Stannum : Jurnal Sains dan Terapan Kimia <p>Jurnal Sains dan Terapan Kimia published research article, minireview/review, and short communication that included studies in Inorganic Chemistry, Organic Chemistry, Analitycal Chemistry, Biochemistry, Physical Chemistry, Computational Chemistry, Chemical Engineering, and Applied Chemistry</p> Department of Chemistry - Universitas Bangka Belitung en-US Stannum : Jurnal Sains dan Terapan Kimia 2714-674X The Gel Soap with Raw Materials of Lerak Fruit (Sapindus rarak DC) <p style="text-align: justify;">Lerak (sapindus rarak DC) is one of the plants that is often used as a noble metal washer, facial cleanser as a remover for acne and as an insecticide, especially earthworms. In this study the manufacture of soap gel by using Lerak plants. Lerak fruit (<em>Sapindus rarak </em>DC) is one of the natural ingredients that can be used as an alternative in soap raw materials. Lerak fruit (<em>S. rarak</em>) contains several secondary metabolites. The most dominant secondary metabolite is saponin. These saponins act as raw material for making soap. The purpose of this study is the use of natural materials, especially Lerak fruit as raw material for gel soap Tests conducted on soap are foam test, soap quality with experiments on several stains and organoleptic soap tests. The results obtained Lerak fruit can be used as raw materials for soap. The foam test results on the soap found that the soap foaming durability was longer. The results of soap quality testing on several stains namely charcoal stains, soy sauce stains and sauces prove the soap can clean stains well. The organoleptic results get a distinctive aroma, odor, and average of density are 1.01.</p> Fitria Wijayanti Mayang Sari Roni Suprayitno Dian Aminin ##submission.copyrightStatement## 2020-04-30 2020-04-30 2 1 1 6 10.33019/jstk.v2i1.1618 Synthesis of CuO-based Nanofluids Mediated by White Egg for Ethanol Distillation Applications <p><span style="font-style: normal;">The use of solar energy to satisfy renewable energy in Indonesia has great potential. To improve the efficiency of solar collectors, some researchers proposed solar collectors that equipped by nanofluids as working fluids. CuO-based nanofluids are known as nanofluids that have excellent conductivity. The purpose of this study is to synthesise CuO nanofluids through egg white mediation methods, and it will be applied to simple distillation systems. Generally, the synthesising process is arranged based on the modification of the sol-gel method, and by the calcination, it will leave metal oxides, namely CuO-nanoparticles. The calcination temperature variation used is 150℃; 300℃; 500℃ and 700℃. According to Debye-Scherrer equations, it is known that, in optimal condition, we obtain CuO crystallite by the size is 42 nm. The use of CuO nanofluids can increase the conductivity of fluids and can increase the effectiveness of ethanol distillation by 81%.</span></p> Aliefia Noor Evi J Aisyah D.A.T. Safitri Rifqi A. Rafsanjani Yuant Tiandho ##submission.copyrightStatement## 2020-04-30 2020-04-30 2 1 7 12 10.33019/jstk.v2i1.1701 Impregnasi Ekstrak Bunga Kiacret (Spathodea campanulata) Menggunakan Kaolin Pulau Bangka <p>Penelitian ini bertujuan untuk mengetahui pengaruh impregnasi kaolin Pulau Bangka terhadap serapan terhadap ekstrak bunga kiacret dengan pelarut n-heksana. Impregnasi kaolin-ekstrak bunga kiacret dengan pelarut n-heksana ianalisis menggunakan FTIR dan Spektrofotometri UV-Vis. Berdasarkan analisis FTIR terjadi pergeseran bilangan gelombang pada 780 cm<sup>-1</sup> ke 718 cm<sup>-1</sup>. Selain itu adanya pergeseran bilangan gelombang ekstrak bunga kiacret dari 1063 cm<sup>-1</sup> ke 1044 cm<sup>-1</sup> pada ekstrak bunga-kaolin teraktivasi. Spektra UV-Vis menunjukkan bahwa penambahan kaolin (variasi 2 gram) menyebabkan daerah serapan ekstrak kiacret n-heksana mengalami pelebaran hingga 404 cm.