scholarly journals Prospects of the Use of New Carbon Sorbents with Antimicrobial Properties in the Intensive Care Medicine

2019 ◽  
Vol 15 (1) ◽  
pp. 54-69
Author(s):  
V. T. Dolgikh ◽  
V. A. Likholobov ◽  
V. V. Moroz ◽  
L. G. P'yanova ◽  
T. I. Dolgikh ◽  
...  

The purpose is to study antibacterial and antimycotic properties of produced granular carbon sorbents. Material and methods. A VNIITU-1 carbon sorbent was used as a starting material, which was modified with polyvinylpyrrolidone and lactic and glycolic acids oligomers. Microbiological bench tests were carried out to determine the antibacterial and antimycotic activity of these granulated carbon hemosorbents. Antibacterial properties of sorbents were studied in relation to pathogenic and conditionally pathogenic microorganisms: Staphylococcus aureus, Pseudomonas aeroginosa, Klebsiella pneumonia, Escherichia coli, Streptococcus agalactiae as well as their mixtures: mixture No. 1 — S. aureus and E. coli; mixture No. 2 — S. aureus and P. aeruginosa. Results. Presented data demonstrate that the modified VNIITU-1 exhibits significant antibacterial and antimycotic activity against most of the studied microorganisms compared to original sorbent.  Conclusion. Modified sorbents as antimicrobial and detoxifying drugs may further be employed in treatment of obstetrical-gynecological and surgical diseases. The carbon sorbents are promising materials for medicine, as they expand the potential of sorption therapy in clinical practice.

Author(s):  
В.Т. Долгих ◽  
Л.Г. Пьянова ◽  
Т.И. Долгих ◽  
В.А. Лихолобов ◽  
О.В. Корпачева ◽  
...  

