[Products Name]  Propolis powder, Propolis extract powder

[Specification]

Propolis content 60%,70%,80%

Water-soluble propolis powder 60%,70%,80%

[Gerneral feature]

1. Low antibiotics

2. Low PAHs, can approve to 76/769/EEC/German:LMBG;

3.Organic certified by ECOCERT, according to EOS & NOP organic standard;

4.Pure natural propolis;

5.High content of flavones;

6.Anti-block;

7. Manufacturer supply.

              
[Packaging]
1. 5kg/aluminum foil bag, 25kgs/carton.

[How to get it]

First, we collect raw propolis from beehives, then extract by low temperature with ethanol. Filter and concentrate, we get the pure propolis block at 98%. Then Low temperature crushing, adding edible and medicinal excipients, finally we get propolis powder.

[Introduction]

Propolis comes from the substance like natural resin, which is collected by the bees from exudates of plants branches and bud the chemical substances of Propolis are found to be various, such as beeswax, resin, incense lipids, aromatic oil, fat-soluble oils, pollen and other organic matter. Studies have shown that the source of propolis resin in material has three types: bees collected plants secreted fluid, secretion in vivo metabolism of bee, and involvement in the process of forming the material.

We can supply Propolis Extract with food-grade and medicine-grade .The raw materiall is came from non-polluting food grade propolis .Propolis extract was made of high-grade propolis. It maintains the propolis effective ingredients during the procedure of extraction under constant low temperature , taking off the useless substances and sterilization.

[Function]

Propolis is a natural product processed by bees mixed with glutinous and its secretion.

Propolis contains more than 20 kinds of useful flavonoids, rich vitamins, enzymes, amino acids and other microelements, etc. Propolis is called “purple gold” owing to its valued nutrients.

Propolis can remove free radical, lower blood sugar and blood fat, soften blood vessels, improve micro-circulation, enhance immunity, anti-bacteria and anti-cancer.

Chemistry playlist: https://www.youtube.com/playlist?list=PL_hX5wLdhf_KyuOalV6rwHjo810Zaa6xq

more at https://scitech.quickfound.net/

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…

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