Na + Cl → (Na+ ) +( Cl−) → NaCl
Na + Cl → (Na+ ) +( Cl−) → NaCl
Difference between Peanut butter and butter
Difference between Peanut butter and butter(Peanut butter vs butter):-
Difference between salt and iodized salt
Salt is one of the most important mineral for human life.The question will arise that what is iodized salt? Difference between salt and iodized salt; lies in the composition, dietary importance and benefits. Let’s explore more about these differences.
Salt(also called as table salt) is compound consist of sodium and chlorine(NaCl) its scientific name is sodium chloride. Salt is one of the basic taste in day to day food. Salt is also an important preservative.
Iodised salt (also spelled iodized salt) is table salt mixed with a minute amount of various iodine-containing salts. The ingestion of iodide prevents iodine deficiency.
Salt is a crystalline solid, white, pale pink or light gray in color. For consumption salt can be obtain from sea water (by mining sea beds or by evaporating sea water) or from rock deposits. Edible rock salts may be slightly greyish in color because of some other mineral content.
Salt can be used as refined or unrefined. Unrefined salt is commonly used for industrial purposes, but it can also used for cooking but unrefined salt is a bit bitter than the refined ones. Refined salt is considered more pure since other minerals are removed.
Birth (History) of Iodised (Iodized) salt:-
During the world war one, the government of the United States recognized that many young men, especially from the Midwest, were found and declared to be unfit for duty due to iodine deficiency. United States was alarmed by this development that prompts it to start a campaign and movement to have an increased dietary intake of iodine. By that time, salt were effectively added with iodine, hoping to make men healthier since salt is a basic ingredient in all types of cooking.
Soon, other countries followed suit because it clearly seemed beneficial and effective prevention move against health conditions caused by the lack of iodine in the system.
The most important iodine deficient areas in the world include the Himalayas(India) and the Andes.
Iodine deficiency affects 2 billion people and is the leading preventable cause of mental retardation and goitre. According to public health experts, iodisation of salt may be the world’s simplest and most cost-effective measure available to improve health, only costing USD$0.05(2.5 Rs) per person per year. At the World Summit for Children in 1990, a goal was set to eliminate iodine deficiency by 2000. At that time, 25% of households consumed iodised salt, a proportion that increased to 66% by 2006.
In the United States and Canada, one part of iodide is added to 10,000 parts of salt. In other countries, the ratio is one to 100,000. Iodination of water has been successfully used in some areas with adequate water supply and control of the iodination process. Iodination of irrigation water has been successfully used in China.
Difference between Salt and Iodized salt(salt vs iodized salt):-
1. Salt generally comes from the sea or rock deposits whereas iodized salt is a processed form of sea salt that is fortified with iodine.
2. Salt can be either refined or unrefined based on need whereas iodized salt is refined salt.
3. Other salts are also used for commercial and industrial purposes while iodized salt is primarily for cooking as iodine is added for dietary purposes only.
4.Salt contain only sodium chloride all other mineral are removed whereas ,iodized contain sodium chloride and salts(minerals containing iodine) of iodine.
UVA vs UVB
UVA and UVB are the UV (Ultra Violet rays) having very harmful effect in human body.Difference between UVA and UVB rays, their characteristic and effect are the essential thing we should know,as these rays causes cancers in about more than a million persons around the world and more than 250,000 Americans each year.
UV radiation is part of the light(electromagnetic spectrum) that reaches the earth from the sun. It has wavelengths shorter than visible light, making it invisible to the naked eye. These wavelengths are classified as UVA, UVB, or UVC.
UVA Rays :-
UVA having longest wavelength among the three UV rays at 320–400 nanometres (nm, or billionths of a meter). UVA is further divided into two wave ranges, UVA I, which measures 340-400 nanometres (nm, or billionths of a meter), and UVA II which extends from 320–400 nanometres.
They are present with relatively equal intensity during all daylight hours throughout the year, and can penetrate clouds and glass.
UVB wavelength ranges from 290 to 320 nm. UVB rays do not significantly penetrate glass.
With even shorter rays, most UVC is absorbed by the ozone layer and does not reach the earth.
Effect on human skin:-
UVA, which penetrates the skin more deeply than UVB, has long been known to play a major part in skin aging and wrinkling (photo aging), but until recently scientists believed it did not cause significant damage in areas of the epidermis (outermost skin layer) where most skin cancers occur.
UVA is the dominant tanning ray, and we now know that tanning, whether outdoors or in a salon, causes cumulative damage over time. A tan results from injury to the skin’s DNA; the skin darkens in an imperfect attempt to prevent further DNA damage. These imperfections, or mutations, can lead to skin cancer.
UVB, the chief cause of skin reddening and sunburn, tends to damage the skin’s more superficial epidermal layers. It plays a key role in the development of skin cancer and a contributory role in tanning and photo aging. Its intensity varies by season, location, and time of day.
The most significant amount of UVB hits the U.S. between 10 AM and 4 PM from April to October. However, UVB rays can burn and damage skin year-round, especially at high altitudes and on reflective surfaces such as snow or ice, which bounce back up to 80 percent of the rays so that they hit the skin twice. UVB rays do not significantly penetrate glass.
Sun Protection Factor (SPF) and UV Radiation
sunscreen’s efficacy has been measured by its sun protection factor, or SPF. SPF is not an amount of protection per se. Rather, it indicates how long it will take for UVB rays to redden skin when using a sunscreen, compared to how long skin would take to redden without the product.someone using a sunscreen with an SPF of 15 will take 15 times longer to redden than without the sunscreen.
An SPF 15 sunscreen screens 93 percent of the sun’s UVB rays; SPF 30 protects against 97 percent; and SPF 50, 98 percent.
To make sure you’re getting effective UVA as well as UVB coverage, look for a sunscreen with an SPF of 15 or higher, plus some combination of the following UVA-screening ingredients: stabilized a avobenzone , ecamsule ( Mexoryl™), oxybenzone, titanium dioxide, and zinc oxide.
The phrases multi spectrum, broad spectrum or UVA/UVB protection on sunscreen labels, all indicate that some UVA protection is provided along with UVB.
Prevention Guidelines for protection :-
1)Seek the shade, especially between 10 AM and 4 PM.
2)Do not burn.
3)Avoid tanning and UV tanning booths.
4)Cover up with clothing, including a broad-brimmed hat and UV-blocking sunglasses.
5)Use a sunscreen with an SPF of 15 or higher every day.
6)Apply 1 ounce (2 tablespoons) of sunscreen to your entire body 30 minutes before going outside. Reapply every two hours, or immediately after swimming or excessive sweating.
7)Keep newborns out of the sun. Sunscreens should be used on babies over the age of six months.
Difference between UVA and UVB rays(UVA vs UVB) :-
1. UVA has a longer wavelength than UVB .
2. UVA has more penetrating power and penetrates glass while UVB does not penetrate glass.
3. UVA radiation penetrates the skin up to the dermis layer while UVB only reaches the epidermis.
4. UV radiation are harmful, UVB poses a higher risk factor than UVA because it causes direct DNA damage.
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