Research List

No.	Researcher	Title	Abstract	Year
1081	Saw Win	STUDY ON THE FABRICATION, EVALUATION OF MECHANICAL AND PHYSICAL PROPERTIES OF PARTICLEBOARD MADE FROM GIANT REED (ARUNDO DONAX L.) AND APPLICATION	Single-layer experimental particleboards were made from internode of giant reed culms with different particle sizes (4 mm, 2 mm, 1 mm, 500 ?m, 250 ?m) of particles bonded with ureaformaldehyde resin. Urea-formaldehyde resin (25 %) was mixed with 2 mL of 0.4 % ammonium sulphate hardener and 1 mL cashew nut shell liquid for each panel to improve strength and other properties. The panels were tested for mechanical properties including modulus of rupture (MOR), impact strength, hardness, tensile strength and physical properties such as density, moisture content (MC), water absorption (WA) and swelling thickness (ST) according to the procedures defined by British Standard and Indian Standard methods. The overall results showed that most panels fulfilled FAO (2013) standard for MOR, WA and ST. The surface fracture of PBS4 (500 ?m) is more uniform and fibers are not pull out from the surface. This tend to be more enhanced the MOR, less WA and ST of particleboard. PBS4 (500 ?m) had the highest MOR, the lowest WA and ST values. Particle size was found to have a profound effect on the board properties.	2020
1082	Htwe Htwe Mar	UTILIZATION OF ACTIVATED DURIAN PEEL AS A SORBENT FOR REMOVAL OF DIRECT BLUE DYE FROM AQUEOUS SOLUTION	In the present study, activated durian (Durio zibethinus L.) peel was used as a waste sorbent for the colour removal of direct blue dye (Direct Sky Blue FB 100 %, pH = 8.4) from aqueous solution. This research work concerns with the preparation of acid activated durian peel samples (ADP-1 to ADP-5) by using various amounts (1 to 5 % v/v) of hydrochloric acid. According to the results of some physicochemical properties (bulk density and specific surface area), ADP-4 was chosen for removal of direct blue dye. The sorption capacity of ADP-4 was determined as a function of initial concentration, pH, contact time and dosage of sorbent. The maximum removal percent of direct blue dye was found to be 84.308 % at 150 ppm of initial concentration, pH 8, 90 min of contact time and 0.2 g of dosage. This sample was characterized by using FT IR and SEM analyses before and after sorption. The equilibrium data were applied on isotherm models. According to Langmuir and Freundlich isotherms, the monolayer coverage value (Qo) was found to be 29.499 mg g-1 and the adsorption capacity (Kf) was found to be 4.191 mg g-1 . The experimental sorption data were fitted both isotherm models and sorption conditions were favourable. ADP-4 is a good sorbent for direct blue dye (Direct Sky Blue FB 100 %) from aqueous solution.	2020
1083	Swe Swe Mon	INVESTIGATION OF ANTIDIABETIC ACTIVITY AND STRUCTURAL ELUCIDATION OF DIHYDROCHALCONE COMPOUND ISOLATED FROM MYANMAR TRADITIONAL MEDICINAL PLANT, Grewia nervosa (Lour.) Panigrahi	Grewia nervosa (Lour.) Panigrahi was distributed in Bangladesh, India, Sri Lanka, Cambodia, Laos, Thiland, Vietnam, Indonesia, Malaysia and Myanmar and it is locally called in Myanmar as Mya-yar. The roots of Mya-yar were collected from Pyin Oo Lwin Township, Mandalay Region, Myanmar. Antidiabetic effect of methanol extract of root of G. nervosa was done at Department of Biotechnology, Mandalay Technological University, Pathein Gyi Township, Mandalay Region, Myanmar. In addition, dihydrochalcone compound was isolated from ethyl acetate extract of the selected sample by thin layer and column chromatography methods. The structure of this compound was elucidated by analysis of NMR spectroscopic and mass spectrometric data.	2020
1084	Toe Toe Lwin	A STUDY ON EFFECTS OF GAMMA IRRADIATION ON FRESH CUCUMBER FRUIT (Cucumis sativus L.)	Cucumber is a versatile food and features in a number of beauty products. This research deals with the study on the effects of gamma irradiation on some physicochemical properties (shelf life, weight loss, pH, moisture, vitamin C) of fresh cucumber fruit due to the highest content of water and light sensitive of vitamin C in it. The sample was collected from Mhawbi market, Yangon Region. This sample was gamma irradiated with 0.5 kGy and 0.7 kGy doses from Co-60 source. The non-irradiated sample was used as comparative study. The shelf life of non-irradiated and two doses of gamma irradiated samples were assessed by changing cucumber skin colour and weight loss at room temperature (29 ?C and humidity 74 %). The experimental results revealed that, the shelf life of 0.5 kGy and 0.7 kGy doses of ? irradiated cucumber sample (7 days) was prolonged two times than that of non-irradiated sample (3 days) at room temperature under same condition. At day-2, there were no weight loss of all ?