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Redução de cromo hexavalente por bactérias isoladas de solos contaminados com cromo [PDF]
Ciencia Rural, 2007 A redução do Cr(VI) para Cr(III) diminui a toxidade deste metal no ambiente, uma vez que o Cr(III) é insolúvel às membranas biológicas. Assim, a redução microbiana do Cr(VI) é uma alternativa para reduzir os impactos ambientais causados por este metal, utilizado em diversos processos industriais.
Flavio Camargo
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Alloy Digest, 1974
Abstract CROMO-W55 is a medium-carbon air-hardening tool steel for cold-work applications. It is useful for special tools because it has a combination of good wear resistance, toughness and high hardenability. This datasheet provides information on composition, physical properties, hardness, and elasticity.
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Abstract CROMO-W55 is a medium-carbon air-hardening tool steel for cold-work applications. It is useful for special tools because it has a combination of good wear resistance, toughness and high hardenability. This datasheet provides information on composition, physical properties, hardness, and elasticity.
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Alloy Digest, 1964
Abstract CROMO-N tool steel is a low-carbon, high-chromium grade, specially developed to provide optimum resistance to heat-checking during service at elevated temperatures. It is recommended for aluminum die casting dies, extrusion press tooling, aluminum and copper forging dies, and mandrels for extruding all nonferrous materials. This
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Abstract CROMO-N tool steel is a low-carbon, high-chromium grade, specially developed to provide optimum resistance to heat-checking during service at elevated temperatures. It is recommended for aluminum die casting dies, extrusion press tooling, aluminum and copper forging dies, and mandrels for extruding all nonferrous materials. This
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Alloy Digest, 1973
Abstract Cromo-WV is a 5% chromium-tungsten-vanadium-molybdenum tool steel for all general-purpose hot-work tools and dies. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness.
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Abstract Cromo-WV is a 5% chromium-tungsten-vanadium-molybdenum tool steel for all general-purpose hot-work tools and dies. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness.
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Alloy Digest, 1977
Abstract CROMO-V is a 5% chromium hot-work steel with an excellent combination of red-hardness, shock resistance and abrasion resistance; these are the properties needed for good hot-work characteristics. It will withstand drastic cooling from maximum operating temperatures. This datasheet provides information on composition and hardness
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Abstract CROMO-V is a 5% chromium hot-work steel with an excellent combination of red-hardness, shock resistance and abrasion resistance; these are the properties needed for good hot-work characteristics. It will withstand drastic cooling from maximum operating temperatures. This datasheet provides information on composition and hardness
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Alloy Digest, 1968
Abstract CROMO-W is a general purpose hot work tool and die steel having excellent resistance to wear, shock, and drastic changes in temperature. It is recommended for hot shear blades, forging and bolt heading dies, punches and other types of hot work tools.
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Abstract CROMO-W is a general purpose hot work tool and die steel having excellent resistance to wear, shock, and drastic changes in temperature. It is recommended for hot shear blades, forging and bolt heading dies, punches and other types of hot work tools.
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Alloy Digest, 1973
Abstract Cromo-High V is a 5% chromium-molydbenum-vanadium tool steel that is used widely in the die-casting industry. It has high red-hardness with good resistance to abrasion and heat checking. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture ...
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Abstract Cromo-High V is a 5% chromium-molydbenum-vanadium tool steel that is used widely in the die-casting industry. It has high red-hardness with good resistance to abrasion and heat checking. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture ...
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REDUCCIÓN DE CROMO (VI) A CROMO (III) USANDO CAMU CAMU
Revista Peruana de Química e Ingeniería Química, 2010Se hicieron pruebas de laboratorio para determinar el efecto reductor del ácido ascórbico, ácido cítrico y camu camu (Myrciana dubia). Las pruebas con ácido ascórbico y ácido cítrico se hicieron usando 2, 3.5 y 7 equivalentes de ácido, a 100 rpm y pH inicial de 10.
Rivera C., D. +2 more
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ESTUDIO TEÓRICO DEL ENLACE MÚLTIPLE CROMO-CROMO EN COMPLEJOS DE CROMO (II) CON LIGANDOS CARBOXILATOS
Revista Peruana de Química e Ingeniería Química, 2012En el presente trabajo se estudió la naturaleza del enlace múltiple cromo-cromo, en complejos de cromo (II) con grupos carboxilatos, evaluándose los detalles estructurales y las correlación existente entre las distancias de enlace metal-metal con sus propiedades electrónicas, como la energía de los orbitales moleculares (HOMO, LUMO), índices globales ...
Guzmán D., A. +4 more
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2017
En este trabajo estudiaremos algunos de los diferentes aspectos dentro de las colecciones de cualquier tipo. Cabe decir, que, de aquí en adelante supondremos que estamos trabajando con colecciones de cromos, con el fin de poder explicar los procedimientos y resultados de manera más sencilla y clara.
Pecharroman Ravella, Emili +1 more
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En este trabajo estudiaremos algunos de los diferentes aspectos dentro de las colecciones de cualquier tipo. Cabe decir, que, de aquí en adelante supondremos que estamos trabajando con colecciones de cromos, con el fin de poder explicar los procedimientos y resultados de manera más sencilla y clara.
Pecharroman Ravella, Emili +1 more
openaire +1 more source