top button
    Connect to us
      Facebook Login
      Site Registration Why to Join

    Most popular tags
    yoga meditation yoga for health healthcare diabetes benefits pregnancy yoga poses home remedies human body weight loss asanas food fertility surya namaskar mindfulness essay health ayurveda infertility

chinachemicalgroup.com

0 votes
14 views

With the rapid development of industry, a larger and larger range of Chemicals are invented and widely used in the production like Fluorine Chemicals.

 

Fluorine is an univalent poisonous gaseous halogen, it is pale yellow-green and it is the most chemically reactive and electronegative of all the elements. Fluorine readily forms compounds with most other elements, even with the noble gases krypton, xenon and radon. It is so reactive that glass, metals, and even water, as well as other substances, burn with a bright flame in a jet of fluorine gas.

In aqueous solution, fluorine commonly occurs as the fluoride ion F-. Fluorides are compounds that combine fluoride with some positively charged counterpart.

 

Atomic fluorine and molecular fluorine are used for plasma etching in semiconductor manufacturing, flat panel display production and MEMs fabrication. Fluorine is indirectly used in the production of low friction plastics such as teflon and in halons such as freon, in the production of uranium. Fluorochlorohydrocarbons are used extensively in air conditioning and in refrigeration. Fluorides are often added to toothpaste and, somewhat controversially, to municipal water supplies to prevent dental cavities. Fore more information visit our page on mineral water.

 

Small amounts of fluorine are naturally present in water, air, plants and animals. As a result humans are exposed to fluorine through food and drinking water and by breathing air. Fluorine can be found in any kind of food in relatively small quantities. Large quantities of fluorine can be found in tea and shellfish. Fluorine is essential for the maintenance of solidity of our bones. Fluorine can also protect us from dental decay, if it is applied through toothpaste twice a day. If fluorine is absorbed too frequently, it can cause teeth decay, osteoporosis and harm to kidneys, bones, nerves and muscles. Fluorine gas is released in the industries. This gas is very dangerous, as it can cause death at very high concentrations. At low concentrations it causes eye and nose irritations.

 

When fluorine from the air ends up in water it will settle into the sediment. When it ends up in soils, fluorine will become strongly attached to soil particles. In the environment fluorine cannot be destroyed; it can only change form. Fluorine that is located in soils may accumulate in plants. The amount of uptake by plants depends upon the type of plant and the type of soil and the amount and type of fluorine found in the soil. With plants that are sensitive for fluorine exposure even low concentrations of fluorine can cause leave damage and a decline in growth. Too much fluoride, wheater taken in form the soil by roots, or asdorbed from the atmosphere by the leaves, retards the growth of plants and reduces crop yields. Those more affected are corns and apricots.

 

Animals that eat fluorine-containing plants may accumulate large amounts of fluorine in their bodies. Fluorine primarily accumulates in bones. Consequently, animals that are exposed to high concentrations of fluorine suffer from dental decay and bone degradation. Too much fluorine can also cause the uptake of food from the paunch to decline and it can disturb the development of claws. Finally, it can cause low birth-weights.

 

Just like Fluorine Chemicals Lithium Chemicals are also commonly used. Lithium is the first of the alkalis in the periodic table. In nature it’s found like a mixture of the isotopes Li6 and Li7. It's the lightest solid metal, and is soft, silvery-white, with a low melting point and reactive. Many of its physical and chemical properties are more similar to those of the alkaline earth metals than to those of its own group. Between the most significant properties of lithium we find its high specific heat (calorific capacity), the huge temperature interval in the liquid state, high termic conductivity, low viscosity and very low density. Metallic lithium is soluble in short chain aliphatic amines, like etilamine. It's insoluble in hydrocarbons.

 

Lithium takes part in a huge number of reactions, with organic reactants as well as with inorganic reactants. It reacts with oxygen to form monoxide and peroxide. It’s the only alkaline metal that reacts with nitrogen at ambient temperature to produce a black nitrure. It reacts easily with hydrogen at almost 500oC (930oF) to form lithium hydride. Metallic lithium’s reaction with water is extremely vigorous. Lithium reacts directly with the carbon to produce the carbure. It binds easily with halogens and forms halogenures with light emission. Although it doesn’t react with parafinic hydrocarbons, it experiments addition reactions with alquenes substituted by arile and diene groups. It also reacts with acetylenic compounds, forming lithium acetylures, which are important in vitamin A synthesis.

