Research List

No.	Researcher	Title	Abstract	Year
2111	Yin Thuzar Thein	DETERMINATION OF EFFICIENCY AND ENERGY RESOLUTION OF SCINTILLATION DETECTOR IN 511-1332 keV ENERGY RANGE	The most radiation detection method is based on the gamma � ray Spectrometry measurement, which is widely used in different fields. To obtain accurate analytical results in an experimental research, quality control of the detection system is important. Detection efficiency and energy resolution of NaI(Tl) scintillation detector are fundamental parameters for detection system. In this work, detection efficiency and energy resolution of 2? x 2? NaI(Tl) detector were experimentally measured using 22Na, 60Co and 137Cs standard radioactive sources at the energy range of 511 keV to 1332 keV.	2022
2112	Pwint Yi Thein	STRUCTURAL, MICROSTRUCTURAL AND NON - OHMIC BEHAVIOUR OF ZnO BASED VARISTORS WITH FIVE ADDITIVE OXIDES	ZnO based varistors with 5 additive oxides Bi2O3, Cr2O3, Co3O4, MnO2 and Sb2O3 are prepared and characterized in this research work. Standard varistor processes, known as weighting, ball milling, mixing with distilled water, pre heat treatment, secondary ball milling, seiving, sintering, pressing into circular shape disc, electroding and reheating processes are carried out to obtain the varistors with desired stoichiometric compositions. XRD technique is used to examine the structural features of prepared varistors. It is obvious that a little change of lattice dimensions is obtained. But there are no significant change of hexagonal, wurtzite ZnO structure after addition of additive oxides. Microstructural features of prepared varistors are characterized with the help of SEM. From the SEM images, it is noticed that irregular micro grains are uniformly distributed and there are no cracks. Further, average grain size slightly increases with increasing composition " x " in prepared varistors. Non - ohmic behaviour of prepared varistors are studied by using the high voltage DC power supply. From the ln V vs. ln I variations, non linearity factor, threshold voltage and leakage current are estimated. It is observed that non linearity factor slightly increases as composition " x " increases, on the other hand, threshold voltage and leakage current decrease when the composition " x " is raised. The transition metal oxides are involved in formation of interface states and deep traps in host matrix ZnO and both of which are contributed to high - non ohmic behaviour. Additive oxides, used in this study are known to be non - linearity enhancers and inducers. Threshold voltage is affected by the numbers of grain boundaries across the series between the two electrodes and inversely proportional to grain size. In this study, average grain size slightly increases with composition " x " in prepared varistors and that leads to lower the threshold voltage. The higher the non - linearity factor affects the lower the leakage current and the better the performance of varistor. It can be concluded that, prepared varistors can be used as transient surge voltage protection device.	2022
2113	Wint Shwe War Hlaing	DATA SENDING FROM ONE ESP BOARD TO MULTIPLE ESP BOARDS VIA ESP_NOW PROTOCOL	In this research, the data such as temperature and humidity from one ESP board is transferred to the other two ESP boards using ESP_NOW protocol. ESP_NOW is one of the connectionless communication protocols. It can transfer data in the form of short packet transmission. Multiple devices can talk to each other in ESP_NOW protocol. In this research, data are transferred from one-to-many boards. One ESP32 board functioned as the data sender while two other ESP32 boards are used as receivers. ESP8266 boards or Wemos boards can be also used instead of ESP32 boards. DHT 11 sensor is used to obtain the data of temperature and humidity. The messages from the sender are visualized in a serial monitor or PuTTY. The receiving data are displayed on the I2C LCD as well as on the serial monitor or PuTTY. The proper data transferring range is also measured.	2022
