56 résultats : Acquérir et s'approprier de nouvelles connaissances

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56 résultats

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résultats 41 à 50

Révélation et interprétation d’une Chromatographie sur Couche Mince

Description : Cette vidéo fait partie d'une série de 19 vidéos pour les gestes techniques en chimie (avec sous-titres français). Sans cette vidéo vous allez découvrir comment se servir d'une plaque CCM lors d'une purification d'un brut réactionnel pour isoler votre produit des autres impuretés. Nous verrons é ...

Mots clés : Schlenk, Travaux pratiques, Gestes techniques, Chimie, Chimie organique et moléculaire, Chromatographie sur couche mince, CCM, Interprétation, Révélation

Révélation et interprétation d’une Chromatographie sur Couche Mince

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Visualizing and interpreting a thin layer chromatography plate

Description : This video is part of a series of 19 videos for technical gestures in chemistry (with French subtitles). Without this video you will discover how to use a TLC plate during purification of a reaction crude to isolate your product from other impurities. We will also see the use of developers to allow ...

Mots clés : Plate, Organic Chemistry Lab, Technical gestures, Organic and molecular chemistry, TLC, Interpreting, Visualizing

Visualizing and interpreting a thin layer chromatography plate

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Preparation of a Thin Layer Chromatography (TLC) Plate

Description : This video is part of a series of 19 videos for technical gestures in chemistry (with French subtitles). In this video, we will show you how to perform thin layer chromatography also called TLC by chemists. Thin layer chromatography (TLC) is a separation method which allows the identification of ...

Mots clés : Plate, Organic Chemistry Lab, Technical gestures, TLC, Preparation, Organic and molecular chemistry

Preparation of a Thin Layer Chromatography (TLC) Plate

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Purification by column chromatography on silica gel

Description : This video is part of a series of 19 videos for technical gestures in chemistry (with French subtitles). During a chemical reaction, unwanted molecules can be observed in addition to your product. The reaction crude then requires purification which can be done on a chromatographic column, the pr ...

Mots clés : Organic Chemistry Lab, Purification, Technical gestures, Organic and molecular chemistry, Silica, Chromatograpy, Column, Gel

Purification by column chromatography on silica gel

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Preparation of a column chromatography on silica gel

Description : This video is part of a series of 19 videos for technical gestures in chemistry (with French subtitles). During a chemical reaction, after extraction, you obtain a reaction crude which requires purification to isolate your targeted product. The reaction crude can contain by-products, unreacted s ...

Mots clés : Organic Chemistry Lab, Technical gestures, Organic and molecular chemistry, Silica, Chromatograpy, Column, Gel, Preparation

Preparation of a column chromatography on silica gel

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Distillation at atmospheric pressure or under vacuum

Description : This video is part of a series of 19 videos for technical gestures in chemistry (with English subtitles). In this video, you will learn to carry out a distillation. This is a technique to purify a liquid product, or sometimes a solid, depending on its boiling point. A distillation can be carried ...

Mots clés : vacuum, technical gestures, organic chemistry lab, atmospheric pressure, distillation, organic and molecular chemistry

Distillation at atmospheric pressure or under vacuum

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Preparation of a sample for a liquid NMR analysis

Description : This video is part of a series of 19 videos for technical gestures in chemistry (with French subtitles). In this video, you will learn how to prepare a sample for NMR analysis. NMR, Nuclear Magnetic Resonance, is a spectroscopic technique used to determine the molecular structure of a product. This ...

Mots clés : Organic and molecular chemistry, Technical gestures, NMR analysis, Organic Chemistry Lab

Preparation of a sample for a liquid NMR analysis

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Using the Köfler hot bench

Description : This video is part of a series of 19 videos for technical gestures in chemistry (with French subtitles). In this video we will learn how to use a Köfler bench. This is an electrical device which makes it possible to determine the melting temperature of a synthetic product, either to characterize ...

Mots clés : Organic and molecular chemistry, Technical gestures, Organic chemistry Lab, Köfler hot bench

Using the Köfler hot bench

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Use of eletronic balances

Description : This video is part of a series of 19 videos for technical gestures in chemistry (with French subtitles). In this video, electronic scales are presented: the classic scale and the high precision scale. Electronic scales must be handled with great care and must always be kept clean. The electronic ...

Mots clés : Organic and molecular chemistry, Technical gestures, Organic Chemistry Lab, Electronic balances

Use of eletronic balances

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Méthodologie de la prise de notes

Description : Retrouvez des conseils pour améliorer votre prise de notes et vous entrainer à sélectionner, synthétiser, reformuler les informations. Découvrez également des ressources pour vous apprendre à retravailler vos notes.

Mots clés : prise de notes, méthodologie de travail

Méthodologie de la prise de notes

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