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All Journal HAYATI Journal of Biosciences Jurnal Pendidikan Kimia Alchemy Jurnal Penelitian Kimia Pembaharuan Hukum Science and Technology Indonesia Jurnal Penelitian Pendidikan IPA (JPPIPA) PAEDAGOGIA Jurnal Pendidikan Kimia (JPKim) Walisongo Journal of Chemistry JKPK (Jurnal Kimia dan Pendidikan Kimia) Jurnal Abdi Masyarakat Indonesia Carmin: Journal of Community Service Molekul: Jurnal Ilmiah Kimia IJIS Edu : Indonesian Journal of Integrated Science Education
Sri Retno Dwi Ariani
Universitas Sebelas Maret
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Public Health Social Sciences Other

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Multiple Representation-Based Blended Learning Model for Chemistry Learning in High School Sri Mulyani; Elfi Susanti VH; Sri Retno Dwi Ariani; Suryadi Budi Utomo; Rachma Kharolinasari; Maria Yuliana Panie
PAEDAGOGIA Vol 25, No 1 (2022): PAEDAGOGIA Jilid 25 No 1 (2022)
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/paedagogia.v25i1.56298

Abstract

Online distance learning during the COVID-19 outbreak presents new challenges and opportunities for teachers and students. The Blended Learning method is reported to be one of the promising alternatives. However, no specific study revealed the proper blended learning model for chemistry learning that require chemistry representation and can improve critical thinking and problem solving skills at high school level. Qualitative research using phenomenological methods was used in this study. The data collection technique used is using questionnaires, interviews, and documentation. A total of 22 respondents from master students of chemistry education, lecturers and teachers of chemistry education participated in this study. The blended learning model analyzed in this study are Rotational blended learning models (station class, Lab/Whole Group class, flipped class, and Individual), Flex, Self-Blend, and Enriched-Virtual classes. The study results indicate that the blended learning model that the respondents chose the most suitable for multiple representation-based chemistry learning was the Flipped Class model (50%), while the one that was not selected was the Individual Rotation model.
Optimization of Hand Sanitizer Formulation with the Addition of Lemongrass (Cymbopogon citratus (DC.) Stapf) Essential Oil and a Combination of Essential Oils of Local Indonesian Empon-empon Ariani, Sri Retno Dwi; Van Hayus, Elfi Susanti; Mulyani, Sri; Utomo, Suryadi Budi; Wathon, Muhammad Hizbul; Bilhaq, Natiq; Pramesti, Anastasia Diaz
Molekul Vol 19 No 2 (2024)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2024.19.2.10186

Abstract

ABSTRACT: This research aimed to optimize the formulation of hand sanitizer by incorporating lemongrass (Cymbopogon citratus (DC.) Stapf) essential oil in combination with essential oils of local Indonesian empon-empon: temu giring (Curcuma heyneana Val. & van Zipj.), temu kunci (Kaempferia pandurata Roxb.), and temu mangga (Curcuma amada Roxb.). The optimization of hand sanitizer formulation was done based on several tests. The first was organoleptic test by observing the aroma, color, and form; the second was pH, homogeneity, and spreadability testing, and; the third was testing the antibacterial activities of each hand sanitizer formula against Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25922. The research stages encompassed isolation of essential oils, formulation and evaluation of hand sanitizers, antibacterial activities test, optimization of hand sanitizer formulation, and identification of the chemical compounds in the hand sanitizer with the optimum formulation using the GC-MS method. The study resulted in the hand sanitizer with the optimum formulation containing the essential oils of lemongrass (3%) and temu giring (3%), demonstrating very strong antibacterial bioactivities against both E. coli ATCC 25922 and S. aureus ATCC 25923, with inhibition zones measuring 29.70 mm and 60.08 mm, respectively. This hand sanitizer had a distinctive aroma, combining the scents of lemongrass and temu giring. It was in liquid form, clear, and homogeneous, with pH and spreadibility values of 5.4 and 6.4 cm, respectively. The quality complied with SNI quality standards No. 06-2588. The primary active ingredients were E-citral (22.10%), Z-citral (17.88%), and 1,8-cineol (17.63%). Keywords: Essential oil, hand sanitizer, lemongrass, temu giring, temu kunci, temu mangga.
Pemberdayaan Perempuan Kepala Keluarga di Kelurahan Jebres melalui Pelatihan Pembuatan Lilin Aromaterapi dari Minyak Jelantah Ariani, Sri Retno Dwi; Handayani, Setiana; Kurniasari, Arin; Fafa, Salsabila Al; Aditya, Ivan; Kusumaningati, Angger Dara; Setiawan, M. Rayhansyah Putra; Taqiuddin, Aslam; Herlambang, Dicky Fadhilah
Jurnal Abdi Masyarakat Indonesia Vol 4 No 5 (2024): JAMSI - September 2024
Publisher : CV Firmos

