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Journal of Chemistry Sciences and Education
Published by PT Pubsains Nur Cendekia
ISSN : _     EISSN : 30644461     DOI : -
Core Subject : Science, Education,
Chemistry Other
Journal of Chemistry Sciences and Education (JCSE) is a journal of chemical science and education published by Pubsains under the management of PT Pubsains Nur Cendekia. This journal provides readers with current developments in chemical science and education through the publication of articles and research reports. Each author is responsible for the content of their published articles. JCSE contains papers/articles on ideas and research in the field of chemistry education and learning, both theoretically and empirically reviewed. The journal covers critical thinking and assessment skills in chemical science and education: a) Organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, environmental chemistry, and medicinal chemistry; b) Innovations in chemistry learning, curriculum development, and educational psychology in chemistry. All articles are peer-reviewed by experts before being accepted for publication. Journal of Chemistry Sciences and Education (JCSE) is published twice a year, in May and October. The journal is open to authors worldwide, regardless of nationality.
Arjuna Subject : Kimia(semua kategori) - Kimia Teori dan Fisik
Articles 19 Documents
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Aktivitas Antibakteri Ekstrak Etanol Daun Pandan Wangi (Pandanus Amaryllifolius Roxb. Ex Lindl) Terhadap Staphyloccocus Aureus Dan Pseudomonas aeruginosa Yulli Kartika, Eka
Journal of Chemistry Sciences and Education Vol 1 No 01 (2024): Journal of Chemistry Sciences and Education (JCSE)
Publisher : PT. Pubsains Nur Cendekia

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Abstract

Pandanus amaryllifolius Roxb. Ex Lindl is often found in Indonesia and has antibacterial properties. The secondary metabolite content in Pandanus amaryllifolius leaves is flavonoids, alkaloids, tannins, and steroids, which have antibacterial potential. The aim of this research was to determine the antibacterial activity of the ethanol extract of Pandanus amaryllifolius leaves against the bacteria Staphilaccocus aureus and Pseudomonas aeruginosa. The extraction method in this research used the maceration method using a 96% ethanol solvent. The macerate was concentrated using a vacuum rotary evaporator, and the extract was tested for phytochemistry and antibacterial activity. The antibacterial activity test was measured using the disc diffusion method in various concentrations, namely 20%, 40%, and 60%. The results showed that at a concentration of 60%, the average diameter of the inhibitory area for Staphilaccocus aureus and Pseudomonas aeruginosa bacteria was 1.25 and 1.35 mm, respectively.
UJI SITOTOKSIK EKSTRAK DAUN WALANG (Etlingera walang (Blume) R.M.Sm) DENGAN METODE BRINE SHRIMP LETHALITY TEST (BSLT) Novi, Cory
Journal of Chemistry Sciences and Education Vol 1 No 01 (2024): Journal of Chemistry Sciences and Education (JCSE)
Publisher : PT. Pubsains Nur Cendekia

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Abstract

Etlingera merupakan salah satu genus tumbuhan yang dipercayai memiliki senyawa sitotoksik terhadap sel kanker. Daun walang (Etlingera walang (Blume) R.M.Sm merupakan tumbuhan yang termasuk dalam genus etlingera, namun belum ada laporan penelitian tentang aktivitas sitotoksisitasnya. Penelitian ini bertujuan untuk mengetahui pengaruh toksisitas ekstrak dan nilai efektifitas toksik ekstrak daun walang terhadap larva udang Artemia Salina Leach dengan menggunakan metode Brine Shrimp Lethality Test (BSLT). Ekstrak etanol yang digunakan konsentrasi 1000 ppm, 500 ppm, 100 ppm, 10 ppm dan 0 ppm (kontrol), kemudian diamati dalam 24 jam. Hasil penelitian aktivitas sitotoksisitas dari ekstrak etanol daun walang terhadap Artemia Salina Leach dengan nilai LC50 158,49 ppm. Hal ini menunjukkan ekstrak etanol daun walang bersifat sitotoksik dan berpotensi sebagai antikanker.
Komposisi Efektif Faba (Fly Ash Dan Buttom Ash) Pada Proses Fabrikasi Paving Block Amaliyah, Fina
Journal of Chemistry Sciences and Education Vol 1 No 01 (2024): Journal of Chemistry Sciences and Education (JCSE)
Publisher : PT. Pubsains Nur Cendekia

