scholarly journals THE EFFECT OF MALACCA LEAVES (Phyllantus emblica) ETHANOLIC EXTRACT ON Plasmodium falciparum GROWTH IN VITRO

2018 ◽  
Vol 12 (4) ◽  
Author(s):  
Nuzul Asmilia ◽  
T Armansyah TR ◽  
Dwinna Aliza ◽  
Juli Melia ◽  
Erdiansyah Rahmi ◽  
...  
Keyword(s):  
Plasmodium Falciparum ◽  
Ethanolic Extract ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Probit Analysis ◽  
Antiplasmodial Activity ◽  
Control Group ◽  
Ic50 Value

The aim of this research was to find out in vitro antiplasmodium activity of Malacca leaves (Phyllantus emblica) ethanolic extract against Plasmodium falciparum growth. In this study, Plasmodium culture contained 5% parasitemia in ring stage was cultured using candle jar method and antiplasmodial activity test was carried out using microculture. The treatments were divided into 7 groups with four repetitions. K1 as negative control group was given Roswell Park Memorial Institute (RPMI), while K2 as positive control group was given artesdiaquine. Groups K3, K4, K5, K6, and K7 group was added with 100 µg/mL, 75 µg/mL, 50 µg/mL, 25 µg/mL, and 5 µg/mL of Malacca leaves ethanolic extract, respectively. Antiplasmodial activity was determined by inhibition concentration of 50% parasite growth (IC50). The data were analyzed using ANOVA and followed by Duncan test. The average of parasitemia level in group K1, K2, K3, K4, K5, K6, and K7 were 55.25±15.62, 8.50±2.52, 8.50±3.00, 9.25±0.95, 9.00±2.70, 9.79±2.06, and 10.75±2.22, respectively. The average of inhibition percentage in group K1, K2; K3; K4; K5; K6; and K7 were 0.00±0.00%, 84.62±4.55%; 84.62±5.43%; 83.26±1.73%; 83.71±4,90%; 82.35±3,73%; and 80.54±6.83%, respectively (P0.01). The results showed that the administration of malacca leaves ethanolic extract significantly affect (P0.01) the inhibition of Plasmodium growth as compared to group K1 (negative control). Probit analysis reveals the IC50 value was 3.889 µg/mL. In conclusion, all doses of malacca leaves ethanolic extract used in this study was able to inhibit Plasmodium falciparum growth with IC50 value was 3.889 µg/mL.

scholarly journals ASSESSMENT OF ANTI-INFLAMMATORY ACTIVITY OF ETHANOLIC EXTRACT OF ASAM KANDIS (GARCINIA XANTHOCHYMUS HOOK. F. EX T. ANDERSON) FRUIT

2018 ◽  
Vol 11 (4) ◽  
pp. 81
Author(s):  
Hanafis Sastra Winata ◽  
Rosidah Rosidah ◽  
Panal Sitorus
Keyword(s):  
Ethanolic Extract ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Inflammatory Activity ◽  
Control Group ◽  
Phytochemical Screening ◽  
Fruit Extract ◽  
Garcinia Xanthochymus ◽  
Anti Inflammatory

 Objective: The objective of this study was to evaluate the anti-inflammatory activity in acute and subacute models of inflammation from ethanolic fruit extract of Asam kandis (Garcinia xanthochymus Hook. f. ex T. Anderson) in animal (rats) models.Methods: Pleliminary phytochemical screening was carried out by using standard procedures.. Assessment of acute and subacute models of inflammation was using carrageenan-induced paw edema method and cotton pellet granuloma method using three dosage treatments; 200 mg/kg BW, 400 mg/kg BW, and 800 mg/kg BW along with a negative control group (0.5% Na CMC) and positive control (Na diclofenac 2.25 mg/kg BW). The inhibition period was observed at 30, 60, 90, 120, 150, and 180 min time intervals.Result: The phytochemical screening showed that the ethanolic fruit extract from Asam kandis contain contains flavonoids, glycosides, steroids, and triterpenoids. The anti-inflammatory result showed that the strongest inhibition produced by ethanolic fruit extract of Asam kandis occurred on the dosage of 800 mg/kg BW compared to the other doses (200 and 400 mg/kg BW) throughout the observation period.Conclusion: This finding indicated that ethanolic fruit extract of Asam kandis (G. xanthochymus Hook. f. ex T. Anderson) might become an interesting candidate for treatment of inflammation.

