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https://www.readbyqxmd.com/read/28930276/essential-oil-of-cymbopogon-citratus-on-the-control-of-the-curvularia-leaf-spot-disease-on-maize
#1
Dalmarcia de Sousa Carlos Mourão, Talita Ferreira de Souza Pereira, Danival José de Souza, Aloísio Freitas Chagas Júnior, Mateus Sunti Dalcin, Ronice Alves Veloso, Evelynne Urzêdo Leão, Gil Rodrigues Dos Santos
The Curvularia Leaf Spot is becoming more common due to the culture expansion and the low resistance of the cultivated genotypes in tropical regions. Thus, the objective was to evaluate the fungitoxicity of the essential oil of Cymbopogon citratus upon the phytopathogen Curvularia lunata, causative agent of the Curvularia Leaf Spot. There was realized pathogenicity tests of C. lunata in maize plants, phytotoxicity of the essential oil of C. citratus and gas chromatography attached, germination tests of the conidia, and of in vitro inhibition of C...
August 20, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28930264/essential-oil-from-piper-aduncum-chemical-analysis-antimicrobial-assessment-and-literature-review
#2
Lianet Monzote, Ramón Scull, Paul Cos, William N Setzer
Background: The challenge in antimicrobial chemotherapy is to find safe and selective agents with potency that will not be compromised by previously developed resistance. Terrestrial plants could provide new leads to antibacterial, antifungal, or antiprotozoal activity. Methods: The essential oil (EO) of Piper aduncum L. (Piperaceae) from Cuba was analyzed by gas chromatography-mass spectrometry (GC-MS). A cluster analysis of P. aduncum EO compositions reported in the literature was carried out. The EO was screened against a panel of microorganisms (bacteria, fungi, parasitic protozoa) as well as for cytotoxicity against human cells...
July 2, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28927409/biological-and-physicochemical-properties-of-biosurfactants-produced-by-lactobacillus-jensenii-p6a-and-lactobacillus-gasseri-p65
#3
I M C Morais, A L Cordeiro, G S Teixeira, V S Domingues, R M D Nardi, A S Monteiro, R J Alves, E P Siqueira, V L Santos
BACKGROUND: Lactobacillus species produce biosurfactants that can contribute to the bacteria's ability to prevent microbial infections associated with urogenital and gastrointestinal tracts and the skin. Here, we described the biological and physicochemical properties of biosurfactants produced by Lactobacillus jensenii P6A and Lactobacillus gasseri P65. RESULTS: The biosurfactants produced by L. jensenii P6A and L. gasseri P65 reduced the water surface tension from 72 to 43...
September 19, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28926473/hydrogen-gas-attenuates-sevoflurane-neurotoxicity-through-inhibiting-nuclear-factor-%C3%AE%C2%BA-light-chain-enhancer-of-activated-b-cells-signaling-and-proinflammatory-cytokine-release-in-neonatal-rats
#4
Yiwei Shi, Gang Wang, Jinyuan Li, Wenli Yu
Anesthesia neurotoxicity in developing brain has gained increasing attention. However, knowledge regarding its mitigating strategies remains scant. Sevoflurane, a commonly used anesthetic, is responsible for learning and memory deficits in neonates. Molecular hydrogen is reported to be a potential neuroprotective agent because of its antioxidative and anti-inflammatory activities. This study aimed to investigate the effect of hydrogen gas on sevoflurane neurotoxicity. The newborn rats were treated with sevoflurane and/or hydrogen gas for 2 h...
September 18, 2017: Neuroreport
https://www.readbyqxmd.com/read/28918154/hot-topic-geographical-distribution-and-strain-diversity-of-lactobacillus-wasatchensis-isolated-from-cheese-with-unwanted-gas-formation
#5
Michele Culumber, Donald J McMahon, Fatih Ortakci, Lauren Montierth, Beatriz Villalba, Jeffery R Broadbent, Craig J Oberg
Lactobacillus wasatchensis, an obligate heterofermentative nonstarter lactic acid bacteria (NSLAB) implicated in causing gas defects in aged cheeses, was originally isolated from an aged Cheddar produced in Logan, Utah. To determine the geographical distribution of this organism, we isolated slow-growing NSLAB from cheeses collected in different regions of the United States, Australia, New Zealand, and Ireland. Seven of the cheeses showed significant gas defects and 12 did not. Nonstarter lactic acid bacteria were isolated from these cheeses on de Man, Rogosa, and Sharpe medium supplemented with ribose, a preferred substrate for Lb...
