In recent years, local Thai rice has been sharp-rising demands for consumers with high purchasing power who are willing to pay for nutritious grains and specialty rice. Khao Leb Nok (Bird’s Claw Rice) is traditional southern variety with high nutritious and popular rice grown in the south of Thailand. This study was done to investigate the isotopic compositions ($\delta$13C, $\delta$15N and...
The aim of this research is to study relation between Enso index and the change of rainfall in Thailand. The data used in this research was Oceanic Nino Index (ONI) from National Oceanic and Atmospheric Administration (NOAA), which is used to indicate ENSO event, and rainfall data from Meteorological department. The periods of rainfall data used one 1983 to 2012, in 4 regions (North, South,...
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This research aims to produce charcoal briquettes from Canarium Sabulatum (Canarium Sabulatum: tapioca starch) at the ratio of 8:2 and from Xylia Xylocarpa at the ratio of 7:3 (Xylia Xylocarpa: tapioca starch). The method that is used in this research is a cold press process by using a screw extruder that is connected with a 3.5 horsepower electrical motor. The finished...
Phrae Basin is located in the north of Thailand by condescending manner Basin along the north to south. A total catchment area of the basin is about 18,000 km2. During rainy season, it has been some problem about flooding almost every year. Moreover, drought problem has been suffered in dry season. The groundwater resources were used for supporting agriculture activities such as growing rice...
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The purpose of this research is to build a charcoal extruder by using a bicycle. The extruder is 0.73 meters in width, 1.75 meters in length, and 1.30 meters in height. It operates in the same way as pedaling a bicycle. The ingredients to make charcoals consist of charcoal powder, tapioca starch, and water at a ratio of 7:3 which is 7 parts of charcoal powder and 3 parts of tapioca...
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This study is comparison between fuel briquette from electric machine using motor and hand machine using bicycle. The briquettes from electric machine are 3.5 HP. The material was wooden charcoals which were grinded by grinder. The ratio was 2,000 g of grinded charcoal and 500 g of Tapioca flour (4:1) and water. Those components were mixed to made briquettes by electric motor and...
This study aims to express a comparison of spatial analysis of rainfall between meteorology radar of Northern Royal Rainmaking Operations Center, Department of Rainmaking and Agricultural Aviation and meteorology radar from Northern Meteorological Center, Meteorological Department and Ground station by Northern Meteorological Center of Chiang Mai. Geographic Information System (GIS) has used...
Organic chiangda tea it’s contains antioxidants which help to maintain balance in the body. The purpose of this research was to study the effects of drying temperature drying on the change of moisture content of organic chiangda tea drying. Additionally, the heat transfer coefficient and effective moisture diffusivity of organic chiangda was investigated under hot air convection drying....
The objective of this study was to development of germinated parboiled Thunya-sirin glutinous rice product under modified greenhouse dryer. The research was to determine on compared of physical properties of rice such as (color values (L, a , b *), cooking index, texture,sensory evaluation and chemical analysis in the free radical scavenging activity of the germinated parboiled Thunya-sirin...
The characteristics of clouds and its relationship with solar radiation are analyzed in this paper. In this research SR03 pyranometer was install at SKRU in Songkhla (7.09 N, 100.36 E) in order to measure solar radiation and clouds data from Songkhla TMD. The results from a six-month period (16 January 2017 – 30 June 2017) showed the relationship of clouds type and solar radiation, low...
The research as study to elemental quantity in particulate matter (PM10) at community where near factory as source found analysis of PM10. Which PM10 smaller sizes than of 10 µm from soil, rock, ash from leaf and ash from bagasse, respectively. PM10 were collected from around area and were pumped into filter paper by personal pump machines. PM10 were weighted by four point digital balance as...
Hot air drying is one of the simplest drying methods with low investment and operating costs. In this work, energy consumption and quality attributes for drying postharvest of dragon fruit (Hylocereus undatus) were studied. Energy consumption, moisture content, color and sensory evaluation were measured for drying with a hot air dryer. Drying experiments of freshly dragon fruit were conducted...
The estimation of the attenuation coefficient of solar radiation in the atmosphere were used solar radiation data on a cloudless day. The data were collected from four measuring stations located in Chiang Mai, Ubon Ratchathani, Bangkok, and Songkhla during the years 2011-2015. Then, the relationship between the attenuation coefficient from solar radiation data and the surface data (air...
Angstrom-Prescott model, H=H$_0$ [a+b(s/S)], was estimated solar radiation for 11 meteorological stations in Thailand. The empirical coefficients (a,b) were calculated by using the least square model. Statistical values, Root mean square error (RMSE) and Correlation, were examined the estimated solar radiation with the measuring. The empirical coefficients were interpolated by using geographic...