scholarly journals Silver Nanoparticle of Acalypha indica Linn. Leaf As Bio-larvicide against Anopheles sp. Larvae

2021 ◽  
Vol 9 (A) ◽  
pp. 760-765
Author(s):  
Yos Banne ◽  
Olfie Sahelangi ◽  
Steven Soenjono ◽  
Elisabeth Natalia Barung ◽  
Selfie Ulaen ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Silver Nanoparticle ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Probit Analysis ◽  
Control Group ◽  
Distilled Water ◽  
Lc50 Value ◽  
Acalypha Indica

BACKGROUND: Acalypha indica Linn. has been used as traditional medicine, it contains flavonoids, alkaloids, tannins, saponins, steroids, triterpenoids, and essential oils. AIM: This study aimed to determine the bio-larvicide effects of A. indica Linn. leaf stew and the silver nanoparticles against Anopheles sp. larvae. METHODS: The fresh leaves of A. indica Linn. extracted using distilled water at 100°C for 30 min. The silver nanoparticles were made by mixing a solution of silver nitrate with the stew, which acts as a reducing agent. The resulting silver nanoparticles were characterized by particle size analyzer and UV-vis spectrophotometer. The bio-larvicide effects against Anopheles sp. larvae performed using a completely randomized design. There were eight groups consisted of ten larvae and three replications. Treatment groups of stew and silver nanoparticle for concentrations 0.05%, 0.5%, and 5%, respectively. The negative control group was distilled water and the positive control group was the 0.01% abate solution. Assessment of larvicide activity was carried out every hour for 6 h and continued if there were larvae that live up to 24 h. The LC50 value was calculated based on Probit analysis. RESULTS: The results showed that the A. indica Linn. leaf stew can be made into silver nanoparticles preparations, optimal results were obtained from a mixture of 1% stew and 3 mM AgNO3. The result of bio-larvicides effect test against Anopheles sp. larvae showed that the LC50 value of the A. indica Linn. leaf stew was 727,3 ppm and the LC50 value of silver nanoparticles was 3.366 ppm. CONCLUSION: It can be concluded that A. indica Linn. is a promising larvicidal plant and can be made into silver nanoparticle preparations.

scholarly journals ANTI-TRYPANOSOMA ACTIVITY OF ETHANOLIC EXTRACT OF NEEM LEAF (Azadirachta indica) ON Trypanosoma evansi IN RATS (Rattus norvegicus)

2017 ◽  
Vol 11 (1) ◽  
pp. 27-30
Author(s):  
Yudha Fahrimal ◽  
Siti Maghfirah ◽  
Rinidar Rinidar ◽  
Al Azhar ◽  
Nuzul Asmilia ◽  
...  
Keyword(s):  
Azadirachta Indica ◽  
Leaf Extract ◽  
Ethanolic Extract ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Trypanosoma Evansi ◽  
Male Rats ◽  
Control Group ◽  
Neem Leaf Extract

The aim of this study was to determine the effect of neem leaf extract (Azadirachta indica) on parasitemia of rats infected with Trypanosoma evansi (T. evansi) Aceh local isolate. A total of 24 male rats aged three months were used in this study and randomly divided into six treatment groups equally. The negative control group (K0) without T. evansi infection and neem leaf extract, the positive control group (K1) was infected with T. evansi but no neem leaf extract given, group K2, K3, K4, and K5 were infected with 5x104 T. evansi and were given neem leaf extract after patent infection with dose of 50, 100, 400, and 800 mg/kg BW respectively. The extract was given orally for three consecutive days. On the fourth day, rat blood was drawn for parasitemia examination. The results showed that no T. evansi detected in rats in negative control group (K0), while parasitemia in group K1; K2; K3; K4; and K5 was 12,295 x106/mL; 10,495 x106/mL; 9,360 x106/mL; 5,080x106/mL; and 2,398x106/mL of blood, respectively. Percentage of inhibition of parasitemia in K2, K3, K4, and K5 reached 14.64, 23.78, 58.68, and 80.50%, respectively. Based on the result of the study, neem leaf extract of 800 mg/kg BW gave the highest reduction of parasitemia in rats infected with T. evansi.

