• 2015

Episode list

Professor Dave Explains
Vilsmeier Reaction
Mon, Aug 16, 2021
  • SUnknown
  • Vilsmeier Reaction
The Vilsmeier Reagent is produced by the action of various chlorophosphorus compounds on Dimethylformamide. The reagent is an electrophile that readily ads to double bonds. When followed by hydrolysis the result is the addition of an aldehyde group known as formylation.
0 /10
Types of Immune Cell Receptors
Tue, Jun 22, 2021
  • SUnknown
  • Types of Immune Cell Receptors
Our immune systems contains a variety of immune cell receptors. Some are specific to individual antigens. Other are general purpose pattern recognizing receptors. Here's an inventory with a description of what each receptor detects and what it does.
0 /10
The Alpha Centauri System
Mon, Apr 13, 2020
  • SUnknown
  • The Alpha Centauri System
If your interested in taking a trip to another star your closest option is a rocky planet around Proxima Centari. It is the only confirmed planet in the closest star system to Earth. But the star isn't exactly stable and the planet is in a close orbit so it may be tidally locked so you have a choice of the sweltering side of the freezing side of the planet. Even if you like this destination you're in for a long trip as it is over four light years away.
0 /10
VSEPR Theory and Molecular Geometry

SUnknownVSEPR Theory and Molecular Geometry

Mon, Oct 19, 2015
Valence Shell Electron Pair Repulsion (VSEPR) theory coupled with Lewis electron configurations, which identifies lone pair electrons, provides an effective way to predict the molecular geometry, or shape, and bond hybridization of a molecule around a central atom.
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The Laws of Thermodynamics, Entropy, and Gibbs Free Energy

SUnknownThe Laws of Thermodynamics, Entropy, and Gibbs Free Energy

Tue, Dec 15, 2015
Enthalpy, entropy, and the Gibbs Free Energy are measures of the energy, energy distribution and spontaneity of a system respectively. Professor Dave explains each with an analogy and an example. He also shows how systems can spontaneously transition to lower entropy.
0 /10
Lattice Structures in Ionic Solids

SUnknownLattice Structures in Ionic Solids

Mon, Sep 03, 2018
Professor Dave uses an animated three dimensional graphics program displaying several molecules to show how their molecular shapes effect the geometry of their crystal lattice.
0 /10
Pseudo Noble Gas Electron Configurations

SUnknownPseudo Noble Gas Electron Configurations

Thu, Dec 27, 2018
Pseudo Noble Gas Electron Configurations result when transition metals ionize by shedding one or two electrons from their highest s orbital leaving their highest d orbital complete.
0 /10
Complex Ion Formation

SUnknownComplex Ion Formation

Mon, Jan 07, 2019
Professor Dave explains the solvation process when salts dissolve in a liquid. Solvent molecules cluster around the a central metal ion forming a molecular complex ion with solvent molecules as ligands. Dave also displays typical chemical equations for the solvation reaction and explains how to balance the equations.
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Coordination Compounds: Geometry and Nomenclature

SUnknownCoordination Compounds: Geometry and Nomenclature

Thu, Jul 18, 2019
Here is Professor Dave's introduction to coordination compounds. These are compounds in which a ligand forms a covalent bond with a central metal atom. He provides several examples to explain the electron configuration, shape, number of ligands and ligand types. Then it's time to name them.
0 /10
Crystal Field Theory

SUnknownCrystal Field Theory

Thu, Jul 25, 2019
Professor Dave explains that the "crystal field splitting energy" effects how metal orbitals are filled by the various ligands in the spectrochemical series. Depending on which orbitals are filled first Crystal Field Theory predicts the structure, color and magnetic characteristics of coordination compounds.
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The Alpha Centauri System

SUnknownThe Alpha Centauri System

Mon, Apr 13, 2020
If your interested in taking a trip to another star your closest option is a rocky planet around Proxima Centari. It is the only confirmed planet in the closest star system to Earth. But the star isn't exactly stable and the planet is in a close orbit so it may be tidally locked so you have a choice of the sweltering side of the freezing side of the planet. Even if you like this destination you're in for a long trip as it is over four light years away.
0 /10
Types of Immune Cell Receptors

SUnknownTypes of Immune Cell Receptors

Tue, Jun 22, 2021
Our immune systems contains a variety of immune cell receptors. Some are specific to individual antigens. Other are general purpose pattern recognizing receptors. Here's an inventory with a description of what each receptor detects and what it does.
0 /10
Vilsmeier Reaction

SUnknownVilsmeier Reaction

Mon, Aug 16, 2021
The Vilsmeier Reagent is produced by the action of various chlorophosphorus compounds on Dimethylformamide. The reagent is an electrophile that readily ads to double bonds. When followed by hydrolysis the result is the addition of an aldehyde group known as formylation.
0 /10
Metallic Bonds

SUnknownMetallic Bonds

Mon, Jan 17, 2022
We naturally perceive metals as different from other materials. In metals the electrons are delocalized. This delocalization gives metals the special properties we observe and results in something of a hybrid bond that has properties between those of ionic and covalent bonds.
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Edit Focus

In naam der wet

In naam der wet

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The Kennedy Center Presents: Speak Truth to Power

The Kennedy Center Presents: Speak Truth to Power

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Champ: The Steve Mitchell Story

Champ: The Steve Mitchell Story

If he's said it once, he's said it a million times, 'I AM the real life Rocky.' And so it begins. Steve Mitchell launches into his life story for anyone willing to listen. And make no mistake - he's not telling you just to hear himself talk. Steve is asking you to help make him a star.

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The Running Hawker

The Running Hawker

The film, shot over a period of three years, follows the lives of running hawkers on the trains of South Bengal in India. These hawkers belong to that overwhelming majority of India's working population (over 90%) who are frequently described as 'informal'. This informality is constituted by a state of suspension in the zone between legality and illegality. Through the lives of four such hawkers among other characters, we have tried to address the question of the hawkers' livelihood at a time when the world of commodity trade is increasingly moving to bigger sites of supermarkets and malls in India. But what we also try to do is gauge what goes on in the interstices of livelihood. Our principal interlocutors then appear as instances for consideration of not only how the trade of 'hawking' is actualised but also how such questions of livelihood become embroiled with or are mediated through singular desires and ambitions. In this lies the representational challenge that our film has taken up.

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The Test

The Test

An entire Kenyan community of 50,000 participates in an HIV testing and counseling campaign are provided with a CarePack of products to prevent malaria, HIV and diarrheal disease as encouragement to take an HIV test. For the first time, people line up by thousands to take an HIV test--including adult men, a previously hard to reach group for HIV testing. Stigma of testing and knowing HIV status is reduced. Attitudes towards HIV+ people is confronted and overcome. Film shows how lives of five people change over course of one year from when they learn their status. The CarePack campaign was conceived and funded by a private Swiss company. Results have broad implications for achieving national testing goals and achieving Millennium Development Goals.

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Disrupt

Disrupt

A group of university students stand up against rape culture, and have to overcome great difficulties to make their voices heard.

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