Accelerated Shelf Life Testing Research Articles

Effects of natural phenolics on shelf life and lipid stability of freeze-dried scallop adductor muscle

Effects of natural phenolics on the shelf life of dried scallop adductor muscle predicted by accelerated shelf life testing (ALST) combined with Arrhenius model were investigated. This allows the food industries to reliably and rapidly determine the shelf life of dried shellfish species treated with antioxidants. The shelf life of dried scallop adductor muscle treated with antioxidants of bamboo leaves (AOB) and tea polyphenols (TP) was more than 1.70-fold that of dried control scallop adductor muscle. Thus, the highly nutritional value of dried scallop adductor muscle, based on its lipid constituents, is maintained during storage. OXITEST method further confirmed the improvement of lipid stability of antioxidant treated dried scallop adductor muscle by protecting polyunsaturated fatty acids, especially eicosapentaenoic and docosahexaenoic acids, against autoxidation. Moreover, the natural phenolics employed effectively limited lipid oxidation by breaking the autoxidative chain reaction and/or inhibiting free radical formation in dried scallop adductor muscle during storage.

Effect of Roasting on Oxidative Stability of Pistachio Nut

Pistachio nut (Pistacia vera L.) is one of the most delicious and nutritious nuts in the world. Roasting process enhances the flavor, color, and texture of pistachio nuts and increases overall palatability of the valued products. Oxidative stability is also an important parameter for the quality assessment of pistachio nuts. The main objective of this study is to determine the effect of roasting on the oxidative stability of pistachio samples. For this purpose, pistachio kernels are roasted with two steps industrial roaster at different temperature; 110-120, 130-140, 150-160° C. Rancimat Method, which is one of the Accelerated Shelf – Life Test (ASLT) method, was used to determine the oxidative stability of raw and roasted pistachio nut kernel. The induction time (IT) of raw and roasted pistachio samples were automatically recorded at 100, 110, and 120°C. As the temperature increased induction time was significantly decreased during ASLT (p<0.05). The roasted pistachio sample was higher IT than IT of raw pistachio sample. Although increasing the oxidative stability with increasing roasting temperature, very high roasting temperature (150-160°C) decreased IT. As a result, roasting of pistachio nuts improved the oxidative stability of the nut. Keywords : Pistachio nut, roasting, oxidative stability, Rancimat method DOI : 10.7176/JSTR/5-5-14

Characteristic and Self-Life Test of Food Bar with Combination of White Millet, Snakehead Fish and Soy Flour

&lt;p&gt;Emergency food is needed when a disaster occurs. Emergency conditions encourage the provision of food that is ready to eat with sensory properties that can be accepted by the community, has sufficient nutrient content to meet the body's caloric needs and is resistant during storage. This study aims to obtain the best formulas of the food bar based on the parameters observed, namely sensory, chemical, total caloric, and a&lt;sub&gt;w&lt;/sub&gt; as well as its shelf life estimation with the Accelerated Shelf Life Test. Food bar was made from white millet flour and fish koya that was made from snakehead fish and soy flour. Intermediate moisture food (IMF) applied in this study with the initial formulation was determined using mass equilibrium. The effectiveness test was used to determine the best formula based on all observed parameters. The results showed that the best food bar formula was formula F2, which has a chemical composition consisting of moisture content (20,99±0,21%); ash (3,45±0,35%); fat (18,10±0,13%); protein (12,24±0,28%); and carbohydrates (45,22±0.32%), a&lt;sub&gt;w&lt;/sub&gt; (0,76±0,01); and total calories (per 50 g) was 232,04±1,96 kcal. The shelf life of food bar F2 was 19 days. Based on the results obtained, the total calories produced from the best formula have not met emergency food calorie standards.&lt;/p&gt;

Experimental accelerated shelf life determination of a ready-to-eat processed food.

