[Latin Name]  Ribes nigrum

[Specification] Anthocyanosides≥25.0%

[Appearance] Purple black fine powder

Plant Part Used: Fruit

[Particle size] 80Mesh

[Loss on drying] ≤5.0%

[Heavy Metal] ≤10PPM

[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 Black currant?]

The black currant bush is a 6-foot tall perennial that entered the world somewhere in the regions that include northern Asia and central and northern Europe. Its flowers display five reddish-green to brownish petals. The celebrated black currant fruit is a glossy-skinned berry that carries several seeds laden with marvelous nutritional and curative treasures. An established bush can produce ten pounds of fruit per season

[Benefits]

1. Vision help my eyesight

2. Urinary Tract Health

3. Ageing & Brain Function.

4. Natural Brain Boost

5. Digestion & Fighting Cancer

6. Reducing Erectile Dysfunction

Shwet musali, biologically known as Asparagus adscendens, is extensively recommended for improved sexual behavior and increasing fertility by Ayurveda. Regular intake helps curing problems related to sexual behavior in addition to improving and enhancing fertility thereby increasing sperm count. It improves overall functioning of reproductive system.

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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