Papers by Albert Linton Charles
Journal of Molecular Liquids, 2018
Measurement, correlation, and thermodynamic properties for solubilities of bioactive compound (−)... more Measurement, correlation, and thermodynamic properties for solubilities of bioactive compound (−)-epicatechin in different pure solvents at 298.
Grape foods fermented with probiotics are sources of beneficial bacteria for the GI tract and als... more Grape foods fermented with probiotics are sources of beneficial bacteria for the GI tract and also have a high antioxidant capacity. The addition of probiotics to ferment food has always been a traditional process; therefore, probiotic dairy and non-dairy products might contribute to a daily antioxidant diet to improve consumers' life quality and health. This research was undertaken to determine the viability of 4 wild isolates of Lactobacillus for storage at 5 and 25ºC within 90 days in simulated synthetic grape media and a standard grape marmalade formulation. Changes in active culture numbers, pH level, glucose concentration, and antioxidant properties were evaluated. Most of the isolates demonstrated higher growth in the grape marmalade than the synthetic grape marmalade, which was greater than 7 Log cfu/g within 90 days of storage at 5ºC. In addition, most of the wild isolates grew beyond the critical count of 10 6 cfu/g in sampling between 60 and 90 days of storage. Moreover, fermented grape marmalade with probiotics showed a strong antioxidant capacity that failed to differ significantly with the synthetic medium. The study confirmed L. paraplantarum, L. plantarum, W. paramesenteroides, and E. feacalis were ideal probiotics for fermentation process of grape marmalade.
Poly Lactic Acid (PLA) is the first commodity polymer produced from renewable resources. It provi... more Poly Lactic Acid (PLA) is the first commodity polymer produced from renewable resources. It provides environmental benefits since it requires lower energy in polymer production and in turn reduces green house gas release. In recent years, Response Surface Methodology (RSM) is extensively used in optimization study due to its effective and time-saving advantages. It is widely used to predict surface responses and study the interactions among variables. Applying RSM, this study focuses on parameters optimization in microorganism fermentation process using Aneurinibacillus migulanus. The 3D response surface plots and 2D contour plots are created by Box-Behnken Design (BBD) and applied to optimize the fermentation process parameters. The results indicate three variables; pH, temperature (C) and shaking speed (rpm) have significant effects on PLA degradation. The optimum condition is obtained as: pH 8, 40.5 C and 194 rpm. In addition, the strain degraded PLA film significantly at the max...
International Journal of Food Science & Technology
International Journal of Food Science & Technology
International Journal of Biological Macromolecules
Future food packaging trends are shifting to natural and eco-friendly materials developed from bi... more Future food packaging trends are shifting to natural and eco-friendly materials developed from biopolymers such as starch and other hydrocolloids, to reduce pollution from synthetic polymers. Arrowroot starch (AS) (3.5, 3, 2.5, and 2%) and iota-carrageenan (IC) (0.5, 1, 1.5, and 2%) were blended to develop biodegradable edible films (AS/IC-BEF), which were compared against AS-BEF (4%, control). All films were characterized based on their physico-mechanical and barrier properties, functional group properties, crystallinity properties, thermal properties, and soil and seawater biodegradation. AS-BEF exhibited smooth surface, high transparency, and completed composting soil biodegradation in 7 days whereas AS/IC-BEF samples exhibited higher tensile strength, water solubility, swelling properties, and barrier properties, but completed biodegradation after 30 days. XRD analysis indicated IC fractions contributed to increase in degree of crystallinity (28.35°) and FTIR signaled strong hydrogen bond interactions between polymers. AS/IC-BEF samples demonstrated melting temperatures between 158 and 190 °C while glass transition temperatures ranged from 153 to 176 °C, which resulted in maximum weight loss around 50-55% at melting temperatures. Finally, AS/IC-BEF samples successfully inhibited weight loss of cherry tomatoes at room temperature and extended their shelf life to 10 days, which indicated that the AS/IC composite material produced a BEF with potential food and industrial applications.
