http://www.runyvmat.com/As the industry leader in phosphine ligands and catalysts for homogeneous catalysis, Solvay offers a range of phosphorus compounds used in a breadth of applications and markets. Our scalable phosphorus chemistry meets the unique requirements of reactions that are crucial to several manufacturing processes across markets and applications, including petrochemicals, life sciences, flavors and fragrances, agrochemicals, fine chemicals, and plastics and other polymers. And do you what is Phosphine Ligands? Phosphines are a three-valent phosphorus compound and act as a "soft" σ-donating ligand with an unshared electron pair. This gives solubilization and stabilization to organometallic complexes by forming complexes with various transition metal species including latter-period transition metals and others, and is also used for controlling the reactivity and selectivity of the transition metal promoted reactions. Electron density and bulkiness of phosphine ligands are greatly related to the reactivity of their forming metal complexes. Generally, the phosphine ligands with high electron density increase the reactivity of oxidative addition from a metal center, and their bulkiness improves the reductive elimination. For example, trialkylphosphines especially tert-butyl or cyclohexyl group substituted phosphines show the highest electron density while the electron density of triarylphosphines and phosphite are sequentially decreasing. On the other hand, as an index of the bulkiness of phosphine ligands, that of monodentate phosphine ligands shows the cone angle (θ) while bidentate phosphine ligands show the bite angle (ω). As the angle of the phosphine ligands is wider, their steric effect is greater and they are regarded as more bulky phosphine ligands. A monodentate phosphine ligand of tri(o-tolyl)phosphine, and bidentate phosphine ligands of 1,1'-bis(diphenylphosphino)ferrocene and Xantphos are known as representative bulky phosphine ligands. There are many different kinds of Phosphine Ligands, such as Chiral Phosphine Ligands, Chelated Phosphine Ligands, Biaryl Phosphine Ligand, Trisubstituted Phosphine Ligands and Other Phosphine Ligands. Homogeneous catalysis is an efficient alternative to its heterogeneous counterpart, and enables access to certain molecules that are not accessible through heterogeneous catalysis. Our high-performance phosphine ligands provide endless customization opportunities for catalytic processes. Phosphorus chemistry offers substantial diversity of structure, tunability and thermal stability, which leads to its use in many essential industries and an abundance of applications. A majority of Solvay's phosphorus technologies are available in liquid or solution form, which facilitates ease of handling and safe product stewardship. Solids are available if preferred. Produced via industry-recognized manufacturing processes, our phosphine ligands and catalysts can be manufactured at any scale. Solvay offers expertise and manufacturing wherewithal at any phase of the value chain, but specializes in developing ligand solutions from the initial R&D stage all the way to industrial-scale production and distribution. Except for Phosphine Ligands, there are also many other material Intermediate and Function Materials like Catalyst including Homogeneous Catalyst and Olefin Copolymerization Catalyst. posted an update 1년, 7개월전
http://www.liangmeico.com/What Are The Health Benefits of Tea?
People all over the world have been drinking tea for thousands of centuries, and for good reason. Numerous studies have shown that a variety of teas may boost your immune system, fight off inflammation, and even ward off cancer and heart disease. If you consider it troublesome to use Loose Leaf Tea, Bagged Tea is also a good choice.
While some brews provide more health advantages than others, there’s plenty of evidence that regularly drinking tea can have a lasting impact on your wellness. Put the kettle on, because we’re sharing some of the biggest benefits hidden in the world’s most popular teas.
White Tea Benefits
Known to have a delicate flavor, white tea comes from the Camellia sinensis plant that’s native to China and India. It is also the least processed tea variety. Research shows it may be the most effective tea in fighting various forms of cancer thanks to its high level of antioxidants. White tea may also be good for your teeth since it contains a high source of fluoride, catechins and tannins that can strengthen teeth, fight plaque, and make it more resistant to acid and sugar.
This variety also offers the least amount of caffeine, making it a smart choice for tea drinkers who want to avoid or limit their caffeine consumption.
Herbal Tea Benefits
Herbal teas, sometimes called tisanes, are very similar to white teas, but they contain a blend of herbs, spices, fruits or other plants in addition to tea leaves. Herbal teas don’t contain caffeine, which is why they’re known for their calming properties.
There are numerous types of herbal teas, all with their unique benefits. Some of the most popular herbal teas include:
Chamomile tea – Helps to reduce menstrual pain and muscle spasms, improves sleep and relaxation, and reduces stress
Rooibos – Improves blood pressure and circulation, boosts good cholesterol while lowering bad cholesterol, keeps hair strong and skin healthy, and provides relief from allergies
Peppermint – Contains menthol, which can soothe an upset stomach and serve as a cure for constipation, irritable bowel syndrome and motion sickness. This tea variety also offers pain relief from tension headaches and migraines.
Ginger – Helps to fight against morning sickness, can be used to treat chronic indigestion and helps to relieve joint pain caused by osteoarthritis
Hibiscus – Lowers blood pressure and fat levels, improves overall liver health, can starve off cravings for unhealthy sweets, and may prevent the formation of kidney stones
Green Tea Benefits
Green tea originates from China, where the leaves are processed with heat using a pan-firing or roasting method and Japan, where the leaves are more commonly steamed. Green tea is exceptionally high in flavonoids that can help boost your heart health by lowering bad cholesterol and reducing blood clotting. Studies show this type of tea can also help lower blood pressure, triglycerides and total cholesterol.
Other research has found that green tea has a possible impact on liver, breast, prostate and colorectal cancers. This tea variety has also shown to be anti-inflammatory, which helps keep your skin clear and glowing.
If you are not a fan of tea, there are also many different condiments for drinks to increase the flavor, such as many kinds of syrup like Flavored Syrup, Concentrated Syrup, Fruit Pulp Syrup, etc., and many Beverage Powder, Pudding Powder, Jelly Powder, Instant Seasoning Powder, Bubble Tea Powder and so on.