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Molluca Journal of Chemistry Education (MJoCE)
Published by Universitas Pattimura
ISSN : 27228266     EISSN : 27228258     DOI : https://doi.org/10.30598/MJoCEvol10iss1pp1-7
Core Subject : Science, Education,
Chemistry Education
Molluca Journal of Chemistry Education (MJoCE) merupakan jurnal ilmiah berkala dengan ciri khas/identitas Kimia dari Maluku, seperti: minyak atsiri, produk dan pangan laut, pendidikan kimia yang berkarakter kelautan dan kepulauan, dll. Jurnal ini berisi tulisan ilmiah tentang bidang kimia yang meliputi hasil penelitian kimia, kimia teori, pendidikan kimia dan kimia terapan
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 16 Documents
 1   2 
Search results for , issue "Vol 8 No 1 (2018): Molluca Journal of Chemistry Education (MJoCE)" : 16 Documents clear
IMPLEMENTASI METODE PEMBELAJARAN INKUIRI PADA MATERI KIMIA RUMAH TANGGA TERHADAP PEMAHAMAN KONSEP SISWA SMP NEGERI I PULAU-PULAU ARU Fatma Al Hamid
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 1 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss1pp1-6

Abstract

Research aimed to know how the improvement of student concept understanding after process instruction using learning method inquiry. Research type deskriptive is choosen with design of learning package use one group pretest-posttest desing. Sample of this research are 33 students class VIII of SMP Negeri I Pulau-pulau Aru in academic year 2014/2015. Instrument of this research is test to examine student concept understanding, which is pretest and posttest. Data analyse with descriptive statistic show that the average of student pretest is 41,51%, the average of student postest is 85,45%, so the average gain of student concept understanding is 0,72 which show that the gain is avaliable in high gain cateogories. Based on data analyse and discussion, can be concluded that method learning inquiry is effective for use in instruction to improve student concept understanding in chemistry household matter
IMPLEMENTASI METODE PEMBELAJARAN INKUIRI PADA MATERI KIMIA RUMAH TANGGA TERHADAP PEMAHAMAN KONSEP SISWA SMP NEGERI I PULAU-PULAU ARU Al Hamid, Fatma
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 1 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Prodi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss1pp1-6

Abstract

Research aimed to know how the improvement of  student concept understanding  after process instruction using learning method inquiry. Research type deskriptive is choosen with design of learning package use one group pretest-posttest desing. Sample of this research are 33 students class VIII of SMP Negeri I Pulau-pulau Aru in academic year 2014/2015. Instrument of this research is test to examine student concept understanding, which is pretest and posttest. Data analyse with descriptive statistic show that the average of student pretest is   41,51%, the average of student postest is 85,45%, so the average gain of student concept understanding is 0,72 which show that the gain is avaliable in high gain cateogories. Based on data analyse and discussion, can be concluded that  method learning inquiry is effective for use in instruction to improve student concept understanding in chemistry household matter
WAKTU KONTAK DAN pH OPTIMUM SISA BUANGAN BATU BATA TERAKTIVASI di-(2-ethylhexcyl) phosphate acid (D2EHPA,) SEBAGAI PENJERAP Pb 2+ Eirene Grace Fransina; Jolantje Latupeirissa; Quendeline Stefanus
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 1 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss1pp7-11

Abstract

Determination of optimum pH and contact time, of broken brick from Latuhalat village as adsorbent of Pb2+ through impregnation with di-(2-ethylhexcyl) phosphate acid (D2EHPA) has been done. Bricks impregnated with di-(2-ethylhexcyl) phosphate acid concentration of 700 ppm to enlarge the surface area of ​​adsorption on bricks. The result of analysis using AAS show that optimum contact time is 3 hours, optimum pH is 8, with weight of adsorbent is 0,2 g, adsorbate concentration is 100 ppm and adsorption capacity is 49,9985 mg/g adsorbent.
WAKTU KONTAK DAN PH OPTIMUM SISA BUANGAN BATU BATA TERAKTIVASI DI-(2-ETHYLHEXCYL) PHOSPHATE ACID (D2EHPA,) SEBAGAI PENJERAP PB 2+ Fransina, Eirene Grace; Latupeirissa, Jolantje; Stefanus, Quendeline
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 1 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Prodi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss1pp7-11

