Home
Search results “Determining asymmetric centers of cholesterol”
Chiral Centers
 
11:09
Brief discussion on determining chiral centers
Views: 43478 moballer12
How Many Chiral Centers are in this molecule?
 
05:52
Counting the number of Chiral Centers in a molecule. How many atoms have FOUR different things attached to it? Lone pairs count as "things". This is Penicillin V. Check me out: http://www.chemistnate.com
Views: 145639 chemistNATE
Finding Chirality Centers
 
06:03
This organic chemistry video tutorial explains how to find the chirality centers in a molecule. Subscribe: https://www.youtube.com/channel/UCEWpbFLzoYGPfuWUMFPSaoA?sub_confirmation=1 Access to Premium Videos: https://www.patreon.com/MathScienceTutor https://www.facebook.com/MathScienceTutoring/ New Organic Chemistry Playlist https://www.youtube.com/watch?v=6unef5Hz6SU&index=1&list=PL0o_zxa4K1BXP7TUO7656wg0uF1xYnwgm&t=0s
Optical activity calculations | Stereochemistry | Organic chemistry | Khan Academy
 
08:03
How to calculate specific rotation and % enantiomeric excess. Watch the next lesson: https://www.khanacademy.org/science/organic-chemistry/stereochemistry-topic/diastereomers-meso-compounds/v/stereoisomers-enantiomers-diastereomers-constitutional-isomers-and-meso-compounds?utm_source=YT&utm_medium=Desc&utm_campaign=organicchemistry Missed the previous lesson? https://www.khanacademy.org/science/organic-chemistry/stereochemistry-topic/optical-activity/v/optical-activity-new?utm_source=YT&utm_medium=Desc&utm_campaign=organicchemistry Organic Chemistry on Khan Academy: Carbon can form covalent bonds with itself and other elements to create a mind-boggling array of structures. In organic chemistry, we will learn about the reactions chemists use to synthesize crazy carbon based structures, as well as the analytical methods to characterize them. We will also think about how those reactions are occurring on a molecular level with reaction mechanisms. Simply put, organic chemistry is like building with molecular Legos. Let's make some beautiful organic molecules! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Organic Chemistry channel: https://www.youtube.com/channel/UCNKPjijOc0WEJ7DIV_Vay3g?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Identifying Functional Groups in Organic Molecules 003 - cholesterol, fatty acid, ester
 
02:36
Which functional groups are present in the pictured molecules: cholesterol, an unsaturated fatty acid, and a sweet smelling compound.
What is the hybridization of each atom in this molecule?
 
04:45
More free chemistry help videos: http://www.nathanoldridge.com/chemistry-videos.html This is the easiest way to figure out how each atom's orbitals are hybridized.
Views: 195865 chemistNATE
Assigning R and S to Chirality Centers
 
11:20
The basic method for assigning R and S to a chirality center with several examples.
Views: 12686 drspreston
Cholesterol Molecule - 3D - Three-dimensional model
 
00:39
Modelo 3D de uma molécula de Colesterol
Syn Addition and Anti Addition - Enantiomers, Meso Compounds, Constitutional Isomers & Diastereomers
 
31:14
This organic chemistry video tutorial explains the difference between syn addition and anti addition reactions. It discusses how to determine if you get 1 or 2 major products in an electrophilic alkene addition reaction. It also explains how to determine the product will be a pair of enantiomers, diastereomers, meso compounds or constitutional isomers. Here is a list of topics: 1. Syn Addition vs Anti Addition Stereochemistry 2. Cis and Trans Geometric Isomers of Alkenes 3. Halogenation of Alkenes - Bromination and Chlorination 4. Halohydrin Formation Reaction 5. Syn Hydroxylation Using KMnO4 and OH- 6. Enantiomers vs Diastereomers 7. Meso Compounds 8. Constitutional Isomers vs Stereoisomers 9. Chiral Centers and Symmetrical vs Assymetrical Molecules 10. Chiral Carbon Atoms - 4 Different Groups 11. Epoxidation Reaction Followed by Hydroxylation 12. Hydrogenation of Alkenes Using Deuterium and Platinum Catalyst
Axial and Equatorial Bonds In Cyclohexane
 
02:54
This video discusses the difference between the axial and equatorial bonds in cyclohexane.
How many isoprene units are in squalene...
 
