Verifikasi penentuan kadar unsur-unsur kelumit esensial dalam bahan makanan dengan analisis pengaktifan neutron

ABSTRACT A research has been conducted to determine the essential trace elements (Mn, Cr, Fe and Zn) which is contained in potatoes (Solanum tuberosum Sp.) and peanuts (Arachis hypogeae Sp.) using Neutron Activation Analysis (NAA) method. For the purpose of verification of the determination results, a curve fitting analysis of the gamma spectrum peaks of those elements has been done. The netto peak area ratios of PCA Nucleus to curve-fitting results were between 0,08% and 5,59%. Meanwhile the element concentration ratios of PCA Nucleus computation to curve-fitting results were between 0,12% and 22,09%

Pengaruh panas terhadap blok semen hasil pemadatan limbah chrom dan stronsium yang diperkuat dengan fiber alami

Cementation of hazardous liquid waste is one of the methods to minimize its detrimental effect on the environmental quality and human health. This research purpose was to study the effect of temperature on the cement block reinforced by coconut (Cocos nucifera) fiber and bamboo (Bambusa vulgaris) fiber. This research was pursued by adsorbing stronsium waste and chrom using zeolite. 13% v/o of zeolite was mixed with 0,3 of water/cement ratio and 0,5% v/o of natural fiber. The cement blocks produced were heated at 27°C. 50°C, 100°C, 150°C, 200°C and 250°C for 10 minutes and then investigated their compressive strength and leaching rate. The hydration reaction completely works when cement block is heated until certain temperature that results in the increasing of its compressive strength. Over heated results in the decreasing of compressive strength due to the enlarging of pores between cement matrix and fiber. However, the compressive strength of cement block heated up to 250°C is still beyond the standard Based on its compressive strength, the bamboo (Bambusa vulgaris) fiber is more feasible than coconut (Cocos nucifera) fiber for reinforcing cement block Heating just influences on the physics properties of cement block But, the ability of block cement to immobilize a matter is affected by properties of matters

PENGARUH RADIASI MESIN BERKAS ELEKTRON PADA PENGURANGAN KONSENTRASI ZAT WARNA LIMBAH BATIK

This research was done to analyze the effect of radiation dose of electron beam radiation to the concentration reduction of naphtol soga dyes waste which result from process coloration of batik cloth pH = 5,5. Irradiation had been done to napthol soga waste which result from process coloration in Plentong batik industry, at various initial pH 3, 5, 7, 9, 11 and various radiation dose 15, 25, and 35 kGy. The changes of concentration were analyzed by Hitachi U-2000 spectrophotometer UV-Vis, which measured UV-Vis absorption by waste solution at 319 nm and 382 nm wavelength and HPLC was used to get degradation product of radiation. The results showed that on radiation dose range 15 kGy to 35 kGy, the higher radiation dose absorbed by naphtol soga waste solution, the higher reduction of naphtol soga waste concentration. One of radiolysis products of naphtol soga waste solution was oxalate acid with concentration 0,017 % to 0,020 % on radiation dose range 15 kGy to 35 kGy. The higher radiation dose, the lower BOD and COD contents of naphtol saga waste solution. The optimum radiation dose was 35 kGy which reduced of naphtol saga waste solution concentration (91,25±2,24) % at pH 7, reduced BOD content 63% and COD content 52%

Developing Nuclear Security Capacity of Indonesia’s Police and Security Officer: Lessons from Universitas Gadjah Mada’s Pilot Training

Due to an increase in global nuclear security issues, there need to be improvements in human resources and security measures. The Republic of Indonesia is an archipelago country, which makes surveilling for nuclear security threats complicated. Recent radioactive material smuggling incidents proved that Indonesian police and security officers’ knowledge in nuclear security has been challenged and must be improved. In response, Universitas Gadjah Mada’s Nuclear Engineering Program composed a three-day pilot training program for local police and UGM\u27s security officers in 2018. The objective of the training was to improve their capabilities in dealing with nuclear security issues around where they work and serve. Training materials were designed to introduce nuclear technology and provide the basic skills of handling nuclear security matters. The training was divided into 12 sessions, based on the needs stated by the Special Region of Yogyakarta\u27s police chief. Lessons were delivered through traditional teaching, table-top exercises, exercises, and discussion. Fifteen-question pre-tests and post-tests were conducted to assess the officers’ knowledge of the training materials and the benefits of being trained. Based on the tests, we concluded that the participants’ understanding of nuclear security had improved. This increase in understanding was because the training materials fit their job needs, presented in various methods, and the participants’ awareness grew. It led to an increase in their awareness for securing the facilities utilizing radioactive sources in the Yogyakarta area. They said that the number of trainees in this event still does not meet the number of facilities that have to be secured. Therefore, the training should be carried out again and can be improved based on the participants\u27 feedback. Furthermore, this training could be expanded and applied to the whole country

