scholarly journals KAJIAN KANDUNGAN RADIOISOTOP ALAM DALAM SAMPEL BATUAN DI DESA OBEN BAUN KUPANG BARAT DENGAN TEKNIK ANALISIS RADIOAKTIVITAS LINGKUNGAN

2018 ◽  
Vol 3 (2) ◽  
pp. 147-154
Author(s):  
Maria Selviana Tay ◽  
Albert Z. Johannes ◽  
Laura A. S. Lapono ◽  
Bartholomeus Pasangka
Keyword(s):  
Field Survey ◽  
Specific Activity ◽  
Mineral Deposit ◽  
Tolerance Limit ◽  
Nuclear Radiation ◽  
Contamination Level ◽  
East Part ◽  
Rock Samples ◽  
Activity Area ◽  
Mass Type

Abstrak Masalah pokok yang dikaji dalam penelitian ini adalah pemetaan dan analisis aktivitas jenis massa kandungan radioisotop dalam deposit mineral di Desa Oben Baun Kupang Barat. Tujuan Penelitian meliputi: menentukan kisaran cacah radiasi radioisotop alam di beberapa titik pengukuran di lapangan dan pengukuran di laboratorium, menentukan kisaran aktivitas jenis  massa (C) kandungan radioisotop dalam sampel batuan, memetakan sebaran cacah dan aktivitas jenis massa radioisotop pada luasan daerah  tertentu yang terjangkau survei di lapangan, dan mengestimasi tingkat kontaminasi radioaisotop pada lingkungan. Metode penelitian meliputi: observasi/ survei, mapping, sampling, analisis, interpretasi. Hasil-hasil penelitian: Kisaran cacah radiasi nuklir radioisotop di lapangan dan dilaboratorium dalam deposit mineral di Oben Baun Kupang Barat berturut-turut berkisar antara 15 cpm sampai dengan 93 cpm dan 28 cpm sampai dengan 92 cpm. Kisaran aktivitas jenis massa (C) kandungan radioisotop dalam 45 cuplikan sampel batuan di Oben Baun Kupang Barat berkisar antara 0,099 x 10-5 µCi/gram sampai dengan 0,316 x 10-5 µCi/gram. Sebaran atau distribusi kandungan radioisotop di Desa Oben Baun Kupang Barat yang dapat dijangkau survei terdistribusi lebih tinggi dari arah timur dan cenderung menurun ke arah barat. Distribusi tersebut masih cenderung tinggi ke arah utara di bagian timur lokasi survei. Kontaminasi radioisotop pada lingkungan masih tergolong kontaminasi rendah untuk radiasi alpha dan beta, dan secara umum cacah radiasi radioisotop di lapangan masih bersesuaian dengan  batas toleransi, walaupun perlu diwaspadai beberapa titik ukur dengan cacah radiasi melebihi standar. Kata Kunci: Radioisotop, Aktivitas Jenis Massa, Daerah Kontaminasi.                                                                        Abstract The main problem studied in this research was mapping and analizing of mass specific activity of radioisotope content in mineral deposit at Oben Village Baun West Kupang. The aims of research comprise of: to determine radiation counts range of natural radioisotope at several measurement points at field and Laboratory, to determine counts and massa specific activity range of radioisotope content in rocks sample,  to map distribution of counts and  mass specific activity on area which was reached of field survey, and to estimate contamination level of radioisotope on environment. The methods of research consists of: Observatlion/ surveying, mapping, sampling, analyis, and interpretation. The results of research: The counts range of nuclear radiation of radioisotope at field and laboratory in mineral deposit at Oben Baun West Kupang in succession revolved between 15 cpm up to 93 cpm and 28 cpm up to 92 cpm. The range of mass speciific activity of radioisotope content in 45 rock samples at Oben Baun West Kupang revolved berween 0,099 x 10-5µCi/gram up to 0,316 x 10-5 µCi/gram. The distribution of radioisotope content at Oben Village Baun West Kupang which can be reached survey higher distributed from east direction and inclined decrease to west direction. These distribution still high inclined to nort direction at east part of survey location. Radioisotope contamination on environment still classified low contamination for alpha and beta radaition, and generally radiation counts of radioisotope at the field still to be appropriated with tolerance limit, although was necessary waried several measurement points with radiastion counts exceed of standard.                      Keywords : Radioisotope, Mass Type Activity, Area Contamination.