scholarly journals Potential of Cocoa Extract (Theobroma cacao) in Inhibiting Erythrocyte Damage Induced by Physalia utriculus Venom

2020 ◽  
Vol 6 (3) ◽  
pp. 157
Author(s):  
Adinningtyas Intansari ◽  
Al Munawir ◽  
Laksmi Indreswari
Keyword(s):  
Theobroma Cacao ◽  
Ethanol Extract ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Control Group ◽  
Marine Biota ◽  
Erythrocyte Lysis ◽  
Theobroma Cacao L

Physalia utriculus is one of the invertebrate marine biota that is often found in Indonesia. Some symptoms of venoming due to jellyfish stings cause pain, itching, and hemolysis. In Indonesia, 13 cases of jellyfish stings were reported in 2005-2009 with three people dying in Java, Bali, and Bangka. Cocoa beans (Theobroma cacao L.) contain fat, carbohydrates, proteins, and polyphenol compounds that are useful as antioxidants. Polyphenols in the form of epicathechins, catechins, and procyanidins serve to provide protection to hemolysis. The purpose of this study was to determine the potential of ethanol extract of cacao (Theobroma cacao L.) in inhibiting the damage of erythrocyte induced by Physalia utriculus in vitro. This study used 28 samples of erythrocytes divided into seven groups, namely the normal control group, negative controls, and treatment with cocoa ethanol extract 0.2%, 0.1%, 0.04%, and 0.02%. Each subsequent group induced venom Physalia utriculus. The results showed that the average speed of erythrocyte lysis in the treatment group by giving cocoa ethanol extract 0.2%, 0.1%, 0.04%, and 0.02% respectively (seconds ± standard deviation) was 858,25 ± 94,44; 1.000,5 ± 159,93; 678,5 ± 19,71; and 1.006 ± 159,50. The mean speed of erythrocyte lysis in the negative control group was 1,025 ± 164.63 and the positive control group with the administration of N-Acetylcystein can last up to one hour after administration of venoms. Test for normality and homogeneity shows that data is normally distributed and homogeneous. One Way Annova analysis shows the significance value of p <0.05, then a post hoc analysis test was performed with the Bonferoni method to find out the differences in significance in each group. In this study it can be concluded that the administration of cocoa ethanol extract has no potential to inhibit erythrocyte damage that has been venomed by Physalia utriculus in vitro. Keywords: Physalia utriculus, cacao, erythrocyte damage

scholarly journals Ameliorative Effect of Ethanolic Extract of Petroselinum Crispum Against Gentamicin-Induced Nephrotoxicity in Rabbits Male

2020 ◽  
Vol 13 (2) ◽  
Author(s):  
Sarah Hussain ◽  
Mariam Kadhem
Keyword(s):  
Body Weight ◽  
Clinical Signs ◽  
Ethanolic Extract ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
The Body ◽  
Positive Control Group ◽  
Control Group ◽  
Petroselinum Crispum

