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"ABSTRAKDalam industri maritim, komponen kapal termasuk indutri pemasok. Galangan kapal hanya melakukan proses pemasangan saja tanpa memproduksi komponen kapal. Dengan adanya rencana dibangunnya Kawasan Industri Maritim Tanggamus diharapkan dapat meningkatkan industri perkapalan di Indonesia. Didalam penelitian ini, penulis menganalisa penempatan tata letak industri pemasok yang akan dibangun pada Kawasan Industri Maritim. Hasil dari penelitian ini berupa penempatan industri pemasok pada Kavling berupa industri apa saja yang termasuk dalam kavling yang akan dijadikan fabrikasi maupun distributor.

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ABSTRACTIn maritime industry, ship?s components are being produced in supplier industries. The shipyards only do the outfitting process without producing the ship components. By the plan of the development of Maritime Industrial Estate of Tanggamus, it is supposed to improve the performance of ship industries in Indonesia. In this research, writers analize the best placement layout of supplier industries that will be built in Maritime Industrial Estate. Results of this research is a supplier industries placement in the form of the industry Kavling what is included in a kavling which will be fabricated and distributors."

"The main focus of this article was to investigate the potential of natural zeolite adsorbent for the removal of CO2 and H2S in biogas produced from palm oil mill effluent (POME) in fixed-bed column adsorption. The effects of the flowrates and dosage of the adsorbent on the CO2 adsorption were also studied. The surface area of the adsorbent was determined using the Brunauer, Emmett, and Teller (BET) model, while the pore size distribution was calculated according to the Barrett, Joyner, and Halenda (BJH) model. The morphology of the adsorbent was determined by field emission scanning electron microscopy and energy dispersive x-ray (FESEM-EDX) analysis. Before and after purification, the biogas was analyzed by gas chromatography with a thermal conductivity detector and polydimethylsiloxane as a column. Biogas from the POME, via the anaerobic digestion process, produced 89% CH4 and 11% CO2. The surface and structure of the clinoptilolite zeolites was modified by a strong acid (1M HCl), strong base (1M NaOH), and calcination at 450°C, and the surface area of the natural zeolites was reduced up to 16%. The working capability of CO2 adsorption by the modified zeolites decreased with increasing flow rates (100, 200, and 300 mL/min) of the biogas, with levels of CO2 at 106,906, 112,237, and 115,256 mg/L. The removal of the CO2 in the biogas by using adsorbent dosages of 1.5, 2.0, and 2.5 g was 97,878, 97,404 and 93,855 mg/L, respectively. The optimum purification of the biogas occurred under the flow rate of 100 mL/min and adsorbent dosage of 2.5 g. The high working capability of the modified zeolites for the removal of CO2 in the biogas was a key factor, and the most important characteristic for the adsorbent. The results indicate that clinoptilolite zeolites are promising adsorbent materials for both the purification and upgrading of biogas."

"The aim of this study was to synthesize high luminescence materials containing the optimal combination of ternary europiumpicrate complex and matrices. The ternary europium-picrate-triethylene glycol (Eu-EO3-Pic) complex was doped in poly(methyl methacrylate), PMMA. The composites were impregnated in several matrices to form thin filmsvia spin coating technique. The microparticles of Eu-EO3-Piccomplex were prepared by reprecipitation-evaporation, then they were compared to analogous complex or microcomposite prepared by in-situ method. The Eu-EO3-Pic/PMMA microcomposites were characterized by fluorescence spectroscopy in acetone solution. The particle sizes distribution of microcomposites synthesized by reprecipitation-evaporation method (110.3 to 426.8 nm) were smaller compared to the microcomposites by in-situ method (641.7 nm). The PMMA was able to significantly enhance the fluorescence intensity of Eu-EO3-Pic microparticles. The fluorescence intensity of microcomposite by in situ-preparation was lower than that found in the microcomposites by reprecipitation-evaporation method. We also investigated the effect of different matrices on the photophysical properties. The effective intermolecular energy transfer from PMMA to the Eu-EO3-Pic complex would produce high sensitization efficiency. These microcomposites are very potential used as the emission material for organic light emitting devices."

