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Pelatihan Penggunaan Aplikasi Pendukung Publikasi Karya Tulis Ilmiah untuk Peningkatan Kompetensi Guru Kimia Sekolah Menengah Umum di Kabupaten Kubu Raya Andi Hairil Alimuddin; Endah Sayekti; Gusrizal Gusrizal; Ajuk Sapar; Rudiyansyah Rudiyansyah; Titin Anita Zahara; anis shofiyani; Nelly Wahyuni; Thamrin Usman; Risa Nofiani; Ari Widiyantoro; Agus Wibowo; Warsi Kurnia Rahayu; Yoga Pratama; Titik Lestari; Tria Susanti; Tariz Zharfan ME; Aderiya Munika
KOMUNITA: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 5 No 2 (2026): Mei
Publisher : PELITA NUSA TENGGARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60004/komunita.v5i2.595

Abstract

A workshop on the use of supporting applications for the publication of scientific papers has been carried out for Chemistry subject teachers. This activity is in collaboration with the Chemistry Subject Teachers' Conference (MGMP) of Kubu Raya Senior High Schools. This activity aims to utilize the application for compiling bibliographies and checking the similarity of scientific papers to facilitate the writing and publication of scientific papers. The method of implementing the Community Service (PKM) program is through: structural, participatory and instructional approaches; demonstration; practice and mentoring, and evaluation. The results obtained in the form of implementing a one-day workshop activity by presenting research method materials, library search tips and utilization of the Mendeley application, plagiarism checking applications and tips for avoiding plagiarism.The workshop was conducted in the form of a presentation and direct practice of using the application. In addition to being accompanied by the presenters, participants are also accompanied by instructors who have been prepared by the committee so that the activity can run smoothly. In order to increase the interest and attention of participants to participate in the activity, the organizing committee provides door prizes for participants who ask and answer quizzes from the presenters. This method can also be used as an evaluation of the level of understanding of participants in addition to the evaluation in the form of questionnaires distributed after the activity to measure the success of this PKM activity. Based on the questionnaires distributed, participants thought that this activity was very helpful in compiling scientific papers so that it was very useful for participants. Most participants considered that the facilities and training time were in accordance with those conveyed by the presenters who were in accordance with their fields. Overall, it can be concluded that the objectives of implementing this PKM have been achieved.
Kitolod (Isotoma longiflora Presi) Leaf Extract as a Bioreductor in Silver Nanoparticle Synthesis Alifiani Maulida; Gusrizal Gusrizal; Anis Shofiyani
ALCHEMY Jurnal Penelitian Kimia Vol 22, No 1 (2026): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.22.1.109231.127-137

Abstract

Silver nanoparticles (AgNPs) were synthesized using kitolod (Isotoma longiflora Presi) leaf extract as a bioreductor. This research aims to investigate the ability of extracts to act as reducing agents in the formation of AgNPs and to characterize the resulting AgNPs. The synthesis was carried out under the following conditions: pH of extract 12, reaction time 90 minutes, silver nitrate concentration 2 × 10-4 M, and extract concentration 0.08%. Fourier transform infrared (FTIR) spectra confirmed the involvement of phytochemicals in the reduction of Ag+ to Ag0. The synthesized AgNPs were spherical, with an absorption peak at around 420 nm, an average particle size of 67.38 nm, a zeta potential of -23.6 mV, and a polydispersity index (PDI) of 0.697. Stability testing showed that the synthesized AgNPs remained stable for two months at room temperature.
Synthesis and Photocatalytic Activity Test of Bi-TiO2 toward Humic Acid Degradation under Visible Light Irradiation Dien, Efraime Caroline; Aritonang, Anthoni Batahan; Gusrizal, Gusrizal
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.v8i1.71525

