Article Per Year (5 Year)
p-Index From 2020 - 2025
0
P-Index
This Author published in this journals
All Journal Jurnal Teknologi Pertanian Jurnal Ilmu dan Riset Akuntansi
Apriliastuti Apriliastuti
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Synergistic Hydrolysis of Arrowroot (Marantha arundinaceae L.) Starch by -Amylase, Glucoamylase, and Pullulanase for Glucose Syrup Production Yunianta, Yunianta; Sulistyo, Tri; Apriliastuti, Apriliastuti; Estiasih, Teti; Wulan, Siti Narsito
Jurnal Teknologi Pertanian Vol 11, No 2 (2010)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (244.388 KB)

Abstract

The purified -amylase, glucoamylase and pullulanase were used for hydrolysis of arrowroot starch (Marantha arundinaceae L.) a local tuber from Indonesia. This arrowroot starch is a potential source for glucose syrup production. The amylolytic activities of α-amylase, glucoamylase (from Aspergillus niger) and pullulanase (from Bacillus licheneformis) were 90 KNU/g, 260 GAU/g and 390 ASPU/g, respectively. These enzymes were used to study their synergistic effects on the hydrolysis of arrowroot starch to glucose syrup. We have studied the effect of α-amylase concentration (0.025%, 0.045%, and 0.065% (w/w)) and incubation time (1 hour, 1,5 hours, and 2 hours) during liquefaction process that was combined with 24 hours of saccharification process using 0.08% (w/w) dextrozyme (mixture of glucoamylase and pullulanase) in the glucose  syrup production.  This experiment showed that 1.5 hours of liquefaction process using 0.045% (w/w) of -amylase produced 24.64% of reducing sugar and 91.80 of dextrose equivalent.  The second experiment was focused on the determination of saccharification process, where 1 hour liquefaction process using 0.045% (w/w) of -amylase was combined with saccharification process using dextrozyme. In the saccharification process,  a various dextrozyme concentrations (0.04, 0.06, and 0.08 % (w/w)) and incubation times (24 hours, 48 hours, 72 hours) were studied in relation to glucose syrup production.  It was showed that 0.08% (w/w) of dextrozyme and 24 hours of incubation time gave the best result on glucose syrup with 24.88% of reducing sugar and 92.14 of dextrose equivalent.Keywords: arrowroot, -amylase, dextrozyme, liquefaction, saccharification, glucose syrup
PENGARUH KINERJA KEUANGAN DAN UKURAN PERUSAHAAN TERHADAP REAKSI INVESTOR Apriliastuti, Apriliastuti; Andayani, Andayani
Jurnal Ilmu dan Riset Akuntansi (JIRA) Vol 4, No 12 (2015)
Publisher : STIESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The purpose of this research is to test the influence of financial performance and firm size to the reaction of investors. The samples are 60 companies which have been selected by using purposive sampling from the manufacturing companies of Food and Beverages sector which are listed in Indonesia Stock Exchange during the 6 years period from 2008 to 2013. The financial statement of the company and Composite Stock Price Index (IHSG) has been obtained from the Indonesia Stock Exchange Gallery. Meanwhile, the financial ratio and the stock price data have been obtained from the Indonesian Capital Market Directory and www.duniainvestasi.com. The classic assumption test and the multiple regressions analysis have been done by using SPSS statistic test version 20.0. The result of this research shows that the regressions models of this research do not have any heteroscedasticity, multicollinearity, and autocorrelation symptoms and the data has been normally distributed. The result of multiple analysis shows that Current Ratio (CR), Dept to Equity Ratio (DER), Return on Assets (ROA), Price Earnings Ratio (PER), and firm size do not have any significant influence to the Cumulative Abnormal Return (CAR). Meanwhile, Total Assets Turnover (TAT) has significant influence to the Cumulative Abnormal Return (CAR).Keywords: Financial Performance, Firm Size, and Investors’ Reaction (Cumulative Abnormal Return).
Co-Authors Andayani Andayani Dr.Ir. Yunianta, DEA Siti Narsito Wulan Teti Estiasih Tri Sulistyo