Effects of Seawater Polyphenols from on Photosynthesis and Biochemical Compounds of the Invasive Alien Species (Phaeophyceae, Heterokontophyta).

is a native brown alga in Europa, known for its high release of phenolics into the water. is a native brown macroalga from Asia but invasive in Europe, causing significant environmental and socioeconomic impacts. It has been observed that in some regions where is present, there is less biomass of , and they are often epiphytized by red filamentous algae.

Seaweeds of the Israeli Mediterranean Sea: Nutritional and Biotechnological Potential Through Seasonal and Species Variation.

Macroalgae (seaweeds) produce unique bioactive metabolites that have enabled their survival for millions of years, offering significant potential for human benefits. In the Israeli Mediterranean Sea, no comprehensive systematic surveys of seaweeds have been published since the 1990s, and their chemical composition remains largely unexplored. This study presents an extensive survey of intertidal seaweed communities along the shallow Israeli coastline, documenting their spatial, temporal, and biochemical diversity.

Environmental Stressors Modulating Seasonal and Daily Carbon Dioxide Assimilation and Productivity in .

Carbon dioxide (CO) emissions due to human activities are responsible for approximately 80% of the drivers of global warming, resulting in a 1.1 °C increase above pre-industrial temperatures. This study quantified the CO assimilation and productivity of the brown macroalgae in the central Pacific coast of Chile, across seasonal and daily cycles, under different environmental stressors, such as temperature and solar irradiance.

Ecophysiological and Biochemical Responses of to Solar Eclipse-Induced Light Deprivation.

Light variability is a key environmental stressor influencing the physiology and productivity of marine macroalgae. This study examined the ecophysiological and biochemical responses of (Ochrophyta) during a natural light deprivation event caused by a solar eclipse. We measured the in vivo chlorophyll (Chl) fluorescence, photoinhibition, and photosynthetic capacity, along with the pigment content, phenolic compound accumulation, and antioxidant capacity, to evaluate short-term photosynthetic adjustments.

Biochemical Composition and Alkaline Extraction Optimization of Soluble Bioactive Compounds from the Green Algae .

There is a growing interest in studying the bioactive compounds of invasive green macroalga due to their potential biotechnological applications. Algal samples were collected from two sites and seasons. Elemental analysis showed the abundance of carbon in the raw material as a source of carbohydrates.

Liposomal encapsulation of crocin-rich tomato extract (Tomafran) and its in-depth evaluation as a cosmeceutical ingredient.

This study evaluates the potential of a genetically modified, crocin-rich tomato extract (Tomafran) as a biological photoprotector and for skin health applications. Biochemical characterization and antioxidant capacity of Tomafran were assessed. Tomafran showed lower values than saffron in the ABTS assay, but similar values in the DPPH and BCBA assays.

Photomorphogenic and Biochemical Effects of Radiation and Nitrate Availability on the Red Alga .

Non-photosynthetic photoreceptors detecting different wavelength ranges in the UV and visible region of spectra may trigger algal acclimation and homeostasis. We studied responses based on the saturation of photosynthesis by Amber light and supplementation by different light qualities, applying an experimental design able to simulate a daily cycle in a fully automated system. Thalli were exposed to Amber, Amber + UV-A, Amber + Blue and Amber + Green radiation treatments under two nitrate levels (60 and 240 μM) for enrichment lasting two weeks.

Photosynthetic Activity Measured In Situ in Microalgae Cultures Grown in Pilot-Scale Raceway Ponds.

The microalga sp. (Chlorophyceae) was cultured in a raceway pond (RWP) placed in a greenhouse. The objective of this case study was to monitor the photosynthesis performance and selected physicochemical variables (irradiance, temperature, dissolved oxygen concentration) of microalgae cultures in situ at various depths of RWP.

Physiological responses of the alien macroalga Rugulopteryx okamurae (Phaeophyceae, Heterokontophyta) to changes in nutrients and temperature.

The Asian brown macroalga Rugulopteryx okamurae has invaded the oligotrophic areas of Mediterranean coasts since 2015, with drastic impacts on environmental conditions and socioeconomic activities in coastal areas in Europe. Therefore, it is intriguing how this species is able to grow and expand at the observed rates. In this context, the physiological responses of R.

Novel synthetic UV screen compounds inspired in mycosporine-like amino acids (MAAs): Antioxidant capacity, photoprotective properties and toxicity.

The combination of environmental stress on the ozone layer, climate change and a greater sun exposure due to outdoor habits has led to an increase in skin cancer cases and other health issues related with UV radiation. Researchers are searching for new alternative UV filters that could protect our skin from the deleterious effects of UV radiation while also presenting low toxicity and biodegradable character (unlike the UV filters currently available in the market). In this work, two compounds inspired in the natural oxo-mycosporine-like amino acids (MAAs) have been synthesized and their antioxidant and photoprotective properties, as well as their in vitro and in vivo toxicity effects were evaluated.

Optimizing the Extraction of Bioactive Compounds from (Rhodophyta): Evaluating Alkaline and Enzymatic Hydrolysis for Nutraceutical Applications.

is one of the most economically significant and widely cultured and consumed algae in the world. species present excellent nutraceutic properties due to their bioactive compounds (BACs). This research aimed to find the most efficient aqueous extraction method for BACs by examining alkaline and enzymatic hydrolysis.

