[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

Moof’s Medical Biochemistry Video Course: https://moof-university.thinkific.com/courses/medical-biochemistry-for-usmle-step-1-exam

For Related Practice Problems with Worked Video Solutions on Carbohydrates, visit courses.moofuniversity.com.

In this video, I introduce the topic of carbohydrates / sugars.

(CH2O)n is the general formula for a monosaccharide or simple sugar. Glucose (C6H12O6) is a very common and very important example.

Carbohydrate names end in “-ose”
Aldoses have aldehydes in their straight-chain forms (depicted as Fischer projections)
Ketones have ketones in their straight-chain forms (depicted as Fischer projections)

There are D sugars and L sugars, and the convention is based on the Fischer projections of D-glyceraldehyde and L-glyceraldehyde. The two are enantiomers because they are opposite in absolute configuration at all of their chiral centers (which, in this case, is only one). D-glyceraldehyde has an OH on the right, while L-glyceraldehyde has an OH on the left. Sugars that have their last OH on the right are D sugars; sugars that have their last OH are L sugars. Most sugars that exist in life forms are D sugars.

In the video, I depict the difference between Fischer projections (straight chain sugars) and Haworth projections (sugars in their ring forms). I also briefly mention the idea of anomers as a class of epimers, which are a specific class of diastereomers.

Diastereomers are stereoisomers that differ in at least one, but not all chiral centers.
Epimers are stereoisomers that differ at only one chiral center (they are a subclass of diastereomers).
Anomers are stereoisomers that differ at only one chiral center when that chiral center is specifically the anomeric carbon, the stereocenter that forms when a sugar forms a ring. Anomers are a subclass of epimers.

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UCI Chem 128 Introduction to Chemical Biology (Winter 2013)
Lec 15. Introduction to Chemical Biology — Glycobiology & Polyketides — Part 1
View the complete course: https://ocw.uci.edu/courses/chem_128_introduction_to_chemical_biology.html
Instructor: Gregory Weiss, Ph.D.

License: Creative Commons BY-NC-SA
Terms of Use: https://ocw.uci.edu/info.
More courses at https://ocw.uci.edu

Description: Introduction to the basic principles of chemical biology: structures and reactivity; chemical mechanisms of enzyme catalysis; chemistry of signaling, biosynthesis, and metabolic pathways.

Introduction to Chemical Biology (Chem 128) is part of OpenChem: https://ocw.uci.edu/collections/open_chemistry.html
This video is part of a 18-lecture undergraduate-level course titled “Introduction to Chemical Biology” taught at UC Irvine by Professor Gregory Weiss.

Recorded March 5, 2013.

Index of Topics:
0:00:19 Carbohydrates
0:03:15 Glycosylated Proteins
0:07:25 Extending Oligosaccharides one Monomer at a Time
0:08:26 More Knee Join Oligosacchardies
0:10:25 Snot and Mucus: Anionic Polysaccharides
0:13:21 N-Linked Glycosides: Added as Complex Oligosaccharides
0:22:56 What is the Function of Glycosylation?
0:25:37 Cell Culture Production of Proteins
0:27:54 Glucoronidation Used to Designate Small Molecules for Excretion
0:29:49 Glucose Homeostasis
0:31:39 Non-Enzymatic Glycosylation
0:35:29 Sweetners: Tase Good for the Calories
0:41:00 Terpenes and Polyketides
0:45:09 Nature Prefers Thioesters for the Claisen
0:48:06 Rapid Exchange of Thioesters
0:49:28 Fatty Acid Synthesis by Polyketide

Required attribution: Weiss, Gregory Introduction to Chemical Biology 128 (UCI OpenCourseWare: University of California, Irvine), https://ocw.uci.edu/courses/chem_128_introduction_to_chemical_biology.html. [Access date]. License: Creative Commons Attribution-ShareAlike 3.0 United States License (https://creativecommons.org/licenses/by-sa/3.0/us/deed.en_US).