Jurnal Universitas PGRI Banyuwangi
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KONSEP PERSEGI DAN PERSEGIPANJANG DALAM POLA PENGUBINAN SEBAGAI BENTUK ANALISIS NUMERASI SISWA BERKEMAMPUAN TINGGI DI KELAS IX
No full textNumeracy is the ability of students to understand and use mathematical concepts in everyday life. In general, numeracy can be done by students with high abilities because it requires in-depth analysis. This study was conducted qualitatively, and aimed to analyze and describe the numeracy of high-ability students in grade IX as a comparison with the AKM results that had been carried out in grade VIII. The study was conducted at SMPN 5 Banyuwangi with 3 subjects selected purposively. Data validation was carried out by triangulation of methods which were realized through tests and interviews. Data analysis was carried out qualitatively. The results of the study showed that the numeracy of high-ability subjects was still not optimal. This condition is known from the failure to achieve the indicator of predicting alternative problem-solving results. This opens up opportunities to develop students’ abilities in predicting alternative problem-solving in subsequent studies
Sistem Monitoring Kualitas Air Kolam Ikan Koi dan Kontrol Berbasis IOT
No full textKoi fish is an ornamental fish with a considerable quantity of enthusiasts among the upper middle class. This makes the koi ornamental fish business widely developed because the value of the market price is quite high compared to some other types of ornamental fish. Koi farming is quite complicated to make its own problems in the conduct of koi fish farming. The number of variables that affect the growth, health, as well as the pattern and color of the fish makes treeger distinctive for some people to develop effective and efficient technology in the cultivation of ornamental fish species of koi. One of the benefits of developing technology to optimize koi fish farming by conditioning the feasibility of pond water using IoT in monitoring water conditions in koi ponds. Monitor pH and density using sensors in the water which is also a variable that affects the health and color and pattern enforced by utilizing microcontroller Esp 8266 and arduino uno R3 as the brain of the system. The prototype test was carried out by providing two treatments for water, namely acid and alkaline treatment of the pH value and water concentration to be adjusted. Prototype testing results provide satisfactory results compared to manual measurements. "Koi pond water quality Monitoring system and IOT-based automatic control" proved to function well to condition the pH and water density (ppm) so that it is assumed to improve the management of koi fish farming because of its automated system work and ease of technical monitoring
Data Mining dengan Menggunakan Metode Time Series Analysis pada Pola Waktu Tidur
No full textPenelitian ini membahas penerapan data mining dengan menggunakan metode Time Series Analysis pada pola waktu tidur. Objek penelitian adalah dataset pola tidur yang diperoleh dari Kaggle (https://www.kaggle.com) yang dimanfaatkan sebagai sumber utama dalam analisis. Metode Time Series Analysis digunakan untuk mengolah data numerik dengan rumus matematika guna mengidentifikasi pola tidur, sedangkan metode analisis sistem menggunakan UML untuk merancang alur sistem, mulai dari pengguna hingga aktivitas serta input yang dilakukan. Hasil penelitian menunjukkan bahwa sistem analisis pola waktu tidur dapat dirancang dengan tampilan yang mudah dipahami dan menarik. Proses analisis dilakukan dengan menentukan kategori yang relevan, yaitu durasi tidur dan kualitas tidur, kemudian diproses menggunakan metode Time Series Analysis. Output dari sistem berupa hasil analisis dalam bentuk grafik perkembangan durasi dan kualitas tidur serta rata-rata durasi tidur pada periode tertentu, yang dapat membantu memahami dan memantau pola tidur dengan lebih efektif
OPTIMASI KOMBINASI KAYU SECANG, JAHE, DAN STEVIA DALAM MENINGKATKAN KANDUNGAN TOTAL FENOL: OPTIMASI KOMBINASI KAYU SECANG, JAHE, DAN STEVIA DALAM MENINGKATKAN KANDUNGAN TOTAL FENOL
