An accurate test for how long does nicotine stay in your system can be performed via blood test. If a laboratory is testing for nicotine, it should be performed within 3 days of smoking. It is better for a laboratory to test for cotinine as it remains in the blood stream for about 10 days after smoking.
The pH in the human digestive tract varies greatly (see Human Digestive Tract pH Range Chart on the left side). The pH of saliva is usually between 6.5 - 7.5. After we chew and swallow food it then enters the fundic or upper portion of the stomach which has a pH between 4.0 - 6.5.he pH of any solution is the measure of its hydrogen-ion concentration. The higher the pH reading, the more alkaline and oxygen rich the fluid is. The lower the pH reading, the more acidic and oxygen deprived the fluid is. The pH range is from 0 to 14, with 7.0 being neutral.
Average human body temperature. Body temperature changes throughout the day. It is the lowest in the early morning between 4 and 6 a.m., and the highest in the early evening between 6 and 8 p.m. Normal temperature is about 37Â°C or 98.6Â°F.However, it can be as low as 36.1Â°C (97Â°F) in the early morning to a high of 37.2Â°C (99Â°F) in the evening and still be considered normal.hese temperatures are the core body temperature. It is in the normal range if the orally measured temperature of adults is 98.2Â°F, with fluctuation of 1.3Â°F higher or lower. If the adult shows oral temperature of more than 99.5Â°F, then it is considered as fever or some other medical conditions.