Research List

No.	Researcher	Title	Abstract	Year
1021	Naung Naung Oo	BRACHIONID ROTIFER OF YE RIVER MOUTH IN SOUTHERN MON COASTAL WATER	Studies on diversity of brachionid rotifers were conducted at Ye River Mouth (Lat. 15� 04? N and Lat. 15� 12' N, Long. 97� 46' E and Long. 97� 48' E) in southern Mon coastal water from January to December 2018. Mon coastal water rotifers are least studied and authenticated records are not available for sufficing the data on their biodiversity. Rotifers were collected from brackish water to know their species diversity. A total of 12 species of branchionid rotifers identified during this study are Brachionus angularis Gosse, 1851, B. calyciflorus (Pallas, 1766), B. caudatus Barrois & Daday, 1894, B. diversicornis (Daday, 1883), B. donneri Brehm, 1851, B. falcatus (Zacharias, 1898), B. forficula Wierzejski, 1891, B. murrayi (Fadeew, 1925), B. plicatilis (Mu ller, 1786), B. quadridentatus Hermann, 1783, B. rotundiformis (Tschugunoff, 1921) and B. urceolaris (Mu ller, 1773). This is a primary record on brachionids of euryhaline water of Ye River Mouth. The detailed description of the rotifers recorded during the study in southern Mon coastal water is presented for substantiating the taxonomic relevance of the study.	2020
1022	Zar Ni Ko Ko	LENGTH-WEIGHT RELATIONSHIP AND CONDITION FACTOR OF SOME COMMERCIAL FISH SPECIES FROM KYAIKKHAMI FISH LANDING CENTER, MON COASTAL AREA	The study was conducted to analyze the length-weight relationship and condition factor of some commercial fish species from Kyaikkhami Fish Landing Center, Mon Coastal Area during June, 2018 to March, 2019. In present study period, a total of 873 fish species in size ranging from 20.2cm to 49cm for Tenualosa ilisha, from 20.6cm to 49.3cm for Tenualosa toli, from 24.8cm to 45.9cm for Scomberomorus guttatus and from 16.5cm to 30cm for Setipinna tenuifilis was recorded. In present findings, the exponential forms of equations derived between total length and total weight for T. toli was W=0.1223TL2.2272 (r=0.9262), for T. ilisha was W=0.0094TL3.001 (r=0.9582), for S. guttatus was W=0.138TL2.1396 (r=0.9161) and for S. tenuifilis was W=0.138TL2.1396 (r=0.9161). The �b� values of length-weight relationship of T. toli, S. guttatus and S. tenuifilis were observed to be 2.2272, 2.1396 and 1.1262 indicating negative allometric on species. Otherwise T. ilisha was 3 which indicated isometric in nature. Moreover, the mean condition factor of all of fish species was 0.95�0.16, 0.95�0.12, 0.69�0.13 and 1.09�0.43, indicating that its growth has been more or less normal (k<1or k>1).	2020
1023	Myo Min Tun	STUDY ON THE FISHERY STATUS OF COACH WHIPRAY, HIMANTURA UARNAK AT TWO FISH LANDING SITES OF MON STATE	The coach whipray Himantura uarnak (Forsskal, 1775) was collected from two fish landing sites namely Zeephyuthaung and Ahlayt coastal areas, Mon State during April 2018 to March 2019. Average highest and lowest landings were 85.5 kg and 11.3 kg in the months of July 2019 and in December 2018 at Zeephyuthaung and the highest volume was 102 kg in April and the lowest was 14.3 in June at Ahlayt respectively. During the study period, Himantura uarnak contributed only 338.3 kg in April at Ahlayt followed by 307.6 kg in February at Ahlayt and 307.5 kg in April and 307 kg in July at Zeephyuthaung, and the least is 31.5 kg in June at Ahlayt of the year wise total landing volume of sharks and rays respectively. H. uarnak was found in throughout of the year in study period. There is no comprehensive data of fish landing in Mon State.	2020