00:53
BCH 4024: Dr Long Lecture 15 Review Questions- -Exam 2 www.teachingcenter.ufl.edu/vsi
Views: 8410 UF Teaching Center
D.7 Taxol (HL)
 
02:14
Understandings: Taxol is a drug that is commonly used to treat several different forms of cancer. Taxol naturally occurs in yew trees but is now commonly synthetically produced. Applications and skills: Explanation of how taxol (paclitaxel) is obtained and used as a chemotherapeutic agent.
Views: 7741 Mike Sugiyama Jones
Calculate the Number of Stereoisomers 002
 
05:10
How many stereoisomers can be drawn for the pictured molecule? Interviews 1) Revell, K. (November 16, 2016) “An Interview with Heath Giesbrecht, Part I” The Macmillan Community https://community.macmillan.com/groups/flipped-chemistry/blog/2016/11/17/an-interview-with-heath-giesbrecht-part-1 2) Revell, K. (November 16, 2016) “An Interview with Heath Giesbrecht, Part II” The Macmillan Community https://community.macmillan.com/groups/flipped-chemistry/blog/2016/11/17/an-interview-with-heath-giesbrecht-part-2
Circle and Identify Functional Groups (Cocaine)
 
01:23
Circle and identify the functional groups contained in cocaine. ———————————— INTERVIEW 1) Revell, K. (November 16, 2016) “An Interview with Heath Giesbrecht, Part I” The Macmillan Community https://community.macmillan.com/groups/flipped-chemistry/blog/2016/11/17/an-interview-with-heath-giesbrecht-part-1 2) Revell, K. (November 16, 2016) “An Interview with Heath Giesbrecht, Part II” The Macmillan Community https://community.macmillan.com/groups/flipped-chemistry/blog/2016/11/17/an-interview-with-heath-giesbrecht-part-2 ———————————— INTERDISCIPLINARY ART LECTURE: 1) Giesbrecht, H., Peet, K. (January 20, 2016) “Translating Failure” WEDGE_SPACE https://vimeo.com/152432030 ———————————— FACEBOOK: https://www.facebook.com/profheath/ TWITTER: https://twitter.com/prof_heath
Circle and Identify Functional Groups In an Organic Molecule (Vitamin C) 001
 
02:12
Circle and identify the functional groups found in ascorbic acid (Vitamin C). Interviews 1) Revell, K. (November 16, 2016) “An Interview with Heath Giesbrecht, Part I” The Macmillan Community https://community.macmillan.com/groups/flipped-chemistry/blog/2016/11/17/an-interview-with-heath-giesbrecht-part-1 2) Revell, K. (November 16, 2016) “An Interview with Heath Giesbrecht, Part II” The Macmillan Community https://community.macmillan.com/groups/flipped-chemistry/blog/2016/11/17/an-interview-with-heath-giesbrecht-part-2
Organic Chemistry Stereochemistry R S Configuration
 
20:05
This video is about Organic Chem
Views: 166 Bryan Stender
Lecture Designing Organic Syntheses 22 Prof  G  Dyker 130115
 
55:47
Terpenoid Hydrocarbons, Longifolene and Isocomene
Views: 2213 ChemieRUB
Fischer to Haworth and Chair for Glucose and Fructose (Vid 5 of 5)
 
