6) were synthesized as analogues of the C-24 carboxylic acid which is an intermediate in the microbial degradation of sterol side chains, and these compounds were shown to be inhibitors of the degradation reaction.

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The purpose of this study was to compare the effects of zinc oxide-eugenol (ZOE) and calcium hydroxide/iodoform paste (Vitapex), as root canal filling materials in pulpectomy, on delaying the root resorption of primary molars without permanent successors. Animal models without permanent successors were surgically established in beagle dogs. Root resorption was observed via periapical radiographs. The onset of root resorption of primary mandibular molars without successors occurred later (p<0.05) than physiologic resorption. ZOE pulpectomy clearly delayed the root resorption of primary molars without permanent successors (p<0.05), whereas resorption of primary molars with Vitapex pulpectomy started at almost the same time as physiologic resorption. Compared with Vitapex, ZOE was a more effective root canal filling material in delaying the root resorption of primary molars.

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本ほん研究けんきゅうは,障害しょうがい幼児ようじの問題もんだい行動こうどうと母親ははおやのストレス認知にんち(育児いくじ負担ふたん感かん)の関連かんれん性せいについて明あきらかにすることを目的もくてきとした。調査ちょうさの参加さんか者しゃは,S県内けんないの障害しょうがい見み通園つうえん施設しせつ12施設しせつに通園つうえんする児この母親ははおや319人にんと養護ようご学校がっこう11校こうに在籍ざいせきする児この母親ははおや1,030人にんであった。調査ちょうさ内容ないようは児この属性ぞくせい(性せい,年齢ねんれい,学年がくねん,障害しょうがい,医学いがく的てき分類ぶんるい名めい,問題もんだい行動こうどう),母親ははおやの属性ぞくせい(年齢ねんれい,児この数かず,家族かぞく構成こうせい,就労しゅうろう),育児いくじ負担ふたん感かんとした。児この問題もんだい行動こうどうと母親ははおやの育児いくじ負まけ視し感かんの関係かんけいは,潜在せんざい変数へんすうを用もちいた重じゅう回帰かいきモデル(多重たじゅう指標しひょうモデル)を仮定かていし,構造こうぞう方程式ほうていしきモデリングを用もちいて,その因果いんがモデルの適合てきごう性せいと変数へんすう間あいだの関係かんけいの程度ていどを検討けんとうした。問題もんだい行動こうどうの母親ははおやの育児いくじ負まけ視し感かんに及およぼす影響えいきょうの程度ていどは,寄与きよ率りつで31.0 %であった。特とくに,結果けっかは問題もんだい行動こうどうの3つの因子いんしのうちの「感情かんじょう統制とうせい困難こんなん」の因子いんしが,育児いくじ負担ふたん感かんの4つの因子いんしのうちの「児こに対たいする拒否きょひ感情かんじょう」と「育児いくじに対たいする否定ひてい感情かんじょう」のふたつの因子いんしにより関係かんけいしていることが示唆しさされた。以上いじょうの結果けっかを基礎きそに,問題もんだい行動こうどうにどのように専門せんもん家かが対処たいしょすべきかについて討論とうろんした。

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The aim of the study is to evaluate if the occupational exposure to urban pollutants could cause alterations on 17-alfa-hydroxy-progesterone plasma levels and related diseases in male traffic policemen. 17-α-OH-P is synthesized in Leydig cells and in adrenals; it influences spermiogenesis, acrosoma reaction, testosterone biosynthesis, blocking of gonadotropin secretion; it regulates learning, memory and sleep. After excluding principal confounding factors, i.e., rotating or night shifts, exposure to solvents, paints and pesticides during time-off and smoking, traffic policemen were matched with controls by age, working life and drinking habit. Finally, 112 traffic policemen and 112 controls were included in the study. In traffic policemen 17-α-OH-P mean values were significantly higher vs. controls. The distribution of 17-α-OH-P values in both groups was significant. An increased frequency of fertility disorders referred to the questionnaire items were found in traffic policemen vs. controls, but the difference was not significant. The occupational exposure to low doses of chemical urban stressor, interacting with and adding to the psychosocial ones, could alter plasma 17-α-OH-P concentrations in traffic policemen vs. controls. 17-α-OH-P could be used as an early biological marker, even before the onset of the reproductive and mental health diseases.

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A stereoselective synthesis of demethylgorgosterol (2) is described. Alkylation at the C-22 position of the steroidal 23-aldehyde (5) was achieved by Claisen rearrangement of the piperidine enamine to give the (22S)-22-aldehyde (10a) predominantly. Compound 10a was transformed to the 22-hydroxymethyl-24-aldehyde mesylate (15a). When the mesylate was treated with potassium t-butoxide, the 22, 23-cyclopropyl 24-aldehyde (19a) was obtained in high yield. An isopropyl group was introduced at the C-24 position by means of the Grignard reaction and subsequently the hydroxy group was oxidized to provide the 24-ketone (25a). Wittig reaction of 25a followed by hydroboration and then LiAIH₄ reduction of the mesylate gave 2, which was identical with the natural compound in all physical properties. Three other epimers, the (22R, 23R, 24S)-isomer (32), (22S, 23S, 24R)-isomer (34) and (22S, 23S, 24S)-isomer (35), were prepared by the same procedure. These four isomers can be separated by gas-liquid chromatography on a glass capillary column coated with OV-17.

