Pengaruh Kepuasan Kerja terhadap Organizational Citizenship Behaviour (Ocb) dengan Komitmen Organisasi sebagai Variabel Mediasi

Organizational Citizenship Behavior can arise from various factors within the organization, including the existenceof high employee job satisfaction and organizational commitment. When employees have work satisfaction,employee will work optimally, even doing some things that may be beyond their duties. As well as when a personhas a high commitment to the organization, employees will do anything to advance his company. According to theprevious research, it found that there is effect of work satisfaction to OCB directly or indirectly. Organizationalcommitment is a mediator variable that has found in previous research. The purpose of this study to determinewhether the organizational commitment mediates the effect of job satisfaction on Organizational CitizenshipBehaviour (OCB). This research used a quantitative method with survey approach. The population of this researchare all employees who work at Villa Almarik Resort, 75 employees. Path analysis through Sobel test is used toanalysis the hypothesis. The results showed that the indirect effect of job satisfaction variables on OCB throughorganizational commitment can be accepted. This suggests that the effect of job satisfaction on OCB would behigher if through organizational commitment

The Potency of Copper-resistant Bacteria Cupriavidus SP. Irc4 Isolated From Industrial Wastewater Treatment Plant in Rungkut-surabaya as A Bioremediation Agent for Heavy Metals

Cupriavidus sp. IrC4 is a copper-resistant bacteria isolated from activated sludge in an Industrial Wastewater Treatment Plant in Rungkut-Surabaya, Indonesia. The purpose of this research was to study the potency of Cupriavidus sp. IrC4 as a bioremediation agent for copper, lead, mercury, and cadmium. Resistance of Cupriavidus sp. IrC4 to heavy metals were determined by measuring the minimum inhibitory concentration (MIC). Accumulation of copper, cadmium, and lead were determined by Atomic Absorption Spectrophotometer. Cupriavidus sp. IrC4 showed multiple resistance to heavy metals. The MICs of Cupriavidus sp. IrC4 to copper, lead, mercury, and cadmium were 16 mM, 15 mM, 6 mM, and 5 mM, respectively. The growth of Cupriavidus sp. IrC4 was inhibited by the addition of CuSO4 in the medium. The bacteria survived in the presence of high copper concentration as shown by the extension of the lag phase up to 36 hours. The analysis demonstrated that the copper resistance of the bacteria was facilitated through the accumulation of copper. Cupriavidus sp. IrC4 accumulated up to 367.78 and 260.01 mg/gram dry weight of cells of copper and lead, respectively. The bacteria demonstrated growth in the medium containing the mixture of 0.5 mM copper, lead, cadmium and accumulated those heavy metals up to 0.14, 24.74, and 12.49 mg/g dry weight of cells, respectively. The high resistance and capability of Cupriavidus sp. IrC4 to accumulate heavy metals can be exploited in bioremediation process for removing heavy metals from industrial sewage

Bending Strength Of Lignocellulosic Materials In Softening Condition

This research aimed to understand the softening behaviour and viscoelastic property of wood, rattan, and bamboo as lignocellulosic materials. Nine years-old Fast growing teak wood [Tectona grandis L.f.], rattan [Calamus sp.], and 3 years-old andong bamboo [Gigantochloa pseudoarundinaceae (Steud.) Widjaja] were used for the experiments. The samples were taken from the bottom, middle and upper parts for wood and rattan, and that for bamboo were cut from the 1st to 20th internodes. Static bending tests were carried out in fresh (green) as control samples, air-dried, and softened by microwave heating (MW) for 1 min to determine modulus of rupture (MOR) and modulus of elasticity (MOE). The results showed that the MOR and MOE values of wood, rattan, and bamboo increased from fresh to air-dried condition, and decreased by MW. When compared at the same density, drastic increase was observed for the normalized MOR value in air-dried of rattan, i.e. 2.5 fold. However, the decreasing of all the normalized MOR values were almost the same, i.e. 0.5 fold when they were softened by MW. Remarkably increase was also appeared for the normalized MOE value in air-dried of rattan, i.e. 3.0 fold and decreased to almost zero by MW. These results indicated that rattan was more easily bent, followed by bamboo and then wood. Hydrothermal properties of chemical components significantly affected the changes of strength (MOR) and elastic properties (MOE). However, the differences in bending strength of wood, rattan, and bamboo were more likely due to differences in their anatomical structures