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Abstract

Telah dilakukan penelitian terkait analisis kuat tekan paving block menggunakan compression machine dengan variasi FABA (Fly Ash dan Bottom Ash) yang dilakukan di PT Indonesia Power PLTU Banten 2 Labuan OMU. Penelitian ini bertujuan untuk mengetahui kandungan mineral yang terkandung pada FABA dengan menggunakan ICP (Inductively Coupled Plasma) sehingga dapat diketahui komposisi penambahan fly ash dan bottom ash pada paving block yang memiliki kuat tekan sesuai standar. Penelitian ini menggunakan sampel uji paving block berbentuk balok berukuran panjang 21,5 cm; lebar 10,5 cm dan tinggi 8 cm dengan komposisi Fly Ash yaitu: 28,52%; 20%; 25,71%; 14,29%, untuk Bottom Ash yaitu: 17,14%; 25,71%; 20%; 31,43%, semen yang digunakan yaitu 14,29% dan abu batu 40%. Pembuatan paving block menggunakan alat kompres dengan mencampurkan FABA, semen, dan abu batu. Berdasarkan hasil pengujian diperoleh hasil analisis kandungan mineral FABA menggunakan ICP yaitu SiO2, Al2O3, Fe2O3, CaO, Na2O, K2O dan MgO. Paving block yang dihasilkan memiliki kuat tekan yang sesuai dengan standar SNI 3-0349-1989 yaitu: 41,74 Mpa, 48,70 Mpa, 49,70 Mpa dan 57,64 MPa.
Formulasi Dan Uji Evaluasi Sediaan Hand & Body Lotion Minyak Bekatul (Rice Bran Oil) Sebagai Antioksidan setiawan, agus
Journal of Chemistry Sciences and Education Vol 1 No 01 (2024): Journal of Chemistry Sciences and Education (JCSE)
Publisher : PT. Pubsains Nur Cendekia

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Abstract

Produksi padi Indonesia sebesar 56,54 juta ton pada tahun 2018 yang diperkirakan menghasilkan limbah bekatul sebesar 4,52 juta ton. Bekatul bisa diolah menjadi minyak dedak padi atau yang lebih dikenal sebagai rice bran oil (RBO). Yang mengandung antioksidan alami tokoferol, tokotrienol dan oryzanol yang bermanfaat melawan radikal bebas dalam tubuh terutama sel kanker. Tujuan penelitian ini adalah untuk memformulasi dan menguji efektivitas hand & body lotion minyak bekatul (rice bran oil) sebagai antioksidan. Metode peneltiian dilakukan dengan eksperimental secara in vitro. Bekatul diekstraksi menjadi minyak bekatul yang kemudian di formulasi menjadi sedian hand & body lotion dengan konsentrasi 2,5; 5 dan 7,5% dan di evaluasi sediaan serta di uji akttivitas antioksidan dengan metode DPPH. Hasil peneltiian menunjukkan bahwa minyak bekatul (rice bran oil) memiliki aktivitas antioksidan dengan nilai rata-rata IC50 sebesar 86,767 ppm (kategori antioksidan kuat). Formula hand and body lotion minyak bekatul (rice bran oil) pada konsentrasi F1 (1,25%); F2 (2,5%) dan F3 (5%) memiliki sifat fisik yang baik yaitu pH; homogenitas, pemisahan fase, viskositas, daya sebar, warna dan bau yang memenuhi persyaratan sediaan topikal. Formulasi sediaan hand & body lotion dari minyak bekatul yang terbaik adalah F3 (minyak bekatul konsentrasi 5%).
Pembuatan Plastik Biodegradable Dari Limbah Kulit Nanas Dengan Plasticizer Sorbitol wijayanti, sri
Journal of Chemistry Sciences and Education Vol 1 No 01 (2024): Journal of Chemistry Sciences and Education (JCSE)
Publisher : PT. Pubsains Nur Cendekia

