[Latin Name] Cinnamomun camphcra

[Plant Source] It is extracted from Ginkgo Biloba Leaf.

[Specifications]

1, Ginkgo Biloba Extract 24/6

Total Ginkgo flavone glycosides 24%

Total terpene lactones 6%

2, Ginkgo Biloba Extract 24/6

Total Ginkgo flavone glycosides 24%

Total terpene lactones 6%

Ginkgolic acid 5ppm

3,CP2005

Total Ginkgo flavone glycosides 24%

Quercatin: kaemperol 0.8–1.5

Total terpene lactones 6%

Ginkgolic acid <5ppm

4.Germany Standard

Total Ginkgo Flavone Glycosides 22.0%-27%

Total Terpene Lactones 5.0%-7.0%

Bilobalides 2.6%-3.2%

Ginkgolic acid <1ppm

5.Water-Soluble Ginkgo Biloba Extract 24/6

Water Solubility: 5g Ginkgo Biloba Extract will be dissolved completely in 100g water

Total Ginkgo Flavone Glycosides 24.0%

Total Terpene Lactones 6.0%

Ginkgolic acid <5.0ppm

[Appearance] Light yellow fine powder

[Particle size] 80 Mesh

[Loss on drying] £ 5.0%

[Heavy Metal] £10PPM

[Extract solvents] Ethanol

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

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

[Function]

Expanding blood vessel, resisting insufficient blood and oxygen deficit, increasing blood flow, improving cerebral arteries and distal

blood flow. Promoting cerebral circulation metabolism, improving memory function, resisting depression, resisting lipidic overoxidation,

protecting liver damage.

In clinic, curing high blood pressure, hyperlipoidemia, coronary heart disease, angina pectoris, arterial sclerosis, cerebral embolism,

senile dementia, primary and periodic dropsy, acute drumming in the ears, epicophosis, a variety of body function in disorder, dizziness

and so on.

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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