No full textTanaman herbal telah lama dimanfaatkan dalam pengobatan tradisional karena kandungan senyawa bioaktifnya, terutama fenol yang berfungsi sebagai antioksidan alami. Di antara tanaman tersebut, kayu secang (Caesalpinia sappan), jahe (Zingiber officinale), dan stevia (Stevia rebaudiana) dikenal memiliki potensi aktivitas antioksidan. Penelitian ini bertujuan untuk mengoptimasi kombinasi ketiga bahan tersebut guna meningkatkan kandungan total fenol dalam formulasi minuman herbal. Pendekatan eksperimen menggunakan metode Response Surface Methodology (RSM) dengan rancangan Central Composite Design (CCD). Proses ekstraksi dilakukan melalui metode infusa pada suhu terkendali, dan kandungan fenol dianalisis menggunakan metode Folin-Ciocalteu dengan spektrofotometer UV-Vis. Hasil analisis statistik menunjukkan bahwa kayu secang memberikan pengaruh kuadratik yang sangat signifikan (p < 0,0001) terhadap peningkatan kadar fenol, sedangkan jahe dan stevia tidak menunjukkan pengaruh yang signifikan baik secara individu maupun interaksi. Model regresi yang dihasilkan signifikan (p = 0,0014) dan sesuai dengan data eksperimen. Grafik kontur menunjukkan bahwa kombinasi konsentrasi menengah antara kayu secang dan jahe menghasilkan kadar fenol tertinggi. Sementara itu, stevia lebih berperan sebagai pemanis alami tanpa kontribusi signifikan terhadap senyawa fenolik. Hasil ini menunjukkan bahwa pengoptimalan proporsi kayu secang dan jahe dapat secara signifikan meningkatkan potensi antioksidan minuman herbal, serta mendukung pengembangan produk fungsional berbasis bahan alami lokal
PERBANDINGAN KARAKTERISTIK KOLAGEN KULIT IKAN GABUS, MAS DAN LELE
No full textCollagen is one of the proteins in animal, comprising approximately 30% of the total protein content in animals. It is commonly found in muscles, skin, and scales of animals. This study utilized three types of freshwater fish, namely snakehead fish, common carp, and catfish. Aim of the research was to compare the characteristics of skin collagen from snakehead fish, common carp, and catfish. The research method was an experimental design involving treatments on three different fish species with four replications. The parameters tested included yield, protein content, and moisture content. The results indicated that the highest yield was obtained from catfish skin collagen at 15.7%. The highest protein content was found at common carp skin collagen, while the best moisture content was observed from snakehead fish skin collagen
PEMANFAATAN BIOSORBEN BIJI BUAH RUDRAKSHA (Elaeocarpus Ganitrus) DALAM MENURUNKAN KADAR LOGAM BERAT CR(Vi) PADA SAMPEL AIR SUNGAI CITARUM
No full textAbstract
Hexavalent chromium Cr(VI) is a harmful heavy metal that frequently discovered in rivers that contaminated by industrial textile waste. Biosorption is a technique that utilizes natural materials to absorb metal ions from water. This research aims to asess efficacy of biosorbent derived from rudraksha ruit seeds in diminishing Cr(VI) concentration in water samples from the Citarum River through biosorption mechanism. The biosorption was conducted by applying the Citarum River water samples with the biosorbent at varying masses of 0.1 g, 0.5 g, 1.0 g, 1.5 g, and 2.0 g. Based on the research findings, the biosorption process reduced the concentrations of Cr(VI) in the water samples from the Citarum River. The highest reduction in Cr(VI) levels occurred at a biosorbent mass of 2.0 g, with percentage reductions of 92.02% and 96.24% for water samples from Rancamanyar Village and Andir Subdistrict, respectively. Therefore, it can be inferred that the biosorbent from rudraksha fruit seeds is effective in lowering Cr(VI) levels in Citarum River water samples.
Keywords: Heavy metal, Cr(VI), Biosorption, Rudraksha fruit seeds, Biosorbent
Abstrak
Kromium heksavalen Cr(VI) adalah logam berat berbahaya yang sering ditemukan di sungai yang terkontaminasi oleh limbah tekstil industri. Biosorpsi adalah teknik yang memanfaatkan bahan alami untuk menyerap ion logam dari air. Penelitian ini bertujuan untuk menilai efektivitas biosorben yang berasal dari biji buah rudraksha dalam mengurangi konsentrasi Cr(VI) dalam sampel air dari Sungai Citarum melalui mekanisme biosorpsi. Biosorpsi dilakukan dengan menerapkan sampel air Sungai Citarum dengan biosorben pada massa yang bervariasi yaitu 0,1 g, 0,5 g, 1,0 g, 1,5 g, dan 2,0 g. Berdasarkan temuan penelitian, proses biosorpsi mengurangi konsentrasi Cr(VI) dalam sampel air dari Sungai Citarum. Penurunan tertinggi kadar Cr(VI) terjadi pada massa biosorben 2,0 g, dengan penurunan persentase sebesar 92,02% dan 96,24% untuk sampel air dari Desa Rancamanyar dan Kecamatan Andir, masing-masing. Sehingga, dapat disimpulkan bahwa biosorben dari biji buah rudraksha efektif dalam mengurangi kadar Cr(VI) pada sampel air Sungai Citarum.
