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https://www.readbyqxmd.com/read/28921162/a-bionanohybrid-znal-nads-ecological-pesticide-as-a-treatment-for-soft-rot-disease-in-potato-solanum-tuberosum-l
#1
Erika Elizabeth Morales-Irigoyen, Yolanda de Las Mercedes Gómez-Y-Gómez, Jorge Luis Flores-Moreno, Marina Olivia Franco-Hernández
Pectobacterium carotovorum (Pc) is a phytopathogenic strain that causes soft rot disease in potato (Solanum tuberosum L.), resulting in postharvest losses. Chemical control is effective for managing this disease, but overdoses cause adverse effects. Because farmers insist on using chemical agents for crop protection, it is necessary to develop more effective pesticides in which the active compound released can be regulated. In this context, we proposed the synthesis of ZnAl-NADS, in which nalidixic acid sodium salt (NADS) is linked to a ZnAl-NO3 layered double hydroxide (LDH) host as a nanocarrier...
September 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28912764/resistance-to-antibiotics-biocides-preservatives-and-metals-in-bacteria-isolated-from-seafoods-co-selection-of-strains-resistant-or-tolerant-to-different-classes-of-compounds
#2
José L Romero, María J Grande Burgos, Rubén Pérez-Pulido, Antonio Gálvez, Rosario Lucas
Multi-drug resistant bacteria (particularly those producing extended-spectrum β-lactamases) have become a major health concern. The continued exposure to antibiotics, biocides, chemical preservatives, and metals in different settings such as the food chain or in the environment may result in development of multiple resistance or co-resistance. The aim of the present study was to determine multiple resistances (biocides, antibiotics, chemical preservatives, phenolic compounds, and metals) in bacterial isolates from seafoods...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28902008/fibrous-catalyst-enhanced-acanthamoeba-disinfection-by-hydrogen-peroxide
#3
Simon Kilvington, Lynn Winterton
SIGNIFICANCE: Hydrogen peroxide (H2O2) disinfection systems are contact-lens-patient problem solvers. The current one-step, criterion-standard version has been widely used since the mid-1980s, without any significant improvement. This work identifies a potential next-generation, one-step H2O2, not based on the solution formulation but rather on a case-based peroxide catalyst. PURPOSE: One-step H2O2 systems are widely used for contact lens disinfection. However, antimicrobial efficacy can be limited because of the rapid neutralization of the peroxide from the catalytic component of the systems...
September 9, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/28890211/antibacterial-photodynamic-therapy-with-curcumin-and-curcuma-xanthorrhiza-extract-against-streptococcus-mutans
#4
Hyung-Jung Lee, Si-Mook Kang, Seung-Hwa Jeong, Ki-Ho Chung, Baek-Il Kim
BACKGROUND: Bacteria are becoming increasingly resistant to conventional antibacterial chemotherapy, which has prompted the application of antibacterial photodynamic therapy (aPDT) in bacteria-related diseases due to its excellent biocide effects. However, few studies have attempted to develop a novel photosensitizer based on natural components. The aim of the present study was to compare the aPDT effects of curcumin and Curcuma xanthorrhiza extract (CXE) against Streptococcus mutans...
September 7, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28886569/dna-incision-evaluation-binding-investigation-and-biocidal-screening-of-cu-ii-ni-ii-and-co-ii-complexes-with-isoxazole-schiff-bases
#5
Nirmala Ganji, Vijay Kumar Chityala, Pradeep Kumar Marri, Rambabu Aveli, Vamsikrishna Narendrula, Sreenu Daravath, Shivaraj
Two new series of binary metal complexes [M(L(1))2] and [M(L(2))2] where, M=Cu(II), Ni(II) & Co(II) and L(1)=4-((3,4-dimethylisoxazol-5-ylimino)methyl)benzene-1,3-diol; L(2)=2-((3,4-dimethylisoxazol-5-ylimino)methyl)-5-methoxyphenol were synthesized and characterized by elemental analysis, (1)H NMR, (13)C NMR, FT-IR, ESI mass, UV-Visible, magnetic moment, ESR, SEM and powder XRD studies. Based on these results, a square planar geometry is assigned for all the metal complexes where the Schiff base acts as uninegatively charged bidentate chelating agent via the hydroxyl oxygen and azomethine nitrogen atoms...
