scholarly journals PEMBUATAN DAN ANALISIS FISIKO-KIMIA RADIOISOTOP SKANDIUM-47 (47Sc) DARI BAHAN SASARAN TITANIUM OKSIDA ALAM

2015 ◽  
Vol 16 (2) ◽  
pp. 63
Author(s):  
Duyeh Setiawan ◽  
Titin Sri Mulyati
Keyword(s):  
Specific Activity ◽  
Chemical Characteristic ◽  
The Body ◽  
Chemical Characteristics ◽  
Oxide Material ◽  
Solution Ph ◽  
Gamma Energy ◽  
Physico Chemical ◽  
Clear Solution ◽  
The Ideal

Radioisotop skandium-47 (47Sc) memiliki waktu paruh 3,35 hari, pemancar energi beta, Eβmax 0,441 MeV (68 %) dan 0,601 MeV (32 %), serta pemancar energi gamma, Eγ 159 keV (68 %). Radioisotop 47Sc dihasilkan oleh iradiasi neutron cepat dari target titanium berdasarkan reaksi inti 47Ti (n, p) 47Sc. Metode pemisahan 47Sc menggunakan cara kromatografi kolom dengan matriks Dowex AG 50W-x4 dalam bentuk kation (H+), selanjutnya 47Sc dielusi dengan HCl 4 M. Radioisotop 47Sc digunakan dalam bidang kedokteran nuklir untuk radioterapi dengan metode pencitraan. Karakteristik fisiko-kimia suatu sediaan radioisotop mempunyai peranan penting dalam penyebaran dan penimbunan di dalam tubuh. Oleh karena itu, untuk menjamin keberhasilan penggunaan sediaan radioisotop 47Sc perlu dilakukan analisis fisiko-kimia yang meliputi kejernihan, pH, kemurnian radionuklida dan radiokimia serta stabilitasnya pada penyimpanan. Hasil penelitian menunjukkan bahwa radio-isotop 47Sc berupa larutan jernih dengan rumus kimia 47Sccl3, memiliki pH 2, konsentrasi radioaktivitas 1,086 ± 0,0314 mCi/mL, aktivitas jenis 2,60 mCi/mg Ti (End of Irradiation = EOI), kemurnian radionuklida lebih dari 98,5 %, kemurnian radiokimia 95,22 ± 0,83 % dan masih stabil selama 5 hari disimpan di temperatur kamar. Radioisotop 47Sc yang diperoleh memiliki karakteristik fisiko-kimia untuk digunakan dalam pengembangan radiofarmaka sebagai sediaan radioterapi. PREPARATION AND PHYSICO-CHEMICAL ANALYSIS OF RADIOISOTOPE SCANDIUM-47 (47Sc) FROM NATURAL TITANIUM OXIDE MATERIAL TARGET. Radioisotopes scandium-47 (47Sc) has a half-life of 3.35 day, the energy beta transmitter Eβmax of 0.441 MeV (68 %) and 0.601 MeV (32 %), as well as gamma energy transmitter, Eγ 159 keV (68 %). Radioisotope 47Sc is produced by fast neutron irradiation of the titanium targets based on nuclear reaction 47Ti (n,p) 47Sc. Separation methods of 47Sc was done using chromatography column with a matrix of Dowex AG 50W-x4 in a cation (H+) form, and 47Sc was eluted with 4 M HCl. Radioisotope 47Sc is used in nuclear medicine for radiotherapy with imaging methods. The physico-chemical characteristics of a radioisotope has an important role in the biodistribution and bioaccumulation in the body. Therefore, in order to assure the success of usage of radioisotope 47Sc, of physico-chemical characteristic is need to be analyzed which includes clarity of solution, pH, purity of radionuclide and radiochemical, stability in the storage. The results showed that the radioisotope 47Sc was a clear solution with a chemical formula of 47ScCl3, has pH of 2 with the concentration of radioactivity 1,086 ± 0,0314 mCi/mL, specific activity of 2.60 mCi/mg Ti (End of Irradiation = EOI), the radionuclide purity more than 98.50 %, radiochemical purity 95,22 ± 0,83 % and  stable after 5 days storage in room temperature. Radioisotope 47Sc that was produced has the ideal physico-chemical characteristics and can be used for the radiopharmaceutical development especially for radiotherapy.

scholarly journals IMPROVING PHYSICO-CHEMICAL CHARACTERISTIC AND PALATABILITY OF KING GRASS (Pennisetum hybrid) SILAGE BY INOCULATION OF Lactobacillus plantarum - Saccharomyces cerevisiae CONSORTIA AND ADDITION OF RICE BRAN

2017 ◽  
Vol 41 (1) ◽  
pp. 61 ◽  
Author(s):  
Ahmad Sofyan ◽  
Yantyati Widyastuti ◽  
Ristianto Utomo ◽  
Lies Mira Yusiati
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Lactic Acid ◽  
Lactobacillus Plantarum ◽  
Rice Bran ◽  
Chemical Characteristic ◽  
Chemical Characteristics ◽  
Yeast Saccharomyces Cerevisiae ◽  
Randomized Design ◽  
Physico Chemical ◽  
Addition Level

