1. **Swertia Chirayita (Chiraito):** Chiratin, amarogentin, swertiamarin, gentiopicroside, xanthones, and other bitter principles.
2. **Xanthoxylum armatum (Timur):** Essential oils (mainly limonene, linalool, and others), alkaloids (such as nitidine), flavonoids, and coumarins.
3. **Asparagus roce mosus (Kurilo):** Saponins (shatavarin), steroidal glycosides, flavonoids, alkaloids, and essential oils.
4. **Valeriana Jatamansi (Sugan dhawal):** Valeranone, valeranal, valerenic acid, lignans, and sesquiterpenes.
5. **Neopicrorhiza (Kutki):** Iridoid glycosides (including kutkoside), picrosides, andrographolide, and other bitter principles.
6. **Nardostachys Grandiflora (Jatamasi):** Valeranone, jatamansone, jatamansinol, calarenol, and other sesquiterpenoids.
7. **Cordyceps/Ophiocordyceps Sinensis (Yarshagumba):** Cordycepin, adenosine, polysaccharides, and various amino acids.
8. **Dactylorhiza Hatagirea (Panchaule):** Phenolic compounds, flavonoids, alkaloids, and other phytochemicals.
9. **Dendrobium sp. (Sunakhari):** Alkaloids, flavonoids, and other phytochemicals.
10. **Morchella Species (Guchi chyau):** Morchellin, hydrazine, and other compounds.
11. **Sinopodophyllum Hexandrum (Laghupatra):** Podophyllotoxin, alpha-peltatin, beta-peltatin, and other lignans.
12. **Hippophae Salicifolia (Dale chuk, vuichuk):** Carotenoids (such as beta-carotene), flavonoids, essential fatty acids (omega-3, omega-6), and vitamins (vitamin C and E).
13. **Urtica Dioca (Sisnoo):** Flavonoids (quercetin, rutin), phenolic compounds, vitamins, and minerals.
14. **Azadirachta indica (Neem):** Azadirachtin, nimbin, nimbidin, quercetin, and other bioactive compounds.
15. **Taxus Wallichiana (Lauth salla):** Taxanes (taxol, baccatin), flavonoids, and other phytochemicals.
16. **Paris polyphylla (Satuwa):** Steroidal saponins, triterpenoids, and other constituents.
17. **Rheum australe (Padam chal):** Anthraquinones (rhein, emodin), tannins, flavonoids, and phenolic compounds.
18. **Sapindus Mukorossi (Ritha):** Saponins (saponin A, B), flavonoids, and triterpenoids.
19. **Piper Longum (Pipla):** Piperine, piperlonguminine, pellitorine, and other alkaloids.
20. **Phyllanthus Emblica (Amala):** Vitamin C, tannins, flavonoids, and gallic acid.
1. **Nardostachys Grandiflora (Jatamasi):** Valeranone, jatamansone, jatamansinol, calarenol, and other sesquiterpenoids.
2. **Cordyceps/Ophiocordyceps Sinensis (Yarshagumba):** Cordycepin, adenosine, polysaccharides, and various amino acids.
3. **Dactylorhiza Hatagirea (Panchaule):** Phenolic compounds, flavonoids, alkaloids, and other phytochemicals.
4. **Dendrobium sp. (Sunakhari):** Alkaloids, flavonoids, and other phytochemicals.
5. **Morchella Species (Guchi chyau):** Morchellin, hydrazine, and other compounds.
6. **Sinopodophyllum Hexandrum (Laghupatra):** Podophyllotoxin, alpha-peltatin, beta-peltatin, and other lignans.
7. **Hippophae Salicifolia (Dale chuk, vuichuk):** Carotenoids (such as beta-carotene), flavonoids, essential fatty acids (omega-3, omega-6), and vitamins (vitamin C and E).
8. **Urtica Dioca (Sisnoo):** Flavonoids (quercetin, rutin), phenolic compounds, vitamins, and minerals.
These chemical constituents play a significant role in the medicinal and therapeutic properties of these plants. They are responsible for various biological activities and health benefits associated with the use of these plants in traditional and modern medicine.
TRIBHUVAN UNIVERSITY 2080 Bachelor Level (4 Yrs.)/Science & Tech./ III Year Research Methodology [R.M.305] (Compulsory) Time: 3 hrs. Full Marks: 100 New Course Candidates are required to give their answers in their own words as far as practicable. The questions are of equal value. 10x10=100 Attempt any TEN questions. Define research. Explain the chief characteristics of scientific research. Define research problem. Explain the ways of selecting a meaningful research problem. Also, describe the methods of problem identification. What are the methods of data collection for the purpose of research? Discuss the ways of data collection activity by schedule. Also, describe different types of schedules. What is sampling? Discuss the needs of sampling for research work. A statistics practitioner would like to estimate a population mean within 15 units. The confidence level has been set at 99% and population standard deviation = 174. Determine the sample size. What are the methods of redu...
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