Abstract

Determination of optimum pH and contact time, of broken brick from Latuhalat village as adsorbent of Pb2+ through impregnation with di-(2-ethylhexcyl) phosphate acid (D2EHPA) has been done. Bricks impregnated with di-(2-ethylhexcyl) phosphate acid concentration of 700 ppm to enlarge the surface area of ??adsorption on bricks. The result of analysis using AAS show that optimum contact time is 3 hours, optimum pH is 8, with weight of adsorbent is 0,2 g, adsorbate concentration is 100 ppm and adsorption capacity is 49,9985 mg/g adsorbent.
PEMANFAATAN KATALIS Ca3(PO4)2 DARI TULANG IKAN TUNA PADA PEMBUATAN BIODIESEL DARI MINYAK BINTANGGUR (Callophyllum inophyllum L) Rosmawaty Rosmawaty; I Wayan Sutapa; Desy Kamanasa
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 1 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss1pp12-24

Abstract

Biodiesel synthesis from bintanggur oil (Callophyllum inophyllum L.) has been done through esterification and transesterification process with Ca3(PO4)2 catalyst and methanol solvent. Production of Ca3(PO4)2 catalyst process was conducted by calcination of the Tuna’s bone at 1000ºC for 2 hours. The catalyst result was got 58.75% and then been characterized with XRD. The esterification process was performed with methanol and bintanggur oil in molar ration of 1:9 for 2 hours with 1.25% H2SO4. The transesterification process was conducted with bintanggur oil and methanol in molar ratio of 1:12 for 9 hours with 10% Ca3(PO4)2 catalyst. The conversion result by 1H-NMR is 73.76% and experimentally was 56.87%. Biodiesel was analyzed with FTIR, GC-MS, 1H-NMR and ASTM. ASTM testing result show there are spesific density of 0.9204 g/cm3, kinematic viscosity of 29.68 mm2/s, flash point at 188.5ºC, pour point at 6ºC, Conradson carbon residue of 0.162%, water content 0.175%, and copper strip corrosion of 1b
PEMANFAATAN KATALIS CA3(PO4)2 DARI TULANG IKAN TUNA PADA PEMBUATAN BIODIESEL DARI MINYAK BINTANGGUR (CALLOPHYLLUM INOPHYLLUM L) Rosmawaty, Rosmawaty; Sutapa, I Wayan; Kamanasa, Desy
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 1 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Prodi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss1pp12-24

Abstract

Biodiesel synthesis from bintanggur oil (Callophyllum inophyllum L.) has been done through esterification and transesterification process with Ca3(PO4)2 catalyst and methanol solvent. Production of Ca3(PO4)2 catalyst process was conducted by calcination of the Tuna?s bone at 1000ºC for 2 hours. The catalyst result was got 58.75%  and then been characterized with XRD. The esterification process was performed with methanol and bintanggur oil in molar ration of 1:9 for 2 hours with 1.25% H2SO4. The transesterification process was conducted with bintanggur oil and methanol in molar ratio of 1:12 for 9 hours with 10% Ca3(PO4)2 catalyst. The conversion result by 1H-NMR is 73.76% and experimentally was 56.87%. Biodiesel was analyzed with FTIR, GC-MS, 1H-NMR and ASTM. ASTM testing result show there are spesific density of 0.9204 g/cm3, kinematic viscosity of 29.68 mm2/s, flash point at 188.5ºC, pour point at 6ºC, Conradson carbon residue of 0.162%,  water content 0.175%, and  copper strip corrosion of 1b
PEMANFAATAN GETAH BUAH PEPAYA UNTUK MENINGKATKAN KUALITAS KIMIA DAGING KERANG DARAH (Anadara granosa) DENGAN BEBERAPA METODE PENGOLAHAN Ivonne Telussa; Rosmawaty Rosmawaty; Jolantje Latupeirissa
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 1 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss1pp25-35

