Reduksi Emisi Partikulat dari Peleburan Limbah Plastik: Tinjauan Teknologi Filtrasi Udara Berbasis Bahan Alami

Emisi gas dan partikel halus hasil dari proses peleburan limbah plastik dalam pembuatan paving block dapat memberikan dampak negatif terhadap lingkungan dan kesehatan manusia. Review penelitian ini bertujuan untuk mengkaji berbagai jenis emisi yang dihasilkan selama proses peleburan dan mengevaluasi teknologi filtrasi yang paling efektif dalam mereduksi polutan udara. Metode penelitian dilakukan melalui studi literatur dari berbagai jurnal terkait emisi dari proses peleburan plastik serta teknologi filtrasi yang tersedia. Hasil kajian menunjukkan bahwa emisi utama mencakup senyawa organik volatil (VOC), dioksin, furan, karbon monoksida (CO), dan partikel halus (PM10 dan PM2.5). Berdasarkan analisis, kombinasi filter HEPA, karbon aktif, dan scrubber basah berbasis larutan alkali merupakan solusi optimal dalam mengurangi dampak emisi. Penelitian ini juga mengusulkan model filtrasi berbahan alami yang dinamakan AIRPUSAKA, yang terdiri dari air kapur, sabut kelapa, dan karbon aktif tempurung kelapa, sebagai solusi alternatif yang ramah lingkungan untuk aplikasi industri daur ulang plasti

Karakteristik Fisikokimia dan Analisis Kelayakan Air Tanah Dangkal di Teluk Belitung, Kepulauan Meranti, Riau

Teluk Belitung berada di pesisir Pulau Padang, Meranti, sangat bergantung pada keberadaan airtanah sebagai sumber air bersih yang dimanfaatkan dalam kehidupan sehari – hari. Namun, airtanah dangkal di permukiman yang berdekatan dengan laut cenderung memiliki rasa payau hingga asin, serta dapat menyebabkan karat pada peralatan makan. Tujuan penelitian ini adalah untuk mengetahui karakteristik fisikokimia dan kelayakan airtanah dangkal di daerah penelitian. Hasil pengukuran parameter fisikokimia dibandingkan dengan Peraturan Menteri Kesehatan No.492/MENKES/PER/IV/2010 tentang standar kualitas air minum. Hasil penelitian menunjukkan 58% air tanah berwarna keruh, 12% berwarna coklat kemerahan, 12% tidak berwarna, 6% berwarna kuning, 6% berwarna kuning kecoklatan, dan 6% berwarna coklat. 64% air tanah berasa payau, 18% berasa asin dan 18% tidak berasa. TDS air tanah 23,85 mg/L - 10.458 mg/L. DHL air tanah 36,45 μS/cm - 16.970 μS/cm. pH air tanah 6,86 - 7,45. 88% air tanah memiliki kesadahan ≤ 500 mg/L dan 12% memiliki kesadahan > 500 mg/L. 53% air tanah memiliki kadar Cl- > 250 mg/L dan 47% memiliki kadar Cl- ≤ 250 mg/L. Semua stasiun memiliki kadar SO42- ≤ 250 mg/L. Daerah penelitian dapat dibagi menjadi 3 zonasi, yaitu zona risiko tinggi (tidak layak) sebanyak 35%, zona risiko sedang (berisiko) sebanyak 29% dan zona risiko rendah (cenderung layak) sebanyak 36%. Penelitian ini diharapkan dapat memberikan informasi dasar bagi pengelolaan sumber daya air yang berkelanjutan dan pemenuhan kebutuhan air bersih di Kepulauan Meranti

Triple Helix Governance for Strengthening Islamic Boarding School Agribusiness

Islamic boarding schools increasingly function not only as religious educational institutions but also as drivers of local economic development. This study aims to analyze the implementation of Triple Helix Governance in strengthening Islamic boarding school–based agribusiness through the Trubus Sentra Agrobisnis (TSA) Producer Cooperative in Paser Regency. This research applies a qualitative case study method using interviews, observation, and document analysis to explore collaboration among government institutions, business actors, and research organizations. The results show that the development of TSA is supported by strong collaboration among key stakeholders. Government institutions provide policy support and facilitation, research institutions contribute technological innovation, while business actors and zakat-based organizations strengthen economic networks and production capacity. This collaborative governance model enhances institutional capacity and supports sustainable agribusiness development. The study demonstrates that Islamic boarding schools can transform into community-based economic institutions through cooperative mechanisms. The integration of religious values, innovation, and policy support makes TSA a replicable model for strengthening local agribusiness governance and sustainable regional development

