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INDONESIA
Indonesian Journal of Applied Research (IJAR)
Published by Universitas Djuanda Bogor
ISSN : -     EISSN : 27226395     DOI : https://doi.org/10.30997/ijar.v1i3
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT
Indonesian Journal of Applied Research (IJAR), e-ISSN 2722-6395 is high quality open access peer reviewed research journal that is published by Universitas Djuanda (UNIDA). IJAR dedicated to publish significant research findings in the field of Applied Sciences, Engineering &Technology. We welcome original empirical research articles with novel perspectives and/or methodological approaches that would appeal to an international readership. We do not accept unsolicited conceptual and theoretical papers. The journal is designed to serve researchers, developers, professionals, graduate students and others interested in state-of-the art research activities in Applied Sciences, which covers four (2) majors areas of research that includes Applied Sciences, Engineering &Technology. The journal was first published in April 2020 and published every April, August and December.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 90 Documents
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Development of Excel-Based Building Defect Management System Using Business Process Reengineering in Education Building Abdi Telaga; Thyana Avianto; Andreadie Wicaksono; Hadi Susanto
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 2 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i2.292

Abstract

Effective maintenance of a university campus building is crucial to ensure the safety and well-being of its academic community. However, maintaining the building and its various equipment and assets can take time and effort. This study aims to optimize building maintenance by implementing Business Process Reengineering (BPR) and using an Excel-based application system to detect points of damage. The study analyzes the maintenance process's cost, duration, and damage reports using dashboard features such as Gantt chart diagrams. By comparing the Excel-based application system with the conventional system, we found that the former is more effective and efficient. The results show that the application system saves 12 hours of recapitulation time per week, increases labor productivity by 32.2%, and speeds up damage reparation by 5%.
Clusterization of Red Betel Leaves (Piper Crocatum) from Various Regions in Indonesia Based on Secondary Metabolite Fingerprint Analysis and Cytotoxicity Values Eka Wahyu Purnama; Mega Safithri; Dimas Andrianto
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 2 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i2.293

Abstract

The quality of the ethanol extract of red betel leaves as a medicinal plant is determined by secondary metabolites, which are influenced by geographical conditions and the plant growing environment. This study aims to classify red betel from various regions in Indonesia based on secondary metabolite fingerprint analysis and cytotoxicity values. Observation of the diversity of secondary metabolites of the ethanol extract of red betel leaves from seven different regions (Banda Aceh, Bandung, Bogor, Malang, Samarinda, Kendari, Jayapura) was carried out using a metabolomics approach using liquid chromatography-mass spectroscopy (LC-MS/MS) and determining cytotoxicity value using the Brine Shrimp Lethality Test (BSLT) method. Secondary metabolite fingerprinting analysis using cluster analysis with dendrogram yielded 12 compounds with 3 sample groups based on their region of origin, namely group 1 (Banda Aceh, Samarinda, Jayapura); group 2 (Bandung, Kendari, Malang); group 3 (Bogor). Group 1 samples identified eight compounds that had the highest relative abundance values. Group 2 samples identified 3 compounds that have the highest relative abundance values. Group 3 samples had 1 compound with the highest relative abundance value. Each compound has a different retention time. The cytotoxicity value (LC50) of the ethanol extract of betel leaves was obtained from the Banda Aceh and Malang areas (2.64 µg/mL). The conclusions of this study based on the results of secondary metabolite fingerprinting analysis and cytotoxicity values ​​identified 12 compounds with three clusters of secondary metabolite diversity based on their region of origin, namely group 1 (Banda Aceh, Jayapura, Samarinda); group 2 (Bandung et al.); group 3 (Bogor).
Impact Properties of Hemp Natural – Glass Fibers Hybrid Polypropylene Sandwich Composites Lies Banowati; I Putu Udawan Pertama
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 2 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i2.299

