International Journal of Eco-Innovation in Science and Engineering (IJEISE)

Potency of Mangrove Leaves (Rhizophora mucronata) Containing Bioactive Compounds as Source of Antioxidant: A Review

Rahmawati — 2023-11-28

Bioactive compounds derived from plants are gaining attention worldwide because they have beneficial effects on humans. Rhizophora mucronata is a species of mangrove plant that has slightly dark leaves and glossy green on the top of the leaves and pale green on the bottom and acts as a natural antioxidant which has traditionally been used as a food ingredient and traditional medicine. Therefore, this article was written to review the bioactive compounds in Rhizophora mucronata leaves, antioxidant levels and the benefits of antioxidants in food and health products. This article summarizes relevant literature regarding R. mucronata which was tested using Phytochemical screening, FTIR and DPPH (1,1-diphenyl-2-picrylhydrazyl) methods. Phytochemical analysis revealed the presence of alkaloids, flavonoids, steroids, phenolics, tannins and saponins. Based on the FTIR test, R. mucronata leaf extract showed the presence of –OH, C-H (aromatic), C=C (aromatic), and C-O groups. The antioxidant capacity expressed in IC₅₀ (mg/mL) shows that R. mucronata has the potential to be used as a source of natural antioxidants. Antioxidants can play a role in improving the sensory quality of a food product and as a natural bactericidal so that it can be used to maintain aquatic biota and food preservatives. In addition, antioxidants contained in mangroves can prevent aging, wrinkles, cancer, obesity, and diabetes mellitus.

Designing the Distribution Route for 40 Kg Cement Using Ant Colony Optimization Algorithm at PT. SBI Tuban

Rusindiyanto — 2023-11-28

Distribution is a process of distributing goods or services needed from producers or service producers to consumers and to users, wherever and whenever needed. Problems that often occur in the distribution process that are often encountered are constraints on ineffective routes and inadequate fleet carrying capacity, especially in the Tuban and surrounding areas. This study aims to optimize the distribution route using the Ant Colony Optimization algorithm. This method is used to determine the shortest route that can be taken with the help of ants, achieving optimal results in reducing the distance. The conclusion from this research is that the route, namely the total distance traveled for the ant colony algorithm is 163.2 km for one trip. The fleet required for each shipment is 2 trucks with each truck carrying 8 tons and 7.6 tons. And each truck covers a round trip distance of 151.7 km and 61.7 km.

Design of Web-Based Laboratory E-Learning Information System (Case Study in UPN "Veteran" Jawa Timur Industrial Engineering’s Laboratory)

Dwi Sukma Donoriyanto — 2023-11-28

This time, the development of technology has increase rapidly, one example of technology application in education is development the concept of e-learning. However, the Industrial Management and Statistic Laboratory (IMSL) located at UPN “Veteran” Jawa Timur in the Industrial Engineering Department does not have the supporting facilities for practicum learning such as E-Learning. In other words, the learning process between laboratory assistants and practitioners is very limited, and causes a lack of intensity in interaction between laboratory assistants and practitioners. In this research, a web-based E-Learning information system will be produced to provide easiness in practicum learning for people who related to the laboratory, and can be accessed anytime and anywhere. The research method for collecting required data is by observation and interviews. This e-Learning is designed with PHP, HTML, and SQL programming languages. And the supporting software that are Google Chrome, XAMPP, VSCode, and FileZilla. Based on the test results, it is concluded that the web-based IMSL E-Learning information system has provided easy learning to the practitioners and people who involved in the laboratory. While laboratory assistants can send announcements about practicum information and practitioners can do the revisions or acc reports to certain laboratory assistants systematically and online.

Control of Corrosion Rate of Metal Alloys: SS 304 And SS 201 Using Phosphate Inhibitor in Nacl 3.5%

AR Yelvia Sunarti — 2023-11-28

Corrosion is metal damage caused by electrochemical reactions with its environment. This environment can be water, air, gas, acid solution, salt solution, and others. Metals are highly active in producing an oxide layer on the metal surface under the influence of an aerobic environment. Metal corrosion is a process where the action of the surrounding media damages metal materials by the introduction of corrosion ions. This study aims to determine the best conditions for phosphate in controlling the rate of corrosion and Knowing the inhibition of phosphate on controlling the rate of corrosion. The materials used were stainless steel 201, stainless steel 304, and phosphate as an inhibitor. Meanwhile the solution NaCl 3.5% as a corrosive media environment and distilled water. Based on this research, the best phosphate concentration in reducing the corrosion rate of stainless steel 201 and 304 is 100 ppm with a reduction in the corrosion rate of stainless steel 201 of 0.022312 mpy with an inhibition percentage of 89.68%, and a reduction in the corrosion rate of stainless steel 304 by 0.045694 mpy with the percentage of inhibition is 94.027%. The corrosion rate of 304 stainless steel is lower than that of 201 stainless steel caused by differences in the Cr element composition of each metal. Stainless steel 304 contains 18.24% Cr while stainless steel 201 contains 13.00% Cr. The lower the Cr content in stainless steel, the stainless steel will be more susceptible to corrosion.

Mass Transfer Coefficient Study of Cherry (Muntingia calabura L.) Leaves Alkaloids Extraction Using Ethanol

Kindriari Nurma Wahyusi — 2023-11-28

Cherry (Muntingia calabura L.) leaves have been acknowledged for their potential as a rich source of various components including alkaloid, flavonoid, tannin, saponin, triterpenes, and polyphenol. Alkaloids play diverse roles in medical science. Isolated alkaloids from plants are already widely used in traditional medicine. Obtaining alkaloids from the leaves required an extraction process using organic solvent. This study aimed to evaluate the mass transfer coefficient for the extraction of alkaloids from cherry leaves using ethanol as a solvent. Dried cherry leaves were contacted with 96% ethanol at different temperatures and contact times. The extraction temperature ranged from 60, 65, 70, 75, and 80^oC while the contact time varied from 30, 60, 90, 120, and 150 minutes. The extraction process was conducted with a mixing speed of 440 rpm. With the increasing contact time and extraction temperature, there was a corresponding increase in alkaloid concentrations. The optimal extraction conditions were achieved at 75^oC with an extraction time of 150 minutes, resulting in an alkaloid content of 0.6486 gr/ml. The mass transfer coefficient under these extraction process conditions was 1.7923 hour^-1. These data are crucial for the design and scale-up of extractors to achieve optimal results.