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All Journal Jurnal Pendidikan dan Pembelajaran Khatulistiwa (JPPK) Jurnal Teknik Kimia USU The Journal of Experimental Life Sciences (JELS) JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Science and Technology Indonesia Walisongo Journal of Chemistry Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Jurnal Teknik Kimia JCER (Journal of Chemistry Education Research) Jurnal Inovasi Teknik Kimia Abdimas: Jurnal Pengabdian Masyarakat Universitas Merdeka Malang Journal of Disruptive Learning Innovation (JODLI) Jurnal Teknik Kimia USU Journal of Medical Science; Jurnal Ilmu Medis Rumah Sakit Umum Daerah dr. Zainoel Abidin, Banda Aceh J-PEK (Jurnal Pembelajaran Kimia)
Nazriati Nazriati dkk.
Universitas Negeri Malang
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Dentistry Education Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Neuroscience Nursing Physics Public Health Other

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Biosintesis dan Karakterisasi Nanopartikel Seng Oksida (ZnO-NPs) Menggunakan Ekstrak Daun Kenitu (Chrysophyllum cainito L.) Syamsul Arifin, Fawaid; Nazriati
Jurnal Teknik Kimia USU Vol. 11 No. 2 (2022): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v11i2.9127

Abstract

Nanoparticles are materials that have superior properties compared to similar materials that are larger in size when used as raw materials. One of the nanoparticles that is trending and has many applications is zinc oxide nanoparticles (ZnO-NPs). This study aimed to synthesize ZnO-NPs using kenitu leaf extract (Chrysophyllum cainito L.) and determine the effect of extract composition and pH on the size of ZnO-NPs. Kenitu leaf extract can prevent agglomeration in the synthesis of nanoparticles because it contains secondary metabolites such as antioxidants and polyphenols. ZnO-NPs were synthesized using green method by reacting kenitu leaf extract with zinc sulfate. The success of the synthesis was indicated by the similarity of the peaks of the synthesized compounds to the standard peaks of ZnO in X-Ray Diffraction (XRD) analysis and supported by the presence of Zn-O vibrations in the 405-768 cm-1 region in Fourier Transform Infra-Red (FTIR) analysis. Analysis of UV-Vis spectra showed that ZnO-NPs were relatively stable at wavelength of 308-330 nm with an absorption peak at 317 nm and a bandgap energy of 3.25 eV. The results of FTIR characterization showed the presence of vibrations of the carbonyl and hydroxy groups in kenitu leaf extract. The results of the Scanning Electron Microscope (SEM)  characterization showed that the ZnO-NPs synthesized using 10 mL kenitu leaf extract at pH 7 with 0.15 M zinc sulfate had predominantly spherical shape with a size of 14.10 nm. Based on experiment result addition of kenitu leaf extract may reduce the size of ZnO-NPs, while increase of mixture pH during formation reaction of ZnO-NPs may increase the size of ZnO-NPs.
Synthesis and Characterization of Hydroxyapatite Composites Based on Tutut (Belamya Javanica) and Magnetite by Coprecipitation as Adsorbents of Pb Metals Ion Charlena; Nazriati; Marita Soebrata, Betty; Dicky Iswara, Muhammad
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.2025.10.1.111-122

