This study was aimed to (1) formulate o/w microemulsion using different surfactant oil ratio, (2) determine the microemulsions stability toward centrifugation, heating and storage at room temperature, and (3) characterize microemulsions which were shown the best stability. Microemulsions were prepared using ternary food grade surfactantwith low HLB (span 80), medium HLB (span 20 or span 40) and high HLB (tween 80), and surfactant oil ratio 2,3,4 and 5. VCO and palm oil were used as oil phase, whereas 10 μM phosphate buffer pH 7 was used as aqueous phase. O/W microemulsionwere formed at surfactant oil ratio 3 or more for VCO and at higher surfactant oil ratio (i.e 4 or 5) when palm oil was used as oil phase. Microemulsions with VCO as oil phase which were stable toward centrifugation, heating treatment and storage at room temperature i.e. microemulsions with surfactant oil ratio 4 or 5, while the use of palm oil as oil phase produce stable microemulsions at surfactant oil ratio 4. Microemulsions with surfactant oil ratio 4 showedthe best stability. This microemulsions have a monomodal particle size distribution, the mean particle diameter and viscosity reached 21.7 ± 0.02nm and 6.0 ± 0.10cp (VCO), 22.9 ± 0.15nm and 6.2 ± 0.05cp (palm oil).Keywords: Microemulsion, formulation, stability, surfactant, oil ABSTRAKPenelitian ini bertujuan untuk (1) formulasi mikroemulsi o/w dengan variasirasio surfaktan-minyak, (2) menentukan stabilitas mikroemulsiterhadap sentrifugasi, pemanasan dan penyimpanan suhu ruang, dan (3) karakterisasi mikroemulsi dengan stabilitas terbaik. Mikroemulsi dibuat menggunakan campuran tiga surfaktan food grade yaitu surfaktan HLB rendah (span 80), sedang (span 20 atau span 40), dan tinggi (tween 80), dengan rasio surfaktan minyak 2, 3, 4 dan 5. VCOdan minyak kelapa sawit digunakan sebagai fase minyak, 10 μM bufer fosfat pH 7 sebagai fase aqueous. Mikroemulsi o/w terbentuk pada rasio surfaktan minyak 3 atau lebih untuk penggunaan VCO dan pada rasio surfaktan minyak yang lebih tinggi (yaitu 4 atau 5) untuk penggunaan minyak sawit sebagai fase minyak. Mikroemulsi dengan fase minyakVCO yang stabil terhadap sentrifugasi, pemanasan maupun penyimpanan suhu ruang adalah mikroemulsi dengan rasio surfaktan-minyak 4 atau 5, sedangkan penggunaan minyak sawit sebagai fase minyak menghasilkan mikroemulsi yang stabil pada rasio surfaktan-minyak 4. Mikroemulsi dengan rasio surfaktan-minyak 4 memperlihatkan stabilitas terbaik.Mikroemulsi tersebut memiliki distribusi ukuran partikel monomodal, rerata diameter partikel dan viskositas mencapai 21,7 ± 0,02nm dan 6,0 ± 0,10cp (VCO), 22,9 ± 0,15nm dan 6,2 ± 0,05cp (minyak sawit).Kata kunci: Mikroemulsi, formulasi, stabilitas, surfaktan minyak

Kata kunci ABSTRACT Follin-Cialcetau Keywords PENDAHULUANPersea americana

Jack beans are one of the legumes with a high protein content to make protein isolates. This research aimed to evaluate the physical, sensory and proximate qualities of chicken sausages with jack bean protein isolate (JBPI) and the combination of JBPI and soy protein isolate (SPI) as a binder to improve the quality of the chicken sausages. This research included the preparation of JBPI and chicken sausages. The treatments were formulated as follows: control (without JBPI and SPI); T1 (SPI: JBPI = 100: 0); T2 (SPI: JBPI = 80:20); T3 (SPI: JBPI = 60:40); T4 (SPI: JBPI = 40: 60); T5 (SPI: JBPI = 20: 80); T6 (SPI: JBPI = 0: 100). The analysis of the physical, sensory, and proximate properties of sausages have been performed. The results showed that the JBPI protein content was high at 93.98% db, and contained higher essential amino acids than the FAO/WHO standards, i.e., leucine, lysine, phenylalanine + tyrosine, threonine. The combination of JBPI and SPI improved emulsion stability, lightness, yellowness, texture properties, protein content, and reduced cooking loss and redness of chicken sausages compared to control (p<0.05). The results of the sensory evaluation showed that the overall preference, slice properties, and texture attributes of chicken sausage with the addition of a combination of SPI and JBPI were 40:60 (T4) significantly different from the control received by the panellists (p<0.05). The formulation with the addition of a combination of SPI and JBPI of 40:60 was the optimal treatment because it improves the overall physical, sensory, and chemical characteristics of the resulting chicken sausage. JBPI had the potential as an alternative to substitution for SPI.

<p>Background<br />The decline in estrogens could lead to an imbalance of bone formation and absorption as well as bone mineralization. Phytoestrogens are known to have the potential to maintain bone health. Calcium and phosphorus are essential components for bone mineralization. This study aimed to investigate the effect of soybean sprout flour consumption on serum calcium and phosphorus levels in ovariectomized rats.</p><p>Methods<br />A randomized post-test-only control group design involving 25 female Sprague-Dawley rats aged 2 months, which were divided into five groups: (i) normal controls on standard feed diet AIN-93 (C-N), (ii) ovariectomy controls on standard feed diet (OVX -N); (iii) ovariectomized rats on standard feed diet + ethinylestradiol (OVX -E), (iv) ovariectomized rats on standard feed diet + soybean flour (OVX -S); (v) ovariectomized rats on standard feed diet + soybean sprout flour (OVX -SS). The rats were treated for 6 weeks, then on the last day of treatment blood sampling was conducted. Analysis of calcium and phosphorus in serum was performed using the Arsenazo III photometric method. Data were analyzed using one-way Anova.</p><p>Results<br />Mean serum calcium level was highest in the OVX-SS group (12.59 mg/dL ± 1.32), while mean serum phosphorus level was highest in the C-N group (1.708 mg/dL ± 0.28). Soybean sprout flour consumption had a significant effect on serum calcium levels (p=0.019), yet it had no effect on body weight and serum phosphorus levels of the rats.</p><p>Conclusion<br />Consumption of soybean sprout flour could positively affect serum calcium levels in rats.</p>