 

The main lithium compound is the lithium hydroxide. It's a white powder; the manufactured material is monohydrate lithium hydroxide. The carbonate can be used in the pottery industry and in medicine as an antidepressant. The bromine and the lithium chloride both form concentrated brine, which have the property of absorbing the humidity in a wide interval of temperature; these brines are used in the manufactured air conditioning systems.

 

The main industrial use of lithium is in lithium stearatum form, as lubricant grease's thickener. Other important applications of lithium compounds are in pottery, specifically in porcelain glaze; as an additive to extend the life and performance of alkaline storage batteries and in autogenous welding and brass welding.

 

Except for the kinds metioned above, there are other chemicals especially for Electronic Grade Chemicals like Alumina Chemicals.

posted Mar 8 by Aop06sd

Looking for an answer?  Share this question: #
Facebook Share Button Twitter Share Button Google+ Share Button LinkedIn Share Button Multiple Social Share Button

Similar Questions
0 votes

passive multiplexer in most networks consists of a mux and demux optical component. The mux combines, or multiplexes, wavelengths onto a fiber. The demux on the other end of the connection splits, or de-multiplexes, the connections.

In DWDM system, DWDM mux demux is two indispensable modules. Mux (Multiplexer) is a module at the transmitter end that brings several data signals together for transporting over a single fiber, while Demux (Demultiplexer) is a module at the receiver end that separates the signals that come together and passes each channel to an optical receiver.

CWDM mux demux (Coarse Wavelength Division Multiplexer/Demultiplexer) is a flexible, low-cost solution that enables the expansion of existing fiber capacity. CWDM multiplexer is for combining signals together, while demultiplexer is for splitting signals apart.

A polarization-maintaining (PM) WDM filter is a small device used to multiplex PM signals while maintaining the output polarization. When you are using highly efficient systems, PM fibers and PM signals play a very critical role in ensuring the desired efficiency.

Fiber Patch Cord & Cable Assembly, often called fiber patch cable, fiber jumper, or fiber patch lead, is a length of fiber cable that terminated with fiber optic connectors (LC, SC, MTRJ, ST and etc.) at each end. The connectors allow fiber optic patch cord to be rapidly connected to an optical switch or other telecommunications/computer device.

Fiber loopback is widely used for various applications. In terms of telecommunication, loopback is a hardware or software method to feed a received signal or data back to the sender. It is very useful for solving physical connection problems.

Fiber terminators(Plug-in type or Build-out type) are used to terminate unused fiber connector ports in fiber optic systems so optical terminators unwanted reflections are not introduced back into the system. It is used in the fiber-optic networks to install on possibly unused ports.

Fiber optic isolator is a passive component used for fiber optic communications. As a magneto-optic device, the purpose of optical isolator is to allow light to be transmitted in only one direction. An optical isolator is a device that is designed to allow the optical signal travel in the forward direction while block reflections that would travel in the backward direction. Optical isolators are critically important in many applications in optical systems.

FBT splitter(fused biconical taper) is the traditional technology in which two fibers are placed closely together, typically twisted around each other and fused together by applying heat while the assembly is being elongated and tapered. A signal source controls the desired coupling ratio. The fused fibers are protected by a glass substrate and then protected by a stainless steel tube, typically 3 mm diameter by 54 mm long. FBT splitters are widely accepted and used in passive optical networks.

The PLC splitters are used to separate or combine optical signals. A PLC (planar lightwave circuit) is a micro-optical component based on planar lightwave circuit technology and provides a low-cost light distribution solution with small form factor and high reliability. PLCs are manufactured using silica glass waveguide circuits that are aligned with a v-groove fiber array chip that uses ribbon fiber. Once everything is aligned and bonded, it is then packaged inside a miniature housing. PLC splitters have high quality performance, such as low insertion loss, low PDL, high return loss, etc.

0 votes

Green tea is made from the Camellia sinensis plant. Its dried leaves and leaf buds are used to make several teas, including black and oolong teas. Green tea is prepared by steaming and pan-frying the Camellia sinensis leaves and then drying them. Green tea is not fermented, so it's able to maintain necessary molecules called polyphenols, which seem to be responsible for many of its benefits. It also contains caffeine. Drinking green tea is linked to a reduced risk of clogged arteries. Drinking green tea might reduce the risk of developing high blood pressure. It might also slightly lower blood pressure in people with high blood pressure.

One of the most classical Chinese green teas, Chunmee tea is a tea every tea lover has to try at least once. It offers a good perspective on a wide range of green tea flavors, may offer numerous benefits, and tastes great, both hot and cold. It’s produced only in China, mostly in Anhui and Jiangxi Province. The English name of this tea is "Precious Eyebrows tea" because of the small hand-rolled leaves shaped in the form that resembles eyebrows. Chunmee is produced in China and is one of the most popular green teas in western countries. Chunmee is a pan-fired tea. Pan-fired teas have a less vegetal and nuttier flavor, that can be light or more intense, depending on how the teas were made.

