Cotinine levels in blood, urine and cervical fluid of smokers and nonsmokers were analyzed by capillary-column gas chromatography. The sensitivity of this method appeared to be 100%. The specificity was lower (87.5% in blood, 25% in urine and 75% in cervical fluid). Nonsmokers exposed to ...
The 40 people with undetectable levels of nicotine and cotinine were classified as nonsmokers; 40位未检出尼古丁和可替宁的志愿者被归类为“非烟民”; 2. The blood tests check for cotinine- a byproduct of nicotine that usually is detectable for up to four to five days. 验血检查cotinine——一种...
Smokers had highly elevated urine cotinine levels (1,454+/-903 ng/mL). In 16 (76.2%) of 21 nonsmokers, urine cotinine was detected (3.25+/-4.08 ng/mL). The correlations between urine cotinine and blood antioxidants levels were not found. Neither, the correlation between smoking status ...
Forty-three nonsmokers attending an infertility clinic reported their degree of passive exposure to environmental tobacco smoke (ETS) and provided samples of blood and seminal plasma. Levels of nicotine and cotinine in biological fluid were evaluated by a radioimmunoassay. The data indicate that exposur...
Forty-three nonsmokers attending an infertility clinic reported their degree of passive exposure to environmental tobacco smoke (ETS) and provided samples of blood and seminal plasma. Levels of nicotine and cotinine in biological fluid were evaluated by a radioimmunoassay. The data indicate that exposur...
To evaluate nicotine exposure more precisely, they measured study participants' blood levels of cotinine -- a marker for nicotine exposure. 为了精确评估尼古丁的危害程度,研究人员检测了自愿者血液中的吡咯烷酮的含量,该物质为尼古丁体内存在含量的标志。 news.dxy.cn 3. to investigate the stability of coti...
After administration to rats, cotinine levels in the brain reach fourfold those of nicotine at 4 h following injection. Cotinine is not biotransformed in the brain, allowing accumulation of this substance to levels greater than that of nicotine. Like nicotine, cotinine is able to induce dopamine ...
When the youth were 20 years of age, blood was drawn from which cotinine was assayed. Results: Intervention program participants (M = 0.672, SD = 0.048) displayed significantly lower cotinine levels at age 20 years than did control participants (M = 0.824, SD = 0.059), P = .046. ...
The microenvironment of the human antral follicle: interrelationships among the steroid levels in antral fluid, the population of granulosa cells, and the status of the oocyte in vivo and in vitro. J. Clin. Endocrinol. Metab. 49:851-860. 31. Jensen, J., C. Christiansen, and P. Rodbro....
Smoking and cervical intraepithelial neoplasia: nicotine and cotinine in serum and cervical mucus in smokers and nonsmokers. A blood sample before treatment was taken from 35 women with cervical intraepithelial neoplasia. Levels of nicotine and cotinine were analyzed by radioimmu... D Hellberg,S Nils...