[عوام يسلم]

المشاركة الأصلية كتبت بواسطة reem50

ارجوك اخوي عوام اريد المصدر واي مصدر ثاني يقول عن القطران امن او غير امن
انا مومنه بانه امن واستعملته لابني وايماني من البحوث التي قرائها الاخ قيس العبيدي والحقيقه الرجل ارجع المصادر والكب والبحوث الى عمه الدكتور في امراض الدم وعمه مسافرالان ومنذ سنين الى ماليزيا للتدريس بالجامعات لذلك من الصعب ان ياتي لي باسماء الكتب والمراجع
وقد تسال لماذا تريدين الاسماء فاجيب لاني تقريبا جمعت كل ماقيل هنا وكل تجاربنا في كتاب جميل عن القطران وجعلته اسئله واجوبه وفيه اكثر من 30 سوال وجواب واحد الاسئله هو هل القطران امن لذلك اريد همتك معي وممكن ترسل لي على الخاص اي اسم او مصدر لنتاكد منه حيث اناقش الاخ قيس ثم نطرحه على العام

السرطان غير امن
كيف يكون امن وهو لم يعرف تركيبه 100% ؟؟؟؟
CARCINOGENICITY
Coal tars and coal tar pitches are known to be human carcinogens based on sufficient evidence of carcinogenicity in humans (IARC 1985, 1987). There have been a number of case reports of skin cancer in patients who used tar ointments for a variety of skin diseases. A mortality analysis in the United Kingdom from 1946 showed a greatly increased scrotal cancer risk for patent-fuel workers. Furthermore, a large number of case reports describe the development of skin (including the scrotum) cancer in workers exposed to coal tars or coal-tar pitches. Several epidemiological studies have shown an excess of lung cancer among workers exposed to coal tar fumes in coal gasification and coke production. A cohort study of U.S. roofers indicated an increased risk for cancer of the lung and suggested increased risks for cancers of the oral cavity, larynx, esophagus, stomach, skin, and bladder, and for leukemia. Some support for excess risks of lung, laryngeal, and oral cavity cancer is provided by other studies of roofers. Several epidemiological studies have shown excesses of lung and urinary bladder cancer among workers exposed to pitch fumes in aluminium production plants. A slight excess of lung cancer was found among furnace and maintenance workers exposed to coal tar pitch fumes in a calcium carbide production plant. One study showed a small excess of bladder cancer in tar distillers and in patent-fuel workers. An elevated risk of cancer of the renal pelvis was observed in workers exposed to "petroleum or tar or pitch". One study of millwrights and welders exposed to coal tars and coal tar pitch in a stamping plant showed significant excesses of leukemia and of cancers of the lung and digestive organs (IARC 1987).
When administered topically to experimental animals, coal tars (CAS No.8007-45-2), coal tar extracts, and high-temperature coal tars induced skin papillomas and carcinomas .Pharmaceutical coal tars and tar ointments caused skin papillomas, squamous cell carcinomas, and/or carcinomas when applied to the skin of mice of both sexes. When applied to the skin, coal tar induced epidermoid lung carcinomas in rats, and when applied to the ears of rabbits, coal tar caused skin papillomas. When administered intramuscularly, coal tar fume condensate induced injection site sarcomas in mice of both sexes. Analyses of coal tars indicate the presence of a number of known carcinogens and potentially carcinogenic chemicals which are discussed elsewhere in this document, including benz [a ]anthracene,benzo [b ]fluoranthene,benzo [j] fluoranthene,benzo [k ]fluoranthene, benzo [a pyrene, dibenz [a,h ]anthracene, dibenzo [a,i ]pyrene, and indeno [1,2,3-cd ]pyrene (see Polycyclic Aromatic Hydrocarbons, 15 listings). When administered topically or by whole-body exposure, coal tar pitch, a coal tar distillate, induced skin papillomas and carcinomas in mice. When applied topically, coal tar pitch extracts induced skin papillomas and carcinomas in mice; these extracts also had both initiating and promoting activities (in separate studies) in mouse skin. In one study, an extract of a hard residue from a coke oven tar induced lung tumours, but no skin tumours, in mice. Analyses of coal tar pitches reveal the presence of several carcinogenic polycyclic aromatic hydrocarbons (IARC 1985)..
KNOWN TO BE A HUMAN CARCINOGEN TENTH REPORT ON CARCINOGENS


وهذا الرابط فيه موضوع اخر عن خطوره القطران

http://toxnet.nlm.nih.gov/cgi-bin/si...rm+@DOCNO+5050


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