PERAN TAWAS TERHADAP PERURAIAN PROTEIN IKAN TONGKOL

Beberapa produsen ikan asap di daerah Bandarharjo Semarangmenggunakan tawas sebagai perendam ikan sebelum diasap. Penelitiandilakukan dengan cara merendam ikan tongkol dalam larutan tawas 0, 3, 6 dan 12 persen selama 1 jam. Secara umum pemberian tawas dalam larutan dapat mempengaruhi kadar protein, kadar nitrogen terlarut, kadar asam amino, dan kadar protein terlarut pada ikan yang direndam. Ada kecenderungan semakin tinggi konsentrasi tawas yang digunakan untuk merendam semakin tinggi pula kadar nitrogen terlarut, kadar asam amino dan protein terlarut. Penggunaan tawas dalam larutan juga mengeluarkan material dari daging ikan tongkol yang direndam ke larutan perendam, semakin tinggi konsentrasi tawas semakin tinggi material yang keluar. Tawas dapat menguraikan makromolekul proteinmenjadi mikro molekul seperti nitrogen terlarut dan asam amino. Dan tawas dapat mempengaruhi kelarutan protein menjadi lebih larut dalam air.Kata Kunci = Tawas, Ikan Tonkol dan Protei

PENGARUH PENAMBAHAN TAWAS TERHADAP SIFAT MIKROBIOLOGI, FISIK DAN LAMA SIMPAN MIE

Boilling noodle by tawas solution was decrease sum of microbes and increaselong time of storeage. Higher concentration of tawas solution had effect decrease sum of microbes and increase long time of storeage. The research result was be analysis by ANOVA on 0.05 significant thas this was effect boiling by concentration of tawas solution on total of microbes and long time of storeage on noodle. Boilling noodle by tawas solution had trend increase noodle elasticity, although the effect was not significant.Key words : tawas, property of microbiologi, property of fisic and long time ofstoreag

Changes In Vitamin C and Total Microbes Of Papaya Fruit (Carica papaya L.) Which Is Processed Minimally Using Edible Coating Of Agar-agar Based On The Storage Time

Minimal processing and edible coatings began to be known to provide food security and improve the quality of food products at the time of storage. This study was to determine the effect of minimal processing using agar-agar based on storage time to changes in vitamin C and total microbes papaya (Carica papaya L.).This research is an experimental laboratory study with the research design used is a two-factor Randomized Completely Design (CRD). The number of units used in the study was 28 samples followed by samples without agar coating. Data on vitamin C were measured by the iodimetry method, total microbes by the Total Plate Count (TPC) method. The statistical test used was the Two Way Anova. There are differences in the results of tests of vitamin C levels, total microbes and weight loss between the treatment and control groups. There is a minimal processing effect using agar-agar on vitamin C levels (ρ = 0.006) and total microbes (ρ = 0,000). Minimal processing using agar-agar coatings based on long storage effect on the levels of vitamin C and total microbes papaya (Carica papaya L.

PRAKTEK PENGGORENGAN DAN MUTU MINYAK GORENG SISA PADA RUMAH TANGGA DI RT V RW III KEDUNGMUNDU TEMBALANG SEMARANG

Praktek penggorengan akan mempengaruhi kualitas minyak dan makanan yang digoreng. Penelitian ini bertujuan untuk mengetahui praktek penggorengan dan mutu minyak sisa pada rumah tangga. Rancangan penelitian ini adalah diskriptif analitik, informasi praktek penggorengan diperoleh dengan wawancara, mutu minyak goreng sisa diketahui dengan analisis Free Fatty Acid (FFA) dan bilangan peroksida. Sampel 20 orang dari 59 populasi, sampel minyak goreng sisa diperoleh dari responden. Analisis FFA menggunakan prosedur Sudarmadji, et al (1997) sedang bilangan peroksida dengan metode AOCS Cd 8-53 dalam Nielsen  (1996). Hasil wawancara menunjukkan sebanyak 75 % responden menggunakan minyak goreng curah. Dalam penggorengan digunakan minyak goreng sisa yang ditambahkan minyak segar, minyak goreng yang sama digunakan untuk menggoreng beberapa macam makanan. Tidak ada perlakukan untuk merawat/menyimpan minyak goreng sisa yang masih akan digunakan lagi. Kadar FFA dan peroksida secara keseluruhan lebih tinggi dari ketentuan SNI untuk minyak segar. Kadar FFA tertinggi sebanyak 8,335 %, terendah 0,479 %, bilangan peroksida tertinggi 93,394 meq peroksid/kg fat, terendah 0,990 meq peroksid/kg fat. Penyuluhan tentang praktek penggorengan dan perawatan /penyimpanan minyak diperlukan untuk mempertahankan mutu minyak dan makanan goreng