"Solid sorbents based on graphite electrode waste and cerium oxide (ceria, CeO2) have been studied with regard to CO2 capture. The acid-base properties of cerium oxide produce a sorbent for the capture of CO2. The aim of the study is to evaluate the performance of CO2 capture using graphite/CeO2 composites at different weights of Ce(NO3)3.6H2O (0.5, 1 and 2 g), namely G0.5, G1 and G2, respectively. Volumetric adsorption studies of CO2 on graphite/CeO2 composites and ceria were conducted at various pressures (P) of 3, 5, 8, 15 and 20 bar, and temperatures (T) of 303, 308, 318 K. Graphite waste before modification (GBM), activated graphite waste (GA), and CeO2 for capturing CO2 were also investigated. By varying the two parameters (P and T), we found that the maximum adsorption capacities of CO2 at 303 K and 20 bar were 0.0713, 0.0316, 0.1574, 0.0987, 0.1137, and 0.0964 kg/kg respectively, for GBM, GA, G0.5, G1, G2 and CeO2. The highest adsorption capacity of CO2 was found in the G0.5 composite. The adsorption performance of CO2 using ceria was almost similar to the G1 composite. We found that CO2 adsorption capacity decreases with an increasing temperature from 303 to 318 K. It was concluded that ceria and composite graphite waste/CeO2 are stable and selective CO2 sorbents. The work allows us to synthesize a new sorbent which can be effectively applied for CO2 capture. The adsorption capacity of CO2 depends significantly on the active site and chemical modifier of the sorbents."

"In this research, we studied the preparation of nanochitosan from the addition of potassium persulfate as an initiator for monomer polymerization and monocarboxylic acid—namely acetic acid, lactic acid, and formic acid—to a chitosan solution. To obtain the dried form of chitosan nanoparticles, we investigated the effects of oven and spray drying systems toward the physicochemical properties and morphology of chitosan nanoparticles. Successfully prepared chitosan nanoparticles were characterized by Fourier transform infrared spectroscopy (FTIR), Field Emission Scanning Microscopy/Energy Dispersive X-ray Analysis (FESEM-EDX), and a particle size analyzer (PSA). The structures of nanochitosan prepared in different acids were quite similar based on the FTIR spectra. By increasing the concentrations of potassium persulfate, the yields of chitosan nanoparticles also increased. The concentration of potassium persulfate had a significant influence on the production of chitosan nanoparticles. The lowest concentration of potassium persulfate (0.6 mmol) did not produce an observable formation of chitosan nanoparticles. By using formic acid and potassium persulfate in various concentrations from 1.2–3.0 mmol, chitosan nanoparticles were obtained. A particle size distribution of chitosan nanoparticles was produced from a formic acid solution having a smaller size compared to others. The acidity effect of monocarboxylic acids in the formation of chitosan nanoparticles was better compared to the addition of other acids. Furthermore, synthesized chitosan nanoparticles (50–110 nm) produced from formic acid solutions have potential applications for drug carrier purposes."

"The abundance of graphite waste can be processed into valuable materials; one alternative is by making it into an adsorbent. Graphite-based adsorbent modification can be accomplished by adding magnetite nanoparticles Fe3O4. The addition of magnetite nanoparticles has been reported to improve the adsorption ability of the graphite waste. In this study, we have developed a new carbon dioxide (CO2) adsorbent based on graphite waste modified with magnetite nanoparticle Fe3O4. The Fe3O4 were prepared using an impregnation technique. The graphite/Fe3O4 composites were characterized by scanning electron microscopy with an energy-dispersive X-ray system (SEM-EDX) and Brunauer, Emmett, and Teller (BET). The CO2 adsorption performance was evaluated using an isothermal adsorption method at various temperatures (30, 35, and 45oC) and pressures (3, 5, 8, 15, and 20 bar). This resulted in graphite with different magnetite modification levels, namely non-modified graphite (GNM), a graphite/Fe3O4 20% (w/w) composite (G/Fe3O4 20%), and a graphite/Fe3O4 35% (w/w) (G/Fe3O4 35%), which indicated that the largest adsorption capacity is 10.305 mmol.g-1 at 30oC and 20 bar pressure for the G/Fe3O4 20% composite. This finding further revealed that modifying graphite waste with magnetite nanoparticles Fe3O4 has been proved to increase the capacity for adsorbing CO2 gas."

