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All Journal JURNAL KIMIA SAINS DAN APLIKASI Pharmaciana: Jurnal Kefarmasian Bulletin of Chemical Reaction Engineering & Catalysis Indonesian Journal of Chemistry Indonesian Journal of Natural Pigments Jurnal Bakti Untuk Negeri
Leny Yuliati
Universitas Ma Chung
Chemical Engineering, Chemistry & Bioengineering Chemistry Dentistry Engineering Health Professions Medicine & Pharmacology Nursing Public Health Other

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Preparation of Green-Emissive Zinc Oxide Composites Using Natural Betacyanin Pigment Isolated from Red Dragon Fruit Yehezkiel Steven Kurniawan; Hendrik Oktendy Lintang; Leny Yuliati
Indonesian Journal of Chemistry Vol 21, No 1 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.52351

Abstract

In this work, we reported the synthesis of green-emissive composite materials of zinc oxide (ZnO) and isolated betacyanin pigment from red dragon fruit (RDF) extract utilizing organic linkers, i.e. (3-chloropropyl)trimethoxysilane (CPTMS) and (3-aminopropyl)trimethoxysilane (APTMS). Betacyanin was extracted using a maceration technique, while CPTMS-ZnO and APTMS-ZnO were prepared by mixing ZnO and the respective organic linker in ethanol. The obtained ZnO/CPTMS and APTMS-ZnO composites were separately added into the RDF extract, followed by stirring at room temperature for 24 h. As high as 80 and 90% of betacyanin was successfully impregnated onto CPTMS-ZnO and APTMS-ZnO, respectively. A comparison study was made by preparing RDF-CPTMS and RDF-APTMS first and then introducing them onto ZnO. In this case, as high as 81 and 100% of betacyanin in RDF-CPTMS and RDF-APTMS, respectively, were impregnated onto ZnO. These results revealed that APTMS was a better organic linker than CPTMS and the order of the steps to introduce APTMS was important. The presence of betacyanin on the composite materials was confirmed by FTIR and fluorescence spectroscopy. All the composite materials had an excitation signal at 426–428 nm and emission signals at 459 and 517–518 nm, demonstrating their promising application as green-emissive materials.
Improving the Performance of Zinc Oxide Photocatalysts for Phenol Degradation through Addition of Lanthanum Species Wynona Agatha Nimpoeno; Hendrik Oktendy Lintang; Leny Yuliati
Jurnal Kimia Sains dan Aplikasi Vol 23, No 4 (2020): Volume 23 Issue 4 Year 2020
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3293.592 KB) | DOI: 10.14710/jksa.23.4.109-116

Abstract

One green approach to degrade organic pollutants, such as phenol, is through the photocatalytic reaction. Despite having large band gap energy, which is enough for phenol degradation, zinc oxide (ZnO) has low photocatalytic efficiency. In this study, ZnO was modified by lanthanum (La) species, and the improved photocatalytic activity was confirmed for degradation of phenol under visible and ultraviolet (UV) light irradiation. The ZnO and its modified photocatalysts were prepared by the hydrothermal method in the absence and presence of La species (0.01‒2 wt%). X-ray diffraction (XRD) patterns showed that the addition of La did not disturb the structure of ZnO, but slightly decreased the crystallite size. While the La addition up to 1 wt% did not affect the optical properties of the ZnO, the addition of 2 wt% La slightly red-shifted the absorption band edge of the ZnO. The Fourier-transform infrared (FT-IR) spectra showed La oxide formation observed at 515-540 cm-1 after 2 wt% La addition. Fluorescence emission spectra revealed that synthesized ZnO has oxygen vacancies at 558 nm, and the presence of 1 wt% La did not significantly affect the emission intensity. The photocatalytic activity of ZnO was influenced by the La addition, where the best performance was obtained on the ZnO with 1 wt% La. This study demonstrated that the optimum amount of La species could increase the performance of the ZnO.
PERMAINAN EDUKATIF UNTUK MENINGKATKAN PENGETAHUAN TENTANG KEBERSIHAN KUKU DI TK DHARMA WANITA PERSATUAN I SUMBERSEKAR Yulinda Cesa, Fibe; Yuliati, Leny; Setya Dhini, Ellyvina; Tamara, Aulia; Cinta Sari, Yunda; B. Maharani, Novia
Jurnal Bakti untuk Negeri Vol 5 No 1 (2025): Jurnal Bakti Untuk Negeri
Publisher : Sekolah Tinggi Ilmu Kesehatan ISFI Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36387/j3g2fv44

Abstract

Personal hygiene, especially nail hygiene, is a basic need that should be cultivated from an early age. Neglecting this can lead to a decline in awareness of personal hygiene and increase the risk of infectious diseases later in life. Kindergarten students, aged 4-5 years, are not fully aware of this. The methods employed include socialization; initial discussion and situational analysis; material preparation; questionnaire validity and reliability testing; socialization of the activity plan; activity implementation; monitoring and evaluation, and discussion. In this case, the educational module includes instructional materials, educational games as visual aids, and mini experiments. The counseling activity was conducted by providing instructional materials on proper handwashing followed by a mini handwashing experiment. After this activity, it continued with an educational material on nail cutting and its experiment. Based on the average student scores before and after the counseling, there was an increase in the average student score from 66 to 80 (p-value = 0.002*). Thus, this counseling has a significant impact on increasing students' knowledge and average scores.
Co-Authors Adhiwibawa, Marcelinus Alfasisurya Setya B. Maharani, Novia Cinta Sari, Yunda Edi Setiyono Hendrik Oktendy Lintang Hendrik Oktendy Lintang Hendrik Oktendy Lintang Hendrik Oktendy Lintang Juliana Juliana Kesuma, Ruth Febriana Krisfian Tata Aneka Priyangga Kurniawan, Yehezkiel Steven Mohd Hayrie Mohd Hatta Monica, Eva Nur Azmina Roslan Nur Fatiha Ghazalli Priyangga, Krisfian Tata Aneka Purnomo, Tantyo Ardy Bintoro Renny Indrawati, Renny Rollando, Rollando S. Alfisyah Nur Aziza Sandra Dewi Tansil Setya Dhini, Ellyvina Siew Ling Lee Tamara, Aulia Wai Ruu Siah Wynona Agatha Nimpoeno Yehezkiel Steven Kurniawan Yehezkiel Steven Kurniawan Yehezkiel Steven Kurniawan Yulinda Cesa, Fibe Yuyun Yuniati