Physicochemical and Biological Analysis of 99mTc-Glutathione Radiopharmaceuticals

99mTc-glutation (99mTc-GSH) radiopharmaceutical is available in the GSH lyophilized-kit in which ready to use directly after adding 99mTc radionuclide. In nuclear medicine, 99mTc-GSH diagnostic kit is a radiopharmaceutical commonly utilized for cancer diagnoses using imaging method. This paper described the physicochemical and biological characteristics as well as the quality of 99mTc-GSH diagnostic kit prepared from the GSH lyophilized-kit. The radiochemical purity was determined with thin layer chromatography (TLC) method, performed on a TLC-SG stationary phase with a mobile phase of a dried acetone and 0,9% of NaCl solution. Studies on the effect of volume and radioactivity of Na99mTcO4 solution to the radiochemical purity of 99mTc-GSH were carried out. The sterility of GSH-lyophilized kit and toxicity of 99mTc-GSH were also investigated. The stability test on GSH lyophilized kit and 99mTc-GSH in several storage conditions, as well as the plasma stability of 99mTc-GSH was performed. The analysis result showed that the GSH lyophilized-kit was sterile; the 99mTc-GSH was non toxic with 99.54 ± 0.01% of radiochemical purity and remained stable 5 hours either at room temperature or 4 oC. The volume more than 4 mL of Na99mTcO4 solution on the labeling of GSH could decreased the 99mTc-GSH radiochemical purity, while the radioactivity more than 20 mCi in 7 mL of volume extended the incubation time. In-vitro stability test of 99mTc-GSH in plasma showed that in the two hours of storage, the radiochemical purity decreased to 51.84 ± 2.52%, and until 5 hours of storage it did not change significantly. From the result, it can be concluded that the GSH lyophilized-kit was remained stable after 13 month of storage either at room temperature or at 4 oC with 99% of 99mTc-GSH radiochemical purity.Received: 16 January 2013; Revised: 23 August 2013; Accepted: 24 August 201

Karakteristik Radiofarmaka 99mtc-glutation

KARAKTERISTIK RADIOFARMAKA 99mTc-GLUTATION. Senyawa bertandateknesium-99m-glutation (99mTc-GSH) merupakan radiofarmaka yang digunakan dalam bidangkedokteran nuklir untuk diagnosis kanker dengan metode pencitraan. Karakteristik fisiko-kimiadan biologis suatu radiofarmaka memegang peranan penting dalam penyebaran sertapenimbunannya di dalam tubuh. Oleh karena itu, untuk menjamin keberhasilan penggunaanradiofarmaka perlu dilakukan pengujian sifat fisiko-kimia dan biologisnya. Pengujian kemurnianradiokimia dilakukan dengan kromatografi lapis tipis (TLC-SG) menggunakan aseton kering danNaCL 0,9% sebagai fase gerak. Muatan 99mTc-GSH ditentukan dengan metode elektroforesisdan lipofilisitasnya (P) diketahui dengan menentukan koefisien partisinya dalam pelarut organikair.Ikatan protein plasma ditentukan secara in-vitro dengan metode pengendapanmenggunakan larutan asam trikloro asetat (TCA) 5%. Di samping itu, dilakukan juga pengujianpengaruh besarnya radioaktivitas 99mTc terhadap stabilitas 99mTc-GSH serta stabilitas di dalamplasma secara in-vitro. Dari hasil percobaan diperoleh bahwa radiofarmaka 99mTc-GSHmempunyai kemurnian radiokimia 99,08 ± 0,26%; tidak bermuatan listrik (netral); lipofilisitas =0,03 ± 0,002; ikatan protein plasma sebesar 30,31 ± 0,04%. Penggunaan larutan Na99mTcO4sampai mencapai konsentrasi radioaktivitas 21 mCi/2 mL menghasilkan radiofarmaka 99mTc-GSH yang tetap stabil hingga 5 jam dengan kemurnian radiokimia ≥ 95%. Uji stabilitas 99mTc-GSH dalam plasma secara in-vitro menunjukkan bahwa kemurnian radiokimia menurun dengancepat pada penyimpanan satu jam pertama, yaitu sebesar 63,41± 4,86% dan kemurnianradiokimia antara 55 - 57 % bertahan hingga 5 jam penyimpanan

Efektivitas Ekstrak Biji Jintan Hitam (Nigella Sativa Linn.) Terhadap Infeksi Bakteri Streptococcus Agalactiae Pada Ikan Nila (Oreochromis Niloticus Linn.)

