649 research outputs found

    Desain Arsitektur Dan Basis Data Supply Chain Integration Menggunakan Strategi Push-Pull (Studi Kasus Pada Toko Buku "a" Di YOGYAKARTA)

    Full text link
    Penerapan teknologi sudah merambah dalam dunia bisnis yang digunakan untuk membantu proses pengolahan data. Dalam hal penjualan, diterapkan proses Supply Chain Integration untuk membatu pengambil keputusan dalam mengintegrasikan proses bisnis Perusahaan. Strategi Supply Chain Integration terdiri dari 2 model, yaitu model tradisional dan model modern. Model tradisional menggunakan 2 cara yaitu ‘Push' dan ‘Pull', sedangkan untuk model modern merupakan gabungan dari ke dua cara tradisonal tersebut. Jurnal ini akan membahas bagaimana penerapan model modern dalam mengolah data pada toko buku “A” di Yogyakarta

    Analisis Penerimaan (Acceptance) Penerapan Internet Sehat Dengan Technology Acceptance Model (Tam) (Studi Kasus Pada STMIK AMIKOM YOGYAKARTA)

    Full text link
    Pengertian konsep framework policy internet sehat dalam konteks penelitian ini adalah menganalisa segala bentuk tingkat kepentingan dalam penggunaan internet pada lingkungan perguruan tinggi secara benar yang digunakan, sebagai suatu analisa dalam menentukan atau bagaimana menyusunnya, mengimplementasi, serta mengelolanya secara efektif dan efisien, agar tujuan pengoptimalan kinerja dapat tercapai

    Screening phytochimique et identification spectroscopique des flavonoïdes d’Asteriscusgraveolenssubsp. odorus

    Get PDF
    Ce travail s’intĂ©resse Ă  l’étude phytochimique d’une espĂšce du Sud du Maroc appartenant Ă  la famille des Asteraceae : Asteriscusgraveolenssubsp. odorus. Le screening phytochimique des feuilles et des fleurs de cette plante, effectuĂ©e pour la premiĂšre fois, a rĂ©vĂ©lĂ© la prĂ©sence des alcaloĂŻdes, des flavonoĂŻdes, des tanins catĂ©chiques, des terpĂšnes, des coumarines et des composĂ©s cyanogĂ©nĂ©tiques. Quant aux saponines et les quinones libres, ils sont prĂ©sents chez les fleurs et absents chez les feuilles. La caractĂ©risation des molĂ©cules par spectrophotomĂ©trie UV a rĂ©vĂ©lĂ© la prĂ©sence de l’acide cafĂ©ique, nĂ©vadensine, lutĂ©oline et artemĂ©tine dans les feuilles d’Asteriscus graveolens subsp. odorus.Mots-clĂ©s : analyse spectrophotomĂ©trique, screening phytochimique, asteriscus graveolens subsp. odorus

    Decolourization of Acid Orange 7 Dye from Aqueous Solution by Adsorption on NaOH Treated Eggshells in Continuous Fixed Bed Reactor Application using Response Surface Methodology: Optimization by Box–Behnken Design.

    Get PDF
    NaOH Treated Eggshells   (TES) was investigated for the removal of Acide Orange 7 (AO7) from aqueous solution using the continuous method was modeled by response surface methodology (RSM) and was optimized using Box–Behnken design (BBD) . Fixed bed adsorption has become a frequently used in wastewater treatment processes. Various low cost adsorbents have been studied for their applicability in treatment of different types of effluents.  In this work, the intention of the study was to explore the efficacy and feasibility for azo dye, AO7 adsorption onto fixed bed column of TES. The effect of operating parameters such as flow rate, initial dye concentration, and bed height were exploited in this study. The studies confirmed that the breakthrough curves were dependent on flow rate, initial dye concentration solution of AO7 and bed depth.The precision of the equation obtained by Box–Behnken design (BBD) utility for modeling and optimization by response surface methodology RSM was confirmed by the analysis of variance (ANOVA) and calculation of correlation coefficient relating the predicted and the experimental values of removal of dye. The results revealed a good agreement between the predicted values, as obtained by the model, and the experimental values for AO7. The optimum conditions proposed by Box–Behnken design (BBD) to reach the maximum dye removal through adsorption process. Under the optimum conditions, the removal efficiency of AO7 were 89.89%.The application of response surface methodology in order to optimize using Box–Behnken design (BBD) . The research on modeling adsorption by RSM has been highly developed and The TES was shown to be suitable adsorbent for adsorption of AO7 using fixed-bed adsorption column

