Judul: Aplikasi Iradiasi Gamma (60Co) untuk Mereduksi Senyawa Akrilamida pada Keripik Pisang dan Pengaruhnya terhadap Karakteristik Produk
Abstrak: Acrylamide is classified by the International Agency for Research on Cancer (IARC) as group 2A: probably carcinogenic to humans. It is potentially formed in significant amount when a food product containing sugar and asparagine as acrylamide precursors is processed in high temperature such as frying and baking process. Banana chips are widely consumed in Indonesia and potentially contain acrylamide due to the high temperature processing and acrylamide precursor content. The objective of this research is to reduce acrylamide content in banana chips by using gamma irradiation technique. Five doses of gamma irradiation (0, 5, 10, 15, and 25 kGy) were applied on banana chips. The acrylamide content was analyzed by using commercial ELISA Kit. Results showed that irradiation by 5, 10, 15, and 25 kGy reduced acrylamide content in banana chips from 506.34 ng/g (in control) to 455.99 ng/g, 373.66 ng/g, 294.34 ng/g, and 130.78 ng/g, respectively. These acrylamide reductions were 9.95, 26.20, 41.87, and 74.17% for irradiation doses of 5, 10, 15, and 25 kGy, respectively. Sensory analysis results showed that irradiated banana chips with doses of 0, 5, 10, 15 and 25 kGy had overall value 9.78, 8.77, 8.57, 7.32, and 6.43, respectively indicating there was a decrease of consumer acceptance with the increase of radiation doses. In view of the color properties, gamma irradiation affected significantly the color of banana chips. Irradiated banana chips were darker than non-irradiated banana chips. Objectively, CIE L* and b* values of irradiated banana chips were significantly different (p<0.05) compared to those of control. This study revealed that irradiation with a dose of 10 kGy was the most appropriate method to reduce acrylamide content in banana chips since it did not change significantly in terms of physical and sensory properties.
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Judul: Perlakuan Blansir dan Edible Coating dari Pektin untuk Mereduksi Senyawa Akrilamida pada Proses Penggorengan Keripik Pisang Ambon
Abstrak: Acrylamide is a probable human carcinogen and is potentially formed in ambon banana chips due to its reducing sugar and asparagin content and the involvement of frying process. This research aims to reduce acrylamide formation in ambon banana chips by using blanching and pectin-based edible coating. Blanching treatment was conducted at 90 oC, and 100 oC for 1 minute while concentration of pectin-based edible coating was 0 and 2 % (w/v). Acrylamide level was analyzed by enzyme-linked immunosorbent assay (ELISA) method. Ambon banana chips prepared without blanching and edible coating contains 194.40 ppb of acrylamide. Edible coating reduced 33.02 % of acrylamide level whereas blanching at 90 oC and 100 oC reduced 20.06 % and 52.47% of acrylamide levels, respectively. Interestingly, combination of blanching and pectin-based edible coating could reduce intensively acrylamide level in banana chips until 90% of reduction. However, with only blanching pretreatment, it induced an important change in physical characteristics of products and reduced consumer preference which was indicated by lower hedonic scores compared to those of the control.
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Judul: Implementasi Space Time Composite (STC) Data Model Menggunakan Model Data Relasional
Abstrak: The data model is a concept that describes the data stored in the database and the relationship between the data to the user in logic. Development of data models is very important in the design of the database as the basis of the stage of database design to be made. This study aims to apply the concept of Space Time Composite (STC) on the Model Data storage vector data types that can store enough information and describes the process of drafting objects and objects spatiotemporal evolution over time. From the results of the test queries on the data model that have been created, queries in a system are acquired that can help display the information preparation of objects from time to time and know the history of the object polygon and arc that has undergone changes in topology.
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