Herbal Extract Preparation
Herbal Extract Preparation - Related Videos
08:07
Preparation of Herbal Medicine: Er-Xian Decoction and Er-Xian-containing Serum for In Vivo and In Vitro Experiments
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Cited by 6 •
2017
Here, we present the preparation of an er-xian decoction (EXD) in four steps—soaking, decoction, filtration, and concentration—and demonstrate the administration of a prepared EXD-containing serum to rats. These methods are applicable to the in vivo and in vitro study of herbal decoctions such as traditional Chinese medicines.
07:34
Use of Animal Model of Sepsis to Evaluate Novel Herbal Therapies
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Cited by 13 •
2012
Sepsis refers to a systemic inflammatory response syndrome resulting from a microbial infection, and can be simulated by a surgical technique termed cecal ligation and puncture (CLP). Here we describe a method to use CLP-induced animal model to screen medicinal herbs for therapeutic agents.
07:45
Preparation and Fractionation of Xenopus laevis Egg Extracts
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Cited by 7 •
2008
Crude and fractionated Xenopus egg extracts can be used to provide ingredients for reconstituting cellular processes for morphological and biochemical analysis. Egg lysis and differential centrifugation are used to prepare the crude extract which in turn in used to prepare fractionated extracts and light membrane preparations.
03:58
Preparation of Crude Cell Extract from Vibrio natriegens
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2025
Source: Wiegand, D. J., et al. Cell-free Protein Expression Using the Rapidly Growing Bacterium Vibrio natriegens. J. Vis. Exp. (2019).This video demonstrates the preparation of a cell extract from Vibrio natriegens, a rapidly growing bacterium known for its high protein synthesis rate. The bacterial pellet is washed and resuspended in lysis buffer before sonication on ice to prevent cellular degradation. The lysate is centrifuged to separate insoluble cell debris, and the cell extract is...
09:16
Medium-scale Preparation of Drosophila Embryo Extracts for Proteomic Experiments
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Cited by 4 •
2017
The goal of this protocol is to provide a straightforward and inexpensive approach to collecting Drosophila embryos at medium scale (0.5-1 g) and preparing protein extracts that can be used in downstream proteomic applications, such as affinity purification-mass spectrometry (AP-MS).
FAQs
Solvent choice determines which plant constituents can dissolve and therefore which compounds enter the extract. Water and ethanol are examples of solvents used for this purpose, but the resulting chemical profile depends on the plant material and preparation conditions. Selecting a solvent deliberately helps researchers investigate particular phytochemicals and compare extracts produced under controlled conditions.
These methods provide different ways to contact plant material with a solvent. Maceration, infusion, and percolation rely on distinct handling approaches, while heating adds temperature as a preparation condition. Because method and conditions affect the transfer of soluble compounds, documenting them is essential when comparing extract composition or relating preparation choices to biological outcomes.
Plant identity and preparation records provide the context needed to interpret an extract's chemical and biological results. After processing, filtration, concentration, drying, and standardized storage can help improve consistency and preserve chemical activity. Careful documentation connects the source material and handling conditions with the properties observed in research or formulation work.
A typical workflow begins with selecting and processing the plant material, followed by choosing a solvent and extraction method. The resulting liquid is then filtered and may be concentrated or dried before standardized storage. Recording each stage, including the method and conditions used, supports reproducibility and helps investigators relate the final extract to its source.
Medical researchers use prepared extracts to investigate phytochemicals, evaluate potential therapeutic effects, develop dosage approaches, and establish quality-control procedures. The extract provides a defined preparation for relating plant material and processing conditions to biological observations. This makes preparation records important when comparing samples or assessing whether differences in outcomes may reflect differences in extraction.
A well-documented extract can link plant identity, solvent choice, extraction method, processing steps, and storage conditions with the material tested. That connection supports interpretation of chemical activity, comparison between preparations, and assessment of biological outcomes. In medicine, such information also contributes to quality control and to more consistent investigation of potential therapeutic effects.