Hydrogen: Jurnal Kependidikan Kimia

Journal Information
ISSN / EISSN : 2338-6487 / 2656-3061
Current Publisher: LPPM IKIP Mataram (10.33394)
Total articles ≅ 44
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Andri Wahyu Wijayadi, Lina Arifah Fitriyah, Nur Hayati
Hydrogen: Jurnal Kependidikan Kimia, Volume 8, pp 116-122; doi:10.33394/hjkk.v8i2.3124

The publisher has not yet granted permission to display this abstract.
Ariessanty Alicia Kusuma Wardhani, Antoni Pardede, Emilda Prasiska
Hydrogen: Jurnal Kependidikan Kimia, Volume 8, pp 47-57; doi:10.33394/hjkk.v8i2.2737

Abstract:
Tanaman bangkal adalah tanaman khas kalimantan selatan. Umumnya masyarakat kalimantan selatan menggunakan kulit tanaman bangkal untuk kosmetik dan daun tanaman bangkal untuk pengobatan tradisional. Penelitian ini bertujuan untuk mengetahui kemampuan tabir surya yang ditentukan melalui penentuan nilai SPF (Sun Protection Factor) dan uji antibakteri Staphylococcus aureus pada ekstrak etanol daun dan kulit batang tanaman bangkal (Nauclea subdita). Penentuan nilai SPF dilakukan menggunakan spektrofotometer UV-Vis dan uji antibakteri ekstrak terhadap Staphylococcus aureus dilakukan menggunakan metode difusi cakram. Klindamisin sebagai kontrol positif digunakan untuk menjadi pembanding aktivitas antibateri. Berdasarkan data yang diperoleh diketahui bahwa nilai SPF meningkat sesuai dengan meningkatnya konsentrasi ekstrak, baik untuk ekstrak daun maupun ekstrak kulit batang tanaman bangkal. Secara keseluruhan nilai SPF ekstrak daun lebih tinggi dibandingkan ekstrak kulit batang tanaman bangkal. Uji antibakteri pada ekstrak daun dan kulit batang tanaman bangkal menunjukkan bahwa zona hambat yang terbesar dihasilkan oleh aktivitas antibakteri ekstrak daun tanaman bangkal dengan konsentrasi 300 ppm dan kekuatan antibakterinya termasuk kategori sedang, sedangkan ekstrak kulit batang tanaman bangkal tidak menunjukkan ada zona hambat.
Netty Ino Ischak, Eka Anggraini Odja, Jafar La Kilo, Akram La Kilo
Hydrogen: Jurnal Kependidikan Kimia, Volume 8, pp 58-66; doi:10.33394/hjkk.v8i2.2748

Abstract:
Chemistry learning has so far emphasized macroscopic and symbolic aspects as a result of misconceptions and students' low understanding of chemistry. This study aims to determine the influence of science process skill through guided inquiry model on student learning outcomes on acidic-basicsolution topic. The type of research is experimental research with Posttest-Only Control Design. Sampling was done by using Purposive Sampling technique. The sample of research for the experimental class and control class were 31 students, respectively. Data collection using objective test as an instrument that contains test about acidic acid material. Data analysis technique used to test the research hypothesis is t-test. Based on the statistical results obtained the average value of post-test experimental class is 58.55 while for the control class the average post-test value is 39.68. Result of data analysis for learning result show that in significant level 0,05 obtained tcount> t table (6,22> 1,671), then H0 rejected or accepted H1. Thus it can be concluded that there is the influence of process skills of science through guided inquiry model on student learning outcomes on acidic acid solution materials.The positive effects are also discussed in this study.
Irna Il Sanuriza, Dwi Kartika Risfianty
Hydrogen: Jurnal Kependidikan Kimia, Volume 8, pp 67-73; doi:10.33394/hjkk.v8i2.2928

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Ratna Azizah Mashami, Khaeruman Khaeruman
Hydrogen: Jurnal Kependidikan Kimia, Volume 8, pp 85-96; doi:10.33394/hjkk.v8i2.3138

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Nur Candra Eka Setiawan, I Wayan Dasna, Muhammad Muchson
Hydrogen: Jurnal Kependidikan Kimia, Volume 8, pp 107-115; doi:10.33394/hjkk.v8i2.3194

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Pratiwi Hassan, Lukman Abdul Rauf Laliyo, Deasy Natalia Botutihe, Romario Abdullah
Hydrogen: Jurnal Kependidikan Kimia, Volume 8, pp 74-84; doi:10.33394/hjkk.v8i2.2961

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Muhamad Zaenudin, Ahmadi Ahmadi, Hulyadi Hulyadi
Hydrogen: Jurnal Kependidikan Kimia, Volume 8, pp 97-106; doi:10.33394/hjkk.v8i2.2983

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Dahlia Rosma Indah, Husnul Hatimah
Hydrogen: Jurnal Kependidikan Kimia, Volume 8, pp 123-136; doi:10.33394/hjkk.v8i2.3156

The publisher has not yet granted permission to display this abstract.
Risnita Vicky Listyarini, Puspita Ratna Susilawati, Rosalia Cahyaningrum, Nely Tonapa
Hydrogen: Jurnal Kependidikan Kimia, Volume 8; doi:10.33394/hjkk.v8i1.2559

Abstract:
Pumpkin (Cucurbita moschata Durch) is one of the vegetable plants that are generally consumed as food. Pumpkin skin is a waste that has potential as a raw material for making bioplastics because it has pectin content. The characteristics of pectin that are gel become a reference in making bioplastics. Bioplastic synthesis consists of four steps, namely the making of pumpkin peel flour, pectin extraction, bioplastic synthesis, and bioplastic characterization. The experimental results show that pumpkin skin waste can be extracted with HCl solution and produce pectin in a ratio of0.1:10 grams (w/w). The results of FTIR spectra characterization showed that bioplastics included pectin which produced absorption of C = O carbonyl groups in 1645 - 1625 cm-1 and C-O stretch groups at 1101 - 1104 cm-1. Bioplastics produced have yellow characteristic. Pumpkin skin waste bioplastics are expected to be an alternative solution to the utilization of waste into products.
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