7 research outputs found
Effect of filler loading of characteristic natural rubber latex (NRL) film filled with nanocrystal cellulose (NCC) and dipersion agent polyvinylpyrrolidone (PVP)
No full textEffect of cellulose nanocrystals from corn cob with dispersion agent polyvinyl pyrrolidone in natural rubber latex film after aging treatment
No full textCharacterization of Hydroxyapatite from Chicken Bone via Precipitation
No full textIn this study, chicken bone was used as starting material for hydroxyapatite (HAp) synthesis. Chicken bone was calcined in electric furnace at 1000°C for 5 hours in order to obtain calcium oxide. Calcium oxide was reacted with aquadest to form calcium dioxide which was used as calcium precursor. Calcium dioxide was reacted with phosphoric acid which was used as phosphorus precursor. This reaction was conducted at pH 10 and reaction temperature was 40°C. The obtained results of this reaction were calcined at 500°C and 900°C for 2 hours and 6 hours. Then it was characterized by using FTIR, XRD and SEM. The increasing of temperature and time of calcination lead to low carbonate content and good morphology. Different result occurs in particle size which increased with increasing temperature and time of calcination. HAp that synthesized from this study had low purity. Best result was obtained in calcination at temperature 900°C and in 6 hours long where crystal size and crystallinity degree from this sample were 63.021 nm and 87.30% respectively.</jats:p
Furfural Production from Mile-a-Minute Weed (Mikania micrantha) Using Organic Acid from Bilimbi (Averrhoa bilimbi)
No full textThe Effect of Drying Temperature on Natural Rubber Latex (NRL) Films with Modification of Nanocrystal Cellulose (NCC) Filler
No full textThe Effectiveness of Mobile Learning Based Android in Learning English Vocabularies
No full textThis study aims to determine the effectiveness of mobile learning based android in learning vocabulary at the seventh-grade students of SMP Batara Gowa. This type of research is pre-experimental. The research design used was pre-experimental design, namely one group pre-test post-test design. The populations in this study were all seventh-grade students of SMP Batara Gowa, and the sample was class VII.1 as the experimental class which was chosen by using purposive sampling. The results of the data analysis show that the mean score of post-test (70.55) was higher than the mean score of pre-test (34.65). The result of the t-test was 30.117 and t-table 2.093. It could be indicated that the null hypothesis (H0) was rejected and the alternative hypothesis (H1) was accepted. Based on the effectiveness criteria, generally using mobile learning based android was effective in learning vocabulary at the seventh-grade students of SMP Batara Gowa