August 31, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28885978/in-vitro-evaluation-of-mitochondrial-function-and-estrogen-signaling-in-cell-lines-exposed-to-the-antiseptic-cetylpyridinium-chloride
#6
Sandipan Datta, Guochun He, Alexey Tomilov, Sunil Sahdeo, Michael S Denison, Gino Cortopassi
BACKGROUND: Quaternary ammonium salts (QUATS), such as cetylpyridinium chloride (CPC) and benzalkonium chloride (BAK), are frequently used in antiseptic formulations, including toothpastes, mouthwashes, lozenges, throat and nasal sprays, and as biocides. Although in a recent ruling, the U.S. Food and Drug Administration (FDA) banned CPC from certain products and requested more data on BAK's efficacy and safety profile, QUATS, in general, and CPC and BAK, in particular, continue to be used in personal health care, food, and pharmaceutical and cleaning industries...
August 22, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28878364/analysis-and-imaging-of-biocidal-agrochemicals-using-tof-sims
#7
Valerio Converso, Sarah Fearn, Ecaterina Ware, David S McPhail, Anthony J Flemming, Jacob G Bundy
ToF-SIMS has been increasingly widely used in recent years to look at biological matrices, in particular for biomedical research, although there is still a lot of development needed to maximise the value of this technique in the life sciences. The main issue for biological matrices is the complexity of the mass spectra and therefore the difficulty to specifically and precisely detect analytes in the biological sample. Here we evaluated the use of ToF-SIMS in the agrochemical field, which remains a largely unexplored area for this technique...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28871247/archaeal-persisters-persister-cell-formation-as-a-stress-response-in-haloferax-volcanii
#8
Julianne Megaw, Brendan F Gilmore
Persister cells are phenotypic variants within a microbial population, which are dormant and transiently tolerant to stress. Persistence has been studied extensively in bacteria, and in eukaryotes to a limited extent, however, it has never been observed in archaea. Using the model haloarchaeon, Haloferax volcanii DS2, we demonstrated persister cell formation in this domain, with time-kill curves exhibiting a characteristic biphasic pattern following starvation or exposure to lethal concentrations of various biocidal compounds...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28869924/methylisothiazolinone-toxicity-and-inhibition-of-wound-healing-and-regeneration-in-planaria
#9
Alanna V Van Huizen, Ai-Sun Tseng, Wendy S Beane
Methylisothiazolinone (MIT) is a common biocide used in cosmetic and industrial settings. Studies have demonstrated that MIT is a human sensitizer, to the extent that in 2013 MIT was named allergen of the year. Recently, we showed that MIT exposure in Xenopus laevis (the African clawed frog) inhibits wound healing and tail regeneration. However, it is unknown whether MIT affects these processes in other animals. Here, we investigated the effects of MIT exposure in planaria-non-parasitic freshwater flatworms able to regenerate all tissues after injury...
August 26, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28862536/investigation-of-a-brazilian-tannery-effluent-by-means-of-zebra-fish-danio-rerio-embryo-acute-toxicity-fet-test
#10
Otávio Pelegrino Rocha, Danielle Palma De Oliveira
Tannery effluents consist of a complex chemical composition not only limited to primary pollutants, which also require biological detection as these compounds may produce adverse effects. The fish embryo toxicity (FET) test with Danio rerio is an alternative method in hazard and risk assessment for determination of chemical-mediated effects. The aim of this investigation was to use the FET test to detect compounds and consequent effects in Brazilian tannery effluents. Samples were collected from the inlet and outlet of the effluent treatment plant at a tannery located in Restinga, São Paulo, Brazil...
September 1, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28862297/synthesis-antimicrobial-activity-and-in-silico-studies-on-thymol-esters
#11
Jelena Lazarević, Ana Kolarević, Aleksandra Đorđević, Gordana Stojanović, Andrija Šmelcerović, Pierangela Ciuffreda, Enzo Santaniello
Derivatisation of parent structure in terpenoids often results in enhancement of biological activity of newly obtained compounds. Thymol, a naturally occurring phenol biosynthesized through the terpene pathway, is a well known biocide with strong antimicrobial attributes and diverse therapeutic activities. We have aimed our study on a single modification of phenolic functionality in thymol in order to obtain a small focused library of twenty thymyl esters, ten of which were new compounds. All compounds were involved in in vitro antimicrobial testing...
