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Questions and Answers
Which process involves the preparation of plant extracts using hot water extraction?
Which process involves the preparation of plant extracts using hot water extraction?
- Combining dried powder with acid
- Mixing with iodine solution
- Using a mechanical blender for grinding
- Adding distilled water to powdered plant material (correct)
What indicated the presence of carbohydrate after adding H2SO4 in the test?
What indicated the presence of carbohydrate after adding H2SO4 in the test?
- Production of gas bubbles
- Appearance of a violet ring (correct)
- Change in temperature of the solution
- Formation of a yellow ring
Which of the following plants was collected from Sonitpur and Dibrugarh districts for medicinal use?
Which of the following plants was collected from Sonitpur and Dibrugarh districts for medicinal use?
- Ricinus communis (correct)
- Aloe vera
- Ginger
- Lavender
What was the initial state of the plant materials before extraction?
What was the initial state of the plant materials before extraction?
Which method was used for grinding the plant materials after drying?
Which method was used for grinding the plant materials after drying?
What is the purpose of transferring the ground plant material into airtight containers?
What is the purpose of transferring the ground plant material into airtight containers?
Which of the following was specifically tested using an iodine solution?
Which of the following was specifically tested using an iodine solution?
What is the main step following the drying of plant materials for extraction?
What is the main step following the drying of plant materials for extraction?
Which method was used to determine the total phenolic contents in the plant extracts?
Which method was used to determine the total phenolic contents in the plant extracts?
What type of plant parts were analyzed from Ricinus communis in the study?
What type of plant parts were analyzed from Ricinus communis in the study?
Which of the following plants had the highest total flavonoid content?
Which of the following plants had the highest total flavonoid content?
What was the purpose of the study conducted on the seven medicinal plants?
What was the purpose of the study conducted on the seven medicinal plants?
Which solvent was NOT mentioned as being used for the organic solvent extraction?
Which solvent was NOT mentioned as being used for the organic solvent extraction?
What common secondary metabolites were detected in all of the plants tested?
What common secondary metabolites were detected in all of the plants tested?
Which plant showed the lowest total phenolic content, according to the findings?
Which plant showed the lowest total phenolic content, according to the findings?
What does the study suggest about the crude aqueous and organic solvent extracts of the tested plants?
What does the study suggest about the crude aqueous and organic solvent extracts of the tested plants?
What does the appearance of a violet colour in the Ninhydrin test suggest?
What does the appearance of a violet colour in the Ninhydrin test suggest?
Which test indicates the presence of reducing sugars when a brick red precipitate forms?
Which test indicates the presence of reducing sugars when a brick red precipitate forms?
In the Keller-Kilani test, what indicates the presence of cardiac glycosides?
In the Keller-Kilani test, what indicates the presence of cardiac glycosides?
What is the main indication of a reddish brown colour forming in Salkowski’s test?
What is the main indication of a reddish brown colour forming in Salkowski’s test?
Which reagent is involved in the Molisch's test for carbohydrate detection?
Which reagent is involved in the Molisch's test for carbohydrate detection?
What signifies the presence of glycosides in Liebermann’s test?
What signifies the presence of glycosides in Liebermann’s test?
Which of the following tests determines the presence of carbohydrates via a reddish brown precipitate?
Which of the following tests determines the presence of carbohydrates via a reddish brown precipitate?
What result would indicate the presence of saponins?
What result would indicate the presence of saponins?
What indicated the presence of carbohydrates in the water extract?
What indicated the presence of carbohydrates in the water extract?
Which solution was used to test for phenols and tannins?
Which solution was used to test for phenols and tannins?
What color change signifies the presence of flavonoids when using the Shinoda test?
What color change signifies the presence of flavonoids when using the Shinoda test?
What is indicated by the formation of an intense yellow color with NaOH in the alkaline reagent test?
What is indicated by the formation of an intense yellow color with NaOH in the alkaline reagent test?
What method was used for the crude extract preparation from powdered plant material?
What method was used for the crude extract preparation from powdered plant material?
What is the outcome when the crude extract reacts with Millon’s reagent?
What is the outcome when the crude extract reacts with Millon’s reagent?
In the test for saponins, what indicates a positive result?
In the test for saponins, what indicates a positive result?
How long was the crude extract heated continuously during the carbohydrate test?
How long was the crude extract heated continuously during the carbohydrate test?
What was used as the standard for measuring the steroid test?
What was used as the standard for measuring the steroid test?
What indicates the presence of steroids in the chloroform test?
What indicates the presence of steroids in the chloroform test?
Which method was utilized to determine the flavonoid content?
Which method was utilized to determine the flavonoid content?
What indicates the presence of terpenoids in the chloroform test?
What indicates the presence of terpenoids in the chloroform test?
How were the results for both steroids and terpenoids expressed?
How were the results for both steroids and terpenoids expressed?
What was the incubation period for the flavonoid content test?
What was the incubation period for the flavonoid content test?
Which wavelength was used to measure the steroid test results?
Which wavelength was used to measure the steroid test results?
What was included in the flavonoid content test besides the plant extract?
What was included in the flavonoid content test besides the plant extract?
Study Notes
Medicinal plants analysis
- The study aimed to investigate the presence of phytochemicals and measure total phenolic and flavonoid content in seven medicinal plants from Northeast India.
- Plant material selection included Bryophyllum pinnatum, Ipomea aquatica, Oldenlandia corymbosa, Ricinus communis, Terminalia bellerica, Tinospora cordifolia, and Xanthium strumarium.
- The plants were dried, ground into powder, and extracted with water, methanol, ethanol, and acetone for further analysis.
- The study used different methods to determine the presence of specific phytochemicals, including proteins, carbohydrates, phenols, tannins, flavonoids, saponins, glycosides, steroids, and terpenoids.
Phytochemicals Identified
- All seven plants exhibited a positive test for proteins, carbohydrates, phenols, tannins, flavonoids, and saponins.
- The study did not specify which glycosides or steroids, just indicated their presence within each plant.
- Each plant showed variability in its phytochemical concentration.
Phenolic Content
- The highest total phenolic content was found in the aqueous extract of Xanthium strumarium, followed by Tinospora cordifolia stem, Ricinus communis roots, and Terminalia bellerica leaves.
- The lowest phenolic content was found in Oldenlandia corymbosa.
Flavonoid Content
- The highest total flavonoid content was found in the aqueous extract of Ipomea aquatica, followed by Terminalia bellerica, Tinospora cordifolia leaves, and Xanthium strumarium.
- The lowest flavonoid content was found in Oldenlandia corymbosa and Tinospora cordifolia stem.
Conclusion
- The study concluded that the tested plants contain medically important bioactive compounds, supporting their traditional uses in medicine.
- The findings highlight the potential of these plants for further research on pharmaceutical applications.
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Description
This quiz explores the analysis of phytochemicals in seven medicinal plants from Northeast India. It covers plant selection, extraction methods, and the identification of various phytochemicals such as flavonoids and phenols. Test your knowledge on the medicinal properties and chemical content of these plants.
