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No. Researcher Title Abstract Year
31 Aung Than Htwe SYNTHESIS OF CHITOSAN BASED POLYVINYLALCOHOL HYDROGEL FOR LOADING WITH CONTROLLED-RELEASED FERTILIZER The use of controlledreleased fertilier hydrogel has become a ne trend to save fertilier consumption, and to reduce environmental pollution and safety application in agriculture. In agriculture, loss of nutrient elements is one of the large problems. o controlledrelease is a method used to slove this problem. This paper describes the phosphorus release behavior of controlledreleased fertilier CR hydrogels. The CR hydrogel as prepared by mixing chitosan solution, polyvinyl alcohol hydrogel and fertilier solution. The selling ratio, ater retention and fertilier release behavior of prepared CR hydrogel in ater and soil ere investigated. Therefore, the chemical nature as important that affected the degree of selling of the hydrogel. Cultivation of chilli and maie seed tested using the various amount of prepared CR hydrogel samples. The investigation of agronomical characters of the generation seeds ere described 2018
32 Jue Jue Khin SOME METAL CONTENTS IN SEA WATER AND SEDIMENT SAMPLE AROND CHANG THA AREA IN AYEYARWADY REGION MYANMAR Pollution of heavy metals in aquatic environment is a growing problem worldwide and currently it has reached an alarming rate. There are various sources of heavy metals; most of them originate from anthropogenic activities like draining of sewerage and recreational activities. As heavy metals cannot be degraded, they are continuously being deposited and incorporated in water and sediment, thus causing heavy metal pollution in water bodies. In this research sea water and sediment samples were collected seasonally and annually in (2012-2014). Heavy metal (Cr, Mn, Fe, Cu, n, As, Pb, Cd and Hg) contents were determined to identify pollution hot spots in the studied area. Sampling sites were recorded by using GPS detector. The concentrations of metals were determined by atomic absorption spectrometry (AAS) technique and compared with acceptable levels of ASEAN, EPA and CBSGs standards. 2018
33 Poh Poh Win ASSESSMENT ON THE WATER ALITY AT THE MOTH OF PATHEIN RIVER AYEYARWADY REGION MYANMAR The aim of this paper is to assess the water quality of Patheinriver around the river mouth and to evaluate the pollution loading and water quality criteria of Pathein river. In this paper, a total of 9 river water samples were collected near Payala Village in hot, rainy and cold seasons of the year 2014. Sampling sites were recorded with GPS detector. Some physicochemical properties (pH, DO, TSS, turbidity, chlorinity, salinity, total alkalinity, total hardness, BOD and COD)and nutrient levels (orthophosphate, organic phosphate, total phosphate, total nitrogen and chlorophyll a) were determined. Trace metals (As, Cd, Pb, Hg, Fe, n, Cr, Mn and Cu) concentrations of the river water samples were determined. (Based on DO (7.16-7.39 ppm),orthophosphate (0.15-0.24ppm) and total nitrogen(1.12-1.56 ppm) values, the river water near Payala village could be identified as low and medium nutrient enrichment, i.e., oligotrophic in hot season and mesotrophic in rainy and cold seasons.) 2018
34 Sandar Win PREPARATION AND CHARACTERIZATION OF THE CHITOSAN FILM FOR PACKAGING MATERIAL This research work was concerned with the preparation, characterization and application of biodegradable chitosan (C) film to be used as a packaging materials. A series of chtisoan (C) film was prepared using different amounts of chitosan by solvent evaporating method. In this preparation 1%, 2%, 3% and 4% of chitosan solutions kept in an autoclave under 0.1 MPa pressure at 121C for 20 min were used. The homogeneous chitosan solutions after autoclaving were casted on melamine plate and left for a few days. The chitosan films obtained were characterized according to physicomechanical and physicochemical properties. The prepared C films were characterized by mechanical properties such as tensile strength, elongation at break and tear strength. According