Abstract

Humic acid (HA) in water can harm humans if it is regularly used or consumed. HA causes problems in the water, such as color, taste, and the formation of metal complexes. Therefore, it is necessary to degrade HA to address these problems. In this study, HA degradation was carried out using bismuth-doped TiO2 (Bi-TiO2) as a photocatalyst. The effect of Bi-TiO2 synthesized at various Bi concentrations and calcination temperatures on HA degradation was investigated and compared to pristine TiO2. Bi-TiO2 was synthesized via the sol-gel method and characterized using X-Ray Diffraction (XRD), Diffuse Reflectance Spectroscopy UV-Visible (DRS UV-Vis), and Fourrier Transform-Infra Red (FT-IR) Spectroscopy. The XRD analysis showed that the optimum calcination temperature was 500oC, with the highest crystallinity index (62.04%) and smallest crystallite size (11.95 nm). The DRS UV-Vis analysis showed that Bi-TiO2 1.5% led to the lowest band gap of 1.59 eV (λ = 782.33 nm), indicating that the photocatalyst was active under visible light irradiation. The FT-IR analysis showed an adsorption peak from the Bi-O bond at 802.39 cm-1, which caused a shift in the Ti-O-Ti adsorption peak. The photodegradation test was conducted using a 30 mL volume of HA solution 50 ppm and a 50 mg mass of catalyst. The results showed that Bi-TiO2 1.5% exhibited the highest efficiency in degrading HA, achieving 68.54% under visible light irradiation for 180 minutes. These results suggest the potential of Bi-TiO2 as an alternative method for treating HA in peat water using visible light irradiation. 
Synthesis of Hydrophobic Silica Xerogel from Fly Ash for Oil–in–Water Adsorption Ummi Hanifah; Anis Shofiyani; Gusrizal Gusrizal
Jurnal Kimia Sains dan Aplikasi Vol 28, No 5 (2025): Volume 28 Issue 5 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.5.235-243

Abstract

In this study, silica xerogel was synthesized from coal fly ash modified with trimethylchlorosilane (TMCS) reagent to increase the hydrophobicity of the material. TMCS-modified silica xerogel was then used for oil adsorption in water. Silica xerogel was synthesized using the sol-gel method with sodium silicate from fly ash as a precursor and citric acid as a catalyst. The sol-gel process involves sequential steps of hydrolysis and condensation, followed by gelation (the sol-to-gel transition) and aging. Surface modification of the resulting silica xerogel was conducted using TMCS in a mixture of methanol and petroleum benzine, with volume ratios of TMCS:methanol:petroleum benzine set at 0:1:1, 1:1:1, 2:1:1, and 3:1:1. The synthesized silica xerogel was characterized using FTIR spectroscopy, SEM, GSA, and contact angle measurements to evaluate its hydrophobicity. FTIR spectrophotometry results revealed that silica modified with TMCS exhibited absorption bands corresponding to Si–CH3 groups at 843.20, 845.69, and 843.18 cm-1. These findings indicate the successful formation of silyl groups on the surface of the silica xerogel when using TMCS:methanol:phosphate buffer (PB) ratios of 0:1:1, 1:1:1, 2:1:1, and 3:1:1. SEM analysis revealed that the surface morphology of the synthesized silica xerogel exhibited a porous structure with a mesoporous pore size distribution. Based on the experimental results, it can be concluded that surface modification with TMCS enhances the hydrophobicity of the silica xerogel. An increase in TMCS volume led to a corresponding increase in hydrophobicity. The hydrophobic silica xerogel demonstrated a good adsorption capacity for oil in water, ranging from 6 to 22 mg/g, with the adsorption capacity increasing in accordance with the degree of hydrophobicity.
ANALISIS IMPLEMENTASI TOPOLOGI HYBRID STAR-TREE UNTUK INTEGRASI DATA PRESENSI SIDIK JARI MULTI-LOKASI PADA SISTEM INFORMASI KEPEGAWAIAN BERBASIS INTRANET: Uray Ristian; Evi Noviani; Gusrizal Gusrizal
JATI (Jurnal Mahasiswa Teknik Informatika) Vol. 10 No. 3 (2026): JATI Vol. 10 No. 3
Publisher : Institut Teknologi Nasional Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jati.v10i3.18128

