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All Journal The Journal of Pure and Applied Chemistry Research Care : Jurnal Ilmiah Ilmu Kesehatan JPPS (Jurnal Penelitian Pendidikan Sains) JPPIPA (Jurnal Penelitian Pendidikan IPA) Jurnal Pijar MIPA Jurnal Pendidikan MIPA Jurnal Ilmiah Ilmu Kesehatan
Titik Taufikurohmah
Jurusan Kimia FMIPA Unesa
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Dentistry Earth & Planetary Sciences Education Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences

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DEVELOPMENT OF SCIENCE TEACHING MATERIALS BASED GUIDED DISCOVERY FOR TRAINING SCIENCE PROCESS SKILLS Imran, Yuliana Anggraini; Agustini, Rudiana; Taufikurohmah, Titik
JPPS (Jurnal Penelitian Pendidikan Sains) Vol 9, No 2 (2020)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpps.v9n2.p1825-1832

Abstract

The purpose of this research is to produce science teaching materials based guided discovery for training science process skills. This study adapted to 4D (four D models) that consists define, design, develop, and disseminate, but the stage is done only to develop stage. Teaching materials include syllabus, RPP, worksheets, student books, and science process skill test. This research tested at SMPN 5 Pamekasan. Feasibility of teaching material from the aspect of validity, practicality and effectiveness. Descriptive data were analyzed quantitatively. The validity results showed that teaching material is very valid. Practicality of teaching material show with the value of implementation learning process is excellent category and is supported by the activity of science process skills that have been shown in the study. The effectiveness of the teaching materials obtained from the increase pretest to posttest results of students science process skills with high category N Gain score and as much as 98% of students responded positively to learning guided discovery model. Based on the results, we can conclude that teaching materials based guided discovery that has been developed has been qualified validity, practicality, and effectiveness so that it can be used to train science process skills.
DEVELOPMENT OF SCIENCE LEARNING MATERIAL WITH SOCIO-SCIENTIFIC ISSUES (SSI) ON CLIMATE CHANGE MATERIALS TO IMPROVE SCIENCE LITERACY OF JUNIOR HIGH SCHOOL STUDENTS Yaumi, Yaumi; madlazim, Madlazim; Taufikurohmah, Titik
Jurnal Penelitian Pendidikan IPA Vol 4, No 2 (2019): Desember 2019
Publisher : Perkumpulan Pendidik IPA Indonesia (PPII)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jppipa.v4n2.p56-63

Abstract

This research aims to produce IPA learning devices with the approach of Socio-Scientific Issues (SSI) on climate change materials to improve the science literacy of Junior high school students. The learning devices developed are syllabus, learning Implementation Plan, Student teaching materials, Student Worksheets, and Science literacy test. This type of research is development research with the model Dick and Carey. Test learning devices in the classroom using one group pre-Test post-Test design. The research instruments in this study are validation sheets, learning implementation observation sheets, activity observation sheets, test sheets, and student response polls. Data collection using validation methods, observations, tests, and polls. Data analysis techniques use quantitative descriptions. The results of the study show that learning devices are declared worthy of validity, practicality, and effectiveness. The validity aspect indicates that the learning device is very valid and reliable. The practicality aspect of the practice of learning has an average 3.66 with excellent criteria and an student activity is very active. The average achievement of science literacy from 32 students in class VII A when pre-test was at level 2 experienced an increase when post-test was at level 4. Based on N-Gain test the value of 0.50 is on medium criteria. Students ' response to the application of a Socio-Scientific Issues (SSI) approach to climate change material is very good.  Learners give a positive response of 87.60%.
Green Synthesis of Gold Nanoparticles Using Bioreductors of Bilimbi Fruit Extract (Averrhoa bilimbi L.) as an Antioxidant Triana, Aan Dimas; Taufikurohmah, Titik
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i5.7323

