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All Journal International Journal of Advances in Applied Sciences Jurnal Bahan Alam Terbarukan Sainteknol : Jurnal Sains dan Teknologi Seminar Nasional Teknik Kimia Kejuangan Indonesian Journal of Chemistry AMALIAH: JURNAL PENGABDIAN KEPADA MASYARAKAT RANDANG TANA - Jurnal Pengabdian Masyarakat PENGABDI: Jurnal Hasil Pengabdian Masyarakat REACTOR : Journal of Research On Chemistry And Engineering
Dewi Selvia Fardhyanti
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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MISCONCEPTION REMEDIATION OF ATOMIC ORBITAL, MOLECULAR ORBITAL, AND HIBRIDIZIATION CONCEPTS BY COMPUTER ASISSTED INSTRUCTION WITH ANIMATION AND SIMULATION MODEL Sri Mursiti; Dewi Selvia Fardhyanti; Edy Cahyono; Sudarmin Sudarmin
Indonesian Journal of Chemistry Vol 6, No 1 (2006)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (211.997 KB) | DOI: 10.22146/ijc.21784

Abstract

The research of Computer Asissted Instruction with animation and simulation was used to misconception remediation of atomic orbital, molecular orbital, and hibridiziation concepts. The applicated instruction model was focused on concept approach with macromedia flash player and power point programme. The subject of this research were the 2nd semestre students of Chemistry Department. The data were collected by using of true-false pre-test and post- test followed by the reason of its. The analysis reveals that the Computer Asissted Instruction with animation and simulation model increased the understanding of atomic orbital, molecular orbital, and hibridiziation concepts or remediation of concepts missconception, shown by the significant score gained between before and after the implementation of Computer Asissted Instruction with animation and simulation model. The instruction model developed the students's generic skills too.
An overview of the potential of Citrus hystrix (kaffir lime) essential oil as mosquito repellent Nurul Asyikin Md Zaki; Junaidah Jai; Izzat Syahmi Kamal Shahrizan; Dewi Selvia Fardhyanti; Megawati Megawati; Nadya Alfa Cahaya Imani
International Journal of Advances in Applied Sciences Vol 11, No 4: December 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (290.133 KB) | DOI: 10.11591/ijaas.v11.i4.pp360-366

Abstract

A chemical-based insect repellent such as N, N-diethyl-3-methylbenzamide (DEET) is commonly used against all insects despite its toxicity in humans. Hence, a repellent agent from natural sources of plant essential oil was introduced. Some of the plants which have the repellent potential are catnip, hairy basil, citronella, vetiver, clove, and citrus. Citronellal, citronellol, geraniol, eugenol, eugenol-acetate, and beta-caryophyllene are among the repellent active components in these plants. Citrus hystrix (kaffir lime) was known for several applications in food, health, and skincare, but its potential as mosquito repellent is still new. This overview paper highlights the potential of kaffir lime essential oil as a mosquito repellent and the encapsulation of essential oil related to mosquito repellent. Several studies on kaffir lime essential oil as mosquito repellent was conducted and revealed that the major repellent active components are citronellol and limonene. Pure kaffir lime essential oil provides one-hour repellent protection against the mosquito. However, an addition of 5% vanillin prolongs the protection time to three hours. Essential oil is easily vaporized at room temperature which shortens its effectiveness time. Encapsulation of the essential oil would control the vaporization process and hence prolong its efficiency. Nonetheless, almost no research work reported on the encapsulation of kaffir lime essential oil and the release mechanism of the encapsulated kaffir lime.
Pelatihan Pemanfaatan Ekstrak dari Limbah Eceng Gondok pada Pembuatan Hand Sanitizer sebagai Antiseptik Alami Haniif Prasetiawan; Bayu Triwibowo; Maharani Kusumaningrum; Zuhriyan Ash Siddieqy Bahlawa; Dewi Selvia Fardhyanti; Dewi Artanti Putri
Randang Tana - Jurnal Pengabdian Masyarakat Vol 5 No 3 (2022): Randang Tana - Jurnal Pengabdian Masyarakat
Publisher : Unika Santu Paulus Ruteng

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36928/jrt.v5i3.1289

Abstract

This article aims to describe the use of water hyacinth leaves as an ingredient for making hand sanitizers or natural antiseptic gels. Water hyacinth leaves will not cause microbial resistance due to the complexity of water hyacinth leaves containing flavonoids (luteolin, apigenin, tricin, chrysoeriol, kaempferol, azaeleatin, gossypetin, and orientin) and tannins contained in water hyacinth leaves are proven to be effective as antibacterial and antimicrobial agents. Based on this potential, water hyacinth leaves are very likely to be used as a natural antiseptic. The hand sanitizer produced in this activity has gone through a preference test on the community by looking at the preferences for color, thickness, moist impression, aroma (fragrance), and packaging. The teenager community in the RW 027, Batursari, Mranggen District, Demak Regency. With this activity, the teenager community can gain knowledge about the use of water hyacinth leaf extract as a natural hand sanitizer that is environmentally friendly and can make hand sanitizer products independently. Thus, the application of making water hyacinth leaf extract hand sanitizer can be applied in the area.
Pengaruh Variasi Kondisi Operasi pada Kolom Distilasi Ekstraktif terhadap Sifat Fisis Pelarut Hidrokarbon Terdearomatisasi Haniif Prasetiawan; Wara Dyah Pita Rengga; Dewi Selvia Fardhyanti; Bayu Triwibowo; Achmad Chafidz
REACTOR: Journal of Research on Chemistry and Engineering Vol 3, No 2 (2022): Published in December 2022
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v3i2.60