Abstract

Sistem presensi sidik jari merupakan komponen penting dalam pengelolaan kehadiran pegawai pada Sistem Informasi Kepegawaian. Pada lingkungan FMIPA Universitas Tanjungpura, perangkat presensi sidik jari ditempatkan pada beberapa lokasi gedung yang berbeda sehingga memerlukan integrasi jaringan yang stabil untuk mendukung sinkronisasi data secara cepat dan terpusat melalui jaringan intranet. Permasalahan yang terjadi adalah perangkat presensi tersebut belum sepenuhnya terintegrasi ke dalam jaringan intranet yang ada, sehingga proses pengambilan data masih dilakukan secara manual dan menyebabkan keterlambatan sinkronisasi. Selain itu, kondisi jaringan yang tidak stabil mempengaruhi proses pengiriman data presensi. Penelitian ini bertujuan menganalisis implementasi topologi hybrid star-tree dalam mengintegrasikan data presensi sidik jari multi-lokasi pada Sistem Informasi Kepegawaian berbasis intranet di FMIPA Universitas Tanjungpura. Metode penelitian menggunakan perancangan dan implementasi topologi jaringan hybrid star-tree yang menghubungkan perangkat presensi sidik jari di beberapa lokasi ke server utama intranet, kemudian dilakukan pengujian Quality of Service (QoS) berdasarkan standar TIPHON. Hasil pengujian menunjukkan bahwa rata-rata latency jaringan sebesar 2,4ms dengan kategori Baik Sekali, serta rata-rata jitter sebesar 2,246ms dengan kategori Baik. Hasil ini menunjukkan bahwa topologi hybrid star-tree mampu memberikan performa jaringan yang stabil dan efektif untuk integrasi perangkat presensi pada area dengan cakupan jaringan yang luas.
Optimalisasi Pembelajaran: Ai Sebagai Alat Inovatif Untuk Pengembangan Bahan Ajar Sekolah Diperbatasan Kalimantan Barat Hafiz Muhardi; Gusrizal; Yudha Arman; Evi Noviani; Cucu Suhery
Komatika: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 1 (2026): May 2026
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat, Institut Informatika Indonesia Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34148/komatika.v6i1.1364

Abstract

Pemanfaatan kecerdasan buatan (Artificial Intelligence/AI) sebagai alat bantu dalam penyusunan materi pembelajaran di sekolah memiliki potensi besar untuk meningkatkan kualitas pendidikan, terutama di daerah perbatasan yang seringkali dihadapkan pada tantangan aksesibilitas dan ketersediaan sumber daya. Kegiatan pengabdian ini bertujuan untuk memenuhi tri darma perguruan tinggi dengan menyediakan kontribusi yang berkelanjutan bagi masyarakat sekaligus membantu para guru dalam memanfaatkan tools AI. Melalui studi pendahuluan yang cermat, dilakukan pemetaan kebutuhan bersama stakeholder lokal untuk memastikan bahwa pengembangan alat AI benar-benar relevan dengan kebutuhan dan konteks pembelajaran di perbatasan Kalimantan Barat. Pengembangan alat AI ini mengintegrasikan teknologi pemrosesan bahasa alami (natural language processing) untuk menghasilkan materi pembelajaran yang sesuai dengan kurikulum dan karakteristik lokal. Setelah pengembangan, alat AI diseminasi dan dipraktikkan dalam lingkungan sekolah. Pelatihan yang berkelanjutan diberikan kepada para guru untuk memastikan penggunaan yang efektif dan optimal dari alat AI tersebut. Monitoring dan evaluasi terus dilakukan untuk mengukur dampak serta memperbaiki kualitas alat AI sesuai dengan umpan balik dari pengguna. Diharapkan bahwa melalui kegiatan ini, para guru di perbatasan Kalimantan Barat akan lebih mampu menyusun materi pembelajaran yang berkualitas dan relevan dengan bantuan teknologi AI, yang pada gilirannya akan meningkatkan kualitas pendidikan dan memberikan manfaat yang nyata bagi masyarakat setempat.
Optimasi dan Validasi Metode Penentuan Kadar Asam Glikolat dan Asam Laktat Dalam Krim Menggunakan Kromatografi Cair Kinerja Tinggi Devi Wulandari; Gusrizal Gusrizal; Titin Anita Zaharah
ALCHEMY Jurnal Penelitian Kimia Vol 16, No 1 (2020): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (434.847 KB) | DOI: 10.20961/alchemy.16.1.34008.10-24