scholarly journals KAJIAN KANDUNGAN RADIOISOTOP ALAM DALAM SAMPEL BATUAN DI DESA OBEN BAUN KUPANG BARAT DENGAN TEKNIK ANALISIS RADIOAKTIVITAS LINGKUNGAN

2018 ◽  
Vol 3 (3) ◽  
pp. 147-154
Author(s):  
Maria Selviana Tay ◽  
Albert Z. Johannes ◽  
Laura A. S. Lapono ◽  
Bartholomeus Pasangka
Keyword(s):  
Field Survey ◽  
Specific Activity ◽  
Mineral Deposit ◽  
Tolerance Limit ◽  
Nuclear Radiation ◽  
Contamination Level ◽  
East Part ◽  
Rock Samples ◽  
Activity Area ◽  
Mass Type

Abstrak Masalah pokok yang dikaji dalam penelitian ini adalah pemetaan dan analisis aktivitas jenis massa kandungan radioisotop dalam deposit mineral di Desa Oben Baun Kupang Barat. Tujuan Penelitian meliputi: menentukan kisaran cacah radiasi radioisotop alam di beberapa titik pengukuran di lapangan dan pengukuran di laboratorium, menentukan kisaran aktivitas jenis  massa (C) kandungan radioisotop dalam sampel batuan, memetakan sebaran cacah dan aktivitas jenis massa radioisotop pada luasan daerah  tertentu yang terjangkau survei di lapangan, dan mengestimasi tingkat kontaminasi radioaisotop pada lingkungan. Metode penelitian meliputi: observasi/ survei, mapping, sampling, analisis, interpretasi. Hasil-hasil penelitian: Kisaran cacah radiasi nuklir radioisotop di lapangan dan dilaboratorium dalam deposit mineral di Oben Baun Kupang Barat berturut-turut berkisar antara 15 cpm sampai dengan 93 cpm dan 28 cpm sampai dengan 92 cpm. Kisaran aktivitas jenis massa (C) kandungan radioisotop dalam 45 cuplikan sampel batuan di Oben Baun Kupang Barat berkisar antara 0,099 x 10-5 µCi/gram sampai dengan 0,316 x 10-5 µCi/gram. Sebaran atau distribusi kandungan radioisotop di Desa Oben Baun Kupang Barat yang dapat dijangkau survei terdistribusi lebih tinggi dari arah timur dan cenderung menurun ke arah barat. Distribusi tersebut masih cenderung tinggi ke arah utara di bagian timur lokasi survei. Kontaminasi radioisotop pada lingkungan masih tergolong kontaminasi rendah untuk radiasi alpha dan beta, dan secara umum cacah radiasi radioisotop di lapangan masih bersesuaian dengan  batas toleransi, walaupun perlu diwaspadai beberapa titik ukur dengan cacah radiasi melebihi standar. Kata Kunci: Radioisotop, Aktivitas Jenis Massa, Daerah Kontaminasi.                                                                        Abstract The main problem studied in this research was mapping and analizing of mass specific activity of radioisotope content in mineral deposit at Oben Village Baun West Kupang. The aims of research comprise of: to determine radiation counts range of natural radioisotope at several measurement points at field and Laboratory, to determine counts and massa specific activity range of radioisotope content in rocks sample,  to map distribution of counts and  mass specific activity on area which was reached of field survey, and to estimate contamination level of radioisotope on environment. The methods of research consists of: Observatlion/ surveying, mapping, sampling, analyis, and interpretation. The results of research: The counts range of nuclear radiation of radioisotope at field and laboratory in mineral deposit at Oben Baun West Kupang in succession revolved between 15 cpm up to 93 cpm and 28 cpm up to 92 cpm. The range of mass speciific activity of radioisotope content in 45 rock samples at Oben Baun West Kupang revolved berween 0,099 x 10-5µCi/gram up to 0,316 x 10-5 µCi/gram. The distribution of radioisotope content at Oben Village Baun West Kupang which can be reached survey higher distributed from east direction and inclined decrease to west direction. These distribution still high inclined to nort direction at east part of survey location. Radioisotope contamination on environment still classified low contamination for alpha and beta radaition, and generally radiation counts of radioisotope at the field still to be appropriated with tolerance limit, although was necessary waried several measurement points with radiastion counts exceed of standard.                      Keywords : Radioisotope, Mass Type Activity, Area Contamination.