PENGARUH PANAS TERHADAP METODE SEMENTASI LIMBAH BAHAN BERACUN DAN BERBAHAYA YANG DIPERKUAT DENGAN FIBER ALAMI

Masalah pencemaran lingkungan yang diakibatkan oleh adanya peningkatan kegiatan industri telah menjadi perhatian masyarakat, khususnya adanya bahan beracun dan berbahaya dalam limbah cair industri. Limbah tersebut dapat mengakibatkan penurunan kualitas lingkungan yang akhirnya berdampak pada kesehatan manusia. Untuk meminimalisir pencemaran dari limbah cair, salah satu metode yang dapat dilakukan adalah dengan memadatkannya. Penelitian ini bertujuan untuk mengetahui kemampuan dari padatan hasil sementasi limbah bahan beracun dan berbahaya yang diperkuat dengan fiber lokal alami untuk menahan panas. Fiber yang digunakan berasal dari sabut kelapa (Cocos nucifera) dan batang bambu (Bambusa vulgaris). Penelitian dilakukan dengan menjerap limbah yang mengandung stronsium dan chrom dengan zeolit. Zeolit tersebut kemudian dicampur dengan semen dan fiber alami dengan komposisi rasio air/semen 0,3 serta 13% v/o zeolit dan 0,5% v/o fiber alami. Blok semen yang dihasilkan dipanaskan selama 10 menit. Pemanasan dilakukan pada suhu 00C, 500C, 1000C, 1500C, 2000C dan 2500C. Blok semen tersebut kemudian dilakukan uji tekan dan uji lindi. Pemanasan blok semen sampai pada suhu tertentu mengakibatkan reaksi hidrasi berjalan sempurna, sehingga kekuatan tekannya semakin besar. Pemanasan selanjutnya mengakibatkan munculnya rongga yang menyebabkan menurunnya kekuatan tekan. Meskipun demikian sampai dengan suhu 2500C, blok semen masih mempunyai kuat tekan di atas syarat minimal. Ditinjau dari aspek fisik, maka serat dari bambu (Bambusa vulgaris) lebih layak digunakan sebagai penguat daripada serat dari serabut kelapa sabut kelapa (Cocos nucifera). Pemanasan hanya berpengaruh terhadap sifat fisik blok semen, namun tidak mempengaruhi kekuatan penjerapan dan pengungkungan suatu unsur. Kemampuan blok semen yang diperkuat dengan fiber alami untuk mengungkung unsur-unsur yang berbeda dipengaruhi oleh sifat-sifat dari unsur-unsur tersebut

Proceedings of the 3rd International Conference on Community Engagement and Education for Sustainable Development

This proceeding contains articles on the various ideas of the academic community presented at The 3rd International Conference on Community Engagement and Education for Sustainable Development (ICCEESD 2022) organized by the Universitas Gadjah Mada, Indonesia on 7th-8th December 2022.  ICCEESD is a biannual forum for sharing, benchmarking, and discussing HEI’s activities in developing Education for Sustainable Development towards community engagement. Education for Sustainability as a teaching strategy for resolving community challenges through formal, informal, or non-formal education is expected to benefit from various community service best practices by academics, researchers, and students. The 3rd ICCEESD has “Strengthening Education for Sustainability Towards Better Community Engagement” as its theme this year. It is expected that the 3rd ICCEESD will provide a forum for the presenters and participants to exchange best practices, policies, and conceptual implementation of Education for Sustainability towards better community engagement and explore ideas to address community needs.  Conference Title: 3rd International Conference on Community Engagement and Education for Sustainable DevelopmentConference Theme: Strengthening Education for Sustainability Towards Better Community EngagementConference Acronyms: ICCEESD 2022Conference Date: 7th-8th December 2022Conference Location: Grand Rohan Jogja Yogyakarta, IndonesiaConference Organizer: Universitas Gadjah Mada, Indonesi