Judul: Kombinasi penggunaan edible coating dan kemasan plastik untuk mempertahankan kesegaran tomat cherry selama penyimpanan dingin
Abstrak: Kesegaran merupakan faktor utama yang menentukan nilai jual tomat cherry. Salah satu cara untuk mempertahankan kesegaran tomat cherry adalah menggunakan pelapis yang dikombinasikan dengan penggunaan plastik pengemas. Tujuan dari penelitian ini adalah menentukan kombinasi konsentrasi karagenan sebagai bahan pelapis dan kemasan plastik untuk mempertahankan kesegaran tomat cherry selama penyimpanan dingin. Percobaan menggunakan rancangan acak lengkap faktorial terbagi dengan 3 taraf konsentrasi karagenan (0.5% 1.0%, dan 1.5%) dan 3 taraf jenis kemasan plastik (polietilen, polipropilen, dan stretch film) serta penyimpanan pada suhu 10°C. Uji anova digunakan untuk mengetahui bagaimana pengaruh tiap perlakuan terhadap parameter uji. Parameter yang diukur selama penelitian meliputi laju respirasi, susut bobot, uji warna, kekerasan, total padatan terarut (TPT), dan organoleptik. Hasil analisis statistik menunjukkan bahwa untuk mempertahankan kesegaran buah tomat cherry adalah dengan kombinasi pengunaan karagenan (konsentrasi 0.5%) sebagai bahan pelapis dan kemasan plastik jenis polietilen.
Keyword: Cherry tomatoes, Edible coating, Carrageenan, Plastic packaging, Cold storage, Carrageenan, Cold food technology, Polythheyene, Plastik film, Storage tomato, Food science

Judul: Penggunaan Pelapisan Kitosan dan Penyimpanan Dingin untuk Mempertahankan Mutu Tomat Ceri (Lycopersicum esculentum var. cerasiforme)
Abstrak: Tomat ceri mudah mengalami penurunan mutu selama penyimpanan. Teknologi penanganan pascapanen yang tepat diperlukan guna mempertahankan mutu tomat ceri. Penelitian ini bertujuan mengkaji pengaruh pelapisan kitosan dan suhu penyimpanan terhadap mutu tomat ceri serta menentukan konsentrasi pelapisan kitosan dan suhu penyimpanan yang terbaik untuk mempertahankan mutu tomat ceri. Bahan yang digunakan dalam penelitian ini adalah tomat ceri varietas Fortesta yang diperoleh dari Lima Sukses Utama Farm, Kabupaten Bogor. Pelapisan menggunakan kitosan dengan bahan tambahan berupa akuades dan asam asetat. Tomat ceri dicelupkan pada larutan kitosan dengan konsentrasi 1% dan 2% dan sebagai kontrol adalah tomat ceri tanpa pelapisan. Masing-masing kelompok tomat ceri kemudian disimpan pada suhu 15 °C dan 25 °C. Parameter yang diamati selama penyimpanan adalah laju respirasi, susut bobot, kekerasan, total padatan terlarut, uji organoleptik (kesegaran, warna, dan aroma) pada tomat ceri. Rancangan percobaan yang digunakan adalah rancangan acak lengkap faktorial dengan dua faktor, yaitu pelapisan kitosan (1%, 2%, dan kontrol) dan suhu penyimpanan (15 °C dan 25 °C). Data diolah menggunakan analisis sidik ragam (Anova) dan uji lanjut Duncan. Hasil penelitian menunjukkan bahwa pelapisan kitosan berpengaruh terhadap laju respirasi, susut bobot, kekerasan, total padatan terlarut, dan uji organoleptik. Suhu penyimpanan berpengaruh terhadap laju respirasi, susut bobot, kekerasan, total padatan terlarut, dan uji organoleptik. Pelapisan dengan konsentrasi kitosan 2% dan suhu penyimpanan 15 °C merupakan perlakuan terbaik yang mampu menekan laju respirasi, susut bobot, kekerasan, total padatan terlarut, dan secara organoleptik masih diterima panelis pada hari penyimpanan ke-21. Sedangkan pada kontrol hanya bertahan pada hari penyimpanan ke-15., Cherry tomatoes are prone to quality deterioration during storage. Proper post-harvest handling technology is needed to maintain the quality of cherry tomatoes. This research aims to examine the effect of chitosan coating and storage temperature on the quality of cherry tomatoes and determine the optimal chitosan coating concentration and storage temperature to maintain the quality of cherry tomatoes. The