Specific activity and hazards of Archeozoic-Cambrian rock samples collected from the Weibei area of Shaanxi, China

2005 ◽  
Vol 118 (3) ◽  
pp. 352-359 ◽  
Author(s):  
L. Xinwei ◽  
W. Lingqing ◽  
J. Xiaodan ◽  
Y. Leipeng ◽  
D. Gelian
Keyword(s):  
Specific Activity ◽  
Rock Samples

scholarly journals RADIATION MEASUREMENT OF RADIOISOTOPE IN MINERAL DEPOSIT AT SUBDISTRICT OF MIDDLE KUPANG WEST TIMOR ISLAND INDONESIA

2020 ◽  
Vol 5 (1) ◽  
pp. 78-86
Author(s):  
Bartholomeus Pasangka ◽  
Frederika Rambu Ngana
Keyword(s):  
Radiation Power ◽  
Three Dimensional ◽  
Mineral Deposit ◽  
Three Dimensions ◽  
Nuclear Radiation ◽  
Radiation Measurement ◽  
Potential Region ◽  
Background Count ◽  
West Timor ◽  
Accumulation Center

The general objective of this work was investigation of radioisotope distribution and accumulation center in mineral deposit at sub-district of Middle Kupang West Timor Island Indonesia. The purposes of research were: to map of radioisotope distribution in the mineral deposit, to estimate area of radioisotope accumulation center in the mineral deposit, to establish range of nuclear radiation counts in the center region of radioisotope content in mineral deposit. The general methods used in this research were observation, survey, mapping, analysis, and interpretation. Procedures detail of research consists of: observe and identify the potential region and plot gridding, calibrate equipment necessary, measure background count in around of survey location and nuclear radiation in the survey location, plot of three dimensions curve and contour after corrected by background count. Based on geology information or geology data (drilling data) three depth levels determined (about 20 m, 40 m and 60 m), Radiation powers were calculated for estimation of accumulation center of radioisotope in deposit mineral, and contour and three dimensions curves of radiation power of radioisotope in deposit mineral were plotted. Results: Based on three dimensional curves and contour map (radiation counts and radiation powers on three levels) of radioisotope in mineral deposit respectively was distributed on area 3.00 x 106 m2, and 1.56 x 104 m2. The interval of radiation counts of radioisotope in mineral deposit was 10 counts per minute-137 counts per minute. Keywords: Radiation, measurement, radioisotope, mineral, deposit

scholarly journals Assessment of the Contamination Level of a Podzolized Chernozem with Nuclides in a Long-term Land Use

2019 ◽  
Vol 65 (3) ◽  
pp. 128-135
Author(s):  
Hrygorii Hospodarenko ◽  
Ihor Prokopchuk ◽  
Olga Nikitina ◽  
Vitalii Liubych
Keyword(s):  
Winter Wheat ◽  
Specific Activity ◽  
Radioactive Isotopes ◽  
Spectrometric Analysis ◽  
Contamination Level ◽  
Wheat Grain ◽  
Previous Crop ◽  
Radioactive Nuclides ◽  
Composition Properties

Abstract Prolonged systematic application of mineral fertilisers contributes to increasing the yielding capacity of agricultural crops. However, it can lead to significant changes in the composition, properties and formation of agricultural soil regimes. The findings of the research have shown that the application of mineral fertilisers leads to the change of radioactive nuclides content in the soil. The research was conducted under conditions of a long-term stationary field experiment (Uman, Ukraine), using different rates of mineral fertilisers N45P45K45, N90P90K90 and N135P135K135. Soil samples (podzolized chernozem) were selected from the depths of 0 – 20, 20 – 40 and 40 – 60 cm. Specific activity of radionuclides was determined by the spectrometric analysis. Using experimental results we have demonstrated that under a long-term application (50 years) different rates of mineral fertilisers effect the specific activity of radioactive isotopes in the soil (226Ra, 232Th, 40K, 137Cs, 90Sr). The specific activity of radionuclides in a podzolized chernozem and in winter wheat grain was established. Winter wheat plants accumulated 232Th at the highest levels, but the use of fertilisers reduced it in a larger mass of the crop. The absorption of radioactive nuclides by winter wheat grain grown after peas and silage corn depending on fertilisation changed similar to growing it after clover as a previous crop. According to the data of specific activity of radioactive nuclides in the soil and winter wheat grain, the coefficient of their biological absorption was calculated.

