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Pengaruh Whey dan Ekstrak Buah terhadap Total Bakteri Asam Laktat, Nilai pH, dan Adhesiveness Yoghurt Wihardi, Wihardi; Abduh, Setya Budi Muhammad; Al-Baarri, Ahmad Ni’matullah; Pramono, Yoyok Budi
Jurnal Aplikasi Teknologi Pangan Vol 4, No 4 (2015): November 2015
Publisher : Indonesian Food Technologists

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (169.756 KB) | DOI: 10.17728/jatp.v4i4.4

Abstract

Penelitian ini bertujuan untuk mengevaluasi pengaruh whey dan ekstrak buah, antara lain alpukat, salak, dan lengkeng dalam yoghurt untuk Bakteri Asam Laktat (BAL), pH, dan adhesiveness yoghurt bahan baku susu peternakan rakyat. Yoghurt dibuat melalui beberapa langkah, yaitu formulasi, inaktivasi bakteri oleh sistem Lactoperoxidase (LPOs) selama 30 menit, BAL inokulasi pada 3% (v/v), dan inkubasi pada 37°C selama 4 jam. Sebagai perlakuan, yoghurt diperkaya dengan whey dan ekstrak buah (3%, v/v) sebelum inaktivasi oleh bakteri. BAL, pH, dan adhesiveness diamati setiap jam. Kualitas yoghurt yang diperkaya dengan whey, alpukat, salak, dan lengkeng diukur pada jam ke-4 inkubasi. BAL untuk whey, alpukat, salak, lengkeng dan yoghurt kontrol masing-masing adalah 7,01; 7,21; 7,19; 7,13; dan 7,17 log CFU/ml. Nilai pH yang diperoleh untuk whey, alpukat, salak, lengkeng dan kontrol yoghurt masing-masing adalah 5,11; 4,61; 4,68; 4,67; dan 4,77, sedangkan adhesiveness masing-masing 2,56; 3,13; 2,70; 3,13; 2,96 gs. Semua hasil antar perlakuan tidak berbeda nyata. Dapat disimpulkan bahwa tambahan whey dan ekstrak buah-buahan di yoghurt memberikan kualitas yang sama (P> 0,05) dan memenuhi SNI. Selain itu, ekstrak alpukat di yoghurt mengakibatkan tingkat pertumbuhan tercepat spesifik inokulum, yaitu sebesar 0,67 CFU/s.
ANALISIS STABILITAS LERENG MENGGUNAKAN SOFTWARE PLAXIS 8.6 DENGAN DINDING PENAHAN TANAH (RETAINING WALL) (STUDI KASUS RUAS JALAN NASIONAL BANDA ACEH-MEDAN STA 83+135 GUNUNG SEULAWAH) Wihardi, Wihardi; Munirwansyah, Munirwansyah; Saleh, Sofyan M.
Jurnal Arsip Rekayasa Sipil dan Perencanaan (Journal of Archive in Civil Engineering and Planning) Vol 1, No 3 (2018): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (312.141 KB) | DOI: 10.24815/jarsp.v1i3.11768

Abstract

Road infrastructure is very important and is a key enabler for the economy. If the road infrastructure was damaged or had various problems such as sliding, the movement of goods and passengers will be hampered and delayed to the acceleration of development in the local area. The landslide and movement of groundwater is a problem that often occurs repeatedly on some streets. Therefore, it is necessary to study the strengthening of the slopes at the bottom of the road construction with retaining wall. This study aims to analyze slope stability by getting numbers Safety Factor (FK). The analysis is used to analyze the stability of slopesusing the finite element method with the help of software Plaids, The scope of this review includes the calculation of slope stability at the national road from Banda Aceh - Medan Sta. 83 + 185 Mount Selawah. The results of slope stability analysis on the existing condition by using Plaxis software at the point of a review is not safe (FK <1.25). Thus, it is done handling the retaining wall, installation of anchors. Based on the analysis of slope stability after being given the strengthening of the slopes with a retaining wall and the installation of anchors using Plaxis software under the influence of traffic load in an unsafe condition (FK <1.25). Then additional handling is done by changing the angle of the slope so that the value of the safety factor (FK)> 1.25.