September 2017: Acta Chimica Slovenica
https://www.readbyqxmd.com/read/28861267/frequency-of-antiseptic-resistance-genes-in-clinical-staphycocci-and-enterococci-isolates-in-turkey
#12
Seyda Ignak, Yasar Nakipoglu, Bulent Gurler
BACKGROUND: Disinfectants and antiseptics are biocides widely used in hospitals to prevent spread of pathogens. It has been reported that antiseptic resistance genes, qac's, caused tolerance to a variety of biocidal agents, such as benzalkonium chloride (BAC) and chlorhexidine digluconate (CHDG) in Staphylococcus spp. isolates. We aimed to search the frequency of antiseptic resistance genes in clinical Staphylococcus spp. and Enterococcus spp. isolates to investigate the possible association with antiseptic tolerance and antibiotic resistance...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28861053/enhanced-biocide-treatments-with-d-amino-acid-mixtures-against-a-biofilm-consortium-from-a-water-cooling-tower
#13
Ru Jia, Yingchao Li, Hussain H Al-Mahamedh, Tingyue Gu
Different species of microbes form mixed-culture biofilms in cooling water systems. They cause microbiologically influenced corrosion (MIC) and biofouling, leading to increased operational and maintenance costs. In this work, two D-amino acid mixtures were found to enhance two non-oxidizing biocides [tetrakis hydroxymethyl phosphonium sulfate (THPS) and NALCO 7330 (isothiazoline derivatives)] and one oxidizing biocide [bleach (NaClO)] against a biofilm consortium from a water cooling tower in lab tests. Fifty ppm (w/w) of an equimass mixture of D-methionine, D-leucine, D-tyrosine, D-tryptophan, D-serine, D-threonine, D-phenylalanine, and D-valine (D8) enhanced 15 ppm THPS and 15 ppm NALCO 7330 with similar efficacies achieved by the 30 ppm THPS alone treatment and the 30 ppm NALCO 7330 alone treatment, respectively in the single-batch 3-h biofilm removal test...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28851528/liquid-chromatography-tandem-mass-spectrometry-multiresidue-method-for-the-analysis-of-quaternary-ammonium-compounds-in-cheese-and-milk-products-development-and-validation-using-the-total-error-approach
#14
Kahina Slimani, Aurélie Féret, Yvette Pirotais, Pierre Maris, Jean-Pierre Abjean, Dominique Hurtaud-Pessel
Quaternary ammonium compounds (QACs) are both cationic surfactants and biocidal substances widely used as disinfectants in the food industry. A sensitive and reliable method for the analysis of benzalkonium chlorides (BACs) and dialkyldimethylammonium chlorides (DDACs) has been developed that enables the simultaneous quantitative determination of ten quaternary ammonium residues in dairy products below the provisional maximum residue level (MRL), set at 0.1mgkg(-1). To the best of our knowledge, this method could be the one applicable to milk and to three major processed milk products selected, namely processed or hard pressed cheeses, and whole milk powder...
August 14, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28846614/antimicrobial-properties-of-silver-cations-substituted-to-faujasite-mineral
#15
Roman J Jędrzejczyk, Katarzyna Turnau, Przemysław J Jodłowski, Damian K Chlebda, Tomasz Łojewski, Joanna Łojewska
A goal of our study was to find an alternative to nano-silver-based antimicrobial materials which would contain active silver immobilized in a solid matrix that prevents its migration into the surrounding environment. In this study, we investigated whether silver cations dispersed in an atomic form and trapped in an ion-exchanged zeolite show comparable antimicrobial activity to silver nanoparticles (NPs). The biocidal active material was prepared from the sodium form of faujasite type zeolite in two steps: (1) exchange with silver cations, (2) removal of the external silver oxide NPs by elution with Na₂EDTA solution...