Abstract

Solvent is one of the important components in chemical processes. The type of solvent that is often used in the paint and coating industry is a hydrocarbon-based solvent which consists of a diverse complex mixture of liquids and contains aliphatic, alicyclic and aromatic (C5-C8) elements. Aromatic hydrocarbons are environmental pollutants that are known to be toxic, carcinogenic and mutagenic, so a hydrocarbon-based solvent with an aromatic content of less than 1% is needed. An appropriate separation method for separating aromatic and nonaromatic components having close boiling points is extractive distillation with a sulfolane entrainer. In this study, a distillation system with a sulfolane entrainer was run using the process simulation software Aspen Plus with the aim of understanding the effect of the amount of sulfolane, feed stage and number of stages on the physical properties of hydrocarbon-based solvents. This simulation is focused on the variation of the ratio of sulfolane: crude feed (7:1, 7.5:1, 8:1, 8.5:1), the variation of the feed stage (10th stage to the 35th stage) and the variation of the number of stages (70, 75, 80). It was found that the number of stages did not affect the density and flash point of the solvent. An increase of number of stage will decrease the solvent flash point and density. Significant decreament also can be found when the sulfolane to crude feed ratio is increased. However, the physical properties of the current dearomatized solvent is close to the properties of commercial product namely SBP 65/70 from one of oil and gas companies.
Kinetic Study of Non-Isothermal Reactions on the Pyrolysis of Various Biomass Waste by using Thermogravimetric Data Prasetiawan, Haniif; Fardhyanti, Dewi Selvia; Fatriasari, Widya; Hadiyanto, Hadiyanto
Jurnal Bahan Alam Terbarukan Vol 12, No 2 (2023): December 2023 [Nationally Accredited Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v12i2.49431

Abstract

Population growth causes an increase in the need for petroleum. However, petroleum as primary energy is currently increasingly limited in availability. Required alternative energy sources that can be renewed to overcome these problems, one of which is bio-oil. Bio-oil is produced by a pyrolysis process using biomass such as sugarcane bagasse, rice husk, and empty oil palm fruit bunches (EFB), by heating in the absence of oxygen. Kinetic studies on pyrolysis of this type of biomass (sugar cane bagasse, rice husk, and empty oil palm fruit bunches) were carried out using the thermogravimetric method. The Coats-Redfern method was used in this study. The purpose of this study is to obtain the most appropriate reaction kinetics model to represent the pyrolysis process for each type of biomass. In addition, to determine the optimal temperature used in forming bio-oil. Approximately 5 g of each biomass is used with a heating rate of 10°C/minute. Pyrolysis was carried out until the temperature reached 750°C. The results of the research on the selected kinetic model for each biomass is a geometric model with a correlation coefficient (R2) close to 1 and the optimum temperature for producing bio-oil is around 550 - 600°C.
IbM Pemanfaatan Bio Char Hasil Pirolisis Limbah Biomassa Sebagai Media Tanam Pada Bagi Kelomok Remaja RW 7 Kelurahan Sendangmulyo Sebagai Upaya Penguatan Karakter Jiwa Konservasi Bagi Generasi Muda Prasetiawan, Haniif; Fardhyanti, Dewi Selvia; Triwibowo, Bayu
PENGABDI PENGABDI: VOL. 5, NO.2 (2024)
Publisher : Universitas Negeri Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/pengabdi.v5i2.64646

Abstract

Pengabdian masyarakat ini bertujuan untuk memanfaatkan biochar sebagai media tanam untuk kelompok remaja RW 7 di Kelurahan Sendangmulyo sebagai upaya penguatan karakter jiwa konservasi bagi generasi muda. Biochar merupakan hasil pirolisis dari limbah biomassa, dan dapat meningkatkan kualitas tanah serta memperbaiki kondisi lingkungan. Dalam program ini, kelompok remaja akan dilibatkan dalam kegiatan bercocok tanam dengan menggunakan biochar sebagai media tanam. Selain itu, mereka juga akan diberikan edukasi mengenai pentingnya konservasi dan peran generasi muda dalam melestarikan lingkungan. Diharapkan melalui program ini, kelompok remaja dapat mengembangkan karakter jiwa konservasi serta memiliki kepedulian terhadap lingkungan sekitar. Kegiatan pengabdian ini juga diharapkan dapat memberikan manfaat dan inspirasi bagi petani dan masyarakat sekitar untuk mengadopsi praktik pertanian yang ramah lingkungan dan berkelanjutan serta meningkatkan kesejahteraan mereka secara ekonomi.
Co-Authors Achmad Chafidz Amalia Larasati Astrilia Damayanti Astrilia Damayanti Bayu Triwibowo Cahyani, Novia Noor Chafidz, Achmad Dewi Artanti Putri Dhoni Hartanto Edy Cahyono Hadiyanto Hadiyanto Haniif Prasetiawan Izzat Syahmi Kamal Shahrizan Julianur, Syara Sofia Junaidah Jai Khoiroh, Ianatul Kuntoro Kuntoro Larasati, Amalia Maharani Kusumaningrum Megawati - Megawati Megawati Megawati Megawati Nadya Alfa Cahaya Imani Nurul Asyikin Md Zaki Ratna Dewi Kusumaningtyas Ria Dwita Riski, Ria Dwita Riski, Ria Dwita Sinta Andriyani Sri Mursiti Sudarmin Sudarmin Suwito, Slamet Syara Sofia Julianur, Syara Sofia Wara Dyah Pita Rengga Widya FATRIASARI Zuhriyan Ash Siddieqy Bahlawa