    Effect of Mg contents on the mechanical proprieties and precipitation kinetics in Al–3.3 wt.% Cu alloy

    Get PDF
    The effect of additional Mg on the microstructure, mechanical properties, and transformation kinetics during aging in Al–3.3 wt.% Cu alloy was studied. The compositions and microstructure were examined by X-ray diffraction, Differential scanning calorimetry (DSC) and scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDS). The results show that the Mg in the Al–Cu alloy mainly precipitated to the grain boundaries during the process of transformation and formed a ternary Al2CuMg metallic compound and the rate of discontinuous precipitation reaction decreases with increasing concentration of Mg. The activation energy of crystallization was evaluated by applying the Kissinger equation

    Chromium(III) biosorption onto spent grains residual from brewing industry : equilibrium, kinetics and column studies

    Get PDF
    The use of industrial wastes for wastewater treatment as a strategy to their re-use and valorisation may provide important advances toward sustainability. The present work gives new insights into heavy metal biosorption onto low-cost biosorbents, studying chromium(III) biosorption onto spent grains residual from a Portuguese brewing industry both in batch and expanded bed column systems. Experimental studies involved unmodified spent grains and spent grains treated with NaOH. Metal uptake followed a rapid initial step, well described by the pseudo-second-order kinetic model up to 27 h, indicating chemisorption to be the rate-limiting step. Beyond this period intraparticle diffusion assumed an important role in the uptake global kinetics. The best fit for equilibrium data was obtained using the Langmuir model, with unmodified spent grains having the higher maximum uptake capacity (q max = 16.7 mg g1). In open system studies, using expanded bed columns, the best performance was also achieved with unmodified spent grains: Breakthrough time (C/C i = 0.25) and total saturation time (C/C i = 0.99) occurred after 58 and 199 h of operation, corresponding to the accumulation of 390 mg of chromium(III), 43.3 % of the total amount entering the column. These results suggest that alkali treatment does not improve spent grains uptake performance. Changes in biomass composition determined by Fourier transform infrared spectroscopy suggested hydroxyl groups and proteins to have an important role in chromium(III) biosorption. This study points out that unmodified spent grains can be successfully used as low-cost biosorbent for trivalent chromium.The authors would like to thank the Portuguese brewing industry UNICER for all the support and FCT (Fundacao para a Ciencia e a Tecnologia) financial support through the Grant PRAXIS XXI/BD/15945/98

    Marker-assisted recurrent selection for pyramiding leaf rust and coffee berry disease resistance alleles in Coffea Arabica L.

    Get PDF
    Abstract: In this study, marker-assisted recurrent selection was evaluated for pyramiding resistance gene alleles against coffee leaf rust (CLR) and coffee berry diseases (CBD) in Coffea arabica. A total of 144 genotypes corresponding to 12 hybrid populations from crosses between eight parent plants with desired morphological and agronomic traits were evaluated. Molecular data were used for cross-certification, diversity study and resistance allele marker-assisted selection (MAS) against the causal agent of coffee leaf rust (Hemileia vastatrix) and coffee berry disease (Colletotrichum kahawae). In addition, nine morphological and agronomic traits were evaluated to determine the components of variance, select superior hybrids, and estimate genetic gain. From the genotypes evaluated, 134 were confirmed as hybrids. The genetic diversity between and within populations was 75.5% and 24.5%, respectively, and the cluster analysis revealed three primary groups. Pyramiding of CLR and CBD resistance genes was conducted in 11 genotypes using MAS. A selection intensity of 30% resulted in a gain of over 50% compared to the original population. Selected hybrids with increased gain also showed greater genetic divergence in addition to the pyramided resistance alleles. The strategies used were, therefore, efficient to select superior coffee hybrids for recurrent selection programs and could be used as a source of resistance in various crosses

    Is Mercury Orange a selective stain for thiols?

    Full text link
    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/42852/1/10735_2005_Article_BF01005240.pd
    • 

    corecore