Thursday, September 23, 2010

bivariate correlation

Let us learn about bivariate correlation

A correlation is referred as a measure of the extent when the change in 1 variable are associated or followed by the change in the other variable. 2 variables which are connected in such a way are known as bivariate population. Best example, the yield of a crop varies with the amount of rainfall and so on.

A correlation, or bivariate correlation, measures the relationship between 2 variables. The correlation measures the strength of the relationship.

A bivariate correlation is a statistical test which measures the association or relationship between 2 continuous/interval/ordinal level variables. This test will use probability & tell the researcher the nature of the relationship between the 2 variables, but not the direction of the relationship in the sense of describing causality

Correlation coefficients range from -1 to +1. If the bivariate correlation coefficient is -1, the relationship between the 2 variables is perfectly negative, & if the bivariate correlation coefficient is +1, the relationship between the 2 variables is perfectly positive. The closer the correlation coefficient is nearer to -1 or +1, the stronger the relationship. The closer the correlation coefficient is to zero, the weaker the relationship.


In our next blog we shall learn about advantages of asexual reproduction I hope the above explanation was useful.Keep reading and leave your comments.


Wednesday, September 22, 2010

reproduction of bacteria

Let us learn about reproduction of bacteria

Bacteria can reproduce at marvelous speeds. Some bacteria can reproduce as often as once every twenty minutes! However, bacteria have certain conditions in which to reproduce. These circumstances are not often met, & that is 1 thing that keeps bacteria from growing out of control.

Bacteria reproduce using 2 basic methods: asexual & sexual reproduction.

Asexual reproduction includes only 1 individual or parent. The offspring produced by asexual reproduction are exact duplicates of the parent. Binary fission is the method by which a bacteria splits into 2 cells. Each cell gets an exact copy of the parent cell's genetic material.

Sexual reproduction involves the joining of 2 parent cells & the exchanging of genetic materials. In sexual reproduction, the offspring will contain a mixture of the parent cells' traits. Conjugation is the method by which bacteria join & exchange genetic materials. Once genetic materials are exchanged, every single bacteria cell will go through binary fission to produce an offspring with a new genetic makeup.


In our next blog we shall learn about examples of producers I hope the above explanation was useful.Keep reading and leave your comments.

Monday, September 20, 2010

hydrocarbon suffix

Let us learn about hydrocarbon suffix

For hydrocarbons with 1 or more single bonds between carbon atoms, the molecules are known as alkanes, & the suffix is "-ane".
With 1 or more double bonds, these molecules are known as alkenes the suffix is "-ene".
With 1 or more triple bonds, the molecules are known as alkynes, and the suffix is "-yne".

Hydrocarbons are a class of molecules which contain only carbon & hydrogen atoms. Some of them make very good fuels. Gasoline contains a mixture of hydrocarbons. Unsaturated hydrocarbons, that contain 1 or more double bonds, are useful chemicals for many reactions.

The simplest hydrocarbons are linear molecules in that each carbon atoms is bonded to 2 other carbons atoms, in a linear fashion, except for the carbon atoms at the ends, which are only bonded to 1 other carbon atom. Saturated hydrocarbon names basically end with the suffix "ane" which distinguishes them from unsaturated hydrocarbons, which end with the suffix "ene".

Linear saturated hydrocarbons are called as paraffins or alkanes. Their general formula is CnHn+2.

In our next blog we shall learn about cyclic photophosphorylation I hope the above explanation was useful.Keep reading and leave your comments.


Sunday, September 19, 2010

ammonium phosphate formula

Let us learn about ammonium phosphate formula

Formula of Ammonium phosphate - (NH4)3PO4

Molecular Weight of Ammonium phosphate - 149.086741 [g/mol]

Molecular Formula of Ammonium phosphate - H12N3O4P

Exact Mass of Ammonium phosphate - 149.056542

MonoIsotopic Mass of Ammonium phosphate - 149.056542

Topological Polar Surface Area of Ammonium phosphate - 89.2

H-Bond Donor of Ammonium phosphate: 3

H-Bond Acceptor of Ammonium phosphate: 4

IUPAC Name of Ammonium phosphate: triazanium phosphate

Ammonium phosphate is referred as the salt of ammonia & phosphoric acid. Ammonium phosphate has the formula (NH4)3PO4 & it consists of ammonium cations & phosphate anion. Ammonium phosphate is obtained as a crystalline powder upon mixing concentrated solutions of ammonia & phosphoric acid, or on the addition of excess of ammonia to the acid phosphate (NH4)2(HPO4). Ammonium phosphate is soluble in water, & the aqueous solution on boiling loses ammonia & the acid phosphate (NH4) (H2PO4) is formed.

