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Thursday, July 12, 2007

Benefits of smile

1) Smile shows friendship
2) Smile make new friends
3) Smile makes other people's day brighter
4) Smile improves your day
5) Smile looks better than a frown

6) Smile Puts others at ease
7) Smile always enjoyable to give and receive
8) Smile leaves favorable impressions
9) Smile makes you look happy, confident, and self-assured
10) Smile could be the start of a lifetime relationship!

Eucaryotic Cell Organelles

Nucleus:

The nucleus is the most obvious organelle in any eukaryotic cell. It is enclosed in a double membrane and communicates with the surrounding cytosol via numerous nuclear pores. Within the nucleus is the DNA responsible for providing the cell with its unique characteristics. The DNA is similar in every cell of the body, but depending on the specific cell type, some genes may be turned on or off - that's why a liver cell is different from a muscle cell, and a muscle cell is different from a fat cell. When a cell is dividing, the nuclear chromatin (DNA and surrounding protein) condenses into chromosomes that are easily seen by microscopy.

Nucleolus: The prominent structure in the nucleus is the nucleolus. The nucleolus produces ribosomes, which move out of the nucleus and take positions on the rough endoplasmic reticulum where they are critical in protein synthesis.

Cytosol:

The cytosol is the "soup" within which all the other cell organelles reside and where most of the cellular metabolism occurs. Though mostly water, the cytosol is full of proteins that control cell metabolism including signal transduction pathways, glycolysis, intracellular receptors, and transcription factors.

Cytoplasm:

This is a collective term for the cytosol plus the organelles suspended within the cytosol.


Centrosome:

The centrosome, or MICROTUBULE ORGANIZING CENTER (MTOC), is an area in the cell where microtubles are produced. Plant and animal cell centrosomes play similar roles in cell division, and both include collections of microtubules, but the plant cell centrosome is simpler and does not have centrioles.
During animal cell division, the centrioles replicate (make new copies) and the centrosome divides. The result is two centrosomes, each with its own pair of centrioles. The two centrosomes move to opposite ends of the nucleus, and from each centrosome, microtubules grow into a "spindle" which is responsible for separating replicated chromosomes into the two daughter cells.

Centriole (animal cells only):
Each centriole is a ring of nine groups of fused microtubules. There are three microtubules in each group. Microtubules (and centrioles) are part of the cytoskeleton. In the complete animal cell centrosome, the two centrioles are arranged such that one is perpendicular to the other.

Golgi:
The Golgi apparatus is a membrane-bound structure with a single membrane. It is actually a stack of membrane-bound vesicles that are important in packaging macromolecules for transport elsewhere in the cell. The stack of larger vesicles is surrounded by numerous smaller vesicles containing those packaged macromolecules. The enzymatic or hormonal contents of lysosomes, peroxisomes and secretory vesicles are packaged in membrane-bound vesicles at the periphery of the Golgi apparatus.

Lysosome:

Lysosomes contain hydrolytic enzymes necessary for intracellular digestion. They are common in animal cells, but rare in plant cells. Hydrolytic enzymes of plant cells are more often found in the vacuole.

Peroxisome:
Peroxisomes are membrane-bound packets of oxidative enzymes. In plant cells, peroxisomes play a variety of roles including converting fatty acids to sugar and assisting chloroplasts in photorespiration. In animal cells, peroxisomes protect the cell from its own production of toxic hydrogen peroxide. As an example, white blood cells produce hydrogen peroxide to kill bacteria. The oxidative enzymes in peroxisomes break down the hydrogen peroxide into water and oxygen.

Secretory Vesicle:

Cell secretions - e.g. hormones, neurotransmitters - are packaged in secretory vesicles at the Golgi apparatus. The secretory vesicles are then transported to the cell surface for release.

Cell Membrane:
Every cell is enclosed in a membrane, a double layer of phospholipids (lipid bilayer). The exposed heads of the bilayer are "hydrophilic" (water loving), meaning that they are compatible with water both within the cytosol and outside of the cell. However, the hidden tails of the phosopholipids are "hydrophobic" (water fearing), so the cell membrane acts as a protective barrier to the uncontrolled flow of water. The membrane is made more complex by the presence of numerous proteins that are crucial to cell activity. These proteins include receptors for odors, tastes and hormones, as well as pores responsible for the controlled entry and exit of ions like sodium (Na+) potassium (K+), calcium (Ca++) and chloride (Cl-).