August 27, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28843204/toxicity-of-emerging-antifouling-biocides-to-non-target-freshwater-organisms-from-three-trophic-levels
#16
Isabel B Oliveira, Ksenia J Groh, Rene Schönenberger, Carlos Barroso, Kevin V Thomas, Marc J-F Suter
Antifouling (AF) systems provide the most cost-effective protection against biofouling. Several AF biocides have, however, caused deleterious effects in the environment. Subsequently, new compounds have emerged that claim to be more environment-friendly, but studies on their toxicity and environmental risk are necessary in order to ensure safety. This work aimed to assess the toxicity of three emerging AF biocides, tralopyril, triphenylborane pyridine (TPBP) and capsaicin, towards non-target freshwater organisms representing three trophic levels: algae (Chlamydomonas reinhardtii), crustacean (Daphnia magna) and fish (Danio rerio)...
August 1, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28841528/the-influence-of-seawater-properties-on-toxicity-of-copper-pyrithione-and-its-degradation-product-to-brine-shrimp-artemia-salina
#17
Vesna Lavtizar, Daisuke Kimura, Satoshi Asaoka, Hideo Okamura
Copper pyrithione (CuPT) is a biocide, used worldwide to prevent biofouling on submerged surfaces. In aquatic environments it rapidly degrades, however, one of the degradation products (HPT) is known to react with cupric ion back to its parent compound. Not much is known about the behavior and toxicity of CuPT and its degradation product HPT in different water systems. Hence, our aim was to investigate the ecotoxicity of CuPT, HPT as well as Cu(2+) to the brine shrimp Artemia salina in natural seawater and organic matter-free artificial seawater...
August 22, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28839493/diversity-of-multidrug-efflux-genes-and-phenotypic-evaluation-of-the-in-vitro-resistance-dynamics-of-clinical-staphylococcus-aureus-isolates-using-methicillin-a-model-%C3%AE-lactam
#18
John F Antiabong, Marleen M Kock, Nontombi M Bellea, Marthie M Ehlers
OBJECTIVES: Methicillin-resistant Staphylococcus aureus (MRSA) across the world often leave clinicians with little or no choice of treatment options. The multi-drug efflux (MDE) genes are bacterial survival mechanisms responsible for the pumping out of antibiotics and other biocides from the cytoplasm. Whilst effort is being made in the development of antibiotic adjuvants such as efflux pumps inhibitors, information is needed on the diversity of these MDEs in the circulating S. aureus and on the growth dynamics of the clinical isolates in response to antibiotics is not regularly examined...
2017: Open Microbiology Journal
https://www.readbyqxmd.com/read/28816320/formation-of-titanium-dioxide-core-shell-microcapsules-through-a-binary-phase-spray-technique
#19
Jonatan Bergek, Björn Elgh, Anders E C Palmqvist, Lars Nordstierna
Core-shell microcapsules consisting of a titanium dioxide shell and a hydrophobic solvent core have been prepared with diameters of a few micrometers and a narrow size distribution using a simple and fast airbrush technique. These microcapsules were prepared at room temperature in a single-step process in which an oil with a dissolved titanium alkoxide precursor was forced together with an aqueous solution, containing a surface-active polymer, through a narrow spray nozzle using a nitrogen gas propellant. Several different parameters of chemical, physical, and processing origin were investigated to find an optimal recipe...
September 13, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28811083/phenotypic-chlorhexidine-and-triclosan-susceptibility-in-clinical-staphylococcus-aureus-isolates-in-australia
#20
C Hughes, J Ferguson
Antiseptics such as chlorhexidine gluconate and triclosan are widely used in healthcare settings for both skin antisepsis and decolonisation of Staphylococcus aureus. We determined the minimum inhibitory concentration (MIC) of 198 methicillin susceptible and resistant Staphylococcus aureus clinical isolates to both chlorhexidine and triclosan using an agar dilution method. Of these, 10% (19/198) showed a raised MIC to chlorhexidine and 3% (6/198) showed an elevated MIC to triclosan. The multilocus sequence type (MLST) of each isolate was predicted using a binary method, and although ST93-MRSA-IV was the most common, ST22-MRSA-IV was shown to have statistically higher chlorhexidine MIC values compared with non ST22-MRSA-IV isolates (z = -8...
August 12, 2017: Pathology
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