Indonesian Journal of Applied Research (IJAR)

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 — 2023-12-07

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.

Perceived Accuracy and User Behavior: Exploring the Impact of AI-Based Air Quality Detection Application (AIKU)

Qurotul Aini — 2023-12-07

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.

Investigation of Original Honey Based on Electrical Impedance

Ronaldo Talapessy — 2023-12-29

Honey comes from nectar extracted by bees and benefits the food industry. However, marketing often involves deception, such as mixing it with sugar. This study aims to distinguish between original honey and honey with adding sugar based on electrical impedance. The study was carried out to measure pure forest honey (Apis dorsata) and honey that was added sugar from 10 g to 60 g, where current 30 mA was applied at 100 Hz – 100 kHz. Additionally, some physicochemical characteristics of honey were measured to compare with the electrical impedance. The result shows that pure honey's impedance is lower than adding sugar. The electrical impedance of pure honey increases with the addition of sugar. Investigation of the electrical impedance on quality of honey preferable applied at the frequency from 100 Hz to 1 kHz.

Antioxidant Activity and Tyrosinase Inhibitor of Red Betel Leaf Extract

Mustika Weni — 2023-12-30

Red betel leaf (Piper Crocatum) contains flavonoids, tannins, steroids, and alkaloids, known to act as antioxidants. This study aimed to determine the antioxidant activity of red betel leaf extract. The solvents used for the extraction process are ethanol and n-hexane. The thiobarbituric acid (TBA) method was used to determine antioxidant activity. The results showed that the extract of 200 ppm inhibited fatty acid oxidation by 52.13%. No significant difference (α = 0.05) inhibition of unsaturated fatty acids oxidation between the sample and α-tocopherol at 200 ppm. The ethanol extract of red betel can inhibit the tyrosinase enzyme higher than the n-hexane extract of red betel, as seen from the IC₅₀ value of the ethanol extract of red betel of 1655 ppm, while the IC₅₀ value of n-hexane of red betel is 3090.56 ppm.

Antibacterial Ingredients That Cause Diarrhea Can Be Made from Black, Green, and White Tea Extract (Camellia sinensis L.)

Akhmad Endang Zainal Hasan — 2023-12-30

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 70^oC, 100^oC, and 121^oC. 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 100^oC. Tea extract temperatures of 100^oC 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.

The Effect of Temperature and Concentration Edible Coating of Aloe Vera Gel (Aloe Vera L.) to The Shelf Life and Sensory of Tomatoes (Solanum lycopersicum L. cv Momotaro)

Oktavianus Lumban Tobing — 2023-12-30

Tomatoes (Solanum lycopersicum L. cv Momotaro) with a creeping growth or indeterminate type generally grown in the highlands have high economic value. Momotaro tomatoes were classified as climacteric fruits that are easily damaged after harvest. So, it is necessary to do low-temperature treatment and edible Aloe vera gel coating to extend shelf life and sensory. This research aims to determine the effect of low-temperature storage and the concentration of aloe vera gel edible coating, which can extend the shelf life and sensory of Momotaro tomatoes. This study used a complete randomized design of the nested pattern, with treatment edible coating aloe vera gel consisting of 3 concentrations, namely control treatment (without coating), concentration coating 50%, concentration coating 100% nested in temperatures 5°C, 10°C, 15°C, and room temperature (27°C). Conclusions from results showed that the temperature treatment of 10°C and the edible coating treatment of aloe vera gel with a concentration of 50% nested at 10°C, have better results in extending the shelf life and sensory of Momotaro tomatoes to more than 30 days because the maturity level of Momotaro tomatoes has not yet reached its chemical peak. The temperature treatment and concentration of aloe vera coating positively contribute to extending the shelf life and sensory of Momotaro tomatoes.