1024	Yin Yin Htay	STUDY ON SOME PHYTOPLANKTON OF MAUNG MA KAN BEACH, LONGLONE TOWNSHIP, TANINTHARYI REGION, SOUTHERN MYANMAR	Results indicated 47 genera consisted of 88 species of phytoplankton in the samples from Maung Ma Kan water at 2018. Among these, 41 genera was represented by 76 species were diatoms of Bacillariophyta and 6 genera with 12 species were dinoflagellates of Dinoflagellata. In Premonsoon, Bellerochea horologicalis, Chaetoceros pseudocurvisetum, Proboscia alata, Rhizosolenia robusta and Syringidium americanum dominantly occurred. Among these, the most abundant was Proboscia alata, 262 cell/L and it was 15 % of the total abundance of phytoplankton. In Monsoon, Bacteriastrum varians, Bacteriastrum hyalinum, Lauderia annulata, Thalassionema frauenfeldii and Thalassionema nitzschioides were abundantly recorded. Among these, the most maximum species was Bacteriastrum varians, 265 cell/L and it was 17 % of the total abundance of phytoplankton. In Postmonsoon, Aulacodiscus argus, Bellerochea horologicalis, Palaria sulcata, Proboscia alata and Thalassionema nitzschioides were dominant. Among these, the most dominant species was Bellerochea horologicalis, 261 cell/L and it was 43 % of the total abundance of phytoplankton. Moreover, the maximum total abundance was recorded as Premonsoon (1720 cell/L) followed by Monsoon (1518 cell/L) however Postmonsoon (604 cell/L) was observed.	2020
1025	Myint Myint Khine	CARDENOLIDE GLYCOSIDES FROM Streptocaulon tomentosum WIGHT & ARNOTT (Nrif;p*HkeD) (ASCLEPIADACEAE) in MYANMAR	This paper describes the isolation and comparative studies on NMR spectra of cardenolide glycosides from Streptocaulon tomentosum Wight & Arnott (Asclepiadaceae). Nine cardenolides were isolated from the roots of Streptocaulon tomentosum. by column chromatography and identified by NMR spectroscopy. They are 17?-H-periplogenin, 17?-H-periplogenin-?-D digitoxose,17?-H-periplogenin-?-D cymarose, 17?-H-periplogenin-?-glucosyl-(1-4)-2-O-acetyl-digitalose, 17?-H-periplogenin, 17?-H-periplogenin-?-D digitoxose, 17?-H-periplogenin-?-D cymarose, 17? -H-digitoxigenin, and 17 ?-H-digitoxigenin-?-D-digitoxoside. Comparative studies on NMR spectra of cardenolide glycosides were carried out. Six cardenolides isolated from Streptocaulon tomentosum were tested for their antiproliferative activity in vitro against MCF-7 (human breast cancer cell line) and L 929 (mouse fibroblast cell line). Among these six cardenolides, 17?-H-periplogenin-3-O-?-D-digitoxoside and 17?-H-periplogenin-3-O-?-D-cymaroside exhibit significant antiproliferative activity (IC50 values, < 1?M) against MCF-7. Four cardenolides were examined for their cellular viability in the tumor cell and U 937 (human leukemic cell line) at concentrations 100 ?M, 10 ?M, and 1 ?M. All these four cardenolides show the induction of apoptosis at 100 ?M and 10 ?M in both cell lines.	2020
1026	Khin Mar Cho	DEGRADATION OF METHYLENE BLUE DYE IN AQUEOUS SOLUTION USING GREEN SYNTHESIZED NANO-SIZED ZnO PARTICLES	This research deals with degradation of methylene blue (MB) dye in aqueous solution using green synthesized nano-sized ZnO particles. The aim of this research is to prepare, characterize and study the degradation efficacy of green synthesized nano-sized ZnO particles. Leaves of Ma-yogyi (Calotropis gigantea L.) were collected from Kathitkan village in Aung Lan Township, Magway Region, Myanmar. Nano-sized ZnO particles were synthesized from zinc nitrate and zinc acetate sources using aqueous leaves extract of Ma-yo-gyi as a reducing agent via green synthesis. The green synthesized nano-sized ZnO particles were characterized by TG-DTA, XRD, SEM and TEM techniques. The effects of calcination temperature on the preparation and average crystallite size of particles were also studied. The green synthesized nano-sized ZnO particles have hexagonal phase with average crystallite size of (24-34) nm. Supported SEM and TEM images by the degradation efficacy of green synthesized nano-sized ZnO particles on MB nethylene blue(MB) dye were studied via various parameters such as effect of pH (3, 4, 5, 6, 7 and 8), effect of contact time (0, 30, 60, 90, 120, 150 and 180 min) and effect of dosage of nanosized ZnO particles (0.02, 0.03, 0.04 and 0.05 g). Dye removal activity was highest at pH 7 using both of green synthesized nano-sized ZnO particles. From the contact time experiment, at the end of the reaction (after 180 min), MB dye removal efficacy was upto 80-85 % of its initial value. Degradation percent of MB dye solution increased gradually with an increase in dosage of nanosized ZnO particles.	2020
