Preparation of turmeric-derived sulfur-functionalized carbon dots: antibacterial and antioxidant activity

Essential oils (EOs) from Citrus are the main by-product of Citrus-processing industries. In addition to food/beverage and cosmetic applications, citrus EOs could also potentially be used as an alternative to antibiotics in food-producing animals. A commercial citrus EO—Brazilian Orange Terpenes (BOT)—was fractionated by vacuum fractional distillation to separate BOT into various fractions: F1, F2, F3, and F4. Next, the chemical composition and biological activities of BOT and its fractions were characterized. Results showed the three first fractions had a high relative amount of limonene (≥10.86), even higher than the whole BOT. Conversely, F4 presented a larger relative amount of BOT’s minor compounds (carvone, cis-carveol, trans-carveol, cis-p-Mentha-2,8-dien-1-ol, and trans-p-Mentha-2,8-dien-1-ol) and a very low relative amount of limonene (0.08–0.13). Antibacterial activity results showed F4 was the only fraction exhibiting this activity, which was selective and higher activity on a pathogenic bacterium (E. coli) than on a beneficial bacterium (Lactobacillus sp.). However, F4 activity was lower than BOT. Similarly, F4 displayed the highest antioxidant activity among fractions (equivalent to BOT). These results indicated that probably those minor compounds that detected in F4 would be more involved in conferring the biological activities for this fraction and consequently for the whole BOT, instead of the major compound, limonene, playing this role exclusively.

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ANTIMICROBIAL AND ANTIOXIDANT EFFECT OF NATURAL EXTRACTS FROM LEAVES, ROOT, STEM AND FLOWERS OF BACCHARIS LATIFOLIA FROM ECUADOR

International Journal of Current Pharmaceutical Research ◽

10.22159/ijcpr.2020v12i2.37495 ◽

2020 ◽

pp. 78-84

Author(s):

FAVIAN BAYAS-MOREJON ◽

ANGELICA TIGRE ◽

RIVELINO RAMON ◽

DANILO YANEZ

Keyword(s):

Antimicrobial Activity ◽

Antioxidant Activity ◽

Potassium Phosphate ◽

Natural Antioxidants ◽

Butylated Hydroxytoluene ◽

Penicillin G ◽

Diffusion Method ◽

E Coli ◽

Antibacterial And Antioxidant Activity

Objective: The increase in chronic and degenerative diseases and the use of synthetic antioxidants such as (butylated hydroxyanisole (BHA) or butylated hydroxytoluene (BHT)) are being restricted because they can be considered carcinogenic. Therefore, there is a growing interest in the search for natural antioxidants, especially from plants, due to their content in different bioactive compounds, such as antioxidants and antimicrobials. To evaluate the antibacterial and antioxidant activity of Baccharislatifolia extracts. Methods: For the determination of the antimicrobial activity of extracts of leaves, root, stem and flowers of Baccharislatifolia (Bl), the disk plate diffusion method was used, the strains of Listeria, Salmonella and E. coli were studied; antibiotics Penicillin G and Ciprofloxacin were the controls. For the antioxidant activity, a solution of H2O2 (Abs at 230 nm) was prepared in Potassium Phosphate Monobasic-Sodium Hydroxide buffer. Results: The antimicrobial activity against Listeria and Salmonella, showed that the extracts of leaves and flowers were more effective with inhibition zones>15 mm and>20 mm respectively. In front of E. coli, the extracts of flowers and stem were the best with zones>7.0 mm. Antibiotics studied inhibited the development of Listeria and Salmonella. However, E. coli isolates were resistant. In the antioxidant activity, the flower extract of Bl in 60 mg/ml presents a higher effect with 47.25%. Conclusion: Bl extracts from leaves and flowers were more efficient both in their antimicrobial and antioxidant capacity.

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Chemical composition, antibacterial and antioxidant activity of essential oil of Eupatorium adenophorum Spreng. from Eastern Uttar Pradesh, India

Food Bioscience ◽

10.1016/j.fbio.2014.06.001 ◽

2014 ◽

Vol 7 ◽

pp. 80-87 ◽

Cited By ~ 16

Author(s):

Abhay K. Pandey ◽

Manindra Mohan ◽

Pooja Singh ◽

Uma T. Palni ◽

N.N. Tripathi

Keyword(s):

Antioxidant Activity ◽

Chemical Composition ◽

Essential Oil ◽

Uttar Pradesh ◽

Eupatorium Adenophorum ◽

Eupatorium Adenophorum Spreng ◽

Eastern Uttar Pradesh ◽

Antibacterial And Antioxidant Activity

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Efficacy of Liquid Protein Hydrolysate from Chicken Feather by Proteus sp. on Chili Plant (Capsicum annum)

Proceedings International ◽

10.33263/proceedings21.043043 ◽

2020 ◽

Vol 2 (1) ◽

pp. 43

Keyword(s):

Antioxidant Activity ◽

Ph Value ◽

Protein Hydrolysate ◽

Nitrogen Sources ◽

Growth Effect ◽

Poultry Waste ◽

Carbon And Nitrogen ◽

Capsicum Annum ◽

Antibacterial And Antioxidant Activity ◽

Test Plants

Huge amounts of feathers are discarded as wastage, and it has always been environmentally concerned as they are difficult to destroy. Feather establishes over 90% protein, which gives it a rigid structure. Biotechnological techniques can help to degrade the feathers and use as biofertilizer. The best strategy is by utilizing keratinase producing keratinolytic microorganisms from the poultry waste to deteriorate the feathers. The poultry sample was collected at the local poultry farm. Using skimmed milk agar, enriched proteolytic bacteria were isolated, and the colony morphology assessed. The isolated bacteria were assessed for keratinolytic ability by using carbon and nitrogen sources. Liquid protein hydrolysate (LPH) was prepared and added as fertilizer to determine the growth effect on Capsicum annum. The antibacterial and antioxidant activity was assessed. The isolated Proteus sp. from the poultry waste has the ability to disintegrate the feathers completely on the 10th day. The enzymatic activity from Proteus sp. was observed increased with the presence of fructose (1.435 U/mL) and yeast extract (2.045 U/mL). The optimum temperature was at 40 °C (0.664 U/mL), pH value 7 (0.871 U/mL), and feather concentration at 1.5% (1.2 U/mL). LPH promoted the growth of Capsicum annum and increased total chlorophyll content (5.7341mg/g) in test plants. The antimicrobial activity displayed that Escherichia coli is susceptible to LPH, and also increased antioxidant activity was demonstrated in the test plants. Thus, the addition of liquid protein hydrolysate exhibited that it has the capability to aid plant development.

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