Abstract

The rapid development of technology today affects the birth of renewable technologies such as nanotechnology. This study reports the results of synthesizing gold nanoparticles with a more environmentally friendly method (green synthesis) using bilimbi fruit extracted through the infusion process. This synthesis method approach can be widely used in biological preparation. This study aims to determine the characteristics of synthesized gold nanoparticles and their potential as antioxidants shown through IC50 intensity. UV-Vis spectrophotometer and TEM were used to analyze the quantitative formation of gold nanoparticles. The analysis used 20, 10, 5, and 2.5 ppm concentration variations. The UV-Vis spectrum characterization results showed a surface plasmon resonance (SPR) of 534-536 nm. The average diameter of the synthesized nanoparticles was 7.98 nm withΩΩ, an approximate overall particle size of 7-12 nm characterized using TEM. Antioxidant activity was carried out using 1,1-diphenyl-2-picrylhydrazyl (DPPH) silencing assay. The percent attenuation at each gold nanoparticle concentration of 20, 10, 5, and 2.5 ppm was 99.4%, 90.7%, 79.5%, and 71.9%, respectively. So, the IC50 value can be obtained at 0.514 ppm, which is included in the strong antioxidant. This shows that gold nanoparticles mediated by bilimbi fruit extract are effective antioxidant agents.
Green Synthesis of Gold Nanoparticles Using Moringa Oleifera Leaf Extract Bioreductor (Moringa oleifera L.) and Activity Test as Antioxidant Indriyani, Ratna; Taufikurohmah, Titik
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i5.7325

Abstract

Gold nanoparticles are inorganic metal materials with sizes ranging from 5-400 nm and are in the form of a suspension solution that undergoes a process of reducing particle size to nano form. This study aimed to determine the results of synthesizing gold nanoparticles (AuNPs) at a concentration of 20 ppm using a bottom-up approach with a green synthesis method characterized using a UV-Vis spectrophotometer and TEM and antioxidant activity test using DPPH. In this study, the synthesis of gold nanoparticles (AuNPs) with a concentration of 20 ppm was carried out using a bottom-up approach with the green synthesis method. The parent solution of HAuCl4 was reduced with Moringa oleifera leaf extract (Moringa oleifera L.) bioreductor, which produced burgundy-colored gold nanoparticles. The results of the characterization of gold nanoparticles using a UV-Vis spectrophotometer obtained the previous wavelength of HAuCl4 of 309 nm. After being synthesized using moringa leaf extract bioreductor (Moringa oleifera L.), the maximum wavelength was shifted to 542.80 nm, with an absorbance value of 0.213. The characterization results using TEM obtained a diverse cluster size of gold nanoparticles with an average length of 6.635 and still in the nanometer size range with the highest frequency at 4-5 nm. The antioxidant activity test of gold nanoparticles was carried out at a concentration variation of 2.5, 5, 10, and 20 ppm, obtaining the percent of free radical suppression sequentially 69, 77, 76, and 83% with an IC50 value <50, which is 0.11 ppm which indicates that the antioxidant activity of gold nanoparticles is extreme. It can be concluded that gold nanoparticles synthesized using Moringa leaf extract have the potential to be a good antioxidant.
UTILIZATION OF NANOGOLD AND NANOSILVER AS DRUGS DELIVERY ON ANTIOXIDANT ACTIVITY IN HERBAL MEDICINE PREPARATION DURING PANDEMIC COVID-19 Dewi, Mareidha Nanda; Taufikurohmah, Titik
Jurnal Ilmiah Ilmu Kesehatan Vol. 1 No. 3 (2023): Volume 1 Nomor 3 Tahun 2023
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jiik.v1i3.4458

Abstract

Tujuan dari adanya penelitian ini adalah untuk mengetahui adanya pengaruh suatu aktivitas penambahan nanogold dan nanosilver dengan menggunakan berbagai macam konsentrasi yang digunakan pada nanogold yang  terhadap aktivitas antioksidan obat herbal yang memiliki bahan dasar ekstrak jintan, ekstrak bawang hitam dan propolis. Berbagai macam konsentrasi nanogold yang digunakan yaitu sebesar 5,10,15,20,25 dan 30 ppm sedangkan konsentrasi nanosilver yang digunakan sebesar 20 ppm. Pada penelitian ini dilakukan uji aktivitas senyawa antioksidan menggunakan metode DPPH dengan menggunakan instrument spektrofotometer UV-Vis. Dalam penelitian ini menunjukkan persentase hasil peredaman radikal bebas pada DPPH. Hasil penelitian ini menunjukan bahwa terdapat pengaruh penambahan nanogold dan nanosilver dalam kandungan antioksidan obat herbal. Konsentrasi nanogold yang terbaik ditunjukkan pada konsentrasi 30 ppm dengan presentase sebesar 84,42%. Hasil menunjukkan bahwa semakin besar konsentrasi nanogold yang ditambahkan maka semakin pula besar persen peredamannya.
Utilization of Nanosilver as An Antifungal To Commercialize Nanomaterial Preservatives Taufikurohmah, Titik; Nabila, Awiddah Zuhroh; Dewi, Arfinda Mulya; Puspitasari, Putri Amalia; Safitri, Elys
The Journal of Pure and Applied Chemistry Research Vol. 14 No. 2 (2025): Edition May-August 2025
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