Цель исследования - изучение антибактериальной активности гранулированных углеродных сорбентов по отношению к патогенной микрофлоре в условиях различной продолжительности контакта с сорбентом. Методика. Исследовали антибактериальные свойства гранулированного сорбента ВНИИТУ-1, обработанного гидромеханически, окисленного и стабилизированного до нормативных значений рН и модифицированного поли-N-винилпирролидоном (ПВП) ВНИИТУ-1 по отношению к патогенным микроорганизмам: Staphylococcus aureus, Pseudomonas aeroginosa, Klebsiella pneumonia, Escherichia coli, Streptococcus agalactiae, а также к их смесям. Все микроорганизмы представляли собой клинические штаммы, выделенные из ран пациентов. Предварительно тест-микроорганизмы были исследованы на чувствительность к современным антибиотикам. Опытным путем подбирали такие разведения и количество засеваемого материала, чтобы выросшие на чашке Петри колонии можно было сосчитать. Бактерии сорбировали из физиологического раствора с концентрацией микробных клеток 3 х 10 колониеобразующих единиц в 1 мл исследуемой пробы (КОЕ/мл). В пробирку типа Эппендорф вносили сорбент в количестве 0,5 мл, добавляли 1 мл микробной взвеси, встряхивали для удаления пузырьков воздуха и выдерживали в термостате в течение 1, 3, 6 и 24 ч. По истечении заданного времени контакта сорбента с патогенной микрофлорой отбирали надосадочную жидкость в объеме 100 мкл, засевали на стерильные агаровые пластины чашек Петри с питательной средой ГМФ-агар. Засеянные чашки Петри помещали в СО-инкубатор 15АС (Япония) вверх дном и инкубировали при температуре 37 ± 1°С в течение 24 ± 2 ч. При подсчете колоний, выросших на чашке Петри, учитывали только те чашки, на которых выросло более 300 изолированных колоний. Результаты. Гранулированный сорбент ВНИИТУ-1 обладает антибактериальным действием в отношении как грамположительных, так и грамотрицательных бактерий, а также их смеси. Сроки проявления антибактериального эффекта сорбента зависят от вида микроорганизмов и времени их контакта с образцом. Присутствие в составе сорбента модификатора ПВП усиливает его антибактериальные свойства. Полимермодифицированный образец обладает пролонгированным антибактериальным эффектом в отношении широкого спектра микроорганизмов (E. coli, St. aureus, P. aeruginosae и St. aureus) и смеси их культур. Заключение. Показана возможность повышения антибактериальных свойств гранулированных углеродных сорбентов по отношению к патогенной микрофлоре путем их модификации поли-N-винилпирролидоном. Дальнейшая разработка и применение углеродных сорбентов как средств сорбционной терапии является перспективным подходом к местному лечению гнойных ран. The purpose: Study the antibacterial activity of granulated carbon sorbents in relation to the pathogenic microflora under the conditions of different period of contact with sorbent. Methods. It has been investigated the antibacterial properties of VNIITU-1 granulated sorbent, which was hydromechanically treated, oxidized and stabilized up to pH standard parameters and VNIITU-1 modified poly-N-vinylpyrrolidone (PVP) against the pathogenic micro-organisms, including Staphylococcus aureus, Pseudomonas aeroginosa, Klebsiella pneumonia, Escherichia coli, Streptococcus agalactiae, and their mixes. All bacteria were clinical strains derived from the wounds of patients. Dilutions and amount of inoculated material were experimentally selected for further calculation of the grown colonies on the Petri dish. Bacteria were sorbed from the saline solution with bacteria concentration of 3 х 10 of the colony forming units in 1 ml of test sample (CFU/ ml). Eppendorf tube was added the sorbent 0.5 ml and bacterial suspension 1 ml; then the tube was shaken to remove the air bubbles and incubated for 1, 3, 6 and 24 hr. Upon the expiry of the target time for sorbent with pathogenic flora contact the supernatant fluid was collected in 100 ul and inoculated on the sterile agar plates of the Petri dishes with GMF agar nutrient medium. Inoculated Petri dishes were placed upside down in СО incubator 15AC (Japan) and incubated at 37 ± 1°C for 24 ± 2 hours. When counting the colonies growing on the Petri dish, they took into consideration only the dishes where more than 300 isolated colonies were grown. If more than 300 colonies were grown, «> 3x102 CFU/ml» was recorded in the protocol. Results. Granulated sorbent VNIITU-1 has an antibacterial effect against both gram-positive and gram-negative bacteria, and their mixes. Time period for manifestations of the sorbent antibacterial effect depends on the type of microorganisms and time of contact. PVP presence in sorbent composition enhances the antibacterial effect of the sorbent. Resin-modified sample has a prolonged antibacterial effect against a broad spectrum of microorganisms (E. coli, St. aureus, P. aeruginosae and St. aureus) and mixtures of their cultures. Conclusion. It has been determined the possibility for increasing of antibacterial properties of granulated carbon sorbents against the pathogenic microflora by their modification with poly-N-vinylpyrrolidone. Further development and application of carbon sorbents as the means for sorption therapy is a perspective approach for the local treatment of purulent wounds.


2014 ◽  
Vol 50 (74) ◽  
pp. 10819-10822 ◽  
Author(s):  
Komala Pandurangan ◽  
Jonathan A. Kitchen ◽  
Salvador Blasco ◽  
Francesca Paradisi ◽  
Thorfinnur Gunnlaugsson

The development of a family of twelve aryl pyridyl ureas, their crystallography and the ability of a number of these to form hydrogen bonding supramolecular gels with antimicrobial properties are described.


Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2704
Author(s):  
Anna V. Abramova ◽  
Vladimir O. Abramov ◽  
Igor S. Fedulov ◽  
Alexander E. Baranchikov ◽  
Daniil A. Kozlov ◽  
...  

Flexible materials, such as fabric, paper and plastic, with nanoscale particles that possess antimicrobial properties have a significant potential for the use in the healthcare sector and many other areas. The development of new antimicrobial coating formulations is an urgent topic, as such materials could reduce the risk of infection in hospitals and everyday life. To select the optimal composition, a comprehensive analysis that takes into account all the advantages and disadvantages in each specific case must be performed. In this study, we obtained an antimicrobial textile with a 100% suppression of E. coli on its surface. These CeO2 nanocoatings exhibit low toxicity, are easy to manufacture and have a high level of antimicrobial properties even at very low CeO2 concentrations. High-power ultrasonic treatment was used to coat the surface of cotton fabric with CeO2 nanoparticles.


Biology ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 219
Author(s):  
Oluyomi Stephen Adeyemi ◽  
Chinemerem Ebugosi ◽  
Oghenerobor Benjamin Akpor ◽  
Helal F. Hetta ◽  
Sarah Al-Rashed ◽  
...  

