Pengaruh Proporsi Daun Beluntas (Pluchea Indica Less) Dan Teh Hijau Terhadap Aktivitas Antioksidan Produk Minuman

Beluntas has many benefits especially on its leaves because of the phytochemical contents. Therefore, beluntas needs to be combined with other ingredient that can increase the antioxidant activity. One of ingredient that can be combined with beluntas is green tea. Green tea is a beverage that is often consumed and has various health benefits, because of the polyphenol compound contents from flavonoid group, mainly catechins. This research was aimed to determine the effect of beluntas leaves and green tea proportion on antioxidant activity of beverage product. The design of this research used single factor randomized block design. Factors that were researched were beluntas leaves and green tea proportion with five level factors, which were P1, P2, P3, P4 and P5. The results showed that the proportion of beluntas leaves and green tea powder significantly affected on phytochemical compounds, total phenol, total flavonoids, DPPH scavenging activity, and iron ion reducing power. Phenolic content was ranged from 451.13-707.63 mg GAE/L sample, flavonoid content was ranged from 95.73-413.73 mg CE/L sample, DPPH scavenging activity was ranged from 193.38-277.79 mg GAE/L sample, and iron ion reducing power was ranged from 211.50-499.50 mg GAE/L sample. Total phenolic and total flavonoid contents were positively correlated with the ability to scavenge free radical DPPH and the ability to reduce iron ion. This means that the higher of phenolic and flavonoid contents in beluntas green tea beverage had the higher the antioxidant capacity. The results showed that P3 had the highest antioxidant activity

Pengaruh Konsentrasi Madu terhadap Sifat Fisikokimia dan Sifat Organoleptik Minuman Beluntas-teh Hitam dengan Perbandingan 25:75% (B/b)

Based on previous research is found the proportion of beluntas leaves powder and black tea the best of 25 : 75% (w/w). However, specially the discovery of the organoleptic properties (aroma and taste) that are less in demand by consumers and a decrease of total phenols, flavonoids, ability to scavenge free radicals, as well as the ability to reduce ferric (Fe3+) ion to ferrous (Fe2+) ion. One solution being taken to overcome these obstacles is the addition of honey as a sweetener and natural antioxidants. Research was conducted to determine the effect of honey concentration on physicochemical properties and organoleptic properties of functional beverage beluntas and black tea proportion of 25:75% (w/w). The research design was randomized block design with single factor. Factor that had been done the concentration of the honey including P1, P2, P3, P4, P5, and P6 (w/v). Each treatment had been repeated four times. The results showed that concentration of honey significantly affected on physicochemical properties and organoleptic properties of beverage product. Turbidity value was ranged from 6.31-20.14 NTU; pH value was ranged from 6.65-6.96; titratable acid was ranged from 0.0040-0.0177 mg gluconat acid/100 mL infusion; hue angle value was ranged from 25.49º-54.76º; and chroma value was ranged from 2.19-2.63. Appropiate concentration of honey to get the best treatment from organoleptic test was P6 with color value 7.14; flavour value 6.59; taste value 7.35; turbidity value 18.04 NTU; pH value 6.65; titratable acid value 0.0177 mg GAE/100 mL; hue angle value 25.49º; and chroma value 2.63

Pengaruh Konsentrasi Putih Telur Terhadap Sifat Fisikokimia Dan Organoleptik Sari Buah Pala (Myristicafragrans Houtt)

The aim of research was to determine the effect of egg white concentration on physicochemical and sensory properties of nutmeg fruit juice. Randomized Block Design was used in this research with factor namely egg white concentration that consisted of six levels (0%, 1%, 2%, 3%, 4%, 5%). Each level was replicated four times. Parameter tested were pH, titratable acidity, precipitate percentage and sensory (preference of appearance, colour, and taste). Data were be analyzed with Analysis of Variance (ANAVA) (α= 5%). If ANAVA showed a significant effect, it was followed by Duncan's Multiple Range Test (α= 5%). The results showed that egg white concentration significantly affected on pH, titratable acidity and precipitate percentage. The higher egg white concentration, pH value and the percentage of precipitation increased, but titratable acidity decreased. pH value ranged from 3.20- 3.32, titratable acidity value ranged from 71 mL NaOH 0.1N/ 100 mL – 80.92 mL NaOH 0,1N/ 100 mL, the percentage of precipitation ranged from 2.09% - 14.73%. Egg white concentration also significantly affected on the appearance that ranged from 4.71-5.87 (rather do not like – rather like) and taste preferences ranged from 5.09-5.79 (neutral – rather like), but did not significantly affect colour preferences thar ranged from 5.02- 5.33 (neutral – rather like)