In 1973, the feds estimated that semis got about 5.6 miles per gallon of diesel; today's estimate is 6.5 mpg, although different trucks get fuel economy in a range from 4 to 8. Going up a steep hill, a truck's mileage might drop to about 2.9 mpg, while going down the same hill will raise it to more than 23 mpg. New fuel-economy standards that take effect beginning in 2014 will require semi trucks with a sleeper cab to get 7.2 mpg on level roads.
Absorbable biological suture material. Chromic is an absorbable suture made by twisting together strands of purified collagen taken from bovine intestines. Due to undergoing a ribbon stage chromicisation (treatment with chromic acid salts), the chromic offers roughly twice the stitch-holding time of plain catgut.
Sutures, stitches and staples are used for the same purpose-to close wounds or surgical incisions-but they are not the same.For sutures, doctors use a thread or strand of material to perform wound closure.ypes of Sutures and Stitches. Sutures can be either absorbable or nonabsorbable. Absorbable sutures are intended to be broken down by the body over time and eventually dissolve completely. Some materials used to make absorbable sutures are derived from animal products that have been specially processed.