Mikania micrantha leaves were dried at room temperature and smashed manually. Each sample was extracted by maceration method with ethanol 96% at room temperature for 5 x 24 h. The liquid extract obtained was then evaporated with a rotary ABSTRACT Background: Mikania micrantha is a great plant that has been used as raw material for traditional medicines. Objective: This paper aims to evaluate total phenols, total flavonoids, and phytochemical screening by FTIR spectroscopy of standardized extract of Mikania micrantha leaf to confirm its medicinal values. Materials and Methods: The leaves were extracted by maceration method using ethanol 96% and evaporated by rotary evaporator. The determination of total phenolic and total flavonoid were performed by spectroscopic method. The phytochemical constituent was screened through the bioactive group of the chemical by FTIR analysis. Results: The total phenolic of extract of Mikania micrantha leaf ranged from 13.19±0.74 to 34.24±1.24 mg gallic acid equivalent/g and total flavonoid ranged from 1.11±0.11 to 20.63±0.16 mg quercetin/g. FTIR analysis confirmed the presence of O-H, aliphatic CH, and C=O functional group. Conclusion: the result of this study confirm that Mikania micrantha possesses the potential of bioactive compounds which are responsible for the biological activities that are useful for raw material of traditional medicines.

BACKGROUND: CMC is one of the water-soluble polysaccharide derivatives obtained from cellulose. Alkalization and carboxymethylation process will influence the quality of the CMC. The use of a combination of mixed solvents and varying alkali concentrations in the synthesis process of CMC needs to be studied so that CMC can be synthesized with the proper characteristics. AIM: This study was conducted to determine the characteristics of carboxymethyl cellulose synthesized using various solvents and NaOH concentrations. METHODS: Carboxymethyl cellulose (CMC) was synthesized using solvent mixture, namely isopropanol: isobutanol (30: 70) and isopropanol:ethanol (50: 50) with varied concentration of NaOH of 5%, 10%, 15%, 20%, 25%, respectively. Synthesized CMC was characterized by an organoleptic test, pH, infrared analysis, and degree of substitution (DS). RESULTS: The result showed that characteristics of synthesized CMC were different from one another. The organoleptic test showed that synthesized CMC uses isopropanol: isobutanol (30: 70) was coarse powder, odourless and tasteless, ivory until burlywood along with increasing NaOH concentration; while the synthesized CMC with isopropanol: ethanol (50: 50) was a colourless, odourless, tasteless and fine powder. The pH of synthesized CMC was neutral. Infrared profile of synthesized CMC indicated the existence of carboxyl functional groups in 1600-1640 cm-1 region. The degree of substitution value of formula II-5, II-10, II-15, II-20, II-25, IE-5, IE-10, IE-15, IE-20, and IE-25 were 0.885;0.757; 0.685; 0.592; 0.575; 0.611; 0.906; 0.603; 0.671; 0.751, respectively. CONCLUSION:  Characteristics of CMC vary depending on the type of solvent mixture and NaOH concentrations used in synthesis. The more polarity of a solvent mixture the more colourless and higher DS value of synthesized CMC. On the other hand, the more alkali concentration in synthesis CMC the more colour and higher DS value was acquired.

BACKGROUND: North Sumatra is one of the regions in Indonesia that produce bananas. Banana stems and peels contain cellulose and it can be isolated in nanofiber form. Carboxymethylcellulose is a cellulose derivative that undergoes an alkalization and etherification process AIM: This research was conducted to evaluate the alkalization effect on synthesis of carboxymethyl cellulose from stem and peel cellulose of banana. METHODS: Stem and peel of banana was extracted with NaOH 17.5% and the extract was synthesized to carboxymethyl cellulose (CMC). The synthesis of CMC was beginning with alkalization process in variation of NaOH concentration and the reaction was then etherificated with sodium monochloroacetate. CMC was characterized by FTIR and DS values ​​were determined. RESULTS: FTIR spectra of synthesized CMC had different pattern compared to cellulose. It showed that an etherification reaction had been occurred in the cellulose compound. Spectra of CMC with variation in alkali concentration was not much different from one another. The synthesized CMC from stem and peel cellulose of banana had different degree of substitution (DS) values ​​due to variate concentration of NaOH in alkalization. CONCLUSION: Alkalization on CMC synthesis affects the DS value of synthesized CMC. The increase DS value is proportional to the rise in NaOH concentration even though there is a boundary concentration to obtain the optimum DS value.

Objective: The study was aimed to investigate the inhibitory effect of ethanolic extract of Curanga fel-terrae leaves (EECFL) against acetylcholine (ACh)-induced contraction of the ACh-muscarinic-3 receptor. Materials and Methods:The study of the inhibitory effect of the ethanolic extract on the contraction by ACh concentration series (10 −8 -10 −3 M) was conducted in vitro using isolated guinea pig tracheal organ in the Krebs solution.Results: Early incubation of tracheal organ with EECFL (0.5, 1, 2 and 4 mg/ml) before contracted by the series of ACh concentration produces the decrease of ACh contraction. The concentration series of ACh sigmoid curve rightward shift without decreasing the maximal contraction. The results of double-reciprocal plot of ACh shows the mean value of the 1/y-intercept of each extract was not different with the control. Conclusion:The EECFL showed competitive antagonist effect on ACh-muscarinic-3 receptors.

Abstract. Batubara R, Hanum TI, Affandi O, Wahyuni HS. 2020. Chemical compounds contained in young and mature leaves of agarwood species Wikstroemia tenuiramis and its antioxidant properties. Biodiversitas 21: 4616-4622. The genus Wikstroemia is one of the genus of agarwood producing trees which has not been widely researched and published. One type of this genus is Wikstroemia tenuiramis Miq, which grows naturally in North Sumatra, the leaves are like other types of agarwood leaves can be used as raw material for agarwood leaves tea. A research has been conducted to determine the chemical contents contained in the young and mature leaves of agarwood plants species W. Tenuiramis. This research methods applied qualitative analysis using phytochemical screening, quantitative analysis to determine tannin content using titration method, antioxidant activity analysis using 2,2-diphenil-1-picrylhydrazil (DPPH) method, and compound tracing using Py-gas chromatography-mass spectrometry (Py-GC-MS) instruments. The qualitative phytochemical analysis results showed no difference in chemical compounds contained in both the young and mature leaves. Both the young and mature leaves contained flavonoids, triterpenoids, and tannins, and did not contain alkaloids, steroids and saponins. The young contained tannins of 1.079 ± 0.001% and the mature contained tannins of 4.645 ± 0.021%, not significant statistically. Py-GC-MS analysis showed the presence of various 30 bioactive compounds contained in both young and mature leaves. The analysis results also showed that both the young and mature leaves had very strong antioxidant activity. Our findings suggest that the two types of leaves have equal utility value of in term of chemical contents and antioxidant potentials.