The health-care industry incorporates several sectors that are dedicated to providing health care services and products.
Drinking water or potable water is water of sufficiently high quality that can be consumed or used with low risk of immediate or long term harm. In most developed countries,
the water supplied to households, commerce and industry is all of drinking water standard, even though only a very small proportion is actually consumed or used in food preparation.
Over large parts of the world, humans have inadequate access to potable water and use sources contaminated with disease vectors, pathogens or unacceptable levels of toxins or
suspended solids. Such water is not potable, and drinking or using such water in food preparation leads to widespread acute and chronic illnesses and is a major cause of death
and misery in many countries. Reduction of waterborne diseases is a major public health goal in developing countries.Typical water supply networks deliver potable water from the tap, whether it is to be used for drinking, washing or landscape irrigation. One counterexample is urban China, where drinking water can optionally be delivered by a separate tap, often in the form of distilled water or otherwise the regular tap water needs to be boiled.
Water is a chemical substance with the chemical formula H2O. Its molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth
with its solid state, ice, and gaseous state, water vapor or steam.Water covers 70.9% of the Earth's surface,and is vital for all known forms of life.
Medical research can be divided into two general categories: the evaluation of new treatments for both safety and efficacy in what are termed clinical trials, and all other research that contributes to the development of new treatments.
The politics of health care depend largely on which country one is in
Health care systems are composed of individuals and organizations that aim to meet the health care needs of target populations. There are a wide variety of health care systems around the world
this is Home water purification system (water filter)effectively reduces chlorine, chloramines, trihalomethanes, pesticides, heavy metals, and foreign tastes and odors below detectable levels for safer, healthier water. At the same time this Water filter enhances the water with delicate ions and minerals. By increasing the solubility of water, the water purifier also provides a conditioning effect without salt or resins, reducing unsightly spotting and scaling associated with moderately hard water.
Water can dissolve many different substances, giving it varying tastes and odors. Humans and other animals have developed senses which enable them to evaluate the potability of water by avoiding water that is too salty or putrid.
The taste of spring water and mineral water, often advertised in marketing of consumer products, derives from the minerals dissolved in it. However, pure H2O is tasteless and odorless.
The advertised purity of spring and mineral water refers to absence of toxins, pollutants and microbes.
What do we do or can do? In a nutshell, we do a lot and through our website make people know, as the first and foremost obligation, how the specter of contaminated water is getting strengthened increasingly. But being an experienced water filter manufacturer and leading water filter supplier it is also our responsibility to make people aware of the essentiality of water filter.
Yes, water filters are available in a lot of sizes, models, shapes and prices and being a first rate water filter manufacturer, You will come across, once you look at our brand, a number of filters go together with all material came from the nature and its easy to used and produce in orang asli. However the good filters always come with sub micron filtration and ion exchange, in conjunction with carbon filtration.but this one its just the example and its the way to start people figure is out how we can be creative in this material .
Drinking water or potable water is water of sufficiently high quality that can be consumed or used with low risk of immediate or long term harm. In most developed countries,
the water supplied to households, commerce and industry is all of drinking water standard, even though only a very small proportion is actually consumed or used in food preparation.
Over large parts of the world, humans have inadequate access to potable water and use sources contaminated with disease vectors, pathogens or unacceptable levels of toxins or
suspended solids. Such water is not potable, and drinking or using such water in food preparation leads to widespread acute and chronic illnesses and is a major cause of death
and misery in many countries. Reduction of waterborne diseases is a major public health goal in developing countries.
Typical water supply networks deliver potable water from the tap, whether it is to be used for drinking, washing or landscape irrigation.
One counterexample is urban China, where drinking water can optionally be delivered by a separate tap, often in the form of distilled water or otherwise the regular tap water needs to be boiled.
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Water quality is the physical, chemical and biological characteristics of water. It is a measure of the condition of water relative to the requirements of one or more biotic species and or to any human need or purpose.
It is most frequently used by reference to a set of standards against which compliance can be assessed. The most common standards used to assess water quality relate to drinking water, safety of human contact
and for the health of ecosystems.
In the setting of standards, agencies make political and technical/scientific decisions about how the water will be used.
In the case of natural water bodies, they also make some reasonable estimate of pristine conditions. Different uses raise different concerns
and therefore different standards are considered. Natural water bodies will vary in response to environmental conditions. Environmental scientists
work to understand how these systems function which in turn helps to identify the sources and fates of contaminants. Environmental lawyers and policy
makers work to define legislation that ensure that water is maintained at an appropriate quality for its identified use.
The vast majority of surface water on the planet is neither potable nor toxic. This remains true even if sea water in the oceans (which is too salty to drink) is not counted.
Another general perception of water quality is that of a simple property that tells whether water is polluted or not. In fact, water quality is a very complex subject, in part because water
is a complex medium intrinsically tied to the ecology of the Earth. Industrial pollution is a major cause of water pollution, as well as runoff from agricultural areas, urban stormwater
runoff and discharge of treated and untreated sewage . Drinking water, including bottled water, may reasonably be expected to contain
at least small amounts of some contaminants. The presence of these contaminants does not necessarily indicate that the water poses a health risk.
Environmental water quality, also called ambient water quality, relates to water bodies such as lakes, rivers, and oceans. Water quality standards vary significantly due to different environmental conditions,
ecosystems, and intended human uses. Toxic substances and high populations of certain microorganisms can present a health hazard for non-drinking purposes such as irrigation, swimming, fishing,
rafting, boating, and industrial uses. These conditions may also affect wildlife which use the water for drinking or as a habitat. Modern water quality laws general specify protection of fisheries and
recreational use and require as a minimum,retention of current quality standards.There is some desire among the public to return water bodies to pristine, or pre-industrial conditions.