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54082/jamsi.1247

Abstract

Pemberdayaan perempuan merupakan upaya untuk meningkatkan pengetahuan dan keterampilan perempuan sebagai bagian integral dari masyarakat yang memiliki potensi besar dalam kontribusi pembangunan. Hal ini menjadi langkah penting dalam rangka menuju kesetaraan gender karena meminimalisir diskriminasi dan meningkatkan posisi perempuan termasuk dalam hal kehidupan social dan ekonomi. Perempuan Kepala Keluarga (PEKKA) seringkali dihadapkan dengan kurangnya akses ke pelatihan keterampilan yang mendukung mereka dalam mendapatkan pekerjaan yang layak, sehingga membuat mereka banyak yang bekerja di sector informal dengan pendapatan yang tidak stabil. Kegiatan ini dilaksanakan dalam rangka program pemberdayaan masyarakat yang dilakukan oleh Tim Kuliah Kerja Nyata 106 Universitas Sebelas Maret periode Januari-Februari 2024 di Kelurahan Jebres, Kota Surakarta. Program berfokus pada tim Perempuan Kepala Keluarga (PEKKA) di Kelurahan Jebres melalui berbagai kegiatan, antara lain: 1) sosialiasi dan penyuluhan ide bisnis lilin aromaterapi dari minyak jelantah dan minyak atsiri, 2) serah terima bahan dan alat pembuatan lilin aroma terapi, 3) pelatihan dan pendampingan produksi serta pengemasan lilin aroma terapi, hingga, 4) penyuluhan analisis kelayakan usaha produksi lilin aroma terapi. Tujuan dilaksanakannya program ini untuk meningkatkan pengetahuan dan keterampilan untuk memulai usaha, menciptakan lapangan kerja, dan berkontribusi pada kesejahteraan hidup diri sendiri dan keluarga.
Effectiveness of the pH Master Application on Acid-Base Concepts as a Digital Alternative to Conventional Laboratory Practices for Enhancing Student Learning Outcomes" Kusumawati, Agnys Dewi; Ariani, Sri Retno Dwi; Indriyanti, Nurma Yunita
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 9, No 2 (2024): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v9i2.89855

Abstract

Traditional Chemistry Laboratories, such as acid-base reactions, are hard to demonstrate for present-day students in their lab classes when they need to have the knowledge exchange we had, graduating (and teaching) with mortar boards lined up and ready for weddings. The Evaluation Of The Digital Platform “pH Master” For Enhancing Chemistry Student Performance Through A Virtual Imitation of Traditional Lab Practices The study used Akker's research and development model, including initial studies, product design, testing products, and trials. Validation was done using the Aiken formula by two expert validators and three practitioners for all items with a V value greater than 0.87. Surveys for needs analysis involved 45 students, and the learning effects were assessed with 90 students across three schools. Results Students responded favourably to the pH Master app and perceived ineffable pedagogical value. Most students agreed on the necessity of doing practical activities about what was being learned, and almost all also had trouble understanding study materials specifically related to acids and bases. The results showed a statistically higher mean n-gain value in the experimental group than in control one (0.6622 versus 0.5691) by independent t-test across three schools at p < 0,001 significance level between the two groups. This then confirms that the media created did support student learning. This study highlights the potential of the pH Master app to enhance student learning experience and active involvement in chemical education, which suggests a promising approach towards digitalising conventional practical work.
Green Synthesis and Characterization of 4'-Hydroxy-4-Nitro Chalcone using Grinding Techniques Susanti VH, Elfi; Ariani, Sri Retno Dwi; Mulyani, Sri; Utomo, Suryadi Budi; Wathon, Muhammad Hizbul
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 9, No 2 (2024): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v9i2.80153