The most direct way to estimate the shelf life of a product is to conduct simulation tests which are time consuming and expensive. Conversely, accelerated shelf life tests can be successfully used for stable products having long expected shelf life. The aim of the study was directed to verify the possibility to apply an accelerated shelf life test to perishable food products having a short-expected shelf life, such as a new ready-to-eat processed food preparation, composed mainly by cereals, tuna and chicken, packed in thermo-sealed trays and pasteurised. Different samples of the product were stored in thermal abuse conditions, collected periodically and subjected to determinations of TVB-N, pH and sensorial characteristics. Q10 and activation energy were calculated allowing to obtain a predictive evaluation of the product shelf life at the 4°C recommended temperature. The product shelf life was assessed at 26 days vs the 30 days expected by the manufacturer, showing the possibility to apply successfully ASLT for products having short shelf life, saving both time and money.

Shelf life estimation of rujak cingur instant sauce using accelerated shelf life testing (ASLT) method

Rujak cingur is one of Indonesian traditional cuisine. The process required to produce Rujak cingur sauce is time consuming. Manufacturing Rujak cingur instant sauce becomes an innovation to solve the problem. However, there is no information about shelf life of this sauce to guarantee its quality and safety. Therefore, it is necessary to estimate the shelf life of Rujak cingur instant sauce. The experimental method employed in estimating shelf life of Rujak cingur instant sauce is Accelerated Shelf Life Testing (ASLT). The temperatures used in this experiment were 30°C, 34°C, and 37°C. Parameters observed during the storage process were water content, Aw, fat content, FFAs, peroxide value, TBA value, and Total Plate Count. ANOVA testing results of sensory analysis as conducted by applying the spectrum method shows that storage time of Rujak cingur instant sauce affected salty taste, savoury taste, and rancid aroma of instant sauce. The estimation of shelf life of Rujak cingur instant sauce was performed by using the Arrhenius equation of: y = −10482x +31.864. The shelf life of Rujak cingur instant sauce at 25 °C was 89 days based on limitation of total microorganism contamination in product and was 113 days based on panellist rejection.

Optimization and multivariate accelerated shelf life testing (MASLT) of a low glycemic whole jamun (Syzygium cumini L.) confection with tailored quality and functional attributes.

An optimization and multivariate accelerated shelf-life testing (MASLT) was demonstrated to develop a low glycemic (GI) whole jamun (Syzygium cumini L.) confection (WJC) with soft texture and fruity hedonics targeted for diabetic strata. The hydrocolloids viz., agar (1-3g), pectin (1-3g), and polydextrose (24-28g) were optimized [mixture design (MD)] to obtain hydrocolloid mix (HM) with a soft texture. Next, whole jamun ingredients viz, jamun pulp (JP) (20-30g), seed powder (JSP) (1-5g), and HM (25-35g) were optimized (MD + PCA) for satisfactory texture, total polyphenolic content (TPC), and fruity hedonics. The optimized WJC was assayed for GI and modelled by univariate kinetics and MASLT (10-45°C/75% humidity/120days). Using MASLT, the collated effects of quality attributes (anthocyanin content, TPC, moisture, hardness, and total color change) were extracted as principal components to estimate new stability parameters viz, multivariate rate constants (k m), acceleration factors ( ), activation energy (E am), and cut-off criterion. The optimized WJC contains 2.3g agar, 1.9g pectin, 27.2g polydextrose, 26.4g JP, and 2g JSP and had satisfactory hardness (1007g), TPC (2.8mg gallic acid equivalents/g), and low GI value (48.6). The zero-order kinetic fitting of univariate versus MASLT resulted in , E a, and shelf life (10°C) of 7.8 versus 6.2, 43.81 versus 39.22kJ/mol and 175 versus 186days, respectively. MASLT simplified the kinetic interpretations to a single variable by collating the useful information from critical quality parameters and predicted shelf life precisely than univariate kinetics.