1027	Thet Su Min	EFFECT OF TRICHODERMA INOCULATED COMPOST IOFERTILIZER ON THE GROWTH AND YIELD OF BRINJAL	The present work deals with the study on the effect of Trichoderma inoculatedcompost biofertilizer on growth and yield of Brinjal (Solanum melongena). Tthe processing of compost biofertilizer was carried out by utilization of Trichoderma substrate (Yezin Isolate)based on farm waste bedding materials namely rice straw, cow dung and rice bran. Physicochemical properties of cow dung, rice straw and prepared compost biofertilizer were determined by conventional method and modern technique. Field experiment was conducted at Water Utilization Research Section, Department of Agricultural Research, Yezin and laid out in Randomized Complete Block (RCB) design with four treatments and five replications. Four treatments were T1 (chemical fertilizer), T2 (30% biofertilizer), T3 (chemical fertilizer with 30% biofertilizer), T4 (control without fertilizer). Analytical assays of the untreated soil and the prepared fertilizer treated soil were also carried out before sowing and after harvesting. The effect of prepared fertilizers on the growth of brinjal plant was studied on the basis of growth parameters and total yield were estimated. Among these treatments, T3(chemical fertilizer with 30% biofertilizer) was able to produce the highest yield of 8995.58 kg/ha compared with other treatments including control without fertilizer, the lowest yield of 6290.38 kg/ha. According to this study, 30% compost biofertilizer treatment produced the second highest yield of brinjal ( 7458.13 kg/ha).This study indicated that a combination treatment of biofertilizer and chemical fertilizer had significant effect on the yield and growth of brinjal. Therefore, Trichoderma inoculated compost can also be used as biofertilizer to reduce on chemical inputs in the perspective of sustainable agriculture and conservation of natural resources.	2020
1028	Aye Mya Nwe	SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITY OF SILVER-POLYVINYL ALCOHOL NANOCOMPOSITE FILMS	In this research work, silver nanoparticles were synthesized by using chemical synthesis. In chemical synthesis, trisodium citrate was used as reducing agent. Silver nanoparticles (SNP) were prepared by mixing different volume ratios of 1 % trisodium citrate solution and 1 mM AgNO3 solution (1:10, 2:10 and 3:10 v/v). The existence of SNP in colloidal solutions was confirmed by Tyndall effect and UV-visible spectroscopy. The UV-visible spectrum was revealed the formation of silver nanoparticles by exhibiting the typical surface plasmon absorption maxima at 415 nm. The silver nanoparticles were characterized by modern techniques such as XRD, FT IR, SEM and EDXRF analyses. In XRD analysis, it was found that average crystallite size of SNP powders are in the range of 36.5 nm to 41.7 nm and all the SNP-TSC had the crystalline nature. According to the XRD spectra of all prepared SNP-TSC, there was impurity peaks in the SNP-TSC 2 and SNPTSC 3 but no impurity peaks in the SNP-TSC 1. From the FT IR spectra of all prepared SNP-TSC, it was observed that a strong symmetrical stretch was observed in the range of 1400 cm-1 to 1200 cm-1 where major peaks at 1390-1380 cm-1 which showed the C-H stretching. SEM micrographs of all prepared SNP-TSC showed agglomeration and therefore larger particle size distribution. From EDXRF analyses, the main constituent element in the SNP-TSC1 is Ag (87.177 %). The different types of polyvinyl alcohol (PVA) film were prepared by using different concentrations (1 - 5 % w/v) of PVA to distilled water. The obtained PVA films were designated as PVA-1, PVA-2, PVA-3, PVA-4 and PVA-5. According to the mechanical properties, PVA-3 film was chosen as selected film. The selected PVA-3 film was characterized by SEM, FT IR and TG-DTA analyses. The PVA-SNP composite films were prepared by varying the volume ratios of 3 % (w/v) PVA solution and colloidal SNP-TSC 1 solution. According to the mechanical properties, PVA-SNP-3 was selected and characterized by SEM, FT IR, TG-DTA and EDXRF analyses. The antimicrobial activity of prepared PVA-SNP composite films were investigated using agar well diffusion method.	2020