Abstract

One way to improve the mechanical properties of composite structures is by hybridizing natural and synthetic fibers. Besides that, combined with sandwich structure composites consists of two relatively strong, thin, and stiff faces separated by a core, for example, balsa, foam, and honeycomb, a relatively thick lightweight. This research develops sandwich composites for structures that have able to withstand high loads and modulus-to-weight ratios but can absorb impacts through impact tests by utilizing the raw material of jute natural fiber, which is abundant in Indonesia so that this research study can predict the effect of variations in the hybridization of hemp natural fiber and the combination of hemp natural fiber with e-glass using polypropylene core sandwich composites by using hand lay-up and vacuum bagging methods. The current impact test results show that the hemp natural-e-glass fibers hybrid sandwich composites get a higher impact strength with a value of 0,019 J/mm² than the hemp-PP honeycomb hybrid sandwich composite with a value of 0,013 J/mm². It shows that by combining e-glass fiber in the composite, it can increase its impact strength and can be a lightweight structural material as being a new alternative material of jute and e-glass natural fiber hybrid sandwich composites with polypropylene cores to substitute conventional materials such as metals which is potential for applications in the automotive, building, and unmanned aerial vehicle industries.
Sensory and Chemical Characteristics of Solid Brem with The Addition of Gedong Gincu Mango Juice (Mangifera Indica L. Var. Gedong Gincu) Lisa Ainurohmah; Rosy Hutami; Nusyawal Nacing
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 2 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i2.301

Abstract

Brem is a type of advanced processed food from fermented white glutinous rice. This study aims to determine the characteristics of solid brem with the addition of Gedong Gincu mango juice. This research uses a one-factor, completely randomized design (CRD) with three levels of treatment with a comparison of white sticky tape juice and Gedong Gincu mango juice, namely A1 (85%:15%), A2 (75%:25%), and A3 (65%:35%). As well as testing paired T-tests for selected products and control. The data analysis used is ANOVA with Duncan advanced test (α=0,05). Based on the results of research solid brem addition of Gedong Gincu mango juice affects the sensory quality (color (3,53-8,44), flavor (5,61-6,79), and appearance (5,44-7,85)), hedonic (color (4,97-7,29), aroma (6,04-7,30), texture (6,34-7,79), and overall (6,41-7,53)), and chemical (water content (18,31%-20,71%), carbohydrates as starch (2,63%-9,17%), acidity (9,51%-17,85%), and vitamin C (2,25 mg/100g-3,02 mg/100g)). However, the addition of Gedong Gincu mango juice did not affect the sensory quality (aroma (5,92-6,45), taste (6,77-7,60), and texture (7,41-7,75)), hedonic (taste (6,34-7,16)), and chemical (ash content (1,45%-4,06%), and water-insoluble part (3,61%-4,15%)). Further test results T-test sample A1 and control showed parameters of color, aroma, and appearance (sensory quality); color, aroma, and taste (hedonic); and the value of water content, ash content, carbohydrates, acid degrees, and vitamin C has no significant effect with the addition of Gedong Gincu mango juice. In contrast, the parameters of taste, flavor, texture (sensory quality), texture and overall (hedonic), and water-insoluble part significantly affect the addition of Gedong Gincu mango juice
Riparian Trees and Its Roles to Water Quality in Niukbaun Springs Chatarina Gradict Semiun; Yulita Iryani Mamulak; Emilianus Pani; Stefanus Stanis
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 2 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i2.307

Abstract

Riparian trees play an essential role in maintaining the quality of the springs. This research was conducted to determine riparian tree types and water quality in Niukbaun Springs, Kupang district. Tree samples were measured by using the Quadrat Sampling Technique. Meanwhile, water quality measurement included physical, chemical, and microbiological parameters. All data collected were analyzed to determine the Shannon-Wiener diversity index, tree endemism status, and gap analysis (conformance of water quality profiles with water quality standards). The results revealed that there were 11 families consisting of Anacardiaceae, Arecaceae, Bombacaceae, Dendrocnide, Elaeocarpaceae, Euphorbiaceae, Meliaceae, Moraceae, Oxalidaceae, Sapindaceae, and Verbenaceae with a total of 149 individuals. The endemism status of the 15 tree species found was 80% classified as endemic and 20% classified as exotic. From the results of the physical and chemical quality tests of water, it was found that almost all parameters met the water quality standards, except for nickel (dissolved metal), which did not meet the water quality standards. Microbiological test results revealed a type of bacteria with similar characteristics to the bacteria Proteus mirabilis, Klebsiella aerogenes, and E. coli. Human activities impact the diversity of riparian trees and the quality of water in Niukbaun Springs.
The Effect of Concentration and Frequency of Neem Leaf Extract on Aphid Attacks on Chili Plants Oktavianus Lumban Tobing; Yanyan Mulyaningsih; Amida Dwi Safitri
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 2 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i2.329