Abstract

Increased industrial activity can result in the emission of pollutants into the environment, such as heavy metals, which are a significant source of concern. A practical approach to reduce this problem is to utilize Pb metal adsorption. This study aims to synthesize HAp from Bellamya javanica clam shells and characterize the HAp-Fe3O4 composite as a Pb metal ion adsorbent. FTIR and XRD analysis results showed the successful fabrication of the composite, resulting in a crystal dimension of 7.63 nm and a crystallinity level of 84.80%. SEM characterization showed a porous structure with a particle size of 10.98 um. Adsorption studies of Pb(II) ions showed that the HAp-Fe3O4 composite efficiently adsorbed Pb(II) ions, with the adsorption efficiency increasing from 95.80% to 98.40%. The adsorption isothermal model of the HAp-Fe3O4 composite follows the Freundlich model with a 1/n value of 0.31 and a KF value of 25.35 L/g. The adsorption kinetics study of the HAp-Fe3O4 composite follows the pseudo second-order model with an R2 value of 1, and the thermodynamic study shows the Gibbs free energy is negative, which indicates that the adsorption process is thermodynamically optimal and spontaneous. In addition, the enthalpy value is positive, indicating that the interaction between the adsorbent and lead ions is endothermic, and the entropy is negative, indicating the reduction of random collisions of lead ions in the solid (adsorbent) and aqueous solution during adsorption.
Pengaruh Terapi Qur'anic Healing dengan Glasgow Coma Scale dan Vital Sign pada Pasien Penurunan Kesadaran di RSUD dr. Zainoel Abidin Fithriany; Sabrizal Ishak; Rima Novita Sari; Nasaie; Firly Ratsmita; Nazriati
Journal of Medical Science Vol 4 No 1 (2023): Journal of Medical Science
Publisher : LITBANG RSUDZA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55572/jms.v4i1.74

Abstract

Qur’anic healing merupakan sebuah teknik terapi penyembuhan dengan cara membacakan ayat-ayat Al-Quran yang mu’tabaroh kepada pasien sesuai  ketentuan Al-Quran dan As-Sunnah sebagaimana dicontohkan pada masa Rasulullah SAW.Penurunan kesadaran merupakan kondisi dimana otak mengalami defisiensi fungsi yang disebabkan oleh berbagai macam penyakit seperti stroke, diabetes melitus, trauma, sepsis dan lain-lain. Penelitian ini dilakukan diruang  High Care Unit Medical RSUDZA dengan responden pasien yang mengalami penurunan kesadaran akibat sepsis. Penelitian ini bertujuan untuk mengetahui pengaruh terapi qur’anic healing dalam mempengaruhi outcome pasien dengan penurunan kesadaran akibat sepsis menggunakanGlasgow Coma Scale(GCS) dan Vital Sign. Metode penelitianQuasi Experimentaldengan two grup pre-post test design dan teknik pengambilan sampel consecutive sampling dengan subjek penelitian sesuai kriteria inklusi dan eklusi. Subjek penelitian sebanyak 24 responden dibagi dua kelompok perlakuan. Kelompok satu 12 reponden mendapatkan perlakuan terapi qur’anic healing dilakukan langsung oleh ustadz/ah, kelompok dua 12 reponden mendapatkan perlakuan terapi qur’anic healing dengan cara memperdengarkan audio. Hasil analisis uji-T yang membandingkan perubahan GCS dari dua metode perlakuan secara langsung atau memperdengarkan audio menunjukkan p-value= 0,001 (≤0,05). Dapat disimpulkan bahwa perbedaan GCS metode langsung dan audio adalah nyata. Sedangkan Uji mann whitney membandingkan perubahan vital sign dari dua metode perlakuan, menunjukkan ada pengaruh metode terhadap perubahan vital sign. Hasil uji mann whitneyberturut turut systole, diastole, nadi, respirasi, dan suhu=0.317, 0.317, 1.00, 1.00, 0.546 yang semuanya > dari 0.05 maka perbedaan vital sign metode langsung dan audio adalah tidak nyata. Walaupun tidak nyata ada kecenderungan vital sign dari metode langsung lebih baik dibandingkan metode audio di setiap aspek yang diamati kecuali di aspek nadi yang perubahan keduanya sama. Kesimpulan pada penelitian ini adalah terapi qur’anic healing berpengaruh terhadap kestabilan vital sign sertapeningkatan GCS pada pasien yang mengalami penurunan kesadaran.
Textile Industry Waste Pollution in the Konto River: A Comparison of Public Perceptions and Water Quality Data Adjid, Galang Ayuz Firstian Adjid; Kurniawan, Andi; Nazriati, Nazriati
The Journal of Experimental Life Science Vol. 12 No. 3 (2022)
Publisher : Graduate School, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jels.2022.012.03.05