Gunpowder tea is loose-leaf tea that is tightly rolled into tiny pellets that resemble gunpowder. This type of tea is usually produced using green tea leaves, but not always. The benefits of gunpowder tea depend on the type of tea leaf that is used to produce it. Gunpowder tea has a unique production method. To make the highest quality gunpowder tea, artisans wither, steam, roll, and dry individual tea leaves. This tea is sometimes called pearl tea or bead tea based on the shape of each tiny tea pellet. Some people also call it Chinese gunpowder tea.

tea bag (or "teabag") is generally agreed to be a small, porous bag used to steep tea. These bags may be sealed and filled with tea leaves, or they may be open and empty (thus allowing the tea brewer/drinker to fill it with whole-leaf tea). Many tea bags have a string attached to make removing them from the brewing vessel easier, however, this is not true for all tea bags. Generally, tea bags with a string attached also bear the name of their producer or the type of tea on a small piece of paper at the opposite end of the string from the tea bag itself.

The famous tea in the 21st century includes Xi Hu Long Jing, Jiangsu Bi Luo Chun, Huang Shan Mao Feng, Liu An Gua Pian, Fujian Bai Hao Yin Zhen, Qimen Hong Cha, Du Yu Mao Jian, Xin Yang Mao Jian, Wuyi Yan Cha, Fujian Tie Guan Yin. Most of them have a singular shape, flavor, and aroma, easily discerned from other styles, and are developed from a particular local variety of tea bush that has acquired strong and widespread appeal.

Flower tea is a mixture of tea and tisanes. In ancient times, people used tea as a herbal medicine long before drinking it for pleasure. They added flowers to boost the medicinal value and sensory delights of the tea. Some blossoms commonly used in flowering tea are jasmine, calendula, globe amaranth, marigold, and lily.

0 votes

bathtub, also known simply as a bath or tub, is a container for holding water in which a person or animal may bathe. Most modern bathtubs are made of thermoformed acrylic, porcelain-enameled steel, fiberglass-reinforced polyester, or porcelain-enameled cast iron. A bathtub is usually placed in a bathroom either as a stand-alone fixture or in conjunction with a shower. Modern bathtubs have overflow and waste drains and may have taps mounted on them. They are usually built-in but may be free-standing or sometimes sunken. Until recently, most bathtubs were roughly rectangular in shape, but with the advent of acrylic thermoformed baths, more shapes are becoming available. Bathtubs are commonly white in color, although many other colors can be found.

drop-in bathtub is a bathtub that has been finished on all sides with a lip or rim, allowing it to be fastened or secured to a finished alcove or structure commonly referred to as a surround. This design allows you to simply ‘drop in’ your bathtub, obscuring the outside of the bathtub completely by the surround so only the interior of the bathtub is visible. The surround can be constructed from anything ranging from natural stone to wood and can be raised high or constructed at feet level. This install method is what separates this bathtub design from a freestanding bathtub which can be placed and installed anywhere there is room in your bathroom.

Freestanding bathtubs sit on the floor of your bathroom. They don't attach to a tub surround or deck structure. You can place a freestanding tub anywhere you like in the room. They are available in a wide array of shapes including oval, rectangular and circular, as well as in a wide array of bathtub materials, including wood, cast iron, acrylic, and copper. On average, freestanding tubs cost less to install than built-in tubs.

Massage bathtubs integrate massage with bath. The massage bathtub bottom and four walls all have a small hole, that is used for the jet water. Through the four walls of high-pressure water to stimulate the human body acupoints to relax, the bottom of the nozzle can play the role of massage back, the combination of the two can more perfect relieve pressure.

An acrylic bathtub is a bathtub formed by vacuum sheets of acrylic, which is then reinforced with fiberglass. The surface of an acrylic bathtub is relatively soft and not very rigid. Acrylic tubs can be reinforced with fiberglass, which will increase durability and rigidity. The acrylic bathtubs offer good heat retention, keeping bath water warm for longer than many other materials. And also, they are easy to maintain and repair.

plastic bathtub is made of a heated polymer composition and then dried into plastic sheets. Glass sheets reinforce the plastic that compresses together for increased strength. A giant suction machine molds the plastic into the shape of a bathtub. Plastic bathtubs actually consist of either molded fiberglass or acrylic, which are similar in appearance. Known for their nonporous surface, durable finish and longevity, plastic bathtubs are prevalent in home bathrooms.

