Initial Isolation Distance Assessment of Inhalation Toxicity Hazardous Substances Based on the PHAST Program

2018 ◽  
Vol 6 (1) ◽  
pp. 71-75
Author(s):  
Hyun-Jung Jo ◽  
Yu Jin Chun ◽  
Yun Sang Jun ◽  
Seoweon Jo ◽  
Kyoung Hoon Han ◽  
...  
Keyword(s):  
Hazardous Substances ◽  
Inhalation Toxicity ◽  
Isolation Distance

Initial Isolation Distance Assessment of Inhalation Toxicity Hazardous Substances Based on the PHAST Program

2018 ◽  
Vol 6 (1) ◽  
pp. 71-75
Author(s):  
Hyun-Jung Jo ◽  
Yu Jin Chun ◽  
Yun Sang Jun ◽  
Seoweon Jo ◽  
Kyoung Hoon Han ◽  
...  
Keyword(s):  
Hazardous Substances ◽  
Inhalation Toxicity ◽  
Isolation Distance

scholarly journals TOXICOLOGICAL ASSESSMENT OF THE EXPOSURE TO SOME ARYLHETEROALKANECARBOXYLIC COMPOUNDS ON THE BODY

2019 ◽  
Vol 98 (7) ◽  
pp. 734-737
Author(s):  
Larisa G. Gorokhova ◽  
A. G. Zhukova ◽  
N. V. Kizichenko ◽  
A. S. Kazitskaya
Keyword(s):  
Experimental Studies ◽  
The Body ◽  
Hazardous Substances ◽  
Inhalation Toxicity ◽  
Class Iii ◽  
Hazard Class ◽  
Local Skin ◽  
Toxicological Assessment ◽  
Safe Level ◽  
Specific Species

Introduction. One of the current medical and social problems is the intoxication of the body of workers that occurs during the production of medicines in chemical-pharmaceutical enterprises. In this regard, it is necessary to substantiate and develop a hygienic rationing of the content of harmful substances in the air of the working area. Materials and methods. Toxicity parameters (1-benzylindol-3-yl-thio) acetic acid (BTAA) and tris-(2-hydroxyethyl) ammonium-1-benzylindol-3-ylthioacetate (VM-7-02) were studied. Experimental studies were conducted on outbred rats and mice, rabbits and guinea pigs. Using standard physiological, biochemical, hematological and morphological parameters, the effect of the substance on the experimental animals was evaluated. The parameters of acute inhalation toxicity of substances were determined during the experiment in the chamber for inhalation primers using spectrophotometry to analyze the amount of the substance in the air of the chambers. Processing and interpretation of the information obtained was performed using the software package “Statistic 10.0”. Results. In terms of mean lethal doses (DL50), both xenobiotics can be classified as moderately hazardous substances of hazard class III, and there are no specific species and sex differences in the sensitivity of animals to the substances under study. Local skin reaction and signs of resorption of substances through intact skin are absent. The irritant effect on the mucous membranes of the eyes of tris-(2-hydroxyethyl) ammonium-1-benzylindol-3-ylthioacetate can be classified as weak. The ability to material accumulation in the body of the compound VM-7-02 is medium: the cumulation coefficient is 3.7. At BTAA cumulative abilities are even weaker - the coefficient is equal to 5.1. In the subacute experiment, they have a toxic effect mainly on the hepatorenal system. The threshold of acute inhalation action of BTAA is 100.7, VM-7-02-57.8 mg/m3. Conclusion. A tentative safe level of exposure to VM-7-02 in the air of the working area is recommended at 0.3 mg/m3, BTAA is recommended at 2.0 mg/m3. Compliance with this standard will minimize the risk to the health of workers.