Black Cumin Seeds (Nigella sativa L.), commonly known as black seed, have been used in traditional medicine.Streptococcus agalactiae is a Gram-positive bacteria that causes the disease Streptococcosis in nile tilapia(Oreochromis niloticus L.). This study aims to find the bioactivity of black cumin seeds (N. sativa L.) againstbacterial pathogens in nile tilapia (O. niloticus L.). The research activities include preparation of samples blackcumin seeds (N. sativa L.), extraction with kinetic maceration method using solvents from different polarity (nhexane,ethanol and methanol), determination of antibacterial activity and minimum inhibition concentration(MIC) by agar diffusion method. The results of antibacterial activity against S. agalactiae of pathogenic bacteriashowed that the highest activity was performed by semi-polar extract ethanol (inhibition zone diameter of 15.33mm), followed by extract polar methanol with inhibition zone diameter of 12.67 mm. Extract non-polar nhexanedid not show any activities against the bacterial test. Determination of the minimum inhibitoryconcentration (MIC) of ethanol extract against S. agalactiae showed a value of 250 ppm

Profile of MIBI Liquid Phase Radiopharmaceutical for Myocardial Imaging

The 99mTc-MIBI radiopharmaceutical has been used innuclear medicine in Indonesia for myocardial imaging. BATAN researchers have mastered the technology to manufacture MIBI as a liophylized kit. A reformulation of MIBI radiopharmaceutical has been conducted to improve the stability of the kit especially in the liquid-phase kit. Basically, radiopharmaceuticals in liquid form are not different from the dry kit. However in the manufacturing of liquid-phase kit, lyophilization process was not done. To improve the stability of liquid kit, a reformulation of the components was conducted by using two separate vials (Formulation 2) and the characteristics were compared with the one-vial formulation (Formulation 1). The MIBI Formulation 2 consists of two vials, vial A containing 0.06 mg of SnCl2 2H2O and 2.6 mg Sodium Citrate 2H2O and vial B containing 0.5 mg of [Cu(MIBI)4]BF4, 1 mg of cysteine hydrochloride, and 20 mg of mannitol.The purposes of this study wereto determine the stability of two different formulations of MIBI as a liquid-phase kit, to compare their stability in different storage condition such as in refrigerator and freezer, and to compare the ratio of activities attained between target and nontarget organs after injection to animal model. As a diagnostic agent, MIBI was reconstituted with Technetium-99m as radionuclide tracer to 99mTc-MIBI labeled compound. The radiochemical purity of 99mTc-MIBI was determined by chromatography method using alumina thin-layer chromatography paper as the stationary phase and ethanol 95% as the mobile phase. The results showed MIBI Formulation 2 has a higher stability than Formulation 1. Formulation 2 also maintained a 96.68% radiochemical purity under 52-day storage and attained a target-to-nontarget activity ratio of 8.22.Received: 04 October 2014; Revised: 10 November 2015; Accepted: 25 November 201

Water Pollution from the Activity of Large-Ruminant Animal Quarantine Installation (AQI) in Its Receiving Water Body

Indonesia governs the post-entry observation through the Animal Quarantine Installation (AQI) as a precautionary measure to minimize the risk of the entrance and the spread of animal infectious organism and disease of import animals. However, wastes generated from their activities are potentially pollute the environment. This research aimed to evaluate the pollution from AQI activity on its receiving water body. The study was conducted at 5 companies as follow: PT. A, PT. B, PT. C, PT. D, and PT. E. The samples were taken from their wastewater and the river where the waste was discarded with two replications. Direct measurement was carried out in the field by using water quality equipment to analyze pH, temperature, DO, and TDS. For other analysis, samples collected were preserved in refrigerator at 4 °C before laboratory testing was carried out to minimize microbiological decomposition of solids. Pollution variabels were analyzed by analysis of variance test (ANOVA) with 95% confidence level followed by turkey test. The results showed that there was no difference in pollution from temperature, DO, TDS, TSS, COD, and ammonia variables from 5 companies. In contrast, two variables i.e., pH and BOD indicating the difference among 5 companies (P<0.05). In conclusion, the results of wastewater variables from large-ruminant AQI activity were generally exceeding the Quality Standard of Wastewater for cattle-farming. Thus there is a pollution of water bodies in the environment around AQI due to their activities

Exploring Women's Retirement Literature through Bibliometric Analysis Using VOSviewer

This paper aims to analyse the issue of women’s retirement (WR) literature through bibliometric analysis using VOSviewer, a programme for the visualisation of similarities (VOS). Publications focusing on women’s retirement were compiled from the Scopus database, with a total of 393 items spanning the years 1965 to 2021. The most prolific nations for retirement literature are the United States, United Kingdom, and Sweden, which reflects the affiliation analysis that correlates highly with published papers within specific institutions in those three countries. The issues were discussed within the context of social sciences, economics, econometrics, and finance, as well as psychology. This suggests an interlinking of women’s retirement with social and financial issues that might contribute towards psychological challenges for women. The most cited keywords, among others, are ‘retirement’, ‘women’ and ‘pension’, with thematic clusters being linked to ‘ageing’ and ‘health’. These could be linked to health problems that emerge because of ageing, and thus might be linked to the retirement wellbeing of women. The findings of this paper shed light on several implications that can be used as a guideline for researchers and act as a foundation before embarking on the emerging knowledge areas of women’s retirement

