In humans and animals, exhalation is the primary route of excretion fo terjemahan - In humans and animals, exhalation is the primary route of excretion fo Bahasa Indonesia Bagaimana mengatakan

In humans and animals, exhalation i

In humans and animals, exhalation is the primary route of excretion for inhaled ammonia (ATSDR, 1990).
4.1.2 Genotoxicity and Carcinogenicity
An increased frequency of chromosome aberrations and sister chromatid exchanges were reported for workers in a nitrogen fertilizer factory (Yadav and Kaushik, 1997). The ambient air concentration reported for ammonia was very low (0.1 ppm or 0.07 mg/m3) and the potential for exposure to other nitroso compounds was not evaluated. In their review of ammonia toxicity, the ATSDR (1990) did not identify any data regarding genotoxic or carcinogenic effects following inhalation exposure of animals or human.
4.1.3 Acute Effects
Numerous studies have reported the acute adverse health effects of ammonia inhalation in animals and humans (Stombaugh et al., 1969; Coon et al., 1970; Mayan and Merilan, 1972; Richard et al., 1978; Tepper et al., 1985; IPCS, 1986; ATSDR, 1990; Urbain et al. 1996; Morgan, 1997; Murata and Horino, 1999; Jones et al., 2001; 2000).
The following discussion describes the effects from acute exposures of animals and humans as reported in selected studies published up until 2001. Tables 10 and 11 provide a summary of these effects in animals and humans, respectively.
The acute inhalation of ammonia can be severely debilitating or lethal to animals and humans at air concentrations greater than 5000 ppm (3483 mg/m3), although very high air concentrations can be tolerated for short periods. In general, the acute health effects reported in animals following short-term inhalation of ammonia include: oral, nasal and eye irritation; respiratory tract irritation; decreased respiratory rate; increased respiratory depth; reduced body weight, and lethargy. The acute effects of ammonia inhalation by humans are similar to those reported in animal studies and include: oral, nasal and eye irritation, respiratory tract irritation, and increased respiratory depth.
4.1.3.1 Acute Adverse Health Effects in Experimental Animals
The lethal air concentration (LC50) for ammonia varies according to the species evaluated. One-hour LC50 values for ammonia range from up to 16,600 ppm (11,562 mg/m3) for rats, 10,050 ppm (7,000 mg/m3) for rabbits and cats and 4,837 ppm (3,369 mg/m3) for mice. The duration of exposure also affects lethality, with very high concentrations tolerated over shorter or intermittent exposure periods (ATSDR, 1990; IPCS, 1986; Coon et al., 1970).
A pipeline rupture released a cloud of 99% anhydrous ammonia (no air concentration estimated) in a field of cattle resulting in death, spontaneous abortion, blindness and severe respiratory distress to cattle in the immediate vicinity of the leak. The symptoms reported in less severely exposed cattle included runny eyes, runny noses, coughing and wheezing (Morgan, 1997).
In rats, irritation of the upper respiratory tract and reduced body weight occurred following continuous exposure for 1 week to 500 ppm (348 mg/m3) ammonia (Richard et al., 1978).
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Pada manusia dan hewan, pernafasan adalah rute utama pengeluaran untuk dihirup amonia (ATSDR, 1990).4.1.2 Genotoxicity dan CarcinogenicityPeningkatan frekuensi penyimpangan kromosom dan adik pertukaran kromatid dilaporkan untuk pekerja di pabrik pupuk nitrogen (yudhi dan Kaushik, 1997). Udara ambient konsentrasi dilaporkan untuk amonia adalah sangat rendah (0.1 ppm atau 0.07 mg/m3) dan potensi untuk paparan senyawa nitroso lain tidak dievaluasi. Dalam review mereka toksisitas amonia, ATSDR (1990) tidak menemukan data mengenai genotoksik atau karsinogenik efek setelah terekspos inhalasi hewan atau manusia.4.1.3 akut efekSejumlah penelitian telah melaporkan efek akut merugikan kesehatan dari amonia inhalasi pada hewan dan manusia (Stombaugh et al., 1969; Coon et al., 1970; Maya dan Merilan, 1972; Richard et al., 1978; Tepper et al., 1985; PELINDO, 1986; ATSDR, 1990; Urbain et al, 1996; Morgan, 1997; Murata dan Horino, 1999; Jones et al., 2001; 2000).Pembahasan berikut menjelaskan efek dari eksposur akut dari hewan dan manusia seperti yang dilaporkan dalam studi dipilih diterbitkan sampai 2001. Tabel 10 dan 11 menyediakan ringkasan dari efek pada hewan dan manusia, masing-masing.Menghirup akut amonia dapat sangat melemahkan atau mematikan bagi hewan dan manusia pada konsentrasi udara lebih dari 5000 ppm (3483 mg/m3), walaupun udara sangat tinggi konsentrasi dapat ditoleransi untuk periode singkat. Secara umum, efek kesehatan yang akut yang dilaporkan pada hewan yang mengikuti jangka pendek inhalasi amonia meliputi: mulut, hidung dan mata iritasi; saluran pernapasan iritasi; penurunan tingkat pernapasan; kedalaman pernapasan meningkat; mengurangi berat tubuh, dan kelesuan. Efek akut amonia inhalasi oleh manusia sama dengan yang dilaporkan dalam studi hewan dan termasuk: mulut, hidung dan mata iritasi, saluran pernapasan iritasi dan kedalaman pernapasan meningkat.4.1.3.1 efek akut merugikan kesehatan dalam hewan percobaanKonsentrasi mematikan udara (LC50) untuk amonia bervariasi menurut spesies dievaluasi. Nilai LC50 satu jam amonia berkisar dari hingga 16,600 ppm (11,562 mg/m3) untuk tikus, 10,050 ppm (7.000 mg/m3) untuk kelinci dan kucing dan 4,837 ppm (3,369 mg/m3) untuk tikus. Durasi pemaparan juga mempengaruhi lethality, dengan konsentrasi yang sangat tinggi ditoleransi jangka pendek atau intermiten paparan (ATSDR, 1990; PELINDO, 1986; Coon et al., 1970).Pecah pipa dirilis awan 99% anhidrat amonia (tidak ada konsentrasi udara diperkirakan) dalam bidang ternak yang mengakibatkan kematian, aborsi spontan, kebutaan dan kesulitan pernafasan yang parah untuk ternak di sekitar kebocoran. Gejala dilaporkan kurang parah terkena ternak termasuk mata berair, hidung meler, batuk dan mengi (Morgan, 1997).Tikus, iritasi saluran pernapasan bagian atas dan mengurangi berat tubuh terjadi setelah paparan terus-menerus selama 1 minggu ke 500 ppm (348 mg/m3) amonia (Richard et al., 1978).
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