scholarly journals INVESTIGASI KANDUNGAN RADIOISOTOP DALAM SAMPEL BATUAN DI MUARA SUNGAI SUMLILI KUPANG BARAT

2020 ◽  
Vol 5 (1) ◽  
pp. 11-18
Author(s):  
Yosefina Molo ◽  
Bartholomeus Pasangka ◽  
Jehunias Leonidas Tanesib
Keyword(s):  
Three Dimensional ◽  
River Estuary ◽  
River Mouth ◽  
Field Research ◽  
Survey Sampling ◽  
Nuclear Radiation ◽  
Mineral Deposits ◽  
Counting Range ◽  
Mass Activity ◽  
Mass Type

Abstrak Masalah pokok yang dikaji di penelitian ini adalah pemetaan dan analisis aktivitas jenis kandungan radioisotop dalam sampel batuan di muara sungai Sumlili Kupang Barat. Tujuan penelitian meliputi : menentukanrange cacah dan aktivitas jenis massa (C) kandungan radioisotop dalam sampel pasir  di muara sungai Sumlili Kupang Barat, mengestimasi tingkat kontaminasi radioisotop sesuai standar di sekitar muara sungai Sumlili, dan memetakan sebaran cacah radioisotop pada luasan daerah tertentu yang terjangkau survei di lapangan. Metode penelitian meliputi : observasi/survei, sampling, serta analisis dan interpretasi data. Kisaran cacah radiasi di lapangan, di laboratorium, dan nilai aktivitas jenis massa kandungan radioisotop dalam 52 sampel pasir dari lokasi penelitian dimuara sungai Sumili Kupang Barat secara berturut-turut adalah 19 cpm sampai dengan 60 cpm, 29 cpm sampai dengan 73 cpm, dan  0,107 x 10-5μCi/gram sampai dengan 0,269 x 10-5μCi/gram. Berdasarkan kontur dan kurva tiga dimensi radiasi cacah radioisotop dalam sampel pasir di lapangan dan di laboratorium serta kontur dan kurva tiga dimensi aktivitas jenis massa di muara sungai Sumlili Kupang Barat dapat diketahui bahwa sebaran kontaminasi radioisotop di muara sungai Sumlili Kupang Barat  lebih tinggi ke arah barat dan cenderung menurun ke arah timur. Hasil perhitungan aktivitas jenis massa kandungan radioisotop dalam sampel pasir di muara sungai Sumlili Kupang Barat, termaksud dalam kontaminasi rendah untuk radiasi alpha (α) dan beta (β), namun daerah ini perlu diwaspadai karna terdapat beberapa titik di lapangan, cacah radiasi nuklir kandungan radioisotop dalam deposit mineral cukup tinggi melebihi standar IAEA. Kata kunci : Radioisotop, Aktivitas Jenis Massa, Daerah Kontaminasi. ABSTRACT The main problem studied in this study is mapping and analyzing the activity of the types of radioisotope content in rock samples at the mouth of the Sumlili river in West Kupang. The research objectives included: determining the counting range and mass type activity (C) radioisotope content in the sand samples at the Sumlili River mouth in West Kupang, estimating the level of radioisotope contamination according to the standards around the Sumlili river estuary, and mapping the distribution of radioisotope counts in the area covered by surveys in field. Research methods include: observation / survey, sampling, and analysis and interpretation of data. The range of radiation counts in the field, in the laboratory, and the value of the type of mass activity of radioisotope content in 52 sand samples from the study locations in the West Kupang Sumili River are 19 cpm to 60 cpm, 29 cpm to 73 cpm, and 0.107 x 10-5μCi / gram up to 0.269 x 10-5μCi / gram. Based on the three-dimensional contour and curve of radiation from radioisotope counts in sand samples in the field and in the laboratory and three-dimensional contours and curves the activity of mass types in the Sumlili estuary of West Kupang can be seen that the distribution of radioisotope contamination in the Sumlili estuary of West Kupang is higher west and tends to decline to the east. The results of the calculation of the type of mass activity of radioisotope content in sand samples at the mouth of the Sumlili River in West Kupang, are referred to in low contamination for alpha (α) and beta (β) radiation, but this area needs to be watched out for there are several points in the field, nuclear radiation in mineral deposits quite high exceeding IAEA standards. Keywords : Radioisotopes, Mass Type Activities, Contamination Areas.

scholarly journals Determination of Aflatoxin M1 in Milk by ELISA Technique in Mashad (Northeast of Iran)

