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All Journal International Journal of Advances in Applied Sciences Indonesian Journal of Geography VALENSI Jurnal Ilmu Lingkungan Jurnal Ilmu Lingkungan Jurnal Pendidikan Ekonomi (JUPE) The Journal of Pure and Applied Chemistry Research Jurnal Kimia Riset Indonesian Journal of Chemistry Jurnal Kartika Kimia Fullerene Journal of Chemistry Bantenese Jurnal Pengabdian Masyarakat Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Jurnal Pengabdian Masyarakat Biologi dan Sains Jurnal MIPA dan Pembelajarannya Innovation for Community Service Journal Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS) Frontier Advances in Applied Science and Engineering
Eli Hendrik Sanjaya
Universitas Negeri Malang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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The Development of Disaster Risk Map for Semeru Volcano Eruption 2021-2022, East Java, Indonesia Bachri, Syamsul; Sanjaya, Eli Hendrik; Sendari, Siti; Shrestha, Rajendra Prasad; Irawan, Listyo Yudha; Billah, Egi Nursari; Putri, Nanda Regita; Prastiwi, Mellinia Regina; Hakiki, A.Riyan Rahman; Hidiyah, Tabita May
Indonesian Journal of Geography Vol 56, No 3 (2024): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.89918

Abstract

The Semeru Volcano eruption on December 4, 2021 caused damage to social, economic and environmental aspects. The Rejali Watershed (DAS) is one of the areas severely affected due to the eruption. The eruption resulted in 51 deaths, 10,565 displaced people, 1,027 houses damaged, two connecting routes and 43 public facilities damaged. This study mapped the disaster risk areas due to the eruption of Semeru Volcano. This research used Laharz to analyze the lava flow hazard map and weighting for social, economic, physical, environmental, and capacity vulnerability parameters. The results showed that the risk level of Semeru Volcano eruption is divided into three classes: high,  medium, and low risk. The high-risk area is 8915.09 Ha (14 %), the medium-risk area is 2174.74 Ha (17 %), and the low-risk area is 1885.60 Ha (69%). The high and medium risks were located on the upper and middle slopes of the Rejali watershed because the upstream area experiences a narrowing of the river flow (bottleneck) due to direct borders with structural land. The Semeru Volcano disaster risk map results can be used as a reference in sustainable risk management efforts in the Rejali watershed to reduce the impact and damage caused by the eruption.
Analisis Kualitas Air Tanah Di Sekitar Tempat Pembuangan Akhir (TPA) Ilegal Di Desa Toyomarto Singosari Malang Sanjaya, Eli Hendrik; Suharti; Alvionita, Mieke
BANTENESE : JURNAL PENGABDIAN MASYARAKAT Vol. 6 No. 2 (2024): Bantenese: Jurnal Pengabdian Masyarakat
Publisher : Pusat Studi Sosial dan Pengabdian Masyarakat Fisipkum Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30656/taq24f78

Abstract

Desa Toyomarto adalah salah satu desa yang terletak di wilayah Kecamatan Singosari Kabupaten Malang. Mata air yang ada menjadi sumber air utama bagi kehidupan masyarakat Desa Toyomarto sekaligus menjadi tempat wisata air seperti tempat wisata Pentungan Sari Waterpark. Tidak hanya menjadi tempat wisata, bahkan beberapa sumber mata air juga digunakan masyarakat sekitar sebagai sumber irigasi utama untuk kebun teh di Wonosari, namun di desa tersebut juga terdapat TPA ilegal. Keberadaan TPA ilegal tersebut dikhawatirkan dapat mencemari dan mempengaruhi kualitas mata air yang ada di Desa Toyomarta, mengingat sangat fitalnya sumber mata air tersebut bagi kehidupan masyarakat sekitar. Jika air tanah tercemar maka bukan hanya kesehatan masyarakat Desa Toyomarto yang terancam, namun perputaran ekonomi di daerah tersebut dan sekitarnya juga terancam. Program pengabdian ini bertujuan untuk melakukan pengujian kualitas air tanah menggunakan alat bantu teknis dan secara laboratorium bersama Dinas Lingkungan Hidup Kabupaten Malang serat dilakukannya sosialisasi kepada masyarakat Desa Toyomarto tentang pentingnya kualitas air bagi kesehatan, kehidupan sehari-hari, dan kualitas air sebagai tempat wisata serta cara meningkatkan dan menjaga kualitas air tersebut sehingga tetap layak digunakan. Upaya untuk mencapai tujuan tersebut, program melibatkan langkah-langkah seperti penilaian awal, pengambilan sampel air, pengujian sampel air, sosialisasi dan edukasi kepada masyarakat Desa Toyomarto, pemantauan, dan evaluasi berkelanjutan. Upaya ini dilakukan untuk menjaga kebersihan dan kesehatan lingkungan terutama pada ekosistem air serta memberikan manfaat positif bagi seluruh masyarakat Desa Toyomarto.
Dampak Pembangunan Sanitasi dan Instalasi Pengolahan Limbah Cair Domestik Sederhana Pondok Pesantren Kalimasada Jombang Sanjaya, Eli Hendrik; Edy, Duwi Leksono; Nasih, Ahmad Munjin; Alfianto, Imam; Santoso, Aman; Yahmin, Yahmin
Innovation for Community Service Journal Vol 2 No 2 (2024): Oktober 2024
Publisher : Department of Chemistry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/icsj.v2i2.14833

