Hasil Pencarian  ::  Simpan CSV :: Kembali

"ABSTRAKSaat ini teknologi nuklir berkembang dengan baik di Indonesia dan pemanfaatannya baik di bidang kesehatan, pertanian, peternakan, industri dan energi digunakan sepenuhnya untuk kesejahteraan seluruh masyarakat Indonesia. Dalam pengembangan dan pemanfaatan teknologi nuklir tentu harus mempertimbangkan dan meminimalisir efek bahaya dari radiasi nuklir, baik untuk pekerja yang berada dilingkungan instalasi nuklir maupun bahaya kontaminasi lingkungan disekitar instalasi nuklir. Untuk itu kegiatan pemantauan, pendeteksian dan pengukuran radiasi mutlak diperlukan. Umumnya kegiatan pemantauan, pendeteksian dan pengukuran radiasi dilakukan dengan perangkat deteksi nuklir. Pada penelitian kali ini dilakukan metode alternatif pengukuran, analisis dan identifikasi unsur radioaktif dengan teknik laser induced plasma spectroscopy LIPS . Penggunaan teknologi LIPS dipilih karena LIPS adalah suatu teknik analisis sampel secara in situ, kualitatif dan kuantitatif yang cepat, dan hampir tanpa preparasi sampel. Analisis dan identifikasi unsur radiaoaktif dilakukan dengan menembakkan laser pulsa NdYAG Q-Switch 355 nm, 10 Hz, durasi pulsa 5.5 ns, f = 100 mm, dengan variasi energi 5.5 mJ - 140 mJ dan dengan variasi tekanan udara 4 Torr ndash; 1 atm pada sampel material radioaktif alamiah atau Naturally Occurring Radioactive Material NORM dengan metoda ablasi laser yang dilanjutkan dengan metoda spectral plasma analisis. Berdasarkan penelitian yang telah dilakukan, secara kualitatif teknik LIPS mampu mengidentifikasi adanya unsur radioaktif Uranium U dan Thorium Th yang terdapat pada sampel uji dengan energi laser optimum sebesar 107 mJ dan secara kuantitatif didapatkan nilai prediksi konsentrasi unsur Uranium sebesar 155 ppm dengan persentase error 11.3 dan nilai batas deteksi sebesar 7.89 ppm, nilai prediksi konsentrasi unsur Thorium sebesar 124 ppm dengan persentase error 8 dan nilai batas deteksi sebesar 12.4 ppm. Dengan kata lain teknik LIPS secara inheren sangat cocok dan sangat memungkinkan digunakan sebagai teknik pengukuran, analisis dan identifikasi keberadaan unsur radioaktif.

---

ABSTRACTNuclear technology is currently well developed in Indonesia and its use in the field of health, agriculture, industry and energy is completely used for the welfare of all the people of Indonesia. In the development and utilization of nuclear technology should certainly consider and minimize the effects of nuclear radiation hazards, both for the workers who are in the environment of nuclear installations and the danger of contamination of the environment around nuclear installations. Therefore monitoring activity, detection and measurement of radiation is absolutely necessary. Generally the monitoring activity, detection and measurement of radiation carried by the nuclear detection devices. In this study, alternative methods of measurement, analysis and identification of radioactive elements is carried out by using laser induced plasma spectroscopy LIPS . The use of LIPS technology is selected since LIPS is a technique in situ sample analysis, qualitative and quantitative fast, and almost no sample preparation. Analysis and identification of the radioactive element is carried out by firing laser pulses NdYAG Q Switch 355 nm, 10 Hz, pulse duration of 5.5 ns, f 100 mm, with a variation of the energy 5.5 mJ 140 mJ and with variations in air pressure 4 Torr 1 atm in a sample of Naturally Occurring Radioactive Material NORM with laser ablation method, followed by plasma spectral analysis method. Based on the research that has been done, LIPS technique is qualitatively able to identify the presence of radioactive elements, i.e. Uranium U and thorium Th contained in the test sample with a laser energy optimum of 107 mJ and quantitatively obtained predictive value of elemental concentrations of Uranium of 155 ppm along with 11.3 of percentage error and 7.89 ppm of detection limit value, also the predictive value of the elemental concentration of thorum of 124 ppm along with 8 of percentage error and 12.4 ppm of detection limit value. In other words, LIPS technique is inherently very suitable and it is possible to use as a measurement technique, analysis and identification of the presence of radioactive materials."

