Purwadi

Physico Chemical Properties of Whey Protein and Gelatine Biopolymer Using Tea Leaf Extract as Crosslink Materials

The purpose of this research was to extract tea leaf phenols using Microwave Assisted Extraction (MAE) method at 3 levels of microwave power (high, medium high and medium) and investigated the influence of physco chemical properties of whey protein and gelatine biopolymer using tea leaf extract as crosslink materials at different concentration (5%, 10% and 15% (v/v)). MAE method gave significantly effect on phenolic content. High level power of MAE gave higher phenolic content of tea leaves extracts. Tea leaves extracts as crosslinked agent of biopolymer gave highly significant effect on the stability of the emulsion, the emulsion activity and foaming power. SDS-PAGE protein profile showed increase molecular weight with the addition of tea leaf extract, it can be presumed presence crosslinked both on whey protein or gelatine. key words: Tea leaf extract, crosslink materials, protein whey, gelatine, physico chemical.

PENAMBAHAN MADU PADA MINUMAN WHEY KEFIR DITINJAU DARI MUTU ORGANOLEPTIK, WARNA, DAN KEKERUHAN

The objective of this research was to determine the optimum honey addition on kefir whey drink based on organoleptic quality (colour, aroma, taste), colour test, and turbidity. The method used in this research was experiment with Completely Randomized Design (CDR) by used 4 treatments and 4 replications. The treatments were P0 = without the honey added, P1=added by 20% honey, P2 = added by 30% honey and P3 = added by 40% honey (v/v). The data were analyzed by Analysis of Variance (ANOVA), if there were significantly difference, the data would analyzed by Duncan’s Multiple Range Test. The results showed that honey addition gave highly difference significant (P<0.01) on organoleptic quality (colour, aroma, taste), turbidity and lightness (L*). Honey addition didn’t give significantly difference (P<0.05) on redness (a*) and yellowness (b*). The conclusion of this research was the best treatment will the value is added by 40% honey with colour 3.25±0.78, aroma 3.50±1.14, taste 3.75±1.01, lightness (L) 31.57±0.5, redness (b*) 0.95±0.12, yellowness (b*) 0.050±0.36, and turbidity 306.7±6.65 NTU

Manufacture of Goat Milk Dadih Incubated using Variety of Bambooes

The objective of this research was to determine the best bamboo that can be used in the manufacture of dadih among apus, ori, betung and black bamboo based on acidity, protein content, pH and total of microorganisms of goat milk dadih. The materials used in this research was the dadih made from ingredients such as goat milk, banana leaf and bamboo. The methods used in this study was experiment with 4 treatments and 4 replications the data were analyzed by ANOVA, if there were a significantly different continued by Duncans multiple range test. The result showed that the kind of bamboo gave highly significant different effect (p<0,01) on acidity, protein content, pH and total of microorganisms. According to the value of acidity, protein content, pH and total of microorganisms, it can concluded that the use of bamboo ori gave the best result in performance of dadih that the average of acidity was 0.37 ± 0.02%; protein content was 4.82 ± 0.13%; pH was 6.47 ± 0.05 and total of microorganisms was 6.298 ± 0.62072 Log cfu/mL.