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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Physical Review Jurnal Pengabdian Masyarakat Sains Indonesia (Indonesian Journal Of Science Community Services) Acta Chimica Asiana
Alaa, Siti
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Library & Information Science Materials Science & Nanotechnology Physics Public Health Social Sciences

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Synthesis of nanochitosan from oyster pearl shell (Pinctada maxima) as renewable energy candidate Rahayu, Susi; Alawiyah, Geby; Kurniawidi, Dian W.; Ardianto, Teguh; Budianto, Arif; Alaa, Siti; Syamsuddin, Syamsuddin
Acta Chimica Asiana Vol. 7 No. 2 (2024)
Publisher : The Indonesian Chemical Society, Chapter Nusa Tenggara and The University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/aca.v7i2.205

Abstract

The increase in energy needs must be balanced by environmentally friendly technological innovations. Chitosan polymer is one of the technological innovations of energy materials that are being developed by many developed countries. This research aimed to identify the potential of oyster pearl shell waste as a source of electrolyte polymers. The study was conducted experimentally by synthesizing chitosan nanoparticles from chitosan using the ionic gelation method. Chitosan is obtained through the isolation method from Pinctada maxima oyster pearl shell waste. The isolation method is carried out by three processes: deproteination, demineralization, and deacetylation. Several characterizations were carried out to analyze the material from the synthesis, including a proximate test, FTIR analysis, and PSA analysis. Isolated chitosan was identified to have a deacetylation degree that reached 88.63% with the formation of OH and NH2 functional groups. In general, the proximate tets data has shown that the obtained chitosan already meets the Indonesian standard SNI 7949:2013. PSA analysis resulted in differences in size distribution, PDI, and zeta potential between chitosan and chitosan nanoparticles. The results were obtained by the average distribution of chitosan particle size of 52.043 μm and chitosan nanoparticle size of 2.3365 μm—the analysis of the potential zeta of chitosan -3.9 mV and chitosan nanoparticle -21,6 mV. Thus, changes in the size of the chitosan material affect its potential PDI and zeta values. The change of these two values is a good indicator of the initial data and the potential of the material as an energy material. Therefore, chitosan polymer is an electrolyte material that can be used as a candidate for environmentally friendly renewable energy materials
Simulasi Sekolah Aman Bencana di SMKN 1 Kuripan Sebagai Upaya Pengurangan Resiko Bencana di Sekolah Syamsuddin, Syamsuddin; Alaa, Siti; Ahyana, Ridho; Kurniawidi, Dian Wijaya; Ayub, Syahrial; Zuhdi, Muhammad
Jurnal Pengabdian Masyarakat Sains Indonesia (Indonesian Journal Of Science Community Services) Vol. 4 No. (1) (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpmsi.v4i(1).175

Abstract

Untuk mengurangi resiko bencana di Indonesia perlu dilakukan strategi yang efektif dan terpadu. Salah satu metode yang paling efektif adalah dengan membentuk sekolah aman bencana. Telah dilakukan simulasi bencana di SMKN 1 Kuripan sebagai bentuk edukasi agar dapat meminimalisir korban ketika bencana terjadi. Pengabdian dilaksanakan dengan metode ceramah, diskusi dan simulasi yang dibantu oleh Tim BPBD Provinsi NTB, Pramuka, dan PMI. Kegiatan pengabdian berjalan sukses dan diakhir kegiatan terbentuk Tim Siaga Sekolah. Kata kunci: Sekolah aman bencana, BPBD, simulasi
EKSTRAK GETAH PEPAYA (Carica Papaya) DENGAN PENAMBAHAN Cu SEBAGAI DYE SENSITIZER SOLAR CELL (DSSC) Kurniawidi, Dian Wijaya; Alaa, Siti; Rahayu, Susi
Indonesian Physical Review Vol. 1 No. 1 (2018)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (485.082 KB) | DOI: 10.29303/ipr.v1i1.5

Abstract

Indonesia is a biodiversity country. Abundance of biological resources may encourage researchers to optimize its use. As an example papaya trees are utilized as raw material for thin films. Sap of papaya latex is doppinged with Cu. This composition is depositioned on top of FTO by spin coating method. The addition of Cu dopping aims to control the rate of crystallinity of the material. This research will add Cu between 10% and 50% solution. Based on FTIR test results, flavonoid compounds might be obtained with O-H group, some aromatic rings C = C and C = O, aliphatic compounds C-H and -CO. Flavonoid compounds are potentially utilized as dye for DSSC. The thickness of dye produced by doping Cu 10% is approximately (0.5-2) μm. Furthermore, dopping Cu from 20% to 40% can produce thickness around 10-50 nm. Meanwhile, the results of the XRD test show an effective Cu between 10% to 40%.
THE ANALYSIS OF ATTENUATION COEFFICIENT AND ACOUSTIC IMPEDANCE OF CEILING PANEL USING IMPEDANCE CHAMBER METHOD Putramulyo, Satriogi; Wirawan, Rahadi; Alaa, Siti; Qomariyah, Nurul
Indonesian Physical Review Vol. 1 No. 1 (2018)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (666.803 KB) | DOI: 10.29303/ipr.v1i1.7