Smart Mobility Development Through Public Transportation in the Special Region of Yogyakarta

This research was conducted to determine the readiness of the Special Region of Yogyakarta (DIY) Government in realizing smart mobility through Trans Jogja public transportation services. Amidst the challenges of urbanization and the increasing need for efficient mobility, this research examines the implementation of the smart mobility concept in the context of Trans Jogja as a Bus Rapid Transit (BRT) system. The research method used is descriptive qualitative, with data collection through semi-structured interviews with representatives of the DIY Transportation Agency, PT AMI, and Trans Jogja users. The results showed that the DIY Government has made efforts to develop Trans Jogja services based on smart mobility, including fleet and route upgrades, as well as the utilization of the Trans Jogja application. However, the provision of more efficient and equitable routes, the addition of bus stops, and maximizing service convenience still need more attention

EFEKTIVITAS SUMBER NITROGEN PADA PUPUK ORGANIK YANG BERBEDA SEBAGAI SUBSTITUSI UREA PADA NUTRIEN KULTUR Nannochloropsis sp.

Nitrogen is one of the nutrients needed Nannochloropsis sp., but there is no determination of fertilizer dosage based on fertilizer nitrogen source. This study aims to determine the provision of organic fertilizers capable of substituting urea in nutrient cultures Nannochloropsis sp. and effective used as a source of nitrogen for cell populations Nannochloropsis sp.. This research was conducted in April-May 2025 at the Batam Marine Aquaculture Center. This study used a complete randomized design (RAL) with 1 Control and 3 treatments, namely: control (50 mg/L Urea, Za, TSP, EDTA), treatment a (dung bats, Za, TSP, EDTA), treatment B (Quail Dung, ZA, TSP, EDTA), treatment C (Dung swallows, ZA, TSP, EDTA), each 3 replications. The observed parameters include daily density, population peak, doubling time, light intensity and water quality. Results showed for 7 days maintenance of cell density Nannochloropsis sp. the highest growth was found in h-5 maintenance with the highest growth in treatment B (quail droppings) is 23.193.055 cells/ml with the fastest doubling time is 36.3 hours and the lowest growth in control is 17.468.056 cells/ml with the longest doubling time is 52.3 hours. The peak population for control and all treatments is found on H-5 maintenance. The light intensity during the study ranged from 9.100 lux. This result shows that the fertilizer of bat droppings, quail droppings and bird droppings can be a substitution of urea and effective as a source of nitrogen in the nutrient culture Nannochloropsis sp. for cell populations Nannochloropsis sp..Nitrogen adalah salah satu unsur hara yang dibutuhkan Nannochloropsis sp., namun belum ada penentuan dosis pupuk berdasarkan sumber nitrogen pupuk. Penelitian ini bertujuan untuk mengetahui pemberian pupuk organik mampu menjadi substitusi urea pada nutrien kultur Nannochloropsis sp. dan efektif digunakan sebagai sumber nitrogen untuk populasi sel Nannochloropsis sp.. Penelitian ini dilaksanakan pada bulan April – Mei 2025 di Balai Perikanan Budidaya Laut Batam. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan 1 kontrol dan 3 perlakuan yaitu: Kontrol (50 mg/L Urea, Za, TSP, EDTA), perlakuan A (Kotoran kelelewar, Za, TSP, EDTA), perlakuan B (Kotoran burung puyuh, ZA, TSP, EDTA), perlakuan C (Kotoran burung walet, ZA, TSP, EDTA), masing – masing 3 ulangan. Parameter yang diamati meliputi kepadatan harian, puncak populasi, doubling time, intensitas cahaya dan kualitas air. Hasil menunjukkan selama 7 hari pemeliharaan kepadatan sel Nannochloropsis sp. tertinggi terdapat pada H-5 pemeliharaan dengan pertumbuhan tertinggi pada perlakuan B (kotoran burung puyuh) yaitu 23.193.055 sel/ml dengan doubling time tercepat yaitu 36,3 jam dan pertumbuhan terendah pada Kontrol yaitu 17.468.056 sel/ml dengan doubling time terlama yaitu 52,3 jam. Puncak populasi untuk kontrol dan semua perlakuan terdapat pada H-5 pemeliharaan. Intensitas cahaya selama penelitian berkisar 9.100 lux. Hasil ini menunjukkan bahwa pupuk kotoran kelelawar, kotoran burung puyuh dan kotoran burung walet mampu menjadi substitusi urea  dan efektif digunakan sebagai sumber nitrogen pada nutrien kultur Nannochloropsis sp. untuk populasi sel Nannochloropsis sp.

