The Nitrogen Family Elements at a Glance

Author: Debra Tan
Source: articleage.com

A glossy golden brown tan to set off toned limbs – that’s the stuff which the young fashion-conscious dreams are made of. The pursuit of that bronzed, sun-kissed look has led to an influx of sun worshippers in bikinis, board shorts, and bare chests congregating at the beaches. But just how much do they know about the dangers associated with excessive sun exposure?
A lot of youths are adventurous, fun loving and are passionate about sports. This may just cause them to overlook the necessity of proper sun protection. While many outdoor sports like soccer, wakeboarding, windsurfing etc are undoubtedly beneficial to health, the risks of excessive sun exposure to the participants are also very real.
Sun Damage
The sun emits 3 types of ultraviolet (UV) rays: UVA, UVB and UVC. Only UVA and UVB rays reach the earth’s surface because UVC is filtered out by the ozone layer.
UVA penetrates deeply into the skin and triggers the production of melanin, which is a pigment in our body that causes skin to tan. UVB primarily affects the skin’s outer layer and causes sunburn. UV rays are thought to be responsible for chronic photo-aging (cluster of skin conditions like hyper pigmentation, wrinkles and sagging skin), and skin cancer.
Sunburn is one of the short-term damages of sun exposure. It ranges from redness and pain to redness and swelling, and in some serious cases, blisters can occur.
Frequent sunburns have been associated with increased risks of getting skin cancers. There are 3 common types of skin cancers: squamous cell carcinoma (SCC), basal cell carcinoma (BCC) and malignant melanoma.
Most SCC and BCC cases are caused by chronic exposure to sunlight. These tumors appear most commonly on sun-exposed areas like the face, hands, back, shoulders and lower lip. SCC tumors are irregular and fleshy growths that can enlarge and break down into ulcers.
BCC tumors are often shiny and pigmented, with raised borders. The Skin Cancer Foundation (SCF) in New York, USA, estimates that some 800,000 and 200,000 Americans suffer from BCC and SCC annually respectively.
Malignant melanoma is cancer of the skin’s pigment cells. It may form in pre-existing moles, where pigmentation is heavily concentrated. The tumors are presented as large, thick and colored (red, blue or black) patches that grow rapidly, with irregular outlines. The SCF estimates that about 51,000 new cases of malignant melanoma are reported annually in the USA.
On a less fatal note, exposure to bright light can also trigger migraines and headaches, for up to 24 hours. Melasma is another UV-related skin disorder characterized by symmetrical brown pigmentation patches in UV-exposed areas and affects women 90% of the time.
Block Out the Sun
Much as knowledge of sun exposure dangers is important, knowing how to minimize risks is even more essential. Techniques to minimize damage from sun rays can be divided into those to do with behavior and those to do with fabrics.
Behavior wise, sun-lovers can refrain from carrying out high-risk activities between 10am and 4pm, when the sun’s rays are the strongest. On a general note, try to keep in the shade while going about normal activities.
Fabrics that are sun-protective have tight weaves and are dark-colored. To test for a tight weave, hold the garment about 7 inches from your eyes towards a light source. If visible light can penetrate holes between the threads, so can UV rays. Dark colors absorb harmful UV rays better than light-colored clothes and hence protect the skin better.
To protect the face, sunscreen is essential, preferably one with at least Sun Protection Factor (SPF) 20. Reliable brands include Sunkiller, La Roche-Posay and Coppertone. If sun exposure time is expected to be long, then a sunscreen of higher SPF of 45 or 60 is recommended. One often-neglected directive is to reapply sunscreen frequently throughout the day, as sweat or friction may have washed it away. For the eyes, sunglasses with UV-protective coating are advised.
Alternative Tones
Fashion-conscious youths who covet a tan but are afraid of increasing their skin cancer risks have started to frequent tanning salons. This misguided attempt only reduces the incidence of sunburn and not skin cancer, warns Dr Wong, an associate consultant dermatologist with the National Skin Centre of Singapore.
“In fact, by going to tanning salons, you are exposed to unnecessary excessive UVA, which may increase your risk of getting skin cancer as it is primarily UVA-mediated.”
One relatively harmless alternative to sun tanning is to use self-tanning lotions. These contain dihydroxyacetone (DHA), which reacts with proteins in dead skin cells on the skin surface to result in brown pigmentation, which becomes the tan. While self-tanning lotions, like other topical products, have been known to cause skin irritation, no adverse long-term effects have been recorded.
As we welcome the warm, sunny weather, do keep in mind the relevant risks and precautions. Being cautious when young may just save you lots of heartache and pain in later years.
Debra Tan is a senior product development consultant at ~SkinWhite Research Labs. Equipped with a team of experienced cosmeceutical researchers, SkinWhite Research Labs is a company that specializes in the formulation of skin whitening products that help to rectify sunburn and pigmentation problems. Please visit their official website for more information on sunscreen and how to protect your skin from sunburn.

