著者
手塚 雅勝 鈴木 弘美 鈴木 康夫 原 征彦 岡田 昌二
出版者
公益社団法人日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.43, no.5, pp.311-315, 1997-10-31
参考文献数
13
被引用文献数
10

The effects of catechins obtained from the hot water extract of green tea leaves on two human type-A influenza virus strains of Aichi/2/68 and PR/8/34 were studied. In this study, (-)-epicatechin (EC), (-)-epigallocatechin (EGC), (-)-epicatechin gallate (ECg), (-)-epigallocatechin gallate (EGCg), the crude catechins containing these catechins and (+)-catechin were used. Consequently it was observed that catechins used in this study had an inhibitory effect on the hemolytic activity to red blood cells induced by these two type-A virus strains under acidic conditions (pH 5.1 or 5.4) although they did not have an influence on the agglutination activity to red blood cells induced by the same virus strains. After incubation of (-)-ECg and (-)-EGCg with A/Aichi/2/68 virus, MDCK cells, virus-sensitive cells, were infected with the virus and the ability of virus proliferation was measured in terms of an index of the agglutination activity of the virus to red blood cells. The used two catechins, (-)-ECg and (-)-EGCg, inhibited the virus proliferation at concentrations of 100μg/ml and 50μg/ml, respectively. Furthermore, at a concentration of 2.0 mg/ml these two catechins were found to inhibit the activity of neuraminidase on the surface of the virus membrane by 71.3% and 60.8%, respectively. From the above-mentioned results, it is considered that among the catechins contained in green tea leaves, such two catechins as (-)-ECg and (-)-EGCg inhibit the activity of neuraminidase present on the surface of human influenza virus in order to block the invasion of the influenza virus into virus-sensitive cells.
著者
永野 隆夫 渡辺 与八郎 本間 達二 祐田 泰延 山本 丈夫
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.24, no.4, pp.182-186, 1978-08-31 (Released:2008-05-30)
参考文献数
8
被引用文献数
1 2

Effect of chlorella, which contained cadmium in its cells, designated as cadmium-containing chlorella, on rats was studied and the following facts were found : 1) When the cadmium-containing chlorella was administered to rats orally for 10 days, no significant difference in body weight from control rats was observed. However, in the case of repeated oral administration of cadmium chloride, the growth of rats was impeded significantly. 2) Cadmium concentration in organs of rats after administration of cadmium-containing chlorella for 10 days was significantly lower than that of rats administered cadmium chloride. 3) Cadmium concentration in blood after single oral administration of cadmium chloride (10 mg/kg) or cadmium-containing chlorella (10 mg/kg) was examined, and 119 ng/ml blood was found 3 hr after cadmium chloride was given but only little cadmium was detected in blood after cadmium-containing chlorella was given. 4) Urinary excretion of cadmium from cadmium-containing chlorella was significantly faster than that of rats administered cadmium chloride.
著者
山本 郁男 吉村 英敏
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.28, no.5, pp.233-248, 1982-10-30 (Released:2008-05-30)
参考文献数
117
被引用文献数
2 1

