Judul: Modifikasi Formula dan Kemasan untuk Memperpanjang Umur Simpan Kue Lapis Talas
Abstrak: Kue lapis talas merupakan jenis kue yang dikukus yang memiliki umur simpan pendek. Umur simpan kue yang pendek yaitu hanya beberapa hari disebabkan oleh terjadinya pertumbuhan kapang pada permukaan produk. Kemudahan produk menjadi rusak berpengaruh secara ekonomi pada usaha kue lapis talas. Oleh karena itu diperlukan upaya untuk memperpanjang umur simpan kue lapis talas tersebut. Penelitian ini bertujuan untuk memperpanjang umur simpan produk kue lapis talas hingga 9 hari, melalui modifikasi formula dan kemasan. Metode yang dilakukan adalah menerapkan konsep hurdle dengan penambahan kombinasi humektan dan dan bahan tambahan pengawet, serta modifikasi pengemasan kue lapis talas dengan mengisi gas nitrogen serta bahan penyerap oksigen (oxygen absorber) di dalamnya. Hasil penelitian menunjukkan bahwa penerapan modifikasi formula dan kemasan yang dilakukan, secara kenampakan umur simpan kue lapis talas mampu diperpanjang hingga 21 hari. Kombinasi terpilih berupa penambahan gliserol 6%, kalsium propionat 0,075%, dan kalium sorbat 0,0375% pada produk kue lapis talas dengan pengemasan menggunakan plastik berbahan campuran polietilen dan nilon dengan tebal 80 mikron, gas nitrogen serta penyerap oksigen. Secara kenampakan tidak ada kapang yang tumbuh pada permukaan produk serta laju pertumbuhan mikroba yang lebih lambat.
Keyword: formula, hurdle concept, packaging, shelf life, taro layer cake

Judul: Penggunaan Perlakuan Panas untuk Memperpanjang Umur Simpan Produk Lapis Talas Kukus
Abstrak: Bolu lapis talas kukus memiliki umur simpan yang pendek yaitu hanya 2 hari pada suhu ruang dan 5 hari pada suhu kulkas. Kerusakan produk paling utama disebabkan oleh kapang. Cara memperpanjang umur simpan dari produk pangan yang paling sering digunakan yaitu dengan perlakuan panas. Penelitian ini bertujuan memperpanjang umur simpan dari produk bolu lapis talas kukus menggunakan perlakuan panas. Penelitian pendahuluan mendapatkan proses pemanasan menggunakan suhu 105 °C, 110 °C, dan 115 °C dengan waktu 15 menit, 20 menit, dan 25 menit. Pengujian tekstur dan mikroba dilakukan selama penyimpanan pada hari pertama, ketiga, kelima, dan ketujuh. Pengamatan perubahan warna dan ukuran dilakukan setelah proses pemanasan. Hasil menunjukkan bahwa semakin tinggi suhu yang digunakan, nilai hardness dari produk bolu semakin tinggi, dan selama penyimpanan juga nilai hardness semakin tinggi. Nilai springiness dan cohesiveness cenderung menurun setelah pemanasan dan seiring penyimpanan sampel. Berdasarkan data ALT, pemanasan menggunakan suhu 115 °C dapat memperpanjang umur simpan menjadi 7 hari. Perubahan warna akibat pemanasan terjadi semakin tinggi seiring dengan meningkatnya suhu pemanasan. Perubahan warna paling tinggi terjadi pada suhu pemanasan 115 °C selama 20 menit. Proses pemanasan menurunkan ukuran panjang, tebal, dan tinggi dari produk, yang mana pemanasan dengan suhu 115 °C selama 25 menit menyusutkan panjang produk sebesar 5,19%, ketebalan menyusut sebesar 15,25% dan menyusutkan tinggi sebesar 0,71%.
Keyword: taro layer sponge cake, heat treatment, shelf life

Judul: Characterization of Asian Tiger Mosquito (Aedes albopictus) as Potential Vector of Arboviruses in Non-Human Primates Breeding Facilities Environment
Abstrak: Wildlife-originated infectious diseases present a significant threat to global health, security, and economic growth, thus combatting their emergence is a public health priority. Non-human primates (NHPs) frequently act as reservoirs for arboviruses causing diseases in humans. Arboviruses of significant concern in NHPs populations among others are Yellow Fever virus (YFV), Dengue virus (DENV), Zika virus (ZIKV), and Chikungunya virus (CHIKV). The diseases caused by arboviruses usually do not show clinical symptoms but can cause viremia conditions, so the viruses are maintained in nature, include in NHPs’ breeding facilities. The Primate Research Center (PRC) IPB University is a renowned research center that conducts advanced research on Indonesian primate biology. The PRC IPB University activities encompass various aspects, such as compiling biological data banks, characterizing population genetics within the colony and in the wild, and conducting conservation research. PRC IPB University possesses breeding facilities for NHPs located in urban and peri-urban areas close to human settlements. Aedes albopictus is reported as a competent vector of more than 20 arboviruses and a significant vector for important pathogenic arboviruses such as CHIKV, ZIKV, and DENV. The presence of Ae. albopictus in NHPs’ breeding facilities can contribute to the transmission of Aedes-borne viral diseases within and between NHPs, as well as between NHPs and humans, or even among humans themselves. There are not yet any previous report on a comprehensive investigation of Ae. albopictus in Indonesia NHPs’ breeding facilities. The presence of Ae. albopictus in both urban and peri-urban regions, where NHPs' breeding facilities are situated, could potentially serve as a contributing factor in the transmission of Aedes-borne viral diseases between NHPs and humans (and vice versa), as well as among human populations. This research was a comprehensive study regarding Ae. albopictus as a potential arboviruses vector in NHPs’ breeding facilities environments of PRC IPB University. This research consisted of 5 stages as follows (1) biology and life table of the Ae. albopictus populations collected from urban and peri-urban area of NHPs’ breeding facilities under laboratory conditions (2) genetic structure of the Ae. albopictus collected from urban and peri-urban area of NHPs' breeding facilities based on cytochrome oxidase 1 gene (3) Arboviruses circulation and Wolbachia molecular typing of the Ae. albopictus populations collected from urban and peri-urban area of NHPs’ breeding facilities (4) the diversity and composition of gut and larvae microbiota in Ae. albopictus from urban and peri-urban area of NHPs’ breeding facilities (5) characteristic habitat of Ae. albopictus and species distribution model in peri-urban area of NHPs’ breeding facilities. Ae. albopictus biting behavior in urban and peri-urban area NHPs breeding facilities exhibited distinct bimodal activity patterns, with a peak in the morning around 09:00-10:00 and another peak in the evening around 16:00-17:00. Ae. albopictus mosquitoes from urban area demonstrated greater fecundity, longer lifespan, more gonotrophic cycles, and a higher net reproduction rate (R0) than their counterparts from peri-urban area. Cytochrome oxidase 1 sequences with 643 base pairs (bp) length were obtained from Ae. albopictus from both populations. Seven bp of nucleotide variation were found with a nucleotide diversity value was 0.00294. Seven haplotypes were formed
Keyword: Aedes albopictus, arboviruses, infectious disease, medical entomology, non-human primates