Abstract

Program pengabdian ini bertujuan untuk meningkatkan sanitasi dan mengelola limbah cair domestik di Pondok Pesantren Kalimasada, Jombang. Upaya untuk mencapai tujuan tersebut, program melibatkan langkah-langkah seperti penilaian awal, perencanaan desain instalasi pengolahan limbah cair, pembangunan instalasi, pelatihan untuk penghuni, serta operasi, pemeliharaan, pemantauan, dan evaluasi berkelanjutan. Upaya ini dilakukan untuk menjaga kebersihan dan kesehatan lingkungan serta memberikan manfaat positif bagi pondok pesantren dan masyarakat sekitar. Berdasarkan hasil angket pra dan pasca program yang dikuatkan dengan observasi saat atau selama program, diperoleh hasil peningkatan yang signifikan antara pra-saat-dan pasca program. Dimulai dari ketersediaan fasilitas yang sebelumnya Pondok Pesantren Kalimasada Jombang belum memiliki failitas khusus untuk sistem sanitasi dan instalasi menjadi memiliki, dampak dari tersedianya fasilitas ini berbanding lurus dengan kebersihan yang akan tercipta. Selanjutnya pada perubahan mitra, aspek pengetahuan mengalami peningkatan dari 15% menjadi 45% hingga 95%. Kemudian pada aspek keterampilan mulai dari 25% menjadi 55% dan 85%. Hasil ini dikuatkan berdasarkan hasil wawancara yang menyampaikan terbantu dengan adanya pembangunan sistem sanitasi dan instalasi yang dibangun oleh tim, selain itu program ini juga memperoleh testimoni positif mitra.
Analysis of ice creams from goat milk kefir and red dragon fruit Santoso, Aman; Radiati, Lilik Eka; Damayanthi, Evy; Armaini, Armaini; Mujahidah, Amiroh Nabilah; Sanjaya, Eli Hendrik; Muntholib, Muntholib; Asrori, Muhammad Roy
International Journal of Advances in Applied Sciences Vol 14, No 2: June 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i2.pp481-489

Abstract

Ice cream from goat milk kefir is lower lactose than cow milk kefir. Combining goat milk kefir with red dragon fruit in ice cream formulations can improve the quality of the product. This study aims to determine the sensory characteristics, total solid, total flavonoid, and antioxidant activity of goat kefir-based ice cream flavored red dragon fruit as quality evaluation. The study used a completely randomized design with 4 treatments and 3 replications. The treatment was the ratio of goat kefir and dragon fruit, including 40:60, 50:50, 60:40, and 70:30 in the ice cream mixture. 30 panelists participated in the organoleptic test. Total solid testing referred to SNI 01-3713-1995. Determination of total flavonoid content was carried out by forming AlCl3 complexes spectrophotometrically and assaying antioxidant activity used 2.2-diphenyl-1-picrylhydrazyl (DPPH) method. The results showed that there was no significant difference in the organoleptic test for taste, color, and texture. The results of the total solids test showed that the higher the addition of goat kefir to ice cream, the lower the total solids produced. While the addition of goat kefir increased the total flavonoids in ice cream. The antioxidant activity with the best formulation of 50:50 was categorized as moderate level, which is 136.59 ppm.
Review on Synthesis, Properties, and Performances of Polymer/ Metal Organic Framework (MOF) composites membranes for water filtration application Ashfiya, Putri Sayyida; Khoerunnisa, Fitri; Nurhayati, Mita; Kadarohman, Asep; Sanjaya, Eli Hendrik; Hendrawan, Hendrawan; Sonjaya, Yaya; Aziz, Hafiz Aji; Annifah, Riri Uswatun; Iasya, Yurin Karunia Apsha Albaina
Jurnal Kartika Kimia Vol 8 No 1 (2025): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v8i1.871