14:42
http://leah4sci.com/fischer Presents: Converting a Fischer Projection to Haworth and Chair conformation for Glucose, and Fructose Fischer to Haworth Catch this entire video series + practice quiz and cheat sheet on my website: http://leah4sci.com/fischer Video 5 of 5 in my in my Fischer Projection series shows you my shortcut for converting from the linear D-Glucose to a Haworth Ring and chair conformation, and then a similar trick for converting D-Fructose from linear to cyclic form. Chair Conformations Tutorial: http://leah4sci.com/drawing-chair-conformations-and-ring-flips-for-cyclohexane/ Is your MCAT just around the corner? Grab a free copy of my ebook "MCAT Exam Strategy - A 6 Week Guide To Crushing The MCAT" at http://mcatexamstrategy.com/ebook Need more help? I offer private online MCAT tutoring. Details http://leah4sci.com/mcat-tutoring/ Have questions? Leave a comment below this video or hit me up on social media: Twitter: http://twitter.com/leah4sci Facebook: https://www.facebook.com/mcatexamstrategy Google+: https://plus.google.com/+LeahFisch/
Views: 180019 Leah4sciMCAT
Algebra Application: Exponents: MCAT: Section 5B: Calculating the number of stereoisomers
 
01:38
How many stereoisomers exist for a compound with 5 stereocenters?
Views: 66 memedicine
Identify Functional Groups in Molecule 001
 
03:09
Identify the functional groups in the following molecule.
Identifying the Most Acidic Hydrogen In a Molecule 016
 
02:19
Identify the most acidic hydrogen in methyl 2-(cyanomethyl)benzoate. Interviews 1) Revell, K. (November 16, 2016) “An Interview with Heath Giesbrecht, Part I” The Macmillan Community https://community.macmillan.com/groups/flipped-chemistry/blog/2016/11/17/an-interview-with-heath-giesbrecht-part-1 2) Revell, K. (November 16, 2016) “An Interview with Heath Giesbrecht, Part II” The Macmillan Community https://community.macmillan.com/groups/flipped-chemistry/blog/2016/11/17/an-interview-with-heath-giesbrecht-part-2
Various problems (See description below for problem wording)
 
10:54
BCH 4024 Exam 2 Review http://teachingcenter.ufl.edu/vsi Problems: "In studying the primary sequence of a newly discovered membrane protein..." "In your new MP, you also note a hydrophilic sequence..." "At pH 7, tryptophan crosses a lipid bilayer..." "If a lipid flippase can maintain a gradient..."
Views: 552 UF Teaching Center
If a lipid flippase can maintain a gradient...
 
03:15
BCH 4024 Dr. Lecture 17-18 Exam 2 www.teachingcenter.ufl.edu/vsi
Views: 1327 UF Teaching Center
What does ergosterol mean?
 
00:48
What does ergosterol mean? A spoken definition of ergosterol. Intro Sound: Typewriter - Tamskp Licensed under CC:BA 3.0 Outro Music: Groove Groove - Kevin MacLeod (incompetech.com) Licensed under CC:BA 3.0 Intro/Outro Photo: The best days are not planned - Marcus Hansson Licensed under CC-BY-2.0 Book Image: Open Book template PSD - DougitDesign Licensed under CC:BA 3.0 Text derived from: http://en.wiktionary.org/wiki/ergosterol
5. Enzymes and Catalysis
 
01:05:51
MIT 5.07SC Biological Chemistry, Fall 2013 View the complete course: http://ocw.mit.edu/5-07SCF13 Instructor: JoAnne Stubbe In this classroom lecture, Professor Stubbe focuses on enzymes as catalysts. She describes the theory and mechanics of catalysis and explains why enzymes are so important. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 23227 MIT OpenCourseWare
How to work out the number of carbon atoms in a complex molecule
 
07:49
A worked example from F324, showing how to work out the number of carbon atoms in a complex molecule and identify chiral centres
Views: 2367 Dr Stan Fowler
Latest Advances in Stroke Treatment
 