Abstract

Getah buah papaya diambil dan diisolasi enzim papain kemudian ditambahkan dalam proses pengolahan daging kerang darah baik dengan cara direbus maupun dikukus dan sebagai pembandingnya dilakukan hal yang sama untuk daging kerang darah baik di rebus dan dikukus tanpa penambahan enzim papain hasil isolasi tersebut. Dilakukan Uji kualitas kimia daging kerang darah (Anadara granosa) hasil olahan melalui analisis proksimat dan analisis asam lemak. Hasil penelitian menunjukkan berat molekul dari enzim papain yang diisolasi dari Getah buah papaya adalah 21 kDa. Komposisi proksimat yang terbaik dibandingkan dengan kontrol (tanpa penambahan enzim papain) adalah pengolahan dengan penambahan enzim dimana pengolahan direbus dengan penambahan enzim diperoleh pH 6.757, Kadar air 68.21, kadar lemak 5.66598, dan kadar abu 1.78764 sedangkan dengan dikukus diperoleh pH 6.437, Kadar air 59.29, kadar lemak 4.22242, dan kadar abu 2.35173. Kadar protein dan nilai susut masak tertinggi berturut-turut pada perlakuan penambahan enzim papain sebesar 67 % dan 50.94 sedangkan terendah pada perlakuan tanpa penambahan enzim papain sebesar 18 % dan 40.18. Hasil analisis asam lemak dengan metode GC-MS menunjukkan bahwa kerang darah tanpa penambahan enzim mengandung 6 jenis asam lemak yaitu metil ester asam meristat (4.15%), metil ester asam palmitoleat (8,81%), metil ester asam palmitat (19.24%), metil ester asam oleat (3.43%) metil ester asam stearat (14.09%) dan metil ester arakidonat (5.19%) sedangkan kerang darah dengan penambahan enzim mengandung 7 jenis asam lemak yaitu metil ester asam meristat (5,25%), metil ester asam palmitoleat (9.62%), metil ester asam palmitat (21.54%), metil ester asam oleat cis (3.97%), metil ester asam oleat trans (4.20%), metil ester asam stearat (13.33%) dan metil ester arakidonat (5.15%).
PEMANFAATAN GETAH BUAH PEPAYA UNTUK MENINGKATKAN KUALITAS KIMIA DAGING KERANG DARAH (ANADARA GRANOSA) DENGAN BEBERAPA METODE PENGOLAHAN Telussa, Ivonne; Rosmawaty, Rosmawaty; Latupeirissa, Jolantje
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 1 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Prodi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss1pp25-35

Abstract

Getah buah papaya diambil dan diisolasi enzim papain kemudian ditambahkan dalam proses pengolahan daging kerang darah baik dengan cara direbus maupun dikukus dan sebagai pembandingnya dilakukan hal yang sama untuk daging kerang darah baik di rebus dan dikukus tanpa penambahan enzim papain hasil isolasi tersebut. Dilakukan Uji  kualitas kimia daging kerang darah  (Anadara granosa) hasil olahan melalui analisis proksimat dan analisis asam lemak. Hasil penelitian menunjukkan berat molekul dari enzim papain yang diisolasi dari  Getah buah papaya adalah 21 kDa. Komposisi proksimat yang terbaik dibandingkan dengan kontrol (tanpa penambahan enzim papain) adalah pengolahan dengan penambahan enzim dimana pengolahan direbus dengan penambahan enzim diperoleh pH 6.757, Kadar air 68.21, kadar lemak 5.66598, dan kadar abu 1.78764 sedangkan dengan dikukus  diperoleh pH 6.437, Kadar air 59.29,   kadar lemak 4.22242, dan  kadar abu 2.35173. Kadar protein dan nilai susut masak tertinggi berturut-turut pada perlakuan penambahan enzim papain sebesar 67 % dan 50.94   sedangkan  terendah pada perlakuan tanpa penambahan enzim papain sebesar 18 %  dan 40.18. Hasil analisis asam lemak dengan metode GC-MS menunjukkan bahwa kerang darah tanpa penambahan enzim mengandung 6 jenis asam lemak yaitu metil ester asam meristat (4.15%), metil ester asam palmitoleat (8,81%), metil ester asam palmitat (19.24%), metil ester asam oleat (3.43%) metil ester asam stearat (14.09%) dan metil ester arakidonat (5.19%) sedangkan  kerang darah dengan penambahan enzim mengandung 7 jenis asam lemak yaitu metil ester asam meristat (5,25%), metil ester asam palmitoleat (9.62%), metil ester asam palmitat (21.54%), metil ester asam oleat cis (3.97%), metil ester asam oleat trans (4.20%),  metil ester asam stearat (13.33%) dan metil ester arakidonat (5.15%).
SINTESIS SENYAWA t-KALKON BAHAN DASAR SENYAWA TABIR SURYA Ruslin Hadanu
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 1 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss1pp36-41

Abstract

A novel method for the synthesis of t-chalcone as material start of sunscreen compounds through aldol condensation reaction was introduced using NaOH/EtOH as a catalyst and solvent. The structures of the t-chalcone of product were confirmed by IR, GC-MS and 1H-NMR spectrosfotometer
SINTESIS SENYAWA T-KALKON BAHAN DASAR SENYAWA TABIR SURYA Hadanu, Ruslin
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 1 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Prodi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss1pp36-41

Abstract

A novel method for the synthesis of t-chalcone as material start of sunscreen compounds through aldol condensation reaction was introduced using NaOH/EtOH as a catalyst and solvent. The structures of the t-chalcone of product were confirmed by IR, GC-MS and 1H-NMR spectrosfotometer

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