The Role of Nitrate Supply in Bioactive Compound Synthesis and Antioxidant Activity in the Cultivation of (Rhodophyta, Bangiales) for Future Cosmeceutical and Bioremediation Applications.

has economic importance for food and pharmaceutical industries due to its significant physiological activities resulting from its bioactive compounds (BACs). This study aimed to determine the optimal nitrate dosage required in short-term cultivation to achieve substantial BAC production. A nitrate experiment using varied concentrations (0 to 6.

Combined Dietary Administration of and Ethanol-Inactivated Modulates Intestinal Microbiota and Gene Expression in .

The use of functional feeds in aquaculture is currently increasing. This study aimed to assess the combined impact of dietary green microalgae and ethanol-inactivated DCF12.2 (CVP diet) on thick-lipped grey mullet () juvenile fish.

Antitumor and antioxidant activities of polysaccharides from the seaweed Durvillaea antarctica.

The present study was carried out to determine the antitumor and antioxidant activities of the seaweed Durvillaea antarctica. Extraction and purification of polysaccharides from D. antarctica were performed.

Isolation of Mycosporine-like Amino Acids from Red Macroalgae and a Marine Lichen by High-Performance Countercurrent Chromatography: A Strategy to Obtain Biological UV-Filters.

Marine organisms have gained considerable biotechnological interest in recent years due to their wide variety of bioactive compounds with potential applications. Mycosporine-like amino acids (MAAs) are UV-absorbing secondary metabolites with antioxidant and photoprotective capacity, mainly found in organisms living under stress conditions (e.g.

Photosynthesis and biochemical characterization of the green alga Chlamydopodium fusiforme (Chlorophyta) grown in a thin-layer cascade.

Photosynthesis, growth and biochemical composition of the biomass of the freshwater microalga Chlamydopodium fusiforme cultures outdoors in a thin-layer cascade were investigated. Gross oxygen production measured off-line in samples taken from the outdoor cultures was correlated with the electron transport rate estimated from chlorophyll a fluorescence measurements. According to photosynthesis measurements, a mean of 38.

Could secondary flows have made possible the cross-strait transport and explosive invasion of Rugulopteryx okamurae algae in the Strait of Gibraltar?

Presently, the Strait of Gibraltar is undergoing an unprecedented invasion of the alien alga Rugulopteryx okamurae of North Pacific origin. According to the scarce literature, the algae first settled in the south shore, probably following commercial exchanges with French ports where it was accidentally introduced together with Japanese oysters imported for mariculture. There is no certainty, however, that the algae first colonized the south shore of the Strait and, from there, spread to the north.

Biomass, photosynthetic activity, and biomolecule composition in Chlorella fusca (Chlorophyta) cultured in a raceway pond operated under greenhouse conditions.

Raceways are widely used as microalgae culture systems due to their low cost, but they are not the best option for biomass yield. Understanding in situ photosynthetic performance can be a first step to increase their biomass productivity. This study aimed at comparing the real time photosynthetic activity in a greenhouse raceway culture (250 L) with discrete measurements under laboratory conditions.

Photosynthetic performance of Chlamydopodium (Chlorophyta) cultures grown in outdoor bioreactors.

The microalga Chlamydopodium fusiforme MACC-430 was cultured in two types of outdoor pilot cultivation units-a thin-layer cascade (TLC) and a raceway pond (RWP) placed in a greenhouse. This case study aimed to test their potential suitability for cultivation scale-up to produce biomass for agriculture purposes (e.g.

Holistic Photoprotection, Broad Spectrum (UVA-UVB), and Biological Effective Protection Factors (BEPFs) from Hydrolysates Polyphenols.

Overexposure to solar radiation has become an increasingly worrying problem due to the damage to the skin caused by ultraviolet radiation (UVR). In previous studies, the potential of an extract enriched with glycosylated flavonoids from the endemic Colombian high-mountain plant as a photoprotector and antioxidant was demonstrated. Therefore, in this work we sought to develop a dermocosmetic formulation with broad-spectrum photoprotection from the hydrolysates and purified polyphenols obtained from this species.

Dietary Effects of a Short-Term Administration of Microalgae Blend on Growth Performance, Tissue Fatty Acids, and Predominant Intestinal Microbiota in .

Given the potential of microalgae as new aquafeed ingredients, this study focuses on using a blend of microalgae, , , and , as a dietary ingredient for feeding juveniles. The growth performance, carcass composition, tissue fatty acid profile, and intestinal microbiota were evaluated after a 30 day-feeding period. A microalgae-free diet was used as control, and three experimental diets were formulated containing 5%, 15%, and 25% of the microalgae blend (MB-5%, MB-15%, and MB-25%, respectively).

Evaluation of the Combined Administration of and in Diets for : Effects on Growth, Metabolism, and Digestive Functionality.

This study aimed to evaluate the combined effect of dietary and ethanol-inactivated DCF12.2 (C + V diet) in juveniles, highlighting their nutritional, physiological, and morphological effects. The results showed that the combined dietary inclusion of and significantly enhanced growth performance and feed utilization compared to the control group.

Molecular Diversity and Biochemical Content in Two Invasive Alien Species: Looking for Chemical Similarities and Bioactivities.

The biochemical composition, molecular diversity, and two different bioactivities of and (two alien species with different invasive patterns in the southern Iberian Peninsula) were analyzed through spectrophotometric methods and Fourier transform ion cyclotron mass spectroscopy (FT-ICR-MS). A total of 3042 molecular formulas were identified from the different extracts. The HO extracts were the most molecularly different.