This review is concerned primarily with our recent papers which have been published or presented since 1978. Especially, metabolic conversion of Δ8-THC to Δ8-THC-11-oic acid and to 8α, 9α-epoxyhexahydrocannabinol (8α, 9α-EHHC) and their pharmacological implications are described. Liver microsomes catalyze formation of 11-OH-Δ8-THC from Δ8-THC, 11-oxo-Δ8-THC from 11-OH-Δ8-THC, and 8α, 9α-EHHC from Δ8-THC. The involvement of cytochrome P-450 in these reactions were suggested in vivo as well as in vitro. 11-OH-Δ8-THC was detected and determined as a metabolite in vivo of Δ8-THC in the liver and brain of mice. 11-OH-Δ8-THC, when administered to mice, showed higher distribution in the brain as compared with Δ8-THC. Pharmacological activities of 11-OH-Δ8-THC, 11-oxo-Δ8-THC, Δ8-THC-11-oic acid, 8α, 9α-EHHC, 8β, 9β-EHHC, 9α, 10α-EHHC and 8β, 9α-di OH-HHC were compared with that of Δ8-THC using mice. Pharmacological effect of 11-OH-Δ8-THC, 11-oxo-Δ8-THC, 8β, 9β-EHHC and 9α, 10α-EHHC were more potent than that of Δ8-THC in the cataleptogenic, hypothermic, pentobarbital-induced sleep prolonging, and anticonvulsant effects. Daily administration of 11-OH-Δ8-THC or 11-oxo-Δ8-THC as well as Δ8-THC quickly induced tolerance to their hypothermic and pentobarbital-induced sleep-prolonging effects. The LD50s of 11-OH-Δ8-THC, 11-oxo-Δ8-THC and Δ8-THC-11-oic acid are larger than that of Δ8-THC.
著者
KAZUTA OGURI SACHIKO WADA SHUICHI ETO HIDEYUKI YAMADA
出版者
The Pharmaceutical Society of Japan
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.41, no.4, pp.274-279, 1995-08-31 (Released:2008-05-30)
参考文献数
5
被引用文献数
18 21

The specificity and mechanism of the Scott reaction for cocaine screening were studied. This reaction consists of three procedures : 1) addition of cobaltous thiocyanate/glycerol, 2) addition of hydrochloric acid, and then 3) mixing the solution with chloroform. Our experiment using 30 drugs showed that the precipitate-forming reaction of the first step above was not specific for cocaine. However, the color reaction using the three steps was highly specific for cocaine, at least in the test using low amounts (<1.0 mg) of drugs. Promazine, promethazine, chlorpromazine, imipramine, lidocaine and diltiazem showed positive reaction when 5 mg or more of these drugs were used. These findings indicated that the specificity of the Scott reaction is markedly affected by the amount of a drug used. The stoichiometric study indicated that cocaine binds to cobaltous thiocyanate at a molar ratio of 2 : 1. Based on this finding together with the specificity of the Scott reaction, we postulated a structure of cocaine-cobaltous thiocyanate.
著者
丸山 節子
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.44, no.1, pp.17-24, 1998-02-28 (Released:2008-05-30)
参考文献数
24
被引用文献数
1 1

In Nagano Prefecture, in the period of January to March, 1997, sudden deaths of Bombycilla spp. birds happened in many places, amounting to 13 places with the total death of 187 birds. Of the places, Shimosuwa Town, Komoro City, and Iida City were selected to be inquired into the cause of the sudden deaths. In the case of Shimosuwa Town, the esophagus was choked with nuts of Pyracantha, and cyanide was detected in the content from the esophagus at 10.0 μg/g (average) and in the content from the stomach at 17.0 μg/g (average), suggesting that cyanide or nitrile glycoside would be one of the causes of the deaths. In the case of Komoro City, EPN, an organophosphorus pesticide, was detected from the content in the stomach at 5960 μg/g (average) and from the liver at 11.4 μg/g (average), suggesting that EPN would be a many cause of the death. In the case of Iida City no cause of the death has been known.
著者
中原 雄二
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.36, no.2, pp.100-108, 1990-04-28 (Released:2008-05-30)
参考文献数
10
被引用文献数
1 1

