Search results for "Herb"
showing 6 items of 856 documents
Doslidžennâ bìologìčnoï aktivnostìvtorinnogo ekstraktu zì šrotu travimaterinki zvičajnoï (Origanum vulgare)
2015
Studied the antimicrobial activity of secondary extract from oregano herbs waste (Origanum vulgare)against 7 standard test strains of microrganisms. Minimum bactericidal concentration of the extract to Staphylococcus aureus ATCC 6538 P-is 3.125-6.25 mg/ml and 6.25-12.5 mg/ml to gram-negative bacteria and Candida albicans ATCC 10231.Total antioxidant activity determined by DPPH, secondary extract at a concentration of 400 ug/ml was 92 %. The tested extract had photoprotective activity. Obtained results confirm the perspective of using waste of oregano herbs for making extracts and creation on their basis of pharmaceuticals, veterinary drugs and cosmetics.
Herbicidal activity of essential oils extracted from different Eucalyptus and Citrus species against Avena fatua
2018
Weeds are a serious threat for crop yield and quality since they compete for water, light, soil nutrients and space. Avena fatua L. is one of the ten worst annual weeds of temperate agricultural regions of the world. It could reduce annual crop yields by as much as 70%. The main traits of this species include high fecundity, self-pollination, and variable degrees of primary seed dormancy. A. fatua is in the 4th position of herbicide resistant weeds in the word. It has developed resistance to eight different modes of action. .. The European legislation also supports weed control by means of Integrated Pest Management. It is important to manage A. fatua interference preventing environmental p…
Ginger and Turmeric Essential Oils for Weed Control and Food Crop Protection
2019
Ginger and turmeric are two food ingredients that are in high demand due to their flavor and positive effects on health. The biological properties of these spices are closely related to the aromatic compounds they contain. The chemical compositions of their essential oils and their in vitro phytotoxic activity against weeds (Portulaca oleracea, Lolium multiflorum, Echinochloa crus-galli, Cortaderia selloana, and Nicotiana glauca) and food crops (tomato, cucumber, and rice) were studied. Forty-one compounds, accounting for a relative peak area of 87.7% and 94.6% of turmeric and ginger essential oils, respectively, were identified by Gas Chromatography&ndash
Zanieczyszczenie metalami ciężkimi Matricaria chamomilla L. i Plantago lanceolata L
2019
Celem badań była ocena zanieczyszczenia metalami ciężkimi (Mn, Fe, Ni, Cu, Zn, Cd i Pb) rumianku lekarskiego (Matricaria chamomilla L.) i babki lancetowatej (Plantago lanceolata L.). W ramach biomonitoringu pasywnego pobrano próbki roślin leczniczych oraz próbki gleby, na której rosły rośliny. Metale ciężkie oznaczono za pomocą absorpcyjnej spektrometrii atomowej (AAS). Na podstawie przeprowadzonych badań można stwierdzić, że zioła wykorzystane do badań różniły się pod względem stężeń metali ciężkich w zależności od miejsca ich pobierania. Wszystkie próbki ziół były zanieczyszczone wysokimi stężeniami manganu, żelaza oraz cynku. Badane próbki gleb z grupy B i C według rozporządzenia ministr…
Terrestrial carbohydrates support freshwater zooplankton during phytoplankton deficiency
2016
Article
Voldemar Langenfeld's list of Malus Mill. herbaria
2023
Veicot ābeļu ģints (Malus Mill.) sistemātiku, tās morfoloģijas, evolūcijas un filoģenēzes pētniecību, profesors Voldemārs Langenfelds (1923 – 2007) ir izveidojis vairāk kā 600 lapu lielu ābeļu herbāriju. Herbāriji ievākti laikā no 1956. līdz 1969. gadam Latvijā un ārpus tās robežām. 1990. gadu beigās zinātnieks šo herbāriju nodeva Latvijas Universitātes Muzejam un tie glabājas Botānikas un mikoloģijas kolekcijās. Lielākā daļa (407) ir iekļauti kolekcijā Herbarium Latvicum (RIG II), pārējie – Herbarium Generale, 29 herbāriji atrodas ārpus minētajām kolekcijām. Šajos sarakstos sniegti dati par visiem V. Langenfelda ābeļu herbārijiem, kas glabājas LU Muzejā.