September 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28917789/chemometric-optimization-of-the-extraction-and-derivatization-of-parabens-for-their-determination-in-water-samples-by-rotating-disk-sorptive-extraction-and-gas-chromatography-mass-spectrometry
#6
Mercedes Becerra-Herrera, Valentina Miranda, Daniel Arismendi, Pablo Richter
A combination of rotating disk sorptive extraction (RDSE) using Oasis® HLB as the sorbent phase and gas chromatography mass spectrometry (GC-MS) has been performed for the determination of four of the most widely used parabens: methylparaben, ethylparaben, propylparaben and n-butylparaben. The extraction and derivatization of the analytes in water samples were optimized by using factorial (screening) and Doehlert designs, thus reducing the number of analyses with the concomitant reduction of time, reagents, waste, samples and cost...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28915792/levosimendan-combined-with-epinephrine-improves-rescue-outcomes-in-a-rat-model-of-lipid-based-resuscitation-from-bupivacaine-induced-cardiac-arrest
#7
Fubei Nan, Xixi Cai, Yingchao Ye, Xuzhong Xu, Zhengqian Li, Min Li, Limei Chen
BACKGROUND: The effectiveness of a combination of a lipid emulsion with epinephrine in reversing local anesthetic-induced cardiac arrest has been confirmed. The combination of a lipid emulsion with levosimendan, was shown to be superior to administration of a lipid emulsion alone with regard to successful resuscitation. In this study, we compared the reversal effects of levosimendan, epinephrine, and a combination of the two agents in lipid-based resuscitation in a rat model of bupivacaine-induced cardiac arrest...
September 15, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28915115/anti-arthritic-and-gastroprotective-activities-of-ardisia-crispa-root-partially-mediated-via-its-antioxidant-effect
#8
Roslida Abdul Hamid, Lau Moi Fong, Yeong Looi Ting
Background Ardisia crispa Thunb A.DC (Myrsinaceae), commonly known as "hen's eyes", has been traditionally used in treating various inflammatory diseases. The present study evaluated anti-arthritic, gastroprotective and antioxidant activities of Ardisia crispa root hexane extract (ACRH) in various animal models. Methods Anti-arthritic activity was evaluated in complete Freund adjuvant (CFA)-induced adjuvant arthritis and gastroprotective effect was studied in the ethanol-induced ulcer model in rats. ACRH was further isolated to yield quinone-rich fraction (QRF) and both were analyzed for their total phenolic content, total flavonoid content and antioxidant activities in various antioxidant assays...
September 14, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/28910962/pharmaceuticals-and-other-anthropogenic-chemicals-in-atmospheric-particulates-and-precipitation
#9
Mark L Ferrey, M Coreen Hamilton, Will J Backe, Kurt E Anderson
Air and precipitation samples were analyzed by liquid chromatography tandem mass spectrometry (LC-MS/MS) and gas chromatography mass spectrometry (GC-MS) for pharmaceuticals, personal care products, and other commercial chemicals within the St. Paul/Minneapolis metropolitan area of Minnesota, U.S. Of the 126 chemicals analyzed, 17 were detected at least once. Bisphenol A, N,N-diethyl-meta-toluamide (DEET), and cocaine were the most frequently detected; their maximum concentrations in snow were 3.80, 9.49, and 0...
September 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28903829/quantification-of-induced-hypothermia-from-aseptic-scrub-applications-during-rodent-surgery-preparation
#10
Anna M Skorupski, Jingyi Zhang, Danielle Ferguson, Frank Lawrence, F Claire Hankenson
Laboratory mice (Mus musculus) are prone to develop hypothermia during anesthesia for surgery, thus potentially impeding anesthetic recovery, wound healing, and future health. The core body temperatures of isoflurane-anesthetized mice are influenced by the choice of supplemental heat sources; however, the contribution of various surgical scrubs on the body temperatures of mice under gas anesthesia has not been assessed. We sought to quantify the effect of using alcohol (70% isopropyl alcohol [IPA]) compared with saline to rinse away surgical scrub on the progression of hypothermia in anesthetized mice (n = 47)...