Application of Electron Optics to Characterization of Particulate Pollutants

1972 ◽  
Vol 30 ◽  
pp. 364-365
Author(s):  
J. B. Moran ◽  
J. L. Miller
Keyword(s):  
Air Quality ◽  
Quality Standards ◽  
Ambient Air ◽  
Hazardous Substances ◽  
Fuel Additives ◽  
Ambient Air Quality ◽  
Air Quality Standards ◽  
Emission Standards ◽  
Stationary Sources ◽  
Ambient Air Quality Standards

The Clean Air Act Amendments of 1970 provide the basis for a dramatic change in Federal air quality programs. The Act establishes new standards for motor vehicles and requires EPA to establish national ambient air quality standards, standards of performance for new stationary sources of pollution, and standards for stationary sources emitting hazardous substances. Further, it establishes procedures which allow states to set emission standards for existing sources in order to achieve national ambient air quality standards. The Act also permits the Administrator of EPA to register fuels and fuel additives and to regulate the use of motor vehicle fuels or fuel additives which pose a hazard to public health or welfare.National air quality standards for particulate matter have been established. Asbestos, mercury, and beryllium have been designated as hazardous air pollutants for which Federal emission standards have been proposed.

PEMANFAATAN KARBON AKTIF UNTUK MENGURANGI CEMARAN FORMALIN PADA IKAN ASIN JAMBAL ROTI

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Erma Ayu Nurcahyani ◽  
Merkuria Karyantina ◽  
Nanik Suhartatik
Keyword(s):  
Active Carbon ◽  
Food Preservation ◽  
Hazardous Substances ◽  
Salted Fish ◽  
Hazardous Chemical ◽  
The People ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Safe Food ◽  
Chemical Material

Ikan asin adalah metode untuk pengawetan makanan menggunakan kombinasi penggaraman dan pengeringan matahari. Di kalangan masyarakat, pembuatan ikan asin banyak menggunakan bahan kimia berbahaya seperti formalin. Penambahan bahan berbahaya mempengaruhi kualitas terutama keamanan. Makanan yang aman didefinisikan sebagai makanan yang terbebas dari cemaran biologi, kimia, mikrobiologi, yang dapat mempengaruhi kesehatan. Karbon aktif diduga bersifat polar yang mampu mengadsorpsi formalin. Tujuan penelitian ini adalah untuk mengetahui pengaruh pemberian karbon aktif dalam mengurangi cemaran formalin pada “jambal roti”. Rancangan percobaan yang digunakan untuk percobaan yaitu Rancangan Acak Lengkap (RAL) 2 faktorial, dengan faktor pertama yaitu konsentrasi karbon aktif 0, 3, dan 6% serta perlakuan kedua yaitu lama perebusan selama 5, 10, dan 15 menit. Penelitian ini dimulai dari pembuatan “jambal roti” dengan penambahan formalin dan perebusan dengan karbon aktif kemudian dianalisis uji kadar formalin, NaCl, protein, dan air. Hasil penelitian menunjukkan bahwa konsentrasi karbon aktif dan lama perebusan memberikan pengaruh yang signifikan pada kualitas jambal roti. Semakin tinggi konsentrasi karbon aktif dan lama perebusan maka semakin berkurangnya kadar formalin pada jambal roti. Hasil terbaik penelitian ini adalah karbon aktif 6% dan lama perebusan 15 menit. Menghasilkan formalin 3.21 ppm, NaCl 9.40%, protein 42.00%, dan air 30.02%. Kata kunci: Karbon Aktif, Formalin, Jambal Roti, Lama Perebusan. ABSTRACT                 Salted fish was a method for food preservation using combination of salting and sun drying. Among the people, the manufacture of salted fish use hazardous chemical material such as formaldehyde. The addition of hazardous substances affects the quality especially the safety. Safe food define as food that free from biological, chemical, microbiological contaminants that can affect health. Active carbon suspected to be polar which able to adsorb formaldehyde. The purpose of this research was to determine the influence of active carbon in reducing formaldehyde in salted fish “jambal roti”. The research used completely randomized design (CRD) with 2 factors, the first factor was the concentration of active carbon 0, 3, and 6% and the second was the boiling time (for 5, 10, and 15 min). This research was started from making “jambal roti” with the addition of formaldehyde and boiling with active carbon then analyzed for formaldehyde content, NaCl, protein, and moisture. The result showed that the concentration of active carbon and boiling time had a significant effect in quality salted fish “jambal roti”. The higher the concentration of active carbon and boiling time the more formaldehyde in “jambal roti” were removed. The best results of the research was 6% active carbon and 15 min of boiling time. Resulting 3.21 ppm of formaldehyde, 9.40% of NaCl, 42.00% of protein, and 30.02% of moisture. Keywords: Active Carbon, Formaldehyde, Jambal Roti, Boiling Time

