The vibratory feeders with electromagnetic excitation called electromagnetic vibratory feeders (EMVF)

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This study aimed at investigating biological activity and chemical composition of Satureja kitaibelii Wierzb. ex Heuff. LC-PDA/MS analyses for the aqueous (A1-ste, leaves and flowers, A2-leves and flowers) and ethyl-acetate (E1-stem, leaves and flowers, E2-leaves and flowers) extracts obrtained by ultrasound-assisted extraction allowed the identification of thirty four compounds. Quantitative analysis revealed that the aqueous extract obtained from leaves and flowers was the richest in total phenolic acids (65.36 mg/g) and flavonoids (21.17 mg/g). Total polyphenol content was the highest in the aqueous extract obtained from leaves and flowers (27±2.4 mg Gallic Acid equivalents /g). The best antioxidant activity was observed for the same extract using the DPPH (SC50 20±10 µg/mL), ABTS (2.834±0.02 mg Ascorbic Acid/g), FRAP (1.922±0.03 mmol Fe2+/mg), and total reducing power tests (16.4±1.0 mg Ascorbic Acid/g). Both ethyl acetate extracts were the most active against strains of Bacillus cereus and Micrococcus flavus (MIC 1.70-1.99 mg/mL and 1.99-3.41 mg/mL, respectively). They were more efficient against Aspergillus ochraceus (MFC 0.86 mg/mL) and towards HeLa cell lines. All obtained results implied the good potential of investigated extracts to be used as an effective preservatives and functional ingredients in food products and dietary supplements.

Honey mushroom, <i>Armillaria mellea</i>, is an edible and medicinal lignicolous basidiomycete. In this study, we investigated the chemical composition and bioactive properties of its methanolic and acetonic extracts. The chemical characterization of extracts was done with the HPLC-DAD-MS/MS method. The results showed that potassium was the most abundant mineral; chlorogenic acid was the most abundant polyphenol; malic acid was the most abundant organic acid; and among carbohydrates, the most abundant were sorbitol, glucose, fructose, and saccharose. Antioxidative activity was assessed by DPPH (IC₅₀ of the methanolic extract was 608.32 &mu;g/mL and of the acetonic extract 595.71 &mu;g/mL) and reducing power assays (the results ranged between 0.034 and 0.102 &mu;g/mL). Total phenolic content was determined as gallic acid equivalent (methanolic extract: 4.74 mg GAE/g; acetonic extract: 5.68 mg GAE/g). The microdilution assay was used to evaluate the antimicrobial activity of the extracts, and the results ranged from 1.25 to 20 mg/mL. The antidiabetic effect of the extracts was tested by the &alpha;-amylase (the results ranged from 34.90&#37; to 41.98&#37;) and &alpha;-glucosidase assays (the results were in the range of 0.55-2.79&#37;). The neuroprotective activity was explored by the acetylcholinesterase inhibition assay (the results were in the range of 1.94-7.76&#37;). The microtetrazolium assay was used to investigate the cytotoxic activity of the extracts (the IC₅₀ values ranged from 212.06 to &#62; 400 &mu;g/mL). Although some results suggest that some activities of the extracts are relatively moderate, the honey mushroom can still be considered an excellent source of food and bioactive compounds with medicinal value.

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