Abstract

Mixed matrix membranes (MMMs) have gained considerable attention as a cutting-edge filtration technology, leveraging the combined advantages of polymer and inorganic fillers. Metal-organic frameworks (MOFs), as a nanoporous materials, are regarded as highly effective fillers in MMM, significantly enhancing molecular separation efficiency. This article provides a comprehensive review of the synthesis, properties, and performance of polymer/MOFs-based MMMs. A comprehensive literature search was conducted using ScienceDirect and Google Scholar with keywords such as metal-organic framework, MMMs, polymers, filler, and membrane filtration. Polymer/MOFs-based MMMs are synthesized using techniques including in situ and layer-by-layer assembly methods. The MMMs exhibit porosity distribution ranges from57 to 78.3%, contact angle ranges from 45° to 75.27°. The MMMs have also demonstrated exceptional performance in water permeability and bovine serum albumin (BSA)/salts rejection reached up to 94.03 L/m2.h and 99.8%, respectively. These finding highlight the significant potential of polymer/MOFs-based MMMs for advanced water filtration application.
Isolation and Identification of Indigenous Polypropylene-Degrading Bacteria Isolated From Bestari Landfill of Probolinggo Yuliana, Shinta; Wijayanti, Chandra; Qodriyah, Nur Romadhona Lailatul; Sanjaya, Eli Hendrik; Wahab, Roswanira Abdul; Susanti, Evi
Jurnal Kimia Fullerene Vol 10 No 2 (2025): Fullerene Journal Of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v10i2.718

Abstract

The Bestari Landfill of Probolinggo City collects a variety of plastics waste, most of it already in a degraded state. It is estimated to be potential habitat for polypropylene-degrading bacteria. Previous NGS studies identified 2,400 species of bacteria, but did not reveal their physiological and functional characteristics. This study aims to identify PP-degrading bacteria using 16S rRNA analysis. Isolation is carried out by the Enrichment method on Mineral Salt Media (MSM) containing PP granules. The research stages included sampling, isolation, and screening of bacteria for the most effective degrading agents. Six isolates of polypropylene-degrading bacteria were discovered at the Bestari Landfill of Probolinggo City, including B1UM1, B1UM2, B1UM3, B2UM1, B2UM2, and B2UM3. After 15 days of incubation, potential isolates B1UM1, B1UM2, and B2UM1 showed the highest polymer reduction of 8.25%, 7.15%, and 6.25%. Gram staining results showed that isolate B1UM1 was coccus and a Gram-positive bacterium, while isolates B1UM2 and B2UM1 were basil and Gram-positive. Genotypic identification through 16S rRNA sequence analysis showed that isolate B1UM1 had 100.0% similarity with Staphylococcus haemolyticus, BIUM2 had a 100% similarity to Bacillus cereus, and B2UM1 had a 99% had a similarity to Bacillus sp.
Taguchi-Assisted of Ligninase Production by Phanerochaete chrysosporium ITB Isolate Biofilm Mutmainah, Siti; Wahab, Roswanira Abdul; Sanjaya, Eli Hendrik; Susanti, Evi
Indonesian Journal of Chemistry Vol 25, No 4 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.103401