September 1, 2017: Journal of the American Association for Laboratory Animal Science: JAALAS
https://www.readbyqxmd.com/read/28903761/protective-effects-of-grape-seed-and-skin-extract-against-high-fat-diet-induced-lipotoxicity-in-rat-lung
#11
Mohamed El Ayed, Safwen Kadri, Selima Smine, Salem Elkahoui, Ferid Limam, Ezzedine Aouani
BACKGROUND: Obesity is a public health problem characterized by increased fat accumulation in different tissues. Obesity is directly linked to breathing problems and medical complications with lung, including obstructive sleep apnea syndrome, obesity hypoventilation syndrome, chronic obstructive pulmonary disease, asthma….In the present work, we aimed to investigate the effect of high fat diet (HFD) on lung lipotoxicity, oxidative stress, fatty acid composition and proportions in lung and implication in asthma development...
September 13, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28903558/mustard-gas-surrogate-interactions-with-modified-porous-carbon-fabrics-effect-of-oxidative-treatment
#12
Marc Florent, Dimitrios A Giannakoudakis, Teresa J Bandosz
Removal of chemical warfare agent (CWA) surrogates by highly porous carbon textiles were investigated. The carbon cloth was modified by oxidation in a mixture of concentrated sulfuric and nitric acid. This process did not affect a textile structural integrity. The surface properties of the modified textiles were investigated and their capabilities to remove 2-chloroethyl ethyl sulfide (CEES) and diethylsulfide (EES), two mustard gas surrogates, were evaluated. The oxidized carbon textiles have a highly active surface that has the ability to form radical species...
September 13, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28901132/regioselectivity-of-the-oh-radical-addition-to-uracil-in-nucleic-acids-a-theoretical-approach-based-on-qm-mm-simulations
#13
Juan Aranda, Antonio Francés-Monerris, Iñaki Tuñón, Daniel Roca-Sanjuán
Oxidation of nucleic acids are ubiquitous in living beings under metabolic impairments and/or exposed to external agents such as radiation, pollutants, or drugs, playing a central role in the development of many diseases mediated by DNA/RNA degeneration. Great efforts have been devoted to unveil the molecular mechanisms behind the OH radical additions to the double bonds of nucleobases, however, the specific role of the biological environment remains rela-tively unexplored. The present contribution tackles the study of the OH radical addition to uracil from the gas phase to a full RNA macromolecule by means of quantum-chemistry methods combined with molecular dynamics simulations...
September 13, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28899502/melaleuca-quinquenervia-essential-oil-inhibits-%C3%AE-melanocyte-stimulating-hormone-induced-melanin-production-and-oxidative-stress-in-b16-melanoma-cells
#14
Wen-Wan Chao, Chia-Chi Su, Hsin-Yi Peng, Su-Tze Chou
BACKGROUND: Essential oils are odorous, volatile products of plant secondary metabolism, which are found in many leaves and stems. They show important biological activities, which account for the development of aromatherapy used in complementary and alternative medicine. The essential oil extracted from Melaleuca quinquenervia (Cav.) S.T. Blake (paperbark) (MQ-EO) has various functional properties. PURPOSE: The aim of this study is to investigate the chemical composition of MQ-EO by using gas chromatography-mass spectrometry (GC-MS) and evaluate its tyrosinase inhibitory activity...
