Research List

No.	Researcher	Title	Abstract	Year
2101	Myint Myint Khin	INVESTIGATION OF BIOACTIVE SUBSTANCES CONTENTS AND IN VITRO FREE RADICAL SCAVENGING ACTIVITY OF MICHELIA CHAMPACA L. (SAGAWA) FLOWER	The objective of this study was to examine the yield percent of organic solvent extractable matter, the content of bioactive substances (total phenolic contents and total flavonoids contents) and free radical scavenging activity of ethanolic and watery extracts of Michelia champaca L. (Sagawa flower). The results indicated that M. champaca was more soluble in polar solvent and it had pronounced effects on both phenolic compound levels and antioxidant potential. Ethanolic extract contained the higher amounts of bioactive compounds and exhibited the better antioxidant activity than watery extract. The evaluation of antioxidant activity of both extracts revealed highly significant correlation between anti-radical ability and total phenolic and total flavonoid contents.	2022
2102	Khine Yee Htoo	PHOTOCATALYTIC ACTIVITIES OF SYNTHESIZED TIN(IV) OXIDE NANOPARTICLES BY USING AQUEOUS EXTRACT OF CITRUS AURANTIFOLIA LEAVES	Citrus aurantifolia leaves aqueous extract was used to synthesize tin(IV) oxide nanoparticles utilizing a straightforward, environmentally friendly, and inexpensive approach. Aqueous leaves extract of C. aurantifolia was utilized as a reducing agent, while tin(II) chloride dihydrate was utilized as the starting material. SnO2 NPs were produced at 600 �C, according to an X-ray diffractogram (XRD) examination, and their crystallite size was 28.7 nm when they were made with an aqueous leaf extract. The distinctive peak of SnO2 was visible in the 450�790 cm-1 range according to the results of the FT IR investigation. SEM examination revealed SnO2 NPs with very minor agglomerations. The average crystallite size of SnO2 NPs was determined by TEM examination to be consistent with the XRD results. For the commercial dye, methyl violet, which serves as a representative organic dye pollutant, the produced SnO2 NPs demonstrated outstanding degrading efficiency. The ideal conditions for the photocatalytic degradation of 10 ppm of methyl violet were achieved using 0.5 g of SnO2 NPs in the sunlight for 8 h.	2022
2103	Swe Sint	IRON OXIDE PARTICLES ASSISTED PHYTOREMEDIATION OF SOIL CONTAMINATED WITH CYPERMETHRIN RESIDUE	Cypermethrin is one of the most widely used pyrethroid insecticides against different pests, and its use causes soil contamination. The removal of 3-phenoxybenzoic acid (3-PBA), a secondary metabolite of cypermethrin, from contaminated soil by phytoremediation with four plants species: Peanut (Arachis hypogaea L.), Sesame (Sesamum indicum L.), Aster (Callistephus chinensis (L.) Nees) and Bermuda grass (Cynodon dactylon L. Pers.) was investigated in the absence and presence of iron oxide particles (0.01 g/kg of soil). The insecticide residue percent in the soil samples was determined by UV-Vis and GC-MS. The results showed that presence of iron oxide particles is important in the removal of cypermethrin. Good phytoremediation was demonstrated only by Aster and Bermuda grass (64.19 % and 96.7 % PBA removal) in 12 weeks period. Furthermore, the activities of soil urease (mg NH4 + -N g-1 soil h -1 ) and dehydrogenase (�g TPF g -1 soil h-1 ) also increased in the treated soil samples as determined by phenol-hypochlorite colorimetric method and Triphenyl Tetrazolium Chloride (TTC) assay method: Aster (4.45 � 0.17) and Bermuda grass (4.68 � 0.04) compared to uncultivated soil (S0) (3.74 � 0.03), and (0.0017 � 1.547 x 10-4 ) and (0.0016 � 1.516 x 10-4 ) compared to S0 (0.0008 � 0.424 x 10-4 ), respectively. The results demonstrated that Aster and Bermuda grass showed great promising potential as Phyto remediating agents.	2022
