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Hypochlorite

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https://www.readbyqxmd.com/read/29475185/a-highly-specific-and-ultrasensitive-near-infrared-fluorescent-probe-for-imaging-basal-hypochlorite-in-the-mitochondria-of-living-cells
#1
Baocun Zhu, Liu Wu, Meng Zhang, Yawei Wang, Caiyun Liu, Zuokai Wang, Qingxia Duan, Pan Jia
The development of highly specific and ultrasensitive fluorescent probes for tracking basal mitochondrial hypochlorite is very important to unravel its diverse cellular functions in the mitochondria of living cells. In this paper, we have developed a water-soluble, mitochondria-targeted near-infrared fluorescent probe NB-OCl for selectively measuring OCl- in the presence of higher concentration (500 μM) other biologically important substances. Surprisingly, the obtained results demonstrated that probe NB-OCl could sensitively determine OCl- in the range of 0-200 pM with the detection limit of 10...
February 9, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29459149/root-canal-irrigants-and-medicaments-in-endodontic-malpractice-cases-a-nationwide-longitudinal-observation
#2
Outi Swanljung, Miira M Vehkalahti
INTRODUCTION: The aim of this study was to assess the role of root canal irrigants and medicaments in endodontic injuries verified in Finland and to estimate the rate of such events over time. METHODS: The study material comprised all endodontic injuries verified by the Patient Insurance Centre in 2002 to 2006 (n = 521) and 2011 to 2013 (n = 449). The data, based on patient documents scrutinized by 2 specialists in endodontics, included patients' and dentists' sex and age and the service sector...
February 16, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29453071/degradation-of-dye-procion-red-mx-5b-by-electrolytic-and-electro-irradiated-technologies-using-diamond-electrodes
#3
Salvador Cotillas, Davide Clematis, Pablo Cañizares, Maria Paola Carpanese, Manuel A Rodrigo, Marco Panizza
This work focuses on the treatment of synthetic wastewater polluted with dye Procion Red MX-5B by different Electrochemical Advanced Oxidation Processes (EAOP) based on diamond anodes. The influence of the current density and the supporting electrolyte has been studied on dye removal and total mineralization of the organic matter. Results show that electrolysis with diamond electrodes is a suitable technology for an efficient degradation of dye. Nonetheless, the process efficiency increases when using chloride as supporting electrolyte because of the electrochemical generation of hypochlorite in wastewater which significantly contribute to dye removal...
February 3, 2018: Chemosphere
https://www.readbyqxmd.com/read/29451651/demetallization-of-enterococcus-faecalis-biofilm-a-preliminary-study
#4
Carlos Estrela, Rodrigo Costa E Silva, Roberta Cerasi Urban, Pablo José Gonçalves, Júlio A Silva, Cyntia R A Estrela, Jesus Djalma Pecora, Ove A Peters
Objectives To determine the concentration of calcium, iron, manganese and zinc ions after the application of chelator to Enterococcus faecalis biofilms. Material and Methods Fifty bovine maxillary central incisors were prepared and inoculated with E. faecalis for 60 days. The following were used as irrigation solutions: 17% EDTA (pH 3, 7 and 10), 2.5% sodium hypochlorite (NaOCl) combined with 17% EDTA (pH 3, 7 and 10), distilled water (pH 3, 7 and 10), and 2.5% NaOCl. Each solution was kept in the root canal for five minutes...
2018: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29447075/propionibacterium-acnes-has-low-susceptibility-to-chlorhexidine-digluconate
#5
Keisuke Nakase, Hanae Fukushima, Tomoko Yukawa, Hidemasa Nakaminami, Takeshi Fujii, Norihisa Noguchi
BACKGROUND: The skin bacterium Propionibacterium acnes has been reported to be responsible for surgical site infections (SSIs). Skin disinfection before surgery therefore is of the utmost importance in the prevention of SSIs caused by skin bacteria. METHODS: We assessed the susceptibility of clinical isolates of two skin bacteria, P. acnes and Staphylococcus epidermidis, to disinfectants. RESULTS: The range of chlorhexidine digluconate (CHG) minimum inhibitory concentrations (MICs) for P...
