scholarly journals Prediction of Physicochemical Properties of Pummelo Juice Concentrates as a Function of Temperature and Concentration

2008 ◽  
Vol 4 (7) ◽  
Author(s):  
Nyuk L Chin ◽  
Suit M Chan ◽  
Yus Aniza Yusof ◽  
Teong Guan Chuah ◽  
Rosnita A Talib
Keyword(s):  
Vitamin C ◽  
Moisture Content ◽  
Physicochemical Properties ◽  
Water Activity ◽  
Fruit Juice ◽  
Multiple Linear Regressions ◽  
Processing Industry ◽  
Juice Processing ◽  
Physical Composition ◽  
Linear Regressions

The properties of pummelo juice were studied by measuring its chemical and physical composition. Pummelo fruit juice was freeze-concentrated to a concentration varying from 10 to 50 °Brix for investigation at temperature ranging from 6 to 75 °C. The fresh pummelo juice compositions in terms of moisture content, ash, fat, protein, fibre, carbohydrates, and vitamin C are comparable to existing literature. The water activity, pH and acidity were predictable linearly by its concentration measured in °Brix. The density of pummelo juice was well-predicted using linear regressions with a single parameter (i.e., concentration), giving R2>0.983 and with a temperature at R2>0.921. The density of pummelo juice showed stronger dependence on its concentration than on the temperature. With multiple linear regressions, the density could be predicted by the equation, with an R2 of 0.9877. As such, these predictions are useful in the juice processing industry as densities variant by concentration and temperature are important during the pasteurization process.

scholarly journals Effect of gamma irradiation on physicochemical properties and microbiological quality of wet yellow noodle fortified with water spinach (Ipomoea aquatica)

Food Research ◽  
2019 ◽  
pp. 34-41
Author(s):  
Wan Zunairah W.I. ◽  
Nuradilah, M.P. ◽  
Ahmad Zainuri M.D. ◽  
Nor-Khaizura M.A.R. ◽  
Nor Afizah, M. ◽  
...  
Keyword(s):  
Moisture Content ◽  
Physicochemical Properties ◽  
Gamma Irradiation ◽  
Water Activity ◽  
Microbiological Quality ◽  
Textural Properties ◽  
Water Spinach ◽  
Cooking Properties ◽  
Breaking Length

Effect of gamma irradiation on physicochemical properties and microbiological quality of wet water spinach yellow (WYS) noodles were investigated. Water spinach has been substituted with the wheat flour at level 5%, 10% and 15% and irradiated at 0 kGy, 3 kGy, 5 kGy and 7 kGy with a dose rate of 34 Gy/minutes by using Cobalt-60. Gamma irradiation significantly decreased the cooking yield, hardness and lightness while significantly increased cooking loss and breaking length of WYS noodles. All doses of irradiation did not affect the moisture content, pH, water activity, greenness and yellowness of the noodles. Cross sections of WYS noodles were observed under VPSEM at 500X magnification and irradiation gave little changes to starch granules. Increasing substitution level of water spinach and irradiation dose showed elongated and clumped together. Moisture content and color of yellow noodles increased gradually on increasing the level of water spinach substituted. However, a decreasing trend was observed in breaking length, hardness, lightness and yellowness. Total plate counts of the WYS noodles that stored at 27°C were examined at day 0, 3 and 5. It showed that certain dose such as 7 kGy of irradiation able to reduce the bacteria count in noodles. On day 5, most of the samples showed high bacteria count more than 108 CFU/g was not safe to be consumed. In conclusion, gamma irradiation and substitution of water spinach gave significantly effect cooking properties, textural properties and lightness while no effect on moisture content, pH, water activity, greenness and yellowness of WYS noodles.