SIFAT FISIK, KIMIA DAN ORGANOLEPTIK NUGGET KEONG SAWAH DENGAN BAHAN PENGISI PATI TEMU IRENG

Snails fields is a type of freshwater snails and easy to find in the rice fields, ditches, and lakes. This animal is widely consumed in various regions of Southeast Asia and has good nutritional value because they contain high protein. Starch is made of extraction of Curcuma aeruginosa roxb, starch component retrieval is 49.56% so it has the potential to be extracted and used as a starch source material. The purpose of this research is to know elasticity, protein content, moisture content, fat content and flavor nuggets snail fields based on the addition of starch as filler Curcuma aeruginosa roxb retrieval. Variations addition of starch is carried out snails field (K): starch of Curcumaaruginosa roxb (P) (K100: P0, K80: P20, K75: P25, K70: P30, K65: P35, K60: P40, K55: P45). The research design used was Completely Randomized Design (CRD). Results indicated the highest elasticity in starch concentration of 45% is 14.94 N / mm, protein content in starch concentrations of 0% (48.4%), fat content at a concentration of 45% (30.03%), water content at 0 % (15.30%). Results favorite flavor nuggets snail with substitution K55: P45 with a value of 2.86 and substitution ofproducts with K100: P0 has the smallest value that is equal to 2.43.Keywords: snails field nuggets, starch of Curcuma aeruginosa roxb, qualit

KADAR PROTEIN, VITAMIN C, DAN SIFAT ORGANOLEPTIK BUBUR BAYI DARI CAMPURAN TEPUNG KECAMBAH KACANG-KACANGAN DAN JAGUNG

Legumens is a protein recources with corns are completing each other. The goal of this research is to know the profile of protein, vitamin C, and organoleptic characteristic of baby’s porridge from mixture of legumens sprout and corn flour. Variation of the mixture of sprout from legumens (soybean, brown bean and mung bean (50%,75%) and sprout of corn (25%,50%). The result of the research shows that there is an influence from variety of the mixture of legumens sprout and corn flour toward contents of protein, vitamin C, and organoleptic characteristic (color, taste, and texture). The highest protein contents in the mixture of sprout of brown bean 75% and corn 25% (18,389 g %) and vitamin C in the mixture of sprout of brown bean 50% and corn 50%, (20 mg %) and organoleptic characteristic in the mixture of sprout of brown bean 75% and corn 25% with the score 4,75

AKTIVITAS ANTIBAKTERI DAN SIFAT ORGANOLEPTIK YOGURT SUSU JAGUNG MANIS DENGAN PENAMBAHAN SUKROSA

Sweet corn milk yogurt with the addition of sucrose is one of the fermentation product of lactic acid bacteria. The purpose of this study was to determine the effect of adding sucrose to the antibacterial activity and organoleptic properties. This study uses a single factor completely randomized design with repeated 4 times, the materials used are sweet corn, plain yogurt, skim milk and sucrose concentrations 0%, 1%, 2%, 3% and 4%. The variables measured were the antibacterial activity using diffusion test and organoleptic properties to the assessment of test scoring panelists. Results showed was significant of adding sucrose to the antibacterial activity of E. coli (8.91 mm) and Salmonella thyphi (9.99 mm). Cs Not significantly of the organoleptic test on fragrance, color and viscosity, however the highest score of sweet corn milk yogurt on the addition of 4% sucrose