2104	Aye Aye Thant	SCREENING OF PHYTOCHEMICALS AND SOME BIOLOGICAL ACTIVITIES OF THE AERIAL PARTS OF BACOPA MONNIERI (L.) WETTST. (BYONE-HMWE)	The aim of the study was to screen some phytochemical constituents of Bacopa monnieri (L.) Byone-hmwe such as total phenolic and total flavonoids contents, and some biological activities such as antioxidant, antimicrobial, and antiproliferative activities. The total phenolic content was determined by Folin-Ciocalteu�s assay and expressed as GAE equivalent. An aluminium chloride colorimetric assay was used to calculate the total flavonoids content, which was then expressed as QE equivalent. The antioxidant activity of ethanol and water extracts of B. monnieri was determined by DPPH assay. These assays found that the ethanol extract (IC50 = 470.15 �g/mL) was more potent than the water extract (IC50 =770.54 �g/mL) in antioxidant activity. The ethyl acetate extract of the plant was found to have high potent antimicrobial activities against all six tested microorganisms, with inhibition zone diameters (21-26 mm) determined by agar well diffusion method those of petether, ethanol and water extracts. The in vitro antiproliferative activity of ethanol extract was more potent against A549 (lung) and Hela (cervical) human cancer cell lines (IC50 = 115.03 �g/mL and IC50 = 129.95 �g/mL) than the water extract determined by MTT assay.	2022
2105	Aung Than Htwe	MORPHOLOGICAL, STRUCTURAL AND THERMAL PROPERTIES OF CHITOSAN/GRAPHENE OXIDE BIONANOCOMPOSITES	Graphene oxide (GO) has been successfully synthesized from graphite powder using the Hummer�s method. In this research, an ecofriendly bionanocomposite material has been fabricated from chitosan (CS)/graphene oxide (GO) by the casting method. The synthesized GO and CSGO were characterized by using FT IR, XRD, FESEM, TG-DTA and UV-Vis spectroscopy. Finally, the size and surface charge of synthesized nanoparticles were determined using the dynamic light scattering (DLS) and zeta potential analyzer, respectively. The results obtained from those different studies revealed that chitosan and graphene oxide could mix with each other homogeneously.	2022
2106	Tin Myo Khaing	A STUDY OF SOME BIOACTIVITIES AND ISOLATION OF PURE ORGANIC COMPOUNDS FROM THE BARK OF DOCYNIA INDICA (WALL.) DECNE (PIN-SEIN)	In the research work, the bark of Docynia indica (Wall.) Decne (Pin-Sein) was collected from Pang Wa Village, Loi Mwe Township, Shan State. Phytochemical constituents present in the bark of PinSein were investigated according to the general methods. Two kinds of nutritional values (moisture and ash) of Pin-Sein bark were determined by oven dry method and AOAC method. In addition, the elemental contents in this sample were determined by EDXRF. The antimicrobial activities of the various crude extracts were tested by agar well diffusion method on six selected microorganisms (Bacillus subtilis, Staphylococcus aureus, Salmonella typhi, Bacillus pumilus, Candida albicans and Escherichia coli). Moreover, antioxidant activity of crude extract of Pin-Sein bark was measured by DPPH free radical scavenging assay method. The pure organic compounds, TMK-1 and TMK-2 were isolated from the bark of Pin-Sein by thin layer and column chromatographic techniques. Finally, these isolated compounds were identified by phytochemical tests and their respective melting point. The functional groups of pure organic compounds were identified by FT IR spectral data.	2022