The search for new and better antimicrobial therapy is a continuous effort. Quercetin is a polyphenol with promising antimicrobial properties. However, the understanding of its antimicrobial mechanism is limited. In this study, we investigated the biochemical mechanistic action of quercetin as an antibacterial compound. Isolates of Bacillus subtilis, Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumonia, and Staphylococcus aureus were initially exposed to quercetin for antibacterial evaluation. Subsequently, S. aureus (Gram-positive) and E. coli (Gram-negative) cells were exposed to quercetin with or without ascorbic acid, and cells were harvested for selected biochemical assays. These assays included redox homeostasis (lipid peroxidation, total thiol, total antioxidant capacity), nitric oxide, and kynurenine concentration as well as DNA fragmentation. The results revealed that quercetin caused lipid peroxidation in the bacterial isolates. Lipid peroxidation may indicate ensuing oxidative stress resulting from quercetin treatment. Furthermore, tryptophan degradation to kynurenine was activated by quercetin in S. aureus but not in E. coli, suggesting that local L-tryptophan concentration might become limiting for bacterial growth. These findings, considered together, may indicate that quercetin restricts bacterial growth by promoting oxidative cellular stress, as well as by reducing the local L-tryptophan availability by activating the kynurenine pathway, thus contributing to our understanding of the molecular mechanism of the antimicrobial action of quercetin.


Author(s):  
Jayanta Sarma ◽  
Gurvinder Singh ◽  
Mukta Gupta ◽  
Reena Gupta ◽  
Bhupinder Kapoor

Objective: The synthesis of novel benzimidazole-hydrazone derivatives has been carried out based on the previous findings that both these pharmacophores possess potent antimicrobial activities. The antibacterial properties of synthesized derivatives were screened against both Gram-positive and Gram-negative bacteria.Methods: O-phenylenediamine on condensation with substituted aromatic acids in polyphosphoric acid gave benzimidazole nucleus which on reaction with ethyl chloroacetate and hydrazine hydrate in two different steps resulted in the formation of substituted acetohydrazides. The targeted compounds 6a-l were synthesized by reaction of substituted acetohydrazides with aromatic aldehydes and screened for their antibacterial potential by cup-plate method.Results: The synthesized benzimidazole-hydrazones exhibited moderate to strong antibacterial activities against Staphylococcus aureus, Bacillus subtilis, Escherichia coli, and Pseudomonas aeruginosa. The compounds 6a-6f were found to be most effective against S. aureus, E. coli, and P. aeruginosa. Among all the synthesized compounds, the zone of inhibition of 6f in highest concentration, i.e., 100 μg/ml were found to be >31 mm against all the stains of bacteria.Conclusion: The antibacterial results revealed that the synthetized derivatives have significant antimicrobial properties and further structure activity relationship studies may develop more potent and less toxic molecules.


2021 ◽  
Vol 12 ◽  
Author(s):  
Amir Ali Anvar ◽  
Hamed Ahari ◽  
Maryam Ataee

Food products contaminated by foodborne pathogens (bacteria, parasites, and viruses) cause foodborne diseases. Today, great efforts are being allocated to the development of novel and effective agents against food pathogenic microorganisms. These efforts even might have a possible future effect in coronavirus disease 2019 (COVID-19) pandemic. Nanotechnology introduces a novel food packaging technology that creates and uses nanomaterials with novel physiochemical and antimicrobial properties. It could utilize preservatives and antimicrobials to extend the food shelf life within the package. Utilizing the antimicrobial nanomaterials into food packaging compounds typically involves incorporation of antimicrobial inorganic nanoparticles such as metals [Silver (Ag), Copper (Cu), Gold (Au)], and metal oxides [Titanium dioxide (TiO2), Silicon oxide (SiO2), Zinc oxide (ZnO)]. Alternatively, intelligent food packaging has been explored for recognition of spoilage and pathogenic microorganisms. This review paper focused on antimicrobial aspects of nanopackaging and presented an overview of antibacterial properties of inorganic nanoparticles. This article also provides information on food safety during COVID-19 pandemic.


2020 ◽  
Vol 16 ◽  
Author(s):  
Arfaa Sajid ◽  
Qaisar Manzoor ◽  
Anam Sajid ◽  
Muhammad Imran ◽  
Shanza Khalid ◽  
...  