Nanosilver is a silver-based material with a particle size of less than 100 nm. This study aimed to evaluate the antifungal ability of nanosilver used in a preservative in cosmetic and beverage preparations. The synthesis of nanosilver in this study produced particle with a spherical morphology and sizes ranging from 5-46 nm, with an average size of 28.33 nm and demonstrated good stability. Antifungal tests were in this study were carried out on cosmetic and beverage preparations, namely body lotion, serum, lip balm, and mangrove fruit (Sonneratia caseolaris) syrup. In the body lotion, the percentage of fungi in F0, F1, F2, F3, and F4 was 32.6%, 7.8%, 16.6%, 12.8%, and 11.4%, respectively. In serum samples, the percentage of fungial growth in F0, F1, F2, F3, and F4 was 24.6%, 10.6%, 17.4%, 15.6%, and 12.4%. In lip balm samples, the corresponding values were 30.2%, 5%, 22.6%, 18.2%, and 10.8%. In the mangrove fruit syrup sample, the percentages were 29%, 8.6%, 17%, 14.6%, and 12.2%. From these results, nanosilver at the highest percentage (15%), was unable to defeat the antifungal effectiveness of conventional preservatives.
Antifungal activity test of nanosilver in serum cosmetic preparations Puspitasari, Putri; Taufikurohmah, Titik
Jurnal Pijar Mipa Vol. 18 No. 6 (2023): November 2023
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v18i6.5630

Abstract

Serum is one of the cosmetic products that people often use today. Along with the times and technological developments, innovations in serum products are also increasing with the addition of active ingredients. Nanosilver is one of the nanotechnology findings and is known as a good antifungal. In this study, serum products were made with the addition of nanosilver as an antifungal, with variations in the acquisition of 20 ppm nanosilver by 5, 10, and 15%. This study aims to determine the characteristics of nanosilver synthesized using UV-Vis Spectrophotometer and TEM, determine the physical and chemical characteristics of nanosilver serum preparations, and determine the antifungal activity of nanosilver in serum cosmetic preparations. In this study, the synthesis of nanosilver using a chemical reduction method with sodium citrate as a reducing agent and stabilizer. Characterization of nanosilver with UV-Vis Spectrophotometer showed that the synthesized nanosilver was relatively stable, and the results of description with TEM showed that the nanosilver produced was on the nanoscale with an average diameter of 35.075 nm and spherical shape. The physical and chemical characteristics of the serum preparation carried out by organoleptic testing showed that the five samples were homogeneous, non-irritating, and had a pH of 6. Testing of nanosilver antifungal activity was carried out by the DMC (Direct Microscopic Count) method with direct counting techniques under a microscope for eight weeks. Based on the calculation results, from week 0 to week 8, it shows that the serum preparation with the addition of nanosilver can inhibit fungi with the growth of the number of hyphae in F1, F2, F3, F4, F5 respectively 24.25; 22.25; 3.25; 3; and 2.75%.
Green Synthesis Gold Nanoparticles using Bioreductor of Butterfly Pea (Clitoria ternatea L.) Leaf Extract as an Antioxidant Fernanda, Cintya Dita; Taufikurohmah, Titik
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i4.7170

Abstract

Gold nanoparticles are inorganic metal materials in suspended solutions with a particle size reduction process to the 5-400 nm nanoscale range. Gold nanoparticles can be synthesized using the green synthesis method using a bioreductor of butterfly pea leaf infusion extract, which can be used as an antioxidant. This study aimed to determine the characteristics of gold nanoparticles using a UV-Vis spectrophotometer and TEM and to determine the antioxidant strength of gold nanoparticles through the IC50 value. This study used 20, 10, 5, and 2.5 ppm concentration variations. The results of the characterization of gold nanoparticles using a UV-Vis spectrophotometer showed a maximum wavelength of 550 nm, and the results of the TEM test showed a particle diameter of 6.58 nm. The antioxidant activity test was carried out using the 1,1-diphenyl-2-picryhydrazyl (DPPH) quenching method, resulting in % quenching at a concentration of 20, 10, 5 and 2.5 ppm of 76.3; 70.6; 85.5; and 92.9% and an IC50 value of 0.25 ppm which is included in strong antioxidants. It can be concluded that gold nanoparticles synthesized using butterfly pea leaf extract have the potential to be an effective antioxidant agent.
Green Synthesis Gold Nanoparticles using Bioreductant Red Shoot Leaf Extract (Syzygium myrtifolium Walp.) and Activity as Antioxidant Farihah, Neni Isna; Taufikurohmah, Titik
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i4.7171