Shelf Life Prediction of Chocomix Instant Chocolate Beverage Powder Using Accelerated Shelf Life Testing (ASLT) based on Critical Moisture Content Approach

Chocomix chocolate beverage powder is one of the increased value-added cocoa products by Griya Cokelat Nglanggeran. The aimed of this study to estimate the shelf life using Accelerated Shelf Life Testing (ASLT) based on critical moisture content. Results showed that critical moisture content of Chocomix was 4.01 % (db). Moisture sorption isotherm (MSI) curve of Chocomix at 28oC was type II isothermic sigmoidal with 2 curves at the ranged of water activity between 0.24 and 0.68; and the equation was y = 86.584X3 – 91.893X2 + 28.818X – 0.470. The calculation showed that estimated shelf life of Chocomix stored in 51.89 µm thick package at 28oC was 16.4 months.Keywords: chocolate powder, critical moisture content, moisture sorption isotherm, shelf life

Hyperspectral imaging and multivariate accelerated shelf life testing (MASLT) approach for determining shelf life of rocket leaves

The feasibility of using spectral profiles for the estimation of the shelf life of the rocket leaves was evaluated using a multivariate accelerated shelf life testing (MASLT) approach. Spectral changes over time were modeled by using principal component analysis (PCA) and as variation to the conventional method, partial least squares (PLS) method. Kinetic charts were built fitting the first principle component (PC1) and the first latent variable (LV1) scores versus time. In both cases, the kinetics were described by a first order reaction, obtaining R2 values of 0.73, 0.94 and 0.95 for samples stored at 5, 10 and 15 °C, respectively. The spectra of samples judged unacceptable were used for the calculation of the cut-off value, estimated to be 3.955, leading to shelf life estimations of 9.8, 4.3 and 3.1 days for PCA based MASLT at the three temperatures, respectively. For PLS based MASLT the shelf life was 9.4, 4.5 and 3.3 days for samples stored at the three respective temperatures. Conclusively, shelf-life was correctly estimated by conventional MASLT using PCA and also with the newly proposed technique using PLS.

Optimization of Steamed Meals Based on Composite Flour (Taro, Banana, Green Bean) and Its Predicted Shelf Life

Ongol-ongol is for food diversification by mixing composite flour of taro, banana and mung bean, then was steamed by hot air. The purpose of this study was to find out the optimum way to produce ‘ongol-ongol’ from composite flour and to know the storage life by prediction method. The research consisted of two stages, namely the determination of the optimum formula of ‘ongol-ongol’ with Design Expert DX 8.1.6 software and the estimation of product shelf life of the optimum formula by ASLT (Accelerated Shelf Life Test) method. The optimum formula of the steamed meal was produced from composite flour and arenga flour with ratio of 50: 50 and flour to water ratio of 1: 1. The proximate content of steamed meal of optimum formula is 36.53% moisture content, ash content of 1,36%, fat content of 14.48%, protein level of 28.5%, and carbohydrate of 44.77% (w/w). Energy Value obtained from 100 g of ‘ongol-ongol’ was 320.8 Kcal. Recommended for steamed meal storage life is 12.54 days at ambient temperature.

PENDUGAAN UMUR SIMPAN MENGGUNAKAN METODE ACCELERATED SHELF-LIFE TESTING (ASLT) DENGAN PENDEKATAN ARRHENIUS PADA DESTILAT CUKA FERMENTASI HASIL SAMPING CAIRAN PULPA KAKAO

The atms of this study were (1) to knowing the change of quality characteristics from destilated fermentation vinegar from pulp liquid waste of cocoa beans during storage dan (2) to determine shelf life of destilated fermentation vinegar from pulp liquid waste of cocoa beans using Accelerated shelf-life testing (ASLT) method with Arrhenius approach. The observed Parameters is temperature. The temperature is 30 °C , 40 °C and 50 °C. The Observed variable is acetic acid content, pH, total dissolved solids and absorbance. The result showed that acetic acid content had the greatest decrease in 50 °C temperature. This shows that acetic acid content are inversely proportional to temperature rise. While the content of pH, total dissolved solids and turbidity experienced the greatest increase in 50 °C temperature. This shows that pH, total dissolved solids and turbidity are proportional to the temperature rise. The results of the calculation showed that at a temperature of 20 °C, 30 °C, 40 °C and 50 °C has a shelf life of 226 days, 167 days, 126 days, 96 days andn 75 days.&#x0D; Keywords: Destilated fermentation vinegar of cocoa, Accelerated shelf-life testing, Shelf life