Keywords: Logam berat, Cr(VI), Biosorpsi, Biji buah rudraksha, Biosorbe
FORMULASI EKSTRAK DAUN KITOLOD (HIPOBROMA LONGIFLORA) DALAM SEDIAAN OBAT KUMUR ALAMI TERHADAP BAKTERI STREPTOCOCCUS MUTANS
No full textThe kitolod plant (Hippobroma longiflora) has been demonstrated to possess antibacterial activity against Streptococcus mutans, the bacterium responsible for the development of dental caries. The objective of this study was to formulate a mouthwash preparation using kitolod leaf extract. The extract was formulated into three distinct formulations. The mouthwash was evaluated for its pH, viscosity, stability, and antibacterial activity. The antibacterial evaluation was executed in accordance with the Kirby-Bauer method. The positive control utilized in this study was 0.2% chlorhexidine. The pH test results indicated that all three formulations had a pH of 6. The viscosity test demonstrated that all formulations had a viscosity of 0.99, which is close to that of water. The antibacterial evaluation against S. mutans indicated that formulation 2 demonstrated the most pronounced antibacterial activity, exhibiting an inhibition zone measuring 3.81 mm. All three formulations exhibited stability at ambient temperature. In light of the findings from this study, it can be posited that formulation 2 possesses the potential to serve as a natural mouthwash
STRATEGIES FOR ENHANCING THE PERFORMANCE OF LI [NIXCOYMN1-X-Y] O2 CATHODE MATERIALS FOR LI-ION BATTERIES
No full textAbstract
Li[NixCoyMn1-x-y]O2 layered oxides Cathode Materials are among the most widely studied cathode materials for lithium-ion batteries due to their high gravimetric and volumetric energy density compared to other type cathode materials. However, the practical deployment of Ni-rich NCM materials is hindered by severe degradation mechanisms, including cation-mixing, surface reconstruction, electrolyte reactivity, transition metal dissolution, and oxygen release, which compromise cycling stability and safety. This review systematically synthesizes recent progress in advanced modification strategies designed to mitigate degradation in Li[NixCoyMn1-x-y]O2 cathodes. The discussion is structured into four major approaches: (i) surface modification, which employs protective coatings to suppress interfacial reactions and stabilize the cathode–electrolyte interphase; (ii) elemental doping, which strengthens the lattice, reduces cation mixing, and inhibits oxygen evolution; (iii) single-crystal engineering, which eliminates grain-boundary failure and improves thermal stability; and (iv) concentration-gradient architectures, which alleviate internal stress and enhance the durability of Ni-rich cathodes. Empirical evidence demonstrates that these strategies not only extend cycle life but also provide mechanistic insights into the underlying degradation pathways. By consolidating findings from recent experimental, this review highlights the necessity of integrating structural, chemical, and morphological interventions to realize the full potential of Ni-rich NCM cathodes. The insights presented offer a framework for designing safer, higher-performance, and commercially scalable lithium-ion batteries.
Abstrak
Li[NixCoyMn1-x-y]O2 berbasis oksida berlapis merupakan salah satu material katoda yang paling banyak dikaji dalam pengembangan baterai litium-ion. Keunggulan utamanya terletak pada kerapatan energi gravimetri dan volumetri yang lebih tinggi dibandingkan dengan jenis katoda lain. Namun demikian, penerapan praktis material NCM kaya nikel masih menghadapi sejumlah kendala serius akibat berbagai mekanisme degradasi, antara lain pencampuran kation, rekonstruksi permukaan, reaktivitas dengan elektrolit, pelarutan logam transisi, serta pelepasan oksigen. Mekanisme-mekanisme tersebut secara langsung menurunkan stabilitas siklus dan tingkat keselamatan baterai.Ulasan ini menyajikan sintesis sistematis mengenai perkembangan mutakhir strategi modifikasi lanjutan yang dirancang untuk menekan degradasi pada katoda Li[NixCoyMn1-x-y]O2. Terdapat empat pendekatan utama yang dibahas, yaitu: (i) modifikasi permukaan, melalui penerapan lapisan pelindung guna menekan reaksi antarmuka dan menstabilkan lapisan katoda–elektrolit; (ii) doping unsur, yang berfungsi memperkuat struktur kisi, mengurangi pencampuran kation, serta menekan evolusi oksigen; (iii) rekayasa kristal tunggal, yang mengatasi kegagalan pada batas butir sekaligus meningkatkan stabilitas termal; dan (iv) arsitektur gradien konsentrasi, yang mampu meredam tegangan internal dan memperpanjang daya tahan katoda kaya nikel. Hasil-hasil empiris menunjukkan bahwa penerapan strategi tersebut tidak hanya memperpanjang umur pakai siklus, tetapi juga memperkaya pemahaman tentang mekanisme degradasi yang mendasari. Dengan mengintegrasikan temuan-temuan eksperimental terbaru, ulasan ini menegaskan pentingnya perpaduan intervensi struktural, kimia, dan morfologis untuk mengoptimalkan kinerja katoda NCM kaya nikel. Wawasan yang dihadirkan sekaligus menawarkan kerangka konseptual bagi pengembangan baterai litium-ion yang lebih aman, berkapasitas tinggi, dan memiliki prospek komersialisasi yang luas.