materials used in this research were Fortesta variety cherry tomatoes obtained from Lima Sukses Utama Farm, Bogor Regency. Coating using chitosan with additional materials of distilled water and acetic acid. Cherry tomatoes were dipped in chitosan solution with concentrations of 1% and 2%, and the control was cherry tomatoes without coating. Each group of cherry tomatoes was then stored at temperatures of 15 °C and 25 °C. Parameters observed during storage were respiration rate, weight loss, firmness, total soluble solids, and organoleptic tests (freshness, color, and aroma) of cherry tomatoes. The experimental design used was a factorial completely randomized design with two factors, namely chitosan coating (1%, 2%, and control) and storage temperature (15 °C and 25 °C). Data were analyzed using analysis of variance (Anova) and Duncan's multiple range test. The results showed that chitosan coating affects the respiration rate, weight loss, firmness, total soluble solids, and organoleptic tests. Storage temperature affects respiration rate, weight loss, firmness, total soluble solids, and organoleptic tests. Coating with 2% chitosan concentration and storage temperature of 15 °C were the best treatments that were able to suppress respiration rate, weight loss, firmness, total soluble solids, and were still acceptable organoleptically by panelists on the 21st day of
Keyword: cherry tomatoes, chitosan coating, quality, storage temperature

Judul: Studi sistematika  Oreophryne Boettger, 1895Sulawesi (Anura: Microhylidae)
Abstrak: The cross frogs, genus Oreophryne Boettger, 1895 are most diverse in the mainland of New Guinea and adjacent islands, to the Wallacea region in the Moluccas, Sulawesi, and the Lesser Sunda Islands, even marginally to the Oriental region in Bali and to the southern Philippine Islands. In Sulawesi, this taxon consists of three species but has rarely been reported since their original descriptions and remained unstudied in both taxonomical work and molecular study. This research aims to evaluate the taxonomic status of the cross frogs in Sulawesi based on morphology and estimate the phylogenetic using the 16S rRNA gene. The phylogenetic tree was reconstructed under Maximum Likelihood (ML) and Bayesian Inference (BI) analyses. We used the specimens of Sulawesian Oreophryne which were stored at the Museum Zoologicum Bogoriense (MZB). A total of about 19 morphological characters were measured by a digital caliper and ocular micrometer to the nearest 0.01 mm. The phylogenetic tree shows that the three nominal species of Oreophryne from Sulawesi are clearly clustered. Correspondingly, the phylogenetic analysis supports the recognition of a new taxon, Oreophryne sp. However, the phylogenetic relationships between Oreophryne within Wallacea remain unresolved. Consequently, further systematic analysis along with additional sequences from the type locality is necessary to clarify the interspecific relationship among this region. We examined the morphology of 50 voucher specimens of Sulawesian Oreophryne. The validity of O. celebensis, O. variabilis, and O. zimmeri was confirmed in this study, but still the latter remains to be established. The three nominal species examined here were not collected from the type locality, so additional specimens, either in the type locality, new locations, or in other areas on this island are needed to evaluate the taxonomic status of these species deeply. Moreover, the unnamed species from the highland of the Mekongga mountains differ morphologically and genetically from all previously described Sulawesian Oreophryne. This distinct species will increase the number of cross frogs in Sulawesi to four species, all of which are endemic.
Keyword: frog, morphology, Oreophryne, phylogenetic, Sulawesi, systematics