PENENTUAN UMUR SIMPAN CUKA KAKAO MENGGUNAKAN METODE ACCELERATED SHELF-LIFE TESTING (ASLT) DENGAN PENDEKATAN ARRHENIUS

Cocoa vinegar is a fermented vinegar produced from a product of cocoa bean fermentation. The aims of this study were to determine quality change of cocoa vinegar during retention and determine its self-life by using Accelerated Shelf-Life Testing (ASLT) method by Arrhenius Equation Approach. This research was conducted by using one factor, and it was storage temperature treatment that consisting of 3 levels, 30, 40 and 50?C. Retention and observation start from 0 week until 16 weeks, with parameters that observe were acetic acid, pH, total suspended solid and turbidity. Cocoa vinegar has decreased quality during storage, at 30?C, 40?C and 50?C. During storage of the three temperatures, the temperature of 50?C suffered the most rapid deterioration with the characteristic of decreasing the acetic acid content by more than 50%, and the increase of pH, total suspended solid and turbidity on the 63rd day. Shelf life of cocoa vinegar by using the characteristic of acetic acid with linear regression equation y = -4624.x + 10.30 with R² = 0.999.at storage from temperature 10, 20, 30, 40, and 50?C respectively were 431 days (14.3 months). 246 days (8.20 months). 146 days (4.86 months). 89 days (2.96 months).and 56 days (1.86 months).&#x0D; Keywords: vinegar of cocoa, self-life prediction, ASLT method

Shelf life prediction of apple brownies using accelerated method

The aim of this research was to determine shelf life of apple brownies. Shelf life was determined with Accelerated Shelf Life Testing method and Arrhenius equation. Experiment was conducted at 25, 35, and 45°C for 30 days. Every five days, the sample was analysed for free fatty acid (FFA), water activity (Aw), and organoleptic acceptance (flavour, aroma, and texture). The shelf life of the apple brownies based on FFA were 110, 54, and 28 days at temperature of 25, 35, and 45°C, respectively.

Shelf-life dating of shelf-stable strawberry juice based on survival analysis of consumer acceptance information.

Accurate shelf-life dating of food products is crucial for consumers and industries. Therefore, in this study we applied a science-based approach for shelf-life assessment, including accelerated shelf-life testing (ASLT), acceptability testing and the screening of analytical attributes for fast shelf-life predictions. Shelf-stable strawberry juice was selected as a case study. Ambient storage (20 °C) had no effect on the aroma-based acceptance of strawberry juice. The colour-based acceptability decreased during storage under ambient and accelerated (28-42 °C) conditions. The application of survival analysis showed that the colour-based shelf-life was reached in the early stages of storage (≤11 weeks) and that the shelf-life was shortened at higher temperatures. None of the selected attributes (a* and ΔE* value, anthocyanin and ascorbic acid content) is an ideal analytical marker for shelf-life predictions in the investigated temperature range (20-42 °C). Nevertheless, an overall analytical cut-off value over the whole temperature range can be selected. Colour changes of strawberry juice during storage are shelf-life limiting. Combining ASLT with acceptability testing allowed to gain faster insight into the change in colour-based acceptability and to perform shelf-life predictions relying on scientific data. An analytical marker is a convenient tool for shelf-life predictions in the context of ASLT. © 2017 Society of Chemical Industry.