The Politics of Precaution

2012 ◽  
Author(s):  
David Vogel
Keyword(s):  
United States ◽  
Animal Feed ◽  
The United States ◽  
Hazardous Substances ◽  
Risk Regulation ◽  
Scientific Certainty ◽  
European Public ◽  
Wide Range ◽  
Regulatory Controls ◽  
Milk Hormones

This book examines the politics of consumer and environmental risk regulation in the United States and Europe over the last five decades, explaining why America and Europe have often regulated a wide range of similar risks differently. It finds that between 1960 and 1990, American health, safety, and environmental regulations were more stringent, risk averse, comprehensive, and innovative than those adopted in Europe. But since around 1990 global regulatory leadership has shifted to Europe. What explains this striking reversal? This book takes an in-depth, comparative look at European and American policies toward a range of consumer and environmental risks, including vehicle air pollution, ozone depletion, climate change, beef and milk hormones, genetically modified agriculture, antibiotics in animal feed, pesticides, cosmetic safety, and hazardous substances in electronic products. The book traces how concerns over such risks—and pressure on political leaders to do something about them—have risen among the European public but declined among Americans. The book explores how policymakers in Europe have grown supportive of more stringent regulations while those in the United States have become sharply polarized along partisan lines. And as European policymakers have grown more willing to regulate risks on precautionary grounds, increasingly skeptical American policymakers have called for higher levels of scientific certainty before imposing additional regulatory controls on business.

A Three-Dimensional Tetraphenylethylene-Based Fluorescence Covalent Organic Framework for Molecular Recognition

2020 ◽  
Author(s):  
Junxia Ren ◽  
Yaozu Liu ◽  
Xin Zhu ◽  
Yangyang Pan ◽  
Yujie Wang ◽  
...  
Keyword(s):  
Molecular Recognition ◽  
Fluorescence Probe ◽  
Three Dimensional ◽  
Hazardous Substances ◽  
Covalent Organic Framework ◽  
Highly Sensitive ◽  
Volatile Organic ◽  
Polycyclic Aromatic ◽  
Better Than ◽  
Organic Framework

<p><a></a><a></a><a></a><a></a><a></a><a></a><a></a><a>The development of highly-sensitive recognition of </a><a></a><a></a><a></a><a></a><a>hazardous </a>chemicals, such as volatile organic compounds (VOCs) and polycyclic aromatic hydrocarbons (PAHs), is of significant importance because of their widespread social concerns related to environment and human health. Here, we report a three-dimensional (3D) covalent organic framework (COF, termed JUC-555) bearing tetraphenylethylene (TPE) side chains as an aggregation-induced emission (AIE) fluorescence probe for sensitive molecular recognition.<a></a><a> </a>Due to the rotational restriction of TPE rotors in highly interpenetrated framework after inclusion of dimethylformamide (DMF), JUC-555 shows impressive AIE-based strong fluorescence. Meanwhile, owing to the large pore size (11.4 Å) and suitable intermolecular distance of aligned TPE (7.2 Å) in JUC-555, the obtained material demonstrates an excellent performance in the molecular recognition of hazardous chemicals, e.g., nitroaromatic explosives, PAHs, and even thiophene compounds, via a fluorescent quenching mechanism. The quenching constant (<i>K</i><sub>SV</sub>) is two orders of magnitude better than those of other fluorescence-based porous materials reported to date. This research thus opens 3D functionalized COFs as a promising identification tool for environmentally hazardous substances.</p>

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