Sunday, December 16, 2007

மினரல் வாட்டர் பாட்டிலை தொடர்ந்து பயன்படுத்தினால் ` கேன்சர்' தாக்கும்

மினரல் வாட்டர் பாட்டிலை தொடர்ந்து பயன்படுத்தினால் ` கேன்சர்' தாக்கும் . சுகாதார அதிகாரி எச்சரிக்கை
http://www.dailythanthi.com/article.asp?NewsID=380309&disdate=12/13/2007&advt=2
திருச்சி, டிச .13- மினரல் வாட்டர் பாட்டிலை தொடர்ந்து பயன்படுத்தினால் கேன்சர் நோய் தாக்கும் என்று சுகாதாரப்பணிகள் துணை இயக்குனர் எச்சரிக்கை விடுத்துள்ளார் . திருச்சி மாவட்ட பொது சுகாதாரத்துறை துணை இயக்குனர் வீரபாண்டியன் திருச்சி மாவட்டத்திற்குட்பட்ட ஆரம்ப சுகாதார நிலையங்களில் நேரில் ஆய்வு நடத்தினார். ……, ……, ……
கேன்சர் நோய் தாக்கும்
பின்னர் சுகாதாரப்பணிகள் துணை இயக்குனர் வீரபாண்டியன் கூறுகையில்,
பாட்டில்களில் விற்கப்படும் மினரல் வாட்டரை இப்போது பலர் அதிகமான அளவில் வாங்கி பயன்படுத்தி வருகிறார்கள்.
அதில் தவறு இல்லை.
இவ்வாறு வாங்கும் மினரல் வாட்டர் பாட்டில்களை பயன்படுத்திய பின் பலர் தொடர்ந்து தண்ணீர் வைத்துக்கொள்வதற்காக அந்த பாட்டில்களை உபயோகப்படுத்துகிறார்கள் .
இந்த பாட்டில்கள் ஒரு குறிப்பிட்ட வேதிப்பொருட்களின் கலவையால் உருவாக்கப்பட்டுள்ளன.
இவற்றில் தொடர்ந்து தண்ணீரை ஊற்றி வைத்து குடித்து வந்தால் கேன்சர் தாக்கும் அபாயம் உள்ளதாக ஆராய்ச்சிகளில் கண்டுபிடிக்கப்பட்டுள்ளது .
எனவே மினரல் வாட்டர் பாட்டிலில் உள்ள தண்ணீரை குடித்த பின் அதனை தொடர்ந்து பயன்படுத்துவதை தவிர்க்க வேண்டும்.
குடிநீரை எடுத்து செல்வதற்காக அதற்கென தனிப்பட்ட முறையில் தயாரிக்கப்பட்டு கடைகளில் விற்கப்படும் பாட்டில்களையே பொதுமக்கள் வாங்கி பயன்படுத்த வேண்டும் என்றார்.

Saturday, December 15, 2007

Qur'an describes clouds





Have you not seen how God makes the clouds move gently, then joins them together, then makes them into a stack, and then you see the rain come out of it....



(Surah: An-Nur (24); Ayah # 43)






The Qur’an on Clouds:

Scientists have studied cloud types and have realized that rain clouds are formed and shaped according to definite systems and certain steps connected with certain types of wind and clouds.


One kind of rain cloud is the cumulonimbus cloud. Meteorologists have studied how cumulonimbus clouds are formed and how they produce rain, hail, and lightning.

They have found that cumulonimbus clouds go through the following steps to produce rain:

1) The clouds are pushed by the wind: Cumulonimbus clouds begin to form when wind pushes some small pieces of clouds (cumulus clouds) to an area where these clouds converge (see figures 17 and 18).



Figure 17: Satellite photo showing the clouds moving towards the convergence areas B, C, and D. The arrows indicate the directions of the wind. (The Use of Satellite Pictures in Weather Analysis and Forecasting, Anderson and others, p. 188.) (Click on the image to enlarge it.)



Figure 18: Small pieces of clouds (cumulus clouds) moving towards a convergence zone near the horizon, where we can see a large cumulonimbus cloud. (Clouds and Storms, Ludlam, plate 7.4.) (Click on the image to enlarge it.)


2) Joining: Then the small clouds join together forming a larger cloud1 (see figures 18 and 19).



Figure 19: (A) Isolated small pieces of clouds (cumulus clouds). (B) When the small clouds join together, updrafts within the larger cloud increase, so the cloud is stacked up. Water drops are indicated by ·. (The Atmosphere, Anthes and others, p. 269.) (Click on the image to enlarge it.)


3) Stacking: When the small clouds join together, updrafts within the larger cloud increase. The updrafts near the center of the cloud are stronger than those near the edges.2 These updrafts cause the cloud body to grow vertically, so the cloud is stacked up (see figures 19 (B), 20, and 21). This vertical growth causes the cloud body to stretch into cooler regions of the atmosphere, where drops of water and hail formulate and begin to grow larger and larger. When these drops of water and hail become too heavy for the updrafts to support them, they begin to fall from the cloud as rain, hail, etc.3


Figure 20: A cumulonimbus cloud. After the cloud is stacked up, rain comes out of it. (Weather and Climate, Bodin, p.123.)


Figure 21: A cumulonimbus cloud. (A Colour Guide to Clouds, Scorer and Wexler, p. 23.)


