Study of sorption and bactericidal properties of carbon adsorbents and fullerenes

The introduction of the newest technologies of organic pig breeding has the basic principle of minimizing the use in pigs of chemicals, trace amounts of which in pig production adversely affect the quality of products and the health of consumers. The transition to herbal remedies, the maximum possible rejection of chemical synthesis products, is inhibited, in the main, by the relatively small spectrum of plant compounds with the investigated activity. According to the results of previous studies, six working solutions of Juglans regia L phytosupply extracts - potential phytosine disinfectants were developed: To investigate the bactericidal activity of the experimental preparations of Juglans regia, flushes were made from the internal structures and technological equipment of the housing of the pig stock of the experimental base v. Takhtaulove. Obtained samples of typical banal microflora of the pig complex were mixed to obtain a bacterial-containing suspension averaged over the concentration of microbial bodies and the spectrum of types of microflora in the microbiota. When cultured on nutrient media, with the superficial sowing of a suspension of banal microflora of a pig in the presence of a potential phytodisinfectant, processes of development of individual colonies of the microflora are observed. The amount and intensity of their development, the degree of inhibition of life, assess the level of bactericidal activity of the extracts. The highest bactericidal and fungicidal activity, and consequently, the potential efficacy as a possible disinfectant in the technology of organic pig breeding was revealed by the extracts of phytosupply Juglans regia L No. 2 (extractant - acetic acid to 5 %, nut of wax ripeness) and 4 (extractant, alcohol 20 % nutrient wax ripeness (proven after obtaining the primary extract of up to 5 % alcohol), which have bactericidal properties against gram-positive cocci and gram-negative sticks, but have a weak effect on the spore-forming bacilli. Key words: organic pig breeding, bactericidal activity, phyto-disinfectant, commonplace typical microflora of a pig complex, phyto row materials, walnut extract.

Download Full-text

Formation of the multifunctional metal-polymer composite with antiseptic, anesthetic and bactericidal properties by green technologies

10.1063/1.5046021 ◽

2018 ◽

Author(s):

E. E. Said-Galiev ◽

M. S. Rubina ◽

A. Yu. Vasil’kov ◽

A. V. Naumkin ◽

A. R. Khokhlov ◽

...

Keyword(s):

Polymer Composite ◽

Green Technologies ◽

Bactericidal Properties ◽

Metal Polymer

Download Full-text

Melittin antimicrobial peptide thin layer on bone implant chitosan-antibiotic coatings and their bactericidal properties

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2021.124432 ◽

2021 ◽

Vol 263 ◽

pp. 124432

Author(s):

Vahid Zarghami ◽

Mohammad Ghorbani ◽

Kamran Pooshang Bagheri ◽

Mohammad Ali Shokrgozar

Keyword(s):

Thin Layer ◽

Antimicrobial Peptide ◽

Bone Implant ◽

Bactericidal Properties

Download Full-text

Development and Characterization of Composite Carbon Adsorbents with Photocatalytic Regeneration Ability: Application to Diclofenac Removal from Water

Catalysts ◽

10.3390/catal11020173 ◽

2021 ◽

Vol 11 (2) ◽

pp. 173

Author(s):

Velma Beri Kimbi Yaah ◽

Satu Ojala ◽

Hamza Khallok ◽

Tiina Laitinen ◽

Marcin Selent ◽

...

Keyword(s):

Specific Surface ◽

Surface Area ◽

Functional Groups ◽

Specific Surface Area ◽

Palm Kernel ◽

Hydrothermal Carbonization ◽

Carbon Composite ◽

Carbon Adsorbents ◽

Regeneration Ability ◽

Activation Temperature

This paper presents results related to the development of a carbon composite intended for water purification. The aim was to develop an adsorbent that could be regenerated using light leading to complete degradation of pollutants and avoiding the secondary pollution caused by regeneration. The composites were prepared by hydrothermal carbonization of palm kernel shells, TiO2, and W followed by activation at 400 °C under N2 flow. To evaluate the regeneration using light, photocatalytic experiments were carried out under UV-A, UV-B, and visible lights. The materials were thoroughly characterized, and their performance was evaluated for diclofenac removal. A maximum of 74% removal was observed with the composite containing TiO2, carbon, and W (HCP25W) under UV-B irradiation and non-adjusted pH (~5). Almost similar results were observed for the material that did not contain tungsten. The best results using visible light were achieved with HCP25W providing 24% removal of diclofenac, demonstrating the effect of W in the composite. Both the composites had significant amounts of oxygen-containing functional groups. The specific surface area of HCP25W was about 3 m2g−1, while for HCP25, it was 160 m2g−1. Increasing the specific surface area using a higher activation temperature (600 °C) adversely affected diclofenac removal due to the loss of the surface functional groups. Regeneration of the composite under UV-B light led to a complete recovery of the adsorption capacity. These results show that TiO2- and W-containing carbon composites are interesting materials for water treatment and they could be regenerated using photocatalysis.

