[Latin Name] Epimedium sagittatnm Maxim

[Plant Source] Leaf

[Specification] Icariin 10% 20% 40% 50%

[Appearance] Light yellow fine powder

Plant Part Used: Leaf

[Particle size]80Mesh

[Loss on drying] ≤5.0%

[Heavy Metal] ≤10PPM

[Pesticide residue] EC396-2005, USP 34, EP 8.0, FDA

[Storage] Store in cool & dry area, keep away from the direct light and heat.

[Shelf life] 24 Months

[Package] Packed in paper-drums and two plastic-bags inside.

[Net weight] 25kgs/drum

[What is Epimedium?]

Epimedium extract is a popular aphrodisiac supplement and herbal sexual performance enhancer.It has a long history of traditional use in China for the alleviation of erectile dysfunction and for improving libido and fertility.

Also known as Horny Goat Weed, this supplement supposedly got its name after a farmer noticed that his flock of goats were particularly aroused after eating flowers of a specific type. These Epimedium flowers contain icariin, which is a natural compound that increases blood flow to sexual organs and promotes sex drive. Icariin has been found to increase Nitric Oxide synthesis as well as inhibiting the activity of the PDE-5 enzyme

[Icariin in Epimedium Extract]

Epimedium extracts powder contain an active phytochemical called icariin.Icariin has been observed to exhibit a number of useful traits, including renoprotective (liver protecting) hepatoprotective (kidney protecting), cardioprotective (heart protecting) and neuroprotective (brain protecting) effects.

It is also an antioxidant and can cause vasodilation. It exhibits antimicrobial characteristics and is thought to act as an aphrodisiac.

Icariin is classified as a flavonol glycoside, which is a type of flavonoid. Specifically, icariin is the 8-prenyl derivation of kaempferol 3,7-O-diglucoside, a prevalent and important flavonoid.

[Function]

1. Combat mental and physical fatigue;

2. Induce vasodilation and improve circulation;

3. Lower blood pressure in hypertensive patients;

4. Improve symptoms of erectile dysfunction (ED) through its action as a PDE5  inhibitor;

5. Improve the use of free testosterone in the blood;

6. Increase libido;

7. Alleviate symptoms of depression and stimulate improved cognitive function;

8. Protect against neurological degeneration.

Rave Culture is one of Britain’s great cultural exports, but after its first wave in the late eighties and early nineties, it was soon forced into the underground by stringent new laws and superclubs. But forward 25 years into in the midst of a nationwide purge on the nation’s nightlife, where nearly half of all British clubs have shut down in the last decade, and a new kind of scene has emerged.

Clive Martin investigates this 21st century version of Rave, where young people break into disused spaces with the help of bolt-cutters and complicated squatting laws, to suck on balloons and go hard into the early morning.

But with the police using increasingly extreme tactics to clamp down on these parties, and more than one fatality causing nationwide media panic, can the scene survive?

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Overview of how plastics & synthetic rubbers are made.

Reupload of a previously uploaded film with improved video & sound.

Public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).

https://creativecommons.org/licenses/by-sa/3.0/

https://en.wikipedia.org/wiki/Polymer

A polymer is a large molecule (macromolecule) composed of repeating structural units. These sub-units are typically connected by covalent chemical bonds. Although the term polymer is sometimes taken to refer to plastics, it actually encompasses a large class of compounds comprising both natural and synthetic materials with a wide variety of properties.

Because of the extraordinary range of properties of polymeric materials, they play an essential and ubiquitous role in everyday life. This role ranges from familiar synthetic plastics and elastomers to natural biopolymers such as nucleic acids and proteins that are essential for life.

Natural polymeric materials such as shellac, amber, wool, silk and natural rubber have been used for centuries. A variety of other natural polymers exist, such as cellulose, which is the main constituent of wood and paper. The list of synthetic polymers includes synthetic rubber, Bakelite, neoprene, nylon, PVC, polystyrene, polyethylene, polypropylene, polyacrylonitrile, PVB, silicone, and many more.

Most commonly, the continuously linked backbone of a polymer used for the preparation of plastics consists mainly of carbon atoms. A simple example is polyethylene (‘polythene’ in British English), whose repeating unit is based on ethylene monomer. However, other structures do exist; for example, elements such as silicon form familiar materials such as silicones, examples being Silly Putty and waterproof plumbing sealant. Oxygen is also commonly present in polymer backbones, such as those of polyethylene glycol, polysaccharides (in glycosidic bonds), and DNA (in phosphodiester bonds).

Polymers are studied in the fields of polymer chemistry, polymer physics, and polymer science…

Polymerization is the process of combining many small molecules known as monomers into a covalently bonded chain or network. During the polymerization process, some chemical groups may be lost from each monomer. This is the case, for example, in the polymerization of PET polyester. The monomers are terephthalic acid (HOOC-C6H4-COOH) and ethylene glycol (HO-CH2-CH2-OH) but the repeating unit is -OC-C6H4-COO-CH2-CH2-O-, which corresponds to the combination of the two monomers with the loss of two water molecules. The distinct piece of each monomer that is incorporated into the polymer is known as a repeat unit or monomer residue…

https://en.wikipedia.org/wiki/Synthetic_rubber

Synthetic rubber is any type of artificial elastomer, invariably a polymer. An elastomer is a material with the mechanical (or material) property that it can undergo much more elastic deformation under stress than most materials and still return to its previous size without permanent deformation.About 15 billion kilograms of rubbers are produced annually, and of that amount two thirds is synthetic…

Natural vs synthetic rubber

Natural rubber, coming from latex, is mainly poly-cis-isoprene containing traces of impurities. Although it exhibits many excellent properties, natural rubber is often inferior to synthetic rubbers, especially with respect to its thermal stability and its compatibility with petroleum products.

Synthetic rubber is made by the polymerization of a variety of petroleum-based precursors called monomers. The most prevalent synthetic rubbers are styrene-butadiene rubbers (SBR) derived from the copolymerization of styrene and 1,3-butadiene. Other synthetic rubbers are prepared from isoprene (2-methyl-1,3-butadiene), chloroprene (2-chloro-1,3-butadiene), and isobutylene (methylpropene) with a small percentage of isoprene for cross-linking. These and other monomers can be mixed in various proportions to be copolymerized to produce products with a range of physical, mechanical, and chemical properties. The monomers can be produced pure and the addition of impurities or additives can be controlled by design to give optimal properties. Polymerization of pure monomers can be better controlled to give a desired proportion of cis and trans double bonds…