This study was conducted to determine effectiveness of inoculants consisted of lactic acid bacteria Lactobacillus plantarum (Lp) and yeast Saccharomyces cerevisiae (Sc) combined with addition of rice bran on the physico-chemical characteristics and palatability of king grass (Pennisetum hybrid) silage. The experiment was arranged on the factorial randomized design (3x3) consisting of the inoculants treatments (control, Lp, Lp+Sc) and the addition level of rice bran (0, 5 and 10%). The measured variables were physico-chemical characteristics i.e. colour, odour, pH, lactic acid, Fleigh points, and palatability of silage. Inoculation of Lp and Lp+Sc improved silage odour and reduced fungal contamination. Silage was treated by Lp+Sc and rice bran (5-10%) showed reduction of pH and an increase of lactic acid and Fleigh points. However, interaction between inoculants and rice bran treatment was not significance. Either inoculation or addition of rice bran tended to enhance the palatability of silage in cattle. It concluded that the addition of inoculants L. plantarum and S. cerevisiae with/without addition of 5-10% rice bran could improve the physico-chemical characteristics of silage and its palatability to ruminant.

scholarly journals Study of Hydrophytes in Some Lentic Water Bodies in West Bengal, India

1970 ◽  
Vol 16 ◽  
pp. 9-13 ◽  
Author(s):  
S. K. Das ◽  
D. Biswas ◽  
S. Roy
Keyword(s):  
Water Quality ◽  
Aquatic Plants ◽  
Aquatic Macrophytes ◽  
Trophic Status ◽  
West Bengal ◽  
Pond Water ◽  
Chemical Characteristic ◽  
Chemical Characteristics ◽  
Aquatic Weeds ◽  
Physico Chemical

The physico-chemical characteristics of water, aquatic weeds and bank flora of three water reservoirs located in Krishnagar city (longitude 88°33'E, latitude 23°24'N), West Bengal, India, were studied for a period of 24 months. Altogether 13 genera of aquatic macrophytes belonging to 10 families, and 24 plant species (bank flora) belonging to 16 families were identified in the present investigation. The physico-chemical characteristic of pond water was found to be altered due to these aquatic plants. We have found a general relationship between trophic status of a water body and the aquatic plants present there. We have also found the alteration of water quality due to presence of various aquatic plants. Key words: Physico-chemical characteristics, hydrophytes, macrophytes, bank flora, weeds. DOI: 10.3126/eco.v16i0.3467ECOPRINT 16: 9-13, 2009

scholarly journals Separation Of Radioisotope 113mIn Using Column Chromatography Based on Silica Gel Matrix

Molekul ◽  
2018 ◽  
Vol 13 (2) ◽  
pp. 162
Author(s):  
Duyeh Setiawan ◽  
M Basit Febrian ◽  
Yanuar Setiadi
Keyword(s):  
Silica Gel ◽  
Column Chromatography ◽  
Room Temperature ◽  
Nuclear Reactor ◽  
Radiochemical Purity ◽  
Solution Ph ◽  
Spectrometry Method ◽  
Chromatography Method ◽  
Gamma Energy ◽  
Clear Solution

Radioisotope indium-113m (113mIn) with half-life, T1/2 = 1.7 hours and gamma energy, Eg = 391 keV is suitable and meets the criteria as radiotracer in industry. 113mIn radioisotope was obtained from tin-113 decay (113Sn, T1 / 2 = 115 days) of 112Sn (n,g) 113Sn neutron activation in nuclear reactor. The process of separation of radioisotope 113mIn using column chromatography method based on silica gel matrix using 0.05 M HCI solution. Radionuclide and radiochemical purity tests were performed using the gamma-spectrometry method and paper chromatography. The final product specification in the form of 113mInCl3 is clear solution, pH 2, obtained yield of 81.83%, radionuclide purity of 90.22%, radiochemical purity of 91.61 ± 0,29% and stable for 3 days at room temperature.

scholarly journals Indigenous Slaughter Techniques: Effects on Meat Physico-Chemical Characteristics of Nguni Goats

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 858
Author(s):  
Zwelethu Mfanafuthi Mdletshe ◽  
Michael Chimonyo ◽  
Cletos Mapiye
Keyword(s):  
Rural Communities ◽  
Chemical Characteristic ◽  
Chemical Characteristics ◽  
Suprasternal Notch ◽  
Ph Values ◽  
Resource Limited ◽  
Physico Chemical ◽  
Slaughter Method ◽  
Shoulder Blade ◽  
Water Holding