Download Full-text

ChemInform Abstract: NEW MANNICH BASES FROM 5-(METHYLPHENOXYMETHYL)-1,3,4-OXADIAZOLE-2-THIONE DERIVATIVES AND THEIR BACTERICIDAL PROPERTIES

Chemischer Informationsdienst ◽

10.1002/chin.197845198 ◽

1978 ◽

Vol 9 (45) ◽

Author(s):

A. K. SENGUPTA ◽

O. P. BAJAJ

Keyword(s):

Mannich Bases ◽

Bactericidal Properties

Download Full-text

Transformed tissue of Dionaea muscipula J. Ellis as a source of biologically active phenolic compounds with bactericidal properties

Applied Microbiology and Biotechnology ◽

10.1007/s00253-021-11101-8 ◽

2021 ◽

Vol 105 (3) ◽

pp. 1215-1226

Author(s):

Wojciech Makowski ◽

Aleksandra Królicka ◽

Anna Nowicka ◽

Jana Zwyrtková ◽

Barbara Tokarz ◽

...

Keyword(s):

Phenolic Compounds ◽

Phenolic Acids ◽

Antibacterial Properties ◽

Biologically Active ◽

Plant Genome ◽

Resistant Bacteria ◽

Shoot Cultures ◽

Transformed Plants ◽

Dionaea Muscipula ◽

Bactericidal Properties

Abstract The Venus flytrap (Dionaea muscipula J. Ellis) is a carnivorous plant able to synthesize large amounts of phenolic compounds, such as phenylpropanoids, flavonoids, phenolic acids, and 1,4-naphtoquinones. In this study, the first genetic transformation of D. muscipula tissues is presented. Two wild-type Rhizobium rhizogenes strains (LBA 9402 and ATCC 15834) were suitable vector organisms in the transformation process. Transformation led to the formation of teratoma (transformed shoot) cultures with the bacterial rolB gene incorporated into the plant genome in a single copy. Using high-pressure liquid chromatography, we demonstrated that transgenic plants were characterized by an increased quantity of phenolic compounds, including 1,4-naphtoquinone derivative, plumbagin (up to 106.63 mg × g−1 DW), and phenolic acids (including salicylic, caffeic, and ellagic acid), in comparison to non-transformed plants. Moreover, Rhizobium-mediated transformation highly increased the bactericidal properties of teratoma-derived extracts. The antibacterial properties of transformed plants were increased up to 33% against Staphylococcus aureus, Enterococcus faecalis, and Escherichia coli and up to 7% against Pseudomonas aeruginosa. For the first time, we prove the possibility of D. muscipula transformation. Moreover, we propose that transformation may be a valuable tool for enhancing secondary metabolite production in D. muscipula tissue and to increase bactericidal properties against human antibiotic-resistant bacteria. Key points • Rhizobium-mediated transformation created Dionaea muscipula teratomas. • Transformed plants had highly increased synthesis of phenolic compounds. • The MBC value was connected with plumbagin and phenolic acid concentrations.

Download Full-text

Assess the Effectiveness of protective Concrete coatings of microbiological sulfuric acid Aggression

E3S Web of Conferences ◽

10.1051/e3sconf/20199702022 ◽

2019 ◽

Vol 97 ◽

pp. 02022

Author(s):

Viktor Sopov ◽

Julia Danchenko ◽

Ekaterina Latorez

Keyword(s):

Sulfuric Acid ◽

Building Structures ◽

Predominant Role ◽

Microbiological Processes ◽

Repair Materials ◽

Bactericidal Properties ◽

Mineral Acids ◽

Concrete Building ◽

Modified Epoxy

Specification of corrosion processes in sewerage networks, the predominant role of microbiological processes in them requires the protection of concrete with materials resistant to specific biogenic sulfuric acid aggression. The effective protective materials, in this case, are those that, in addition to acid-proofing materials, have bactericidal properties. Polymer composite materials (PCM) of cold curing based on modified epoxy-resin, resins with dispersed oxides as fillers are widely used in construction. Unique properties and simple technologies make it possible to use them as injection formulations for repair, restoration and restoration of building structures and structures, waterproofing and facing materials, for impregnating, gluing and coating metal, wooden, brick and concrete building structures and parts. In the reconstruction and restoration of sewerage collectors operating under conditions of exposure to liquid biochemically aggressive media with mineral acids and organic substances, particular attention is paid to the permeability of repair materials. Based on the results of the study, PCM compositions were chosen whose estimated lifetime is about 20 years, ensuring reliable protection of the sewage collectors from corrosion.

Download Full-text

Propane selective carbon adsorbents from phenolic resin precursor

Microporous and Mesoporous Materials ◽

10.1016/j.micromeso.2021.111071 ◽

2021 ◽

pp. 111071

Author(s):

Márcia Andrade ◽

Andrew J. Parnell ◽

Gabriel Bernardo ◽

Adélio Mendes

Keyword(s):

Phenolic Resin ◽

Carbon Adsorbents

Download Full-text