Polyphenols are a large family of naturally occurring organic compounds characterized by multiples of phenol units. They are abundant in plants and structurally diverse. Polyphenols include flavonoids, tannic acid, and ellagitannin, some of which have been used historically as dyes and for tanning garments.
The term polyphenol is not well defined, but it is generally agreed that they are natural products "having a polyphenol structure (i.e., several hydroxyl groups on aromatic rings)" including four principal classes: "phenolic acids, flavonoids, stilbenes, and lignans".

Flavonoids include flavones, flavonols, flavanols, flavanones, isoflavones, proanthocyanidins, and anthocyanins. Particularly abundant flavanoids in foods are catechin (tea, fruits), hesperetin (citrus fruits), cyanidin (red fruits and berries), daidzein (soybean), proanthocyanidins (apple, grape, cocoa), and quercetin (onion, tea, apples).
Phenolic acid include caffeic acid
Lignans are polyphenols derived from phenylalanine found in flax seed and other cereals.

A database is a collection of logically related information/data, which is available for one or more users organised in a way, so that it can be easily accessed, managed and updated. It.is actually a place, where related piece of information is stored and various operations can be performed on it by the user.

A database is basically a computer based record/data/information keeping system. Data is raw, unorganized facts and entities relevant to the user need to be processed such as a digital representation of text, numbers, graphical images or sound. The data are stored in such a way that they are independent of the programs used by the people for accessing the data.

A composite key, with regards to social databases, is a blend of at least two columns in a table that can be utilized to remarkably recognize each row in the table. Uniqueness is possibly ensured when the columns are consolidated; when taken separately the columns don't ensure uniqueness

Domestic Data Entry Operator in the IT-ITeS Industry is also known as Data Entry Operator. Individuals are responsible to provide daily work reports and work on daily hour bases. The individual is responsible for electronic entry of data from the client side to the office site or viceversa. Individual tasks vary depending on the size and structure of the organization. This job requires the individual to have thorough knowledge of various technology trends and processes as well as have updated knowledge about database management systems and IT initiatives. The individual should have fast and accurate typing/data encoding. This job involves working in a personal computer, and appropriate software to enter accurate data regarding different issues like retrieving data from a computer or to a computer

Click on the given link:

<a href="http://cbseacademic.nic.in/web_material/Curriculum21/Class_X/402-INFO_TECH_X.pdf" ping="/url?sa=t&source=web&rct=j&url=http://cbseacademic.nic.in/web_material/Curriculum21/Class_X/402-INFO_TECH_X.pdf&ved=2ahUKEwjNioCUidnsAhXUfH0KHRdxDmAQFjAEegQIBBAC" rel="noopener" target="_blank">INFORMATION TECHNOLOGY (402) Class X - CBSE ...</a>

A query is an inquiry into the database using the SELECT statement.These statements give you filtered data according to your conditions and specifications indicating the fields, records and summaries which a user wants to fetch from a database.

Importance of Entrepreneurship:

• Creation of Employment- Entrepreneurship generates employment. It provides an entry-level job, required for gaining experience and training for unskilled workers.
• Innovation- It is the hub of innovation that provides new product ventures, market, technology and quality of goods, etc., and increase the standard of living of people.
• Impact on Society and Community Development- A society becomes greater if the employment base is large and diversified. It brings about changes in society and promotes facilities like higher expenditure on education, better sanitation, fewer slums, a higher level of homeownership. Therefore, entrepreneurship assists the organisation towards a more stable and high quality of community life.
• Increase Standard of Living- Entrepreneurship helps to improve the standard of living of a person by increasing the income. The standard of living means, increase in the consumption of various goods and services by a household for a particular period.
• Supports research and development- New products and services need to be researched and tested before launching in the market. Therefore, an entrepreneur also dispenses finance for research and development with research institutions and universities. This promotes research, general construction, and development in the economy.

The Internet is a worldwide system of computer. networks, i.e. network of networks. Through Internet, computers become able to exchange information with each other and find diverse perspective on issues from a global audience.

A word processor is software or a device that allows users to create, edit, and print documents. It enables you to write text, store it electronically, display it on a screen, modify it by entering commands and characters from the keyboard, and print it. 

There are four types of constructive feedback:

• Negative feedback – corrective comments about past behaviour. Focuses on behaviour that wasn’t successful and shouldn’t be repeated.
• Positive feedback – affirming comments about past behaviour. Focuses on behaviour that was successful and should be continued.
• Negative feed-forward – corrective comments about future performance. Focuses on behaviour that should be avoided in the future.
• Positive feed-forward – affirming comments about future behaviour. Focused on behaviour that will improve performance in the future.

Communications is a continuous process which mainly involves three elements viz. sender, message, and receiver. The elements involved in the communication process are explained below in detail:

1. Sender

The sender or the communicator generates the message and conveys it to the receiver. He is the source and the one who starts the communication

2. Message

It is the idea, information, view, fact, feeling, etc. that is generated by the sender and is then intended to be communicated further.

3. Encoding

The message generated by the sender is encoded symbolically such as in the form of words, pictures, gestures, etc. before it is being conveyed.

4. Media

It is the manner in which the encoded message is transmitted. The message may be transmitted orally or in writing. The medium of communication includes telephone, internet, post, fax, e-mail, etc. The choice of medium is decided by the sender.

5. Decoding

It is the process of converting the symbols encoded by the sender. After decoding the message is received by the receiver.

6. Receiver

He is the person who is last in the chain and for whom the message was sent by the sender. Once the receiver receives the message and understands it in proper perspective and acts according to the message, only then the purpose of communication is successful.

7. Feedback

Once the receiver confirms to the sender that he has received the message and understood it, the process of communication is complete.

8. Noise

It refers to any obstruction that is caused by the sender, message or receiver during the process of communication. For example, bad telephone connection, faulty encoding, faulty decoding, inattentive receiver, poor understanding of message due to prejudice or inappropriate gestures, etc.