[Latin Name] Lycium barbarum L.

[Plant Source]from China

[Specifications]20%-90%Polysaccharide

[Appearance] Reddish brown powder

Plant Part Used:Fruit

[Particle size] 80 Mesh

[Loss on drying] ≤5.0%

[Heavy Metal] ≤10PPM

[Shelf life] 24 Months

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

[Net weight] 25kgs/drum

Product Description

The wolfberry is harvested when the fruit is orange red. After drying to the skin wrinkles, it is exposured to the skin moist and soft fruit, then removed the stem.  Wolfberry is a kind of rare traditional Chinese medicine which is very rich in nutrients and has high medicinal value The materials contain not only such as iron, phosphorus, calcium, but also a lot of sugar, fat and protein. It also contains polysaccharide with good health care function to human body and organic germanium that is beneficial to human’s intelligence.

Function

1. With the function of regulating immune, inhibiting tumor growth and cell mutation;

2. With the function of lipid-lowering and anti-fatty liver;

3. Promoting the function of hematopoietic;

4. With the function of anti-tumor and anti-aging.

Applications:

1. Applied in food field, it can be produced into wine, canned, condensed juice and other more nourishment;

2. Applied in health product field , it can be made into suppositories, lotions, injection, tablets, capsules and other dosage forms to regulate immunity;

3. Applied in pharmaceutical field, effectively treating cancer, hypertension, cirrhosis and other diseases;

4. Applied in cosmetics field, it can prevent skin aging and improve skin elasticity.

Biochemistry: Protein structure. Drawing protein chains. Peptide bonds. How to determine the net charge of a peptide chain at different pH’s. Primary structure. Weak interactions; electrostatic interactions, hydrogen bonds, Van der Waals interactions. Hydrophobic effect. Disulfide bonds. Secondary structure; the alpha helix, beta-pleated sheets. Alpha-keratin. Collagen. Tertiary structure. Quaternary structure

This is a recording of a tutoring session, posted with the student’s permission.

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For a list of all the available video series, arranged in suggested viewing order, go to my website.

For the “Acids and bases” handout discussed in these videos, click here:

https://www.freelance-teacher.com/acid_base_reactions.pdf

For the “Amino acids” handout discussed in these videos, click here:

https://www.freelance-teacher.com/amino_acids.pdf

For a document containing the video (1) homework problems, click here:

https://freelance-teacher.com/protein_structure_homework1.pdf

TABLE OF CONTENTS
VIDEO (1)
0:00 Drawing protein chains. Peptide bonds
23:40 How to determine the net charge of a peptide chain at different pH’s
40:10 Characteristics of peptide bonds

VIDEO (2)
Homework
φ and ψ
Primary structure
Secondary structure. The alpha helix
Weak interactions. Electrostatic interactions
Hydrogen bonds

VIDEO (3)
Homework
Functions of proteins
Van der Waals interactions
Hydrophobic effect
The alpha helix, continued
Alpha-keratin
Collagen

VIDEO (4)
Homework
Disulfide bonds
Disulfide bonds in alpha-keratin
Homework, continued. More about collagen
Beta-pleated sheets

VIDEO (5)
Homework
Tertiary structure
Quaternary structure

VIDEO (6)
Homework

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