The 5x5 resolution Non-Hydrostatic Regional Climate Model (NHRCM) data from Meteorological Society of Japan is used to evaluate the south-west monsoon season that affects to Thailand during mid-May until mid-October in each years. Bulk-type cloud microphysics, Kain-Fritsch convective scheme, Mellor-Yamada-Nakanishi-Niino level 3 PBL scheme, clear-sky radiation scheme and Hirai-Ohizumi land...
This research fabrication hydrogen generator and effects of hydrogen gas from aluminum and hydrogen production the reaction between activated aluminum and water has been investigated. The effect of different parameters such as water aluminum ratio, CNT and the activation of NaOH into the aluminum particles and pellets nanotubes/aluminum composite with pressure ratio. Reactor hydrogen...
The elemental compositions measurements of the geological samples using portable X-ray fluorescence (pXRF) technique in the laboratory were studied. The influences of the grain size and the moisture content of the samples on the pXRF analysis were also investigated. The pXRF was used to determine the major (Al, Ca, Fe, K, Mg, Si and Ti) and minor (Mn, Nb, Pb, Rb, Sr, Th and Zr) elements in the...
The heat generation from the radioactivity of 238U 232Th and 40K of rocks in Thung Nui hot spring, Satun Province Southern of Thailand were study. The results of this research were used the develop of hot spring for ability renewable energy. The rocks sampling were collected outcrop nearly hot reservoir area. After sample grinded the radioactivity value of 226Ra 232Th and 40K were measured by...
Phosphate fertilizers contain uranium and thorium isotopes due to impurities in the phosphate rock used for fertilizer manufacture. Long term application can significantly accumulate and reach undesirable concentrations in agricultural soils. The presented study determined the 238U and 232Th in the four cultivated fields, one forest reference site and five phosphate fertilizers collected from...
Good drying system is evaluated by its efficiency in removing the moisture content of products to a certain level and at the same time decrease the quality degradation that occurs in drying process. The objective of this study was to investigation effective moisture diffusivity and activation energy on convective hot air drying assisted extraction of dragon fruit slices. Drying experiments...
Radon is a human carcinogen and a serious public health problem. High radon inhalation for long periods can increase the risk of lung cancer. There are many studies in Thailand focused on the radon hazard posed in the home. However, no report of its level in school for children is observed. Children have been reported to have greater the risk than adults for certain types of cancer from...
Chiangda herbal tea is an herb from Thailand that has a long and varied history in traditional medicine, it has been used in ayurvedic medicine for several centuries as a safe and natural way to help regulate sugar metabolism. The objective of this study was to evaluate the influence of drying of Chiangda herbal tea with modified greenhouse dryer. Drying experiments were performed at an air...
The objective of this study was to describes the development of a three-dimensional (3-D) mathematical model, which was used to during drying of germinated parboiled Thunya-sirin glutinous rice product under dryer. The three-dimensional mathematical models were solved numerically using the finite element method; additionally the mathematical model was validated by comparing the simulated...
Biomass pelletization is the basically technique to improve raw biomass properties which tend to provide the enhancement of durability and energy density. There are plentiful of raw biomass resources around the world which divided into two groups; woody and non-woody, that has individual advancement. The present study is the evaluation of woody pellet quality which made from part of common...
To understand the hydrological regime of the surface water in Kanu Woralaksaburi district, Kamphaeng Phet province, the rainwater and surface water were analyzed on the isotopic variability of hydrogen (δ 2H) and oxygen ( δ18O) collected over 3 years from 2015-2017. Surface water evaporation was verified on the basis of the isotope composition results. Based on a total of 213 rainwater...
CsPbBr3 perovskite films were prepared by using two-step method and using as an active material in the hole-free transport materials for perovskite solar cells. The CsPbBr3 perovskite films were coated on the F-SnO2 (FTO) conductive substrate by the spin coating technique. To prepare CsPbBr3 perovskite film by the two-step method, firstly, the PbBr2 film was coated on the FTO substrate by spin...
Thailand was located on way though of tropical cyclone were formed in South China Sea or Pacific ocean and move to northeast of Thailand. The prevail storm in Thailand often downgraded to tropical depression. Northern Thailand has a tropics climate into three seasons. Rainy (May – October), Winter (October – February) and Summer (March – May). Averages rainfall around 1,230 mm/year received by...