World trends and problems of amphetamine and methamphetamine abuse, were described. Since the world seizures of the controlled drugs such as opiates, heroin, cocaine, cannabis and other psychotropic substances have rapidly increased in recent years, the author focused on the world-wide spread of amphetamine abuse. The world seizure of stimulant including amphetamines in 1987 has increased by 5-6 fold over in 1982. The trends of amphetamine abuse in many countries were summarized and this report pointed out the past and present problems of amphetamine abuse in U.S.A., Sweden, and Japan. In west coast regions of U.S.A., methamphetamine abuse has surprisingly spread in recent years. The increases of clandestine laboratory have become a big problem in US western states. The trends of amphetamine abuse patterns were introduced. Because of the great risk of acquired immunodeficiency syndrome with intravenous injection drug use, abuse patterns have been changing from injection to inhalation of amphetamines. About a new smokable methamphetamine, so-called "ice", its chemical and pharmacological characters were discussed and its toxicity also described. Additionally, concerning psychotropic drugs chemically and pharmacologically similar to amphetamines, their histories and hallucinogenic activities were described. In paticular, the epidemiologic topics of 3, 4-methylenedioxymethamphetamine (MDMA) called the rivival of LSD was described.
著者
中原 雄二
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.36, no.2, pp.100-108, 1990
被引用文献数
1

World trends and problems of amphetamine and methamphetamine abuse, were described. Since the world seizures of the controlled drugs such as opiates, heroin, cocaine, cannabis and other psychotropic substances have rapidly increased in recent years, the author focused on the world-wide spread of amphetamine abuse. The world seizure of stimulant including amphetamines in 1987 has increased by 5-6 fold over in 1982. The trends of amphetamine abuse in many countries were summarized and this report pointed out the past and present problems of amphetamine abuse in U.S.A., Sweden, and Japan. In west coast regions of U.S.A., methamphetamine abuse has surprisingly spread in recent years. The increases of clandestine laboratory have become a big problem in US western states. The trends of amphetamine abuse patterns were introduced. Because of the great risk of acquired immunodeficiency syndrome with intravenous injection drug use, abuse patterns have been changing from injection to inhalation of amphetamines. About a new smokable methamphetamine, so-called "ice", its chemical and pharmacological characters were discussed and its toxicity also described. Additionally, concerning psychotropic drugs chemically and pharmacologically similar to amphetamines, their histories and hallucinogenic activities were described. In paticular, the epidemiologic topics of 3, 4-methylenedioxymethamphetamine (MDMA) called the rivival of LSD was described.
著者
佐藤 健二 伊藤 宣夫 岡 充
出版者
公益社団法人日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.13, no.5, pp.281-284, 1967

Braid silk sutures (size, 2-0) pretreated or non-pretreated with silicone (Toshiba Co., TSF 484) were subjected to gamma radiation and effects of irradiation on the tensile strength and the solubility of the sutures were investigated. On the other hand, grafting and water repellent degree of the sutures grafted by silicone with gamma irradiation, were compared with those of the siliconized sutures by heating. The tensile strength of the sutures were decreased with increasing radiation dose, but no difference was observed between the decreasing degree of the strength of the sutures irradiated at sterilization dose (2.5 Mrad) and that of the sutures autocraved. No significant decrease was observed in the water repellent of the grafted sutures for long boiling and for immersion in storage solution (ethanol or carbolic acid). It seems to be promissing to produce silicone grafted sutures sterilized by irradiation.
著者
神津 公
出版者
公益社団法人日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.28, no.2, pp.111-113, 1982-02-28

Caffeine and sodium benzoate were determined by high performance liquid chromatography with a UV detector by use of stainless column (4.0 mm×0.15 m) packed with Nucleosil _5C_<18>. Mobile phase was M/30 KH_2PO_4+M/30 Na_2HPO_4・2H_2O-methanol (70 : 30). The sample was dissolved in 20% aqueous methanol. Determination was carried out successfully by using antipyrine as an internal standard and by maintaining the temperature at 40℃. The recovery of sodium benzoate and caffeine from synthetic mixtures were 97.2±1.0% and 99.8±1.1%. This method was applied to three kinds of pharmaceutical preparations. The contents of sodium benzoate and caffeine were 48.4-50.1% and 49.0-49.6%.
著者
平古 場朗 森木 弘樹 石橋 龍吾 森本 昌宏
出版者
公益社団法人日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.18, no.5, pp.342-346, 1972
被引用文献数
1

