Jurnal Universitas PGRI Banyuwangi
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THE MAKING NATA DE ORANGE USING JUICEED ORANGE FRUIT EXTRACT (CITRUS SINENSIS (L.) OSBECK): PEMBUATAN NATA DE ORANGE MENGGUNAKAN EKSTRAK BUAH JERUK PERAS (CITRUS SINENSIS (L.) OSBECK)
No full textPenelitian ini bertujuan untuk mengetahui pemanfaatan buah jeruk sebagai bahan dasar produk olahan pangan, mengetahui pemanfaatan bahan dasar lain dalam pembuatan nata (selain kelapa), mengetahui ekstrak buah jeruk peras dapat digunakan dalam pembuatan nata de orange, mengetahui dan membandingkan kadar vitamin C, kadar asam asetat, kadar air dan organoleptik pada dua produk nata yang berbeda yakni nata de orange yang disintesis serta nata de coco pasaran. Jeruk peras dapat dijadikan sumber utama pembuatan nata selain air kelapa , karena dapat mengurangi penggunaan gula sebagai sumber karbohidrat dan urea sebagai sumber asam amino yang berperan penting untuk pertumbuhan bakteri Acetobacter Xylinum penghasil selulosa nata. Ekstrak perasan buah jeruk yang dipakai dalam penelitian ini mempunyai kadar protein sebesar 0,385% dan kadar karbohidrat sebesar 13,555%. Metode yang digunakan pada penelitian ini yaitu fermentasi nata de orange pada suhu 27-300C selama 10 hari. Untuk menentukan kadar vitamin C digunakan metode titrasi iodimetri, untuk menentukan kadar asam asetat digunakan metode titrasi asam basa (netralisasi), untuk menentukan kadar air digunakan metode pengeringan gravimetri. Hasil penelitian menunjukan bahwa nata de orange memiliki kadar vitamin C sebesar 5,02%, kadar asam asetat sebesar 0,040%, kadar air sebesar 82,3%. Nata de orange memiliki kadar vitamin C dan kadar air yang lebih tinggi serta kadar asam asetat yang lebih rendah dibandingkan nata de coco pasaran. Untuk uji organoleptik, nata de orange memiliki penilaian rata-rata 3,52, 3,33, 3,42, 3,57 dari 21 orang responden untuk warna, aroma, rasa, dan tekstur. Berdasarkan hasil penelitian yang telah dilaksanakan maka ekstrak air jeruk peras dapat digunakan sebagai bahan dasar pengganti air kelapa dalam pembuatan nata.
 
STUDI PENGARUH VARIASI PH DAN KOLEKTOR PADA EFISIENSI FLOTASI MINERAL TEMBAGA SULFIDA
No full textThis study aims to investigate the effect of pH variations and collector types on the recovery efficiency and Cu content in copper sulfide mineral samples. The experiment was conducted by varying the pH (6, 8, 10, and 12) and using different types of collectors, namely Xanthate, Potassium Amyl Xanthate (PAX), Diethyl Dithiophosphate (DTP), and a combination of PAX + DTP. Control variables included flotation time (5, 10, 15, 20, and 25 minutes), collector concentration at 50 mg/L, particle size <75 µm, and the use of Frother Methyl Isobutyl Carbinol (MIBC) at a concentration of 10 mg/L. Modifiers such as NaOH and H₂SO₄ were used to adjust the pH, while Copper Sulfate (CuSO₄) served as an activator and Sodium Metabisulfite (Na₂S₂O₅) as a depressant. The results showed that variations in pH and collector types significantly influenced recovery efficiency and Cu content in the concentrate. In general, the highest recovery efficiency was achieved at pH 10 with the combination of PAX + DTP, which resulted in a higher Cu content compared to other single collectors. This combination was able to improve recovery efficiency to over 75%, with Cu content in the concentrate reaching 28%. Therefore, the findings suggest the use of a collector combination and pH optimization as strategies to enhance the performance of copper sulfide flotation
SPECTROSCOPIC CHARACTERIZATION AND UV-PROTECTIVE POTENTIAL OF ARCANGELISIA FLAVA EXTRACT
No full textThe increasing demand for natural UV-protective agents has led to the exploration of plant-based bioactive compounds. Yellow root (Arcangelisia flava) extract is traditionally used in medicine and contains flavonoids, alkaloids, and terpenoids with potential photoprotective properties. This study aimed to characterize the chemical composition of A. flava extract and evaluate its UV-absorbing properties using UV-Vis and FTIR spectroscopy. The extract was obtained through maceration with ethanol, followed by spectroscopic analysis. The UV-Vis spectrum (200–400 nm) revealed multiple absorption peaks, particularly at 270 nm, 292 nm, 306 nm, 340 nm, 354 nm, 360 nm, and 396 nm, indicating the presence of UV-absorbing compounds. FTIR analysis confirmed the presence of hydroxyl (-OH), carbonyl (C=O), and aromatic (C=C) functional groups, which are characteristic of flavonoids and other bioactive compounds. These findings suggest that A. flava extract has potential as a natural UV-protective agent. Further studies on compound isolation, fractionation, and photostability assessments are required to optimize its purity and effectiveness in sunscreen formulations
A COMPREHENSIVE REVIEW OF VACCINE ADJUVANTS: CURRENT APPLICATIONS, DEVELOPMENT, AND IN SILICO DESIGN
