Tomatoes are well-known vegetables, grown and eaten around the world due to their nutritional benefits. The aim of this research was to determine the chemical composition (dry matter, soluble solids, titritable acidity, vitamin C, lycopene), the taste index and maturity in three cherry tomato varieties (Sakura, Sunstream, Mathew) grown and collected from greenhouse at different stages of ripening. The output of the analyses showed that there were significant differences in the mean values among the analysed parameters according to the stage of ripening and variety. During ripening, the content of soluble solids increases on average two times in all analyzed varieties; the highest content of vitamin C and lycopene was determined in tomatoes of Sunstream variety in red stage. The highest total acidity expressed as g of citric acid 100 g-1 was observed in pink stage (variety Sakura) or a breaker stage (varieties Sunstream and Mathew). The taste index of the variety Sakura was higher at all analyzed ripening stages in comparison with other varieties. This shows that ripening stages have a significant effect on tomato biochemical composition along with their variety.

Worldwide it is of great interest to find new and safe antioxidants from natural sources. Green leafy vegetables and wild plant leaves are healthy nutrients, containing vitamins, minerals and biological active compounds, therefore these plants provide beneficial health effects due to the presence of antioxidant compounds. It is useful and popular to supplement human diets with fresh or frozen edible plants. It is known that freezing may help to preserve the quality of plants, and is superior to other preservation methods. The aim of research was to compare the phenolic compounds content of fresh and frozen edible wild plants leaves grown in Latvia. The samples were processed using freezing -20 °C and for a comparison fresh samples were analysed. The leaves of stinging nettle (Urtica dioica), common goutweed (Aegopodium podagraria), dandelion (Taraxacum officinale) and chickweed (Stellaria media) were collected in May 2016 in Latvia. In the current research the content of total phenolics was determined in four types of fresh and frozen plant leaves and they can be arranged as follows (starting from plant with less phenolics content as gallic acid equivalent): dandelion

Straipsnyje yra analizuojamos aplinkos apsaugos politikos ištakos ir jos raida įvairiais Lietuvos istoriniais laikotarpiais. Darbe yra aptariamos Pirmosios Lietuvos Respublikos aplinkos apsaugos politikos užuomazgos, diskutuojami įvairūs požiūriai ar tai buvo politikos pradžia, ar tik klasikinė aplinkosauga. Taip pat yra vertinamas sovietinio valdymo laikotarpis, kai buvo priimtas Gamtos apsaugos įstatymas, kuris pradėjo teisiškai reglamentuoti aplinkosaugą ir nustatė pirmus svarbiausius aplinkos apsaugos valdymo principus. Remiantis aplinkosaugos specialistų nuomone yra aptariami pirmieji atkurtos Lietuvos Respublikos nepriklausomybės metai, kai teisiškai buvo nustatyti svarbiausi aplinkos apsaugos valdymo politikos principai. Vėlesniais metais aplinkos apsaugos politika buvo formuojama ne tik teisės aktų pagalba, bet patvirtinus Valstybinę aplinkos apsaugos strategiją bei Nacionalinę aplinkos apsaugos strategiją. Šios strategijos suformavo svarbiausius Lietuvos aplinkos apsaugos politikos principus. Straipsnyje taip pat yra aptariama aplinkos apsaugos politikos samprata, pateikiami skirtingi į ją požiūriai.

Tomato is known as a vegetable with several health benefits due to its high level of bioactive compounds, especially lycopene, phenolics, and vitamin C. The effect of tomato variety and stage of maturity on the bioactive compounds concentration was studied. Ten tomato varieties were grown and collected from a greenhouse at two different stages of ripening. The obtained results showed that there were significant differences in the mean values between analysed parameters according to the stage of ripening and variety. The highest concentration of vitamin C was determined for variety Sakura F1 at maturity stage, and the lowest for variety Sunstreem F1 for unripe fruits. The concentration of phenols and flavonoids increased during tomato ripening and the highest rate was observed for variety Naget F1 (from 7.86 mg·100g−1to 14.34 mg·100 g−1(phenols) and flavonoids from 6.09 mg·100 g−1to 10.03 mg·100 g−1. The concentration of lycopene in the unripe stage was low (mostly about 1 mg·100 g−1) and the most quantitative changes and the highest concentration of lycopene in full maturity stage was determined for variety SV0946TS (27.11 mg·100 g−1) and variety NectarF1 (16.81 mg·100 g−1).

Phenolic compounds are of a considerable interest and have received more and more attention in recent years due to their bioactive functions. These components are known as secondary plant metabolites and also possess antimicrobial, antiviral and anti-inflammatory properties. The popular Latvian herbals – Calendula (Calendula officinalis L.), Lady’s-mantle (Alchemilla vulgaris L.), Yarrow (Achillea millefolium L.), Peppermint (Mentha × piperita L.) and Bellis (Bellis perennis L.) – are widely used for herbal teas. The objective of this study was to determine individual phenolic compounds in herbal infusions using high-performance liquid chromatography. The obtained results showed significant differences (p ˂ 0.05) of the phenolics content in the analysed herbal teas. The total content of the identified 14 phenolic compounds in Yarrow tea was on the average 136.76 ± 0.8 mg 100 g–1, in Peppermint tea 304.38 ± 10.7 mg 100 g–1, in Lady’s-mantle tea 319.53 ± 12.5 mg 100 g–1, in Calendula tea 586.36 ± 17.6 mg 100 g–1, but in Bellis tea it was 802.96 ± 21.3 mg 100 g–1. The dominant phenolic compound in Peppermint, Lady’s-mantle and Yarrow teas was rutin, but chlorogenic acid in Bellis tea. Calendula tea has an abundant quantity of sinapic acid.