2114	Win Win Yee	PREPARATION AND STRUCTURAL PROPERTIES OF PbMnO3 CERAMICS BY SOLID STATE SINTERING METHOD	Analar grade PbO and MnO2 are weighted by the stoichiometric compositions, (1 - x) PbO + (x) MnO2, where x = 0.10, 0.15, 0.20, 0.25 and 0.30 respectively. Two starting materials, PbO and MnO2 are mixed and grinded by agate mortar for each 3 hrs. Then, the mixture are heat treated at 500�C for each 3 hrs. After that, the mixture are grinded again by agate mortar. Finally, the mixture are heat treated at 700�C for each 3 hrs. All heat treatment schedules are solid state sintering processes. XRD technique is used to examine the structural properties and phase formation of the ceramic samples. From the XRD analyses, the variations of dopant concentrations with the structural properties are studied. In addition, dielectric properties of the ceramics samples are also investigated.	2022
2115	Nyunt Win	ELECTRICAL PROPERTIES OF P(Py-2FPy)-ZnO COMPOSITE FILMS BY FOUR-POINT PROBE METHOD	This work focuses on the investigation of electrical properties of organic-inorganic nanocomposite films. Poly (pyrrole-2formyl pyrrole)-zinc oxide (P(Py-2FPy)-ZnO) composite films are fabricated by ex-situ chemical copolymerization through spin coating technique. Organic copolymer P(Py-2FPy) films were prepared by chemical copolymerization. For the inorganic components, ZnO nanoparticles were synthesized by room temperature solution method. P(Py-2FPy)-ZnO composite films with different concentrations of ZnO nanoparticles are fabricated in order to investigate the effects of ZnO contents on the electrical properties of films. The structural properties of copolymer and composite films were characterized by Ultraviolet-visible (UV-Vis) spectroscopy. The electrical properties of composite films including the sheet resistivity and conductivities of the composite films are measured by four-point probe method. Finally, the results of sheet resistivity and conductivity of composite films depending on concentration of ZnO nanoparticles are discussed. It was found out that the conductivities of composite films were increased with increasing the concentration of ZnO nanoparticles.	2022
2116	Yu Yu Aye	DETECTION OF MYXOSPOREAN PARASITES INFECTED IN THE KIDNEYS OF CIRRHINUS MRIGALA (HAMILTON, 1822)*	Cirrhinus mrigala, Mrigal carp was sampled monthly and examined myxosporean parasitic infection in kidneys of fish, over 12 months of study period. Myxobolus sp. under the phylum Cnidarian was recorded. Spores of Myxobolus sp. elongated and ellipsoid in valvular view, measurement 11.6�m�1.1�m in length and 7.6�m�0.8�m in width. The highest prevalence of Myxobolus sp. infection were recorded in August (82%) with highest mean intensity of infection (3) when the fish was one year old. Among the infected fish, only 16.7% of infected fish showed cysts formation on the kidneys through the study period. The histology slides of infected tissues were examined under light microscope to understand the histopathological changes of infested tissues. Histopathological changes such as abnormalities of convoluted tubules, dilation of blood vessels, hypertrophy and deformities of glomerulus, and congestion of blood cells caused by Myxobolus infection were observed. Dilation in the capillaries and vacuolar degeneration in the epithelium of renal tubules were observed. The infested kidney tissue showed the prominent circular vacuolar spaces filled with damaged cells necrosis in the tissue. To improve quality fish fry production and successful harvesting, therefore, management practices and pond hygiene should be adopted in nursery operation systems and grow-out ponds.	2022
2117	San San Htay	SOME BEHAVIORAL ACTIVITIES OF GALLINULA CHLOROPUS (COMMON MOORHEN) IN MEIKTILA UNIVERSITY CAMPUS	In the study period from January 2019 to December 2019, five behavioral activities of Common Moorhen were studied under four different diurnal periods. Concerning different diurnal periods, the relative percentage of time spent on locomotion and foraging was highest in the early morning. Grooming and reproductive behavior were highest in the late morning. The relative percentage of time spent resting behavior was highest in the mid-day. The time spent on locomotion varied among four different diurnal periods (P<0.05). Grooming activity differed among four different diurnal periods (P<0.05). Diurnal time spent on foraging activity varied among four different diurnal periods (P<0.05). No significant differences were found in resting activity in the time blocks of the day (P>0.05). Reproduction activity was not varied in the time blocks of the day (P>0.05). Throughout the study period, the dominant