Abstract

The purposed of this research is to determine the attenuation coefficient and acoustic impedance of ceiling panel like plywood, calsiboard and bamboo woven.  The influence thickness, paint coated, air cavity increment of the attenuation coefficient and acoustic impedance of these ceiling panel are also mesured. The impedance chamber method with range of frequency 100 Hz – 5000 Hz are used here. The result shows that the average of attenuation coefficient for plywood panel, calsiboard panel and bamboo woven panel are 0,37 Npmm-1, 0,62 Npmm-1 and 0,28 Npmm-1 respectively. In addition, the acoustic impedance of these panel is 1,33 x 106 kgm-2s-1, 3,74 x 106 kgm-2s-1 and 1,15 x 106 kgm-2s-1. The attenuation coefficient is decreased with the increasing thickness of the panel and the same trend is founded of the acoustic impedance. Meanwhile, the paint coated can increase attenuation coefficient and acoustic impedance. For the air cavity increment ceiling panel, the attenuation coefficient and acoustic impedance are less than the solid panel.
IDENTIFIKASI SIFAT FISIS KANDIDAT WAFER DARI LIMBAH TAHU SEBAGAI ALTERNATIF PAKAN TERNAK Rahayu, Susi; Nurhidayati, Nurhidayati; Kurniawidi, Dian Wijaya; Alaa, Siti
Indonesian Physical Review Vol. 4 No. 1 (2021)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v4i1.72

Abstract

Inovasi pembuatan pakan ternak dalam sediaan wafer perlu dilakukan untuk menjadi alternatif pakan saat musim kemarau. Limbah tahu merupakan salah satu bahan dasar yang dimanfaatkan sebagai bahan pembuatan wafer. Tujuan penelitian ini untuk mengidentifikasi perlakuan yang direkomendasikan dalam pembuatan kandidat wafer berdasarkan karakteristik fisis wafer. Kandidat wafer ditinjau berdasarkan warna, kadar air, densitas wafer, densitas partikel, dan porositas.  Proses pembuatan wafer dilakukan dengan proses pemadatan dan pemanasan. Sebelum serbuk limbah tahu dicetak, dipastikan dahulu kadar air pada serbuk limbah tahu sesuai dengan stadar SNI 3148:2:200. Suhu pemanasan serbuk limbah tahu yang direkomendasikan menggunakan suhu 100oC. Karakteristik serbuk limbah tahu yang dihasilkan yaitu serbuk berwarna putih, kadar air sebesar 14,1% dengan nilai densitas partikel serbuk limbah tahu(𝜌sa ) 0,189g/cm3 serta porositas (𝜙sa ) 0,216%. Sedangkan untuk proses pencetakan wafer, suhu pemanasan yang direkomendasikan yaitu 70oC. Kandidat wafer yang diperoleh menghasilkan warna putih, tahan hingga 4 minggu, kadar air 7,19%, densitas partikel (𝜌p ) 0,254 g/cm3, densitas wafer 1,10 g/cm3 dan porositas 𝜙w sebesar 3,47±0,0118%. 
Characteristics of Dyeing Cotton Thread Using Fine Particle Powder from Tectona Grandis Leaf Kurniawidi, Dian W.; Dewi, Diah L.; Rahayu, Susi; Budianto, Arif; Alaa, Siti
Jurnal Penelitian Pendidikan IPA Vol 9 No 10 (2023): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i10.3753

Abstract

In Lombok, the traditional process of dyeing woven fabrics primarily involves the use of synthetic dyes, which can contribute to environmental pollution. This study aimed to identify the characteristics of woven yarn and assess the effect of dye solution pH on yarn properties when using teak leaves (Tectona grandis) to produce dye powder through a mechanical thermal method. The thread coloring process comprised mordanting, coloring, and fixation stages, with the assistance of Android applications for color analysis and a Universal Tensile Machine Type RTG-1310 to assess mechanical properties. The results revealed that dyeing yarn with anthocyanin powder from teak leaves yielded a range of colors, including shades of gray, brown, and red. The highest tensile strength observed was 2,664 cN/dtex, and the solution's pH significantly influenced the dominant color, with red being prominent. Notably, optimal tensile strength (1,649 cN/dtex) was achieved at pH six. These findings highlight the potential for producing high-quality cotton threads using different dyeing processes and techniques. The study's insights contribute to both environmental protection and thread quality enhancement in the textile industry
Co-Authors Ahyana, Ridho Alawiyah, Geby Arif Budianto Dewi, Diah L. Kurniawidi, Dian W. Kurniawidi, Dian Wijaya Muhammad Zuhdi Nurhidayati Nurhidayati Nurul Qomariyah Putramulyo, Satriogi Susi Rahayu Syahrial Ayub, Syahrial Syamsuddin Syamsuddin Teguh Ardianto, Teguh Wirawan, Rahadi