Abstract

The Phanerochaete chrysosporium ITB isolate can form a biofilm when grown on a support material, in which the attached cells are in a sessile state, which allows the cells to thrive better compared to other conditions. This study uses the Taguchi model to explore the ligninase (LiP, MnP, and laccase) production by P. chrysosporium ITB isolates immobilized on polypropylene (PP). This research was carried out in a laboratory experimental manner, which consisted of stages that included the preparation of spore suspension and optimization of conditions for the production of ligninase using Taguchi. The results showed that lignin peroxidase (LiP) and laccase (420.1 and 78.69 U/mg) enzymes were optimally produced using an inoculum size of 5 × 103 spore/mL, with a growth duration of 6 d at pH 3 and required 0.4 g/mL of PP to yield a 0.36% biofilm weight. The optimal production of MnP (410.23 U/mg) warranted an inoculum size of 5 × 102 spore/mL with incubation of 4 d at pH 5, and immobilization on 0.20 g/mL PP, to give a final biofilm weight of 0.09%. These results indicate a potential LiP and laccase production by the biofilm of P. chrysosporium on the polypropylene as supporting materials.
Study of Inhibition DNA Polymerase by Phenolic Compounds in Traditional Food Spices on the Polymerase Chain Reaction Process Fadila Abna Swari; Suharti, Suharti; Evi Susanti; Eli Hendrik Sanjaya; Sumari, Sumari
Frontier Advances in Applied Science and Engineering Vol. 1 No. 1 (2023)
Publisher : Tinta Emas Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59535/faase.v1i1.108

Abstract

Polymerase Chain Reaction (PCR) is a repeated cycle process including denaturation, annealing and extension using the DNA polymerase enzyme. This identification method is based on specific DNA which increases the number of DNA strands millions of times. The aim of this study was to identify and classify phenolic group compounds in traditional food spices that have the potential to inhibit DNA polymerase and their mechanism of action in the PCR process. The observation made was the Literature Review study as an analytical test method regarding the study of DNA polymerase inhibition by phenolic group compounds in traditional food spices in the PCR process. The results of this study were analyzed from several appropriate literature studies showing that most of the spices in traditional foods contain secondary metabolites of phenolic group compounds. These compounds have been shown to inhibit DNA polymerase in the PCR process, one of the mechanisms is to bind to the active site of DNA polymerase which causes decreased activity and deactivates DNA polymerase. Moreover, it can degrade and denaturate DNA polymerase. This makes it difficult to identify haram substances in processed food products using PCR.
Evaluasi dan Strategi Biodiesel Sebagai Energi Terbarukan di Indonesia: Literature Review Iklima, Ilma Kanzu; Hidayat, Taupik; Sofinila, Mida Fitri Agasty; Abrilia, Putri Riza; Sanjaya, Eli Hendrik; Utomo, Yudhi
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 7 No. 2 (2025): JPPL, September 2025
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M), Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/7ktxek50

Abstract

Biodiesel memiliki potensi besar sebagai energi terbarukan untuk mengurangi ketergantungan Indonesia pada bahan bakar fosil sekaligus menekan emisi gas rumah kaca. Penelitian ini bertujuan mengevaluasi potensi biodiesel di Indonesia melalui kajian literatur terhadap kebijakan, kendala, serta strategi pengembangannya. Metode yang digunakan adalah literature review dengan menelaah 23 artikel terbitan 2015–2025 yang relevan dengan topik biodiesel. Hasil kajian menunjukkan bahwa meskipun kebijakan mandatori B-2,5 hingga B-35 berhasil meningkatkan produksi dan konsumsi biodiesel secara signifikan, implementasinya masih menghadapi empat kendala utama, yaitu ketergantungan pada kelapa sawit sebagai bahan baku, keterbatasan infrastruktur distribusi, hambatan pendanaan akibat biaya produksi tinggi, serta kompleksitas teknologi konversi. Strategi yang diusulkan meliputi diversifikasi bahan baku melalui minyak jelantah, limbah pertanian, dan mikroalga; pengembangan teknologi katalis heterogen dan metode intensifikasi proses (microwave, ultrasonik); optimalisasi subsidi dan instrumen fiskal; pembangunan infrastruktur distribusi di luar Jawa; serta kolaborasi internasional dalam transfer teknologi dan pasar ekspor. Kajian ini menegaskan bahwa dengan integrasi strategi tersebut, biodiesel berpotensi menjadi pilar utama transisi energi berkelanjutan di Indonesia. Kata kunci: Kajian Literatur, Kebijakan Biodiesel di Indonesia, Solusi Energi Keberlanjutan.
Assessing entrepreneurial self-efficacy among senior high school students: A preliminary study Sanjaya, Eli Hendrik; Rokhim, Deni Ainur; Ardyansyah, Ananta; Dewi, Ratna Kumala; Widarti, Hayuni Retno; Munzil, Munzil; Muntholib, Muntholib; Yahmin, Yahmin
Jurnal Pendidikan Ekonomi (JUPE) Vol. 13 No. 3 (2025)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jupe.v13n3.p212-224