Ammonium phosphate is mostly used as an ingredient in fertilizers as a high source of elemental nitrogen. Ammonium phosphate is also used as a flame retardant in thermoplastic compositions

In our next blog we shall learn about stages of evolution I hope the above explanation was useful.Keep reading and leave your comments.

Thursday, September 16, 2010

absorption and adsorption

Let us learn about absorption and adsorption

Adsorption is referred as the process of attraction of atoms or molecules from an adjacent gas or liquid to an exposed solid surface. Such attraction forces support the molecules into layers onto the existent surface.

Absorption generally refers to 2 phenomena which are largely unrelated. In 1 case, it refers to when molecules, atoms, or ions enter some bulk phase - gas, liquid or solid material. For instance, a sponge absorbs water when ever it is dry.

Absorption defined as the process by which the energy of a photon is taken up by another entity, best example, by an atom whose valence electrons make transition between 2 electronic energy levels. The photon is destroyed in the method. The absorbed energy can be re-emitted as radiant energy or transformed into heat energy. The absorption of light during wave propagation is often known as attenuation. The tools of spectroscopy in chemistry are sourced on the absorption of photons by molecules & atoms.

Adsorption is similar, but refers to a surface rather than a volume: adsorption is a process which occur when a gas or liquid solute accumulates on the surface of a solid or, more rarely, a liquid, forming a molecular or atomic film. Adsorption is different from absorption, in that a substance diffuses into a liquid or solid to form a solution.


In our next blog we shall learn about lithium extraction I hope the above explanation was useful.Keep reading and leave your comments.


Wednesday, September 15, 2010

non conventional energy sources

Let us learn about non conventional energy sources

Non-conventional energy sources are defined as the energy sources which gives non-renewable energy.


Non conventional energy sources are referred the energies that are not replaced by any new identical 1 in the place of the used ones.


Fossil fuels are the Best example for the non-conventional energy source. You cannot replace the used fuels by new 1 in the same source. Consider the sources to a pencil, if you sharpen it, the size reduces, and you cannot increase the size of used sharpened pencil. Similarly we cannot refill the source, if you take the fuel the amount of fuel decreases, 1 day it will be completely exhausted.


Some other examples for the non-conventional energy sources tar heavy oil, oil shale, sands, and bio-fuels.


In our next blog we shall learn about gas stations near me I hope the above explanation was useful.Keep reading and leave your comments.



examples of inertia

Let us learn about examples of inertia

Inertia is referred as the resistance of any physical object to a change in its state of motion or rest. Inertia is represented numerically by an object's mass


Best Examples of Inertia of Rest

  • A passenger standing in a bus leans backwards as soon as the bus starts all of a sudden
  • Fruits & flowers fall down when the branches of a tree are shaken by wind
  • particles of Dust on a carpet falls when we beat the carpet with a stick & or with hard object

In our next blog we shall learn about autotrophic nutrition I hope the above explanation was useful.Keep reading and leave your comments.


Monday, September 13, 2010

ecological balance

Let us learn about ecological balance

What is ecological balance?

Ecological balance is to preserve natural resources & nature & to keep the nature more natural. In Canada, an initiative was taken to grow more & more trees across the country, to maintain the balance of oxygen & to overcome the problem of deforestation.


In India, a telecom company took an initiative to conserve the tiger breed across the countries, which have been counted as 1411.


people try to save water or paper & many other natural & repressible resources just to maintain the balance in the ecology.

The "ecological balance" is refers to the balance into the carbon cycle between the plants that use CO2 & the processes that produce it. Chopping down a tree & burning it is a zero-sum gain as long as you allow a new tree to grow. This is the way it was prior to the industrial revolution.


In our next blog we shall learn about xor truth table I hope the above explanation was useful.Keep reading and leave your comments.


Sunday, September 12, 2010

abiotic factors of the tundra

Let us learn about abiotic factors of the tundra

Physical, or nonliving, factors which shapes an ecosystem

Strong Winds, little precipitation rainfall

Short summer days

Very long and cold winters, poor soil

Permafrost-a layer of permanently frozen subsoil

Temperature cold in winter
mineral composition

Season long & cold winters; short summer days
altitude determines whether it is an arctic tundra or an alpine tundra
cloud coverage, angle of sunlight
wind strong in the tundra
permafrost only top layer of soil thaws in summer; so trees cannot grow
presence of rocks


In our next blog we shall learn about icwai question papers I hope the above explanation was useful.Keep reading and leave your comments.

