.
ANSWER1 `Sweat' denotes the moisture exuded through the
pores of the skin of human beings and other mammals.
The temperature of the human body is maintained at about 37
degrees centigrade. This, irrespective of the temperature of the surroundings is
continually generated by the chemical actions (metabolism) which occur in the
body. This must be dissipated as fast as it is produced if the temperature is to
remain constant. Also, water is a by-product of the chemical actions. This water
is, invariably, the source for sweat.
The excess heat passes from the body by convection, by
radiation and by evaporation. Convection takes place when a current of air
cooler than the body receives heat by contact with it and then passes off
carrying heat with it.
Heat is dissipated by radiation when the surroundings are at a
lower temperature than the body. Evaporation occurs when the skin is moist and
the air is sufficiently dry so that it can readily absorb moisture.
If the air temperature is equal to or above that of the body,
no heat can be carried away by convection. If the surroundings, say, the walls
of the rooms and the objects in it, are as warm or warmer than the body, no heat
can be dissipated by radiation.
The moisture on the skin is in the form of water and that in
the air in the form of vapour. In passing from the body to the air, this
moisture must absorb the latent heat of vaporisation and, thereby, extract large
quantities of heat. But, if the air is already saturated, it cannot absorb any
more moisture and, consequently, no heat can be dissipated by evaporation.
Obviously, the sweat that has been exuded cannot escape and
hence gets accumulated on the skin surface. This is `profuse sweating.'
Now, consider the atmospheric conditions in the coastal areas,
particularly, in the tropics and, more so, during the summer. The air
temperature invariably exceeds 37 degrees Centigrade and the air is almost
saturated (highly humid).
More so, if the wind direction is from the sea towards the
land. Hence, virtually, no heat can be dissipated by convection, by radiation or
by evaporation. Consequently, people living in such coastal areas sweat
profusely.
ANSWER 2: Normally the `relative humidity', in
coastal areas will be higher than inland areas. Relative Humidity (RH) is
defined as the ratio of the mass of water vapour in a certain volume of moist
air at a given temperature to the mass of water vapour in the same volume of
saturated air at the same temperature.
The rate of evaporation of moisture depends on the temperature
of air and relative humidity. Relative humidity is considered to be a more
commonly understood measure of the degree of saturation of air.
Actually the sweat comes out of our body irrespective of the
RH, whereas when the RH level is higher we felt it. When the RH is lower, we
don't feel the sweat because it gets evaporated quickly, since the evaporation
rate is higher when RH is low.
That's why inside an air-conditioned room we don't feel the
sweating. The moisture in the air gets condensed over an air-conditioner's low
temperature evaporator coil and the RH inside the room drop
Sweat Busters – Natural Home Remedies for Hyperhidrosis:
Also known as hyperhidrosis,
excessive sweating can be recognized when we sweat for no apparent reason.
Sweaty palms, clammy feet and excessive sweating under the armpits and groin
region are signs of abnormal sweating. There are ways of
fighting the emotional problems connected with excessive perspiration. There are
a number of herbs and home remedies for excessive
sweating which can be quite effective in reducing your
sweat levels. Some of them are:
Tomato Juice: A glass of tomato juice taken daily for a week generally takes care of this problem.
- Apple Cider Vinegar: An excellent way to control excessive perspiration, apple cider vinegar can be used externally as well as internally. Apply some of this under your armpits to help eliminate body odor, or if taken internally add two teaspoons of honey to two teaspoons of vinegar and have it daily for one week on an empty stomach. For sweaty feet, apply this vinegar evenly after washing and drying your feet.
- Corn starch: Can be used as a substitute of deodorants, which often lead to allergies and discoloration of skin. Apply generously under arms and dust of excess powder.
- Potato: Try slicing a potato and rubbing it in the sweaty areas.
- Green Tea: People
vouch for the effect of having a cup of green
tea every day to get rid of excessive sweat and even
call it a ‘miracle cure’ .
Green Tea (Image source: sxc.hu)
- Tea tree oil: Has astringent like properties, and is also an anti fungal agent and can be applied as a thin layer under armpits, hands and feet and the groin area.
- Sage: An effective antiperspirant, this kitchen herb can be used by mixing the dried leaves into your diet like egg curries, soups and pasta. You can even boil 1 teaspoon of dried sage leaves and leave aside for 24 hours at room temperature. Clean and dry thoroughly, those areas like armpits, hands feet and soles and apply this mixture at least three times a day.
- Burdock: A bitter tasting herb, it is preferable to take this in tincture form, one teaspoon three times a day. This diverts extra sweat to the lymph nodes, kidneys and bowels, thus reducing the excess sweat from pouring out through the body.
- Wheat Grass Juice: the water extract from wheat grass is an effective home remedy for reducing excessive sweating. One glass a day helps to neutralize acids and dilute toxins and is also a good source of protein, vitamin C and Vitamin B-12.
- Tea Bags: Yes, teabags soaked in hot water acts as an effective antiperspirant as tea contains Tannic acid which has astringent properties. Soak hands and feet in warm water containing at least five teabags for half an hour and notice the difference!
s.
No comments:
Post a Comment