Most current environmental laws focus of the designation of uses. In some countries these allow for some water contamination as long as the particular type of contamination is not harmful to the designated uses.
Given the landscape changes in the watersheds of many freshwater bodies, returning to pristine conditions would be a significant challenge. In these cases, environmental scientists focus on achieving goals for
maintaining healthy eco-systems and may concentrate of the protection of populations of endangered species and protecting human health.
---The presence of color in water does not necessarily indicate that the water is not potable. Color-causing substances such as tannins may be harmless.
Color is not removed by typical water filters; however, slow sand filters can remove color, and the use of coagulants may also succeed in trapping the color-causing compounds within the resulting precipitate.
Other factors can affect the color we see:
Particles and solutes can absorb light, as in tea or coffee. Green algae in rivers and streams often lend a blue-green color.
The red sea has occasional blooms of red Trichodesmium erythraeum algae. Particles in water can scatter light.
The Colorado river is often muddy red because of suspended reddish silt in the water. Some mountain lakes and streams with finely ground rock, such as glacial flour, are turquoise.
Light scattering by suspended matter is required in order that the blue light produced by water's absorption can return to the surface and be observed. Such scattering can also shift the
spectrum of the emerging photons toward the green, a color often seen when water laden with suspended particles is observed
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Clean water appears blue in white-tiled swimming pools as well as in indoor pools where there is no blue sky to be reflected. The deeper the pool, the bluer the water.
Nevertheless, the water in a swimming pool also appears blue even when the optical path length through the water to the white sides is mere millimeters.
Though little water is between the white surface and the observer, evidently reflection at the air-water interface shifts the source of illumination to light that has traversed a large distance through water,
as demonstrated with a floating white bucket with water in it.
Scattering from suspended particles also plays an important role in the color of lakes and oceans. A few tens of meters of water will absorb all light, so without scattering,
all bodies of water would appear black. Because most lakes and oceans contain suspended living matter and mineral particles, known as colored dissolved organic matter
light from above is reflected upwards. Scattering from suspended particles would normally give a white color, as with snow, but because the light first passes through many
meters of blue-colored liquid, the scattered light appears blue. In extremely pure water—as is found in mountain lakes, where scattering from white-colored particles is missing
the scattering from water molecules themselves also contributes a blue color.The hue of the reflected sky also contributes to the perceived color of water.
Another phenomenon that occurs is Rayleigh scattering in the atmosphere along one's line of sight: the horizon is typically 4–5 km distant and the air
(being just above sea level in the case of the ocean) is at its densest. This mechanism would add a blue tinge to any distant object (not just the sea) because blue light would be scattered into one's line of sight.
The surfaces of seas and lakes often reflect blue skylight, making them appear bluer. The relative contribution of reflected skylight and the light scattered back from the depths is strongly dependent on observation angle.
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The color of water is a subject of both scientific study and popular misconception. While relatively small quantities of water are observed by humans to be colorless,
pure water has a slight blue color that becomes a deeper blue as the thickness of the observed sample increases. The blue tint of water is an intrinsic property and is caused by
selective absorption and scattering of white light. Impurities dissolved or suspended in water may give water different colored appearances.
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A water filter removes impurities from water by means of a fine physical barrier, a chemical process or a biological process. Filters cleanse water to various extents for irrigation, drinking water, aquariums, and swimming pools.
Types of water filters include media filters, screen filters, disk filters, slow sand filter beds, rapid sand filters and cloth filters
Point-of-use filters for home use include granular-activated carbon filters (GAC) used for carbon filtering, metallic alloy filters, microporous ceramic filters, carbon block resin (CBR)
and ultrafiltration membranes. Some filters use more than one filtration method. An example of this is a multi-barrier system. Jug filters can be used for small quantities of drinking water.
Some kettles have built-in filters, primarily to reduce limescale buildup.Water filters are used by hikers, by aid organizations during humanitarian emergencies, and by the military.
These filters are usually small, portable and light and usually filter water by working a mechanical hand pump, although some use a siphon drip system
to force water through while others are built into water bottles. Dirty water is pumped via a screen-filtered flexible silicon tube through a specialized filter, ending up in a container.
These filters work to remove bacteria, protozoa and microbial cysts that can cause disease. Filters may have fine meshes that must be replaced or cleaned, and ceramic
water filters must have their outside abraded when they have become clogged with impurities.
These water filters should not be confused with devices or tablets that are water purifiers, some of which remove or kill viruses such as hepatitis A and rotavirus.
The term water polishing can refer to any process that removes small (usually microscopic) unwanted material from a portion of water. The process and its meaning
vary from setting to setting: a manufacturer of aquarium filters may claim that its filters perform water polishing by capturing "micro particles" within nylon or polyester.
pads[2] just as a chemical engineer can use the term to refer to the removal of magnetic resins from a solution by passing the solution over a bed of magnetic particulate
In this sense, water polishing is simply another term for water filtration.
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water pump
pump is a device used to move fluids, such as liquids, gases or slurries
A pump displaces a volume by physical or mechanical action. Pumps fall into five major groups: direct lift, displacement, velocity, buoyancy and gravity pumps.Their names describe the method for moving a fluid.
Gear pump and Roots-type pumps and Peristaltic pump and Reciprocating type pumps
Reciprocating pumps are those which cause the fluid to move using one or more oscillating pistons, plungers or membranes (diaphragms).
Reciprocating-type pumps require a system of suction and discharge valves to ensure that the fluid moves in a positive direction.
The pumps can be powered by air, steam or through a belt drive from an engine or motor. This type of pump was used extensively
in the early days of steam propulsion (19th century) as boiler feed water pumps. Reciprocating pumps are now typically used for pumping
highly viscous fluids including concrete and heavy oils, and special applications demanding low flow rates against high resistance.
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