-irradiated samples whereas non-irradiated sample lose 4.5 % of original weight. The moisture contents and pH values of non-irradiated and ? irradiated samples of 0.5 kGy , and 0.7 kGy doses were found to be (97.90 % , 88.89 % , 82.56 % ) and (5.67, 5.93, 5.51 ) by using moisture balance and pH meter. Vitamin C contents of all these samples were found to be 6.34 mg/100g on a fresh weight basis by using iodmetoric titration at day-2. During the storage time, Vitamin C contents of ? irradiated samples of 0.5 kGy, and 0.7 kGy doses were found to be slightly reduced from 6.34 mg/ 100g to 5.37 mg/100g from day-2 to day-5 and from 5.37 mg/100g to 4.29 mg/100g from day-5 to day-7. The pH values of ? irradiated samples of 0.5 kGy , and 0.7 kGy doses were found to be slightly reduced from 5.93 to 4.62 and 5.51 to 4.91 from day-2 to day-7, receptively. From these results, the shelf life of ? irradiated cucumber fruit extended two times than that of control to distribute as fresh product. The vitamin C contents and pH values of irradiated samples are slightly reduced during the storage time.	2020
1085	Ko Ko Aung	STUDY ON THE PREPARATION OF RUBBER COMPOSITE FROM WASTE TYRE, RUBBER AND NEUTRALIZED WASTE LEATHER PARTICLES	Scrap tyre and waste leather products are major environmental problem for disposal. To overcome this problem, it is needed to reuse into another purpose. Therefore in this research, waste tyre and waste leather were used as filler in rubber compounding which also reduced the cost of production. Waste tyre and waste chrome tanning leather sample (neutralized with ammonia) were collected from tyre shop and leather mill. In this research 6 types of rubber composites RLC I � VI were made by using different amounts of waste tyre and fixed amount of waste leather. All these composites were investigated their physicochemical and physicomechanical properties. In the series of RLC I � VI, RLC VI (100 phr of NR, 100 phr of waste chrome leather neutralized with NH3 and 600 phr of waste tyre) had the highest tensile strength 6.63MPa, elongation at break 232 %, tear strength 62.0 N/mm and 100 % modulus 6.63 %. RLC VI was more resist to strain and stress. Among the prepared flooring RLC VI was selected due to its highest 100% modulus which resists the pressure and the neutralizing agent (NH3) used in leather waste did not cause adverse effect on environment. The comparison of surface morphology and thermal resistance of RLC VI and commercial flooring was performed. The surface of RLC VI was smoother than that of commercial flooring. Thermal resistances of both were nearly the same. Weight loss of RLC VI was 65.86 % and commercial was 71.896 %. The cost of prepared flooring was 2710 kyats per 4??7? sheet while the commercial was 7500 kyats per sheet. Therefore this prepared rubber composite flooring can be substituted in commercial flooring.	2020
1086	Aye Aye Mon	ULTRATHIN IrCo NANODENDRITIC ELECTROCATALYSTS FOR THE OXYGEN EVOLUTION REACTION	Among the shape-controlled nanostructures of nanocatalysts, nanodendrites (ND) have attracted great interest, because the rich edges and corners atoms resulting from dendrites structure which are conductive for high catalytic activity. In this study, Ir electrocatalysts doped with different amounts of Co were synthesized by an ethylene glycol (EG) reduction method. Ir and IrCo nanocrystals with Ir/Co ratio of 3:1 (IrCo-3:1) showed nanodendrites structure. Among the samples, IrCo-3:1 sample has excellent electrocatalytic activity toward oxygen evolution reaction (OER) in both acid and alkaline conditions with a minimal onset potential (Vs RHE) and a very low Tafelslope than that of IrCo-1:1 and Ir samples. IrCo-3:1 nanodendrites sample also exhibit good stability under both acid and alkaline solution with negligible degradation after 12 h of chronoamperometry test, revealing their excellent stability under OER conditions.	2020
1087	Moe Tin Khaing	CHARACTERIZATION OF SOIL USED IN POTTERY MAKING OF NWENYEIN QUARTER, KYAUK-MYAUNG, SHWEBO DISTRICT, SAGAING REGION	This research is aimed to investigate the physicochemical constituents of soil samples from the well-known glazed pot industry of Nwe-nyein and to characterize these soil samples by advanced spectroscopic techniques. Potters make earthen and glazed pot by mixing too types of soil: yellow soil (sample 1) and red soil (sample 2). They prepare the combined soil (sample 3) by mixing these two types of soil with two: one ratio by weight of yellow and red soil. pH, moisture, colour, electrical conductivity and cations exchange capacity of yellow soil, red soil and combined soil samples were measured by their respective methods to explore their physicochemical properties. Then exchangeable cations analysis informed the cations exchange capacity (CEC), Sodium Adsorption Ratio (SAR), Exchangeable Sodium Percentage (ESP %) and Exchangeable Magnesium Percentage (EMgP %) of tested soil samples and the values of SAR pointed out that all soils were dispersive due to the sodium contents. Textural analysis was done on all soil samples and they were classified as