Wednesday, September 8, 2010

Anomeric

Let us learn about anomeric

Anomeric is the method of conversion of 1 anomer to the other. Anomerization is the anomeric analogue of epimerization.

The anomeric centre is in hemiacetals the anomeric carbon C-1 that is attached to the hemiacetal oxygen & in hemiketals carbon C-2, attached to the hemiketal oxygen. In aldohexoses & smaller carbohydrates the anomeric reference atom is the furthest chiral centre in the ring. In α-D-glucopyranose the reference atom is C-5.


In our next blog we shall learn about ph connect I hope the above explanation was useful.Keep reading and leave your comments.

Tuesday, September 7, 2010

decantation

Let us learn about decantation

Decantation is the method by that a clear liquid obtained after sedimentation, is transferred into another container, without disturbing the settled particles.

Decantation is a method for the separation of mixtures. Decantation is a very quick process for separating a mixture of a liquid & a heavier solid

Decantation is the act of pouring off clear liquor gently from its lees or sediment, or from 1 vessel into another.

In our next blog we shall learn about grade 12 chemistry I hope the above explanation was useful.Keep reading and leave your comments.


Monday, September 6, 2010

reactivity of metals

Let us learn about reactivity of metals

The activity series or reactivity series is an empirical series of metals, in order of "reactivity" from highest to lowest

Some substances react very easily than other metals then we say they are more reactive. Some metals are very reactive than other metals.

Some halogen elements are very reactive than other metals.

Different metals have different levels of reactivity. Whether the metals are made to react with water, oxygen, acids or any other chemical, the order of reactivity of metals is always similar. Those the reactivity is a basic property of the metal rather than the other chemical.

In our next blog we shall learn about azimuthal quantum number I hope the above explanation was useful.Keep reading and leave your comments.

Sunday, September 5, 2010

chemistry tutor

Let us learn about chemistry tutor

Chemistry deals with finding what substances are made of, what type of transformations take place, & different chemically related facts about a certain organism or substance Physical Chemistry is all about the patterns of chemical behavior in chemical reactions under various conditions that result from the physical properties & chemical properties of substances. A great deal of physical chemistry involves measurement of some kind.

A Chemistry Tutor will help student get the most out of Chemistry no matter what level student are studying. Chemistry Tutors can help identify areas student need to work on & bring their expertise & experience to bear & quickly bring student up to speed.

A chemistry tutor can work with student on topics such as:

  • Biochemistry
  • Inorganic Chemistry
  • Organic Chemistry
  • Physical Chemistry
  • Analytical Chemistry

General science tutors may suit student better if student are studying a more basic level of Chemistry. They will be able to help relate what students are working on with other areas of science such as Biology & Physics.

In our next blog we shall learn about study island math I hope the above explanation was useful.Keep reading and leave your comments.

Thursday, September 2, 2010

pure substance

Let us learn about pure substance

Pure substance is a substance with out adulteration. It cannot be separated by physical process. It can be separated by chemical process

A pure substance is a type of matter which cannot be separated into other type of matter by any physical or chemical process. A pure substance has the same color, taste, texture & composition. A pure substance is made out of a same particle.

A pure substance is a form of matter which has a definite composition & distinct properties.


In our next blog we shall learn about nonelectrolyte I hope the above explanation was useful.Keep reading and leave your comments.

Wednesday, September 1, 2010

activity series of metals

Let us learn about activity series of metals

The Activity Series of the metals is an invaluable help to predicting the products of replacement reactions. Activity series of metals also can be applied as an aid in predicting products of some other reactions.

Each element on the inventory replaces from a compound any of the elements below it.

* The 1st 5 elements lithium sodium are known as active metals & they react with cold water to produce the hydroxide & hydrogen gas.

* The next 4 metals magnesium - chromium are considered active metals & they will react with very hot water or steam to form the oxide & hydrogen gas.

* The oxides of all of these 1st metals resist reduction by H2.

* The next 6 metals iron - lead replace hydrogen from HCl & dil. sulfuric & nitric acids. Their oxides undergo reduction by heating with H2, carbon, & carbon monoxide.

* The metals lithium copper, can blend directly with oxygen to form the oxide.

* The last 5 metals mercury - gold are often found free in nature, their oxides decompose with mild heating, & they form oxides indirectly.

In our next blog we shall learn about air gas locations I hope the above explanation was useful.Keep reading and leave your comments.