Abstract

Gold nanoparticles (AuNPs) are small-sized materials important in various commercial and industrial applications. Several methods have been developed to synthesise AuNPs. This study was conducted by synthesizing AuNPs using HAuCl4 as a precursor and red shoot leaf extract as a bioreductor. The concentrations of AuNPs used were 20, 10, 5, and 2.5 ppm. Characterization of gold nanoparticles at a concentration of 20 ppm was carried out using a UV-Vis spectrophotometer to measure the maximum wavelength and Transmission Electron Microscopy (TEM) to determine particle size. Antioxidant activity at 20, 10, 5, and 2.5 ppm was determined by measuring free radical capture activity using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. The results showed that gold nanoparticles had a maximum wavelength of 530 nm with a ruby red color and an average particle size of 14.907 nm. The synthesized AuNPs showed high antioxidant activity: 99.6% (20 ppm), 98.9% (10 ppm), 96.7% (5 ppm), and 91.0% (2.5 ppm), indicating that higher concentrations of AuNPs resulted in more significant free radical scavenging. This study successfully synthesized gold nanoparticles using red shoot leaf extract as an environmentally friendly bioreduction. The resulting nanoparticles have a nanometer particle size with very high antioxidant activity, especially at a concentration of 20 ppm. The method used in this study offers a more environmentally friendly alternative for synthesizing gold nanoparticles, which previously often used hazardous chemicals. The use of red shoot leaf extract as a bioreductor has not been widely reported in the literature, thus providing a new contribution to green nanotechnology. Further research is recommended to explore the potential applications of gold nanoparticles synthesized by this method in medical and other industrial fields. In addition, additional studies are needed to optimize the synthesis conditions and more in-depth characterization of the stability and toxicity of gold nanoparticles in practical applications.
The Development of Plant E-Atlas for Acid-Base Test Indicators as Supporting Teaching Materials During the Covid-19 Pandemic Putri, Raddina Aprilia; Susantini, Endang; Taufikurohmah, Titik
Jurnal Pendidikan MIPA Vol 22, No 1 (2021): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research is a type of research and development. Plant E-Atlas for Acid –Base Test Indicators was developed with the aim of being used as interactive teaching material especially in the online learning process during the Covid-19 pandemic. The E-Atlas development procedure uses the Dick and Carrey model. Eligibility Levels of the E-Atlas are evaluated based on the assessment of experts and field practitioners. The effectiveness of the practicality of the E-Atlas is analyzed based on the responses of the E-Atlas users. The respondents were students at the grade X SMK Kesehatan Yannas Husada Bangkalan SMK. The average feasibility score of the E-Atlas is 90.18% with very valid criteria and 89.08% with reliable criteria. Practicality of the E-Atlas obtained an average score of 86.10%. The results of research and development of the E-Atlas show that the E-Atlas designed can be used to support online learning. In addition, the results of the assessments of experts, educational practitioners, and respondents show that the E-Atlas contains content to train Scientific Reasoning Skill. Keywords: Plant E-Atlas, online learning, scientific reasoning DOI:http://dx.doi.org/10.23960/jpmipa/v22i1.pp35-44
Co-Authors Dewi, Arfinda Mulya Dewi, Mareidha Nanda ENDANG SUSANTINI ERLITA DAMAYANTI, NURMA Farihah, Neni Isna Fernanda, Cintya Dita Imran, Yuliana Anggraini Madlazim Madlazim Nabila, Awiddah Zuhroh Ningtias, Savira Ayu NOVITA SARI, DIA Puspitasari, Putri Amalia Putri Puspitasari Putri, Raddina Aprilia Rachmawati, Yulle Ratna Indriyani Rudiana Agustini Rusmini Rusmini Safitri, Elys Triana, Aan Dimas Yaumi, Yaumi