The experiment was conducted to investigate the protective effect of Petroselinum crispum leave extracted against gentamicin-induced nephrotoxicity in male rabbits by studying the body weight, clinical signs, haematological and biochemical parameters, gross lesion and histopathological changes. Twenty four rabbits male were used and divided into 4 groups. Group 1: rabbits served as a negative control, received distilled water 1 ml(orally). Group 2: rabbits served as a positive control group, received gentamicin at a dose of 80 mg/kg/day intramuscular for 15 days. Group 3: rabbits received gentamicin at a dose of 80 mg/kg/day then after one hour treated with ethanolic extract of Petroselinum crispum at dose 125 mg/kg orally for 15 days. Group 4: rabbits received gentamicin at a dose of 80 mg/kg/day then after one hour treated with ethanolic extract of Petroselinum crispum at dose 250 mg/kg orally for 15 days.The results of the gentamicin treated group( positive control group) showed clinical signs such as loss of body weight, loss of appetite and rough hair with hematuria. The body weight a significantly declined (p≤ 0.05) compared other groups. There was a significant decrease (p≤ 0.05) in WBC count, lymphocyte, GSH, SOD, CAT, and GPX levels, while it recorded a significant increase (p≤0.05) in weights of the kidneys, neutrophils, creatinine, urea, and MDA. Histological studies showed several kidney pathological changes such as pale colour, enlargement in size and weight and easy from detaching as opposed to negative control group. On the other hand, the group treated with ethanolic extractof Petroselinum crispum at dose 125 mg/kg induced improved of parameters as recorded significant increased(P ≤ 0.05) in body weight, WBC count, lymphocyte, GSH, SOD, CAT, and GPX, while significant decreased (P ≤ 0.05) in weights of the kidneys, neutrophils, creatinine, urea, and MDA compared with the positive control group whereas rabbits treated with ethanolic extract of Petroselinum crispum at dose 250 mg/kg restored the parameters and histological changes of the kidney to near normal status compared with the negative control group. These results showed that the dose-detected Petroselinum crispum extract (250mg / kg) acts as potential curative effect against gentamicin-induced nephrotoxicity in male rabbits.

scholarly journals Spectrophotometric Analysis Evaluating Apical Microleakage in Retrograde Filling using GIC, MTA and Biodentine: An in-vitro study

2020 ◽  
Author(s):  
Manisha Nepal ◽  
Snigdha Shubham ◽  
Rupam Tripathi ◽  
Jwolan Khadka ◽  
Deepa Kunwar ◽  
...  
Keyword(s):  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Control Group ◽  
Filling Materials ◽  
Diamond Bur ◽  
Retrograde Filling ◽  
Significant Difference ◽  
Supernatant Solution

Abstract Background The present study compares the apical microleakage of three different root-end filling materials in which the retrograde cavity is prepared by two different burs. Methods Eighty extracted single rooted maxillary and mandibular premolars were taken. Root canal treatment was completed. Apical 3 mm of all the teeth were resected with diamond disk. The tooth were divided into four groups with two subgroups for each group containing 10 tooth (N= 10) as: Group IA (Negative Control and IB (Positive Control); Group IIA and IIB: Prepared with round carbide bur and round diamond bur respectively, filled with GIC; Group IIIA and IIIB: Prepared with round carbide bur and round diamond bur respectively, filled with MTA; Group IVA and IVB: Prepared with round carbide bur and round diamond bur, filled with Biodentine. After applying two coats of nail varnish leaving apical 3 mm (except for negative control group) all teeth were immersed in 2% methylene blue for 3 days and again in 65% nitric acid for next 3 days for extraction of dye. The obtained solution was then transferred to eppendorf tube and centrifuged in microcentrifuges at 14,000 revolution per minutes (RPM) for 5 minutes. Optical density or absorbance of the supernatant solution was measured with UV spectrophotometer at 550 nm. Results The absorbance of the supernatant solution after dye extraction is decreasing in the order of positive control> GIC> MTA> Biodentine> negative control group. The significant difference was observed between GIC and MTA (p=0.0001) and GIC and Biodentine (p=0.0001) with two different burs but statistically non-significant difference was observed between MTA and Biodentine with Carbide bur (p=0.127) and Diamond bur (p=0.496) respectively. Conclusions Within the limitations of the present study, it can be concluded that Biodentine and MTA showed less microleakage as compared to GIC. There is no significant difference between mean microleakage of MTA and Biodentine. However, the mean OD of the Biodentine was least of all evaluated materials. Preparation of the root-end using round carbide bur as well as round diamond burs showed comparable microleakage for all three filling materials.