An examination was made on the sensitive spectrophotometric determination of ammonia-nitrogen in water. Ammonia was determined indirectly by measuring the blue complex produced by reaction with potassium iodide-starch reagent and chloramine compound, which was formed by the reaction of ammonia and hypochlorite at pH 5.4. Unreacted hypochlorite was destroyed with ferrous sulfate before addition of potassium iodide-starch reagent. The absorbance of developed color of the blue complex was measured at 570 mμ. The method was applicable for the determination of ammonia-nitrogen in the range of 0.01 to 0.4 ppm, at between 21 and 26°. The standard deviation was 2.2% on an average absorbance 0.496 of a sample containing 0.2 ppm of ammonia-nitrogen.
著者
橋本 嘉幸 鈴木 康男
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.26, no.6, pp.275-285, 1980-12-31 (Released:2008-05-30)
参考文献数
90
被引用文献数
1 1

This article reviews the present status of knowledges with respect to the chemical mutagens in the environment. Literatures on environmental mutagens were surveyed with positive results noted in natural products, food additives, smoking, food contaminants and chemicals resulted from environmental pollutants. Test systems detecting these chemical mutagens are summarized, and the advantage and limitation of its relevant use for the detection method of chemical carcinogens are discussed.
著者
森田 邦正 松枝 隆彦 飯田 隆雄
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.43, no.1, pp.42-47, 1997-02-28 (Released:2008-05-30)
参考文献数
27
被引用文献数
4 5

The present paper presents the liver distribution and fecal excretion of polychlorinated dibenzo-p-dioxins (PCDDs) congeners, such as 1, 2, 3, 7, 8-P5CDD, 1, 2, 3, 6, 7, 8-H6CDD, 1, 2, 3, 7, 8, 9-H6CDD and 1, 2, 3, 4, 6, 7, 8-H7CDD, in male rats fed with Chlorella, Spirulina and chlorophyllin. The objective of this study is to evaluate the effect on PCDD excretion by the chlorophyllin foods. The rats were given some treatment diets containing 20% Chlorella. 20% Spirulina, 0.2, 2% chlorophyllin, 10% rice-bran fiber or 0.2% chlorophyllin + 10% rice-bran fiber for 5 d. Then, the animals were administered 4 g of each diet containing 0.5 ml of the causal rice-bran oil of Yusho that had occurred in the Southwest part of Japan in 1968 and kept on the same diet for another 5 d. The rice-bran oil contaminated with 1, 2, 3, 7, 8-P5CDD (6.86 ng/ml), 1, 2, 3, 6, 7, 8-H6CDD (31.4 ng/ml), 1, 2, 3, 7, 8, 9-H6CDD (22.4 ng/ml) and 1, 2, 3, 4, 6, 7, 8-H7CDD (121.7 ng/ml) was used for the animal experiments. PCDD congeners in the feces and liver were analyzed by high resolution gas chromatography-mass spectrometry. The fecal excretion of 1, 2, 3, 7, 8-P5CDD in the groups fed with Chlorella, Spirulina and 2% chlorophyllin were 7.4, 7.1 and 11.0 times higher (p<0.01), respectively, than that in the control group. Moreover, the fecal excretion of 1, 2, 3, 6, 7, 8-H6CDD, 1, 2, 3, 7, 8, 9-H6CDD and 1, 2, 3, 4, 6, 7, 8-H7CDD in the same groups were 4.4-5.3, 2.7-3.7 and 1.7-2.8 times higher, respectively, than that in the control group. These findings suggest that administration of Chlorella, Spirulina and chlorophyllin is useful as a new approach in the treatment of patients exposed to lipophilic xenobiotics.
著者
吉岡 義正 小瀬 洋喜 佐藤 孝彦
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.32, no.4, pp.308-311, 1986-08-31 (Released:2008-05-30)
参考文献数
7