Abstract

Textile industry production activities in one of the Badas areas can have implications for the occurrence of dye liquid waste pollution in the Konto river flow. This implication leads to the public perception that there has been river pollution from textile dyeing liquid waste. In this case, public perceptions need to be analyzed as a form of river environmental monitoring activities. Therefore, public perceptions of pollution were compared with actual water quality data, especially related to dyes in river water, to link public perceptions with environmental resource management efforts. This study aims to analyze public perceptions of textile dye waste pollution and compare the analysis results with the river water quality analysis. Analysis of river water quality (dye content, BOD, COD) was conducted at five sampling points in Badas, Kuwik, Balungjeruk, and Wonorejo villages. Public perception was measured descriptively through interviews with respondents referring to the Slovin method. The analysis of public perceptions shows that the Public considers that there has been pollution of river water, mainly due to textile industry waste, along the Konto River. The results of the water quality analysis showed that dye concentrations were found at four sampling points except for Wonorejo Village. This result shows that the correlation between public perception and data on dye contamination only occurs in Badas, Kuwik, and Balungjeruk villages. In addition, the BOD/COD ratio indicates that pollution has occurred at all observation points in this study. Keywords:  Aquatic Ecosystem, Dyes, Pollution, Public Perception, Waste.
Sintesis Nanohibrida Silika-urea Berbasis Abu Bagasse sebagai Pupuk Lepas Lambat Ramah Lingkungan Siti Muslimah; Nazriati; Neena Zakia
Jurnal Teknik Kimia USU Vol. 14 No. 2 (2025): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v14i2.21629

Abstract

The urea–silica nanohybrid is an innovative slow-release fertilizer designed to enhance nitrogen use efficiency in agriculture. This study synthesized the nanohybrid using silica sourced from bagasse ash via the sol-gel method. Silica was extracted by reacting the ash with sodium hydroxide to form sodium silicate, which was then converted into silicic acid through ion exchange using a cation resin. Ammonium hydroxide was added to adjust the pH to 5, forming a gel at room temperature. The gel was aged for 18 hours to strengthen its structure, then freeze-dried to produce hydrophilic silica aerogel. To form the nanohybrid, 1 g of silica aerogel was mixed with urea at varying concentrations, stirred for 24 hours, filtered, and dried at 40 °C. Characterization using Fourier Transform Infrared Spectroscopy (FTIR) confirmed the presence of Si–O–Si and Si–OH groups, along with urea-specific bands (C=O and N–H), indicating successful integration of urea into the silica matrix.
Sintesis Nanohibrida Silika-urea Berbasis Abu Bagasse sebagai Pupuk Lepas Lambat Ramah Lingkungan Siti Muslimah; Nazriati; Neena Zakia
Jurnal Teknik Kimia USU Vol. 14 No. 2 (2025): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v14i2.21629

Abstract

The urea–silica nanohybrid is an innovative slow-release fertilizer designed to enhance nitrogen use efficiency in agriculture. This study synthesized the nanohybrid using silica sourced from bagasse ash via the sol-gel method. Silica was extracted by reacting the ash with sodium hydroxide to form sodium silicate, which was then converted into silicic acid through ion exchange using a cation resin. Ammonium hydroxide was added to adjust the pH to 5, forming a gel at room temperature. The gel was aged for 18 hours to strengthen its structure, then freeze-dried to produce hydrophilic silica aerogel. To form the nanohybrid, 1 g of silica aerogel was mixed with urea at varying concentrations, stirred for 24 hours, filtered, and dried at 40 °C. Characterization using Fourier Transform Infrared Spectroscopy (FTIR) confirmed the presence of Si–O–Si and Si–OH groups, along with urea-specific bands (C=O and N–H), indicating successful integration of urea into the silica matrix.
UTILIZATION OF BAGASSE ASH FOR THE PREPARATION OF SILICA AEROGEL/MgO COMPOSITES THROUGH AMBIENT-PRESSURE DRYING Azhar, Istighfarin Meilidya; Nazriati, Nazriati; Kusumaningrum, Irma Kartika
Walisongo Journal of Chemistry Vol. 8 No. 2 (2025): 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.v8i2.27564