No full textAdjuvants play a crucial role in modern vaccine formulations by enhancing immune responses, prolonging protection, and reducing the required antigen dose. Although several adjuvants have been globally licensed, the development of novel adjuvants still faces major challenges such as unpredictable immunogenicity, potential toxicity, and high in vivo testing costs. In silico approaches offer promising solutions for accelerating adjuvant design and validation in a more efficient and targeted manner. This review summarizes recent advances in computational methods for adjuvant development, including epitope prediction, molecular docking, molecular dynamics simulation, and the application of artificial intelligence. It also discusses currently licensed adjuvants and highlights case studies involving in silico-designed immune-receptor agonists such as Toll-like-receptor (TLR) ligands. Integrating empirical and bioinformatic strategies is expected to create new opportunities for developing safer, more specific, and personalized vaccine adjuvants. Key challenges and future research directions are also identified to optimize the incorporation of in silico approaches into global vaccine innovation
THE EFFECT OF FAMILY EDUCATION ON INCREASING KNOWLEDGE AND AWARENESS OF HEALTHY FOOD FOR MOTHERS AND CHILDREN IN PREVENTING STUNTING IN TAHAWA VILLAGE, CENTRAL KAHAYAN DISTRICT: PENGARUH EDUKASI KELUARGA NURANI TERHADAP PENINGKATAN PENGETAHUAN DAN KESADARAN MAKANAN SEHAT IBU DAN ANAK DALAM MENCEGAH STUNTING DI DESA TAHAWA KECAMATAN KAHAYAN TENGAH
No full textStunting is a health problem that has an impact on children's growth and development. Low knowledge and awareness of mothers about healthy food is the main factor that contributes to the high stunting rate. This study aims to analyze the influence of Family Conscience Education on increasing maternal knowledge and awareness in choosing healthy foods to prevent stunting in Tahawa Village, Central Kahayan District. The method used is quasi-experimental with a pretest-posttest design. A total of 55 mothers with children aged 0-5 years became respondents to the study. The results of the Paired Samples Test showed a significant increase in the knowledge aspect with an average score increase of 24.95 points (p < 0.05). The increase in awareness was also significant with the average score increasing by 1.46 points (p < 0.05). These results show that educational interventions are effective in improving maternal understanding of balanced nutrition and healthy diets. Community-based education programs can be a sustainable intervention strategy in stunting prevention
COLLATERAL GUARANTOR LIABILITY FOR DEBTS OF DEBTORS IN BANKRUPTCY
No full textThe insolvency of the debtor has legal consequences on the rights and obligations of the parties involved, including the collateral guarantor. Collateral guarantors have the responsibility to fulfil debt payment obligations if the main debtor is unable to pay off his obligations. This study aims to analyse the obligations of collateral guarantors in cases of debtor bankruptcy based on bankruptcy law in Indonesia. The research method used is normative juridical with a statutory and case approach. The results showed that collateral guarantors still have an obligation to fulfil debt payments even though the main debtor is declared bankrupt, unless there is an agreement that regulates otherwise. In addition, in practice, there are problems related to the execution of collateral and legal protection for guarantors in the bankruptcy system. Therefore, there is a need for legal certainty and a clearer protection mechanism for collateral guarantors in order to create a balance between the interests of creditors and guarantors. This research will discuss how bankruptcy law in Indonesia regulates the obligations of collateral guarantors in the event that the debtor experiences bankruptcy. This research will also analyse the problems that often arise in practice, and provide recommendations to clarify the legal protection mechanism for collateral guarantors
COMPARATIVE ANALYSIS OF STUDENT CHARACTER FORMATION THROUGH CHOIR EXTRACURRICULAR PROGRAMS AT SD MARSUDIRINI BSB AND SD NURUL ISLAM SEMARANG: ANALISIS PERBANDINGAN PEMBENTUKAN KARAKTER PESERTA DIDIK MELALUI PROGRAM EKSTRAKURIKULER PADUAN SUARA DI SD MARSUDIRINI BSB DAN SD NURUL ISLAM SEMARANG
No full textStudent character is still a challenge in elementary education, especially related to discipline, responsibility, and cooperation. This study aims to analyze and compare the role of extracurricular choir programs in character building for students at SD Marsudirini BSB Semarang and SD Nurul Islam. This study uses a descriptive qualitative approach with a case study method. Data were collected through observation, interviews, and documentation of students, teachers, coaches, and parents. Although both schools have extracurricular choirs, there are differences in intensity, technicalities, program achievements, and support and parental involvement that affect the results of character building for students. The results of the study indicate that the choir program has a significant impact on strengthening student character, especially in terms of discipline, cooperation, and responsibility. Differences in program implementation and intensity in both schools provide variations in student character outcomes. Structured practice activities and teamwork encourage students to build positive attitudes, such as valuing time and personal responsibility. . This study concludes that choir is an effective means of instilling character values in elementary schools and can be a contextual character building model
