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All Journal Alotrop Jurnal Pendidikan dan Ilmu Kimia PENDIPA Journal of Science Education
Sumpono Sumpono
Universitas Bengkulu
Chemistry Education Mathematics

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UJI AKTIVITAS ASAP CAIR CANGKANG BUAH KARET (Hevea brassiliensis) DAN APLIKASINYA DALAM PENGHAMBATAN KETENGIKAN DAGING SAPI Haulia Dwi Putri; Sumpono Sumpono; Nurhamidah Nurhamidah
ALOTROP Vol 2, No 2 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i2.7474

Abstract

This research was aimed to know the degree of Fenol compound, total acid and the activity of liquid smoke of Rubber (Hevea brassiliensis) Seed Shell also the application in obstructing the rancidity of beef. The Fenol compound was determined by using Reagen Follon-Ciocalteu. The total acid was determined by using the method of titrated acids.The ability as the antioxidant was tested by DPPH method and the ability of obstructing the rancidity of beef was done by measuring the alteration of TBA value in beef as long as saved. The result was shown the fenol compound in liquid smoke of Rubber Seed Shell as much as 0,84 % and the acetic acid content was 4.725%. The antioxidant test was produced IC50 value as much as 101.27 ppm. According to the IC50 value which got from the test that the liquid smoke of Rubber Seed Shell were included in moderate category. The increment of the liquid smoke of Rubber Seed Shell were able to suppress the rancidity of beef during the storage time. It was marked by the decreasing of TBA value in beef as given in treatment A1 (liquid smoke 4% ) and A2 liquid smoke 6%. The treatment without the liquid smoke (A0) increased the TBA value from 0.05 mgMDA/Kg on day (0) to 0.615 mgMDA/Kg on day 6. The treatment of concentration liquid smoke 4% (A1)  increased  from  0.039  mgMDA/Kg  on  day  (0) to  0.395  mgMDA/Kg  on  day  6.  The  treatment  of concentration liquid smoke 6% (A2) increased from 0.031 mgMDA/Kg on day 0 to 0.209 mgMDA/Kg on day 6.
PENGARUH KADAR Aspergillus niger TERHADAP PRODUKSI BIOETANOL DARI BONGGOL PISANG KEPOK ( Musa paradisiaca L) Junaini Junaini; Elvinawati Elvinawati; Sumpono Sumpono
ALOTROP Vol 3, No 2 (2019)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v3i2.10496

Abstract

This study aims to determine the effect of Aspergillus niger levels on bioethanol production in banana cobs using Saccharfication Simultation Fermentation (SSF) method. This research uses banana kepok (Musa paradisiaca L.) obtained from Enggano Island of Bengkulu Province. Enggano Island is one of the outermost islands of Bengkulu Province which has a coordinate point of 5023'25,000 '' LS - 102014'16,000 '' BT. Samples of banana done preparation before the hydrolysis and fermentation process by smoothing the banana cobs using a blender until it becomes mush. Samples in the form of slurry were then added by Aspergillus niger and Sccharomyces cerevisiae. Hydrolysis performed for 72 hours which then continued with the fermentation process for 5 days. In the study there were 5 treatments: addition of Aspergillus niger 107 CFU/mL, addition of 10 mL Saccharomyces cerevisiae, addition of 10 mL Saccharomyces cerevisiae + Aspergillus niger 106 CFU/mL, 10 mL Saccharomyces cerevisiae + Aspergillus niger 107CFU/mL and 10 mL Saccharomyces cerevisiae + Aspergillus niger 108CFU/mL. The fermentation results were distilled and then measured the ethanol content by the specific gravity method. Ethanol content obtained from each treatment were 3.995%, 6.218%, 6.825%, 9.065%, and 12.348%, respectively. From one-way analysis test can be obtained the value of Fcount and Ftabel respectively are 25.73 and 5.19, so the value of Ftable< Fcount which means each treatment has a different result significantly.
PERBANDINGAN AKTIVITAS DAN HASIL BELAJAR KIMIA SISWA SMAN 2 ARGAMAKMUR PADA PEMBELAJARAN MENGGUNAKAN TEAM ASSISTED INDIVIDUALIZATION DAN GROUP INVESTIGATION BERBASIS KURIKULUM 2013 Ria Kemala Dewi; Sumpono Sumpono; Salastri Rohiat
ALOTROP Vol 2, No 2 (2018)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/atp.v2i2.7481

Abstract

This research was aimed to know  the differences between the student’s chemical learning activities and achievement by using a models called Team Assisted Individualization and Group Investigation based on Curriculum 2013. The samples in this research is class X MIA 3 (Team Assisted Individualization) and X MIA 6 (Group Investigation). The result of this research is learning activities and achievement and than the analysis used are the score and percentage of mean, normality tests, homogeneity tests, hypothesis tests. The observation result of student’s learning activities in the 1 and 2 of experimental class was 78.79% and 68,18%. The mean score of student’s achievement for experimental class 1 and 2 was 80,56 and 75,31. The result of t test obtained tcount > ttable, 10,6 > 1,0 for learning activities and 3,36 > 2,30 for achievement. It means there was a significant differences between the student’s chemical learning activities and achievement by using both models of learning.
Co-Authors Aang Parade Arpinaini Arpinaini Dewi Handayani Efa Susanti Elinge Haster Elvinawati Elvinawati Evi Elyani Haulia Dwi Putri Hermansyah Amir I Nyoman Candra Junaini Junaini Lia Retno Sari M. Lutfi Firdaus Nurhamidah Ria Kemala Dewi Ridwan Yahya Rika Juwita Saputri Rina Elvia Salastri Rohiat Susi Juni Yati Windy Novita Amalia Zeta Kuntari