Technology Reports of Kansai University (ISSN: 04532198) is a monthly peer-reviewed and open-access international Journal. It was first built in 1959 and officially in 1975 till now by kansai university, japan. The journal covers all sort of engineering topic, mathematics and physics. Technology Reports of Kansai University (TRKU) was closed access journal until 2017. After that TRKU became open access journal. TRKU is a scopus indexed journal and directly run by faculty of engineering, kansai university.
Technology Reports of Kansai University (ISSN: 04532198) is a peer-reviewed journal. The journal covers all sort of engineering topic as well as mathematics and physics. the journal's scopes are
in the following fields but not limited to:
Zhonghua er bi yan hou tou jing wai ke za zhi = Chinese journal of otorhinolaryngology head and neck surgery
Interventional Pulmonology
Aloe vera is considered as member of the Liliaceae family and Aloe Chinensis Baker is one of the species that is widely cultivated in Pontianak, Indonesia. The quality parameters of Aloe vera juice include pH, refractive index, vitamin C and density. The objectives of this study to investigate the influence of Sodium benzoate-Citric acid on the quality of Aloe vera gel juice, including pH, density, refractive index and vitamin C, as well to determine the storage time by using the Arrhenius approach. This study used 3 L of Aloe vera gel juice added with 1.8 g of Sodium benzoate and 6 g of Citric acid, stirred until homogenous then divided into bottles of 200 mL each for analyzing pH, refractive index, density, and vitamin C contents at the storage temperature of 30oC, 40oC and 50oC with the storage time of 0, 10, 20, 30, 40, 50 and 70 days. The determination of Aloe vera gel juice storage time was calculated using linear regression equation of the parameter with the lowest amount of activation energy. The obtained equation to determine the storage time was Ln k = -1233.1(1/T) – 0.8438 with the total activation energy of vitamin C is 2450.1697 cal/mol
The potentiality of Share clay as an ingredient for synthesis of metakaolin based geopolymer and the effect of partially substituting the clay with the cullet of cathode ray tube (CRT) was investigated. Calcined clay in partial substitution with powdered CRT in the mix proportion of 0%, 25%, 50% and 75% by weight was reacted with sodium hydroxide (NaOH) and sodium silicate (Na2SiO3). The resulting geopolymer samples were used to produce test specimens and the effect of different percentage addition of CRT on the physicomechanical properties were evaluated. The starting materials and the products were characterized using Scanning Electron Microscopy (SEM) to evaluate morphology, X-Ray Fluorescence (XRF) for oxides composition, X-Ray Diffractometer (XRD) for compositional phases, Atomic Absorption Spectroscopy (AAS) for elemental components and Fourier Transform Infra-Red microscopy (FTIR) for characteristic bonding. Results shows that the alumina and silica content of Share clay are 30% and 92% respectively while that of the CRT were 3% alumina and 29% silica. The water absorption of the geopolymer increases with increasing CRT addition. The Compressive strength in 24 hours ranged from 13 to 17 N/mm2. The drying shrinkage ranged from 0.5mm to 1.25 mm. CRT is as usable as other pozzolanic material to be used with kaolinite in the synthesis of geopolymer. This offers the opportunity for resource recovery from and beneficial use of CRT, which is considered a toxic e-waste.