The LC50 test method by use of Tubifex was developed for the evaluation of eco-toxicity of chemicals. The change of the observation period, the size of Tubifex or the test temperature affected little the LC50 value of 3, 5-dichlorophenol. Acute toxicity of 20 chemicals was tested at 20°C for 48 h by use of Tubifex of 30-50 mm in length. The test results were compared with the other three biological test methods ; EC50 of activated sludge respiration inhibition test, LC50 of Oryzias latipes (Himedaka ; red killifish) acute toxicity test and EC50 of Tetrahymena pyriformis proliferation inhibition test. A good correspondence was found in each two test method compared, and the regression analysis showed that the sensitivity of the Tubifex test lied between those of activated sludge and O. latipes tests.
著者
平山 晃久 山口 昌史 中田 哲誌 奥村 美和 山崎 智美 渡辺 徹志 福井 昭三
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.35, no.4, pp.303-306, 1989-08-31 (Released:2008-05-30)
参考文献数
7
被引用文献数
6 7

0.1% NH2OH (2.5 ml), 5 N HCl (2.5 ml) and 1% m-aminophenol solution (1 ml) were added to unsaturated fatty acid methyl enters (10 mg), and the mixture was heated in a boiling water bath at 100°C for 20 min. The reaction mixtures were measured for their fluorescence intensity at Ex. 356 nm and Em. 505 nm, and the amounts of acrolein formed were determined from its calibration curve. Methyl linolenate oxidized for 20 h at 80°C, 2258.2μg/g of acrolein were formed, whereas 208.1μg/g of malondialdehyde were determined by the thiobarbituric acid method. Thus the determination of acrolein in oxidized lipid may have some fundamental significance for the evaluation of lipid oxidation. It was of interest that acrolein is formed not only from glycerin and triglyceride but also from unsaturated fatty acids by their autoxidation.
著者
沢野 俊彦 田中 [トル] 井上 哲男
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.11, no.3, pp.202-206, 1965-09-30 (Released:2008-05-30)
参考文献数
2

Recently, public bath houses which are provided with the circulating purifier are increasing in the Yokohama City. In this report, effects of the circulating purifier on the chemical pollution of bath water were investigated. Fifteen public bath houses in the city were selected, and the water was examined. The following results were obtained. The attached purifiers showed a remarkable effect on the turbidity and color of bath water. About the consumption of permanganate and the quantity of urea, the degree of pollution increased with the number of bathers, but the effect of the purifier was considerable.
著者
渡辺 和人 山本 郁男
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.38, no.5, pp.385-396, 1992-10-31 (Released:2008-05-30)
参考文献数
133

Marihuana is a complex mixture containing various biologically active compounds in which cannabinoids are major components. The drug interaction of marihuana with other drugs is a serious problem in some cases since marihuana is often taken with other centrally-acting drugs. Tetrahydrocannabinol (THC), which is a main component responsible for most of the psychomimetic effects of marihuana, can potentiate the effects of many depressants, such as alcohol, barbiturates, anesthetics, morphine and anticonvulsants, in the central nervous system. The drug interaction of THC with other drugs is a functional mechanism in the central nervous system. THC has biphasic effects (stimulant and depressant) depending on, maily, doses. THC, therefore, interacts with stimulants as cocaine and phencyclidine in a complicated manner. Cross-tolerance in some effects of the components of marihuana and of other drugs has been recognized. Cannabidiol (CBD), which is another major component in marihuana but lacks psychomimetic activity, potentiates the effects of some specified drugs that terminates their effects through metabolic inactivation. The interaction of CBD with other drugs is considered to be metabolic in origin since the cannabinoid can suppress the gepatic microsomal drugmetabolizing enzymes. Drug interaction can also occur among cannabinoids, indicating the complexity of the combined effect of marihuana and other drugs. These are additives, synergistic or antagonistic, depending on the conditions used. This review describes the interactions of marihuana components with centrally-acting drugs in relation to their pharmacological and toxicological significance.
著者
山本 耕司 鶴保 謙四郎 細川 守 山本 攻
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.27, no.5, pp.278-284, 1981-10-31 (Released:2008-05-30)
参考文献数
10
被引用文献数
1