Estimation of shelf life of wikau maombo brownies cake using Accelerated Shelf Life Testing (ASLT) method with Arrhenius model

The shelf life of brownies cake made from wikau maombo flour was predicted by ASLT method through the Arrhenius model. The aim of this study was to estimate the shelf life of brownies cake made from wikau maombo flour. The storage temperature of brownies cake was carried out at 20°C, 30°C and 45°C. The results showed that TBA (Thio Barbaturic Acid) number of brownies cake decreased as the storage temperature increase. Brownies stored at 20°C and 30°C were overgrown with mold on the storage time of six days. Brownies product (WT0 and WT1) had shelf life at 40°C approximately six and fourteen days, respectively. Brownies made from wikau maombo and wheat flour (WT1) was the best product with had the longest of shelf life about fourteen days.

Shelf life prediction of canned fried-rice using accelerated shelf life testing (ASLT) arrhenius method

Research on shelf-life prediction of canned fried rice using Accelerated Shelf-life Test (ASLT) of Arrhenius model has been conducted. The aim of this research to predict shelf life of canned-fried rice products. Lethality value of 121°C for 15 and 20 minutes and Total Plate count methods are used to determine time and temperatures of sterilization process.Various storage temperatures of ASLT Arrhenius method were 35, 45 and 55°C during 35days. Rancidity is one of the derivation quality of canned fried rice. In this research, sample of canned fried rice is tested using rancidity value (TBA). TBA value was used as parameter which be measured once a week periodically. The use of can for fried rice without any chemical preservative is one of the advantage of the product, additionaly the use of physicalproperties such as temperature and pressure during its process can extend the shelf life and reduce the microbial contamination. The same research has never done before for fried rice as ready to eat meal. The result showed that the optimum conditions of sterilization process were 121°C,15 minutes with total plate count number of 9,3 × 101 CFU/ml. Lethality value of canned fried rice at 121°C,15 minutes was 3.63 minutes. The calculated Shelf-life of canned fried rice using Accelerated Shelf-life Test (ASLT) of Arrhenius method was 10.3 months.

Development and Physico-Chemical Characterization of a Shea Butter-Containing Lipid Nutrition Supplement for Sub-Saharan Africa.

Lipid-based nutrient supplements (LNS) are used to prevent and treat moderate and severe acute malnutrition, a leading cause of mortality in children-under-five. The physical and chemical changes of two new LNS products were evaluated before and after accelerated shelf life testing (ASLT) according to protocols suggested by the U.S. Agency for International Development (USAID) and Doctors without Borders and compared against USAID’s A-20 paste as a control. LNS formulas containing Shea butter from the Shea nut tree (Vitellaria paradoxa), a common fat source in parts of Sub-Saharan Africa, with and without flax-seed oil, as a source of omega-3 fatty acids, were developed. LNS formulas were batched (0.8 kg) in a wet grinder, sealed under nitrogen in three-layer mini-pouches (20 g), and underwent ASLT at 40 ± 2 °C for six months with sampling every eight weeks. At each time point, water activity, moisture, peroxide value, oil separation, vitamin C content, and hardness were evaluated. Results showed comparable stability among all formulas with an increase in Aw (p < 0.05) but no change in vitamin C, oil separation, or peroxide value. Addition of Shea butter improved the LNS’s hardness, which remained stable over time. Modifying fat profile in LNS can improve its texture and essential fatty acid content without affecting its storage stability.

Analisis Umur Simpan Bubuk Kakao dalam Kemasan Plastik Standing Pounch Menggunakan Pendekatan Model Arrhenius

Cocoa powder is usually used to be a raw material in the chocolate products. In the large scale production, cocoa powder must be stored at specific time period before it was used. The quality of cocoa powder can decrease during storage period hence shelf life analysis of cocoa powder is needed. The aim of this study was to determine the shelf life of cocoa powder by Accelerated Shelf Life Testing (ASLT) Method with Arrhenius Model Approach. Cocoa powder was stored at different temperature (30, 40, and 50oC) and different packaging type (plastic with zipper and paper craft with zipper) to simul atedacceleration of damage as a result of temperature increase. Cocoa powder contained high level of fat so it more easily gone rancid. Moisture content and peroxide value were observed periodically that shown the quality parameters of cocoa powder. Initial moisture content and fat content of cocoa powder were analyzed by gravimetric method. Degree of rancidity which was shown with peroxide value was analyzed by iodometric titration method. According to the change of peroxide value, the shelf life of cocoa powder can be estimated.