to the mechanical properties, 2 % w/v C was the most suitable for preparing C-2 film. Prepared C-2 film was characterized by modern techniques such as SEM, FT IR and TG-DTA. Antimicrobial activities of C-2 film was investigated by agar-disc diffusion method. Biodegradability of prepared C-2 film was studied by soil burial method. The quality controlling factors of mango fruits (water content, titratable acidity, reducing sugar content, crude fiber, total soluble solid, effect of pH, refractive index and weight loss) were investigated by using prepared film (C-2) as packaging materials. It was found that, for all unpackaged (control) mango fruits and packaged fruits, water contents, sugar contents, and crude fiber contents were slightly increased, but the weight loss percents were sharply increased (inverse of pH). One determining quality controlling factor was the total solubility that decreases for unpackaged (control) mango fruit, i.e, control where as it increases for packaged mango fruit, i.e, mangoes packaged by C-2 film. Moreover, unpackaged (control) mango fruits started to undergo spoilage after 10 days. However, it was found that package of mango fruits showed longer shelf life, that is, with a longer ripening time compared unpackaged (control) fruits. 2018
35 Aung Phyo Naing INVESTIGATION OF ANTIOXIDANT CYTOTOXIC AND ANTITMOR ACTIVITIES OF Mrinda citriia L. FRIT (Y-YO) AND atarants rss L. WHOLE PLANT (THIN-BAW-MA-NYOE) s such as antioxidant, cytotoxic and antitumor activities on some crude extracts from locally cultivated Morinda citrifolia L. fruits (Y-yo) and Catharanthus roseus L. whole plant (Thin-baw-ma-nyoe). The antioxidant activity of ethanol and watery extracts evaluated by DPPH free radical scavenging assay showed that IC50 values of EtOH extract (4.395 mg/mL) and watery extract (8.878 mg/mL) from C. roseus were repsectively higher than those of EtOH extract (9.347 mg/mL) and watery extract (8.484 mg/mL) from M. citrifolia. The ethanol and watery extracts of both plant samples did not exhibit the cytotoxic effect determined by using brine shrimp cytotoxicity bioassay method. Antitumor activity screening determined by potato crown gall test revealed that ethanol and watery extracts of M. citrifolia and C. roseus can inhibit tumor growth. Tumor inhibition was significantly observed in the concentration of 0.2 g /mL for each extract. 2018
36 Aye Aye Than EFFECT OF ALKALI CONCENTRATION ON THE PREPARATION OF VOLCANIC MD AND ARRY DST BASED GEOPOLYMER The volcanic mud sample was collected from Yauk Chaung Village, Kyaukphyu Township, Rakhine State and quarry dust from Loikaw Township, Kayah State. The physical properties (moisture content, loss - on -ignition, specific gravity ,fineness, pH and pozzolanic reactivity) of volcanic mud and quarry dust samples were determined and characterized by conventional and modern spectroscopic methods (EDXRF, XRD and SEM).From the EDXRF and XRD analysis, it was observed that the major oxide compositions were present as SiO2, CaO, Fe2O3 and Al2O3 in both samples. It was found that the samples were silica-alumina rich compound. From the SEM micrographs, the microstructure of quarry dust appeared to be glassy, hollow and porous structure . In the microstructure of volcanic mud sample, the micrograph indicates crystalline nature. It can be considered that the pores are micro-porosity sized particles. The optimum conditions of sodium hydroxide concentration and the ratio of sodium hydroxide and sodium silicate which are used in the preparation of geopolymer have been determined. The physical properties (apparent porosity, water absorption, apparent density) and the mechanical properties (compressive strength) of prepared volcanicmud based geopolymer were also determined. Compressive strength of geopolymer ranged from 6.70 to 21.41N/mm2.The mechanical properties compressive strength of prepared volcanic mud-quarry dust based geopolymer (GP) and blended cement (GP: Cement) (1:1, 1:2, 2:1) at different time intervals (7, 14 and 28 days) have been determined. 2018