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河原かわはらの生態せいたいリスク評価ひょうかは陸りく域いきおよび水域すいいきの生物せいぶつ多様たよう性せいを保全ほぜんするために必要ひつようである．河原かわら生せいの生態せいたいリスク評価ひょうかには，得えられる知見ちけんを生態せいたい学がく的てきに関連かんれんづける上うえで，河原かわはらに棲息せいそくする種たねを用もちいることが重要じゅうようである．本ほん研究けんきゅうの目的もくてきは，銅どうをモデル化学かがく物質ぶっしつとして，日本にっぽんの河原かわらに見みられるカザリゲトビムシ属ぞくの一種いっしゅ（Isotomurus cf. qinpuensis）を用もちいた回避かいひ試験しけんの実行じっこう可能かのう性せいを調しらべることである．感受性かんじゅせいと試験しけん成果せいかを比較ひかくするために，標準ひょうじゅん回避かいひ試験しけんで用もちいられているオオフォルソムトビムシ（Folsomia candida）を用もちいた回避かいひ試験しけんも行おこなった．その結果けっか，回避かいひ試験しけんは両りょう種たねとも妥当だとうなものとして行おこなうことができた．両りょう種たねにおいて，銅どうの濃度のうどが高たかくなるにともない回避かいひ率りつが高たかくなった．回避かいひ率りつの10% および50% 影響えいきょう濃度のうど （95% 信頼しんらい区間くかん） はそれぞれ，カザリゲトビムシ属ぞくの一種いっしゅにおいては0.8 （0.0–4.4）およ2821.0 （0.0–10,009.0）mg Cu/kg， オオフォルソムトビムシにおいては 0.7 （0.0–1.7）および101.9 （42.1–161.8）mg Cu/kg であった．これらの結果けっかから，カザリゲトビムシ属ぞくの一種いっしゅを用もちいた回避かいひ試験しけんは実行じっこう可能かのうであることが示しめされた．河原かわはらの生態せいたい学がく的てき関連かんれん性せいの高たかい生態せいたいリスク評価ひょうかを行おこなうためには，本ほん種たねを用もちいた回避かいひ試験しけんが利用りようされることが期待きたいされる．本ほん種しゅの飼育しいく系けいを確立かくりつし生態せいたいを解明かいめいすることで，本ほん種たねを用もちいた試験しけんの利便りべん性せいが高たかまると考かんがえられた．

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森林しんりん内ないにおける大気たいき中ちゅうガス・粒子りゅうし相しょう多た環たまき芳香ほうこう族ぞく炭化たんか水素すいそ（PAHs）の同時どうじ観測かんそくに適てきした試料しりょう採取さいしゅ法ほう及およびその迅速じんそく前ぜん処理しょり法ほうの開発かいはつを行おこなった．捕と集あつまり装置そうちは，粒子りゅうし捕と集あつまり用ようサンプラー，新規しんき開発かいはつしたガス状じょうPAHs捕と集あつまり用ようカートリッジ〔内径ないけい35 mm，スチレンジビニルベンゼン共ども重合じゅうごう体たい樹脂じゅし（以下いかXAD-2）5.0 g〕及およびローボリウムポンプからなり，吸引きゅういん流量りゅうりょうは20 L/minとした．XAD-2からのPAHsの抽出ちゅうしゅつは，ジクロロメタンによる超ちょう音波おんぱ抽出ちゅうしゅつとし，その後ご，除じょ粒つぶ，濃縮のうしゅく及および分析ぶんせきを行おこなった．対象たいしょうとする8種しゅのPAHsの前ぜん処理しょり操作そうさに対たいする回収かいしゅう率りつは80～100％ であり，また，20分間ふんかん2回かいの超ちょう音波おんぱ抽出ちゅうしゅつにより95％ 以上いじょうの抽出ちゅうしゅつ効率こうりつを得えることができた．更さらに，開発かいはつしたカートリッジによる大気たいき中ちゅうガス状じょうPAHsの捕と集あつまり効率こうりつは，夏季かき・冬季とうきともに95％ 以上いじょうであった．本法ほんぽうを用もちいたFM多摩丘陵たまきゅうりょう（東京とうきょう都と八王子はちおうじ市し）内高うちだかさ約やく12 mのタワー上部じょうぶ，下部かぶでの観測かんそく結果けっかから，森林しんりんによる大気たいき中ちゅうPAHsの捕捉ほそく効果こうかは，粒子りゅうし相しょうPAHsよりもガス相しょうPAHsのほうが大おおきい可能かのう性せいが示唆しさされた．

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