"ABSTRAKTelah dilakukan studi pemisahan thorium dari uranium dengan kromatografi pertukaran kation Dowex 50W dan optimasi parameter elektrodeposisi sebagai preparasi sumber alfa. Kedua metode tersebut digunakan pada analisis isotop thorium dengan spektrometer alfa untuk penentuan umur yellow cake hasil penambangan oleh Pusat Teknologi Bahan Galian Nuklir PTBGN , komersil Cogema , dan limbah pengolahan batuan fosfat PT Petrokimia Gresik PKG . Berdasarkan penentuan koefisien distribusi thorium dan uranium pada resin Dowex 50W diketahui bahwa kondisi pemisahan thorium dari uranium terbaik dilakukan dengan menggunakan resin dowex 50W-X8 dengan HNO3 0,25 M, uranium dielusi menggunakan HNO3 1 M dan thorium dielusi menggunakan HNO3 6 M. Parameter elektrodeposisi thorium yang optimum yaitu menggunakan larutan elektrolit 1 M, dengan arus 0,4A selama 105 menit dengan recovery sebesar 50,25 . Dari hasil analisis kadar thorium dalam sampel yellow cake menggunakan spektrofotometer UV-Vis secara simultan dengan pengompleks arsenazo-III, diperoleh kadar thorium sebesar 141,499 ppm dalam sampel yellow cake PTBGN, 199,574 ppm dalam sampel yellow cake Cogema, dan 354,268 ppm dalam sampel yellow cake PKG. Hasil pencacahan planset dari elektrodeposisi larutan efluen sampel yellow cake Cogema diketahui thorium yang terdapat dalam sampel yellow cake adalah 230Th yang merupakan anak luruh 230U, bukan thorium alam 232Th dan anak luruhnya 228Th , sehingga yellow cake Cogema tidak dapat ditentukan umurnya. Hasil ektrodeposisi thorium dari sampel yellow cake PTBGN dan PKG belum diperoleh baik seperti yang diharapkan yaitu terbentuk lapisan deposit thorium yang berwarna putih, akan tetapi terdapat lapisan berwarna hitam pada permukaan planset, diduga masih terdapat unsur pengotor selain uranium dalam larutan efluen.

---

ABSTRACTThe study of thorium separation from uranium with ion exchange chromatography using Dowex 50W resin and optimization of thorium electrodeposition parameter as alfa source preparation have been done. Those method is used for thorium isotopic analysis with an alpha spectrometer to determine the age of yellow cake mined from Kalan PTBGN , commercial Cogema , and the phosphate rock processing waste PT Petrokimia Gresik PKG . Based on the determination of the coefficient of distribution of thorium and uranium in on Dowex 50W, is known that the best condition of the separation of uranium thorium is Dowex 50W X8 resin with 0.25 M HNO3, uranium can be eluted using 1M HNO3 and thorium can be eluted using 6 M HNO3. The optimum parameters of thorium electrodeposition are using 1 M sodium acetate as electrolyte solution, with current 0,4 Ampere for 105 minutes with 50,25 recovery. From the analysis of thorium in yellow cake samples using UV Vis spectrophotometer simultaneously with complexing agent Arsenazo III, yellow cake PTBGN contain 141.499 ppm of thorium, yellow cake Cogema contain 199.574 ppm of thorium, and yellow cake PKG contain 354.268 ppm of thorium. From the alpha spectrometer spectrum of Cogema yellow cake effuent planset, known that Cogema yellow cake contain the 230Th which is not natural thorium, but the 234U decay product, so the age of Cogema yellow cake cannot be determined. The electrodeposition results from other yellow cake have not been served well as expected, it should formed deposits of thorium were white layer, but there is a black layer on planset surface, maybe there is still impurities other than uranium contained in solution effluents."

"ABSTRACTAn comprehensiove study has been carried out for the study and extension of lases induce shock wave plasma spectroscopy (LISPS) application to non metalic soft and hard samples. For this purpose, a series of experiments were conducted to investigate the dynamical process taking place in the laser plasma generated by a high power and short pulse laser irradiations on a non metal soft and hard samples it was found that in the case of non metal soft sample, the ablated atoms failed to induce a visible plasma at the surface of the target however, it became possible, after a few laser shots depending on the target layer thickness, to generate the sock wave plasma emitting the characteristic spectral line of the target material.Another related phenomenon studied in this experiment is the pre-irradiation effect pbserved on a non metal hard sample such as quartz sample, which was characterized by absence of secondary plasma at athe initial shots. The disappearance of this effect at a later stage was found to be connected with the appearance of a crater of appropriate depth on the sample surface created by iniatial repeated irradiations on the sample surface. The plasma produced thereafter exhibited typical features of a secondary plasma. Further experiment employing aaratificial ring crater on the sample surface has eliminated the pre-irraduation effect completely, and has thus demonstrated that it is the confinenement effect of the crater which was solely responsible for the generation of secondary plasma from the non metal hard tearget. This conclusion is ini confrormation with the shock wave proposed earlier.These experimental studies have thus considerably substantiated our understanding of the process of secondary plasma generatuion. In turn, this result helps to improve the quality and extend the scope of LISPS applications in the future"

