Obviously the more product you have and the closer the impurities are, the more silica gel you will need. 1  A good rule of thumb is: 2  for difficult separations (Î´CV â¤ 1) use up to 100 g (~200 mL) of silica gel per gram of compound to be purified (1% load)
Median age at first marriage for American Indian and Alaska Native men and women age 15 to 54, respectively, in 2010. For the population as a whole in this age range, the respective numbers were 28.7 and 26.7 years. The difference in the median age at first marriage between American Indian and Alaska Native women and women overall is not statistically significant.
For instance, the gap between projected life expectancy of First Nations people and all Canadians is narrowing signiï¬cantly. Between 1975 and 2000 the life expectancy of male Status Indians increased from 59.2 years to 69.5, compared to 70.3 to 76 for all Canadian males.