Abstract

Aphids that attack red pepper plants cause yield loss. Applying neem leaf extract in the form of concentration and frequency of yield losses can be avoided. Neem leaf extract contains secondary metabolite compounds that can function as vegetable insecticides to suppress the level of aphid attacks on chili plants. Saponins, meliantriol, and azadirachtin have been known as active ingredients that act as insecticides with different mechanisms of action against aphids, such as saponins as stomach poisons and contact poisons, meliantriol as a repellent (repellent/repellent), and azadirachtin as an inhibitor of ecdysone hormones (hormones that play a role in the process of metamorphosis or molting or exoskeleton of aphids). The study aimed to determine the effect of concentration and frequency of neem leaf extract on the incidence and severity of chili aphid attacks as well as plant development. The proposed solution to overcome aphid attacks is administering neem leaf extract to red chili plants. The method uses a randomized trial design of factorial groups with two factors. The first factor is the concentration of neem leaf extract which consists of four levels, namely: S0 = 0% (100 ml of water or without neem leaf extract), S1 = 10% (10 ml of neem leaf extract + 90 ml of water), S2 = 30% (30 ml of neem leaf extract + 70 ml of water), and S3 = 50% (50 ml of neem leaf extract + 50 ml of water). The second factor is the frequency of giving neem leaf extract, which consists of four levels: M1 = age 8 HSPT, M2 = age 16 HSPT, M3 = age 24 HSPT, and M4 = age 32 HSPT. The findings of this study are that the frequency of giving neem leaf extract three times showed a real effect on the severity of aphid attacks at the age of 44 days after transplanting, and giving a 10% extract had a real effect on height, leaf area, number of flowers, header dry bobobt, and dry weight of chili plant roots. The results of this study conclude that the administration of neem leaf extract can suppress the severity of the attack of red chili plant aphids.
Performance and Relationship of Various Local Garlic Genotypes and Putative Mutants Resulting from MV4 Irradiation Using Morphological Marker Yusup Bahrul Ulum; Diny Dinarti; Sudarsono
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 2 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i2.357

Abstract

Garlic (Allium sativum L.) is used as a medicinal plant or seasoning, but its national production can only meet people's needs by 6.4%, and 95% is imported from China. The development rate of new garlic varieties is relatively slow because garlic is generally propagated vegetatively through cloves; therefore, its diversity has become relatively narrow. Character and diversity can be improved by inducing mutations using gamma-ray irradiation. Experiments on garlic subjected to gamma-ray irradiation have shown physiological changes in the putative 3rd (MV3) mutant offspring. The experiment's 4th mutant progeny (MV4) was re-planted and compared with other local genotypes. The aim was to perform clustering based on the yielding characteristics and the intensity of the anthocyanin content. The experiment used a single-plant design with 21 experimental units, namely 16 MV4 genotypes and 5 control genotypes. The analysis of variance showed that the MV4 Lumbu Kuning 1 Gy and Ciwidey 2 Gy genotypes had better tuber weight and diameter than the other genotypes, including the control genotypes. Cluster analysis clustered garlic genotypes into five groups at a cophenetic distance 0.4. Principal component analysis (PCA) also divided the garlic genotypes into four quadrants. Genotypes in quadrant 2 had anthocyanin content intensities superior to those of other genotypes.
Antibacterial Ingredients That Cause Diarrhea Can Be Made from Black, Green, and White Tea Extract (Camellia sinensis L.) Dadan Rohdiana; Akhmad Endang Zainal Hasan; Dimas Andrianto; Dadan Rohdiana; Heddy Julistiono; Muhamad Alvin Adriyan
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 3 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i3.353

