Скачать с ютуб Extraction techniques for natural products/Percolation/Soxhlet extraction technique/Decoction в хорошем качестве

Extraction techniques for natural products/Percolation/Soxhlet extraction technique/Decoction

Extracting natural products, often from plant or animal sources, is a crucial step in obtaining bioactive compounds for various applications, including pharmaceuticals, food, and cosmetics. The choice of extraction technique significantly impacts the yield, purity, and quality of the final product. These techniques can be broadly categorized as traditional/conventional and modern/advanced methods. Here's a description of common extraction techniques: Traditional/Conventional Extraction Methods These methods are often simple, cost-effective, and have been used for centuries, though they can be time-consuming and less efficient for certain compounds. Maceration: Principle: Solid-liquid extraction where the ground natural material is soaked in a suitable solvent (menstruum) at room temperature or with gentle heating in a closed container. The active ingredients diffuse into the solvent. Process: Coarsely powdered material is immersed in the solvent, stirred or shaken periodically, and left for a period (hours to days). The extract (miscella) is then separated by filtration or decantation, and the solvent is evaporated. Advantages: Simple, inexpensive, suitable for heat-sensitive compounds. Disadvantages: Time-consuming, relatively low yield, large solvent volumes may be required. Percolation: Principle: A continuous solid-liquid extraction method where the solvent is continuously passed through a bed of the finely powdered natural material. The solvent permeates the material, leaching out compounds as it flows downwards. Process: Ground material is moistened and packed into a percolator (a cone-shaped vessel). Solvent is added from the top and allowed to drip slowly from the bottom, continuously washing the material. Advantages: More efficient than maceration due to continuous flow, better solvent utilization, higher extraction rates. Disadvantages: Time-consuming, large solvent consumption, not suitable for materials that swell significantly. Decoction: Principle: Similar to maceration but involves boiling the plant material in water for a specified period. This is suitable for water-soluble and heat-stable compounds. Process: Dried, powdered plant material is boiled in a specified volume of water, then cooled and filtered. Advantages: Effective for extracting water-soluble and heat-stable compounds, simple. Disadvantages: Not suitable for thermolabile (heat-sensitive) or volatile compounds, may degrade some compounds. Infusion: Principle: Involves suspending the natural material in hot or cold solvent for a short period. Process: Finely powdered material is placed in a container, and hot or cold solvent is poured over it and allowed to soak for a brief time. Advantages: Suitable for readily soluble bioactive constituents, good for preparing fresh extracts. Disadvantages: Less exhaustive extraction, limited to easily soluble compounds. Digestion: Principle: Maceration carried out with the application of moderate heat (around 50°C). The heat helps to decrease solvent viscosity and enhance the diffusion of compounds. Advantages: Improved extraction efficiency compared to cold maceration for some compounds. Disadvantages: Still can be time-consuming. Soxhlet Extraction: Principle: A continuous solid-liquid extraction method using a hot solvent that is repeatedly cycled through the sample. The solvent evaporates, condenses, and drips onto the material in a thimble, continuously extracting compounds. Process: Ground material is placed in a thimble within the Soxhlet apparatus. Solvent in a flask is heated, its vapor rises, condenses in a condenser, and drips into the thimble. Once the solvent level in the thimble reaches a certain point, it siphons back into the flask, carrying the extracted compounds. This cycle repeats. Advantages: High extraction efficiency, less solvent consumption compared to maceration/percolation (due to recycling), suitable for exhaustive extraction. Disadvantages: Not suitable for thermolabile compounds due to continuous heating, long extraction times.#extraction #extraction2 #extractionshooters #extraction3trailer #extractionfightscene #extractiontrailer #extraction3 #extraction2trailer #extraction3fullmovie2024 #extraction2prisonfight #extraction2fightscene #extractionreaction #extractionthemehelldivers2 #extractionfullmovie #extractionshootergames #extractionand #extractionandbonegraft #extractionandire #extractionandimmediateimplantplacement #extractionandimplantplacement #extractionandbonegraftrecovery #extractionandsocketpreservation #extractionandimplantsameday #extractionandimmediatedenture #extractionandimplant #extractionandfacial #extractionandrecrystallization #extractionandbridgesameday #extractionandbraces #extractionandfillingpump