Cahaya Ratu I. Email and Phone Number

Weighing and preparing dye materials such as naphthol and indigosol based on predetermined formulas for the batik dyeing process. Successfully managed the preparation of dye materials for large-scale production and ensured the accuracy of processes through routine equipment maintenance and calibration.

- Led and motivated teams to achieve highest sales level in May 2023 with turnover of 100 million.- Monitored and recorded raw material requirements every three days or when materials ran out to ensure quality production.- Maintained high standards to optimize outlet performance and implemented effective training protocols.- Monitored production process from ingredient preparation to final presentation, ensuring cleanliness, safety, and product consistency.- Conducted evaluations and trained new crew members to minimize order errors and ensure customer satisfaction.- Created shift schedules for crew members, ensuring adequate coverage for operational needs.

- Ensured outlet compliance with existing Standard Operating Procedures (SOPs).- Ensured all food served met established quality and cleanliness standards.

- Assisted more than 40 students in the practicum in determining critical micelle concentration (CMC) and solubility as a function of temperature. - Analyze the physical and chemical properties of a material/sample using methods such as titration, spectrophotometry, and determining other physical parameters.- Assisted students in using laboratory tools and instruments in physical chemistry laboratories, such as the furnace, centrifuge, and ultrasonic bath, properly and correctly, evaluating and assessing the performance and report of practitioners. - Analyze and interpret data from the analysis results of various material characterization techniques, including X-ray Diffraction (XRD) patterns, Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS), Fourier Transform Infrared Spectroscopy (FTIR), and Fluorescence. - Collaborated with professors and fellow assistants to conduct research and succeeded in creating an environmental chemistry research journal published in the Diponegoro University E-Journal.

- Assisted more than 35 students in the practicum about ester synthesis using a refluxdevice and assisted students in practicum sessions by providing feedback on the practicum.- Explained the basics of laboratories, procedures, and work safety to students during practicum.- Responsible for the safe storage, handling, and disposal of chemicals under safety and environmental regulations and ensuring that laboratory equipment is well maintained and works fine.

- Conducted quality testing of raw materials, food, and beverage packaging materials using established procedures and methods to determine Heavy Metals such as Pb, Cd, and Hg2+ using an Atomic Absorption Spectrophotometer (AAS), FTIR for molecular and chemical structure identification, as well as UV-VIS for spectrophotometric analysisaccording to BPOM Standard.- Learn the types of plastic for food and the standards for packaging food and eating utensils.