Author: Heather Colman
Source: isnare.com

Melanoma is a malignant tumor predominantly found in the skin but can be found elsewhere, especially the eye. The vast majority of melanomas originate in the skin.

Melanomas are the most lethal form of skin cancer. As with most forms of cancer, earlier detection gives patients a better chance of survival.

Epidemiologic studies from Australia suggest that exposure to ultraviolet radiation is one of the major contributors to the development of melanoma. Occasional extreme sun exposure resulting in a sunburn is causally related to melanoma. Those with more chronic long term exposure (outdoor workers) may develop protective mechanisms.

Melanoma is most common on the back in men and on legs in women (areas of intermittent sun exposure) and is more common in indoor workers than outdoor workers (in a British study). Other factors are mutations in or total loss of tumor suppressor genes. Use of sunbeds with deeply penetrating UVA rays has been linked to the development of skin cancers, including melanoma.

Possible significant elements in determining risk include the intensity and duration of sun exposure, the age at which sun exposure occurs, and the degree of skin pigmentation. Exposure during childhood is a more important risk factor than exposure in adulthood. This is seen in migration studies in Australia where people tend to retain the risk profile of their country of birth if they migrate to Australia as an adult. Individuals with blistering or peeling sunburns especially in the first twenty years of life have a significantly greater risk for melanoma.

Fair and red-headed people are at greater risk for developing melanoma. A person with multiple atypical nevi or dysplastic nevi are at a significant risk. Persons born with giant congenital naevi are at increased risk.

A family history of melanoma greatly increases a person’s risk. Certain ‘melanoma families’ display features of mendelian inheritance of cancer causing genes. It is critical that individuals with family members who have been diagnosed with melanoma be checked regularly for skin cancer. Patients with a history of one melanoma are at increased risk of developing a second primary tumour.

Do you suspect that you may have Melanoma?

Any mole that is irregular in color or shape should be examined by a doctor to determine if it is a malignant melanoma, the most serious and life-threatening form of skin cancer. Following a visual examination and a dermatoscopic exam (an instrument that illuminates a mole, revealing its underlying pigment and vascular network structure), the doctor may biopsy the suspicious mole. If it is malignant, the mole and an area around it needs excision by a surgeon or dermatologist.

The diagnosis of melanoma requires experience, as early stages may look identical to harmless moles or not have any color at all. Where any doubt exists, the patient will be referred to a specialist dermatologist.

How to Prevent Melanoma

Minimize exposure to sources of ultraviolet radiation (the sun and sunbeds).

Wearing long-sleeved shirts, long trousers, and broad-brimmed hats offers the best protection.

Use a sunscreen with an SPF rating of 30 or better on exposed areas.

Disclaimer – The information presented here should not be interpreted as medical advice. If you suspect you have Melanoma, please consult your physician as early as possible for diagnosis and treatment options.