Abstract

The challenge of developing environmentally friendly synthesis methods for biologically active compounds remains a significant focus in green chemistry. This study aimed to synthesize 4'-hydroxy-4-nitro chalcone from 4-hydroxyacetophenone and 4-nitrobenzaldehyde using a grinding technique and then characterize the synthesized compounds. The 4'-hydroxy-4-nitro chalcone was synthesized via the Claisen-Schmidt grinding method for 45 minutes at room temperature. The grinding results were extracted with chloroform. The formed crystals were tested for purity by thin-layer chromatography (TLC), and further purification was carried out by recrystallization. The synthesized chalcone was characterized using FTIR, 1H-NMR, and 13C-NMR  spectroscopy. The chalcone was also tested for antibacterial activity using the disc diffusion method against Staphylococcus aureus and Escherichia coli. The results showed that 4'-hydroxy-4-nitro chalcone could be successfully synthesized from 4-hydroxyacetophenone and 4-nitrobenzaldehyde using the grinding technique, yielding orangish-white crystals with a 70.63% yield and a melting point of 173°C. Purity was confirmed by TLC, and structural characterization was achieved through FTIR, 1H-NMR and 13C-NMR spectroscopy. Antibacterial testing revealed that the synthesized chalcone produced a clear zone diameter of 9.27 mm against S. aureus and 27.88 mm against E. coli. These results indicate that the compound has relatively strong antibacterial activity against E. coli and relatively weak activity against S. aureus. This study demonstrates the effectiveness of the green synthesis method and provides valuable insights into the antibacterial properties of 4'-hydroxy-4-nitro chalcone
Effectiveness of Virtual STEM Laboratories for Enhancing High School Students' Creativity and STEM Literacy Rahmadani, Nurul Fitri; Ariani, Sri Retno Dwi; Mulyani, Sri; Indriyanti, Nurma Yunita
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 8, No 1 (2023): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v8i1.64548

Abstract

The Virtual STEM Laboratory is a contextual experimental simulation learning tool that integrates science, technology, engineering, and mathematics (STEM) concepts. This study aims to investigate the Virtual STEM Laboratory's effectiveness in enhancing high school students' STEM literacy and creativity. STEM literacy is defined as the ability of a student to apply, identify, and integrate STEM concepts to solve complex problems and innovate in various areas. Meanwhile, creativity refers to the capability to generate novel and valuable ideas or solutions. The study used an experimental design with a control group to compare the effectiveness of the Virtual STEM Laboratory. In addition, students' STEM literacy and creativity were measured using posttest scores. The results showed that the experimental group had higher STEM literacy and creativity scores compared to the control group, which indicates the effectiveness of the Virtual STEM Laboratory. The study found that the Virtual STEM Laboratory improved STEM literacy as measured by the independent t-test and Kruskal Wallis test with a significance value of 0.000. This suggests that the experimental group had better STEM literacy skills than the control group. The Virtual STEM Laboratory was also found to be effective in enhancing student creativity as measured by the independent t-test with a significance value of 0.000, which implies that the experimental group generated more novel and valuable ideas than the control group. The study confirms the Virtual STEM Laboratory's effectiveness in enhancing high school students' STEM literacy and creativity. The Virtual STEM Laboratory is a valuable tool that can improve students' STEM literacy and creativity, thus contributing to their academic and professional development. Further studies can be conducted to explore the potential of the Virtual STEM Laboratory in enhancing other aspects of STEM education. 
Formulation, characterization, and antibacterial testing of cream supplemented with Aloe vera (Aloe vera L.) gel and Nutgrass (Cyperus rotundus L.) rhizome ethanol extract Mulyani, Sri; Rahmadina, Salsabila Adzani; Susanti VH, Elfi; Ariani, Sri Retno Dwi; Utomo, Suryadi Budi; Wathon, Muhammad Hizbul
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 9, No 1 (2024): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v9i1.84205

Abstract

Various brands and forms offer a wide array of cream-based cosmetic products. However, only some of these products meet safety specifications. Aloe vera and nutgrass, two plants rich in bioactive compounds, possess anti-inflammatory, soothing, and antibacterial properties, making them ideal for health-safe cosmetic formulations. This research was conducted to develop antibacterial cream formulations incorporating these natural additives. The study focused on quality, organoleptic testing, and the formulated cream's antibacterial assessment. The research methodology encompassed several key processes: preparation of Aloe vera gel and nutgrass rhizome ethanol extract, formulation of the cream, quality testing by SNI 16-6069-1999 standards, organoleptic testing as per SNI 01-2346-2006, and antibacterial activity testing using Staphylococcus aureus ATCC 25923 and Escherichia coli ATCC 25922 bacterial strains. Results indicated that the cream formula enriched with Aloe vera gel and nutgrass rhizome ethanol extract meets the standards for skin-lightening creams and exhibits significant antibacterial capabilities. Furthermore, it was observed that the antibacterial effectiveness of the cream increases with the concentration of the nutgrass rhizome ethanol extract. These findings highlight the potential for integrating natural ingredients into modern cosmetic formulations, providing therapeutic and aesthetic benefits. This approach not only ensures compliance with safety standards but also leverages the natural properties of Aloe vera and nutgrass to enhance the product's functionality in skin care applications
Chemical Composition and Antibacterial Activity of Plumeria alba L., Polianthes tuberosa L., and Cananga ordorata L. Flowers Essential Oils as Bioadditives in Transparent Solid Bath Soap Ariani, Sri Retno Dwi; Mitsalina, Aufa Vib; Wathon, Muhammad Hizbul
Molekul Vol 19 No 3 (2024)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2024.19.3.10280