Abstract

Entrepreneurship is increasingly recognized as an essential skill for students to face global economic and social challenges. However, research on entrepreneurial self-efficacy (ESE) among high school students in Indonesia remains limited, despite its crucial role in shaping entrepreneurial intentions and readiness. This study aims to explore students’ levels of ESE and analyze the influence of gender and entrepreneurial experience on their abilities and intentions. Using a mixed-methods approach, data were collected through surveys measuring knowledge, interest, experience, and ESE. The findings reveal that students have high levels of entrepreneurial knowledge and interest, with ESE ranging from moderate to high. Gender was found to influence knowledge, interest, and ESE, with female students tending to demonstrate stronger entrepreneurial intentions. Moreover, prior entrepreneurial experience was shown to enhance both ESE and students’ interest in entrepreneurship. Qualitative analysis highlighted that students perceive capital, marketing, and product development as key needs for entrepreneurship, while common challenges include competition and financial constraints. Overall, students expressed neutral to positive sentiments toward entrepreneurial engagement. These findings underscore the importance of practical, gender-sensitive, and experiential entrepreneurship education to strengthen ESE and better prepare students for the challenges of the business world.
Co-Authors Abrilia, Putri Riza Ahmad Munjin Nasih Alifah Novitasari Alvionita, Mieke Aman Santoso Amara, Aulia Anggraini, Dyas Anie Yulistyorini Annifah, Riri Uswatun Anugrah Ricky Wijaya Ardyansyah, Ananta Armaini, Armaini Asep Kadarohman Ashfiya, Putri Sayyida Aziz, Hafiz Aji Billah, Egi Nursari Budiman Anwar Burhanuddin Ronggopuro Deni Ainur Rokhim Dermawan Afandy Dewi, Ratna Kumala Edy, Duwi Leksono Evi Susanti Evy Damayanthi Fadhil Md Din, Mohd Fadila Abna Swari Febriana, Silvia Fitri Khoerunnisa Hakiki, A.Riyan Rahman Hayuni Retno Widarti Hendrawan Hendrawan Hengky Pamungkas, Yahya Hidayati, Elvi Hidiyah, Tabita May Hong Chen Iasya, Yurin Karunia Apsha Albaina Ida Hamidah Iklima, Ilma Kanzu Imam Alfianto Isma Yanti Vitarisma Jacky Anggara Nenohai Kerinandhila, Kerinandhila Lakapu, Erlita Laurent Octaviana Li, Yu-You Lilik Eka Radiati Listyo Yudha Irawan Maharani, Brigitta Stacia Muh Ade Artasasta Muhammad Ali Murtadho Muhammad Reza Pahlevi Muhammad Roy Asrori Mujahidah, Amiroh Nabilah Muntholib Munzil Nurhayati, Mita Parlan . Prastiwi, Mellinia Regina Putri, Nanda Regita Qodriyah, Nur Romadhona Lailatul Retno Wulandari Riska N.M., Nofita RR. Ella Evrita Hestiandari Sarif Hidayat Shinta Yuliana Shrestha, Rajendra Prasad Sinta Yuliana Siti Mutmainah Siti Sendari Sitoresmi Prabaningtyas Sofinila, Mida Fitri Agasty Suharti Suharti Sumari Sumari Syamsul Bachri Taupik Hidayat, Taupik Wahab, Roswanira Abdul Wijayanti, Chandra Yahmin Yahmin Yaya Sonjaya Yudhi Utomo YULIANA, SHINTA Zarin Nafasari Zelen S. Minata