Analysis of Indonesia’s Primary Weapon Systems Modernization Policy as a Geopolitical Strategy in Southeast Asia, 2020–2025

The geopolitical dynamics of Southeast Asia during the 2020–2025 period have been shaped by intensifying great power rivalry, rising tensions in the South China Sea, and the transformation of security threats toward multidimensional forms, positioning the modernization of Indonesia’s main weapon systems (alutsista) as a critical instrument for strengthening national defense while reinforcing the country’s geopolitical posture. This study analyzes Indonesia’s defense modernization policy as a geopolitical strategy and identifies structural constraints affecting its implementation through a qualitative descriptive policy analysis based on literature review and secondary data from defense policy documents, government reports, and international security publications, grounded in realist theory and foreign policy analysis that emphasize the state’s role within an anarchic system characterized by power competition and security dilemmas. The findings indicate that modernization performs a dual defense–geopolitical function by enhancing military readiness, supporting Minimum Essential Force (MEF) targets, strengthening deterrence, maintaining regional balance of power, and elevating Indonesia’s strategic bargaining position; however, its effectiveness remains constrained by limited defense budgets, technological dependence on foreign suppliers, underdeveloped domestic defense industry capacity, and inconsistent long-term strategic planning. The study also evaluates modernization through indicators of deterrence posture, strategic signaling, and defense industrial autonomy to measure its geopolitical effectiveness beyond material capability enhancement. The study concludes that the success of defense modernization as a geopolitical strategy depends on the integrated alignment of defense policy, defense diplomacy, and national defense industrial development to achieve sustainable strategic autonomy and reinforce regional stability amid intensifying geopolitical competitio

Framing Analysis of Basuki Hadimuljono as Head of the Nusantara Capital Authority through Instagram in Supporting the Development of the Nusantara Capital City (IKN) in 2025

This study examines how Basuki Hadimuljono, as Head of the Nusantara Capital Authority, strategically employs Instagram to frame the development of Indonesia’s Nusantara Capital City (IKN) in 2025. Using a qualitative content analysis approach based on Entman’s four element framing model define problems, diagnose causes, make moral judgments, and treatment recommendations, the study analyzes selected Instagram posts featuring visual narratives, textual captions, and audience engagement. The results reveal that Basuki consistently frames IKN development by emphasizing sustainability, human resource development, cultural preservation, progress monitoring, and institutional legitimacy. Visuals and narratives highlight development achievements, ecological responsibility, moral ethical commitments, and concrete solutions, positioning IKN as a well managed, future oriented national project while reinforcing Basuki’s technocratic image. Public engagement, reflected in likes and comments, indicates that the framing successfully generates positive perceptions and trust toward IKN initiatives. The study contributes to digital political communication literature by demonstrating how visual based social media functions as a strategic tool for shaping public opinion, enhancing legitimacy, and mobilizing support for large-scale national project

Perbandingan Aktivitas Anti-Hiperurisemia Ekstrak Etanol Seledri (Apium Graveolens L.) Dan Daun Salam (Syzygium Polyanthum) Pada Mencit Yang Diinduksi Kafein