Mitochondria:
Mitochondria provide the energy a cell needs to move, divide, produce secretory products, contract - in short, they are the power centers of the cell. They are about the size of bacteria but may have different shapes depending on the cell type. Mitochondria are membrane-bound organelles, and like the nucleus have a double membrane. The outer membrane is fairly smooth. But the inner membrane is highly convoluted, forming folds (cristae) as seen in the cross-section, above. The cristae greatly increase the inner membrane's surface area. It is on these cristae that food (sugar) is combined with oxygen to produce ATP - the primary energy source for the cell.

Vacuole:
A vacuole is a membrane-bound sac that plays roles in intracellular digestion and the release of cellular waste products. In animal cells, vacuoles are generally small. Vacuoles tend to be large in plant cells and play several roles: storing nutrients and waste products, helping increase cell size during growth, and even acting much like lysosomes of animal cells. The plant cell vacuole also regulates turgor pressure in the cell. Water collects in cell vacuoles, pressing outward against the cell wall and producing rigidity in the plant. Without sufficient water, turgor pressure drops and the plant wilts.

Cell Wall (plant cells only)
: Plant cells have a rigid, protective cell wall made up of polysaccharides. In higher plant cells, that polysaccharide is usually cellulose. The cell wall provides and maintains the shape of these cells and serves as a protective barrier. Fluid collects in the plant cell vacuole and pushes out against the cell wall. This turgor pressure is responsible for the crispness of fresh vegetables.

Chloroplast (plant cells only):
Chloroplasts are specialized organelles found in all higher plant cells. These organelles contain the plant cell's chlorophyll responsible for the plant's green color. Chloroplasts have a double outer membrane. Within the stroma are other membrane structures - the thylakoids. Thylakoids appear in stacks called "grana" (singular = granum).

Smooth Endoplasmic Reticulum:

Throughout the eukaryotic cell, especially those responsible for the production of hormones and other secretory products, is a vast network of membrane-bound vesicles and tubules called the endoplasmic reticulum, or ER for short. The ER is a continuation of the outer nuclear membrane and its varied functions suggest the complexity of the eukaryotic cell.
The smooth endoplasmic reticulum is so named because it appears smooth by electron microscopy. Smooth ER plays different functions depending on the specific cell type including lipid and steroid hormone synthesis, breakdown of lipid-soluble toxins in liver cells, and control of calcium release in muscle cell contraction.

Rough Endoplasmic Reticulum:
Rough endoplasmic reticulum appears "pebbled" by electron microscopy due to the presence of numerous ribosomes on its surface. Proteins synthesized on these ribosomes collect in the endoplasmic reticulum for transport throughout the cell.

Ribosomes:
Ribosomes are packets of RNA and protein that play a crucial role in both prokaryotic and eukaryotic cells. They are the site of protein synthesis. Each ribosome comprises two parts, a large subunit and a small subunit. Messenger RNA from the cell nucleus is moved systematically along the ribosome where transfer RNA adds individual amino acid molecules to the lengthening protein chain.

Cytoskeleton:

As its name implies, the cytoskeleton helps to maintain cell shape. But the primary importance of the cytoskeleton is in cell motility. The internal movement of cell organelles, as well as cell locomotion and muscle fiber contraction could not take place without the cytoskeleton. The cytoskeleton is an organized network of three primary protein filaments:

- microtubules
- actin filaments (microfilaments)
- intermediate fibers

Winning Hearts

Here are 11 pieces of advice to help you in winning others hearts. My pieces of advice are like arrows that aim at shooting hearts as its only target. I mean here, to be the virtuous merits, that captivate others hearts and help in overcoming imperfections. Actually, such merits have their own effective power in charming hearts.
O you who are in love with Allah (subhanahu wa ta’ala) and your brothers in Islam,
here are the arrows; be careful with them, try hard to be a clever shooter…
And pray to Allah (subhanahu wa ta’ala) to help you.


