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Indah Puspita, Indah
Jurusan Teknik Sipil, Fakultas Teknik Sipil dan Perencanaan, Institut Teknologi Sepuluh Nopember Surabaya
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Sifat Mekanik dan Densitas Ikatan Silang Hidrogel berbasis Tapioka Nanopartikel Puspita, Indah; Kurniati, Mersi
Jurnal Riset Fisika Indonesia Vol 3 No 1 (2022): Desember 2022
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v3i1.3665

Abstract

Tapioca is a natural polymer that is widely used as a raw material for hydrogels. In order to improve the mechanical properties of tapioca-based hydrogels, this research modified tapioca by acid hydrolysis method for 2 hours and 24 hours and by ethanol precipitation method. This modified tapioca was further treated with epichlorohydrin with various concentrations of 0, 5, 10, and 20% to produce a three-dimensional cross-linked structure. The results showed that the increasing of epichlorohydrin concentration led to an increasing in the mechanical properties of the hydrogels consisting of hardness, stress, modulus of elasticity, and cross-linked density. The hydrogel from tapioca hydrolyzed for 24 hours and 20% epichlorohydrin was the sample with the best mechanical properties with a hardness of 19.78 mJ, a stress of 78.65 kPa, a modulus of elasticity of 233.84 mJ, and a cross-linked density of 57.61 × 1024 m-3.
Pengaruh Iradiasi Gamma dan Asam Akrilat terhadap Sifat Mekanik Polimer Super Water Absorbent (SWA) Berbasis Onggok Puspita, Indah; Kurniati, Mersi; Winarti, Christina
Jurnal Riset Fisika Indonesia Vol 3 No 2 (2023): Juni 2023
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v3i2.4163

Abstract

The Super Water Absorbent (SWA) polymer is a type of polymer that has exceptional water absorption capabilities while remaining insoluble in water. In this study, the authors conducted research on the modification of SWA by including acrylic acid and acrylamide monomers, followed by a crosslinking process utilising gamma irradiation. This study investigated the impact of acrylic acid and gamma irradiation on the mechanical characteristics of SWA. The experimental findings demonstrated a notable enhancement in the mechanical properties of the hydrogel by the incorporation of acrylic acid. This was evidenced by a substantial rise in the hardness value, which rose from 11.09 mJ to 36.13 mJ.
Sintesis dan karakteristik nanopartikel CaO dari cangkang kerang darah (Anadara granosa) menggunakan metode kopresipitasi Hayati, Nur; Kurniawan, Widodo Budi; Puspita, Indah
Jurnal Riset Fisika Indonesia Vol 4 No 2 (2024): Juni 2024
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v4i2.4378

Abstract

The lithium ion battery is a type of secondary battery. A good component to be used as the anode of a lithium ion battery is Li4Ti5O12 (LTO). LTO has a low conductivity value so doping is necessary. Doping particle size greatly affects the conductivity of LTO. The purpose of this doping was carried out to find out how the effect of CaO nanoparticle doping on the conductivity value of the LTO battery anode using the coprecipitation method by varying the molarity of NaOH, namely 1M, 3M and 7M. Based on the results of research on the influence of NaOH molarity, it produces different sizes of nanoparticles. The smallest nanoparticle size was obtained in the 3M sample variation, which was 175.0 nm. With a purity of CaO nanoparticles of 96.35%. While the conductivity value of the lithium ion battery doped with CaO nanoparticles with three variations of NaOH molarity, the optimum value was obtained in the 1M sample, which was 1.06 × 10-6 S/cm. This is because the 1M variation produces very low impurities compared to the 3M and 7M variations which have more impurities, this can affect the conductivity value.
PRAKTIK ECOPRINT DALAM PENGUATAN PEMBERDAYAANPEREMPUAN DENGAN PEMANFAATAN POTENSI LOKAL LINGKUNGAN SEKITAR TEMPAT TINGGAL PADA KELURAHANJERAMBAH GANTUNG Valeriani, Devi; Wibawa, Dian Prihardini; Wulandari, Ayu; Puspita, Indah
Dharma Pengabdian Perguruan Tinggi (DEPATI) Vol 5 No 2 (2025): November 2025
Publisher : Fakultas Sains dan Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mf8xwz79