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Abstract

Plastik biodegradable merupakan jenis plastik yang terbuat dari biopolimer. Biopolimer adalah polimer yang tersusun atas biomassa yang dapat diperbaharui. Proses pembuatan plastik biodegradable menggunakan metode polimerisasi. Bahan pembuat plastik biodegradable meliputi biopolimer, aquadest, asam cuka, dan plasticizer. Pada penelitian ini biopolimer yang digunakan adalah selulosa dari limbah kulit nanas dan plasticizer yang digunakan adalah sorbitol. Penelitian ini bertujuan untuk menentukan pengaruh penambahan plasticizer sorbitol terhadap biodegradabilitas dari bioplastik yang dibuat. Pada penelitian ini, pembuatan bioplastik menggunakan variasi sorbitol (0,5; 1; 1,5; 2; dan 2,5 mL). Karakterisasi yang digunakan meliputi uji ketahanan air, uji biodegradabilitas dan analisis gugus fungsi. Dari hasil uji ketahanan air didapatkan kondisi terbaik pada bioplastik dengan penambahan sorbitol 2,5 mL sebesar 93,33% dan uji biodegradabilitas optimum didapatkan pada bioplastik dengan penambahan sorbitol 2,5 mL sebesar 77,78%. Bioplastik yang dihasilkan selanjutnya dikarakterisasi gugus fungsinya dengan menggunakan FT-IR terdapat gugus -OH, -CH, -NH2, dan -CO menunjukkan bahan bioplastik merupakan bahan yang mudah terdegradasi karena bahan penyusunnya merupakan senyawa organik.
Identifikasi Mikonsepi Siswa Kelas X Pada Materi Struktur Atom Herdien, Rahmah Aprillia
Journal of Chemistry Sciences and Education Vol 1 No 02 (2024): Journal of Chemistry Sciences and Education
Publisher : PT. Pubsains Nur Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69606/jcse.v1i02.129

Abstract

Chemistry is a science that is not easily understood by students. The main obstacle to understanding chemical concepts is understanding at the sub-microscopic level which is often overlooked and understanding is only emphasized at the macroscopic and symbolic level. The atomic structure is the basic material of chemistry which often gives rise to misconceptions because it has an abstract and difficult concept. If during learning students experience misconceptions about one of the basic concepts, then the possibility of misconceptions arising will be greater for more complex concepts. Therefore, researchers conducted research aimed at identifying misconceptions of class X students at SMAN 1 Parung regarding Atomic Structure material. The research method used is quantitative descriptive. The research subjects were 36 class X students at SMAN 1 Parung who were determined based on purposive sampling techniques. The research instrument used was a four-tier Multiple Choice diagnostic test question, where students' answers were then analyzed and categorized based on level of understanding. The research results showed that there were 30.67% misconceptions (low category). Misconceptions in the five sub-concepts of Atomic Structure, namely the development of atomic theory according to Dalton, Thomson, Rutherford, Bohr, and quantum mechanics (27.86%); Basic particles (Protons, Electrons and Neutrons) and the process of their discovery (35.00%); Element Notation (34.29%); Isotopes, Isotones, and Isobars (30.00%); Electron Configuration (26.67%). It is hoped that the results of identifying student misconceptions can help handle student misconceptions from an early age so that they do not hinder students in learning.
Efektivitas Model Pembelajaran Inkuiri Terbimbing Pada Praktikum Asam Basa Dengan Pemanfaatan Indikator Alami Terhadap Hasil Belajar Siswa Nurjanah, Mega Bintang
Journal of Chemistry Sciences and Education Vol 1 No 02 (2024): Journal of Chemistry Sciences and Education
Publisher : PT. Pubsains Nur Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69606/jcse.v1i02.131

Abstract

Research has been conducted on the effectiveness of guided inquiry learning model on acid-base lab with the utilization of natural indicators on student learning outcomes in class XI SMA Nusantara Plus. The purpose of this study was to determine the results of learning completeness during the learning process. This research used descriptive qualitative method. The sample in this study were students of class XI MIPA 1 totaling 30 students consisting of 14 male students and 16 female students. Data collection techniques are done through written tests. The research instrument used was a multiple-choice question sheet (multiple chooise) of 10 questions. The results showed that the number of students who achieved learning completeness was 83.30% (very good category) with an average score of 81.77. Based on these results, it can be concluded that the guided inquiry learning model is effective in using practicum-based acid-base material by utilizing natural indicators at Nusantara Plus High School on student learning outcomes.
Aktivitas Antioksidan Serbuk Biji Salak (Salaca Zalacca Gaertn. Voss) Menggunakan Metode Dpph (1,1 Diphenyl-2- Picrylhydrazil) Rejeki, Desi; Pramiastuti , Oktariani; Candra Wiguna, Julio
Journal of Chemistry Sciences and Education Vol 1 No 02 (2024): Journal of Chemistry Sciences and Education
Publisher : PT. Pubsains Nur Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69606/jcse.v1i02.162

