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EFFECT OF AIR COOLING AND VACUUM COOLING STORAGE ON PROXIMATE CONTENT (WATER, pH, PROTEIN AND SUGAR) AND β-CAROTENE OF KABOCHA YELLOW PUMPKIN (Cucurbita maxima L.) Triana Kusumaningsih; Tri Martini; Lestari Okstafiyanti; Kartika Setia Rini
ALCHEMY Jurnal Penelitian Kimia Vol 13, No 2 (2017): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.13.2.4320.166-175

Abstract

ABSTRACTThe aim of the research is to determine the effective storage technique between the air cooling and vacuum cooling technique during storage process (0, 4, 8 and 12 weeks) and to increase the shelf life of kabocha pumpkin. Parameters measured during storage process were β-carotene and proximate content (water, pH, protein and sugar). β-carotene content was analyzed by Spectrophotometer UV-VIS followed by validation method, water content by Gravimetric method, pH by pH meter, protein by Makro Kjehldal method, and sugar by Luff Schrool method.  The validation method showed good result which is proved by linearity, accuracy, precission, LOD, LOQ, and recovery values were 0.988, 98.8%, 3.39-7.73%, 0.011 ppm, 0.016 ppm, and 112% respectively. During storage process, β-carotene content was greater decreased on air cooling storage. For proximate content showed that water content was greater decreased on vacuum cooling storage. pH and the protein content was decreased on  air cooling or vacuum cooling storage, but on air cooling was greater. Sugar content was increased during eight weeks and decreased on last week. From the result it can be seen that vacuum cooling storage was better technique for kabocha pumpkin. Keyword: β-carotene, air cooling, proximate, vacuum cooling 
Karakterisasi, Aplikasi, dan Bioaktivitas Edible Film Kitosan dengan Bahan Aktif Minyak Atsiri Sabella Vegasty; Triana Kusumaningsih; Maulidan Firdaus; Annisa Istiqomah
ALCHEMY Jurnal Penelitian Kimia Vol 21, No 1 (2025): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.21.1.86140.1-16

Abstract

Penelitian terkait edible film kitosan telah banyak dikembangkan selama beberapa tahun terakhir. Edible film kitosan merupakan alternatif kemasan pangan yang ramah lingkungan. Kitosan dapat membentuk ikatan intermolekul dengan pati, yang membantu memperbaiki struktur dan sifat fisik film, meningkatkan kilap, transparansi, aktivitas antibakteri, dan mengurangi tingkat kebasahan campuran pelapis. Kombinasi biofilm kitosan-pati singkong merupakan kandidat kuat untuk pelapis dan pengemasan pangan. Campuran keduanya masih bersifat hidrofilik sehingga stabilitas mekanis, ketahanan air, dan perlindungan kelembaban masih jauh dari standar ideal. Penambahan minyak atsiri dapat meningkatkan kekuatan tarik, perpanjangan, dan memperkuat matriks polimer antara kitosan-pati juga berpotensi meningkatkan bioaktivitas dalam edible film. Kajian ini difokuskan pada (1) Pengaruh kombinasi minyak atsiri terhadap karakteristik fisik, kimia, termal, dan mekanik edible film kitosan/pati dan (2) Pembahasan bioaktivitas edible film kitosan/pati/minyak atsiri terhadap berbagai mikroorganisme dalam pangan (3) Aplikasi edible film kitosan/pati/minyak atsiri pada produk pangan.Characterization, Application, and Bioactivity of Edible Chitosan/Starch Film with Essential Oil Active Ingredients. Research related to chitosan edible film has been widely developed over the past few years. Chitosan edible film is an environmentally friendly alternative to food packaging. Chitosan can form intermolecular bonds with starch, which helps improve the structure and physical properties of the film, increases gloss, transparency, antibacterial activity, and reduces the wetness of the coating mixture. The combination of chitosan-cassava starch biofilm is a strong candidate for food coating and packaging. The mix of both is still hydrophilic, so the mechanical stability, water resistance, and moisture protection are still far from ideal standards. The addition of essential oils can increase tensile strength, elongation and strengthen the polymer matrix between chitosan-starch, which also has the potential to increase bioactivity in edible films. This review focuses on (1) The effect of essential oil combination on the physical, chemical, thermal, and mechanical characteristics of chitosan/starch edible films and (2) Discussion of the bioactivity of chitosan/starch/essential oil edible films on various microorganisms in food (3) Application of edible chitosan/starch/essential oil films on food products.