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   Scientific Tools and Tips

Material Grades

ACS Grade: Materials conforming with the specifications and procedures outlined in the American Chemical Society Specifications, 9th Edition, 2000.

Analytical Grade: Designates reagents suitable for use in analytical procedures.

Biotechnology Grade: Materials equivalent to Ultra Pure, but particularly suitable for use in Molecular Biology applications.  Tested for specific contaminants such as nucleases and bacterial (?) where appropriate.

Certified/Certifiable Grade: Materials, typically dyes and stains, that meet the requirements of the Biological Stain Commission. Certified reagents have been tested and validated by the Biological Stain Commission.

Electrophoresis Grade: Material specially for Electrophoretic applications

High Purity Grade: Materials of superior quality where there are no published standards.

Reagent Grade: High Purity materials which meet the specifications noted in BBI’s catalog.

Technical Grade: Designates materials of selected commercial or industrial quality.

Ultra Pure Grade: Material with a purity level exceeding the various monograph grades.

USP Grade: Materials conforming with the specifications and procedures outlined in the United States Pharmacopeia, 26th Edition, 2003

Linear Measure
1 inch =25.4 millimetres
1 foot =12 inches =0.3048 metre
1 yard =3 feet =0.9144 metre
1 (statute) mile =1760 yards =1.609 kilometres
1 nautical mile =1852 m
1 millimetre =0.03937 inch
1 centimetre =10 mm. =0.3937 inch
1 decimetre =10 cm. =3.937 inches
1 metre =10 dm. =1.0936 yards =3.2808 feet
1 decametre =10 m. =10.936 yards
1 hectometre =100 m. =109.4 yards
1 kilometre =1000 m. =0.6214 mile
1 mile marin =1852 m. =1.1500 mile
Square Measure
1 square inch =6.45 sq.centimetres
1 square foot =144 sq.in.=9.29 sq.decimetres
1 square yard =9 sq.ft.=0.836 sq.metre
1 acre =4840 sq.yd. =0.405 hectare
1 square mile =640 acres =259 hectares
1 square centimetre =0.155 sq.inch
1 square metre =1.196 sq.yards
1 are =100 square metres =119.6 sq.yards
1 hectare =100 ares =2.471 acres
1 square kilometre =0.386 sq.mile
Cubic Measure
1 cubic inch =16.4 cu.centimetres
1 cubic foot =1728 cu.in.=0.0283 cu.metre
1 cubic yard =27 cu.ft.=0.765 cu.metr
1 cubic centimetre =0.061 cu.inch
1 cubic metre =1.308 cu.yards

Avoirdupois Weight
1 grain =0.065 gram
1 dram =1.772 grams
1 ounce =16 drams =28.35 grams
1 pound =16 ounces =7000 grains =0.4536 kilogram
1 stone =14 pounds =6.35 kilograms
1 quarter =2 stones =12.70 kilograms
1 hundredweight =4 quarters =50.80 kilograms
1 short ton =2000 pounds =0.907 tonne
1 (long) ton =20 hundredweight =1.016 tonnes
Weight
1 milligram =0.015 grain
1 centigram =10 mg. =0.154 grain
1 decigram =10 cg. =1.543 grains
1 gram =10 dg. =15.43 grains
1 decagram =10 g. =5.64 drams
1 hectogram =100 g. =3.527 ounces
1 kilogram =1000 g. =2.205 pounds
1 ton (metric ton), =1000 kg.
=0.984 (long) ton =1.1023
Capacity Measure
1 millilitre =0.002 pint (British)
1 centilitre =10 ml. =0.018 pint1
1 decilitre =10 cl. =0.176 pint
1 litre =10 dl. =1.76 pints
1 decalitre =10 l. =2.20 gallons

1 hectolitre =100 l. =2.75 bushels
1 kilolitre =1000 l. =3.44 quarters
Capacity Measure – BritishCapacity Measure - American dryCapacity Measure - American liquid
1 pint =20 fluid oz. =34.68 cu.in. =0.568 litre
1 quart =2 pints =1.136 litres
1 gallon =4 quarts =4.546 litres
1 peck =2 gallons =9.092 litres
1 bushel =4 pecks =36.4 litres
1 quarter =8 bushels=2.91 hectolitres
1 pint =33.60 cu.in. =0.550 litre
1 quart =2 pints =1.101 litres
1 peck =8 quarts =8.81 litres
1 bushel =4 pecks =35.3 litres 
1 pint =16 fluid oz. =28.88 cu.in. =0.473 litre
1 quart =2 pints =0.946 litre
1 gallon =4 quarts =3.785 litres