What is the best extraction encapsulation and application of essential oils agains fungi?5 answersThe best extraction, encapsulation, and application method for essential oils against fungi involves utilizing encapsulation techniques to enhance stability and efficacy. Encapsulation methods such as emulsification, nanofibers, and mesoporous silica particles with chitosan coating have shown promising results in improving the antifungal activity of essential oils. These techniques help protect essential oils from factors like high volatility, UV sensitivity, and fast oxidation, which can limit their effectiveness. Encapsulation in materials like unmodified cellulose, poly (acid lactic), and yeast particles allows for controlled release, stability, and sustained antifungal properties. By encapsulating essential oils in these innovative carriers, their bioactivity against fungi, such as Fusarium species, can be significantly enhanced, offering a natural and environmentally friendly alternative for agricultural and food industry applications.
What is the optimal concentration of yeast extract for the growth of S. boulardii?5 answersThe optimal concentration of yeast extract for the growth of S. boulardii is 2%.
What are the ways to cultivate bacteria in the laboratory?5 answersBacteria can be cultivated in the laboratory using various methods. One common method is to culture bacteria on agar plates. Agar plates provide a solid surface for bacteria to grow and can be supplemented with specific nutrients to support the growth of different types of bacteria. Another method is selective plating, where specific culture media are used to isolate and separate different types of bacteria. This method allows researchers to study interactions between different types of bacteria. Additionally, metagenomic techniques can be used to study bacterial communities in underexplored environments, but culture-dependent methods are still important for the discovery of new products and enzymes from marine bacteria. These methods involve promoting the growth of bacteria from environmental samples using agar plate techniques and laboratory conditions. Overall, these culture methods are fundamental for researchers studying bacteria and their behavior in order to develop strategies for nurturing beneficial bacteria and combating disease-causing bacteria.
How to make nano powder from extract?5 answersTo make nano powder from extract, several methods and devices can be used. One approach involves using a device that includes a stirring and mixing device, a grinding device, a high-speed cutting device, a high-pressure homogenizer, and a spray drying device. Another method utilizes equipment consisting of a stirring and mixing device, a ball mill, a dispersing and mixing device, a high-pressure equalizing and emulsifying device, a cavitating and jetting device, and a spraying and drying device. Additionally, a device can be used that includes a stirring and material mixing device, a rough smashing device, a high-pressure homogeneous emulsification device, a cavitating jet device, and a drying device. These devices and methods allow for the preparation of nano powder from various extracts, such as ginseng, gingko, and ginkgo biloba, by employing techniques such as smashing-emulsifying and atomizing.
Looking for reviews on the use of yeast extracts as plant fertilizer?5 answersYeast extracts have been studied as potential plant fertilizers, with positive impacts on nutritional parameters observed in various plant groups. Yeasts have been found to provide soluble nutrients, produce organic acids and phytohormones, and act as biocontrol agents and soil bioremediating agents, making them useful in the creation of quality biofertilizers and biopesticides. Yeast suspensions have been shown to enhance the nutritional content of agricultural products, although the experimental designs in the studies varied, making evaluation of methodologies difficult. Yeast extracts have also been found to promote the growth of rose plants, with an optimal concentration of 5 g/L of dry yeast extraction resulting in increased vegetative growth. Yeasts isolated from the phyllosphere and rhizosphere of plants have exhibited plant growth-promoting traits, suggesting their potential use as plant biofertilizers.
Does yeast extract prevent the formation of halo zone in Pikovskaya agar?3 answersYeast extract does not prevent the formation of a halo zone in Pikovskaya agar. The invention described infocuses on the development of a nutrient medium for the selective isolation and identification of yeasts, particularly species of the Candida genus. The medium contains specific fluorogenic and/or chromogenic substrates to detect enzymatic activity, as well as substances containing proteins to detect proteolytic activity. However, there is no mention of the medium's effect on the formation of a halo zone in Pikovskaya agar. Similarly, the high-throughput halo assay protocol described inuses yeast as a seeding agent, but it does not mention the use of yeast extract or its impact on the formation of a halo zone. Therefore, based on the available information, there is no evidence to suggest that yeast extract prevents the formation of a halo zone in Pikovskaya agar.