Abstract

This study aimed to analyze the chemical components and antibacterial activity of essential oils from kamboja (Plumeria alba L.), sedap malam (Polianthes tuberosa L.), and kenanga (Cananga ordorata L.) flowers against Staphylococcus aureus ATTC 25923. Additionally, the study explored the application of these essential oils as bio additives in transparent solid bath soap. The research consisted of several stages: isolation and identification of chemical components of essential oils using the GC-MS Method, transparent solid bath soap formulation, antibacterial activity test of essential oils and transparent solid bath soaps against Staphylococcus aureus ATTC 25923, organoleptic test (color, aroma, transparency, solidity, and foam) and quality test of transparent solid bath soaps (pH, water content, foam stability, saponification number, and transparency). The essential oils extracted from kamboja, sedap malam, and kenanga flowers were found to contain 17, 20, and 20 compounds, respectively. Based on the result of GC-MS analysis showed that the predominant chemical components in each essential oil were 1,1’-oxydi-2-propanol (21.01%) for kamboja, benzyl ethanoate (24.52%) for sedap malam, and caryophyllene (43.77%) for kenanga. Transparent solid bath soaps with the highest antibacterial activity against S. aureus ATTC 25923 were obtained in the formula added with kamboja, sedap malam and kenanga flowers essential oils at 3.0%, 3.0%, and 3.0%, respectively, with respective inhibitory power of 14.48 mm (strong), 13.73 mm (strong) and 13.56 mm (strong) in diameter. Organoleptic tests revealed that each soap type exhibited characteristic of the respective flower. All soap types demonstrated good quality based on parameters such as pH, water content, foam stability, saponification number and transparency. Keywords: Cananga ordorata L., essential oil, Plumeria alba L., Polianthes tuberosa L., transparent solid bath soap
Complexation and Colour Stability of Anthocyanins from the Extracts of Java Plum Fruits (Syzygium cumini) with Selected Metal Cations (Al3+, Fe3+, and Ca2+) at Various pHs Wathon, Muhammad Hizbul; Susilowati, Endang; Ariani, Sri Retno Dwi; Sari, Latifah
Science and Technology Indonesia Vol. 10 No. 1 (2025): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.1.43-55

Abstract

Anthocyanins are highly coloured polyphenols, a class of flavonoids, which are natural, non-toxic, and water-soluble compounds. Because of that, anthocyanins have been used in numerous applications, such as natural colorants for foods, beverages, and textiles. However, anthocyanins have some drawbacks regarding their stability towards temperature, pH, and light, leading to degradation. One method to improve anthocyanins’ stability can be achieved through a complexation reaction of anthocyanins with metal cations. Thus, this study aimed to investigate the stability and colour profiles of anthocyanins extracted from Java Plum fruits (Syzygium cumini) complexed with Al3+, Fe3+, and Ca2+ ions in pH 1-12. Previously, anthocyanins from Java Plum fruits have been identified by LC-MS as cyanidin-3-O-glucoside ([M]+, m/z 449.3), delphinidin-3-O-glucoside ([M]+, m/z 465.3), and petunidin O-glucoside ([M]+, m/z 479.3). The ATR FTIR was also performed to confirm the functional group of anthocyanins. The colour of each solution at different pH was evaluated by UV-Vis Spectrophotometer at 200-800 nm. Complexation of anthocyanins with Al3+, Fe3+, and Ca2+ ions showed various colours at different pHs. The complexation of anthocyanins with Al3+ at pH 4-5 developed a blue colour. The intensity of the blue colour increases with an increase in Al3+ ion concentration. This investigation showed the potential application of anthocyanin-metal chelation for the textile industry due to the range of colour produced. Furthermore, the complexation of anthocyanins to produce blue colour can be an alternative in food industries as this colour is difficult to obtain in acidic pH.
Chemical Components of Essential Oils from Woods of Cinnamomum burmanii (Ness) BL, Santalum album Linn., and Cryptocarya massoia (Oken) Kosterm and Their Application as Antibacterial Additives in Transparent Herbal Soaps Ariani, Sri Retno Dwi; Lestari, Tatik
HAYATI Journal of Biosciences Vol. 32 No. 3 (2025): May 2025
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.32.3.632-641

