Sistem Pengendalian Persedian Bahan Baku dalam Menunjang Efektivitas Proses Produksi pada PT Bridgestone Kab. Simalungun

Pengendalian dan perencanaan bahan baku berperann penting untuk meningkatkan efektivitas proses produksi perusahaan. Untuk itu setiap perusahaan harus memperhatikan sistem pengendalian untuk kelangsungan hidup perusahaan. PT. Bridgestone udalah perusahaan perkebunan dan pengolahan karet dimana kegiatan pokoknya adalah mengelolah karet menjadi barang setengah jadi atau diaola disebut crum rubber yaitu yang melalui proses Iori pengering. Pengeringan, Pembongkaran, pengepakan. PT. Bridgestone berorentasi pada persediaan bahan baku untuk menungjang efektivitas proses produksinya. Sehingga untuk mencapai hal tersebut perusahaan harus memperhatikan pengendalian dan perencanaan persedian bahan baku. Perusahaan dituntut untuk memenuhi permintaan produksi tanpa mengurangi kualitas produksi

Overview of the methods used in RATEN ICN for radioactive waste characterisation

The manuscript presents the results of the research and development activities carried out in the Institute for Nuclear Research Pitesti (RATEN ICN) in the field of radioactive waste characterisation. After breafly describing the Romanian context in the field of radioactive waste management, the manuscript gives details on the methods developed/optimized and applied for specific radioactive waste fluxes generated in RATEN ICN but also on RW generated by Cernavoda NPP

CONDITIONING EXPERIMENTS OF LIQUID SCINTILLATION COCKTAILS USED FOR TRITIUM ANALYSES

ABSTRACT This paper describes the results of a liquid scintillation cocktails conditioning method. This radioactive waste type is generated by the radio-chemical analysis lab of a CANDU nuclear power plant. Liquid scintillation cocktails are converted into a stable monolithic form, which minimizes the probability to release radionuclides in the environment during their interim storage, transportation and final disposal

Fluorimetry compared to spectrophotometry for uranium evaluation in liquid waste

<p>Uranium concentration levels in surface waters are of great importance because uranium presents both chemical and radiological hazard to the environment. The subject of this article is to establish that spectrophotometric method for uranium evaluation in effluents collected from liquid waste treatment generated during fabrication of nuclear fuel elements could be replaced by the optical fluorimetric technique. Both methods are briefly described. The comparison of the two methods was carried out with regard to international standards and national regulations offering from a statistical point of view a useful approach to compare two analytical measurement techniques. This methodology can be applied to any other measurement procedures. A discussion about the compliance of the fluorimetric analytical method with the mandatory discharge level of uranium concentration in surface waters is also presented.</p

Transition metal M(II) complexes with isonicotinoylhydrazone-9-anthraldehyde

New complexes of isonicotinoylhydrazone-9-anthraldehyde with Cu(II), Co(II) and Ni(II) have been prepared and characterized by analytical and physico-chemical techniques, such as elemental and thermal analyses, magnetic susceptibility and conductivity measurements, and electronic, EPR and IR spectral studies. The infrared spectral studies revealed the bidentate or monodentate nature of the Schiff base in the complexes; the pyridine nitrogen does not participate in the coordination. A tetrahedral geometry is suggested for the nitrate-complexes and an octahedral geometry for the others. Thermal studies support the chemical formulation of these complexes

Template synthesis, characterization and antimicrobial activity of some new complexes with isonicotinoyl hydrazone ligands

Complexes of Cu(II), Ni(II), Co(II) with the 9-anthraldehyde iso-nicotinoyl hydrazone ligand (HL1) and the 3,5-di-tert-butyl-4-hydroxy-benzaldehyde isonicotinoyl hydrazone ligand (H2L2) were synthesized by the template method. The complexes were characterized by analytical analysis, IR, UV-Vis and ESR spectroscopy, magnetic measurements, conductometry and thermal analysis and the two ligands by 1H-NMR spectroscopy. From the elemental analysis, 1:2 (metal:ligand) stoichiometry for the complexes of Cu(II), Ni(II) with the ligands HL1 and H2L2 and 1:1 (metal:ligand) stoichiometry for the complex of Co(II) with the ligand HL1 are proposed. The molar conductance data showed that the complexes are non-electrolytes. The magnetic susceptibility results coupled with the electronic and ESR spectra suggested a distorted octahedral geometry for the complexes Ni(II)/HL1, Ni(II)/H2L2 and Cu(II)/H2L2, a tetrahedral stereochemistry for the complex Cu/HL1 and a square-planar geometry for the complex Co/HL1. The IR spectra demonstrated the bidentate coordination of the ligands HL1 and H2L2 by the O=C amide oxygen and the azomethine nitrogen, as well as monodentate coordination of the ligand HL1 by the azomethine nitrogen in the Cu(II)complex. The antibacterial activity of the ligands and their metallic complexes were tested against Staphylococcus aureus, Escherichia coli and Klebsiella pneumoniae

REDUCING THE RISK OF SPOILAGE CAUSED BY BACILLUS CEREUS IN COW'S AND GOAT'S MILK YOGURT WITH BERRIES PUREE

The objective of this study was to investigate the impact of adding aronia (Aronia melenocarpa), raspberry (Rubus idaeus), and strawberry (Fragaria xananassa) in the form of 10% puree to a mixture of cow's and goat's milk in order to reduce the risk of spoilage caused by activity of Bacillus cereus in yoghurt made from a mixture of cow's and goat's milk. During the fermentation process (360 min.), changes in water activity, pH, moisture content, bacterial growth curve were monitored. The results showed a decrease in water activity, pH, and moisture content. Adding aronia puree to yoghurt yielded the most significant results for water activity modification (0.971-0.868), pH (5.31- 4.28), moisture content (85.12-81.55 %), and optical density (0.19-0.34). Also, the investigation of the kinetics of the Bacillus cereusgrows indicated that the stationary phase was reached at 360 minutes, resulting in a total population of 5.5·1013 c.f .u./g. Microscopic examination revealed Gram-positive strains of lactic acid bacteria, arranged in chains of varying lengths, in an amount of 139·102 c.f.u./g. Antimicrobial activity showed a zone of inhibition with a diameter of 18.5±0.1 mm in aronia yoghurt, a zone of inhibition with a diameter of 16.2±0.2 mm in raspberry yoghurt and a zone of inhibition with a diameter of 15.2±0.1 mm in strawberry yoghurt compared to classic yoghurt which showed a zone of inhibition with a diameter of 12.1±0.2 mm