57:02
For anyone having a stroke, time is everything. Getting help quickly can make the difference between recovery and disability. You will take away an understanding of stroke risk factors and new stroke therapies from this discussion. Speaker: Jeremy Heit, MD
Views: 30212 Stanford Health Care
Diagnosing if Heavy Upper Eyelids are Caused by Extra Skin and Fat, or Ptosis
 
09:31
A 28-year-old woman feels that her lids are very heavy for a younger person. To open her lids, she must raise her forehead which gave her horizontal lines on her forehead. She wants to know the right procedure for her eyelids. Dr. Amiya Prasad is a cosmetic oculofacial plastic surgeon. This is a surgeon who first specialized in eye surgery before specialized training in cosmetic surgery of the eyes and face. Eyelid surgery relating to upper and lower eyelids and ptosis surgery are things he deals with every day. In order to know the right procedure, he first differentiates between dermatochalasis and ptosis. Dermatochalasis is excess skin over the eye. This is why when someone raises their eyebrows, the physical weight of the eyelids is being reduced and people are unconsciously raising eyebrows. It is very common for a patient to go visit a dermatologist and get Botox® injections to their forehead to reduce their forehead line. Ptosis on the other hand means drooping of the eyelid and is defined by looking at the margin of the eyelid - the point where the eyelashes are relative to the pupil or the center of the eye. When patients come to Dr. Prasad’s practice, he first does a ptosis evaluation. It does appear that this woman’s right eye is slightly lower than her left in the photos she submitted. That doesn’t necessarily mean that she needs ptosis repair. The evaluation of ptosis requires measurements that include the margin reflex distance which is from the center of the pupil, light reflex to the margin, and lastly levator muscle function. The levator muscle is responsible for lifting the eyelid. Another thing that he does is he rolls up the skin of the upper eyelid using a Q-Tip to see if the eyelid is still low even after the skin is lifted. That is a critically important step in determining whether or not a person is a candidate for a pure blepharoplasty which is the removal of skin, extra fat and other soft tissue in the upper eyelids alone or a combination of a ptosis operation. Ptosis operation involves the levator muscle. It’s a completely different surgery compared to blepharoplasty because this muscle has to be handled just right, and it is not a procedure that most general or unspecialized plastic surgeons perform. However, the presence of ptosis doesn’t necessarily mean that it always has to be addressed. Within the normal population, it is generally acceptable to have a difference of 1-2 millimeters between the two eyes. A lot of patients don’t come in unless they are bothered because it’s gotten worse, or they are concerned that one eye is lower than the other significantly. Often, just addressing the physical weight of the eyelid skin is enough for someone to be satisfied and to feel good about their appearance. Dr. Prasad explains that it is important that patients meet with qualified experienced cosmetic surgeons and he would advise that they go to someone who understands ptosis so that way this is something that is not overlooked. Most doctors who perform eyelid surgery like general plastic surgeons and facial plastic surgeons do not do ptosis surgery because it’s not part of their routine. It’s best to meet with a cosmetic oculofacial plastic surgeon to get a proper examination and learn about options. In Dr. Prasad’s practice, he does both ptosis and blepharoplasty surgery under local anesthesia with LITE™ IV sedation. During ptosis surgery specifically, because the muscle is so sensitive, he actually lets the patient open their eyes during the procedure to see what the height and contour of the eyelid appears. He even sits patient up to make sure the height, contour and symmetry is achieved. Patients never feel any pain because they’re already numb and it ensures that they will look good as it appears during the surgery. For more information about ptosis surgery, please visit our website: http://prasadcosmeticsurgery.com/prasad-face-eyes/eyelifts/eyelid-ptosis-surgery/ For more information about blepharoplasty, please visit: http://prasadcosmeticsurgery.com/prasad-face-eyes/eyelifts/upper-eyelift-surgery/ To know more about LITE™ anesthesia, please visit: http://prasadcosmeticsurgery.com/dr-amiya-prasad-nyc-new-york/lite-anesthesia-for-cosmetic-surgery/
Views: 7918 Amiya Prasad, M.D.