2107	Hnin Yu Wai	PREPARATION AND CHARACTERIZATION OF ECO-FRIENDLY BIOPLASTICS FROM SAWDUST BIOMASS WASTE	The present work is concerned with the preparation and characterization of sawdust-derived cellulose based bioplastics. Sawdust was collected from Family Saw Mill, North Okkalapa Township, Yangon Region, Myanmar. The physicochemical properties (such as moisture content, ash content, bulk density, and pH) of sawdust was determined by conventional methods and also characterized by modern techniques such as FT IR, SEM and TG DTA analyses. The cellulose in sawdust powder was prepared by using alkali treatment, bleaching process and hydrolysis method. The yield percent of the cellulose from sawdust powder was 36.6 %. Prepared cellulose was characterized by FT IR, SEM and XRD analyses. Bioplastics were prepared by mixing with various proportions (1, 2, 3, 4, 5, 6 g) of cellulose using 50 mL of water, 2 mL of acetic acid and 0.5 mL of sorbitol as plasticizer. The most favourable conditions for preparing bioplastic namely (SCB 3) was found to be 3 g of cellulose with 0.5 mL of sorbitol and 2 mL of acetic acid, was the most suitable for preparing bioplastic. It was found that the bioplastic (SCB 3) possesses tensile strength (9.40 MPa), elongation at break (45.00 %) and tear strength (56.70 kNm-1 ). The selected bioplastic SCB 3 was characterized by FT IR, SEM and TG DTA analyses. All prepared bioplastics showed a plain, clear, smooth surface, were flexible, and pale yellow in colour. The prepared bioplastics can be used in packaging.	2022
2108	Cho Cho Thet	DECONTAMINATION OF ARSENIC IN AQUEOUS SOLUTION BY MANGANESE FERRITES*	Decontamination of pentavalent arsenic (As5+) ions in aqueous solution by manganese ferrites (MnFe2O4) was presented in this paper. MnFe2O4 were prepared by sonochemical synthesis method and they were used as adsorbents for removal of arsenic. The essential parameters such as pH of the precursor and post annealing temperature based on the formation of spinel manganese ferrite were discussed. The structural properties of manganese ferrites including compound identification, the crystal structure and surface morphology were investigated by Fourier transform infrared (FT-IR), X-ray diffraction (XRD) and Scanning electron microscope (SEM). The adsorption behaviour of As5+ ions on the manganese ferrite has been performed by batch adsorption experiment. The concentration of arsenic adsorbed on manganese ferrite was determined by atomic absorption spectroscopy coupled with hydride vapour generation (HVG-AAS). The adsorption capacity was fitted with the Langmuir isotherm model. The decontamination efficiency and adsorption amount of As determined from Langmuir isotherm model were discussed.	2022
2109	Aung Zaw Myint	DIGITAL IMAGE PROCESSING OF MYANMAR AUTOMOBILE NUMBER PLATE RECOGNITION USING MATLAB	This paper presents an image processing method for recognizing a Myanmar automobile license number plate. An optical character recognition method is used to read the license plates. The boundary method is applied for characters segmentation. The implementation of the system is simulated on MATLAB software. In this paper, automobile license number plate is detected and segmented successfully.	2022
2110	Win Mar	COMPARISON OF SHIELDING STRENGTH FOR LEAD, COPPER AND ALUMINUM	Human safety and structural material that may be compromised from radiation exposure are vital concerns in nuclear technology. Gamma attenuation coefficient of shielding material is measured using a proper electronic system under condition of narrow beam geometry. The radiation shielding characteristics of three elemental materials were examined by using half thickness method. From the experimental data, it is found that while only 0.6cm thickness of lead is required to reduce the gamma photon intensity to half of its original value, about 1.2 cm of copper and 1.8 cm of aluminum. To achieve this goal, linear attenuation coefficient of these samples was calculated. It is cleared that lead has a far better absorber of gamma photon than copper and aluminum. In this research, comparing shielding strength of the three elemental materials, it is concluded that lead is the best as copper is the second and aluminum is the third.	2022

Research Publications

Myanmar Academy of Art & Science List of Research