Abstract

One cause of diarrhea is a bacterial infection. Tea (Camellia sinensis) is a steeping drink that has the efficacy of treating diarrhea. This looks at goals to decide the effect of formulations of three tea extracts that act as antibacterial causes of diarrhea and decide the most appropriate maceration temperature. Extraction was carried out with water solvents at temperatures 70oC, 100oC, and 121oC. The disc method conducted an antibacterial test against E. coli and S. aureus. The most optimal temperature for producing the highest inhibitory zone is the temperature of 100oC. Tea extract temperatures of 100oC are used for antibacterial testing. BSLT test showed the LC50 value of 1800 µg/mL. Tests on E. coli bacteria showed the highest results in a single white tea extract with a diameter of 9.750 mm, and tests on S. aureus showed the highest results in the three tea extract formula with a diameter of 9.65 mm. The inhibitory area evaluation of the system changed into finished using the simplex-centroid design method. It showed a non-huge linear model in the antibacterial test in opposition to E. coli and S. aureus.
Perceived Accuracy and User Behavior: Exploring the Impact of AI-Based Air Quality Detection Application (AIKU) Qurotul Aini; Irwan Sembiring; Adi Setiawan; Iwan Setiawan; Untung Rahardja
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 3 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i3.356

Abstract

The accuracy of air quality detection is a crucial aspect influencing user trust and satisfaction with artificial intelligence (AI) based air quality detection applications. However, only a few studies have tested the effect of the accuracy of AI-based quality detection on users' acceptance and use of these applications. This study aims to fill this gap by addressing the impact of perceived accuracy on behavioral intention and behavior using the AIKU application. This research uses a quantitative approach with the online survey method, distributed in January 2023 - February 2023 to AIKU users. Valid data were 287 respondents from 317 who were received and analyzed using partial least squares structural equation modeling (PLS-SEM). This study uses a modified technology acceptance (TAM) model by adding perceived intelligence as a mediating variable between perceived accuracy and usefulness. The results showed that nine hypotheses were accepted from the 13 hypotheses proposed. The results section of hypothesis testing shows that the effect of perceived AIKU application accuracy on perceived usability and ease of use is insignificant. However, these influences indirectly affect the behavioral intentions and attitudes of users. Even if users do not perceive purity as an essential factor, the user's attitude towards the application is still positive. This study makes a theoretical contribution by developing the TAM model by incorporating variables of perceived accuracy and perceived intelligence relevant to the AI-based context.
Stimulatory Effect of Indole – 3 – Butyric Acid and Rooting Media on Adventitious Rooting in Epipremnum Aureum ‘Marble Queen’ Stem Cuttings Attanayake R.M.T.D; Dasanayaka Y.M.H.M.H; Dilshan H.K.L; Hettiarachchi W.A.B.H; Sandarenu K.M.S.D; Gamage S.N.W; Wickramasinghe P.A.S.C; Dayarathna C.R; Kumarihami H.M.P.C
Indonesian Journal of Applied Research (IJAR) Vol. 4 No. 3 (2023): Indonesian Journal of Applied Research (IJAR)
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/ijar.v4i3.360

Abstract

Epipremnum aureum 'Marble Queen' has high demand in the floriculture industry and is propagated commercially using single nodal stem cuttings. In the floriculture industry, they are exported as rooted and unrooted cuttings. Two experiments were conducted to determine the rooting performance of 'Marble Queen' cuttings for both rooted and unrooted export purposes. Experiment one tested the rooting performances of unrooted cuttings after an export simulation (48-hour cold storage at 21°C). In experiment two, the effect of rooting media and IBA was evaluated to produce rooted cuttings. Two different rooting media (coir dust and oasis) and four different concentrations of IBA (0 mg·L-1, 250 mg·L-1, 500 mg·L-1, and 1000 mg·L-1) were tested. Rooting media showed the most significant effects on the rooting of 'Marble Queen' cuttings. Coir dust medium reported the highest number of roots per cutting, root-to-shoot ratio, and average root diameter. Minimum days to bud and root initiation and a higher number of leaf buds were observed in the oasis medium. Early rooting and a higher number of roots were observed with the application of 500 mg·L-1 IBA. The use of an appropriate rooting medium and optimum concentration of IBA would help in the rapid propagation of 'Marble Queen' cuttings. Applying 500 mg·L-1 IBA in the oasis medium was more efficient in early rooting and shoot growth of 'Marble Queen' cuttings. Coir dust medium, along with 500 mg·L-1 IBA, was most suitable for the efficient growth and development of 'Marble Queen' cuttings.

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