In vitro Efficacy of Experimental Chitosan-Containing Solutions as Anti-Erosive Agents in Enamel

2016 ◽  
Vol 50 (3) ◽  
pp. 337-345 ◽  
Author(s):  
N.I.P. Pini ◽  
D.A.N.L. Lima ◽  
J.R. Lovadino ◽  
C. Ganss ◽  
N. Schlueter
Keyword(s):  
Negative Control Group ◽  
High Viscosity ◽  
Positive Control ◽  
Negative Control ◽  
Sem Analysis ◽  
The Other ◽  
Tissue Loss ◽  
Control Group ◽  
Lower Viscosity

The present study evaluated the effect of chitosans with different viscosities, dissolved in an AmF/SnCl2 solution, against erosion or erosion/abrasion. A total of 192 specimens were assigned to 2 × 6 groups (n = 16 specimens each): negative control, 4 chitosan solutions (groups Ch50, Ch500, Ch1000, and Ch2000, with viscosity of 50, 500, 1,000, or 2,000 mPas, respectively, 0.5% chitosan, 500 ppm F-, 800 ppm Sn2+, pH 4.4), and positive control (500 ppm F-, 800 ppm Sn2+, pH 4.3). One half of the groups was demineralized (experiment 1, E1; 10 days, 6 × 2 min/day, 0.5% citric acid, pH 2.8) and exposed to solutions (2 × 2 min/day); the other half was additionally brushed (15 s, 200 g) with non-fluoridated toothpaste before solution immersion (experiment 2, E2). Treatment effects were investigated by profilometry, energy-dispersive X-ray spectroscopy and scanning electron microscopy (SEM). In E1, all the chitosan-containing solutions reduced enamel loss by 77-80%, to the same extent as the positive control, except for Ch2000 (p ≤ 0.05), which completely inhibited tissue loss by the formation of precipitates. In E2, Ch50 and Ch500 showed best performance, with approximately 60% reduction of tissue loss compared to the negative control group (p ≤ 0.05 compared to other groups). SEM analysis showed differences between negative control and the other groups but only minor differences amongst the groups treated with active agents. In both E1 and E2, treatment with active agents resulted in surface enrichment of carbon and tin compared to negative control (p ≤ 0.001); brushing removed parts of carbon and tin (p ≤ 0.001). Chitosan shows different properties under erosive and erosive/abrasive conditions. Under erosive conditions high viscosity might be helpful, whereas lower viscosity seems to be more effective in cases of chemo-mechanical challenges.

scholarly journals Effect of Basil Leaves (Ocimum sanctum L.) Infusion as Hepatoprotective Agent Induced by Paracetamol

2017 ◽  
Vol 7 (2) ◽  
pp. 68
Author(s):  
Ni Nyoman Yuliani ◽  
Jefrin Sambara ◽  
Maria Hilaria ◽  
Harlinda Harlinda
Keyword(s):  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Ocimum Sanctum ◽  
Control Group ◽  
Treatment Groups ◽  
Dose Infusion ◽  
High Antioxidant Activity ◽  
Test Result

Indonesia has  biodiversity potential to be developed as medicinal plants, such as basil leaves (Ocimum sanctum L.). Basil was reported to have a very high antioxidant activity in vitro. The aim of this study was to determine the effect of basil leaves (Ocimum sanctum L.) infusion to liver based Aspartate Aminotransferase (AST) and Alanine Aminotransferase (ALT) value in each dose. 18 rats were divided into 6 groups.,  control group,  negative control group treated with CMC Na 0.5%,  positive control group treated with Curcuma 3.6 mg / 200gBB, groups of 4-6 consecutive given a 80 mg  dose infusion basil / 200 gBB, 160 mg / 200 gBB, 320 mg / 200 gBB for 8 consecutive days, on the day of the 4th and 8th all treatment groups induced by toxic doses of paracetamol (500 mg / 200 gBB) except the normal control group 1, The research data in the form of enzyme activity of AST and ALT were analyzed using parametric and nonparametric ANOVA, and Friedman test with the level of trust  then followed by SNK test and Bnj test. The statistical test result with a 95% of level of trust that shown basil infuse with a dose of 80mg / 200gBB, 160mg / 200gBB, 320mg / 200gBB have hepatoprotective effects in rats induced by paracetamol 500mg / 200gBB. Based on the result of changes in average levels of AST on the fourth day and the eighth day of the three treatment infusion, infusion at a dose of 160 mg / 200gBB most effectively reduce average levels of AST and a group that has the average AST closest to the control group is positive, but infusion at a dose of 320mg / 200gBB the group that has the closest average ALT positive control group.Keywords : hepatoprotective, Ocimum sanctum L, Paracetamol

scholarly journals Immunomodulator Activity of Effervescent Granule of Wualae Fruit (Etlingera elatior (Jack) R.M. Smith) Based on Specific Phagocytic Activity