Abstract

Telah dilakukan optimasi dan validasi metode penentuan asam glikolat dan asam laktat dalam krim menggunakan kromatografi cair kinerja tinggi. Pemisahan asam glikolat dan asam laktat dilakukan pada kolom fasa balik C-8menggunakan fasa gerak asam ortofosfat 0,1% dengan pH 3,5 dan detektor UV-Visible. Standar asam glikolat dan asam laktat dibuat dengan melarutkannya menggunakan asam ortofosfat 0,1% pH 3,5. Hasil eksperimen menunjukkan bahwa pada rentang konsentrasi 25 – 400 μg/mL, asam glikolat dan asam laktat memiliki kurva yang linear dengan koefisien korelasi masing-masing 0,9997 dan 0,9999. Uji presisi untuk larutan standar berkonsentrasi 100 µg/mL menghasilkan simpangan baku relatif sebesar 1,49% untuk asam glikolat dan 1,72% untuk asam laktat. Metode yang telah dioptimasi memberikan akurasi yang baik yang ditunjukkan oleh nilai perolehan kembali dari pengukuran tiga spiked sample dengan konsentrasi berbeda (50, 100, dan 150 μg/mL). Nilai perolehan kembali untuk masing-masing konsentrasi spiked sample adalah 97,12% ± 0,69; 98,76% ± 0,43; 100,80% ± 0,29 untuk asam glikolat dan 97,58% ± 0,39; 96,20% ± 0,68; 98,00% ± 0,38 untuk asam laktat. Batas deteksi dan batas kuantisasi untuk asam glikolat adalah 0,05 dan 0,17 μg/mL, sedangkan untuk asam laktat adalah 1,40 dan 4,67 μg/mL. Nilai kekasaran metode untuk asam glikolat pada hari pertama dan hari kedua adalah 1,43% dan 1,67%, sedangkan untuk asam laktat adalah 1,67% dan 1,25%. Metode yang telah dioptimasi dan divalidasi berpotensi untuk digunakan secara spesifik pada penentuan kadar asam glikolat dan asam laktat dalam krim.Optimization and Validation of Determination Methods of Glycolic Acid and Lactic Acid in Cream Using High-Performance Liquid Chromatography. A high-performance liquid chromatography analytical method for the determination of glycolic acid and lactic acid in creams has been optimized and validated. The separation was performed in a reverse phase C–8 column with a mobile phase of 0.1%, orthophosphoric acid at pH 3.5, and UV-Visible detector. The standard of glycolic acid and lactic acid was dissolved in 0.1% orthophosphoric acid at pH 3.5. The experimental results showed that in the concentration range of 25–400 μg/mL, glycolic acid and lactic acid showed a linear curve with a correlation coefficient of 0.9997 and 0.9999, respectively. The precision test for standard solutions containing 100 µg/mL resulted in a relative standard deviation of 1.49% for glycolic acid and 1.72% for lactic acid. The optimized method provided good accuracy indicated by the recovery of the measurement of three spiked samples in different concentrations (50, 100, and 150 μg/mL). The recovery for each concentration of the spiked sample was 97.12% ± 0.69; 98.76% ± 0.43; 100.80% ± 0.29 for glycolic acid and 97.58% ± 0.39; 96.20% ± 0.68; 98.00% ± 0.38 for lactic acid. The limit of detection and limit of quantization for glycolic acid was 0.05 and 0.17 μg/mL, and for lactic acid was 1.40 and 4.67 μg/mL. The ruggedness of the method for glycolic acid on the first day and second day was 1.43% and 1.67%, while for lactic acid, it was 1.67% and 1.25%. The method that has been optimized and validated shows the potential to be used specifically for the determination of glycolic acid and lactic acid in the cream.
Silver Nanoparticles Capped with p-Hydroxybenzoic Acid for Colorimetric Determination of Cu(II) Dewi Puspita; Gusrizal Gusrizal; Endah Sayekti
Molekul Vol 21 No 2 (2026)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2026.21.2.17298

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ABSTRACT. Silver nanoparticles (AgNPs) have attracted significant attention from researchers and are widely used in the development of chemical sensors due to their unique surface plasmon resonance properties. This study focuses on a colorimetric method for determining Cu(II) using AgNPs capped with p-hydroxybenzoic acid. The AgNPs were synthesized through a chemical reduction process, using p-hydroxybenzoic acid as both a reducing and capping agent. The resulting AgNPs exhibited a yellow color and displayed a characteristic absorption peak at 420 nm, with an average particle size of about 60 nm. These nanoparticles were then used for the colorimetric detection of Cu(II) in the presence of ethylenediaminetetraacetic acid (EDTA), which serves as a ligand. The addition of Cu(II) to the mixture of AgNPs and EDTA induced nanoparticle aggregation, leading to a decrease in absorption intensity at 420 nm and the emergence of a new peak at 680 nm. A linear correlation was established between the concentration of Cu(II) and the absorbance ratio at 680 nm to 420 nm. The limits of detection and quantitation for determining Cu(II) were found to be 0.4 × 10⁻³ M and 1.4 × 10⁻³ M, respectively, with a recovery rate of 104%. These results demonstrate that AgNPs capped with p-hydroxybenzoic acid, combined with EDTA, can provide a simple colorimetric determination of Cu(II) and offer insight into ligand-mediated aggregation behavior in AgNPs-based sensing systems. Keywords: colorimetry; copper; hydroxybenzoic acid; nanoparticles; silver; water
Struktur Dramatik pada Naskah Lakon Ayahku Pulang karya Usmar Ismail Arni Purnamasari; Afri Wita; Gusrizal Gusrizal
TONIL: Jurnal Kajian Sastra, Teater dan Sinema Vol 23, No 2: September 2026
Publisher : Institut Seni Indonesia Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24821/tnl.v23i2.19759