37 Cho Lwin Lwin Khine PREPARATION AND CHARACTERIZATION OF HYDROXYAPATITE-MGO NANOCOMPOSITES AND THEIR ANTIMICROBIAL ACTIVITY AND ACTE TOXICITY The application of pure hydroxyapatite (HAp) are restricted to non load-bearing implants due to the poor mechanical properties of hydroxyapatite. To improve the mechanical properties of hydroxyapatite derived from cow bone, incorporation of magnesium oxide was conducted in this research. Hydroxyapatite was prepared by calcination of deproteinised cow bone waste using HCl and NaOH solutions. Magnesium oxide was prepared by wet chemical method treating magnesium nitrate solution with sodium hydroxide solution followed by thermal decomposition of magnesium hydroxide at 600 C. After addition of magnesium oxide to HAp, the XRD pattern showed the two new peaks corresponding to magnesium oxide peaks at (200) and (220). Crystallite sizes of hydroxyapatite - MgO nanocomposites were 32.17 nm and 37.87 nm for HAp-5 % MgO nanocomposites calcined at 1000 C and 1100 C respectively. For HAp-10 % MgO nanocomposites the crystallite sizes were 31.46 nm and 36.70 nm, respectively for calcination temperature of 1000 C and 1100 C. Crystal structures of all HAp-MgO nanocomposites and HAp were indexed as hexagonal. FT IR spectral data revealed the characteristics peaks of both hydroxyapatite and MgO in the prepared nanocomposites. HAp-MgO nanocomposites showed mild antimicrobial activities on all tested organisms such as Bacillus subtilis, Pseudomonas aeruginosa, Candida albicans, Escherichia coli, Staphylococcus aureus and Bacillus pumilus. In vivo acute toxicity test on albino mice showed no mortality and no toxicity throughout the dosing schedule of 14 days at all dose levels in all groups. 2018
38 Kay Thi Tun COMPARATIVE STDIES ON THE PREPARATION AND CHARACTERIZATION OF LAFeO NANOCRYSTALLITE POWDER BY CITRATE SOL- GEL METHOD AND CO-PRECIPITATION METHOD ng material for its interesting electrical, magnetic, catalytic and thermoelectric properties. In this study, the nanocrystalline LaFeO3 powder was prepared by citrate sol-gel method and co-precipitation method.In the citrate sol gel method, a modified Pechini method based on the polyesterification of citric acid and ethylene glycol for the synthesis of the LaFeO3 The precursor for LaFeO3 will be synthesized by co-precipitation from metal nitrate and carbonate salts. The properties of the LaFeO3 powders were studied by TG-DTA, XRD, SEM, FT IR and EDXRF. The results showed that LaFeO3was formed at the lower temperature in the citrate sol-gel method compared to co-precipitation method. The size of spherical LaFeO3 synthesized by sol-gel was 20-25nm, whereas the sample prepared by co-precipitation yielded nearly tetragonal and flake like powder with particle size of 20-35nm. The difference in preparation methods results in the difference in the structure and morphology of prepared materials. 2018
39 Khine Zar Linn STDY ON SOME BIOACTIVITIES OF SLAR-NA-PHAR (AA MSA L.) PLANT obial, radical scavenging and cytotoxic activities of Sular-na-phar (ldenlandiacorymbosa L.) plant and its bioactive compound were investigated. The antitumor activity of the H2O and EtOH extracts of Sularna-phar was examined by using PCG (Potato Crown Gall) test with the isolated bacterium A. tumefaciens and only H2O extract prevented the formation of tumor. The antimicrobial activity of the crude extracts from this plant sample was determined against six strains of microorganisms by agar well diffusion methods at PRD (Pharmaceutical Research Department). The pet ether extract of Sular-na-phar did not show the antimicrobial activity. However, the EtOH and H2O extracts possessed medium and EtOAc extract possessed high antimicrobial activities. Radical scavenging activity of EtOH and H2O extract samples was determined by 1, 1-diphenyl2-picrylhydrazyl (DPPH) Assay. EtOH extract showed stronger radical scavenging activity than H2O extract of plant sample. Cytotoxic effect of EtOH and H2O extracts of whole plant of Sular-na-pharwas investigated against Artemiasalina(Brine Shrimp). The cytotoxic