</p> Nurhadini Nurhadini Ristika Oktavia Asriza Ken Ayu Anggraeni Anggraeni Karnelasatri Karnelasatri ##submission.copyrightStatement## 2020-04-30 2020-04-30 2 1 13 16 10.33019/jstk.v2i1.1649 A review of the development of Polymerase Chain Reaction technique and its uses in Scientific field <p>PCR (Polymerase Chain Reaction) is a scientific term and technique in molecular biology which able to generate copies of a specific DNA from two short oligodeoxynucleotide sequences (also called primers) by a polymerase-dependent repetitive thermal reaction. PCR technique brought a revolution in science especially in molecular biology since its first discovery back in 1984 as its simplicity and not a time-consuming trait. Over the past decades, PCR techniques have been modified to make it suitable for the application in each scientific field. PCR nowadays is involved in almost all studies that required DNA fragments manipulation including in food and medical analysis. By taking advantage of this revolutionary technique and if developed and used well, it would become very beneficial for humanity in many aspects</p> Lucyenne Angeline Giri Putra Christianus Jodi Yonathan Nabila Imania Niedhatrata Mochammad Hilmy Rizka Firdaus Jessica Renata Yoewono ##submission.copyrightStatement## 2020-04-30 2020-04-30 2 1 14 30 10.33019/jstk.v2i1.1619 Pengaruh Temperatur Deproteinasi Pada Deasetilasi Kitin Cangkang Udang Krosok (Penaeus semisulcatus) Terhadap Adsorpsi Logam Besi (Fe) <p>Penelitian ini bertujuan menganalisis pengaruh variasi temperatur deproteinasi pada daya adsorbsi kitosan udang krosok (<em>Penaeus semisulcatus</em>) terhadap logam besi (Fe) pada air kolong bekas penambangan timah timah di Pulau Bangka. Bahan baku kitosan yang digunakan dalam penelitian ini merupakan limbah cangkang udang krosok dari industri rumah tangga pembuatan ebi. Kitosan limbah cangkang udang ebi telah disintesis dalam tiga tahapan meliputi: deproteinasi, demineralisasi, dekolorisasi dan deasetilasi. Pada penelitian ini proses sintesis menggunakan variasi temperatur deproteinasi masing-masing: 30<sup>o</sup>C, 60<sup>o</sup>C, dan 90<sup>o</sup>C. Berdasarkan analisis data FTIR, dapat ditentukan nilai derajat deasetilasi sampel berturut-turut sebesar: 32,01% ; 30,94% dan&nbsp; 28,74%. Peningkatan temperatur deproteinasi menyebabkan nilai derajat deasetilasi kitosan menjadi menurun. Penurunan ini diakibatkan oleh rusaknya struktur kitin pada sampel akibat temperatur yang meningkat. Kandungan logam Fe pada air kulong yang digunakan dalam penelitian ini mencapai 6,1 ppm. Adsorbsi kitosan pada logam Fe dapat menurunkan kadar terlarut mencapai rata-rata 99,67% dari kadar awal. Kandungan gugus hidroksil pada kitosan menyebabkan terjadinya reaksi pembentukan senyawa hidroksida turunan dari logam besi terlarut. Senyawa besi hidroksida tersebut akan terpisah dari air dan membentuk endapan. Semakin besar nilai derajat deasetilasi maka akan semakin besar kandungan gugus hidroksil sehingga menyebabkan daya adsorbsi kitosan semakin meningkat.</p> Herman Aldila Asmar Asmar Verry Andre Fabiani Desy Yuliana Dalimunthe Megiyo Megiyo Riko Irwanto ##submission.copyrightStatement## 2020-04-30 2020-04-30 2 1 31 35 10.33019/jstk.v2i1.1722