Abstract

This study presents the preparation of silica aerogel/MgO composites using bagasse ash as a silica source and MgCl₂·6H₂O as the MgO precursor. Sodium silicate was extracted from bagasse ash and converted into silicic acid through ion-exchange treatment. Silica aerogel formation was achieved through gelation, followed by surface modification using TMCS and HMDS. Magnesium oxide was incorporated via co-precipitation with MgCl₂·6H₂O and subsequently stabilized through calcination. The composites were characterized using FTIR, XRD, and BET–BJH analyses. XRD results revealed a hybrid amorphous–crystalline structure, with silica predominantly in the amorphous phase and MgO in the crystalline phase. BET analysis showed a pore volume of 0.50 cm³/g and a specific surface area of 121.99 m²/g, while the pore-size distribution confirmed its mesoporous nature. FTIR spectra indicated the presence of functional groups corresponding to Si–O–Si, Si–C, C–H, and Mg–O, confirming the successful integration of MgO into the silica aerogel framework. These findings demonstrate the successful preparation of silica aerogel/MgO composites from bagasse ash under ambient-pressure drying conditions.
NaOH-MODIFIED ACTIVATED CARBON FROM CORNCOBS AS A HETEROGENEOUS CATALYST: SYNTHESIS AND APPLICATION IN ULTRASOUND-ENHANCED TRANSESTERIFICATION OF USED COOKING OIL Santana, Rosanina Kartika; Aliyatulmuna, Adilah; Nazriati, Nazriati; A'yun, Amalia Qurrata
Walisongo Journal of Chemistry Vol. 8 No. 2 (2025): 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.v8i2.28915

Abstract

Biodiesel is an alternative fuel composed of fatty acid methyl esters that can be synthesized from renewable sources and offers lower combustion emissions compared to fossil fuels. In this study, biodiesel was produced via a transesterification reaction using a basic heterogeneous catalyst derived from corncob carbon, which was activated and surface-modified with NaOH to create active catalytic sites. XRD and FTIR analyses confirmed the presence of Na₂CO₃ and Na₂O, while SEM-EDX revealed a porous surface morphology with uniformly distributed sodium. Used cooking oil (UCO) served as the triglyceride source after undergoing degumming, neutralization, and adsorption processes to reduce free fatty acid (FFA) content. The transesterification reaction was conducted in an ultrasonic water bath using the reflux method at 60°C with an oil-to-methanol molar ratio of 1:12. The optimum reaction conditions were achieved using 0.5 wt% catalyst and a reaction time of 120 minutes, yielding 73.15% biodiesel. The quality of the biodiesel produced under optimum conditions was evaluated based on density, viscosity, acid value, and calorific value, which were 857 kg/m³, 3.8743 cSt, 0.2504 mg KOH/g, and 11,168 cal/g, respectively. These values comply with the quality requirements specified in SNI 04-7182-2015. GC-MS analysis confirmed that the major components of the biodiesel were methyl oleate and methyl palmitate. The utilization of corncob waste as a sustainable catalyst support, combined with alkali modification and ultrasonic enhancement, offers improved catalytic efficiency under mild operating conditions. This eco-friendly catalyst demonstrates strong potential for green catalytic processes in renewable energy development.
ENHANCING METACOGNITIVE AND CREATIVE THINKING SKILLS IN CHEMISTRY EDUCATION: THE ROLE OF COLLABORATIVE PROJECT-BASED LEARNING AND STUDENT RESPONSIBILITY Muhammad Farhan Ivan Phalosa; Rusly Hidayah; I Wayan Dasna; Parlan; Nazriati
JCER (Journal of Chemistry Education Research) Vol. 10 No. 1 (2026): Volume 10 No. 1 June 2026
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jcer.v10n1.p43-52