Abstract

Ecoprint merupakan teknik pewarnaan kain ramah lingkungan yang menggunakan bahan alami seperti daun dan bunga, sehingga berkontribusi pada pelestarian lingkungan serta menciptakan peluang ekonomi bagi masyarakat. Metode yang digunakan dalam program ini meliputi pelatihan dan pendampingan langsung kepada kelompok perempuan desa mengenai teknik dasar ecoprint, pemilihan bahan baku lokal, serta strategi pemasaran produk. Melalui pendekatan partisipatif, program ini tidak hanya meningkatkan keterampilan teknis peserta tetapi juga membangun kesadaran akan pentingnya ekonomi berbasis lingkungan dan keberlanjutan. Hasil dari kegiatan ini menunjukkan adanya peningkatan keterampilan perempuan dalam mengolah bahan alami menjadi produk ecoprint yang memiliki nilai jual. Selain itu, program ini mendorong kemandirian ekonomi perempuan serta memperkuat peran mereka dalam mendukung pembangunan desa berbasis potensi lokal. Dengan demikian, penguatan pemberdayaan perempuan melalui praktik ecoprint dapat menjadi solusi inovatif dalam meningkatkan kesejahteraan masyarakat desa secara berkelanjutan.
PROGRAM GERAKAN PEKARANGAN PRODUKTIF BERBASIS URBAN FARMING Arsyadi, A; Aldila, Herman; Julianti, Erna; Puspita, Indah
Dharma Pengabdian Perguruan Tinggi (DEPATI) Vol 5 No 2 (2025): November 2025
Publisher : Fakultas Sains dan Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/0eb8dx40

Abstract

The household-scale microgreen urban farming program was implemented in Lubuk Kelik Village, Bangka Regency, as a community empowerment initiative to improve family income and prevent stunting. This program was designed to utilize limited household land through the cultivation of microgreens, which are easy to grow, have a short harvesting period, and provide high nutritional value. The implementation methods included socialization, technical training, cultivation practices, mentoring, and evaluation of outcomes. The results showed an increase in participants’ knowledge and skills in managing microgreens independently. Some participants consumed the harvest to improve family nutrition, while others began marketing the products within their neighborhood, contributing to additional household income. This program has proven to support the availability of affordable nutritious vegetables while also strengthening community awareness of stunting prevention. Therefore, microgreen urban farming has the potential to become an applicable and sustainable model for community empowerment.
Perbandingan dua aplikasi penapis fibrilasi atrium berbasis ponsel cerdas pada populasi Indonesia Tondas, Alexander Edo; Halim, Rolando Agustian; Felani, Muhammad Rizki; Caesarani, Fianirazha Primesa; Puspita, Indah; Toruan, Mangiring Lumban
Jurnal Kardiologi Indonesia Vol 42 No 1 (2021): Indonesian Journal of Cardiology: January - March 2021
Publisher : The Indonesian Heart Association

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30701/ijc.1066

Abstract

Background: Due to its adverse outcomes and thromboembolic complications, early detection of atrial fibrillation (AF) is advisable in the general population. This study aims to compare the diagnostic ability of two distinct method in smartphone application format, namely : AliveCor KardiaMobile and FibriCheck. Methods: This study was conducted in Mohammad Hospital General Hospital Palembang with convenience sampling of 170 participants aged 18 years or older. The subjects underwent Fibricheck and KardiaMobile recordings followed by 12 lead electrocardiogram read by board-certified cardiologist as the diagnostic standard. Results: After the exclusion of previous pacemaker implantation (n=7), 163 patients were included in the study. The mean age was 51±15 years with gender distribution of 74.8% men and 25.2% women. Most of the subjects were asymptomatic (87.1%) with mean blood pressure of 130/80 mmHg. The Fibricheck readings showed sensitivity of 73% and specificity of 93%, meanwhile Kardiamobile was able to detect AF with sensitivity of 77% and specificity of 98%. Conclusion: In our study, KardiaMobile demonstrated overall greater sensitivity and specificity when compared to FibriCheck. However, KardiaMobile requires an external metal sensor that must be puchased separately. To the best of our knowledge, this is the first study to directly compare both methods in the Indonesian population.
Synthesis and Characterization of Hydrogel Cassava Pulp–Poly (Acrylate – Acrylamide) at Various Concentrations of Acrylic Acid and Crosslinker Winarti , Christina; Kurniati, Mersi; Puspita, Indah; Suwarda, Rosniyati; Widaningrum; Maddu, Akhiruddin
Science and Technology Indonesia Vol. 11 No. 1 (2026): 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.2026.11.1.356-365

