Related Experiment Video
Updated: Mar 7, 2026
08:25
Inactivation of Pathogens via Visible-Light Photolysis of Riboflavin-5′-Phosphate
Published on: April 6, 2022
2.3K
Ultraviolet Irradiation Effect on Apple Juice Bioactive Compounds during Shelf Storage
Edmundo Juarez-Enriquez1, Ivan Salmerón2, Nestor Gutierrez-Mendez3
1Centro de Investigación en Alimentación y Desarrollo, Av. Rio Conchos S/N, Parque Industrial, Cd. Cuauhtémoc, Chihuahua 31570, Mexico. edjuen@gmail.com.
Foods (Basel, Switzerland)
|February 24, 2017
Summary
Ultraviolet irradiation effectively inactivates enzymes and microbes in apple juice, preserving beneficial antioxidants during storage. This ensures UV-treated apple juice remains a healthy beverage option for consumers.
Area of Science:
- Food Science
- Biotechnology
- Food Microbiology
Background:
- Polyphenol oxidase enzyme and microbial contamination affect apple juice quality and shelf-life.
- Pulsed ultraviolet (UV) light is a non-thermal processing technology with potential for microbial inactivation and enzyme deactivation.
Purpose of the Study:
- To evaluate the efficacy of UV irradiation in inactivating polyphenol oxidase and microbiota in apple juice.
- To assess the impact of UV treatment on bioactive compounds and the stability of apple juice during refrigerated and room temperature storage.
Main Methods:
- Apple juice was treated with UV irradiation at a dose of 345.6 J/cm².
- Evaluated changes in color, antioxidant capacity, polyphenol content, pH, titratable acidity, and total soluble solids.
- Assessed inactivation kinetics of polyphenol oxidase and microbial load during 24 days of storage at 4 °C and 20 °C.
Main Results:
- UV irradiation completely inactivated polyphenol oxidase and microbiota.
- A reduction in antioxidant capacity was observed immediately post-treatment.
- Ascorbic acid content decreased by up to 40% during storage, while total polyphenol content remained stable.
Conclusions:
- UV irradiation is effective for microbial and enzyme inactivation in apple juice.
- UV-treated apple juice maintains its polyphenol content during storage, offering a stable source of antioxidants.
- UV-treated apple juice can be considered a safe and nutritious beverage option.
Related Concept Videos
01:35Mutations
44.9K
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
44.9K
01:20Radical Autoxidation
3.3K
The oxidation of an organic compound in the presence of air or oxygen is called autoxidation. For example, cumene reacts with oxygen to form hydroperoxide. Autoxidation involves initiation, propagation, and termination steps. Many organic compounds are susceptible to autoxidation—especially ethers in the presence of oxygen, which form hydroperoxides. Even though this reaction is slow, old ether bottles contain small amounts of peroxide, which leads to laboratory explosions during ether...
3.3K
01:16Drug Product Stability
320
The long-term stability of drug products is critical to ensuring their quality, safety, and effectiveness over time. Stability directly influences a product's ability to maintain its intended characteristics, ensuring it performs as expected during its intended shelf life. Key attributes such as drug potency, impurities, dissolution, and other physicochemical measures of performance are tested to assess stability. These parameters indicate how well the product retains its quality over time and...
320
01:22Bioavailability: Influencing Factors
511
Bioavailability refers to the extent and rate at which a drug reaches systemic circulation in its active form. Extent refers to the amount of the drug that makes it into circulation, while rate is the speed at which it enters circulation. It is influenced by several factors critical for optimizing drug formulations, dosing regimens, and therapeutic outcomes.Physicochemical properties of drugs and formulationsThe solubility, stability, and dissolution rate of a drug significantly impact its...
511
01:26Physical Methods for Controlling Microbial Growth: Radiation and Filtration
1.4K
Radiation and filtration are essential tools for microbial control, targeting microorganisms through distinct mechanisms. Radiation eliminates microbes by damaging their DNA, either killing them or inhibiting their growth. Based on wavelength, radiation is classified into two types: nonionizing and ionizing radiation.Non-ionizing radiation, such as UV radiation (200–400 nm), is absorbed by DNA, causing defects that effectively disinfect surfaces, air, and water, including safety cabinets.
1.4K