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"Food Chemistry"
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Kitchen chemistry
Have you ever wanted to perform your own experiments? You could buy a chemistry kit or you could also use your kitchen as your very own chemistry lab.
Book
A review of the methods used to determine the target site or the mechanism of action of essential oils and their components against fungi
Essential oils (EOs) are complex mixtures of compounds derived from plants that exhibit antimicrobial activity. Several studies have demonstrated their antifungal activity in food matrices or in vitro via vapor phase or direct addition. Recently, researchers are focusing on elucidating the target site or the mechanism of action of various EOs. Past research has suggested evidence of how EOs act in the fungal cells via assays assessed from cell wall alterations or gene expression modifications. However, no previous reports have summarized most methods for finding the target site of the mechanism of action for EOs. Therefore, this review presents the methods and assays used to discover the target site or the mechanism of action of EOs against fungal cells. Researchers commonly analyze the plasma membrane integrity using various techniques as well as the changes in cell morphology. Meanwhile, the quantification of the activity of the mitochondrial enzymes, ROS species, and gene expression are less assayed.
Journal Article
Passion fruit (Passiflora edulis) peel powder extract and its application towards antibacterial and antioxidant activity on the preserved meat products
This study aimed to explore the antioxidant and antibacterial compounds in
P. edulis
peels and to identify the effectiveness of
P. edulis
peels extract on preserved meat. In this research studies, the antioxidant compound from sample extract of
P. edulis
peel is determined using total flavonoid and total phenolic content respectively. TPC of 7.273 ± 0.002 mg GAE/g extract was detected while TFC of 8.364 ± 0.002 mg QE/g extract was found significantly. LC-QTOF_MS confirmed the phenolic compounds in the
P. edulis
extract. Antibacterial ability of sample extract is proven by inhibition zone observed in agar plate that containing four types of foodborne pathogen extract exerted a strong antibacterial activity against three tested strains which were
E. coli
,
Serratia
and
Aureus
. The effectiveness of sample extract on meat antioxidant is determined using DPPH when percentage of scavenging activity up to 13%, ABTS with 60%, reducing power assay with 48% and metMY reach maximum percentage which is 70% at day 6. The pH value of marinated meat with sample extract indicated that the meat is safe and not required immediate consumption after 9 days. In conclusion,
P. edulis
peels extract can be considered as a natural antioxidant and antibacterial on meat as well as food preservative for frozen meat.
Journal Article
Antioxidative study of polysaccharides extracted from red (Kappaphycus alvarezii), green (Kappaphycus striatus) and brown (Padina gymnospora) marine macroalgae/seaweed
Sterile and fresh tissues of three marine macroalgae red, green and brown (
Kappaphycus alvarezii, Kappaphycus striatus
and
Padina gymnospora
) collected from Malaysia east costal seas were compared for the antioxidants and polysaccharide composition of sugars as well as the active components. Results obtained showed that polysaccharides isolated from
Kappaphycus alvarezii, Kappaphycus striatus
and
Padina gymnospora
) can be used as a source of natural antioxidant compounds as they possess antioxidant potential in which the
Padina gymnospora
showed 15.56 ± 0.12 mg/mL to be the best antioxidants among all the polysaccharides studied. The hot water extraction method is effective in isolating polysaccharides from studied seaweeds. The GC–MS analysis revealed that there is presence of chemical compounds such as furfural was 25.53% in
Kappaphycus alvarezii
and 21.04% in
Kappaphycus striatus
also
Padina gymnospora
incorporates n- Hexadecanoic acid about 26.31% in seaweed polysaccharides that contribute to their antioxidant activities. Further studies can be done on determining the seaweed species that are available abundantly with the best source of natural antioxidant compounds.
Journal Article
Physicochemical, nutritional, bioactive compounds and fatty acid profiling of Pumpkin flower (Cucurbita maxima), as a potential functional food
The edible flowers and its several products gaining its importance as functional food. Pumpkin flower mainly consumed in India and Mexico but due to lack of scientific research there is a neophobia among people. The objective of the paper is to analyse the physicochemical, biochemical properties, proximate analysis, antioxidant activities, anthocyanin content and fatty acid profiling. The fresh pumpkin flower was having an average moisture content of 85% (wb) with a dimension of 90 × 51 x 22 mm (l x w x t). The (L, a*, b*) value signifies the bright yellow color having gumminess (26 g) and chewiness (4.70 mJ). In this study the nutritional properties of the pumpkin flower were also determined and significant amount of Sodium (11.5 mg/100 g), Potassium (18.2 mg/100 g), Calcium (17.6 mg/100 g), phenol (17.39 µg/ml), flavonoid (17.13 µg/ml), antioxidant (51.65%DPPH) and anthocyanin (10.3 mg/100 g) was present. Among several fatty acids’ oleic acid (21%), myristic acid (15.99%) and stearic acid (15.19%) was maximum. The presence of several phytonutrients and fatty acids makes pumpkin flower a potential source of functional food in near future.
Graphical abstract
Journal Article
The flavor matrix : the art and science of pairing common ingredients to create extraordinary dishes
\"As an instructor at one of the world's top culinary schools, James Briscione thought he knew how to mix and match ingredients. Then he met IBMWatson. Working with the supercomputer to turn big data into delicious recipes, Briscione realized that he (like most chefs) knew next to nothing about why different foods taste good together. That epiphany launched him on a quest to understand the molecular basis of flavor--and it led, in time, to The Flavor Matrix, [an] ... ingredient-pairing guide\"-- Provided by publisher.
Book
Analytical methods for food and dairy powders
Food and dairy powders are created by dehydrating perishable produce, such as milk, eggs, fruit and meat, in order to extend their shelf life and stabilise them for storage or transport. These powders are in high demand for use as ingredients and as food products in their own right, and are of great economic importance to the food and dairy industry worldwide. Today, the ability to control food and dairy powder quality is a source of key competitive advantage. By varying the dehydration process design, and by controlling the technological and thermodynamic parameters during dehydration, it is possible for manufacturers to engineer the biochemical, microbiological and physical characteristics of the food powder to meet their specific product requirements. This book provides an overview of the existing, adapted or new techniques used to analyse safety and quality in modern food and dairy powders. Based on original research by the authors, the book uses 25 commercial dairy and non-dairy powders to illustrate a range of biochemical and physical methods used to evaluate and characterise powdered food products. Written from a practical perspective, each chapter focuses on a particular analytical technique, outlining the purpose, definition and principle of that method. The authors guide the reader through all of the instruments needed, the safety measures required, and the correct procedures to follow to ensure successful analysis. Instructions on accurate measurement and expression of results are included, and each chapter is richly illustrated with original data and worked examples. Analytical Methods for Food and Dairy Powders is a unique step-by-step handbook, which will be required reading for anyone involved in the development and manufacture of powdered food products. Food and dairy scientists based in industry will find it essential for new product development and improved quality control, while researchers in the laboratory will especially value the new techniques it comprises.
eBook