Abstract

This study aimed to isolate and identify the chemical components of essential oils from woods of cinnamon (Cinnamomum burmanii (Ness) BL), sandalwood (Santalum album Linn.), and massoia (Cryptocarya massoia (Oken) Kosterm) and to determine their effect as additives for transparent herbal soap in terms of their antibacterial activity against Staphylococcus aureus ATTC 25923 and the soap quality. The results showed that cinnamon, sandalwood, and massoia essential oils contained, respectively, 14, 20, and 9 chemical components, all of which had been identified. The chemical components with the highest percentage contained in the essential oils of cinnamon, sandalwood, and massoia were cinnamaldehyde (91.71%), β-bisabolen (37.79%), and massoia lactone (77.56%), respectively. The soaps’ antibacterial activity against S. aureus ATTC 25923 increased from moderate (with an inhibitory power of 9.67 mm) to strong. The addition of 3% massoia essential oil got the highest inhibitory power of 16.47 mm (strong), followed by that of 3% cinnamon essential oil and 3% sandalwood essential oil, getting 15.37 mm and 12.19 mm, respectively, both of which were considered strong as well. The results of the organoleptic description test showed that each soap had a distinctive color and aroma depending on the type of essential oil added. The quality test results, including transparency, pH, foam stability, water content, and saponification number, indicated that the formulation had good quality.
Co-Authors Addiin, Istiqomah Adi Sulistyono Aditya, Ivan Agung Nugroho Catur Saputro Anggriani, Wahyu Antuni Wiyarsi Ari Syahidul Shidiq Bakti Mulyani Bayu Antrakusuma Bilhaq, Natiq Chusna, Chotimatul Dian Nugraheni Dimas Gilang Ramadhani Elfi Susanti V. H. Elfi Susanti Van Hayus Elfi Susanti VH Elfi Susanti VH Ellya Pradipta Endang Susilowati Endang Susilowati Fadhlan Muchlas Abrori Fafa, Salsabila Al Fatihatussa’adah, Ira Fitriyana, Dyah Nur Handayani, Setiana Haryono Haryono Haryono, . Haryono, Haryono Hayuni Retno Widarti Herlambang, Dicky Fadhilah Ifah Munifah Isma Aziz Fakhrudin Karina, Yuliana Dewi Kurniasari, Arin Kus Sri Martini Kusumaningati, Angger Dara Kusumawati, Agnys Dewi Lina Mahardiani Majid, Karima Maria Ulfa Maria Yuliana Panie Martha Andriyanti Mitsalina, Aufa Vib Mohammad Masykuri Mulyani, Bakti Mulyani, Sri Murni Ramli Nanik Dwi Nurhayati Nina Ariesta Ningtyas, Arin Ika Nugrahani, Arumsasi Putri Nurma Yunita Indriyanti Pramesti, Anastasia Diaz Prasetyawati, Azizah Nur Pratiwi, Andina Eka Purwaningsih, Agustin Rachma Kharolinasari Rahmadani, Nurul Fitri Rahmadina, Salsabila Adzani Redjeki, Tri Rohmatun, Tyas Dwi Safitri, Nadia Indri Salim, Eko Nur Saputro, Sulistyo Sari, Bella Windira SARI, LATIFAH Septi Nurlaeli, Septi Setiawan, M. Rayhansyah Putra Setyaningsih, Anis Setyowati, Widiastuti Agustina Eko Sholihah, Khoirur Rohmaniatush Sholikhah, Salma Majid Fadhilatus Solikah, Siti Sri Mulyani Sri Yamtinah Sugiharto, . Sukardjo, J. S. Sukardjo, JS Sulistyo Saputro Suryadi Budi Utomo Suryadi Budi Utomo Suryadi Budi Utomo Suryani, Adik Annisa Fitri Susanti VH1, Elfi Sutikno, Andri Taqiuddin, Aslam Tatik Lestari, Tatik Tomas Istantyo Putro Tri Wasonowati, Ratna Rosidah Wardani, Laras Kusuma Wathon, Muhammad Hizbul Zahro, Ani Satun Zai, Fila Delfia Zulkarnaen, Rizmoon Nurul