WOMEN'S PERCEPTION OF FADING BENEFITS FROM BEAUTY PRIVILEGE STEREOTYPES: PERSEPSI PEREMPUAN TENTANG PUDARNYA KEUNTUNGAN DARI STEREOTIP BEAUTY PRIVILEGE
No full textThe phenomenon of beauty privilege is closely related to the standardization of beauty in Indonesia, particularly within the context of the workplace. Stereotypes surrounding beauty privilege assume that individuals who meet conventional beauty standards or possess attractive appearances gain certain advantages, such as preferential treatment, ease in obtaining employment, or opportunities for promotion. However, current trends indicate a shift in perceptions regarding the benefits of beauty privilege. This study aims to explore working women’s perceptions of the evolving meaning of beauty privilege and its role in the workplace. A descriptive qualitative approach was employed, using convenience sampling. Data were collected through interviews with three female participants from diverse professional backgrounds. The findings reveal that while beauty privilege still exists in certain employment sectors, its advantages are gradually diminishing. There is now a growing emphasis on individual competencies in the workplace, accompanied by a growing awareness that physical appearance is no longer the primary determinant of professional success. One of the positive impacts of the fading influence of beauty privilege is the increased freedom to work without the pressure to conform to conventional beauty standards, as well as greater motivation to develop and optimize one’s abilities. Furthermore, the decline of beauty privilege stereotypes helps reduce social envy among employees. These findings also reinforce the argument that skills are becoming the key factor in the workplace, although physical appearance may still play a supporting role
THE EFFECT OF THE USE OF LETTER PUZZLE MEDIA ON THE READING ABILITY OF GRADE I STUDENTS OF SDN KARANGTENGAH PRANDON 2 NGAWI
No full textIn reading learning, it is shown that there are various difficulties experienced by grade I students of SDN Karangtengah Prandon2 Ngawi in reading, including inability to recognize letters, the absence or replacement of letters when reading, difficulties in reading word by word, and difficulties in distinguishing vowels and consonants. In addition, students also experience obstacles in combining letters and syllables into whole words, and pay less attention to the use of punctuation. These difficulty factors include low interest in learning to read, lack of motivation when participating in reading activities, The type of research used is using a quantitative approach with the Pre-Experimental Design type. The researcher used the One Group Pretest-Posttest Design research design to be carried out in one class without a comparison class using a pretest before being given treatment. With that, the results of the treatment can be known more accurately, because it can be compared with the situation before being given treatment. The results of this study are that there is a significant influence of the use of Letter Puzzle media on the reading ability of grade I students of SDN Karangtengah Prandon 2 Ngawi
THE EFFECTIVENESS OF THE PROBLEM BASED LEARNING AND SOCIAL SKILLS LEARNING MODEL ON THE CRITICAL THINKING ABILITY OF GRADE V STUDENTS OF SDN 101901 LUBUK PAKAM: Efektivitas Model Pembelajaran Problem Based Learning Dan Keterampilan Sosial Terhadap Kemampuan Berpikir Kritis Siswa Kelas V SDN 101901 Lubuk Pakam
No full textThis study aims to analyze the effectiveness of the Problem Based Learning (PBL) learning model and social skills on the critical thinking skills of grade V students of SDN 101901 Lubuk Pakam in Mathematics subjects. The research method used was a quasi-experiment with a 2x2 factorial design, involving 44 students who were divided into an experimental group (using PBL) and a control group (using an expository model). Data was collected through critical thinking ability tests and social skills observations, then analyzed using the two-path ANOVA test. The results of the study showed that: (1) The PBL model was effective in improving the critical thinking skills of students, both those who had high and low social skills, with the highest average score in the PBL group and high social skills (83.00). (2) The expository model is also influential, but it is more effective in students with high social skills (80.50) than in low (68.93). (3) There is a significant interaction between learning models and social skills in influencing critical thinking skills (p < 0.05). The implications of this study emphasize the importance of applying the PBL model to develop critical thinking skills, especially when supported by adequate social skills. Teachers are advised to design collaborative learning that not only focuses on problem-solving, but also trains students' social skills. These findings contribute to the development of Mathematics learning strategies in primary schools, especially in the face of the demands of 21st century skills