Aug 182012
 

Carbohydrates are one of the most important nutrients needed for the development of the body. It is a nutrient which directly helps in the production of energy which is vital for the functioning of the organs of the body. Carbohydrates are the organic compounds of carbon (C), hydrogen (H) and oxygen (O), where the hydrogen and oxygen are present in the ratio of 2:1, as in water. They act as sources of energy for the cells. The carbohydrates can simply be classified into three categories which are monosaccharides, disaccharides and polysaccharides. They are also called ‘saccharides’. In Greek language, the word ‘sakcharon’ means sugar.

1. Monosaccharides: Monosaccharides are the simplest form of carbohydrates with only one simple sugar. Based on the number of carbon atoms, the members of monosaccharide are known as trioses, tetroses, pentoses, hexoses and heptoses. Glucose, fructose and galactose are the most common types of hexoses. They are highly soluble in water and sweet to taste.

They are also designated as aldoses and ketoses depending on whether they contain aldehyde of ketone groups. All sugars contain the C = O group. This is called a carbonyl group.. When carbonyl group is terminal in position and is jointed to at least one hydrogen atom, it is designated as aldehyde. But when it is sub-terminal in position or it is present between carbon atoms, it is designated as ketones.

2. Disaccharides: These are formed by two molecules of the monosaccharides with release of a water molecule. The most common disaccharides are maltose, sucrose and lactose. They are soluble in water and sweet in taste.

Sucrose is found in the juice of plants such as sugarcane, sugar beet, pineapple and carrot roots. Lactose or milk sugar occurs to about 5% in cow’s milk and 7% in human milk.

3. Polysaccharides: Polysaccharides are the condensation product of a large number of monosaccharides. Shorter polysaccharides with 2-10 monomers are called oligosaccharides. Polysaccharides are mostly insoluble in water and not sweet in taste. The most common polysaccharides found in living organisms are glycogen, starch and cellulose. Starch is the storage food of plant. Glycogen is the storage food of animal and also found in blue green algae, fungi and bacteria. Cellulose is an important constituent of plant cell wall.

Cellulose is the main constituent of paper and cloth. It is also the basis for the manufacture of several synthetic fibres like rayon.

Aug 162012
 

As the present world has achieved much success in the field of information technology, everyday new, innovative and useful things that make human life easier and luxurious are being released. Many electronic gadgets like mobile phones, personal computers etc. are making people attracted. So, most of the people of the world are great fans of such gadgets. Here’s a news for all the gadget lovers.

If you are thinking of getting a new mobile phone or a tablet PC or a computer immediately then it would be better for you to wait for sometime before buying them. It is because there are many new and fresh gadgets waiting to arrive in the market. These gadgets will make you feel that your gadgets are already outdated. Now let us know about the gadgets which are being released soon.

1. I Phone 5: Apple’s most amazing and famous product, I Phone’s new version is soon going to be released. It is believed that I Phone 5 will be released between 5th September to 12th September. Though Apple hasn’t spread any information about it, many agencies and sources say that I Phone’s new version will be released within 12th September, 2012.

Talking about the features in I Phone 5, this version of I Phone will not have that much new and interesting feature than that of I Phone 4S. But it is said that this version will surely have something special and upgraded. This version of I Phone will have almost 4 inches wide screen display. This is the largest screen that any version of I Phone has ever got. Similarly, another important feature of I Phone 5 is the inbuilt Youtube application through which the user can easily get live streaming videos. This phone consists of IOS 6 operating system. Sources say that this version of I Phone is going to be made slimmer that other versions. While talking about Data Transfer, this phone will have Advanced Near Field Communication (NFC) feature rather than Bluetooth.

2. Samsung Galaxy Note 2: With the releasing date as August 29th, 2012, Samsung Galaxy Note’s new version has taken over the minds of gadget lovers of all over the world. Being little bit smaller than Tablet PC and larger than mobile phone, Samsung Galaxy Note 2 is also known as Flablet. With the success earned by Samsung Galaxy Note, Samsung became more encouraged to release the new and upgraded version of it. So, it created the new version of Galaxy Note which is already released in some countries like UAE, UK etc. Since this phone consists of a 10.1 inch wide screen, it is even called as Samsung Galaxy Note 10.1. Experts say that this version of Galaxy Note will surely challenge Apple’s I Phone and I Pad which are taking over the globe in the present time.

3. Windows 8 Tablet and PC: Along with the plan of Microsoft to release new operating¬† system Windows 8, Microsoft is planning to bring out new tablets and PCs for making this operating system successful and popular. Windows 8 is going to be released on 26th October, 2012. With this news, one of the world’s most famous computer producers, Lenovo has already decided to bring a tablet PC of 10.1 inches whose weight will be 600 grams and thickness will be 9.8 mm. This tablet will work on Intel’s Atom Processor. Not only Lenovo, but also other computer manufacturers are also planning to create PCs and tablets which will be compatible with Microsoft’s Windows 8.

4. Nokia’s Windows 8 Phone: It is guessed that Nokia will release its new Windows 8 platformed phone on its anniversary on 5th September. On that day, Nokia is going to organize a campaign called Nokia World where it is believed that Nokia will launch its new phones. This new Windows 8 phone will be launched along with Lumia series, which is one of the best series of mobile phones created by Nokia. However, the production and sales of this Windows 8 phone will start only after October, 2012.