"The main focus of this article was to investigate the potential of natural zeolite adsorbent for the removal of CO2 and H2S in biogas produced from palm oil mill effluent (POME) in fixed-bed column adsorption. The effects of the flowrates and dosage of the adsorbent on the CO2 adsorption were also studied. The surface area of the adsorbent was determined using the Brunauer, Emmett, and Teller (BET) model, while the pore size distribution was calculated according to the Barrett, Joyner, and Halenda (BJH) model. The morphology of the adsorbent was determined by field emission scanning electron microscopy and energy dispersive x-ray (FESEM-EDX) analysis. Before and after purification, the biogas was analyzed by gas chromatography with a thermal conductivity detector and polydimethylsiloxane as a column. Biogas from the POME, via the anaerobic digestion process, produced 89% CH4 and 11% CO2. The surface and structure of the clinoptilolite zeolites was modified by a strong acid (1M HCl), strong base (1M NaOH), and calcination at 450°C, and the surface area of the natural zeolites was reduced up to 16%. The working capability of CO2 adsorption by the modified zeolites decreased with increasing flow rates (100, 200, and 300 mL/min) of the biogas, with levels of CO2 at 106,906, 112,237, and 115,256 mg/L. The removal of the CO2 in the biogas by using adsorbent dosages of 1.5, 2.0, and 2.5 g was 97,878, 97,404 and 93,855 mg/L, respectively. The optimum purification of the biogas occurred under the flow rate of 100 mL/min and adsorbent dosage of 2.5 g. The high working capability of the modified zeolites for the removal of CO2 in the biogas was a key factor, and the most important characteristic for the adsorbent. The results indicate that clinoptilolite zeolites are promising adsorbent materials for both the purification and upgrading of biogas."

"Latar belakang: Peningkatan populasi usia lanjut diikuti dengan meningkatnya masalah kesehatan terkait penurunan kapasitas fungsional. Gangguan kognitif ringan sering dijumpai pada usia lanjut, yang merupakan fase transisi sebelum berkembang menjadi demensia. Aktivitas fisik yang bersifat aerobik terbukti bermanfaat mempertahankan fungsi kognitif usia lanjut dan mencegah terjadinya demensia pada populasi ini, namun studi berjalan kaki terukur menggunakan pedometer belum diteliti di Indonesia. Metode: Studi ini bertujuan menilai efek aktivitas berjalan kaki terukur minimal 4000 langkah setiap hari selama 12 minggu terhadap fungsi kognitif usia lanjut dengan gangguan kognitif ringan. Studi ini adalah studi intervensi mixed method, quantitative and qualitative research, dilakukan pada 12 subjek, berusia 60-74 tahun, di Poliklinik Rumah Sakit Ciptomangukusumo. Penilaian fungsi kognitif menggunakan kuesioner MoCa-Ina berbahasa Indonesia, yang dinilai sebelum dan setelah intervensi. Hasil: Rerata capaian jumlah langkah harian adalah 5689 ± 505,59 langkah. Terjadi peningkatan rerata nilai MoCa-Ina sebelum dan setelah intervensi (26,0 ± 3,16 dan 27,29 ± 1,49, p=0,175). Pada akhir intervensi, dilakukan wawancara kepada seluruh subjek yang berhasil menyelesaikan program, didapatkan bahwa seluruh subjek merasakan peningkatan kebugaran fisik dan tidak ada efek samping yang terjadi selama intervensi. Simpulan: Aktivitas berjalan kaki terukur minimal 4000 langkah setiap hari selama 12 minggu dapat mempertahankan fungsi kognitif usia lanjut dengan gangguan kognitif ringan.

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Background: The increasing of elderly population followed by increasing health problems due to decreased functional capacity. Mild cognitive impairment commonly found in the elderly, which is a transitional phase before developing into dementia. Aerobic physical activity has been shown to be beneficial in maintaining cognitive function in the elderly and preventing dementia in this population, however, studies of walking-based pedometer have not been studied in Indonesia.

Methods: This study aims to assess the effect of 12 week of 4000-daily steps of the pedometer-home based walking activity on cognitive function in elderly with mild cognitive impairment. This study is a mixed method, quantitative and qualitative research intervention study, conducted on twelve subjects, aged 60-74 years, at the outpatient Ciptomangukusumo Hospital. Evaluation of cognitive function using the MoCa-Ina questionnaire Indonesian version, which was assessed before and after the intervention.

Results: The average number of daily steps count was 5689 ± 505.59 steps. There was an increase in the mean value of MoCa-Ina before and after the intervention (26.0 ± 3.16 and 27.29 ± 1.49, p=0.175). Interviews were conducted with all subjects who successfully completed the program, it was found that all subjects felt an increase in physical fitness and no side effects occurred during the intervention.

Conclusion: Twelve weeks of 4000 daily steps maintain cognitive function in the elderly with mild cognitive impairment."