Background:: Currently, developing methods for the formation of nanoparticles with antimicrobial properties based on green chemistry are the research hotspots. In this research green biosynthesis of Eriobotrya japonica extract loaded silver nanoparticles and their characterization were the main objectives to achieve. Methods:: Green synthesis of E. japonica leaves extract-loaded silver nanoparticles (AgNPs) was carried out and its effect on bacterial growth was examined. The reduction of silver ions in solution was observed using UV-Vis spectrophotometer. The properties of AgNPs were assessed using Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Also, their antibacterial effects were checked against Staphylococcus aureus and Escherichia coli. Results:: It was revealed that 5-50 nm sized spherical to elongated nanoparticles were synthesized that possessed comparatively better antibacterial potential against E. coli and S. aureus than conventional extract of the E. japonica leaves. Conclusions:: Green synthesis and effective utilization of Eriobotrya japonica extract loaded silver nanoparticles is a promising approach for nanoparticle production avoiding negative environmental impacts.


2013 ◽  
Vol 796 ◽  
pp. 148-151
Author(s):  
Hong Chao Miao ◽  
Wei Shen ◽  
Cai Di Xu

The researchers of liquid detergent are most focused on detergency in the past, and the research on antibacterial activity of liquid detergent is rare. This research choose famous and common brands liquid laundry detergent in the market and studied their antimicrobial properties, test their antibacterial properties on the surface of the natural fiber fabric about Staphylococcus aureus (positive) and Escherichia coli (negative), analysis the antibacterial effect of the various brands, and the consumers have more reliable basis for purchase such goods. The antibacterial rate of liquid detergent against Galanz negative bacteria (E. coli) is generally higher, but the antibacterial rate against Galanz positive bacteria (S.aureus) is not good. The brand of Lan Yue Liang has excellent performance in this experiment, the antibacterial rate against E. coli and S.aureus reached to 96.25% and 95%.


2020 ◽  
Vol 11 ◽  
pp. 1119-1125
Author(s):  
Mohammad Jaber ◽  
Asim Mushtaq ◽  
Kebiao Zhang ◽  
Jindan Wu ◽  
Dandan Luo ◽  
...  

The control over contagious diseases caused by pathogenic organisms has become a serious health issue. The extensive usage of antibiotics has led to the development of multidrug-resistant bacterial strains. In this regard, metal-oxide-based antibacterial nanomaterials have received potential research interest due to the efficient prevention of microorganism growth. In this study, splat-shaped Ag–TiO2 nanocomposites (NCs) were synthesized on the gram scale and the enhanced antibacterial properties of TiO2 in the presence of silver were examined. The formation of Ag–TiO2 NCs was analyzed through various characterization techniques. The cell viability experimental results demonstrated that the Ag–TiO2 NCs have good biocompatibility. The antibacterial activity of the prepared Ag–TiO2 NCs was tested against the Gram-positive Staphylococcus aureus (S. aureus) and Gram-negative Escherichia coli (E. coli) bacterial strains. The Ag–TiO2 NCs exhibited promising and superior antibacterial properties compared to TiO2 nanospheres as confirmed by the bacterial growth and inhibition zone. The improvement in the antibacterial activity was attributed to the synergistic effect of the hybrid nature of TiO2 nanoparticles in the presence of Ag.


2021 ◽  
Vol 285 ◽  
pp. 05012
Author(s):  
A. K. Milyuhinа ◽  
L. A. Zabodalova ◽  
U. Kyzdarbek ◽  
I. R. Romazyaeva ◽  
N. Yu. Klyuchko

Rosmarinus officinalis L. is known for its antioxidant and antibacterial properties against a variety of microorganisms. In this work, research has been carried out on pharmacy rosemary. Its antioxidant and antimicrobial properties have been determined. This study showed that the ethanol extract of R. officinalis L. has a pronounced antimicrobial activity against strains of both gram-positive and gram-negative bacteria. The extract also showed good antioxidant activity. Rosemary showed significantly more potent antibacterial activity against E. coli. The diameter of the zone of oppression was 17 mm. Thus, Rosemary Pharmaceutical has demonstrated potential as a dietary supplement due to its stronger antibacterial activity.


Sign in / Sign up

Export Citation Format

Share Document