February 15, 2018: Surgical Infections
https://www.readbyqxmd.com/read/29443852/chlorhexidine-antiseptic-irrigation-eradicates-staphylococcus-epidermidis-from-biofilm-an-in-vitro-study
#6
Kenneth Schmidt, Chris Estes, Alex McLaren, Mark J Spangehl
BACKGROUND: Antiseptic and antibacterial solutions used for intraoperative irrigation are intended to kill bacteria and thereby decrease the incidence of surgical site infections. It is unknown if the concentrations and exposure times of irrigation solutions commonly used for prophylaxis in clean cases (povidone-iodine 0.35% for 3 minutes) are effective against bacteria in biofilm that are present in implant infections. Currently, povidone-iodine (0.35%), chlorhexidine (0.05%), sodium hypochlorite (0...
March 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29442508/chloroxyanion-residue-on-seeds-and-sprouts-after-chlorine-dioxide-sanitation-of-alfalfa-seed
#7
David J Smith, Grant R Herges
The effects of a 6-h chlorine dioxide sanitation of alfalfa seed (0, 50, 100, and 200 mg/kg seed) on total coliform bacteria, seed germination, and the presence of chlorate and perchlorate residues in seed rinse, seed soak, and alfalfa sprouts was determined. Chlorate residues in 20,000 mg/L calcium hypochlorite, commonly used to disinfect seed, were quantified. Chlorine dioxide treatment reduced (P < 0.05) total coliforms on seeds with no effect (P > 0.05) on germination. Dose-dependent sodium chlorate residues were present in seed rinse (4...
February 14, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29436057/cleaning-capacity-of-octenidine-as-root-canal-irrigant-a-scanning-electron-microscopy-study
#8
Hernán Coaguila-Llerena, Virgínia Stefanini da Silva, Mario Tanomaru-Filho, Juliane Maria Guerreiro Tanomaru, Gisele Faria
The aim of this study was to assess the cleaning capacity of the octenidine hydrochloride (OCT) used as root canal irrigant by scanning electron microscopy (SEM) analysis. Sixty human unirradicular extracted teeth were randomly distributed in 6 groups (n = 10) according to irrigant solutions which were used during root canal preparation: G1, 0.1% OCT; G2, 2% chlorhexidine (CHX); G3, 2.5% sodium hypochlorite (NaOCl); G4, OCT + 17% ethylenediaminetetraacetic acid (EDTA); G5, 2.5% NaOCl + 17% EDTA and G6, distilled water...
February 13, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29435399/rhodol-derivatives-as-selective-fluorescent-probes-for-the-detection-of-hgii-ions-and-the-bioimaging-of-hypochlorous-acid
#9
Ling Li, Shu Wang, Hongxia Lan, Guiyi Gong, Yifan Zhu, Yu Chung Tse, Keith Man-Chung Wong
Two sensors, 1 with a spirolactone group and 2 with a spirolactam group containing a phenyl isothiocyanate moiety, based on rhodol, were designed and synthesized in order to obtain materials with excellent optical properties for the detection of environmentally and biologically important Hg2+ and hypochlorous acid (HClO) ions. The crystal structure of 1 revealed two moieties, a rhodamine-like portion with a spirolactone and a fluorescein-like portion without a spirolactone. In the absence of analyte, 1 produced an optical output with a maximum absorption and emission at 475 and 570 nm, respectively, which was attributed to the fluorescein-like moiety without a spirolactone...
February 2018: ChemistryOpen
https://www.readbyqxmd.com/read/29433238/disinfection-efficacy-over-yeast-biofilms-of-juice-processing-industries
#10
María C Tarifa, Jorge E Lozano, Lorena I Brugnoni
Membrane separation systems represent a hot - spot for biofilm formation in juice industries. Sodium hypochlorite (NaOCl) has been traditionally the disinfectant of choice; however, its effectiveness over well-established biofilms is limited. In this work the study of biofilm formation on ultrafiltration membranes was proposed. The effectiveness of cleaning and disinfection procedures commonly used in juice industry was tested on the removal and killing of cells. The species used (Rhodotorula mucilaginosa, Candida krusei, Candida kefyr and Candida tropicalis) were isolated from ultrafiltration modules of a clarified apple juice industry...