Abstract

Tujuan penelitian ini untuk mengungkap struktur dramatik pada naskah lakon Ayahku Pulang karya Usmar Ismail. Penelitian terdahulu lebih banyak menyoroti aspek nilai moral, karakter, semiotika, dan kritik sosial. Metode penelitian menggunakan deskriptif kualitatif dengan pendekatan teori struktur dramatik David Letwin. Struktur dramatik David Letwin meliputi karakter utama, peristiwa pendorong, cita-cita, rintangan, masa krisis, klimaks, dan resolusi. Naskah lakon Ayahku Pulang menggambarkan kisah keluarga yang ditinggalkan kepala keluarganya. Ia akhirnya pulang dalam keadaan tua dan miskin. Kepulangannya membawa keharuan konflik sekaligus batin di antara keluarga. Hasil analisis menunjukkan bahwa ketujuh komponen dramatik David Letwin hadir secara utuh dalam naskah dan saling terhubung dalam membangun alur cerita emosional dan moral. Tokoh Raden Saleh berperan sebagai pusat dramatik yang menggambarkan pergulatan batin antara penyesalan dan penerimaan. Kesimpulannya, struktur dramatik dalam lakon Ayahku Pulang bukan sekadar rangkaian peristiwa, melainkan refleksi nilai-nilai kemanusiaan yang disampaikan melalui dinamika konflik keluarga. Penelitian ini menegaskan bahwa teori David Letwin efektif digunakan untuk membaca dan mengungkap kontruksi dramatik dalam karya teater Indonesia modern.
Co-Authors Abrori, Sayyidus Dzaki Aderiya Munika Adhitiyawarman, Adhitiyawarman Adhitya Adhitya Afri Wita Agus Wibowo Ajuk Sapar Ajuk Sapar Alifiani Maulida Alimunddin, Andi Hairil Andi Hairil Alimuddin Andi Hairil Alimuddin Andi Hairil Alimuddin Anis Shofiyani Anis Shofiyani Ari Widiyantoro Aritonang, Anthoni Batahan Arni Purnamasari Bambang Rusdiarso Bambang Rusdiarso Chris Octavianus Cucu Suhery Devi Wulandari Dewi Dwi Purwati Dewi Puspita Dewi Puspita Dien, Efraime Caroline Dwi Yuniarsih Eko Sri Kunarti Eko Sri Kunarti Elvi Rusmiyanto Pancaning Wardoyo, Suci Lestari, Mukarlina, Endah Sayekti Endah Sayekti Evi Noviani Firman Shantya Budi, Firman Shantya Hafiz Muhardi Hairunnisa Hairunnisa Hamzi Anwari Harlia, Harlia Hestivera, Eva Novianti Ibnur Rusi Imelda Hotmarisi Silalahi Intan Syahbanu Irma D. Oktavianta Jasmita, Jasmita Krisnanti, Gendis Yayi Lestari, Titiek Mayang Sulistiorini Nasril Fuad Hasan Nelly Wahyuni Normaningsih Rahayu Noverando Rafiel Angelo Nurlina Nurlina Nurlina Nurlina Nurlina, Nurlina Prayitno, Dwi Imam Puji Ardiningsih Radianti, Sri Rahayu, Warsi Kurnia Renny Puspita Sari Risa Nofiani Risa Nofiani Rizki Noviani Ridwan Rizky Noviani Ridwan Roberta Anjelia Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah Salatiana Salatiana Saprianti, Siti Sari, Emilda Sari, Gladis Raspida Shofiyani, Anis Sri Juari Santosa Sri Juari Santosa Sri Juari Santosa Syahbanu, Intan Tariz Zharfan ME Thamrin Usman Thamrin Usman Titik Lestari Titin Anita Zahara Titin Anita Zahara, Titin Anita Titin Anita Zaharah Titin Anita Zaharah Tria Susanti Ummi Hanifah Uray Ristian Uul Warosatul Ambiya Warsi Kurnia Rahayu Warsidah Warsidah Wibowo, M. Agus Wibowo, Muhamad Agus Widiyananta, Surya Winda Rahmalia Winda Rahmalia Winda Rahmalia Yoga Pratama Yudha Arman Zaharah, Titin Anita