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: Pendugaan Umur Simpan Tepung Cookies Menggunakan Metode Akselerasi Dengan Pendekatan Kadar Air Kritis
Abstrak: Label pangan adalah salah satu kewajiban yang harus dicantumkan oleh produsen pangan. Hal ini diatur dalam UU Pangan no 18 tahun 2012. Informasi umur simpan ditujukan agar konsumen mendapatkan jaminan mutu dan keamanan dari produk yang dikonsumsi. Tujuan penelitian ini adalah untuk menduga umur simpan tepung cookies yang diproduksi oleh salah satu industri tepung di Bogor. Tepung cookies yang diproduksi merupakan tepung komposit dengan kombinasi bahan utama tepung beras dan tepung sorgum. Metode yang digunakan pada penelitian adalah Accelerated Shelf-life Testing (ASLT) yaitu dengan mengkondisikan lingkungan produk yang dapat mempercepat reaksi penurunan mutu. Pendekatan kadar air kritis digunakan pada penelitian karena kadar air merupakan parameter penting dalam menentukan mutu tepung. Tahapan penelitian meliputi penentuan kadar air awal (Mo), kadar air kritis (Mc), penyimpanan sampel pada berbagai RH untuk mendapatkan kurva ISA, penentuan model sorpsi isotermis, uji ketepatan model, penentuan kemiringan kurva (b), pengukuran variabel umur simpan lainnya, serta pendugaan umur simpan dengan menggunakan persamaan Labuza. Model yang tepat untuk menggambarkan kurva isotermis sorpsi pada tepung cookies adalah model Oswin dengan nilai MRD 0,26. Hasil penelitian menunjukkan bahwa umur simpan tepung cookies dengan pendekatan air kritis berdasarkan Standar Nasional Indonesia (SNI) tepung beras pada RH 71% dengan menggunakan kemasan aluminium foil, LDPE (Low Density Polyethylene), dan plastik PP (Poly Propylene) berturut-turut adalah 324 hari, 30 hari, dan 144 hari dan pada RH 82% adalah 172 hari, 16 hari, dan 77 hari., Food labels are one of the obligations that must be included by food producers. This is regulated in Food Law No 18 of 2012. Shelf life information is intended so that consumers can guarantee the quality and safety of the products they consume. The purpose of this study was to estimate the shelf life of cookies flour produced by a flour industry in Bogor. Cookies flour produced is a composite flour with a combination of rice flour and sorghum flour. The method used in this research is Accelerated Shelf-life Testing (ASLT), namely by conditioning the product environment which can accelerate the reaction of quality degradation. The critical moisture content approach was used in this study because the water content is an important parameter in determining flour quality. The research stages include determining the initial moisture content (Mo), critical water content (Mc), storing samples at various RH to obtain the ISA curve, determining the isotherm sorption model, testing the accuracy of the model, determining the slope of the curve (b), measuring other shelf life variables, and estimation of shelf life which is calculated based on the Labuza equation. The best fit model in describing the moisture sorption isothermic curve in cookies flour was the Oswin model with MRD values 0,26. The results show that the shelf life of cookies flour with a critical water approach based on the Indonesian National Standard (SNI) for rice flour at 71% RH using aluminium foil, LDPE (Low-Density Polyethylene), and PP (Polypropylene) packaging, respectively was 324 days, 30 days, and 144 days and at 82% RH was 172 days, 16 days, and 77 days.
Keyword: cookies flour, critical moisture content, Labuza, 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