Pengaruh Kompensasi dan Lingkungan Kerja Terhadap Kinerja Karyawan pada PT. Enseval Putera Megatrading cabang Pekanbaru menurut Perspektif Ekonomi Syariah

This research is motivated by the ups and downs in the quality of employee performance at PT Enseval Putera Megatrading Pekanbaru Branch from 2020 to 2022. Based on the formulation of the problems that have been made, this study aims to determine the effect of compensation and work environment on employee performance at PT Enseval Putera Megatrading Pekanbaru Branch This research is a type of quantitative research. The sample used in this study were employees of PT Enseval Putera Megatrading Pekanbaru Branch as many as approximately 52 people. Sampling technique by means of Simple Random Sampling. With data collection through observation, interviews, questionnaires and literature studies. The analysis technique in this study uses Multiple Linear Regression Analysis. This study uses multiple linear regression with the help of the SPSS Ver program. 21.00. The results of this study, compensation has a positive effect on employee performance. This is evident from the results of the t test which obtained t count X1 greater than t table, namely the value of t count (7.467) greater than t table (2.010) accepted at a significance level of 5%. The work environment has a positive effect on employee performance. This is evident from the results of the t test which obtained the t count X2 greater than the t table, namely the t value (7.484) greater than the t table (2.010), accepted at the 5% significance level. Compensation and work environment together have a positive effect on employee performance. This is evident from the results of the F test which shows the results of the F count of (415.672) greater than the F table of (3.19) accepted at the 5% significance level. Islamic economic review of the effect of compensation and work environment on employee performance at PT Enseval Putera Megatrading Pekanbaru branch can be categorized as sharia based on ijarah contract.

Synthesis and Characterization of Biopolymer/Ha Nanocomposites for Biomedical Applications

The idea of starting this research project was to elucidate the development procedure of a novel biocompatible nano composite that is directly linked to the properties of natural bone in terms of its composition, morphology, mechanical properties and biocompatibility. These nanocomposites are composed of hydroxyapatite (HA) and whitlockite (WH) nanoparticles embedded in polymeric matrix and hydrogels.The fabrication procedures used are of common use including pre-treatment of nanoparticles and embedding into biopolymers such as Cyclic olefenic copolymer and CollagenPEGDMA hybrid matrix where effect of different loading ratios of HA nanoparticles and WH nanoparticles was investigated.Nano powders of HA were chemically synthesized under various processing conditions using surfactants with different charges and chain lengths such as CTAB (cationic) and SDS (anionic) surfactants were used in the synthesis procedures for regulating the nucleation and growth of the hydroxyapatite phase. The synthesis methods, mainly based on aqueous systems were used which are simple and can offer accurate control on the nano powders of various size and morphologies. The effect of different weight ratios ofHA nanoparticles and WH was evaluated after successful fabrication of nanocomposites by dispersing these nanoparticles in polymeric matrices. TOPAS/HA, TOPAS/WH and Collagen-PEGDMA/HA nanocomposites were successfully prepared and further characterized. Solution casting procedure was used to construct these nano composites. Effect of various weight ratios was investigated on physical, chemical and mechanical properties of the nano composites. These nano composites were characterized through Scanning Electron Microscopy, Fourier Transform Infrared Spectroscopy, Compression testing, Biocompatibility testing including cell culture of bone/cartilage cell lines, antibacterial test, biodegradability, and swelling characteristics. The morphology of nanocomposites has been investigated using Scanning electron microscopy and Atomic force microscopy. Compression testingwas performed on all type of nanocomposites to evaluate and optimize the mechanical strength. Cell culture wasperformedto evaluate thebiocompatibility ofthese nanocomposites onbone cell lines in case of TOPAS/HA and TOPAS/WH while cartilage cell lines were used in the case of COl-PGD/HA nanocomposites. Swelling and degradation characteristics were also evaluated. It was revealed from this study thet the compressive strengths of nano compositescan be enhancedwith the addition of nanoparticlesand optimized to make values comparable with the compressive strength of natural bone and cartilage tissues. In case of TOPAS/HA the increased values are185 % from 0.26 to 0.74 MPa at the concentration of 10 wt%.Whearas in case of PGD-16/HA, up to 10 wt%, strength is enhanced ~ 90 % from 9 to 17.3 kPa.In case of TOPAS/WH increase of 0.2MPa to 1.7MPa in strength at lower concentration of WH upto 10wt%has been experimented. The biocompatibility data of cell viability on the whole, is above 90% in all nanocomposites and the values are even higher than95%.In TOPAS/HA (10 wt%) exhibits the highest trend for cell viability of 99.9 ± , while in case of PGD-16/HA (10 wt%) the cell viability of hybrid composites is 100 % as comparedto the TCP control group while the cell viability values are around 95-100% in case of TOPAS/WH (10wt%). These results make these nanocomposites suitable for biomedical applications.