Smile:

It is the first arrow and the fastest of them all. It is like the salt for food. It is also regarded as a kind of worship and alms-giving as is mentioned in a hadith “Smiling at your brother’s face is as charity (Sadaqa)”. Abdullah ibn al Harith tells us about the Prophet (peace be upon him) saying that he had never seen someone smile at the other’s face as the Prophet Muhammad (peace be upon him) used to do.
Be always the one who initiates greetings:
This arrow is the one that lets you to be in the innermost depths of the others hearts. This arrow needs a skillful shooter. The needed skills are the hearty smile, the warm shaking of hands and the friendly welcoming to the other. Being successfully achieved, such kinds of skills are going to be rewarded, referring to the hadith: “In greetings, the better is he who initiates greeting the other”.
Umar al Nadi tells us that he went out once with Umar ibn al Khattab’s son. While walking, he found him saluting all whom he met, whether being old or young. Al Hasan al-Basri also said “Shaking hands strengthens brotherhood feelings”. The Prophet Muhammad (peace be upon him) said “Do not ever waste your good deeds, even by meeting your brother with a frowning face.” He said also “Shaking hands removes hatred and exchanging presents enhances love and ends enmity”.

The Presents:
It has a strange charming affection that captivates all senses. Hence, exchanging presents and gifts in different occasions is a pleasant habit however gifts should be within one’s tolerable expenses. Ibrahim al Zahri tells us about his father saying “ My father got a sum of money as a reward , in due , he asked me to send donations to his family members and friends . As we were about to finish, he asked me “Have we missed any one?” I answered “No!” He said “I think that we did.” He continued ”We have missed someone whose welcome to me was really warm. Would you please send him this sum of money?”
Look how he loved the man and wished to reward him for his warm welcome.

Be silent….speak in what benefits.
Loud voice and chattering are bad merits. You have to be sweet-worded, tender in expressing yourself. Concerning this merit, The Prophet (peace be upon him) said “The good word is a charity (is a Sadaqa).” If the good word has its own magic in winning the hearts of your enemies how powerfully it would work then with your brothers’ hearts!!
Here the Prophet’s wife addresses the enemies saying “Damn you” and the Prophet (peace be upon him) prevents her saying “Calm down. Allah likes for the matters to be dealt with gently”. He also said: “Nobility of manners and taciturnity( habitually uncommunicative or reserved in speech) and manner are the best of manners that people are ever characterized by”.

Be a good listener:
It is to listen patiently and never interrupt the speaker, as the Prophet (peace be upon him) never interrupted a speaker till he ended his speech. And he who fights for this merit gains others love and admiration, whilst on the contrary is the one who chatters and interrupts the other. Atta` tells us about how he behaves concerning this merit and says “When someone speaks to me , I listen to him as if it is the first time I have heard this subject, though I have heard it thousands of times before.

Appearance and dressing well:
You have to be careful with your appearance so as to be neat, well –dressed and sweet smelling as well. The Prophet (peace be upon him) says that Allah loves beauty to be in every thing. Umar Ibn Al Khattab said also “I like the young man who is sweetly perfumed and cleanly dressed.” Abdullah Ibn Ahmad Ibn Hanbal tells us about his father saying “ I’ve never seen some one who is as caring to the cleanliness of his dress , his hair , his moustache and other undesirable body hair as Ahmad Ibn Hanbal used to do”

Being in others favor and helping them:
Good treatment classifies you as an obedient, beloved slave of Allah as the Prophet (peace be upon him) Muhammad says “The more you are in favor of others, the more you are beloved by Allah” as Allah says in the Quran “And spend of your substance in the cause of Allah, and make not your own hands contribute to (your) destruction; but do good; for Allah loveth those who do good” (Al-Baqarah: 195)
I really wonder for that man who pays money to buy slaves, while he can buy those who are free by being good to them, for those (who treat other well) find many to be in their help.

Being Generous:
Offering money is the key for most of the closed doors that hinder you from reaching others hearts, especially in these days.
Now I will tell you a story about the magic of the merit of generosity.
In the conquest of Makkah, there was a man called “Safwan Ibn Umia”. That man ran away after making all possible means in keeping the people of Islam and after making conspiracies to kill the Prophet (peace be upon him). Later on, the Prophet (peace be upon him) forgave him and he came back asking the Prophet (peace be upon him) to give him the time of two months to think about Islam and the Prophet (peace be upon him) said “You can take four months, not just two”. In spite of being an atheist, he accompanied the Prophet (peace be upon him) in the Hunain and Al Ta’if conquests. In Al Ta`if, while the Prophet (peace be upon him) was dividing the booties of the war, he noticed that man looking longingly to a vast land in which a large number of cattle were flocking. The Prophet (peace be upon him) asked him “Do you like it?” The man eagerly answered “Yes.” The Prophet (peace be upon him) said “It is for you then.” Safwan said “Only a prophet could behave as generously as you have to me. I believe that there is no God but Allah and that Muhammad is His prophet.”
Notice how the Prophet (peace be upon him) found the missing key and succeeded in moving his heart. Some people behave stingily as if they see the ghost of poverty waiting to attack them once they think about being generous in offering money.