Shower trays are two-toned and have a key function: to hold a basin under the tap (or shower) and to provide storage space underneath. Shower trays can be custom-made to suit a certain room and purpose. Shower trays are made from a variety of materials such as stone resin or acrylic. Acrylic shower trays are lightweight and are usually around 4.5mm thick and reinforced with wood. An acrylic shower tray allows for greater flexibility, but with more flexibility comes a higher chance of breakage.

As the world's first and largest manufacturer of whirlpool products, Jacuzzi is committed to state-of-the-art design, safety and technology. While the company is best known for its innovative whirlpool baths, the Jacuzzi company also designs and manufactures a wide range of non-jetted baths, shower systems, shower bases, faucetry, portable spas, above-ground swimming pools, swimming pool equipment and pumps, as well as agricultural, sump and sewage pumps.

0 votes

Digital communication cables can be used to connect indoor electronic equipment such as computers and TVs to prevent the interference of strong electromagnetic signals from the outside world and avoid the distortion of effective signals.

CAT7 Cable, more commonly known as a Cat7 or Cat-7 cable, is a type of high-end data transfer patch cable used in delivering the core infrastructure of wired Gigabit Ethernet setups.

CAT6 Cable  is a standardized twisted pair cable for Ethernet and other network physical layers that is backward compatible with the Category 5/5e and Category 3 cable standards.

CAT6A Cable is made and terminated to tighter tolerances than Cat6. This means the copper conductors are twisted tighter. This requires higher specification patch panels, wall jacks, and RJ45 connectors.

One of the interesting things about CAT5 Cable and CAT5E Cable is that they are virtually identical in their physical appearance. You cannot tell them apart based on thickness, color, or the material used. The only way to identify them is to look at the text that is printed on the cable and see for yourself. With that being said, some manufacturers have gone out of their way to improve the durability of the PVC protective jacket on the Cat5e cables. This makes them better suited for frequent use over a period of several years, if not decades. An alternative and unneeded way to tell the two apart would be to cut open the cables and inspect the wiring inside. In general, the wires in Cat5e cables are twisted far more tightly than those in the Cat5 cable. This is what allows Cat5e cables to be more resistant to crosstalk.

Hybrid cable may contain a combination of optical fibers, twisted pair/quad, coaxial and current-carrying electrical conductor elements as required, under a common outer sheath. A Telco Hybrid cable can contain more than one fiber type in the same cable as well as copper elements (typically twisted pairs).

patch cable, patch cord or patch lead is an electrical or optical cable used to connect ("patch in") one electronic or optical device to another for signal routing. Devices of different types (e.g., a switch connected to a computer, or a switch to a router) are connected with patch cords.

0 votes

label (as distinct from signage) is a piece of paper, plastic film, cloth, metal, or other material affixed to a container or product, on which is written or printed information or symbols about the product or item. Information printed directly on a container or article can also be considered labelling.

Stainless Steel Labels are great for harsh environments when you need identification for equipment that needs to withstand the elements.

Aluminum Labels are sturdier than traditional labels and can withstand heat, moisture, and extreme cold. They're perfect for products, parts, or packaging designed to contact direct heat or extreme cold.

Zinc alloy label and custom clothing tags are vital to the fashion apparel industry. Brands rely on these zinc alloy label to indicate information like an item's product number, price, care instructions, and size.

The Professional copper labels are very much stronger, and 3 times heavier than the Professional Aluminium tags. The Professional copper plant labels can be punched with our Characters Punches using the Jig to position the characters. The copper labels will at first darken then gradually weather to a muted and attractive verdigris colour over time.

Brass Labels are also a popular choice for businesses that want to identify their property with a name or logo. Brass is a durable material that can withstand the wear and tear of everyday use. In addition, brass labels can be customized to include any text or design you choose.

Iron Labels are labels that require no sewing. They have a backing that allows them to simply be ironed onto an item instead of having to sew it on. A heat-activated adhesive is attached to each label.

Metal labels are generally stronger than those made of plastic materials and have excellent resistance to most harsh conditions such as extreme temperatures, UV, and saltwater exposure.

sticker is a type of label: a piece of printed paper, plastic, vinyl, or other material with pressure sensitive adhesive on one side. They can be used for decoration or for functional purposes, depending on the situation.

Paper stickers like the name suggest are made of thin sheets of paper. Some of the crystal features of these stickers include the following. Made of very thin low profile materials. They add exceptional excellent finish quality especially to packaged boxes and products. They can use gloss or matte paper finish.

We don't provide medical advice, diagnosis or treatment. See additional information.
...