Study on the Effect of Xylitol and Maltitol as Alternative Sweeteners in Sponge Cakes

2020 ◽  
Vol 16 (3) ◽  
pp. 403-409
Author(s):  
Fardin Javanmardi ◽  
Mir-Michael Mousavi ◽  
Afsaneh T. Ghazani ◽  
Mansour Mahmoudpour ◽  
Faran Taram ◽  
...  
Keyword(s):  
Moisture Content ◽  
Physicochemical Properties ◽  
Water Activity ◽  
Specific Volume ◽  
Cake Volume ◽  
Calorie Content ◽  
Two Samples ◽  
Sensory Analyses ◽  
Sensory Evaluations ◽  
High Calorie

Background: As the main sweetener in sponge cakes, sucrose provides not only energy and structure, but also acts as a stabilizer and tenderizer. Due to its high-calorie content, alternative sweeteners such as xylitol and maltitol are used in its place. Objective: The purpose of this study is to substitute sugar with xylitol and maltitol in sponge cake. Methods: In this study, the possibility of producing sugar free sponge cakes with xylitol and maltitol was evaluated (control: 100% sucrose, M1: 100% xylitol, M2: 75% xylitol-25% maltitol, M3: 50% xylitol-50% maltitol and M4: 25% xylitol- 75% maltitol). Sensory evaluations and physicochemical properties of the final product such as water activity, moisture content, firmness, cake volume, crust color and sensory analyses were determined. Results: Based on the results obtained from the four samples, M3 and M4 resulted in a significant decrease in volume. The highest specific volume was obtained in M2. The last two samples, M1 and M2 showed lower water activity than the control. In addition, the highest dark crust color was obtained in M1. M2 produced a softer texture and thus produced cakes with the highest flavor. Conclusion: The results of the study showed that complete substitution of sucrose with 75% xylitol and 25% maltitol (M2) produced samples with similar crust color, firmness, volume and porosity in comparison with control cakes.

Efficent Use of Antioxidants to Preserve Fruit Juice

2009 ◽  
Vol 59 (12) ◽  
Author(s):  
Mirel Glevitzky ◽  
Mariana Pop ◽  
Gabriela-Alina Brusturean ◽  
Ioana Bogdan ◽  
Mirela Calisevici ◽  
...  
Keyword(s):  
Vitamin C ◽  
Shelf Life ◽  
Production Process ◽  
Water Activity ◽  
Orange Juice ◽  
Fruit Juice ◽  
Antioxidants Activity ◽  
Natural Extracts

In order to follow up spoilage of fruit juice: apple and orange juice, treated or non-treated with synthesis antioxidants and powder natural extracts, the samples have been analysed during production process and after storage for 5 days at a temperature of 500C (ASLD method - accelerated shelf life determination), by determining the vitamin C content, the clarity and colour, and also the water activity. Previously, antioxidants activity was calculated for the synthesized compounds and powder natural extracts.

scholarly journals Fabrication of Spray-Dried Microcapsules Containing Noni Juice Using Blends of Maltodextrin and Gum Acacia: Physicochemical Properties of Powders and Bioaccessibility of Bioactives during In Vitro Digestion

Foods ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1316 ◽  
Author(s):  
Chuang Zhang ◽  
Siew Lin Ada Khoo ◽  
Peter Swedlund ◽  
Yukiharu Ogawa ◽  
Yang Shan ◽  
...  
Keyword(s):  
Moisture Content ◽  
Physicochemical Properties ◽  
Water Activity ◽  
Bioactive Compounds ◽  
In Vitro Digestion ◽  
Core Material ◽  
Gum Acacia ◽  
Tapped Density ◽  
Spray Dried

Microencapsulation of fermented noni juice (FNJ) into powder format could protect bioactive compounds, reduce the unpleasant odour and improve the acceptability for consumers. Blends of maltodextrin (MD) and gum acacia (GA) were used to achieve spray-drying microencapsulation of noni juice at different blending ratios. The physicochemical properties including microstructure, moisture content, water activity, particle size, bulk/tapped density, dissolution rate, ATR-FTIR and the bioaccessibility of bioactive compounds in powders during in vitro digestion were examined. Results showed that blends produced with more GA produced microcapsules with lower moisture content, water activity and bulk/tapped density, but slower powder dissolution. The ATR-FTIR results suggested that there were no significant chemical interactions between the core material and carrier or between the MD and GA in the blend powders. The spray-dried noni juice powder produced using the blends with higher ratio of GA to MD showed a better protection on the bioactive compounds, resulting in a higher bioaccessibility of powders during in vitro digestion. This study provides insights into microencapsulation of noni juice using blends of MD and GA and examines the physicochemical properties and bioaccessibilities of spray-dried powders as affected by the selected carriers.

scholarly journals Physical-chemical Evaluation and Texture Profile of Yoghurts Supplemented with Achachairu Pulp (Garcinia humilis)

