Solving a traveling salesman problem with 25 variables would require kilograms of DNA and bathtub quantities of enzymes.
In 1961 the 60-story Chase Manhattan Bank Building, designed by Skidmore, Owings & Merrill, had a standard steel frame with rigid portal wind bracing, which required 275 kilograms of steel per square metre (55 pounds of steel per square foot), nearly the same as the Empire State Building of 30 years earlier.
The estimated energy requirement was calculated as kilojoules required per kilogram of body weight using median standardized bodyweight for each category [ 17].
The TTA and GCA productivities were 79 and 115 kilograms per liter of adsorbent per day, respectively and only 0.50 cubic meters of desorbent were required per kilogram of products.
The low values of sediment and water required per kilogram of soybean produced in the chemical fertilization and 100 m3 ha− 1 PS treatments indicate that these management regimes are more sustainable.
The energy required per kilogram of dry corn stover was calculated to be approximately 809 kJ.
It is also recognised that the initial start-up of a fusion reactor will require several kilograms of tritium within a scenario in which radioactive decay, ITER and subsequent demonstrator reactors are expected to have consumed most of the known tritium stockpile.
It used a system of exterior diagonal bracing to form a rigid tube devised by the engineer Fazlur Khan; although the Hancock building is 100 stories, or 343 metres (1,127 feet), high, its structure is so efficient that it required only 145 kilograms of steel per square metre (29 pounds per square foot).
Researchers have found that the steel plate-mail armor worn during the 15th century, which weighed 30 to 50 kilograms, required its wearers to expend more than twice the usual amount of energy when they walked or ran.
In addition, such complex mixtures offer a substantial challenge for reproducible synthesis when scaling the material from the milligrams needed for exploratory work to the kilograms required for clinical trials and drug productions.