God has said in the Quran:

Have you not seen how God makes the clouds move gently, then joins them together, then makes them into a stack, and then you see the rain come out of it.... (Quran, 24:43)

Meteorologists have only recently come to know these details of cloud formation, structure, and function by using advanced equipment like planes, satellites, computers, balloons, and other equipment, to study wind and its direction, to measure humidity and its variations, and to determine the levels and variations of atmospheric pressure.4

The preceding verse, after mentioning clouds and rain, speaks about hail and lightning:

....And He sends down hail from mountains (clouds) in the sky, and He strikes with it whomever He wills, and turns it from whomever He wills. The vivid flash of its lightning nearly blinds the sight. (Quran, 24:43)

Meteorologists have found that these cumulonimbus clouds, that shower hail, reach a height of 25,000 to 30,000 ft (4.7 to 5.7 miles),5 like mountains, as the Quran said, “...And He sends down hail from mountains (clouds) in the sky...” (see figure 21 above).


This verse may raise a question. Why does the verse say “its lightning” in a reference to the hail? Does this mean that hail is the major factor in producing lightning? Let us see what the book entitled Meteorology Today says about this. It says that a cloud becomes electrified as hail falls through a region in the cloud of supercooled droplets and ice crystals. As liquid droplets collide with a hailstone, they freeze on contact and release latent heat. This keeps the surface of the hailstone warmer than that of the surrounding ice crystals. When the hailstone comes in contact with an ice crystal, an important phenomenon occurs: electrons flow from the colder object toward the warmer object. Hence, the hailstone becomes negatively charged. The same effect occurs when supercooled droplets come in contact with a hailstone and tiny splinters of positively charged ice break off. These lighter positively charged particles are then carried to the upper part of the cloud by updrafts. The hail, left with a negative charge, falls towards the bottom of the cloud, thus the lower part of the cloud becomes negatively charged. These negative charges are then discharged as lightning.6 We conclude from this that hail is the major factor in producing lightning.

This information on lightning was discovered recently. Until 1600 AD, Aristotle’s ideas on meteorology were dominant. For example, he said that the atmosphere contains two kinds of exhalation, moist and dry. He also said that thunder is the sound of the collision of the dry exhalation with the neighboring clouds, and lightning is the inflaming and burning of the dry exhalation with a thin and faint fire.7 These are some of the ideas on meteorology that were dominant at the time of the Quran’s revelation, fourteen centuries ago.


Footnotes:

(1) See The Atmosphere, Anthes and others, pp. 268-269, and Elements of Meteorology, Miller and Thompson, p. 141.

(2) The updrafts near the center are stronger, because they are protected from the cooling effects by the outer portion of the cloud.

(3) See The Atmosphere, Anthes and others, p. 269, and Elements of Meteorology, Miller and Thompson, pp. 141-142.

(4) See Ee’jaz al-Quran al-Kareem fee Wasf Anwa’ al-Riyah, al-Sohob, al-Matar, Makky and others, p. 55.

(5) Elements of Meteorology, Miller and Thompson, p. 141.

(6) Meteorology Today, Ahrens, p. 437.

(7) The Works of Aristotle Translated into English: Meteorologica, vol. 3, Ross and others, pp. 369a-369b.


The Qur’an on Deep Seas and Internal Waves:

Allah has said in the Quran:


Or (the unbelievers’ state) is like the darkness in a deep sea. It is covered by waves, above which are waves, above which are clouds. Dark nesses, one above another. If a man stretches out his hand, he cannot see it.... (Quran, 24:40)

This verse mentions the darkness found in deep seas and oceans, where if a man stretches out his hand, he cannot see it. The darkness in deep seas and oceans is found around a depth of 200 meters and below. At this depth, there is almost no light (see figure 15). Below a depth of 1000 meters there is no light at all.1 Human beings are not able to dive more than forty meters without the aid of submarines or special equipment. Human beings cannot survive unaided in the deep dark part of the oceans, such as at a depth of 200 meters.



Figure 15: Between 3 and 30 percent of the sunlight is reflected at the sea surface. Then almost all of the seven colors of the light spectrum are absorbed one after another in the first 200 meters, except the blue light. (Oceans, Elder and Pernetta, p. 27.)


Scientists have recently discovered this darkness by means of special equipment and submarines that have enabled them to dive into the depths of the oceans.

We can also understand from the following sentences in the previous verse, “...in a deep sea. It is covered by waves, above which are waves, above which are clouds....”, that the deep waters of seas and oceans are covered by waves, and above these waves are other waves. It is clear that the second set of waves are the surface waves that we see, because the verse mentions that above the second waves there are clouds. But what about the first waves? Scientists have recently discovered that there are internal waves which “occur on density interfaces between layers of different densities.”2 (see figure 16).


Figure 16: Internal waves at interface between two layers of water of different densities. One is dense (the lower one), the other one is less dense (the upper one). (Oceanography, Gross, p. 204.)


The internal waves cover the deep waters of seas and oceans because the deep waters have a higher density than the waters above them. Internal waves act like surface waves. They can also break, just like surface waves. Internal waves cannot be seen by the human eye, but they can be detected by studying temperature or salinity changes at a given location.3


Footnotes:

(1) Oceans, Elder and Pernetta, p. 27.

(2) Oceanography, Gross, p. 205.

(3) Oceanography, Gross, p. 205.

Wednesday, December 5, 2007

Scientific Calculators

Visit www.mycalculations.com for the most helpful scientific calculators for Drilling/Petroleum Engineers, Geoscientists and others

Losing virginity early or late tied to health risks

People who start having sex at a younger or older than average age appear to be at greater risk of developing sexual health problems later in life, a new study suggests.

http://news.yahoo.com/s/nm/20071204/hl_nm/virginity_health_dc