For the MS degree: No. The University residency requirement is 45 units taken at Stanford for an MS. No transfer credits are allowed to count towards the masters residency requirement. For the PhD degree: Yes. The PhD requires 135 units, of which 90 units must be taken at Stanford during the PhD program.
The term carcinogen denotes a chemical substance or a mixture of chemical substances. which induce cancer or increase its incidence. Substances which have induced benign and malignant. tumours in well performed experimental studies on animals are considered also to be presumed or.
You may have heard that a substance is a carcinogen or is carcinogenic. What does this mean? How do we know that something can cause cancer? Definition. A carcinogen is defined as something that can directly cause cancer. This can be a chemical substance, a virus, or even the medications and radiation we use to treat cancer. While many cancers are caused by a carcinogen or combination of carcinogens, the tendency to develop cancer may also be inherited as part of our genome.