2020 ◽  
Vol 8 (1) ◽  
pp. 101
Author(s):  
Sâmela Leal Barros ◽  
Newton Carlos Santos ◽  
Renata Duarte Almeida ◽  
Victor Herbert de Alcântara Ribeiro ◽  
Israel Luna Alves ◽  
...  
Keyword(s):  
Vitamin C ◽  
Moisture Content ◽  
Water Activity ◽  
Viscosity Index ◽  
Textural Properties ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Texture Profile ◽  
Fresh Pulp ◽  
Texture Attributes

Yogurt is defined as being the product obtained through the fermentation of milk, its pleasant taste and high nutritional value are the main factors responsible for the acceptance of the product in the market. The present study aims to evaluate the physicochemical and textural properties of a yoghurt supplemented with 0, 5, 10, 15 and 20% Acacchairu pulp. Fresh pulp and yoghurt were submitted to the following physicochemical analyzes: moisture content and total solids, pH, total titratable acidity, total soluble solids, ratio, water activity, vitamin C and lipids. Regarding the texture profile, only yogurts were evaluated the following parameters: firmness, consistency, cohesiveness and viscosity index. Achachairu pulp presented high moisture content and water activity, as well as low percentage of lipids. Higher values were obtained regarding moisture content, water activity, acidity, lipids and vitamin C in the formulations with higher pulp percentage and for all texture attributes the formulation with 0% pulp obtained the highest values. The formulations proposed with the addition of different pulp concentrations improved the physicochemical and texture attributes of yogurt.

scholarly journals Evaluation of physicochemical characteristics and digestibility of an extrudate with common bean for pigs

2021 ◽  
Vol 27 (1) ◽  
pp. e2172
Author(s):  
Elia Esther Araiza-Rosales ◽  
José Natividad Gurrola-Reyes ◽  
Francisco Óscar Carrete-Carreón ◽  
Juan Fernando Sánchez-Arroyo ◽  
Carlos Urban Haubi-Segura ◽  
...  
Keyword(s):  
Moisture Content ◽  
Physicochemical Properties ◽  
Bulk Density ◽  
Water Activity ◽  
Dry Matter ◽  
Water Solubility ◽  
Dry Matter Digestibility ◽  
Bean Flour ◽  
Extruded Feed

Objective: To evaluate the physicochemical properties of an extruded feed using bean (Phaseolus vulgaris L.) as a soymeal substitute and to perform pig growth trials, evaluating nitrogen digestibility. Materials and methods: This research was divided into two stages, the first one consisted on the standardization of the extruded feed, where two formulations of bean flour (Pinto Saltillo variety), cornflour (Cafime variety), and soybean meal were evaluated: 20/67/13% and 30/60/10%, respectively. Samples were processed in a single screw extruder at 120-150°C and moisture content of 18-22%. Evaluated physicochemical properties were: expansion index, bulk density, water absorption index, water solubility index, hardness, water activity and color parameters: L*(clarity), a*(red-green chromaticity) and b* (yellow/blue chromaticity). In the second stage, the in vitro dry matter digestibility and fecal apparent digestibility were evaluated using the optimal treatment obtained from stage 1. Results:  Optimal conditions for the 20% of bean flour formulation were: Temperature of 124.4°C and moisture content of 18.59%. Extrusion temperature decreased bulk density, hardness, and water activity, but increased L* and expansion index. Moisture content decreased bulk density, water activity, hardness, and a*. In vitro dry matter digestibility was higher for the extruded bean diet in comparison to the control diet (92.33% vs. 85.33%). Conclusions: Results indicated that bean flour is a viable option for animal consumption in terms of nutritional value and good digestibility.