Celery plants (Apium Graveolens L) and bay leaves (Syzygium polyanthum) have been used as alternative medicine to treat Hyperuricemia. This study aimed to determine the effectiveness of administration of extracts from celery plants and bay leafs to decrease uric acid levels in blood.  This research used a post-test control group only design. A total of 24 male mice (randomly divided into 4 groups; P0, P1, P2 and P3). P0 was the control group (induced with caffeine at a dose of 0.5 mg/kgBW). P1 was induced with caffeine 0.5 mg/kgBW+celery extract 35 mg/kgBW, P2 was induced by caffeine 0.5 mg/kgBW+bay leaf extract 35 mg/kgBW and P3 was induced by caffeine + a combination of celery plant extract and bay leaves 35mg/kgBW. Uric acid levels were measured using an easy touch GCU meter device. The results showed that average of uric acid level for P0, P1, P2 and P4 were 7.1mg/dl; 4.9 mg/dl; 4 mg/dl; and 5.2 mg/dl, respectively. The most significant antihyperuricemia activity was demonstrated by administering 35 mg/kgBW of bay leaf extract.  The One Way ANOVA analysis described that the administration of extract ethanol generated significant effects (p-value <0.05). Based on post hoc LSD analysis, it was found that the administration of ethanol extract from bay leaves showed significant differences compared to combination (celery + bay leaves) in lowering uric acid levels. Therefore, it was concluded extract from celery and bay leaves can be used to lower the level of uric aci

POTENSI EKSTRAK BERUNOK (Paracaudina australis) SEBAGAI ANTIOKSIDAN,INHIBITOR α-GLUKOSIDASE DAN ANTI-KOLESTEROL

Paracaudina australis (Berunok) merupakan organisme laut yang memiliki prospek sebagai sumber metabolit bioaktif, meskipun kajian ilmiah terkait potensi antioksidan, penghambatan enzim α-glukosidase, dan kemampuan menurunkan kolesterol masih sangat minim. Studi eksploratif awal ini dirancang untuk mengkaji kemampuan ekstrak teripang berunok dalam menghambat radikal bebas, aktivitas α-glukosidase, serta efek hipokolesterolemik secara in vitro dengan memanfaatkan sistem pelarut bertingkat polaritas. Tahapan persiapan sampel dan proses ekstraksi menggunakan tiga jenis pelarut yaitu metanol, etil asetat, dan n-heksan, diikuti dengan identifikasi metabolit sekunder serta pengujian kapasitas antioksidan melalui metode DPPH, uji hambatan terhadap α-glukosidase, dan evaluasi aktivitas anti-kolesterol. Analisis fitokimia menunjukkan keberadaan senyawa steroid/terpenoid pada seluruh fraksi pelarut yang digunakan, sementara metabolit saponin hanya terdeteksi pada fraksi metanol. Kapasitas penangkapan radikal bebas tertinggi ditunjukkan oleh ekstrak metanol dengan IC₅₀ mencapai 223,37 ppm, mengungguli ekstrak etil asetat (414,63 ppm) dan n-heksan (626,56 ppm). Meskipun demikian, seluruh ekstrak teripang berunok menunjukkan kemampuan yang belum optimal dalam menginhibisi 50% aktivitas αglukosidase, namun pada konsentrasi 1000 ppm, ekstrak metanol masih menunjukkan inhibisi sebesar 4,12±0,40%. Untuk aktivitas anti-kolesterol, ketiga sampel memperlihatkan efektivitas dengan ekstrak metanol sebagai yang paling unggul dengan nilai 44,83±0,99 mg/mL

Chemistry Online Course: its Implementation for Preservice Chemistry Teachers’ Profile of Collaboration Skills and Communication Confidence

The development of sience, technology, and transformation in various sector allows the need of capable measure: how effective their role in learning interactions. This study seeks to reveal the profile of collaboration skills (CS) and communication confidence (CC) of pre-service chemsitry teacher (PCT). Convenience sampling technique was adopted for this study. A total of 26 PCTs were involved as research samples. The research intervention was conducted through six online lectures for PCT. Group discussions and presentations were implemented to collect data. Therefore, non-tests were used as data collection techniques. Data were obtained through two closed-ended questionnaires: the Collaborative Skill Questionnaire (CS-Q) and the Communication Confidence Questionnaire (CC-Q). The validity of the instruments was tested theoretically and empirically. Sixteen of the 20 CS-Q items and 22 of the 30 CC-Q items were valid. The Cronbach\u27s alpha reliability estimates for the CS-Q and CC-Q instruments were 0.753 and 0.804, respectively. With data in the form of a Likert scale, descriptive statistics were used to analyze the profile levels of the PCT-CS and PCT-CC. The level criteria were divided into five categories. Based on these results, the PCT-CS was generally at a good level. Meanwhile, the PCT-CC level was sufficient. Based on the research results that have gone through the data analysis stage, learning activities need to implement methods that are capable of training PCT-CS and PCT-C