effect of plant extracts was not found on Brine Shrimp up to maximum dose of 1000 g/mL. The bioactive compound(white colour crystal, 0.0285%) was isolated from defatted MeOH extract of . corymbosa (Sular-na-phar) on the silica gel column chromatographic separation. The isolated compound was identified asursolic acid by physico-chemical properties and modern spectroscopic techinques such as UV, FT IR, 1HNMR, 13C NMR spectrometry as well as by comparing with the reported data. Finally, invitro cytotoxicity was also screened by using MTS Cell Proliferation Colourimetric Assay, against H1299, Clone no. 9, A549 and MCF-7 cell lines. According to the results, cell viability cannot be inhibited by ursolic acid for H1299 and Clone no. 9 cell lines significantly. However, the cell viability of A549 and MCF-7 cell can be effectively inhibited by ursolic acid. 2018
40 Kyaw Khaing INVESTIGATION OF CHEMICAL PROPERTIES AND BIOLOGIICAL ACTIVITIES OF STEM OF Coccinia cordifolia COGN. (KIN-PON) AND BARK OF Dolichandrone serrulata SEEM. (THA-KHUT) In this research work, stem of Coccinia corifolia Cogn. (Kn-pon) and bark of Dolichanrone serrulata Seem. (Tha-khut) were collected from Yekyi Township, Ayarwaddy Region for the investigation of chemical and biological properties such as antimicrobial activity, antioxidant activity, anti-arthritic activity and antitumor activity due to lack of scientific report on these two locally cultivated medicinal plants. Relative abundances of elements analysed by EDXRF showed the presence of calcium, potassium, sulphur, manganese, iron, stronium, zinc and copper in the stems of Kinpon and calcium, potassium, sulphur, zinc, copper and rubidium in the barks of Tha-khut. Determination of nutritional values has also screen carried out by AOAC method resulting moisture (10.69 %), ash (11.81 %), protein (8.71 %), fiber (36.90 %), fat (0.89 %), carbohydrate (31.00 %) and energy value (169 kcal/100 g) in stems of Kin-pon and moisture (11.25 %), ash (9.55 %), protein (2.29 %), fiber (36.17 %), fat (0.08 %), carbohydrate (40.66 %) and energy value (173 kcal/100 g) in the barks of Tha-khut. In the stems of Kin-pon and the barks of Tha-khut, alkaloids, -amino acids, carbohydrates, flavonoids, glycosides, organic acids, phenolic compounds, reducing sugars, saponins, starchs, tannins, terpenoids and steroids were found to be present according to preliminary phytochemical tests. However, cyanogenic glycosides were not found in these samples Total phenol contents, total flavonoid contents and reducing ability of the ethanol extracts have been respectively determined by using Folin-Ciocalteu (F-C) method, Kiranmai et al. method and Oyaizu method in the ethanol crude extracts from the selcted samples. In addition, antimicrobial activity screening was done on various crude extracts by agar well diffusion method against on Bacillus subtilis, Staphylococus aureus, seuomonas aeruinosa, Bacillus pumilus, Cania albicans an schericha coli. It was observed that EtOAc extract exhibited higher antimicrobial activity than other extracts in the stem of Kin-pon whereas EtOH extract showed higher potency in antimicrobial activity than other extracts in the bark of Tha-khut. The antioxidant activity of ethanol and watery crude extracts of the samples was investigated by using DPPH free radical scavenging assay, resulting in the order of Tha-Khut bark (EtOH extract) (IC50 = 42.71 g/mL) Kin-pon stem (EtOH extract) Tha-khut bark (watery extract) Kin-pon stem (watery extract) in antioxidant activity. Antitumor activity screening by Potato Crown Gall (PCG) test revealed that the EtOH and H2O extracts of stem of Kin-pon and bark of Tha-khut possess the tumor inhibition. Furthermore, antiarthritic activity of the ethanol crude extracts has been studied according to their proteinase inhibitory action and inhibition of protein denaturation action. In antiarthritic activity, ethanol extract of bark of Tha-khut showed proteinase inhibitory action and inhibiion of protein denaturation, however that of stem of Kin-pon did not show activities. 2018