Abstract

Cassava pulp or bagasse is a by-product of cassava processing with high starch and cellulose, showing strong potential for development into various high-value products, including hydrogel. Hydrogel is a polymer capable of absorbing a large amount of water without dissolving and is suitable for several applications. Therefore, this study aimed to synthesize and characterize hydrogel made from cassava waste pulp with different concentrations of acrylamide and acrylic acid (AA). The treatments used were the percentage of acrylic acid, namely 0, 5, 15, 25, and 35%, alongside N, N-methylene bisacrylamide (MBA) percentages (0, 0.5, 1, and 1.5%). Parameters observed were swelling, swelling kinetics, gel fraction, mechanical properties, and surface morphology. The results showed that the addition of acrylic acid and crosslinking with MBA had a significant effect on swelling, gel fraction, and mechanical properties at a significant level of 5%. FTIR confirmed the chemical interaction comprising acrylic-acrylamide acid andMBA in cassava pulp. In line with the analysis, the best treatment was obtained from 25% acrylic acid percentage and 0.5% MBA concentration with 1058% swelling value and 70.05% gel fraction. This hydrogel had a hardness of 6.46 mJ, 5.39 kPa modulus of elasticity, and 4.34 x 1023 m-3 active bonds per unit volume, showing the potential for use in agricultural fields as a planting medium, water carrier, and fertilizer protector.
Pengaruh Konsentrasi Kitosan Terhadap Karakteristik Bioplastik Selulosa Batang Pisang dengan Plasticizer Gliserol oktavia, oktavia; Puspita, Indah; Kusmita, Tri; Utami, Rizka
Jurnal Riset Fisika Indonesia Vol 6 No 01: Desember 2025
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v6i01.5196

Abstract

The development of bioplastics has continued to grow as an alternative material based on renewable natural resources. Cellulose is a natural polymer that is widely used as a raw material for bioplastics; however, cellulose-based bioplastics generally show limited mechanical stability and rigidity. Therefore, the addition of chitosan and glycerol is required to improve their characteristics. This study aims to determine the cellulose content and functional groups of banana stem cellulose and to analyze the effect of chitosan concentration on the thickness, mechanical properties, and degradation rate of banana stem cellulose-based bioplastics using glycerol as a plasticizer. Bioplastics were synthesized by varying the chitosan concentration at 1%, 2%, 3%, and 4%. The results showed that the cellulose content of banana stems reached 93%, with the presence of –OH, –CH, and –CO functional groups. The variation in chitosan concentration affected the thickness, tensile strength, elongation at break, and degradation rate of the bioplastics. An increase in chitosan concentration resulted in a decrease in thickness and elongation, while tensile strength and degradation rate increased with higher chitosan content. These results indicate that chitosan concentration significantly influences the physical, mechanical, and degradation properties of banana stem cellulose-based bioplastics, demonstrating their potential as biodegradable materials.
Sintesis dan Karakterisasi Hidrogel Limbah Onggok dan Polyvinyl Alcohol (PVA) mengandung Ekstrak Lada sebagai Pemballut Luka Antibakteri Rokar, Risna Kirana; Puspita, Indah; Indriawati, Anisa
Jurnal Riset Fisika Indonesia Vol 6 No 01: Desember 2025
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v6i01.5197