Abstract

Salak seeds are a part of the snake fruit plant that is often ignored by the public and considered as waste. Based on several research results, snake fruit has good nutritional content for health, snake fruit contains iron, is high in carbohydrates, calcium, phosphorus and vitamin C. This research aims to determine the antioxidant content in snake fruit powder. The DPPH method was chosen because it is one of the methods for determining antioxidant activity that is the fastest, simplest, and has been widely used with various solvents such as methanol and ethanol. The solvent used in this research was methanol pro analysis, because it has very high purity properties.  The activity test results used the DPPH method and the IC50 value obtained for salak seed powder was 90.89 ppm, this result is classified as a strong antioxidant.
Aktivitas Antibakteri Kombinasi Ekstrak Etanol Daun Belimbing Wuluh (Averrhoa Bilimbi L.) Dan Daun Sirih Hijau (Piper Betle L.) Terhadap Bakteri Staphylococcus Aureus Anindya, Yuarinda Melly; Rejeki, Desi Sri; Nurhidayati, Lailiana Garna; Fakhrunnisa, Farida
Journal of Chemistry Sciences and Education Vol 1 No 02 (2024): Journal of Chemistry Sciences and Education
Publisher : PT. Pubsains Nur Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69606/jcse.v1i02.163

Abstract

Wuluh starfruit (Averrhoa bilimbi L.) and green betel (Piper betle L.) leaves are medicinal plants that have antibacterial properties. Medicinal plants can be used as alternative medicine to obtain new compounds as antibacterial. The chemical compounds in wuluh starfruit leaves that have antibacterial properties are flavonoids, saponins and tannins, while green betel leaves have flavonoids, saponins, tannins and essential oils. The study aimed to determine the antibacterial activity of a combination of wuluh starfruit and green betel leaves extract against the growth of Staphylococcus aureus. The experimental research used a diffusion method by disc paper based on the diameter of the inhibition zone or the clear area formed around the paper disc. The extracts were obtained by maceration method using 96% ethanol solvent. The values of the inhibition zone in four concentrations; 5%, 10%, 15%, and 20% were respectively 13 mm, 13.5 mm, 15 mm, and 16 mm. On the other hand, the concentration of 20% had the most effective inhibition zone with a strong category against Staphylococcus aureus.  
Standardidasi Simplisia dan Ekstrak Daun Walang (Etlingerawalang (Blume) R.M.Sm) Asli Banten Novi, Cory
Journal of Chemistry Sciences and Education Vol 1 No 02 (2024): Journal of Chemistry Sciences and Education
Publisher : PT. Pubsains Nur Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69606/jcse.v1i02.169

Abstract

Walang is a plant an indigenous in Banten that belongs to the Zingberaceae family and is known to contain secondary metabolites that have potential as traditional medicine. Traditional raw materials need standardization. This study aims to standardize the simplisia and extract of walang leaves based on specific and non-specific parameters. The standardization method refers to the Indonesian Herbal Pharmacopoeia. The thick extract was obtained from the maceration of walang leaves using 70% ethanol with a yield of 3.634%. The results of organoleptic observations of simplisia are in the form of powder, green color, and distinctive odor, moisture content of 8.38%, ethanol soluble juice content of 3.90%, water soluble juice content of 3.90%, total ash content of simplisia 8.48% and acid insoluble ash content 12.02%. In contrast, the results of organoleptic observations of extracts are thick, green color and distinctive odor, moisture content of 2.17, ethanol soluble juice content of 2.58%, water-6soluble juice content of 2.36%, total ash content of extracts of 24.59% and acid insoluble ash content 27.52%. The results of specific and non-specific parameter tests of simplisia and walang leaf extract (Etlingera walang (Blume) R.M.Sm) some have met the requirements set by the Indonesian Herbal Pharmacopoeia and some have not met the requirements, namely total ash content and acid soluble content.

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