March 2018: Food Research International
https://www.readbyqxmd.com/read/29433022/the-aldehyde-dehydrogenase-alda-contributes-to-the-hypochlorite-defense-and-is-redox-controlled-by-protein-s-bacillithiolation-in-staphylococcus-aureus
#11
Marcel Imber, Vu Van Loi, Sylvia Reznikov, Verena Nadin Fritsch, Agnieszka J Pietrzyk-Brzezinska, Janek Prehn, Chris Hamilton, Markus C Wahl, Agnieszka K Bronowska, Haike Antelmann
Staphylococcus aureus produces bacillithiol (BSH) as major low molecular weight (LMW) thiol which functions in thiol-protection and redox-regulation by protein S-bacillithiolation under hypochlorite stress. The aldehyde dehydrogenase AldA was identified as S-bacillithiolated at its active site Cys279 under NaOCl stress in S. aureus. Here, we have studied the expression, function, redox regulation and structural changes of AldA of S. aureus. Transcription of aldA was previously shown to be regulated by the alternative sigma factor SigmaB...
February 5, 2018: Redox Biology
https://www.readbyqxmd.com/read/29433004/a-facile-photoelectrochemical-sensor-for-high-sensitive-ros-and-aa-detection-based-on-graphitic-carbon-nitride-nanosheets
#12
Robabeh Motaghed Mazhabi, Liqin Ge, Hui Jiang, Xuemei Wang
Photoactive material is one of the main challenges for fabrication of sensitive and selective photoelectrochemical (PEC) sensor. Herein, a facile PEC sensor is constructed using graphitic carbon nitride nanosheets (g-C3N4 NSs) coated on the surface of ITO electrode, where electron donor properties of potassium ferrocyanide and ascorbic acid is utilized for the tracing of hydrogen peroxide (H2O2), hypochlorite (ClO-), and ascorbic acid (AA). Our designed PEC sensor exhibits a good linear range to H2O2 concentrations from 12...
February 5, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29430101/incidence-of-dentinal-defects-during-root-canal-preparation-with-hand-files-using-different-irrigants-an-in-vitro-study
#13
Ruchi Singla, Swaty Jhamb, Amandeep Kaur, Ruchi Vashisht
Introduction: The purpose of this in vitro study was to compare the incidence of dentinal defects during root canal preparation with hand files using different irrigants. Materials and Methods: A total of 120 extracted mandibular incisors were randomly divided into onecontrol group and five experimental groups (n = 20) depending on the irrigant used. Biomechanical preparation was not done in control group. Teeth in experimental groups were prepared with hand K-files to a master apical file #35 with 1-mm increments step-back up to #50...
November 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29430100/comparison-and-evaluation-of-two-reciprocating-root-canal-instruments-on-removal-of-smear-layer-by-using-two-irrigants-at-apical-one-third-of-the-root-canal-an-ex-vivo-scanning-electron-microscopic-study
#14
M M Jimna, T S Ashwini, H K Sowmya
Aim: To compare and evaluate the cleaning ability of two reciprocating systems, that is, WaveOne (WO) and self-adjusting files (SAF) in terms of removal of smear layer using sodium hypochlorite (NaOCl) and chlorhexidine gluconate (CHX) at apical one-third of the root canal. Materials and Methods: Forty-three human maxillary anterior teeth were selected. The canal was instrumented manually up to a number 25 K-file size. WO and SAF were used to prepare the root canals...
November 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29430092/comparative-evaluation-of-the-amount-of-debris-extruded-apically-using-conventional-syringe-passive-ultrasonic-irrigation-and-endoirrigator-plus-system-an-in-vitro-study
#15
Vidhi Prabhakar Shetty, Balaram Damodar Naik, Amit Kashinath Pachlag, Mahantesh Mrityunjay Yeli
Aim: The aim of this study is to compare the effects of conventional syringe, passive ultrasonic irrigation (PUI), and EndoIrrigator Plus on the amount of apically extruded debris. Materials and Methods: Thirty extracted human mandibular premolars were selected and randomly assigned to three groups (n = 10). The root canals were irrigated with conventional syringe, PUI, and EndoIrrigator Plus. Sodium hypochlorite was used as an irrigant, and debris was collected in a previously described experimental model (Myers and Montgomery 1991)...
