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INDONESIA
Jurnal Pendidikan Kimia (JPKim)
Published by Universitas Negeri Medan
ISSN : 20853653     EISSN : 25493116     DOI : 10.24114
Core Subject : Science, Education, Social,
Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science
Jurnal Pendidikan Kimia (JPKim) yang dikelola Program Pascasarjana Universitas Negeri Medan terbit 3 kali setahun, yakni bulan April, Agustus dan Desember. JPKim menerbitkan artikel ilmiah hasil-hasil penelitian pendidikan kimia dan kimia fundamental. JPKim juga menerbitkan artikel Review terkait Pendidikan Kimia dan Kimia.
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Articles 2 Documents
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Search results for , issue "Vol 10, No 1 (2018): April" : 2 Documents clear
Application of learning model with virtual lab and motivation in learning chemistry Gulmah Sugiharti; Eva Rofinta Limbong
Jurnal Pendidikan Kimia (JPKim) Vol 10, No 1 (2018): April
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (498.879 KB) | DOI: 10.24114/jpkim.v10i1.9676

Abstract

Abstract:            This study aims to determine whether there is interaction between learning models and motivation to student learning outcomes. Samples were taken by purposive as much as 2 classes, experimental class I was treated with Problem Based Learning model using Virtual Lab and experiment II class was treated with PBL model using Real Lab on acid base titration material. Student learning outcomes data obtained using the test results of learning, while the data for motivation to learn through questionnaire motivation to learn. The data analysis technique uses two-way variance analysis and Fcount test. The results showed: 1) Hypothesis test obtained Fcount (A) and (B) equal to 18,551> Ftabel (0,05) (1,48) = 4,04 hence there is interaction between learning model using virtul lab and motivation learn to result learn chemistry of students. 2) Highly motivated students, taught by PBL model using Virtual Lab gives the highest average learning result (75,536 10,10), whereas taught by PBL model using real lab give average (75,2,43). 3) Students with low learning motivation, taught by PBL model using Virtual Lab give the average of learning result (71,59 10,74), whereas taught by PBL model using Real Lab give average (72,32 10,94). Thus it is concluded that there is an interaction between learning model and learning motivation toward chemistry learning result, and students who have high learning motivation are taught by PBL model using virtual lab give higher mean, whereas students who have low learning motivation are taught by PBL model using virtual lab provides a low average learning outcome.Keywords:learning outcomes, motivation, PBL model, virtual lab, real lab
Antimicrobial and toxicity tests of flavonoid total Dendrophthoe pentandra (L) miq from false ashoke tree (Polyalthia longifolia) Aliyah Fahmi; Rumondang Bulan Nasution; Hamonangan Nainggolan
Jurnal Pendidikan Kimia (JPKim) Vol 10, No 1 (2018): April
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (353.323 KB) | DOI: 10.24114/jpkim.v10i1.9677

Abstract

Abstract:            Research on antimicrobial and toxicity tests of flavonoid total Dendrophthoe pentandra (L) Miq from false ashoke tree (Polyalthia longifolia) have been done. This study aims to determine the activity of toxicity of total flavonoid of Dendrophthoe pentandra (L) Miq as mistletoe of false ashoke tree (P. longifolia) based on Brine Shrimp Lethality Test (BSLT) method using Artemia salina Leach shrimp larvae obtained Lethal Concentration (LC50) of 30.06 mg / L which means strong toxic activity. Antimicrobial test of flavonoid total has used the diffusion method in order to obtain the inhibit zone diameter on Streptococcus mutans at the total flavonoids concentration of 3%, 6% and 9% were 6; 9 and 17.25 mm, in Escherichia coli is 3.55; 4.25 and 9.15 mm and at Candida albicans is 8.30; 4 and 5.30 mm where S. mutans and E. coli are greater but C. albicans less affect but still have good inhibitory activity so effective to be developed as  antimicrobial agents.Keywords:false ashoke leaves, antimicrobial, toxicity, diffusion and BSLT

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