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International Journal of Science and Environment
Published by CV. Inara
ISSN : -     EISSN : 28090551     DOI : https://doi.org/10.51601/ijse.v2i4
Core Subject : Science, Education, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Mathematics Physics
International Journal of Science and Environment (IJSE) is to provide a research medium and an important reference for the advancement and dissemination of research results that support high-level research in the fields of Science and Environment . Original theoretical work and application-based studies, which contributes to a better understanding all fields of Science and Environment. The aim and scope of the journal Chemistry, Chemical Analysis, Physical Chemistry, Physics, Biology, Ecology, Biodiversity, Zoology, Biochemistry, Mathematics, Environmental Science, Agriculture, Environment, Forestry.
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 300 Documents
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Potency Evaluation of Temulawak Through Physicochemical, Pharmacokinetics, Druglikeness, Water Solubility, Tox Prediction for KUB Chickens Cahyowati, Meireni; Ahmad Priyadi, Dwi; Hasbi Ash Shidiqi, Moh
International Journal of Science and Environment (IJSE) Vol. 5 No. 4 (2025): November 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i4.281

Abstract

Temulawak is one of the spices in Indonesia that is useful as a phytobiotic. Phytobiotics are beneficial for livestock in maintaining health, namely maintaining immunity, especially in chickens. One type of chicken that is widely cultivated in Indonesia is the KUB chicken to increase its productivity. This study aims to identify the potential compounds found in temulawak (Curcuma Xanthorrhiza). The research methods included literature studies and ADMET testing. The most abundant compound in temulawak was β-Curcumene with a molecular weight of 204.35 g/ml, a hydrogen bond donor count of 0, a hydrogen bond acceptor count of 0, and a TPSA value of 0.00 Å2 . The β-Curcumene compound is not classified as an inhibitor of CYP1A2, CYP2C19, CYP2D6, CYP3A4. β-Curcumene has drug-like properties according to the rules of Lipinski, Ghose, Veber, Egan but does not have drug-like properties according to Muegge's rules. The log S ESOL value of -4.93 is in the moderate solubility category, the log S SILICOS – IT value of -3.55 is good solubility, and the log S Ali value of -6.27 is in the poor solubility category. β-Curcumene has toxic compounds that are active and affect BBB-barrier performance by 97%, ecotoxicity target by 64%, estrogen hormone performance by 75%, and drug metabolism performance by 65%.
Strengthening the Gyeongsangbuk–West Java Sister Province Relationship through Cultural Exchange at the 8th Global Youth Camp Muthi Najwa Hanifa; Windy Dermawan
International Journal of Science and Environment (IJSE) Vol. 5 No. 4 (2025): November 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i4.282

Abstract

This study analyzes the subnational cooperation between West Java Province, Indonesia, and Gyeongsangbuk-do Province, Republic of Korea, through the 8th Global Youth Camp 2025. Held on August 17–23, 2025, in collaboration with Sangji Catholic University, the event gathered youth delegates from six Asian countries to promote intercultural understanding and regional collaboration. Using a descriptive–qualitative approach, the research explores how this program reflects West Java’s paradiplomacy efforts within Indonesia’s foreign policy framework. The findings show that West Java’s participation strengthens its international presence, enhances youth capacity, and expands global partnerships while aligning with Indonesia’s public diplomacy goals. The cooperation also demonstrates how subnational diplomacy can balance national interests with regional development needs. Overall, the West Java–Gyeongsangbuk-do partnership serves as a model for effective paradiplomacy that fosters mutual growth, people-to-people connections, and sustainable international engagement
Clinical Functional Profile of the Hands of Patients with Rheumatoid Arthritis at Royal Prima Hospital Medan Coray Carolyn Ruth Pardede, Eifel; Alexander, Rico; Chiuman, Linda
International Journal of Science and Environment (IJSE) Vol. 5 No. 4 (2025): November 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i4.284

Abstract

Rheumatoid arthritis (RA) is a chronic autoimmune disease that frequently causes progressive joint damage, particularly in the hands, resulting in impaired functional ability in daily activities. This study aims to describe the hand function of patients with rheumatoid arthritis based on age, gender, and family history at Royal Prima Hospital Medan. This research employed a descriptive quantitative design with a cross-sectional approach involving 55 respondents who met the inclusion criteria. Data were collected using a structured hand function questionnaire assessing right hand, left-hand, and bilateral hand function across various activities. Data analysis was conducted using univariate and bivariate descriptive methods through cross tabulation. The results showed that hand function impairment was most prominent in patients aged >40 years, who predominantly fell into the “poor” function category. Female respondents demonstrated a higher level of functional limitation compared to males. Meanwhile, a family history of RAcontributed as a predisposing factor but did not directly correlate with the severity of functional impairment. Patients with a family history tended to fall within the “moderate” category, while more severe impairment was observed among those without a family history. Older age and female gender are major factors associated with reduced hand function in RA patients, whereas family history serves as a predisposition rather than a determinant of severity.
Optimization of Bio-Additive Formulation Using Subang Citronellal, Clove, and Patchouli: Evaluation of Density, Power Output, and CO₂–O₂ Emissions Rahmawati, Rahmi; Aprilliani, Fenny; Muhammad Malikul Adil, Nur
International Journal of Science and Environment (IJSE) Vol. 5 No. 4 (2025): November 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i4.285