Abstract

The integration of metacognitive and creative thinking skills plays a crucial role in equipping STEM students with the necessary competencies to address complex, real-world challenges. This quasi-experimental study investigates the effectiveness of Collaborative Project-Based Learning (CPjBL) supplemented with Electronic Worksheets (E-LKM) in enhancing these essential skills among undergraduate chemistry students (N=52), while examining the moderating effect of student responsibility. The research employed a comparative approach between CPjBL and Project-Based Learning (PjBL) methodologies. Results demonstrated that CPjBL significantly outperformed conventional PjBL in developing both metacognitive skills (with an N-Gain of 0.76 compared to 0.66) and creative thinking abilities (N-Gain of 0.87 versus 0.70). Notably, the benefits were particularly pronounced among students exhibiting high levels of personal responsibility (p < 0.05). Further statistical analysis through univariate ANOVA revealed a significant interaction effect between the CPjBL approach and student responsibility (F = 2.084, p = 0.013), indicating that the effectiveness of the collaborative learning method is substantially influenced by learners' degree of accountability. This finding suggests that while CPjBL represents a powerful pedagogical tool, its implementation should consider students' readiness to take responsibility for their learning process. The study provides empirical evidence supporting CPjBL as an effective framework for cultivating 21st-century skills in chemistry education. The findings have important implications for instructional design, highlighting the need to incorporate collaborative, technology-enhanced learning strategies while simultaneously fostering students' sense of responsibility. Additionally, the research underscores the importance of professional development programs to equip educators with the necessary skills to implement these innovative teaching approaches effectively.
Chemistry Tryout Instrument of the PPG BGT: A Pedagogical Content Knowledge Framework Oktavia Sulistina; Nazriati
J-PEK (Jurnal Pembelajaran Kimia) Vol. 11 No. 1 (2026): J-PEK (Jurnal Pembelajaran Kimia)
Publisher : Department of Chemistry, Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977//um026v11i12026p038

Abstract

This study aims to develop chemistry tryout assessments for the Teacher Professional Education Program (PPG) for Specific Teachers (BGT) as an effort to improve the quality of assessment and enhance teachers’ readiness in facing examinations. The research was conducted using development and research procedures adapted to the characteristics of the product, namely an assessment instrument. The product generated consists of 11 chemistry tryout items test for PPG BGT, which have been tested for quality through content validation and empirical validation. The developed questions are based on Pedagogical Content Knowledge (PCK) and refer to the four core competencies of PPG graduates. The question formats include simple multiple-choice and complex multiple-choice items, all of which were found to be valid and high reliability.
Co-Authors A'yun, Amalia Qurrata Adilah Aliyatulmuna Adjid, Galang Ayuz Firstian Adjid Adrian Nur Adrian Nur Ahmad Gilang Indra Salam Aman Santoso Andi Kurniawan Arif Jumari Armiati, Sri Eni Aunurrahman Aunurrahman Azhar, Istighfarin Meilidya Bertalina Timanoyo Charlena Ciptawati, Endang Danar Danar Dicky Iswara, Muhammad Effendy Effendy Effendy Effendy Effendy Effendy Efrilia R Rahmawati Fania Faradila Yuniarizky Fauziatul Fajaroh Firly Ratsmita Fithriany Hayuni Retno Widarti I Wayan Dasna Indri Astuti Isnaini Yunitasari Jundi Rofi’uddien Kusumaningrum, Irma Kartika Lailatur Rizqiyah Marita Soebrata, Betty Muhammad Abdul Basir Muhammad Farhan Ivan Phalosa Nasaie Neena Zakia Nuril Mega Musfita Oktavia Sulistina Parlan . Putra, Vahemas Aditya pamila Rahayu Isma Rima Novita Sari Rusly Hidayah Sabrizal Ishak Santana, Rosanina Kartika SITI MUSLIMAH Siti Shohibul Wahidah Suharti Sumari Sumari Syamsul Arifin, Fawaid Yahmin Yahmin Yudhi Utomo