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
Ali Mohamadi Sani ◽  
Mohamad Khezri ◽  
Halime Moradnia
Keyword(s):  
Average Concentration ◽  
Tolerance Limit ◽  
National Standard ◽  
Aflatoxin M1 ◽  
Enzyme Linked Immunosorbent Assay ◽  
Contamination Level ◽  
Milk Samples ◽  
Maximum Tolerance ◽  
Elisa Technique

The aim of this study was to detect the amount of aflatoxin M1 (AFM1) in pasteurized milk samples in Mashad in northeast of Iran. For this purpose, 42 milk samples were collected from retail stores during fall 2011 and analyzed for AFM1 by enzyme-linked immunosorbent assay (ELISA) technique. All the analyses were done twice. Results showed presence of AFM1 in 97.6% of the examined milk samples by average concentration of 23 ± 16 ppt and contamination level ranging between 6 and 71 ppt. The concentration of AFM1 in all the samples was lower than the Iranian national standard and Food and Drug Administration limits (500 ppt), and, only in 3 (1.6%) samples, AFM1 concentration was more than the maximum tolerance limit (50 ppt) accepted by European Union and Codex Alimentarius Commission. According to our findings and previous studies, AFM1 contamination of milk is not a concern in this region, and the regional standard of AFM1 contamination in milk might be changed to lower than 100 ppt.

scholarly journals Assessment of nuclear radiation pollution in uranium mining-impacted soil

2019 ◽  
Vol 11 (22) ◽  
pp. 40-50
Author(s):  
Raad Obid Hussein Houmady
Keyword(s):  
Dose Rate ◽  
Gamma Ray ◽  
Specific Activity ◽  
Ground Surface ◽  
Absorbed Dose ◽  
Nuclear Radiation ◽  
Uranium Mine ◽  
Radiological Protection ◽  
Absorbed Dose Rate ◽  
Radium Equivalent Activity

Activities associated with mining of uranium have generated significant quantities of waste materials containing uranium and other toxic metals. A qualitative and quantitative study was performed to assess the situation of nuclear pollution resulting from waste of drilling and exploration left on the surface layer of soil surrounding the abandoned uranium mine hole located in the southern of Najaf province in Iraq state. To measure the specific activity, twenty five surface soil samples were collected, prepared and analyzed by using gamma- ray spectrometer based on high counting efficiency NaI(Tl) scintillation detector. The results showed that the specific activities in Bq/kg are 37.31 to 1112.47 with mean of 268.16, 0.28 to 18.57 with mean of 6.68 and 132.25 to 678.33 with mean of 277.49 for 238U, 232Th and 40K respectively. Based on these values, radium equivalent activity in Bq/kg and absorbed dose rate one meter above the ground surface nGy/h were calculated and found to be vary 52.72 to 1189.84 and from 25.02 to 553.01. The indoor and outdoor annual effective dose rate in mSv/y ranged from 0.12 to 2.71 and from 0.03 to 0.67 respectively. To evaluate the dangerous of the study area, the external (Hex) and internal (Hin) hazard indexes are calculated and found to be ranged 0.14 to 3.21 and from 0.24 to 6.22. For the purpose of assessing the seriousness of the study area, results were compared with the world wide average. This comparison indicated that the study area is not safe from the radiological protection point view.

The Morphology of the Rat Kidney Following Folic Acid Administration

1970 ◽  
Vol 28 ◽  
pp. 200-201
Author(s):  
Aline Byrnes ◽  
Elsa E. Ramos ◽  
Minoru Suzuki ◽  
E.D. Mayfield
Keyword(s):  
Folic Acid ◽  
De Novo ◽  
Specific Activity ◽  
Rat Kidney ◽  
Present Report ◽  
Intracellular Localization ◽  
Male Rats ◽  
Renal Hypertrophy ◽  
Electron Microscopic ◽  
Biochemical Alterations

Renal hypertrophy was induced in 100 g male rats by the injection of 250 mg folic acid (FA) dissolved in 0.3 M NaHCO3/kg body weight (i.v.). Preliminary studies of the biochemical alterations in ribonucleic acid (RNA) metabolism of the renal tissue have been reported recently (1). They are: RNA content and concentration, orotic acid-c14 incorporation into RNA and acid soluble nucleotide pool, intracellular localization of the newly synthesized RNA, and the specific activity of enzymes of the de novo pyrimidine biosynthesis pathway. The present report describes the light and electron microscopic observations in these animals. For light microscopy, kidney slices were fixed in formalin, embedded, sectioned, and stained with H & E and PAS.

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