Abstract

This research examined the potential of essential oil–based bio-additives derived from citronella, clove, and patchouli to enhance the physicochemical properties, engine performance, and emission characteristics of Pertalite fuel. The study utilized Response Surface Methodology (RSM) with a Central Composite Design (CCD) to assess additive concentrations between 0.1 and 0.3 mL per liter of Pertalite. Findings indicated that these low-level additions did not significantly affect density, which remained similar to pure Pertalite. Likewise, power output and exhaust emissions (CO2 and O2) showed no notable improvements. Statistical evaluation using Design Expert® revealed all regression models were non-significant (p > 0.05), and optimization attempts failed to identify a valid optimum, with desirability values below 0.5. The minimal impact is attributed to the very low additive dosage, insufficient to influence atomization, combustion, or emission reduction. Additionally, gasoline’s non-polar nature limits sensitivity to parameters such as pH, while operational variations during engine testing (temperature, RPM, and load) may have masked minor effects. In summary, essential oil bio-additives at concentrations below 0.03% by volume are ineffective for measurable improvements. Future studies should investigate higher concentrations, purification of active compounds, improved blending techniques, and stricter engine testing protocols. The contribution of oxygenated compounds to combustion enhancement also merits further exploration.
Plankton Diversity In The Labuhanbatu Bilar River Rosenta Purba, Ika; Harahap, Arman
International Journal of Science and Environment (IJSE) Vol. 2 No. 2 (2022): May 2022
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v2i2.27

Abstract

The purpose of this study was to determine the plankton diversity index in the Labuhanbatu Bilah River. The research was carried out from January to March 2023 using the Purposive Random Sampling method which consisted of 3 observation stations, namely station 1. There were many community activities such as Domestic Waste, Sand Mining, Agriculture, Station 2. There was Domestic Waste, Cage Fish Farming and Agriculture. and Station 3. There are community activities such as bathing, domestic and agricultural waste. The results of the study found that the plankton composition in the Bilah Labuhanbatu River consisted of 3 classes of phytoplankton, namely Bacillariophyceae, Chlorophyceae and Cyanophyceae while the class of zooplankton consisted of 4 classes, namely Mastigophora, Monogononta, Crustacea and Ciliophora. The highest diversity index of phytoplankton was obtained at station 1 of the sand mining area with a value of 1.76 indicating that the level of diversity was included in the medium category. In zooplankton the highest diversity index was found at station 3 with a value of 0.42 which indicated that the level of diversity was included in the low category. Meanwhile, the highest dominance index for phytolactones was found at station 3 in a densely populated area with a value of 0.51, while for zooplankton it was found at station 1 in a sand mining area with a value of 0.00487, both values ​​indicating that no plankton genus dominates in the area. In zooplankton the highest diversity index was found at station 3 with a value of 0.42 which indicated that the level of diversity was included in the low category. Meanwhile, the highest dominance index for phytolactones was found at station 3 in a densely populated area with a value of 0.51, while for zooplankton it was found at station 1 in a sand mining area with a value of 0.00487, both values ​​indicating that no plankton genus dominates in the area. In zooplankton the highest diversity index was found at station 3 with a value of 0.42 which indicated that the level of diversity was included in the low category. Meanwhile, the highest dominance index for phytolactones was found at station 3 in a densely populated area with a value of 0.51, while for zooplankton it was found at station 1 in a sand mining area with a value of 0.00487, both values ​​indicating that no plankton genus dominates in the area.
Strategic Decision-Making to Increase Transaction Volume and Customer Loyalty at AHASS Bersama Jaya Prima Hanawa, Zahran; Hermawan, Pri
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.118

Abstract

The goal of this study was to find out how to make smart choices that would lead to more sales and more loyal customers at AHASS Bersama Jaya Prima, the official Honda workshop in Bekasi. Even though the economy is getting better again after the pandemic, their business is still stuck. This is mostly because service visits have dropped by about 40% from what they were before the pandemic. For this study, we ran a qualitative case study. We basically talked to key people, like the customers, the staff, and the suppliers, to understand the whole picture. The main way we analyzed the data was using Root Cause Analysis (5 Whys), and then we used the Theory of Planned Behavior (TPB) idea to explain what was going on. The results showed that the biggest problem is that things aren't run efficiently. Especially, they keep messing up the Standard Operating Procedures (SOPs) because everyone is so focused on serving many people fast instead of giving good quality service. This situation just gives customers a bad time, makes them wait longer, and makes them unhappy with the service. We then used Analytic Hierarchy Process (AHP) to pick the best move, and the clear winner was setting up a digital queue and booking system. This new system should help customers feel more in control (perceived behavioral control), fundamentally smooth out service bottlenecks, and definitely help bring customer loyalty back up so the business can recover properly.
The Influence of Price and Coffee Shop Atmosphere on Coffee Shop Consumer Satisfaction in Sampit City Cahyo Purnomo, Eko; Susanto, Hari; Prasetyo, Deky; Rulliansyah, Sylva
International Journal of Science and Environment (IJSE) Vol. 5 No. 4 (2025): November 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i4.258