behavior was foraging and the contrary was reproduction. The next to foraging was locomotion and grooming because after the feeding peak in a place they usually change feeding place to search for more foods which increases their movement. Moving peak at next hour of foraging and feeding peak could be the reason for this. The minimum activity throughout the study period was reproductive behavior. Although Common moorhen breed all year, it breeds three broods in one year during the study period were recorded. Thus reproductive behavior among the behavioral activities was minimized. Among five behavioral activities of Common Moorhen throughout the study period was varied (P<0.05).	2022
2118	Chaw Su Hlaing	A FAUNISTIC SURVEY ON THE GASTROINTESTINAL PARASITES OF SOME MARKETABLE BIRDS IN MEIKTILA TOWNSHIP, MANDALAY REGION	Local resident around Meiktila environs enjoy selling wild birds as protein sources at Pauk Chaung markets of Meiktila Township, Mandalay Region. In the present study, some specimens of birds were purchased from Pauk Chaung market, Meiktila Township and freshly dead specimens were transported to laboratory of Zoology Department, Meiktila University. The goal of research investigated helminth species that harboured in the gastrointestinal tracts of five marketable bird species. Helminths collected as alive or dead and lactophenol was used as cleaning agent. Parasites were identified by using morphometric measurements and morphological descriptions. During the study period fifty gastrointestinal tracts from five species of birds were examined. Thirty-two birds out of 50 examined birds, showed infestation with eight species of cestodes, four species of nematodes and one species of acanthocephalans. The highest infected rate was observed in cestodes (51.16%), followed by nematodes (46.88%), and acanothocephalans (1.96%). The prevalence of helminths was (50.09%) in small intestine, however single helminths was incidence in the oesophagus plus crop and proventriculus plus gizzard. Not a single trematode was encountered throughout the study period. A high percentage of heiminthiasis was observed in the studied birds.	2022
2119	Tin Win Kyi	TAXONOMIC STUDY ON TWENTY-THREE SPECIES OF FAMILY ASTERACEAE FROM KANBALU AND KATHA DISTRICTS*	The taxonomic studies on the family Asteraceae from Kanbalu and Katha Districts in Sagaing Region were undertaken. In the present study, 23 species belonging to 15 genera of family Asteraceae were collected, studied and identified during December 2019 to October 2020. One species each from the genera Acilepis, Cosmos, Dichrocephala, Elephantopus, Gnaphalium, Parthenium, Tithonia, Sonchus, two species from genera Acmella, Blumea, Conyza, Pseudognaphalium, Sphaeranthus and Youmgia, three species from the genus Emilia were collected. From various habitats. Homogamous discoid capitula are found in 8 species. Heterogamous capitula are found in 15 species. Among them, 10 species possess disciform capitula and 5 species were radiate capitula. The characteristics of the family and detail descriptions of individual species are described with relevant photographs.	2022
2120	Su May Naung	MITOTIC CHARACTERS OF ZEA MAYS L. cv. SHAN PYAUNG AND LAY TAN PYAUNG IN SHAN STATE	The two cultivars of Zea mays L., Shan pyaung and Lay tan pyaung were observed to determine the karyotype analysis. These samples were supported by Seed Bank; Department of Agricultural Research, Nay Pyi Taw, Yezin. The somatic chromosome number of studied cultivars was 2n=20. The karyotype formulae were varied, 1 ST +1 SM* + 1 SM + 7 M was found in cv. Shan pyaung and 10 M in cv. Lay tan pyaung. A pair with secondary constriction or satellite submedian chromosome was observed in chromosome number 1 (SM1) of cv. Shan pyaung. In cv. Shan pyaung, the longest chromosome with 4.71 �m and the smallest chromosome with 2.18 �m, while the 4.40 �m of longest chromosome and 2.25 �m of smallest chromosome were observed in cv. Lay tan pyaung. The two studied cultivars were significantly different in morphology, karyotypic formula, chromosome group and size. The present study was elucidated to understand the number, morphology of chromosomes, and also beneficial for further research in cytogenetics concern with Zea mays L.	2022

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Myanmar Academy of Art & Science List of Research