 
TEKNIK PEMBESARAN UDANG VANAME (Litopenaus vannamei) DENGAN SISTEM INTENSIF DI PT. BENTALA WINDU DESA BANJARSARI, KECAMATAN SUMBERASIH KABUPATEN PROBOLINGGO PROVINSI JAWA TIMUR
No full textUdang vaname (Litopenaeus vannamei) merupakan salah satu komoditas udang yang banyak dibudidayakan di Indonesia, udang vaname dikalangan masyarakat familiar disebut dengan udang putih karena berwarna putih dan tubuhnya transparan. Besarnya permintaan terhadap produk perikanan ini disebabkan oleh tingginya permintaan konsumen yang beralih konsumsi dari udang windu ke udang vaname. Metode yang digunakan berupa metode deskriptif dan data sekunder. Mekanisme kegiatan budidaya udang vaname dimulai dari persiapan kolam, persiapan air, penebaran benur, manajemen kualitas air, manajemen pakan dan pertumbuhan udang, manajemen kesehatan udang, dan manajemen panen. Hasil parameter kualitas air yang didapatkan selama kegiatan budidaya selama per minggu yaitu Salinitas 16-31 ppt, TOM (Total Organik Matter) 70-118 ppm, DO (Dissolved Oxygen) 5-8 ppm, pH 7,1-9, Alkalinitas 120-300 ppm, NO₂ 0,5-0,25, NO₃ 20-40 ppm, NH₄ 0,1-1,5, PO₄ 0,5-3. Analisis usaha yang didapatkan dalam 1 siklus pada kegiatan budidaya udang vaname di PT. Bentala Windu Kabupaten Probolinggo Provinsi Jawa Timur modal usaha budidaya udang vaname sebanyak Rp. 702.834.143
POTENTIAL AND BENEFITS OF SIJENTIKFRUIT (Baccaurea polyneura) AS A FUNCTIONAL FOOD FOR HEALTH
No full textThe sijentik fruit (Baccaurea polyneura) is a tropical fruit with potential as a functional food due to its rich bioactive content, including β-carotene, vitamin C, flavonoids, polyphenols, and tannins. These compounds exhibit antioxidant, anti-inflammatory, antimicrobial, and anticancer properties, providing significant health benefits. Despite its great potential, research on its health benefits and applications in the food industry remains limited. Therefore, this study aims to review the nutritional composition, bioactive compounds, and potential utilization of si jentik fruit in the food sector, based on a scientific literature review.This study employed a literature review method by identifying, evaluating, and synthesizing various studies related to the nutritional content, bioactive compounds, and health benefits of si jentik fruit. Data were obtained from scientific articles, books, and publications in electronic databases such as Google Scholar, PubMed, and ScienceDirect. The inclusion criteria consisted of articles published within the last ten years, relevant to functional food and health aspects. The review findings indicate that si jentik fruit has high antioxidant activity, contributing to a reduced risk of degenerative diseases such as cardiovascular disease, diabetes, and cancer. The flavonoids in this fruit exhibit anti-inflammatory properties, which help reduce chronic inflammation. In the food sector, si jentik fruit can be utilized as a functional beverage ingredient, natural colorant, natural preservative, and as an additive in processed food products such as jams, syrups, and bread. Fermentation has also been shown to enhance the antioxidant activity of si jentik fruit, allowing for its application in probiotic products and nanoencapsulation technology