This paper analyses a case study of 27-day recurrent geomagnetic storms (RGSs) and the ionospheric F-region over Peruvian, Ascension Island, and Port Stanley during vernal equinox in 2006. The RGSs are categorized into High-Intensity Long-Duration Continuous AE Activity (HILDCAA) and non-HILDCAA cases. The solar wind plasma, Ionosonde, and magnetometer data are used. The results revealed that...
High levels of the fine particlate matter in the air is one of the reasons that affect the respiratory and health problems to human and animals. This research aims to study and analyze the source locations of the fine Particulate Matter (PM), particularly PM1, PM2.5 and PM10 measured at the Lampang Rajabhat University (LPRU) using the optical particle counter scattering technique during...
Stable isotopes including 13C, 15N and 18O of local Thai rice samples were carried out using elemental analyzer isotope ratio mass spectrometry (EA-IRMS). Thai rice samples, Khaowong sticky rice, Pakaumpul local rice, and Jek Chuey Sao Hai rice were cultivated from Kalasin, Surin, Saraburi provinces, respectively. In this study, we report the stable isotope ratio of rices for the isotopic...
This research aims to study and analyze the sources of particulate matter (PM) in Lampang which is measured by the Pollution Control Department (PCD) at 4 stations: 1) Department of Meteorology Phrabat, 2) Health Promotion Hospital Ban Soppad, 3) Bandong District Administrative Organization and 4) Mae Moh Provincial Waterworks Authority. Unusual periods of high PM were analyzed using multiple...
The wave energy is an alternative energy type. The energy quantity obtained from wave depended on many parameters such as the shape of floater, the wave height and the mechanism of energy transformation. Understandings in the effect of these parameters are necessary for wave energy utilization. Therefore, this research designed and constructed the floater testing set (FTS) for study the effect...
Weather Radio Detection and Ranging or Weather Radar is an equipment used for detecting the position and direction of atmospheric movement. Weather Radar was calculated the time travel of electromagnetic wave which sent and received to the objects. The radar reflectance could be estimated amount of water vapor in the cloud, but it was not exact value of surface rain water. Therefore, to...
Topography can affect climate. Different topographies have different climates. Rainfall in each area varies by topography. Northern Thailand has been chosen as a study area due to its various topographies such as ridge, flat, plain and valley. This research studies reflectivity data and rainfall rate.
Z-R relationship is a relationship between a radar reflectivity (Z) and a rainfall rate (R)....
The objectives of this research were to study silk corn drying using microwave oven technique and to find out the appropriate thin layer equation for predicting the drying kinetic of silk corn. To achieve these purposes, experiments were conducted on drying electric power of microwave oven 300, 500 and 700 W. The effects of drying conditions on moisture ratio, drying rate , humanity absorption...
Study the number of sunspots from the National Oceanic and Atmospheric Administration; NOAA and events of earthquake from Meteorological Department Thailand. Determine the relationship between astronomical and geological. The solar storm will occur and lost is solar cycle about 11 years, whereas events of earthquake will occur continuously. It may not be possible to indicate the earthquakes...
A magnitude 6.3 earthquake, the biggest instrumentally recorded earthquake in Thailand, occurred in Chiang Rai Province on 5 May 2014 and caused wide damage in the affected area. The earthquake generated numerous aftershocks that could portray the location of the fault plane beneath the ground. In this work, we conducted integrated geophysical surveys consisting of 2D seismic reflection and 2D...
The monitoring indoor climate, outdoor temperature and electric energy consumption of an air-conditioning system was collected via the internet network and was analysed for the correlation between the outdoor temperature and electric consumption for energy management. Moist air properties were employed to setup the correlating equation that can be used to predict the energy consumption of the...
Soil compaction is one of the serious problems in crop production. It has occurred under stress in the soil, which induced by agricultural machines. Therefore, it is necessary to characterize stress in the soil so as to predict soil compaction. The stress state transducer is a device to derive the stresses in the soil. The purpose of this laboratory work is to study the effect of granular...
A soil gas radon probe with a radon detector (RAD7) were studied and developed for investigating radon irregularity to determine the location of active faults which can result in earthquakes. The 2 types of gas probe (A and B) were designed with the diameter of 1, 2, 1.7, 2.5, and 4.5 cm and the length of 50, 100, and 150 cm to embed into the soil. These probe were taken to test with the 27...
N. Thangprasert*, S. Suwanarat, P. Anusasananan and S. Boonprasit
Department of Physics, Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand.
*E-mail: menipont@gmail.com
Abstract. Temperature is one factor affecting the yields of rice which is the main food crop of Thailand. Therefore in this research we investigate the variability in the frequency of temperature over...