2019 ◽  
Vol 2 (2) ◽  
pp. 35-40 ◽  
Author(s):  
Adryan Fristiohady ◽  
Wa Ode Siti Zubaydah ◽  
Wahyuni Wahyuni ◽  
Mirda Mirda ◽  
Saripuddin Saripuddin ◽  
...  
Keyword(s):  
Phagocytic Activity ◽  
Ethanolic Extract ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Group Iv ◽  
Control Group ◽  
Group Iii ◽  
Group I ◽  
Etlingera Elatior

The previous study reported that Etlingera elatior (Wualae) has activity as immunostimulant with dose at 300 mg/kg BW and 400 mg/kg BW. Formulating natural product into effervescent granule (GE) can increase practicality and interest to consume traditional medicine. This study aims to investigate the immunostimulant activity of Wualae ethanolic extract in the effervescent granule. Wualae was macerated with ethanol then formulated into effervescent granule at dose 300 mg/kgBW and 400 mg/kgBW. Formulations were evaluated. Animals were divided into 4 groups and treated with: group I (positive control); group II (negative control); group III (GE dose at 300mg/kgBW); and group IV (GE at dose 400mg/kgBW) for 7 days and at days 8, groups were infected by Staphylococcus aureus intraperitoneally. Immunostimulant activity was measured by calculating the Specific Phagocytic Activity (SPA) of macrophage. Data collected from the evaluation and measurement of the SPA then analyzed using SPSS. Results from the evaluation were considered good except the moisture content of effervescent granule. Results from SPA was found that effervescent granule at dose 300 mg/kgBW and at dose 400 mg/kgBW have 26.33% and 32.5% consecutively with significance 0.02 (p<0.05). Thus, effervescent granule has comparable phagocytosis activity with positive control.

scholarly journals In Vivo Antiplasmodial Activity of Entandrophragma cylindricum (Sprague) Sprague Ethyl Acetate Extract in Plasmodium berghei-Infected Mice

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Noumedem Anangmo Christelle Nadia ◽  
Yamssi Cédric ◽  
Ngongang Ouankou Christian ◽  
Simeni Njonnou Sylvain Raoul ◽  
Yondo Jeanette ◽  
...  
Keyword(s):  
Plasmodium Falciparum ◽  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
Plasmodium Species ◽  
Negative Control Group ◽  
Stem Bark ◽  
Negative Control ◽  
Antiplasmodial Activity ◽  
Control Group

Background. One of the most dangerous Plasmodium species is Plasmodium falciparum. Hence, it causes a higher rate of mortality. The resistance of Plasmodium falciparum to the ACT (Artemisinin-based Combination Therapies) has led to the search for new antimalarial drugs. The purpose of this research was to assess the in vivo antiplasmodial activity of Entandrophragma cylindricum ethyl acetate extract to provide a scientific basis for the use of this medicinal plant to treat malaria. Methods. Entandrophragma cylindricum stem bark powder was macerated in ethyl acetate to obtain the extract. The extract liquid filtrate was concentrated, evaporated and dry using a Rotavapor. The Peter and Rane test were used for the suppressive and curative antiplasmodial activities at different doses (125, 250 and 500 mg/kg). A positive and negative control groups were administered chloroquine (5 mg/kg) and 10% hypromelose, respectively. To assess the parasitemia of the mice a thin blood smear was made. Results. The ethyl acetate extract completely (100%) inhibited the development of P. berghei in the suppressive test at the dose of 500 mg/kg while that of the curative test was inhibited at 95%. The extract-treated group (500 mg/kg) and (Chloroquine (5 mg/kg) group all survived. The negative control group recorded a 100% mortality rate. Conclusion. The present study provides scientific confirmation on the use of E. cylindricum stem bark as an antiplasmodial remedy. However, the identification of the mode of action and the purification of the active compounds are necessary for further studies.

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