Influence of Operating Parameters on Physicochemical Properties of Fruit Juice Powders Produced by Spray Drying

2014 ◽  
Vol 941-944 ◽  
pp. 1196-1200
Author(s):  
Li Li Zhang ◽  
Chuan Chuan Ma
Keyword(s):  
Moisture Content ◽  
Physicochemical Properties ◽  
Bulk Density ◽  
Air Temperature ◽  
Flow Rate ◽  
Fruit Juice ◽  
Air Flow ◽  
Compressed Air ◽  
Operating Parameters ◽  
Air Flow Rate

This paper investigated the influence of operating parameters such as inlet air temperature, compressed air flow rate, concentration of carrier agent and type of carrier on the physicochemical properties of fruit juice powders produced by spray drying.The results indicated that increasing inlet air temperature resulted in the larger size particles with smoothly spherical appearance, and to lower bulk density and moisture content. The bulk density of powders also decreased with increasing carrier agent concentration, decreasing compressed air flow rate. The higher feed flow rate negatively affected process yield and positively influenced moisture content, and occurring the wall deposition easily. Additionally, the anthocyanin retention mainly depends on the inlet air temperature and type of carrier. Moreover, the novel methods and ideas to this problem in the next studies were presented.

scholarly journals Membrane-Based Operations in the Fruit Juice Processing Industry: A Review

Beverages ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 18 ◽  
Author(s):  
Carmela Conidi ◽  
Roberto Castro-Muñoz ◽  
Alfredo Cassano
Keyword(s):  
Energy Consumption ◽  
Nutritional Value ◽  
Fruit Juice ◽  
New Technologies ◽  
Membrane Distillation ◽  
Low Energy ◽  
Processing Industry ◽  
Osmotic Distillation ◽  
Juice Processing ◽  
Low Energy Consumption

The fruit juice industry is one of the food sectors that has invested the most in the implementation of new technologies, such as non-thermal technologies. Among them, membrane processes are considered today well-established separation techniques to support the production and marketing of innovative fruit juices designed to exploit the sensory characteristics and nutritional peculiarities of fresh fruits. Pressure-driven membrane operations, membrane distillation, osmotic distillation and pervaporation have been widely investigated in the last few decades to replace conventional technologies used in fruit juice processing industry (i.e., clarification, stabilization, concentration and recovery of aroma compounds). This paper will review the significant progresses on the use of membrane-based operations in fruit juice processing industry in the light of the growing interest towards products with improved safety, quality and nutritional value and sustainable processes characterized by low energy consumption and low environmental impact.

scholarly journals KARAKTERISTIK FISIK, KIMIA DAN ORGANOLEPTIK VEGETABLE LEATHER CABAI HIJAU (Capsicum annuum var. annuum) DENGAN PENAMBAHAN BERBAGAI KONSENTRASI PEKTIN

2017 ◽  
Vol 10 (1) ◽  
pp. 21
Author(s):  
Putri Devi Permatasari ◽  
Nur Her Riyadi Parnanto ◽  
Dwi Ishartani
Keyword(s):  
Tensile Strength ◽  
Vitamin C ◽  
Moisture Content ◽  
Water Activity ◽  
Thin Sheet ◽  
Concentration Addition ◽  
Significance Level ◽  
Physical Chemical ◽  
Organoleptic Characteristics ◽  
Randomized Design

<p><em>Vegetable leather is a thin sheet-shaped product made of vegetables (puree) are processed by drying method. Green chilli contains high vitamin C, low calories value 23 cal/100 gr and contain fibers which is quite high as 1.3 g/100 g. In this study, pectin hydrocolloid was added to improve less plastic texture in vegetable leather. The purpose of this research is to identify the influence of the variation concentration of pectin against physical characteristics (tensile strength), chemical (water activity, moisture content, ash contain, vitamin C, fiber and calories value) and organoleptic (colour, flavour, taste, texture, and overall) vegetable leather green chilies as well as knowing the best concentration of pectin that based on physical, chemical and organoleptic characteristics of vegetable leather green chilies. Experimental design used in this research was Completely Randomized Design (CRD) based upon one factor which was the effects of pectin concentration addition. Research data were analyzed by one way ANOVA method and continued using DMRT analysis on the significance level α = 0.05,  if there were significant differences between the means. The result showed that variations in the concentration of pectin have significant effect on water activity, moisture content, ash contain, and fiber. However, the variations of pectin concentration does not affect the value of tensile strength, vitamin C and calories value. Based on the analysis of physical, chemical, and organoleptic shows the vegetable leather green chili with the addition of 0.3% pectin is the best formula. Vegetable leather green chilies with 0.3% pectin concentration has tensile strength 4.6866 N, water activity 0.55, moisture content (wb) 14.959%, ash contain (db) 19.209%, food fiber (db) 15.795%, calories value 3.015,551 cal/g.  </em></p>

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