International Journal of Food Science & Technology
International Journal of Food Science & Technology
LWT
Abstract Tea is considered as a healthy beverage due to the presence of bioactive compounds. Neve... more Abstract Tea is considered as a healthy beverage due to the presence of bioactive compounds. Nevertheless, the presence of caffeine adversely affects human health. Therefore, caffeine-free herbal beverages are gaining popularity as widely consumed healthy beverages; however, only few studies have thoroughly investigated the characteristics of herbal infusions. Therefore, the study was focused to develop Kyoho grape skin herbal infusions to study their proximate, functional as well as sensory attributes. Moreover, similarities in formulations were assessed by principal component analysis (PCA) and hierarchical cluster analysis (HCA). The results showed that the Kyoho grape skin formulations (40%, 50%, 60%, and 70%) had insignificant amounts of proximate composition. The amount of total phenolics (0.08–0.14 mg GAE/mL) and flavonoids (0.08–0.10 mg QE/mL) was associated with their antioxidant activities (DPPH• of 19.98%–65.20%). Formulations with 40% and 50% Kyoho grape skin received acceptable sensory scores (>6) that showed a high homogeneity between two formulations using PCA (PCs 1: 50.74% and 2: 14.26%) and HCA sub-clusters. Thus, formulations prepared with 40% and 50% of Kyoho grape skin could be considered as a suitable herbal beverage to be produced on an industrial scale.
International Journal of Food Science & Technology
Food Research International
Food Research International, the peer-reviewed international journal launched in 1992, celebrated... more Food Research International, the peer-reviewed international journal launched in 1992, celebrated its 26 years anniversary in 2018. Therefore, we presented an overview on the trending profile of Food Research International and its scientific achievements from 1992 to 2018 by identifying its trends in impact factor, h-index, journal rank, most cited articles, institutes, and countries. The data were retrieved from the Web of Science Core Collection and Scopus®. Several scientific achievements were observed in publications (a total of 6,751), impact factor (0.63-3.57), and citations (a total of 1,78,770) over the 26-year period. The most cited documents were related to the interdisciplinary research within food science and technology and contributed to strengthen the progress of science within the field. In 2007, a systematic review published in Food Research International explored the understanding of microencapsulation and their applications, which captured the scientific attention on microencapsulation in global research community. The journal published in vitro antioxidant assays that highly contributed to the process and analytical applications in food processing industries. Food Research International reported a good citing (cites given) and cited (cites received) relationship with the leading journals within the field. Brazil (301) was the most productive country with the highest contributions to the journal. Overall, these findings highlighted the evolution, quality, and productivity of the journal and provided an opportunity for early-career researchers to conduct more innovative studies in food science and publish in Food Research International.
Journal of Applied Phycology
Seaweeds ( Kappaphycus alvarezii and Sargassum duplicatum ) are potentially rich sources of bioac... more Seaweeds ( Kappaphycus alvarezii and Sargassum duplicatum ) are potentially rich sources of bioactive compounds and functional constituents that are used in food applications. Sun, oven, vacuum, and freeze-drying techniques are commonly used seaweed drying techniques and could be classified as cheap (sun and oven) and expensive (vacuum and freeze) drying techniques based on ovens’ market price. Therefore, the study was designed to investigate the effect of cheap (sun and oven) and expensive (vacuum and freeze) drying techniques based on color and antioxidant potential of K. alvarezii and S. duplicatum using phenolic and antioxidant assays. Principal component analysis (PCA) and hierarchical cluster analysis (HCA) were employed to discriminate the drying techniques by instrumental color analysis. The results revealed that oven-dried seaweed extracts exhibited higher levels of phenolic (0.30 to 0.36 mg GAE g −1 ) and antioxidant potential (3.59 to 79.68%). PCA and HCA discriminated the drying techniques into two well-defined groups/clusters I (oven, vacuum, and freeze-drying) and II (sun drying) and revealed higher ΔE values of sun-dried seaweed samples, which was interpreted as color was preserved using drying techniques of cluster I. Overall, oven, vacuum, and freeze-drying techniques reported similarities in color characteristics and could be an alternate drying technique to preserve the color of seaweed cultivars. Therefore, oven drying technique is recommended due to low cost (compared with vacuum and freeze-drying) and an affordable alternative to sun drying, the preferred technique in fishing communities of low-and-middle-income countries, for the development of seaweed-enriched functional foods.