In order to elucidate the effect of fiber reinforced plastics (FRP) for water works on the water quality, the time course of elution of organic matters from FRP test pieces was investigated and the free available chlorine consumption by test pieces was also studied. Total organic carbon (TOC) of the water, in which test pieces were immersed, was regarded as the amount of organic matters eluted from test pieces to water. The amount eluted to distilled water was propotional to the surface area of test pieces, and entirely dependent on the water temperature. The similar tendency was observed in the amount of styrene contained in the eluted organic matters. Gel filtration of the eluate showed that the organic matter contained high molecular weight substances. The organic matter was also eluted from the test pieces which had been washed with tap water during 12 months. The chlorine had no effect on the elution profile of organic matters from test pieces. The time course of elution of styrene, however, showed a time lag in the presence of chlorine. The styrene reacted with the chlorine in water and the product was 1-phenyl-2-chloroethanol. The chlorine consumption by test pieces, however, was not able to be estimated by the amount of eluted styrene. A linear relationship existed between the decrease of chlorine and the square root of time. Its slope was propotional to the initial concentration of chlorine and the surface area of test pieces. The chlorine consumption by test pieces could be explained by the assumption that the diffusion of chlorine into the interface between test pieces and water was the rate-determining step.
著者
米谷 民雄 鈴木 資子 岩崎 恭子 久保田 浩樹 山田 隆
出版者
公益社団法人日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.42, no.3, pp.241-247, 1996-06-30
参考文献数
29
被引用文献数
1

Maltol is a food additive used worldwide, while it enhances the brain toxicity of aluminum (Al). Al injected with maltol is primarily transferred to the liver and so it may also cause hepatic injury. Kojic acid is used as a food additive in Japan and is structurally related to maltol. Therefore, the hepatotoxicity of Al with maltol was compared to that of Al with kojic acid in mice. Al injected intravenously with maltol in a 1 : 4 molar ratio at a dose of 0.25 mmol Al/kg caused an increase in the plasma activities of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) despite lower hepatic Al concentration than those found after administration in a 1 : 2 molar ratio and with Al only. At the same time, hepatic phosphorus and sulfur (S) levels decreased. The decrease in the S level was ascribed to that in the taurine content. The increase in urinary taurine was also observed. Al alone, maltol alone, or Al : kojic acid at a ratio of 1 : 4 did not alter the plasma activities of AST and ALT or the hepatic element levels. These findings may suggest that tris (maltolato) aluminum (III) (Al (maltol)_3) is a hepatotoxin.
著者
市川 勇 松村 年郎
出版者
公益社団法人 日本薬学会
雑誌
衛生化学 (ISSN:0013273X)
巻号頁・発行日
vol.43, no.3, pp.162-173, 1997-06-30 (Released:2008-05-30)
参考文献数
18
被引用文献数
4

Since the end of 1960s, with an increase in the economic growth, a large amount of chemical products made from fossil fuel have been used. In addition to the development and the modification of the products for building materials containing many kinds of hazardous chemicals, the techniques for the airtight construction of houses have been remarkably developed. In the latter half of 1970s, among people living in U.S.A. and northern Europe a new syndrome with headache, dizziness, and eye irritation, etc., which was later called as a sick building syndrome (SBS), has emerged. This syndrome was found to be caused by concentrated multiple pollutants such as volatile organic compounds (VOCs) and allergens from fungi and ticks in high airtight rooms with lower ventilation. Recently, the number of patients suffering from biological allergens and VOCs tends to increase. But in Japan the standard values we have in the law on the sanitary management for buildings are limited to those for such three materials as carbon dioxide (CO2), carbon monoxide (CO) and suspended particulate matter (SPM). Therefore, we describe in this report the necessity of the establishment of a new law on the indoor environmental standards for the prevention of our health against some kinds of indoor pollutants such as VOCs in cluding formaldehyde, nitrogen dioxide (NO2), ozone (O3) and asbestos produced not only in offices and working places but also in houses.