To improve goat meat quality in rural communities, it is important to evaluate the effects of indigenous slaughter methods used by resource-limited farmers when performing traditional ceremonies on the meat physico-chemical characteristics. The current study assessed the effects of the meat physico-chemical characteristics of Nguni goats slaughtered with the transverse neck incision (TNI), suprasternal notch piercing (SNP) and the under shoulder blade piercing at the chest floor point of elbow (CFP) to the direction of the heart methods. Thirty Nguni weathers were randomly assigned to three slaughter treatments (10 goats/treatment). Musculus longissimus thoracis et lumborum (LTL) was sampled at post-mortem for physico-chemical characteristic measurements. Meat from wethers slaughtered with the SNP method had greater ultimate pH values than meat from wethers slaughtered with TNI and CFP slaughter methods. Wethers slaughtered with the SNP method had lower meat redness (a*), yellowness (b*), and chroma (C*) values than those slaughtered with TNI and CFP slaughter methods. Goat slaughter method did not affect meat drip loss, water holding capacity, cooking loss and shear force. Overall, Nguni wethers slaughtered with the TNI and CFP methods produced chevon with fresher meat appearance than those slaughtered using the SNP method.

QUALIDADE DAS ÁGUAS E NÍVEL TRÓFICO DA BACIA DO RIO PACIÊNCIA NA ILHA DO MARANHÃO, BRASIL

2019 ◽  
Vol 21 (2) ◽  
pp. 437-453
Author(s):  
Elna Lucilia Santos Corrêa ◽  
Karina Suzana Feitosa Pinheiro ◽  
Cláudio José Da Silva de Sousa ◽  
Luiz Jorge Bezerra da Silva Dias
Keyword(s):  
Water Quality ◽  
Trophic Status ◽  
The Body ◽  
Chemical Parameters ◽  
Public Supply ◽  
Physico Chemical ◽  
Great Availability ◽  
Del Rio ◽  
Fluvial Environments

O Brasil apresenta grande disponibilidade de água doce em seus mananciais. Fazendo parte desse recurso encontra-se, o rio Paciência, localizado na Ilha do Maranhão destacado pela sua importância local, principalmente por contribuir com suas águas para recarga dos mananciais subterrâneos, fonte de abastecimento público de vários bairros de São Luís, capital do estado. No entanto, este rio vem sofrendo comprometimento da qualidade de suas águas, consequência do processo de uso e ocupação dos espaços em sua bacia. Destacando-se como um dos principais problemas relacionados a qualidade de ambientes fluviais,  a eutrofização, que consiste no processo em que o corpo d’água adquire elevados níveis de nutrientes (fosfatos e nitratos), é um indicador determinante da qualidade da água. Neste sentido, o objetivo deste trabalho foi caracterizar a qualidade da água e do estado trófico na bacia hidrográfica do rio Paciência atráves dos parâmetros fisico-químico evidenciando os trechos mais comprometidos conforme os valores alcançados nas análises. Os resultados das análises foram comparados com a CONAMA No. 357/05 que indicaram uma situação preocupante quanto à qualidade da água no local de estudo.Palavras-chave: Qualidade de água; Eutrofização; Ilha do Maranhão. ABSTRACTThe Brazil has great availability of fresh water in its springs. Within these contexts, the Paciência River, located on the Island of Maranhão stands out for its local importance, mainly for contributing its waters to the recharge of the underground springs, source of public supply of several districts of São Luís, capital of the state. However, this river has been compromising the quality of its waters, a consequence of the process of use and occupation of the spaces in its basin. Highlighting as one of the main problems related to the quality of fluvial environments, eutrophication, which consists of the process in which the body of water acquires high levels of nutrients (phosphates and nitrates), is a determinant indicator of water quality. In this sense, the objective of this work was to characterize the water quality and trophic status in the Paciência river basin through the physico-chemical parameters, showing the most compromised stretches according to the values reached in the analyzes. The results of the analyzes were compared with CONAMA No. 357/05 which indicated a worrying situation regarding the quality of the water at the place of study.Keywords: Water quality; Eutrophication; Island of Maranhão. RESUMENBrasil tiene gran disponibilidad de agua dulce en sus manantiales. Parte de este recurso es el río Paciencia, ubicado en la isla de Maranhão, que destaca por su importancia local, principalmente porque contribuye con sus aguas a recargar las fuentes subterráneas, fuente de suministro público de varios barrios de São Luís, capital del estado. Sin embargo, este río se ha visto afectado por la calidad de sus aguas, como consecuencia del proceso de uso y ocupación de los espacios en su cuenca. Destacando como uno de los principales problemas relacionados con la calidad de los ambientes fluviales, la eutrofización, que consiste en el proceso en el que el cuerpo de agua adquiere altos niveles de nutrientes (fosfatos y nitratos), es un indicador determinante de la calidad del agua. En este sentido, el objetivo de este trabajo fue caracterizar la calidad del agua y el estado trófico en la cuenca del río Paciência a través de los parámetros fisicoquímicos, mostrando las secciones más comprometidas de acuerdo con los valores alcanzados en los análisis. Los resultados de los análisis se compararon con CONAMA N°. 357/05, que indicó una situación preocupante con respecto a la calidad del agua en el sitio de estudio.Palabras clave: Calidad del agua; Eutrofización, Isla Maranhão.

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