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Separation and Determination of Free Fatty Acids in Corn Oil and Palm Oil by Liquid-Liquid Extraction and Acidi-Alkalimetric Titration Rusdi, Hanumi Oktiyani; Kusumaningrum, Irma Kartika; Nareswari, Tsalis Jauza; Fauziah, Putri Nanda; Maharani, Richa Nan; Natasya, Shella
Walisongo Journal of Chemistry Vol 7, No 1 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i1.20461

Free Fatty Acids (FFA), which include unsaturated fatty acids like oleic and linoleic acid and saturated fatty acids like palmitic and stearic, are present in most oil compositions. The various negative impacts of FFA require these compounds to be eliminated. This research aims to separate FFA using Liquid-Liquid Extraction (LLE) and determine the levels of FFA using acid-alkalimetric titration in corn oil and palm oil. FFA extraction was carried out for 4 minutes with a solvent ratio of 9,5 ml diethyl ether + 40 ml ethanol + 0,5 ml water. By adding 1M Na2SO4, re-extraction was carried out for 3 minutes. The results obtained were 0.95% FFA levels in corn oil and 1.26% FFA levels in palm oil. FFA levels of both oils are still below the SNI FFA percentage of 3%; besides that, it is found that the FFA levels in palm oil are higher than in corn oil

Pelatihan Pengambangan Bahan Ajar Kimia Berbasis Blended Learning Menggunakan Media Pembelajaran Quizizz dan Mentimeter bagi Guru SMA di Kota Malang Pramesti, Indah Nur; Ciptawati, Endang; Nur, Hadi; Sumari, Sumari; Aldwinarta, Farrel Hafiz; Fauziah, Putri Nanda; Nareswari, Tsalis Jauza
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol. 7 No. 2 (2023): Vol 7, No 2 (2023)
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpmmp.v7i2.58029

E-learning yang dipadukan dengan pembelajaran konvensional merupakan definisi blended learning dan merupakan salah satu metode pembelajaran yang sering diterapkan pasca pandemi Covid-19. Blended learning disertai dengan media pembelajaran yang menarik akan mampu meningkatkan hasil belajar siswa. Kegiatan layanan ini bertujuan untuk menarik guru agar terampil dalam menggunakan Quizizz dan Mentimeter, platform survei online dan presentasi interaktif. Hasil pelatihan menunjukkan respon positif dari peserta terhadap media pembelajaran yang direkomendasikan. Sebanyak 63% peserta menyatakan pelatihan ini sangat bermanfaat, 37% peserta menyatakan metode blended learning sangat efektif dilaksanakan pasca pandemi Covid-19, dan 56% peserta menyatakan penggunaan aplikasi media pembelajaran online Quizizz dan Mentimeter membantu dalam pelaksanaan blended learning.

Culturally Responsive Teaching (CRT) on Thermochemistry with AR: Action Research Aji, Eko Trian Pramono; Ardyansyah, Ananta; Nareswari, Tsalis Jauza; Sa’diyah, Noviachri Imro’atul; Rahmawati, Ulfa
IJCER (International Journal of Chemistry Education Research) VOLUME 9, ISSUE 1, APRIL 2025
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ijcer.vol9.iss1.art1

Mastering thermochemistry can be challenging for students. This study tackles teaching thermochemistry, a challenging subject with complex concepts, calculations, and lab work that students often struggle with. A structured learning approach integrating Culturally Responsive Teaching (CRT) with Augmented Reality (AR) was implemented. Conducted through action research over two cycles, the study involved 35 high school students during the 2023/2024 academic year. The study found significant improvements, with average scores rising from 76.74 in Cycle I to 83.94 in Cycle II, and the percentage of students achieving classical completion increasing from 65% to 77%.