Abstract

Wound healing is a complex biological process in which wound dressings play a vital role in providing protection and supporting tissue regeneration. In this study, cassava dregs waste was utilized as a base material for the development of hydrogel wound dressings. The hydrogel was incorporated with black pepper (Piper nigrum) extract to enhance its antibacterial properties. Sample preparation consisted of several stages, including cassava dregs processing, hydrogel synthesis, and extraction of black pepper using the maceration method. The hydrogel was characterized in terms of swelling capacity, gel fraction, swelling kinetics, antibacterial activity against Staphylococcus aureus, functional group identification using Fourier Transform Infrared (FTIR) spectroscopy, and morphological analysis. The results demonstrated that the incorporation of black pepper extract significantly affected the swelling behavior of the hydrogel, with swelling capacities ranging from 263.76% to 387.87%. The hydrogel exhibited a high gel fraction of 86.13% and favorable swelling kinetics with a kinetic constant of 0.5443. Variations in black pepper extract volume were evaluated, including 0 ml (control), 20 ml, 40 ml, and 60 ml. These findings indicate that cassava dregs–based hydrogels enriched with black pepper extract have promising potential as antibacterial wound dressing materials.
Predictive Value of Bazett-Corrected QTc for Chemotherapy-Induced Cardiotoxicity in Breast Cancer: A Retrospective Cohort Study Lerista, Maria; Soniya, Firinda; Salsabila, Zeta Reihan; Putra, Justian Ananda; Agustine, Vania; Banun, Syahri; Felani, Muhammad Rizky; Puspita, Indah; Tondas, Alexander Edo
Jurnal Kardiologi Indonesia Online First
Publisher : The Indonesian Heart Association

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30701/ijc.1896

Abstract

Background : Cardiotoxicity remains a major concern in breast cancer patients receiving anthracycline-based chemotherapy. Meanwhile, prolongation of the QTc interval has been associated with an increased risk of torsades de pointes; however, the clinical evidence for its role as a predictor of subclinical cardiotoxicity remains limited. This study aims to evaluate the association between Bazett-corrected QTc and the incidence of subclinical left ventricular dysfunction, as measured by strain echocardiography. Methods : This single-center retrospective cohort study was conducted at Dr. Mohammad Hoesin General Hospital, Indonesia (January 2022–December 2023). Female breast cancer patients aged ≥18 years who received anthracycline or non-anthracycline chemotherapy and completed baseline and third-cycle echocardiography were included. QTc was measured from 12-lead ECGs before and after chemotherapy using Bazett’s formula. Subclinical cardiotoxicity was defined as a >15% relative reduction in global longitudinal strain (GLS) from baseline. Logistic regression and ROC analyses assessed the predictive value of baseline QTcB. Result : In 32 breast cancer patients on anthracycline therapy (mean age 49.5 ± 9.0 years) were analyzed; 59.4% developed subclinical cardiotoxicity. Prolonged baseline QTcB, older age, and obesity were significantly associated with subclinical cardiotoxicity (p < 0.05). In multivariate analysis, QTcB remained an independent predictor (OR = 21.09; 95% CI: 0.979–454.4; p = 0.05). ROC analysis showed moderate discrimination (AUC = 0.717; 95% CI: 0.50–0.92; p = 0.04). Conclusion : Prolonged QTc appears to be a promising predictor of subclinical cardiotoxicity with fair diagnostic accuracy. However, it should be considered alongside other modalities. Further studies with larger populations are needed to control for other risk factors.
Co-Authors Agustine, Vania Akhiruddin Maddu Alexander Edo Tondas Andina Syafrina Arsyadi, A Ayu Wulandari Banun, Syahri Caesarani, Fianirazha Primesa Christina Winarti Danang Prayoga, Danang Daniel Jeremias Lopes, Daniel Jeremias David Bahrin Devi Valeriani Dewi Putri Dian Prihardini Wibawa Dwi Larso Felani, Muhammad Rizki Felani, Muhammad Rizky Halim, Rolando Agustian Hamzah Haru, Hamzah Herman Aldila Indriawati, Anisa Julianti, Erna Khaerani, Hera Lerista, Maria Lestari, Diani Mersi Kurniati Muhammad Faizal Nur Hayati Oktavia Oktavia Putra, Justian Ananda Rokar, Risna Kirana Rosniyati Suwarda Salsabila, Zeta Reihan Saputri, Riny Soniya, Firinda Sulastri, Fitri Toruan, Mangiring Lumban Tri Kusmita Utami, Rizka Wawan Trianto, Wawan Widaningrum Widodo Budi Kurniawan Winarti , Christina Winarti, Dewi Wulansuci, Ghina