November 2017: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/29426645/novel-endodontic-disinfection-approach-using-catalytic-nanoparticles
#16
Sarah Bukhari, Dongyeop Kim, Yuan Liu, Bekir Karabucak, Hyun Koo
INTRODUCTION: The aim of this study was to test a new disinfection technology using biomimetic iron oxide nanoparticles (IO-NPs) with peroxidaselike activity to enhance antibacterial activity on root canal surfaces and in dentinal tubules. METHODS: The canal surfaces and dentinal tubules of single-rooted intact extracted teeth were infected by growing Enterococcus faecalis biofilms for 3 weeks. The samples were divided into 6 treatment groups: (1) phosphate-buffered saline (PBS) (negative control), (2) 3% hydrogen peroxide (H2O2) (test control), (3) IO-NPs (0...
February 6, 2018: Journal of Endodontics
https://www.readbyqxmd.com/read/29426468/in-vitro-activity-of-natural-and-chemical-products-on-sporulation-of-eimeria-species-oocysts-of-chickens
#17
Sahar M Gadelhaq, Waleed M Arafa, Shawky M Abolhadid
This study was designed to investigate the ability of two herbal extracts and different chemical substances to inhibit or disrupt sporulation of Eimeria species oocysts of the chickens. The two herbal extracts were Allium sativum (garlic) and Moringa olifiera while the chemical substances included commercial disinfectants and diclazuril. Field isolates of Eimeria oocysts were propagated in chickens to obtain a continuous source of oocysts. The collected unsporulated oocysts (105oocysts/5 ml) were dispensed into 5 cm Petri dish...
February 15, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29424725/sodium-hypochlorite-dosage-for-household-and-emergency-water-treatment-updated-recommendations
#18
Natalie Wilhelm, Anya Kaufmann, Elizabeth Blanton, Daniele Lantagne
Household water treatment with chlorine can improve the microbiological quality of household water and reduce diarrheal disease. We conducted laboratory and field studies to inform chlorine dosage recommendations. In the laboratory, reactors of varying turbidity (10-300 NTU) and total organic carbon (0-25 mg/L addition) were created, spiked with Escherichia coli, and dosed with 3.75 mg/L sodium hypochlorite. All reactors had >4 log reduction of E. coli 24 hours after chlorine addition. In the field, we tested 158 sources in 22 countries for chlorine demand...
February 2018: Journal of Water and Health
https://www.readbyqxmd.com/read/29415973/antibacterial-activity-and-dentin-bonding-ability-of-combined-use-of-clearfil-se-protect-and-sodium-hypochlorite
#19
Ilijana Muratovska, Haruaki Kitagawa, Nanako Hirose, Ranna Kitagawa, Satoshi Imazato
The aim of this study was to evaluate the antibacterial activity and dentin bonding ability of a commercial self-etch adhesive Clearfil SE Protect (Kuraray Noritake Dental, Tokyo, Japan) in combination with sodium hypochlorite (NaOCl). Agar disc diffusion tests and measurement of minimum inhibitory/bactericidal concentrations (MIC/MBC) against Streptococcus mutans were performed to evaluate antibacterial effects. The mixture solution of 5.25% NaOCl and the primer of Clearfil SE Protect demonstrated less antibacterial activity than primer only...
February 8, 2018: Dental Materials Journal
https://www.readbyqxmd.com/read/29414884/degradation-investigation-of-selected-taste-and-odor-compounds-by-a-uv-chlorine-advanced-oxidation-process
#20
Jingyun Fang, Jiajian Liu, Chii Shang, Chihhao Fan
Taste- and odor-causing (T&O) compounds are a major concern in drinking water treatment plants due to their negative impacts on the safety and palatability of water supply. This study explored the degradation kinetics and radical chemistry of four often-detected T&O compounds, geosmin (GSM), 2-methylisoborneol (MIB), benzothiazole (BT), and 2-isobutyl-3-methoxypyrazine (IBMP), in the ultraviolet/chlorine (UV/chlorine) advanced oxidation process. All experiments were carried out in a 700 mL photoreactor and the process effectively degraded the investigated T&O compounds in a slightly acidic environment...
February 7, 2018: International Journal of Environmental Research and Public Health
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