clay. Soluable salt extraction tests were carried out by titration methods to detect the amount of soluble chloride, sulphate, carbonate and bicarbonate but the bicarbonate was not found in all samples. To characterize soil constituents, Energy Dispersive X-ray (EDX) and Scanning Electron Microscopic techniques(SEM) were also applied. According to the EDX results, the highest relative abundance of Si were 42.06 %, 42.55 % and 44.50 % in sample 1, sample 2 and sample 3 respectively and it was followed by the percentages of Fe with 25.92 %, 30.36 % and 28.53 %. Heavy toxic mineral constituents were not found in these soils. SEM examination showed that the crystal like structure of sample 1 and flaky similar soil structures with many porous could be observed in the soil sample 2 and 3. It was concluded that the soil samples used in Nwe-nyein pottery industry were suitable for pottery making and the products of this area were popular in the whole Myanmar.	2020
1088	Shwe Sin	STUDY ON TRADITIONAL MEDICINE (SETKUPALA No.2) FOR EYE DISEASES	This research was studied on determination of antioxidant activity, toxicity of some elemental content, and antimicrobial activity of Traditional Eye Medicine, Setkupala (No.2) manufactured by Ministry of Health. In this work, the sample was collected from Myanmar Traditional Medicine shop, Yangon. Percent inhibition of the watery extract was tested by DPPH assay method. IC50 value of the sample was calculated by linear regression excel program. From the results, it is noted that IC50 values of Setkupala (No.2) had slight antioxidant activity. The elemental content of the sample was investigated by EDXRF and AAS methods. Iron content was higher than Selenium, Zinc, and Manganese in the sample whereas the content of Arsenic and Lead were present in the highest toxic elements. The contents of Iron, Arsenic, and Lead in the samples based on one oral dose (five tablets) per day were over the maximum permissible level of WHO standard. In the determination of antimicrobial activity, Bacillus subtilis ( N.C.T.C- 8236), Bacillus pumilus (N.C.I.B-8982), Staphylococcus aureus (N.C.P.C- 6371), Pseudomonas aeruginosa (6749), Candida albicans, and E.coli (N.C.I.B- 8134) strains were used Antimicrobial activity test was done by using agar well diffusion method. According to the study of antimicrobial activity, it was clearly noticed that the different extracts of Setkupala (No.2) were effective against the different strains.T herefore, Setkupala (No.2)had antimicrobial activity. From the phytochemical investigation, it is found that the carbohydrates, glycosides, phenolic compounds, reducing sugars, saponins and tannins were present in the sample. Moreover, the sample was examined by FT IR and HPLC method.	2020
1089	Hta Hta Win	STUDY ON COMPARATIVE ADSORPTION EFFICIENCIES OF RICE STRAW AND COCONUT HUSK (FIBRE) BY USING CONGO RED DYE	Adsorption of congo red from aqueous solution onto rice straw (RS) and coconut husk fibre (CCH) under batch conditions was investigated. Before sorption process, the physicochemical properties of RS and CCH fibre such as moisture content, ash content, bulk density and pH were determined by standard methods. The samples was characterized by SEM. Adsorption was studied as a function of amount of adsorbent, contact time, pH and various concentrations with time. It was carried out at pH 6. A synthetic solution of 25 mg/L of the dye was used. The optimum contact time was 120 min and 0.2g was a suitable dose of sorbent.The sorption properties of congo red were spectrophotometrically determined.The highest removal percent of congo red by rice straw powder (80.31%) and coconut husk fibre powder (74.96%) were observed.	2020
1090	Kyu Kyu Maw	STRUCTURE ELUCIDATION OF A PURE ORGANICCOMPOUND ISOLATED FROM THE BARK OF ADINA CORDIFOLIA HOOK.F (HNAW)	One of Myanmar indigenous medicinal plant, Adina cordiforlia Hook.f (Hnaw) was selected for chemical analysis. A pure organic compound was isolated from the bark of Hnaw by using advanced separation methods such as Thin Layer and Column Chromatography. The yield percent of this pure green crystal compound was found to be 2.35 % based upon the ethyl acetate crude extract. The pure isolated organic compound responds medium activity on Bacillus pumilus and E. coli and low activities against Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans. The molecular formula of the pure compound was determined as C22H22O8 by using some spectroscopic techniques such as FT IR, 1H NMR (500 MHz), 13C NMR (125 MHz), DQFCOSY, HMQC, HMBC and EI-Mass spectral data. Hydrogen deficiency index of this compound is 12. Finally, the complete structure of this pure compound as dimer of 2-hydroxy-4-ethoxy cis-coumaric acid was elucidated by employing DQF-COSY, 1H NMR splitting patterns, coupling constant (J- value) and HMBC spectroscopic studies.	2020

Research Publications

Myanmar Academy of Art & Science List of Research