Secondary metabolites of the sponge-derived fungus Acremonium persicinum

This study reports the isolation and characterization of six new acremine metabolites, 5-chloroacremine A (4), 5-chloroacremine H (5), and acremines 0 (6), P (7), Q(8), and R (9), together with the known acremines A (1), F (2), and N (3) from the fungus Acremonium persicinum cultured from the marine sponge Anomoianthella rubra. The relative configuration of acremine F (2) was determined by analyses of proton coupling constant values and NOESY data, and the absolute configuration confirmed as (IS, 4S, 6R) by X-ray crystallographic analysis of the borate ester derivative 15. Acremines O, P, and R were each shown to be of 8R configuration by H-1 NMR analyses of MPA esters. The relative configurations suggested for acremines P and Q were each deduced by molecular modeling together with NOESY and coupling constant data. The (3)J(H-C) values in acremine P were measured using the pulse sequence EXSIDE, and the observed (3)J(H8-C4) of 5.4 Hz and small (3)J(H-C) values

Influence of Microstructural Effect on Microvickers Hardness Properties of SiO2-Na2O-CaO (SNC) Waste Based Glass-ceramic

There are a lot of waste materials consist of silicate based such as coal combustion ash, slag from steel production, fly ash, mud, as well as glass cullet or mixtures to produce glass-ceramics. This research work using clam shell (CS) ash and soda-lime-silica (SLS) waste glass powder for fabricating novel SiO2-Na2O-CaO (SNC) glass-ceramic. The samples were composed of SLS (50%), Na2CO3 (30%), and CS (20%) in weight percentage via conventional melt-quenching technique and solid-state sintering technique. The samples were investigated via X-Ray Diffractometer (XRD), Field emission microscope (FESEM), and microvickers hardness tester. The samples were sintered at 550-950 °C to investigate the influence of microstructural effect on microvickers hardness properties at applied force 0.5 and 1.0 kgf. The optimal Vickers hardness properties at sintering temperature 850 °C due to high crystallization of SiO2 phase from the residual glass and CaO content enhanced the viscosity flow, high compactness of particles arrangement and densification of sample

Isoprene hotspots at the Western Coast of Antarctic Peninsula during MASEC′16

Isoprene (C5H8) plays an important role in the formation of surface ozone (O3) and the secondary organic aerosol (SOA) which contributed to the climate change. This study aims to determine hourly distribution of tropospheric isoprene over the Western Coast of Antarctic Peninsula (WCAP) during the Malaysian Antarctic Scientific Expedition Cruise 2016 (MASEC′16). In-situ measurements of isoprene were taken using a custom-built gas chromatography with photoionization detector, known as iDirac. Biological parameters such as chlorophyll a (chl-a) and particulate organic carbon (POC) were compared to the in-situ isoprene measurements. Significant positive correlation was observed between isoprene and POC concentrations (r2 = 0.67, p < 0.001), but not between isoprene and chl-a. The hotspots of isoprene over maritime Antarctic were then were investigated using NAME dispersion model reanalysis. Measurements showed that isoprene mixing ratio were the highest over region of King George Island, Deception Island and Booth Island with values of ∼5.0, ∼0.9 and ∼5.2 ppb, respectively. Backward trajectory analysis showed that air masses may have lifted the isoprene emitted by marine algae. We believe our findings provide valuable data set of isoprene estimation over the under sampled WCAP

Influence of Microstructural Effect on Microvickers Hardness Propertiesof SiO2-Na2O-CaO (SNC) Waste Based Glass-ceramic

There are a lot of waste materials consist of silicate based such as coal combustion ash, slag from steel production, fly ash, mud, as well as glass cullet or mixtures to produce glass-ceramics. This research work using clam shell (CS) ash and soda-lime-silica (SLS) waste glass powder for fabricating novel SiO2-Na2O-CaO (SNC) glass-ceramic. The samples were composed of SLS (50%), Na2CO3 (30%), and CS (20%) in weight percentage via conventional melt-quenching technique and solid-state sintering technique. The samples were investigated via X-Ray Diffractometer (XRD), Field emission microscope (FESEM), and microvickers hardness tester. The samples were sintered at 550-950 °C to investigate the influence of microstructural effect on microvickers hardness properties at applied force 0.5 and 1.0 kgf. The optimal Vickers hardness properties at sintering temperature 850 °C due to high crystallization of SiO2 phase from the residual glass and CaO content enhanced the viscosity flow, high compactness of particles arrangement and densification of sample