Development of ETNOCHEM Application for Chemistry Learning with STEAM-2C Approach based on Local Wisdom Nareswari, Tsalis Jauza; Alfaruq, Muhammad Syiham; Laili, Nurul; Anggraini, Lutfia; Putri, Vanesa Kusuma; Setiawan, Nur Candra Eka
EXSACT-A Vol 2, No 1 (2024)
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/exc.v2i1.2289

Chemical substances containing complex and abstract concepts make it difficult for students to understand, while the existing teaching media have not been able to be a solution for them until now. The development of technology in the digital era is very rapidly affecting various fields including education, which plays an important role in producing quality human resources with the use of technology, one of which is mobile application. The application of mobile application intended for teachers and students in studying chemistry should be designed in accordance with the needs so that learning can take place, so that the ETNOCHEM application is made. The research method used is qualitative with the development using the System Development Life Cycle (SDLC) method that uses the Waterfall model. The development is carried out with the aim that previously abstract and difficult to understand chemicals can be solved using a combination of graphic objects, audio, visual interesting materials, through projects that will be applied by students. The delivery of the material in it uses the STEAM-2C approach to lift various disciplines and is able to connect local wisdom with science.Keywords— chemistry, Mobile, Education, SLDC, STEAM-2C

Separation and Determination of Free Fatty Acids in Corn Oil and Palm Oil by Liquid-Liquid Extraction and Acidi-Alkalimetric Titration Rusdi, Hanumi Oktiyani; Kusumaningrum, Irma Kartika; Nareswari, Tsalis Jauza; Fauziah, Putri Nanda; Maharani, Richa Nan; Natasya, Shella
Walisongo Journal of Chemistry Vol. 7 No. 1 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i1.20461

Free Fatty Acids (FFA), which include unsaturated fatty acids like oleic and linoleic acid and saturated fatty acids like palmitic and stearic, are present in most oil compositions. The various negative impacts of FFA require these compounds to be eliminated. This research aims to separate FFA using Liquid-Liquid Extraction (LLE) and determine the levels of FFA using acid-alkalimetric titration in corn oil and palm oil. FFA extraction was carried out for 4 minutes with a solvent ratio of 9,5 ml diethyl ether + 40 ml ethanol + 0,5 ml water. By adding 1M Na2SO4, re-extraction was carried out for 3 minutes. The results obtained were 0.95% FFA levels in corn oil and 1.26% FFA levels in palm oil. FFA levels of both oils are still below the SNI FFA percentage of 3%; besides that, it is found that the FFA levels in palm oil are higher than in corn oil

Formulation of a Synergistic Herbal Blend of Green Tea (Camelia sinensis) and Traditional Spices for Immune Support and Anxiety Relief Ardyansyah, Ananta; Wijaya, Dika Putra; Danar, Danar; Nareswari, Tsalis Jauza; Utami, Anggun Frista; Annisaa, Annisaa; Nadhifah, Diana; Fitrianingrum, Lely
Biology, Medicine, & Natural Product Chemistry Vol 14, No 2 (2025)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2025.142.1561-1568

COVID-19 not only brings problems to physical health but also mental health, such as anxiety. Excessive anxiety is very dangerous because it can reduce the number of white blood cells in the bloodstream. Excessive anxiety also triggers the production of excess cortisol which interferes with the immune system. This could be overcome by the combination of tea which has a relaxing effect with several immunomodulatory herbs. Green tea (Camellia sinensis) has been shown to have the effect of reducing one's anxiety and improving one's psychological health. The tea is combined with other spices, namely (Zingiber officinale), turmeric (Curcuma domestica Val), and cinnamon (Cinnamomum burmannii). This study was conducted to find out that the combination formed has met safety standards, so it can be used as an immunity-boosting drink during a pandemic. Standardization includes testing for moisture content, ash content, and organoleptic tests. The results obtained were the water content of herbal tea was as much as 6.26%, while the ash content of the tea was 5.74%. The water content and ash content had met the standards of the Ministry of Health regarding the preparation of herbal medicines. The organoleptic test performed showed that the formulation obtained was dominated by the taste of ginger, the color of turmeric, and the smell of cinnamon.

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