منابع مشابه
Multiple factors in carcinogenesis.
Before making some comments on multiple factors, I would like briefly to refer to the discussion at this conference. There has been no reference, strangely enough, to a law known as the Delaney Amendment. Asbestos is a carcinogen. It is apparently being deliberately added to certain drugs and foodstuffs by particular processing and manufacturing practices. Surely, when asbestos is introduced in...
متن کاملproficiency level and factors fostering reticence in efl learners
according to cheng (1999), in recent esl/efl literature, asian (especially east asian) learners of english as a foreign/second language have been arguably reported as reticent and passive learners. the most common allegations are that these students are reluctant to participate in classroom discourse; they are unwilling to give responses; they do not ask questions; and they are passive and over...
15 صفحه اولGenetic and environmental factors in human carcinogenesis.
MOST HUMAN cancers are triggered or propagated by exposure to environmental agents. Carcinogenesis is an expression of a complex interplay between exogenous factors that may be inhaled, ingested, or absorbed through the skin, and the evoked responses in the host that are under genetic control. Conversion of a normal cell to neoplastic phenotype involves molecular activation and expression of tr...
متن کاملMultiple genetic alterations in human carcinogenesis.
Cancer development in man appeared to be a multistage process as suggested by epidemiological studies on commonly occurring gastric, colon, and breast cancers and also on human retrovirus-related leukemia, and by the finding by physicians and surgeons of precancerous lesions for many types of neoplasias. In the last 10 years it has become evident that human cancers have multiple genetic alterat...
متن کاملCell intrinsic & extrinsic factors in cervical carcinogenesis.
Human papillomavirus (HPV) infection is a common sexually transmitted infection which a majority of infected women are able to clear by mounting an effective immune response. Individuals with a suboptimal immune response may be at increased risk of persistent HPV infection leading to sequelae of various grades of dysplasias and / or associated malignancy. Both cell intrinsic and extrinsic pheno...
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ژورنال
عنوان ژورنال: Environmental Health Perspectives
سال: 1974
ISSN: 0091-6765,1552-9924
DOI: 10.1289/ehp.749331