To have a good opinion of others and to give them an excuse :
Keeping an eye on others behavior is a bad merit that blocks your way to their hearts. On the contrary is to have a good opinion of them. So, try hard to give your brothers the excuse as much as you can. Concerning this merit, Ibn Al Mubarak says also “The believer is he who gives his brothers the excuse , and the hypocrite is he who seeks their slips.”

Express your feelings… instantly:
If you loved someone, or felt good feelings about him, don’t wait, just tell him at once. Regarding this, the Prophet (peace be upon him) said “ If you felt the brotherly love of Islam towards any ,you should immediately go and tell him about your feelings.” He added “It is the way relations are to be strongly indicated”. Such love is to be blessed by Allah if it is for Allah’s sake, not for any other personal affairs such as seeking high position, money, fame etc…. Unless this love is for Allah’s sake, it is a fruitless kind of brotherhood then. When they meet each other on the Day of Judgement, they are not brothers any more but enemies, as Allah says in the Quran “ Friends on that Day will be foes, one to another; except the Righteous.” (Az-Zukhruf: 67)
The Prophet (peace be upon him) says “A man is in the company of whom he loved.” By this he means that on the Day of Judgment, a person will be with whom he loved. So, we have to choose then between two kinds of societies, one is in enmity and the other is a kind brotherly one. Hence, we find that the Prophet (peace be upon him) associated the Makkan immigrants and the Medinan followers as brothers. It was a rare kind of brotherhood that even two brothers were to be buried together in one grave after being martyred in the conquests. Means of brotherhood was always being indicated by the Prophet (peace be upon him) as he says “You are not allowed to enter heaven till you believe in Allah and you will not be true believers unless you love each other. Shall I tell you something to do that indicates love between you? It is to spread salutation of Peace among you.”
The pity is that people are always either cruelly and harshly treating each other or extremely tender that they adore each other. Actually, it is a matter of striking a balance between heart and mind, something that differs according to the difference of characters and circumstances. It is absolutely a blessing given by Allah.

Sociability:
It is the art of being social. Here, a kind of misconception could exist between sociability and hypocrisy. Could you differentiate between the two meanings?
The Prophet (peace be upon him)’s wife, Aisha said “A man came to visit us, but to my surprise, once the Prophet (peace be upon him) saw him, he said “O…that ill- mannered man”, but the Prophet (peace be upon him) changed completely once he sat with him. He welcomed the man warmly, smiling in his face. When the man left, I asked the Prophet (peace be upon him) about what had surprised me; how he considered this man as being bad, and how he talked to him in such warmth? The Prophet (peace be upon him) answered “Have you ever seen me behaving as a hypocrite?” He added “In the Day of Judgement, the worst degrees are for those whom people deserted for being mistreated by them.”
Al Qurtubi differentiates between hypocrisy and sociability, regarding sociability as a desirable legal behavior, saying that sociability means sacrificing the worldly affairs for the sake of improving either life on earth or religion, or so as to improve both, while hypocrisy aims at sacrificing religion for the sake of the worldly affairs.

Hence, being sociable for ill-mannered people is aiming to achieve two purposes:
Firstly, to avoid being mistreated by them.
Secondly, being good to them could be guidance for them to step the right way. Compliments should be within worldly affairs only, never in religious affairs, otherwise, it will be a matter of hypocrisy.
To be sociable, means to be tender, smiling, praising to the other, intending in the meantime a legal benefit. The Prophet (peace be upon him) says “Being sociable, is as alms-giving.” Ibn Battal says also “Sociability is an ethic of the believers; it is to show open-mindedness in treating others and to delicately speak to them. Both are important elements in seeking reasons for intimacy”

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