gram science definition
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- Definition of gram. 1  1 : a metric unit of mass equal to 1⁄1000 kilogram and nearly equal to the mass of one cubic centimeter of water at its maximum density — see metric system table. 2  2 : the weight of a gram under the acceleration of gravity.
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- 1 ml (milliliter) = 1/1000 L (Liter, the official SI unit of volume). Weight of 1 milliliter (ml) of pure water at temperature 4 °C = 1 gram (g) . The gram (British spelling: gramme, abbreviation and symbol: g) is a unit of mass in the SI system (metric system). One gram is equal to one thousandth of the kilogram (kg), which is the current SI (Metric system) base unit of mass.
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Gram Staining Gram staining is a common technique used to differentiate two large groups of bacteria based on their different cell wall constituents. The Gram stain procedure distinguishes between Gram positive and Gram negative groups by coloring these cells red or violet.Gram positive bacteria stain violet due to the presence of a thick layer of peptidoglycan in their cell walls, which retains the crystal violet these cells are stained with. Conversely, the the outer membrane of Gram negative bacteria is degraded and the thinner peptidoglycan layer of Gram negative cells is unable to retain the crystal violet-iodine complex and the color is lost. 2  A counterstain, such as the weakly water soluble safranin, is added to the sample, staining it red.
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Kilogram The gram, 1/1000th of a kilogram, was originally defined in 1795 as the mass of one cubic centimeter of water at the melting point of water. The original prototype kilogram, manufactured in 1799 and from which the IPK is derived, had a mass equal to the mass of 1.000025 liters of water at 4 °C.
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Hans Christian Gram Gram entered medical school in 1878 and graduated in 1883. He travelled throughout Europe between 1878 and 1885. In Berlin, in 1884, he developed a method for distinguishing between two major classes of bacteria. This technique, the Gram stain, continues to be a standard procedure in medical microbiology. Career
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Gram stain Gram staining, also called Gram's method, is a method of differentiating bacterial species into two large groups (Gram-positive and Gram-negative). The name comes from the Danish bacteriologist Hans Christian Gram, who developed the technique.
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Gram The gram is very nearly equal (it was originally intended to be equal; see metric system) to the mass of one cubic centimetre of pure water at 4 °C (39.2 °F), the temperature at which water reaches its maximum density under normal terrestrial pressures. The gram of force is equal to the weight of a gram of mass under standard gravity.
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How to Gram Stain How to Gram Stain Three Parts: Preparing A Gram Stain Performing the Gram Stain Examining the Result Community Q&A Gram staining is a quick procedure used to look for the presence of bacteria in tissue samples and to characterise bacteria as Gram-positive or Gram-negative, based on the chemical and physical properties of their cell walls. The Gram stain should almost always be done as the first step in diagnosis of a bacteria infection.
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Chemical Principles/Gas Laws and the Kinetic Theory gram-molecular mass, a mass in grams numerically equal to the molecular weight of a substance or the sum of all the atomic masses in its molecular formula. For example, the gram-molecular weight of carbon dioxide (CO 2) is 12 (atomic mass of carbon) + (2 × 16) (atomic mass of oxygen), or 44 g. See also mole, molecular weight. 1  Facebook.
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- The gram (abbreviation and symbol: g) is the unit of mass in the metric system (SI, International System of Units). 1 gram (g) = 1000 milligrams (mg) = 0.001 kilogram (kg) = 0.0352739619 ounces (oz) = 0.00220462262 pounds (lbs) = 0.000157473044 stones (st). All Calculators Email this page Send this page to a friend
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- medical Definition of gram 1: a metric unit of mass equal to ¹/₁₀₀₀ kilogram and nearly equal to the mass of one cubic centimeter of water at its maximum density — abbreviation g 2: the weight of a gram under standard gravity
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Units of Measurement The initial metric unit of weight, the gram, was defined as the mass of one cubic centimeter (a cube that is 0.01 meter on each side) of water at its temperature of maximum density. A kilogram is a thousand grams. The cubic decimeter (a cube 0. 1 meter on each side) was chosen as the unit for capacity.
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- Definition of gram. : any of several leguminous plants (such as a chickpea) grown especially for their seed; also : their seeds.
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Definitions &Translations Webster Dictionary(0.00 / 0 votes)Rate this definition: 1  Gram(adj) angry. 2  Gram(noun) the East Indian name of the chick-pea (Cicer arietinum) and its seeds; also, other similar seeds there used for food. 3  Gram(noun) alt. of Gramme.
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Gram-negative Gram-negative. Definition. adjective. Of, or relating to the group of bacteria that take the color of the counterstain (i.e. pink) under the microscope following gram staining.Supplement.Gram staining enables observers to get a clearer view of the morphology of bacterial cells under the microscope.asically, gram-positive bacteria are those that appear violet or bluish under the microscope whereas gram-negative bacteria are those that appear pink. Initially, all bacteria in a bacterial smear on the slide are stained violet.
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Gram Formula Mass Gram Formula Mass. The gram formula mass of a compound is the amount of that compound that has the same mass in grams as the formula mass in atomic mass unit. An atom of each element has a characteristic mass and in like manner each molecule of a compound has a characteristic formula mass.
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"""Conclusion Gram Staining"" Essays and Research Papers" History of the Gram Stain and How it Works. The Gram staining method, named after the Danish bacteriologist who originally devised it in 1882 (published 1884), Hans Christian Gram, is one of the most important staining techniques in microbiology. It is almost always the first test performed for the identification of bacteria. The primary stain of the Gram's method is crystal violet.
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- Kilograms (kg), grams (g), milligrams (mg), and micrograms (µg) Definition. A gram (g) is a metric unit for a small amount of mass or weight. It’s equal to the weight of one. cubic centimeter (or one milliliter) of water. A kilogram (kg) is 1,000 grams. A kg has the same weight as one liter of water. A milligram (mg) is one thousandth of a gram.
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- Gram Stain - Purpose, Procedure and Preparation - Gram Stain -. Gram stain is probably one of the most commonly used staining procedures used in the field of microbiology. It is one of the differential stains that are used to characterize bacteria in one of two groups: either gram positive bacteria or gram negative bacteria.
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- The gram (alternative spelling: gramme;[1] SI unit symbol: g) (Latin gramma, from Greek γράμμα, grámma) is a metric system unit of mass.
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GM gram - a metric unit of weight equal to one thousandth of a kilogram. g, gm, gramme. metric weight unit, weight unit - a decimal unit of weight based on the gram. obolus - a Greek unit of weight equal to one tenth of a gram. carat - a unit of weight for precious stones = 200 mg. dag, decagram, dekagram, dkg - 10 grams.
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Gram Official SI symbol. The only unit symbol for gram that is recognised by the International System of Units (SI) is g following the numeric value with a space, as in 640 g to stand for 640 grams in the English language.
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Gram Gram: Gram (g), unit of mass or weight that is used especially in the centimetre-gram-second system of measurement (see International System of Units). One gram is equal to 0.001
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- gram atom, gram-atomic weight. the quantity of an element whose weight in grams is numerically equal to the atomic weight of the element. the molecular weight of a substance expressed in grams; the basic unit of amount of substance adopted under the Systeme International d'Unites.
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- Convert milliliters to grams [water] (ml to g) 1 ml (milliliter) = 1/1000 L (Liter, the official SI unit of volume). Weight of 1 milliliter (ml) of pure water at temperature 4 °C = 1 gram (g) . The gram (British spelling: gramme, abbreviation and symbol: g) is a unit of mass in the SI system (metric system). One gram is equal to one thousandth of the kilogram (kg), which is the current SI (Metric system) base unit of mass.