Antioxidants
Grape foods with probiotics are sources of beneficial bacteria for the gastrointestinal (GI) trac... more Grape foods with probiotics are sources of beneficial bacteria for the gastrointestinal (GI) tract and also have a high antioxidant capacity. The addition of probiotics to dairy food is a traditional process; therefore, probiotic non-dairy products might contribute to a daily antioxidant diet to improve consumer life quality and health. This research was undertaken to develop a grape marmalade with a probiotic base to investigate the potential antioxidant activity in the probiotic non-dairy product. Thus, changes in active culture numbers, pH level, glucose concentration, and antioxidant properties were evaluated. Most of the isolates demonstrated higher growth in the grape marmalade than the synthetic grape marmalade, which was greater than 7 log colony-forming units (CFU)/g within 90 days of storage at 4 °C. In addition, most of the wild isolates grew beyond the critical count of 106 CFU/g in sampling between 60 and 90 days of storage. Moreover, probiotic grape marmalade with prob...
Foods
Probiotic bacteria are usually encapsulated to increase their survival through passage of the sim... more Probiotic bacteria are usually encapsulated to increase their survival through passage of the simulated gastrointestinal tract (GIT). Four Lactobacilli were freeze-dried and encapsulated with maltodextrin (maltodextrin 1.25 g, whey 0.25 g, bacteria 0.5 g, and water 2 mL) and arrowroot starch (arrowroot 1.25 g, whey 0.25 g, bacteria 0.5 g, and water 2 mL). The effects of different coatings were evaluated for their viability in the GIT and yogurt. The findings indicated no significant differences at p > 0.05 in the survival of the encapsulated cells with increased concentrations of arrowroot and maltodextrin. The viability of the encapsulated bacteria was increased in the simulated GIT with high counts of 109 cfu/mL after 30 min stiffening in 1 µm size beads. However, the bead fermented yogurt exhibited insignificant difference on the survivability of the organisms in a simulated GIT after 15 days. Lactobacillus plantarum, Weissela paramesenteroides, Enterococcus faecalis, and Lact...
Journal of Applied & Environmental Microbiology
The definition of probiotics has been the topic of much discussion and the most recent definition... more The definition of probiotics has been the topic of much discussion and the most recent definition from FAO/WHO stipulates that probiotics are "live microorganisms, administered in adequate amounts, confer a health benefit on the host". Dairy products remain one of the most important sources of lactic acid bacteria. Today, these kinds of bacteria are of increasing interest as they are considered functional foods when combined with lactic acid bacteria. The identification and classification of isolates made difficult the research, since the benefits should only be pertinent to specific isolates. However, bacteria strains have a certain number of potential and well-established benefits. They may play a role in preventing and treating diarrhea and act on the immune system, improve lactose digestion, help the body to resist, and fight infection. Further researches need to be conducted to confirm the roles that lactic acid bacteria may play in antitumor effects, hyper cholesterol effects, preventing urogenital infections, alleviating constipation, and treating food allergies. In addition to food shelf-life and safety, consumers are showing interest in the relationship and bioactive roles of "functional foods' in preventing or managing non-transmissible chronic diseases. Since then, increased demand for non-dairy probiotic products has come from vegetarianism, milk cholesterol content, and lactose intolerance. Therefore, the establishment of the probiotic functional characteristics of isolated strains must be a key factor in the search for probiotic microorganisms and their inclusion in the food product design. This review presents a basic overview of the evaluation of technological and probiotic abilities of lactic acid bacteria strains and the determination of their probiotic properties.
Grape foods fermented with probiotics are sources of beneficial bacteria for the GI tract and als... more Grape foods fermented with probiotics are sources of beneficial bacteria for the GI tract and also have a high antioxidant capacity. The addition of probiotics to ferment food has always been a traditional process; therefore, probiotic dairy and non-dairy products might contribute to a daily antioxidant diet to improve consumers’ life quality and health. This research was undertaken to determine the viability of 4 wild isolates of Lactobacillus for storage at 5 and 25ºC within 90 days in simulated synthetic grape media and a standard grape marmalade formulation. Changes in active culture numbers, pH level, glucose concentration, and antioxidant properties were evaluated. Most of the isolates demonstrated higher growth in the grape marmalade than the synthetic grape marmalade, which was greater than 7 Log cfu/g within 90 days of storage at 5ºC. In addition, most of the wild isolates grew beyond the critical count of 106 cfu/g in sampling between 60 and 90 days of stor...
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Papers by Albert Linton Charles