Benchmarking the minimum Electron Beam (eBeam) dose required for the sterilization of space foods

As manned space missions extend in length, the safety, nutrition, acceptability, and shelf life of space foods are of paramount importance to NASA. Since food and mealtimes play a key role in reducing stress and boredom of prolonged missions, the quality of food in terms of appearance, flavor, texture, and aroma can have significant psychological ramifications on astronaut performance. The FDA, which oversees space foods, currently requires a minimum dose of 44kGy for irradiated space foods. The underlying hypothesis was that commercial sterility of space foods could be achieved at a significantly lower dose, and this lowered dose would positively affect the shelf life of the product. Electron beam processed beef fajitas were used as an example NASA space food to benchmark the minimum eBeam dose required for sterility. A 15kGy dose was able to achieve an approximately 10log reduction in Shiga-toxin-producing Escherichia coli bacteria, and a 5log reduction in Clostridium sporogenes spores. Furthermore, accelerated shelf life testing (ASLT) to determine sensory and quality characteristics under various conditions was conducted. Using Multidimensional gas-chromatography–olfactometry–mass spectrometry (MDGC-O-MS), numerous volatiles were shown to be dependent on the dose applied to the product. Furthermore, concentrations of off –flavor aroma compounds such as dimethyl sulfide were decreased at the reduced 15kGy dose. The results suggest that the combination of conventional cooking combined with eBeam processing (15kGy) can achieve the safety and shelf-life objectives needed for long duration space-foods.

The Impact of Water Activity on Storage Stability of a Newly Reformulated Salami A pilot scale study

Two formulations of salami were obtained: a conventional salami (50 % beef, 20 % pork and 30 % animal fat, w/w) and a reformulated one (50 % beef, 20 % pork and 30 % a mixture of olive and palm oil - 2.5:1, w/w). Storage studies were performed by accelerated shelf life testing at 20�C and different relative humidity, in comparison with 4 and 8�C after 22 days of storage. Halsey model was the best one to describe the desorption isotherms. The products stability was evaluated by TBA (thiobarbituric acid) index and colour changes. TBA increased with the increase of the environment relative humidity at 4 and 8�C. Modified Weibull model described the changes in colour as a function of TBA and water activity. Bound water characteristics have markedly changed at 20�C for both products. The results of this work can be used as reference in defining reformulated salami minimal durability.

Qualitative Characteristics and Determining Shelf-Life of Milk Beverage Product Supplemented with Coffee Extracts.

This study was conducted to establish the shelf-life of a milk beverage product supplemented with coffee extracts. Qualitative changes including peroxide value (PV), microorganism content, caffeine content, and sensory evaluation were measured periodically in beverages kept at 10, 20, and 30°C for 8 wk. Lipid oxidation of the product was measured by peroxide value analysis, and apparent changes were observed during a 4 wk storage period. Caffeine analysis revealed that the changes in caffeine content were negligible during the storage period. Total aerobic bacteria, Escherichia coli, yeast, and mold were not detected in the products during an 8 wk storage period. Sensory evaluation revealed that after 4 wk of storage overall acceptance was less than 3 points on a 5-point scale. In this study, PV was used as an indicator of the shelf-life of the milk beverage product. PV analysis revealed that a value of 20 meq/kg was the end of the shelf-life using the Arrhenius equation and the accelerated shelf-life test (ASLT). Assuming that the beverages are kept at 4°C during distribution, calculation of when the PV reached the quality limit point (20 meq/kg) was done with the equation ln(PV) = 0.3644X − 2.21834 and, using that equation, PV = e0.3644X-2.21834 was calculated. Therefore, 14.3086 wk was determined to be the shelf-life of the milk beverage supplemented with coffee when stored at 4°C.