October 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28893018/changes-in-gas-composition-during-low-flow-anaesthesia-without-nitrous-oxide
#15
Ranjana Venkatachalapathy, Anusha Cherian, Sakthirajan Panneerselvam
INTRODUCTION: Low flow anaesthesia utilising Oxygen (O2) and Nitrous Oxide (N2O) mixture carries a risk of hypoxia, but avoiding N2O results in increased analgesic and volatile anaesthetic agent requirement. AIM: This study attempted to find the lowest Fraction of inspired Oxygen (FiO2) levels achieved with a mixture of 300 mL/min each of O2 and medical air over two hours and to compare the overall analgesic requirement and cost while using similar flows of N2O and O2, respectively...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28892724/effect-of-biochar-amendment-on-compost-organic-matter-composition-following-aerobic-composting-of-manure
#16
Nikolas Hagemann, Edisson Subdiaga, Silvia Orsetti, José María de la Rosa, Heike Knicker, Hans-Peter Schmidt, Andreas Kappler, Sebastian Behrens
Biochar, a material defined as charred organic matter applied in agriculture, is suggested as a beneficial additive and bulking agent in composting. Biochar addition to the composting feedstock was shown to reduce greenhouse gas emissions and nutrient leaching during the composting process, and to result in a fertilizer and plant growth medium that is superior to non-amended composts. However, the impact of biochar on the quality and carbon speciation of the organic matter in bulk compost has so far not been the focus of systematic analyses, although these parameters are key to determine the long-term stability and carbon sequestration potential of biochar-amended composts in soil...
September 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28890980/fast-and-accurate-prediction-of-proton-affinities-revisiting-the-extended-koopmans-theorem-for-protons
#17
Laura Pedraza-González, Jorge Charry, William Quintero, Jorge Alí-Torres, Andrés Reyes
In this work we propose schemes based on the extended Koopmans' theorem for quantum nuclei (eKT), in the framework of the any particle molecular orbital approach (APMO/KT), for the quantitative prediction of gas phase proton affinities (PAs). The performance of these schemes has been tested on a set of 300 organic molecules containing diverse functional groups. The APMO/KT scheme scaled by functional group (APMO/KT-SC-FG) displays an overall mean absolute error of 1.1 kcal mol(-1) with respect to experimental data...
September 11, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28889941/ultrasonic-characteristics-and-cellular-properties-of%C3%A2-anabaena-gas-vesicles
#18
Yaoheng Yang, Zhihai Qiu, Xuandi Hou, Lei Sun
Ultrasound imaging is a common modality in clinical examination and biomedical research, but has not played a significant role in molecular imaging for lack of an appropriate contrast agent. Recently, biogenic gas vesicles (GVs), naturally formed by cyanobacteria and haloarchaea, have exhibited great potential as an ultrasound molecular imaging probe with a much smaller size (∼100 nm) and improved imaging contrast. However, the basic acoustic and biological properties of GVs remain unclear, which hinders future application...
September 7, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28889826/recombinant-factor-viia-as-a-rescue-therapy-in-severe-haemoptysis-in-a-patient-with-a-fontan-circulation
#19
Thomas W Mason, Andrew Retter, Gareth J Morgan
We describe the successful use of recombinant factor VIIa (rFVIIa) in the control of massive haemoptysis in a 17-year-old patient with a Fontan circulation. The patient was intubated and ventilated in the ICU with deteriorating gas exchange. Conventional methods to control the haemoptysis were ineffective, and rFVIIa was successfully administered as a rescue therapy. rFVIIa is a powerful pro-thrombotic agent, which is only licensed in haemophiliacs with acquired inhibitors to anticoagulation. It has been used off-license in the treatment of massive haemorrhage, although a Cochrane review did not show any significant benefit; however, it may have a role as a rescue therapy where alternatives options have been exhausted after careful risk-benefit analysis...
September 11, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28889361/brevibacillus-laterosporus-isolated-from-the-digestive-tract-of-honeybees-has-high-antimicrobial-activity-and-promotes-growth-and-productivity-of-honeybee-s-colonies
#20
Jamal M Khaled, Fahd A Al-Mekhlafi, Ramzi A Mothana, Naiyf S Alharbi, Khalid E Alzaharni, Anwar H Sharafaddin, Shine Kadaikunnan, Ahmed S Alobaidi, Noofal I Bayaqoob, Marimuthu Govindarajan, Giovanni Benelli
The development of novel antimicrobial drugs, as well as the discovery of novel compounds able to promote honeybee's growth, represents major challenges for modern entomology. The main aim of this study was to investigate whether Brevibacillus laterosporus isolated from the digestive tract of Saudi honeybees, Apis mellifera, was able to stimulate colony strength parameters of honeybees and to evaluate its ability to produce antimicrobial agents. Honeybees were collected in Dirab, Riyadh Region, Saudi Arabia, and microorganisms were isolated and identified by 16S ribosomal RNA analysis...
September 9, 2017: Environmental Science and Pollution Research International
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