"ABSTRACTAn comprehensiove study has been carried out for the study and extension of lases induce shock wave plasma spectroscopy (LISPS) application to non metalic soft and hard samples. For this purpose, a series of experiments were conducted to investigate the dynamical process taking place in the laser plasma generated by a high power and short pulse laser irradiations on a non metal soft and hard samples it was found that in the case of non metal soft sample, the ablated atoms failed to induce a visible plasma at the surface of the target however, it became possible, after a few laser shots depending on the target layer thickness, to generate the sock wave plasma emitting the characteristic spectral line of the target material.Another related phenomenon studied in this experiment is the pre-irradiation effect pbserved on a non metal hard sample such as quartz sample, which was characterized by absence of secondary plasma at athe initial shots. The disappearance of this effect at a later stage was found to be connected with the appearance of a crater of appropriate depth on the sample surface created by iniatial repeated irradiations on the sample surface. The plasma produced thereafter exhibited typical features of a secondary plasma. Further experiment employing aaratificial ring crater on the sample surface has eliminated the pre-irraduation effect completely, and has thus demonstrated that it is the confinenement effect of the crater which was solely responsible for the generation of secondary plasma from the non metal hard tearget. This conclusion is ini confrormation with the shock wave proposed earlier.These experimental studies have thus considerably substantiated our understanding of the process of secondary plasma generatuion. In turn, this result helps to improve the quality and extend the scope of LISPS applications in the future"

"This book is a comprehensive source of the fundamentals, process parameters, instrumental components and applications of laser-induced breakdown spectroscopy (LIBS). The effect of multiple pulses on material ablation, plasma dynamics and plasma emission is presented. A heuristic plasma modeling allows to simulate complex experimental plasma spectra. These methods and findings form the basis for a variety of applications to perform quantitative multi-element analysis with LIBS. These application potentials of LIBS have really boosted in the last years ranging from bulk analysis of metallic alloys and non-conducting materials, via spatially resolved analysis and depth profiling covering measuring objects in all physical states: gaseous, liquid and solid. Dedicated chapters present LIBS investigations for these tasks with special emphasis on the methodical and instrumental concepts as well as the optimization strategies for a quantitative analysis. Requirements, concepts, design and characteristic features of LIBS instruments are described covering laboratory systems, inspections systems for in-line process control, mobile systems and remote systems. State-of-the-art industrial applications of LIBS systems are presented demonstrating the benefits of inline process control for improved process guiding and quality assurance purposes."

"Jenis pneumonia virus baru ditemukan pada 31 Desember 2019 yang berasal dari Wuhan, Cina yang diberi nama penyakitnya sebagai Coronavirus Disease 2019 (COVID-19). COVID-19 terutama menyerang sistem pernapasan yang dapat  menyebabkan gangguan pemenuhan oksigen ditandai dengan sesak napas dan penurunan saturasi oksigen. Masalah keperawatan utama yang ditemukan yaitu besihan jalan napas tidak efektif. Karya ilmiah akhir ners (KIAN) ini bertujuan untuk menjabarkan hasil analisis asuhan keperawatan dengan menggunakan penerapan teknik pursed lips breathing terhadap peningkatan saturasi oksigen pada klien COVID-19 di ruang High Care Unit RS Universitas Indonesia. Pengukuran evaluasi dilakukan dengan menggunakan Pulse oximetry yang menunjukkan rata-rata peningkatan saturasi oksigen dari 94.75%  menjadi 96.75% selama lima hari perawatan. Sebagai  kesimpulan, pursed lips breathing diberikan untuk membantu mengatasi ketidakefektifan bersihan jalan napas dengan cara meningkatkan pengembangan alveolus pada setiap lobus paru sehingga tekanan alveolus meningkat, membantu mendorong secret pada jalan  napas saat ekspirasi dan dapat menginduksi pola napas menjadi normal. Oleh karena itu, hasil praktik ini dapat dijadikan acuan praktik keperawatan pada pasien COVID-19 dengan gangguan pemenuhan oksigenasi.

 

---

A new type of viral pneumonia was discovered on December 31, 2019 from Wuhan, China, which was named as Coronavirus Disease 2019 (COVID-19). COVID-19 primarily attacks the respiratory system that can disruption fulfillment of oxygen characterized by shortness of breath and decreased oxygen saturation. The main nursing problem found is that the airway is not effective. The purpose of this scientific work to describe the results of nursing analysis by using application of pursed lips breathing to increase oxygen saturation in COVID-19 client in High Care Unit Universitas Indonesia Hospital. Measurement evaluation was conducted using Pulse oximetry which showed an average increase in oxygen saturation from 94.75% to 96.75% over five days of treatment. In conclusion, pursed lips breathing is given to help overcome the ineffectiveness clearance the airway by increasing the development of alveoli on each lung lobe so that the pressure of alveoli increases, helping to push the secret on the airway during an expiratory and can induce a pattern of breath into normal. Therefore, the results of this practice can be used as a reference for nursing practice in COVID-19 patients with disruption fulfillment of oxygen."