Essays Tagged: "Manganese"


majorelements such as calcium, magnesium, iron, iodine etc. Thenthe trace elements such as copper, manganese fluorine andzinc.Once of the most important is calcium. Calcium is used tobuild up your bo ...

(1 pages) 53 0 4.0 Oct/1996

Subjects: Science Essays > Biology

Differences and Effects of Natural and Synthetic Fertilizers

onsist of all the other elements and compounds required for sufficient growth, such as iron, boron, manganese, copper, zinc, molybdenum and chlorine. In some cases, these nutrients are found to be mis ...

(3 pages) 48 0 5.0 Jan/1996

Subjects: Science Essays > Biology

Asymmetric Epoxidation of Dihydronaphthalene with a Synthesized Jacobsen's Catalyst

aphthalene as well as naphthalene.IntroductionIn 1990, professor E.N. Jacobsen reported that chiral manganese complexes had the ability to catalyze the asymmetric epoxidation of unfunctionalized alken ... roviding enantiomeric excesses that regularly reaching 90% and sometimes exceeding 98% . The chiral manganese complex Jacobsen utilized was [(R,R)-N,N'-Bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexa ...

(9 pages) 69 0 3.7 Dec/1996

Subjects: Science Essays > Chemistry

The importance of the manganese in the human body

Manganese make active the activity of enzymes in the body, including those that help proteins to be ... mation of collagen, which helps heal wounds.The human body contains approximately ten milligrams of manganese, most of which is found in the liver, bones and kidneys. In addition, this trace element i ... s of protein and nucleic acids, and for the RNA chain beginning.Moreover, an enough daily intake of manganese is 2 to 5 milligrams and up to 10 milligrams daily is safe. However, good food sources of ...

(1 pages) 23 0 3.0 Mar/2004

Subjects: Science Essays > Biology > Human Biology

Pakistan vs. US

rily agricultural. The country's mineral resources include salt, chromite, coal, gypsum, limestone, manganese, sulfur, clay, graphite, copper, petroleum, and natural gas, while the United States has m ...

(2 pages) 41 0 2.7 Apr/2004

Subjects: Area & Country Studies Essays

To determine the % by mass of manganese (IV) oxide in a solid sample. ( By Titration )

ons were performed.Part B1. All instruments were washed by using deionised water.2. 1g of the solid manganese(Ⅳ) oxide was weighted and put into a conical flask.3. 25cm3 of 1M potassium iodide w ...

(2 pages) 31 0 4.0 Nov/2005

Subjects: Science Essays > Chemistry

Materials Selection and Testing. A description of the properties of various different materials.

e terminals, plastic, and mild steel screws.- Welded Pressure Vessel - A suitable material would be manganese steel.(b).- Medium carbon steel - A drive shaft is required to be strong, tough, have high ... onable strength and ductility. Due to low levels of carbon they do not respond to heat treatments.- Manganese metal - There is a natural desire to employ materials of high strength and satisfactory fr ...

(1 pages) 27 0 3.0 Feb/2006

Subjects: Science Essays > Engineering > Manufacturing Engineering


an alloy of aluminium (about 95%), copper (about 4%), and small amounts of magnesium (0.5%-1%) and manganese (less than 1%). It is far better in tensile strength than elemental aluminium, though less ...

(1 pages) 14 0 0.0 Feb/2006

Subjects: Science Essays > Chemistry

Fiscal Policy Simulation

e for agriculture. Exports include fresh fruits, vegetables, processed foods, iron ore, bauxite and manganese. The underdeveloped industries are mining and processed foods. Tourism is a possible indus ...

(2 pages) 688 1 4.0 Dec/2006

Subjects: Social Science Essays > Economics > Development Studies

Rock art, Saharan, European and San

reasons the rock art we study today is still visible is because of the use of mineral pigments, eg. manganese, hematite, malachite, gypsum, limonite, clays and various oxides. The amazingly fine lines ...

(13 pages) 21 0 0.0 Apr/2007

Subjects: Art Essays


erica has a lot of mining. They mine a lot of different things then the U.S.Some of these goods are manganese, lead, copper, natural gas, uranium, and many more. This also makes for a diverse manufact ...

(2 pages) 407 0 3.7 May/2001

Subjects: Science Essays > Chemistry

Genotoxic Agents: Heavy Metals

s metals as examples of this: cadmium, for example, when in water if it's combined with calcium and manganese it can compact the DNA structure, this can also be caused by binding copper and calcium io ...

(7 pages) 22 1 0.0 Feb/2008

Subjects: Science Essays > Environmental Science