金币
UID53526
帖子
主题
积分28315
注册时间2012-10-10
最后登录1970-1-1
听众
性别保密
|
发表于 2016-4-22 08:28:01
|
显示全部楼层
是清洁不是清场
不知道清洁标准是多少
如果就这两个品种的话限度应该不会太低
那么低的含量
对于像扑热息痛这样的品种
会达到最低起效量吗?
感兴趣的可以计算一下
以下是FDA发布的毒理学数据
13 NONCLINICAL TOXICOLOGY
13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility
Carcinogenesis
Long-term studies in mice and rats have been completed by the National Toxicology
Program to evaluate the carcinogenic potential of acetaminophen. In 2-year feeding studies,
F344/N rats and B6C3F1 mice were fed a diet containing acetaminophen up to 6,000 ppm.
Female rats demonstrated equivocal evidence of carcinogenic activity based on increased
incidences of mononuclear cell leukemia at 0.8 times the maximum human daily dose
(MHDD) of 4 grams/day, based on a body surface area comparison. In contrast, there was
no evidence of carcinogenic activity in male rats (0.7 times) or mice (1.2 to 1.4 times the
MHDD, based on a body surface area comparison).
Mutagenesis
Acetaminophen was not mutagenic in the bacterial reverse mutation assay (Ames test). In
contrast, acetaminophen tested positive in the in vitro mouse lymphoma assay and the in
vitro chromosomal aberration assay using human lymphocytes. In the published literature,
acetaminophen has been reported to be clastogenic when administered a dose of
1,500 mg/kg/day to the rat model (3.6 times the MHDD, based on a body surface area
comparison). In contrast, no clastogenicity was noted at a dose of 750 mg/kg/day (1.8 times
the MHDD, based on a body surface area comparison), suggesting a threshold effect.
Impairment of Fertility
In studies conducted by the National Toxicology Program, fertility assessments have been
completed in Swiss mice via a continuous breeding study. There were no effects on fertility
parameters in mice consuming up to 1.7 times the MHDD of acetaminophen, based on a
body surface area comparison. Although there was no effect on sperm motility or sperm
density in the epididymis, there was a significant increase in the percentage of abnormal
sperm in mice consuming 1.7 times the MHDD (based on a body surface area comparison)
and there was a reduction in the number of mating pairs producing a fifth litter at this dose,
suggesting the potential for cumulative toxicity with chronic administration of
acetaminophen near the upper limit of daily dosing.
Published studies in rodents report that oral acetaminophen treatment of male animals at
doses that are 1.2 times the MHDD and greater (based on a body surface area comparison)
result in decreased testicular weights, reduced spermatogenesis, reduced fertility, and
reduced implantation sites in females given the same doses. These effects appear to increase
with the duration of treatment. The clinical significance of these findings is not known. |
|