![]() ![]() Girls were less likely to be perceived as highly able than boys with similar levels of ability. High ability judgments by teachers were found to depend more on everyday school achievement (GPA) than on cognitive ability (IQ) itself, even when teachers were urged to distinguish between achievement and ability. Building on a large survey among 7th graders and their teachers, this study considers which student characteristics affect teacher and peer recognition of high ability students. They can be valuable components of many products that protect against free radical attack and also prevent diseases associated mainly with oxidative stress.Īccurate teacher judgments of student cognitive ability are crucial to effective instruction. ![]() These studies show that algae extracts have great potential in the cosmetics, pharmaceutical or agricultural industries. Nine phenolic compounds (gallic acid, chlorogenic acid, syringic acid, p-coumaric acid, myricetin, 3,4-dihydroxybenzoic acid, vanillic acid, 4-hydroxybenzoic acid and rutin) were identified using qualitative analysis by high-performance liquid chromatography. Regardless of the extraction method and extractant used, both phenolic acids and flavonoids, were determined in all tested extracts. The analysis was carried out using colourimetric and spectrophotometric methods as well as the method of high-performance liquid chromatography. The extracts were analysed for the assessment of their antioxidant activity, which is one of the commonly described properties of phenolic compounds. The obtained results show that the microwave-assisted extraction with water was the most effective for isolation of phenolic compounds and antioxidants. Three types of extraction and five different solvents with different polarity were used to isolate antioxidants, including phenolic compounds. For the first time, the impact of the extraction type and the kind of solvent on the efficiency of antioxidant isolation from freshwater algae was determined. Different types of extraction and extractants were used to isolate these bioactive compounds. This work focuses on the isolation and determination of phenolic compounds from freshwater algae of the species Cladophora glomerata. However, there is little data on the chemical composition of algae obtained from freshwater. This interest is due to the presence of a variety of biologically active compounds that give algae extracts a broad spectrum of biological and functional properties. The growing number of publications proves that these algae are an interesting and essential natural resource. Marine algae biomass has gained widespread interest in the world of science and many industries. ![]()
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