Abstract

This study aims to analyze the influence of price and atmosphere on consumer satisfaction at Coffee 1999 in Sampit City. The research method used is a quantitative approach with data collection through questionnaires to respondents who are Coffee 1999 customers. The data analysis technique uses multiple linear regression analysis with t-test (partial), F-test (simultaneous), and coefficient of determination (R²). The results of the study show that: (1) the price variable has a positive and significant effect on consumer satisfaction with a calculated t-value (3.655) > t-table (2.02809) and significance (0.001 < 0.05); (2) the atmosphere variable also has a significant effect on consumer satisfaction with a calculated t-value (2.337) > t-table (2.02809) and significance (0.025 < 0.05); and (3) the results of the simultaneous test show that price and atmosphere together have a significant effect on consumer satisfaction with an F-count value (31.152) > F-table (3.26) and significance (0.000 < 0.05). The R² value of 0.627 indicates that the two independent variables influence consumer satisfaction by 62.7%, while the remaining 37.3% is influenced by other variables. This study confirms that the implementation of the right pricing strategy and the creation of a comfortable café atmosphere are important factors in building and maintaining customer satisfaction.
The Influence of Products and Promotions on Consumer Decisions to Study at the Sampit College of Economics Hendry Yono, Elia; Riassy Christa, Usup; Sambung, Roby
International Journal of Science and Environment (IJSE) Vol. 5 No. 4 (2025): November 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i4.259

Abstract

This study aims to determine the Influence of Products and Promotions on Consumer Decisions, Faculty of Economics and Business, University of Palangkaraya. This study aims to determine and analyze the influence of Promotions and Products on Consumer Decisions at the Sampit College of Economics, the sampling technique in this study uses Random Sampling techniques carried out through Observation and Questionnaires. The number of sample sizes taken is 80 samples which are students of the Sampit College of Economics class of 2023. The analysis tool used is SemPLS 4.0. The results of this study indicate that Promotions and Products have a positive and significant influence on Consumer Decisions at the Sampit College of Economics.
Managerial Decision-Making for Process Optimization in CV Jaya Mandiri Textile Operations: Hegemoni Digital Arif Budiman, Satrio; Hermawan, Pri
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 2026
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i1.274

Abstract

In today's highly competitive and dynamic business environment, small and medium enterprises (SMEs) must constantly adapt to operational challenges that threaten efficiency and customer satisfaction. CV Jaya Mandiri, an SME based in Malang, engaged in textiles and interior solutions, is currently facing a critical issue of long process times, with customer orders taking up to two weeks from inquiry to final installation. This long waiting period has resulted in customer dissatisfaction, loss of competitiveness, and risks to long-term sustainability. Despite consistent product quality and strong market demand, inefficiencies in the company's internal processes have restricted its ability to deliver convenient service. These challenges highlight the urgent need for process optimization supported by informed managerial decision making. The research aims to address these operational inefficiencies by analyzing the current business processes of CV Jaya Mandiri, identifying root causes of delays, and proposing optimized workflows that reduce process time while aligning with the company's resource capabilities. the research uses a qualitative case study approach. Data is collected through semi-structured interviews with key stakeholders, direct field.
Proposed Marketing Strategy to Enhance Customer Retention for PT Eldira Fauna Asahan Nabilah Setiawan, Adelia; Aprianingsih, Atik
International Journal of Science and Environment (IJSE) Vol. 5 No. 4 (2025): November 2025
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v5i4.277

Abstract

In business-to-business firms that are in the commodity markets with limited product differentiation, customer retention is very crucial. This study studies customer purchasing behavior and retention variables in the industry North Sumatra livestock industry by the case study of PT Eldira Fauna Asahan which is cattle fattening company that has gone through a five-year period of fifty five percent sales decline even though product and price remained the same. Using qualitative case study as the research method, semi-structured interviews were carried out on five business customers and three employees of the company to learn about the process of organizational buying decisions in the eight-stage business buyer decision process. The Service Quality Gap Model analysis indicates that the main cause of customer attrition is the inconsistency of service delivery at the peak periods and not the product or price quality. Customers stated high satisfaction with the quality of cattle and price competitiveness although the level of service declined with high levels due to delays in communication, facing uncertainty to coordinate delivery and to be responsive to customers when staff capacity became limiting. Internal analysis reveals that there is a lack of customer service expectations, lack of standard service protocols and reactive operation methods in the management that create gaps in the services that undermine customer trust. The study suggests a holistic approach, which has four priorities: organized communication channels with four-hour turnaround guarantees, relationship reinforcement through periodic business reviews and selective payment options, scheduling reliability through structured schedules, and customer recovery through individual customer outreach. The implementation is aimed at achieving ninety-five percent retention rate, 90 percent on time delivery, and 20 percent growth in revenues in eighteen months. The study adds empirical support showing the impact of dimensions of service quality on buyer decision making in an organization and retention of customers in agricultural supply chains where there is trust in relationships and product differentiation is low.

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