1029	Zin Mar Win	STUDY ON THE SORPTION OF NATURAL DYES EXTRACTED FROM ACACIA AURICULIFORMIS A.CUNN. (MALAY-SHA-PADAUK) BARK ON COTTON AND ITS ANTIMICROBIAL ACTIVITIES	In this research work, the bark of Acacia auriculiformis A.cunn (malay-sha-padauk) was collected from Pyay Township, Bago Region. Physicochemical parameters of the raw bark powder such as moisture content, ash content, bulk density and pH content were determined. Natural dyes were extracted from the bark of malay-sha-padauk by different solvents (water, ethanol and methanol). The prepared natural dyes were characterized by FT IR, EDXRF and UV-Visible analyses. Relative abundances of elements in the extracted dye were analyzed by EDXRF which showed the chemical constituents of the element. The phytochemical tests of extracted natural dye were carried out. Furthermore, the antimicrobial activities of malay-sha-padauk dye were investigated by Agar Disc Diffusion method on six tested organisms. The maximum wavelength (?max) of dyes extracted with water, ethanol and methanol were 490 nm, 489 nm and 497 nm, respectively. Sorption properties of 1000 ppm natural dye solutions dyeing on cotton were studied at different temperatures (40, 50, 60, 70 and 80 �C) and contact time and pH (3, 4, 5, 6, 7 and 8) by UVVisible spectrophotometer at different wavelengths for the various extract of malay-sha-padauk bark. From the experiment, it was revealed that the optimum temperature of dyes were at 70 �C and the optimum condition of dyeing on cotton were contact time of 50 min and pH 6. At optimum conditions, natural dye solutions with different alum dosages dyeing on cotton were studied by using UV-Visible spectrophotometer and more effective mordant (alum) dosage of 0.1 g was achieved for the dyeing process. The dye sample solutions were prepared by mixing natural dye powder with alum, onion peel, jengkol peel and tea waste to improve colour strength of dyes. Natural dye solutions dyeing on cotton were studied under optimum conditions by using three mordanting methods (pre-mordanting, simultaneously mordanting and post-mordanting).The colour intensities of these dyeing cotton was determined by Reflection Transmission Color Densitometer.	2020
1030	Hnin Yu Win	MACROLIDE ANTIBIOTICS AND INDOLE ALKALOID PRODUCED FROM MARINE AND TERRESTRIAL BACTERIA	Chemical investigation of terrestrial bacteria Bacillus subtilis M 8 and marine-derived Streptomyces sp. B 8406 led to the identification of macrolide antibiotics, namely, macrolactin F (1) and borrelidin (3) respectively. Additionally, the strains delivered the precursor of indole alkaloid, tryptophan (2) and indole alkaloid, 6-prenyltryptophol (4) respectively. The structures of these metabolites were elucidated based on 1D and 2D NMR experiments and mass studies. Macrolactin F (1) showed weak antibacterial properties. Borrelidin (3) showed high activity against Escherichia coli, Candida albicans and Mucor miehei (T� 284) by causing inhibition zones of 25, 30 and 30 mm, at 40 ?g/ disk; it showed medium activity against Staphylococcus aureus, Streptomyces viridochromogenes (T� 57) and weak activity against Bacillus subtilis. It was also found to have an activity against Artemia salina of 93 %. Moreover, biogenesis of borrelidin (3) was discussed.	2020

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