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https://www.readbyqxmd.com/read/29329710/hydride-generation-coupled-with-thioglycolic-acid-coated-gold-nanoparticles-as-simple-and-sensitive-headspace-colorimetric-assay-for-visual-detection-of-sb-iii
#1
Tesfaye Tolessa, Zhi-Qiang Tan, Jing-Fu Liu
Antimony (Sb) is a toxic element which causes different health problems including cardiac problems and lung cancer in humans, and its levels in surface water can be noticeably increased to 100 μg/L typically in the proximity of anthropogenic sources. Thus, besides instrumental techniques, it is of great significance to develop a simple, sensitive and selective analytical method for direct analysis of Sb(III) at trace level without the need of any expensive and/or complicated instrumentations and sample preparation processes...
April 3, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29329229/chemical-composition-and-evaluation-of-the-biological-properties-of-the-essential-oil-of-the-dietary-phytochemical-lippia-citriodora
#2
Eleni Fitsiou, Gregoria Mitropoulou, Katerina Spyridopoulou, Manolis Vamvakias, Haido Bardouki, Alex Galanis, Katerina Chlichlia, Yiannis Kourkoutas, Mihalis Ι Panayiotidis, Aglaia Pappa
The aim of the study was to characterize the chemical composition and biological properties of the essential oil from the plant Lippia citriodora grown in Greece. The essential oil volatiles were analyzed by gas chromatography-mass spectrometry GC-MS indicating citral as the major component. Τhe antimicrobial properties were assayed using the disk diffusion method and the minimum inhibitory and non-inhibitory concentration values were determined. Listeria monocytogenes, Staphylococcus epidermidis, Staphylococcus aureus, Saccharomyces cerevisiae, and Aspergillus niger were sensitive to Lippia citriodora oil, but not Escherichia coli, Salmonella Enteritidis, Salmonella typhimurium, and Pseudomonas fragi...
January 12, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29316032/optimum-time-for-intravenous-cannulation-after-induction-with-sevoflurane-oxygen-and-nitrous-oxide-in-children-without-any-premedication
#3
Abm Kamrul Hasan, Raman Sivasankar, Salil G Nair, Wamia U Hasan, Zulaidi Latif
BACKGROUND: Intravenous cannulation is usually done in children after inhalational induction with volatile anesthetic agents. The optimum time for safe intravenous cannulation after induction with sevoflurane, oxygen, and nitrous oxide has been studied in premedicated children, but there is no information for the optimum time for cannulation with inhalational induction in children without premedication. AIMS: The aim of this study was to determine the optimum time for intravenous cannulation after the induction of anesthesia with sevoflurane, oxygen, and nitrous oxide in children without any premedication...
January 8, 2018: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/29315308/mac-sparing-effect-of-nitrous-oxide-in-sevoflurane-anesthetized-sheep-and-its-reversal-with-systemic-atipamezole-administration
#4
Lauren Duffee, Nicolò Columbano, Antonio Scanu, Valentino Melosu, Giovanni Mario Careddu, Giovanni Sotgiu, Bernd Driessen
INTRODUCTION: Nitrous oxide (N2O) is an anesthetic gas with antinociceptive properties and reduces the minimum alveolar concentration (MAC) for volatile anesthetic agents, potentially through mechanisms involving central alpha2-adrenoceptors. We hypothesized that 70% N2O in the inspired gas will significantly reduce the MAC of sevoflurane (MACSEVO) in sheep, and that this effect can be reversed by systemic atipamezole. MATERIALS AND METHODS: Animals were initially anesthetized with SEVO in oxygen (O2) and exposed to an electrical current as supramaximal noxious stimulus in order to determine MACSEVO (in duplicates)...
2018: PloS One
https://www.readbyqxmd.com/read/29314635/semiochemicals-to-enhance-herbivory-by-diorhabda-carinulata-aggregations-in-saltcedar-tamarix-spp-infestations
#5
Alexander M Gaffke, Sharlene E Sing, Tom L Dudley, Daniel W Bean, Justin A Russak, Agenor Mafra-Neto, Paul A Grieco, Robert K D Peterson, David K Weaver
BACKGROUND: Semiochemicals for monitoring, attracting or repelling pest and beneficial organisms are increasingly deployed in agricultural and forest systems for pest management activities. However, the use of aggregation pheromones and host plant attractants for the express purpose of increasing the efficacy of classical biological control agents of weeds has not been widely reported. Therefore, we conducted field-based assays to determine if a specialized wax based matrix impregnated with an aggregation pheromone of the northern tamarisk beetle Diorhabda carinulata (Desbrochers) or host plant volatiles could increase the efficacy of D...
January 3, 2018: Pest Management Science
https://www.readbyqxmd.com/read/29303609/buffering-agent-induced-lactose-content-increases-via-growth-hormone-mediated-activation-of-gluconeogenesis-in-lactating-goats
#6
L Li, M L He, Y Liu, Y S Zhang
Dairy goats are often fed a high-concentrate (HC) diet to meet their lactation demands; however, long-term concentrate feeding is unhealthy and leads to milk yield and lactose content decreases. Therefore, we tested whether a buffering agent is able to increase the output of glucose in the liver and influence lactose synthesis. Eight lactating goats were randomly assigned to two groups: one group received a HC diet (Concentrate : Forage = 6:4, HG) and the other group received the same diet with a buffering agent added (0...
January 5, 2018: Physiological Research
https://www.readbyqxmd.com/read/29300714/electrophysiology-of-olfactory-and-optic-nerve-in-outpatient-and-intraoperative-settings
#7
Praveen Hariharan, Jeffery R Balzer, Katherine Anetakis, Donald J Crammond, Parthasarathy D Thirumala
Evoked potentials are time-locked electrophysiologic potentials recorded in response to standardized stimuli using scalp electrodes. These responses provide good temporal resolution and have been used in various clinical and intraoperative settings. Olfactory evoked potentials (OEPs) may be used as an adjunct tool in identifying patients of Parkinson disease and Alzheimer dementia. In clinical practice, visual evoked potentials (VEPs) are particularly useful in identifying subclinical cases of optic neuritis and in treatment surveillance...
January 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29295966/analysis-of-volatile-organic-compounds-in-the-breath-of-patients-with-stable-or-acute-exacerbation-of-chronic-obstructive-pulmonary-disease
#8
Alex Pizzini, Wojciech Filipiak, Johannes Wille, Clemens Ager, Helmut Wiesenhofer, Robert Kubinec, Jaroslav Blasko, Christoph Tschurtschenthaler, Christopher A Mayhew, Günter Weiss, Rosa Bellmann-Weiler
Chronic obstructive pulmonary disease (COPD) is a major cause of death worldwide. Acute exacerbations (AECOPD), caused by infectious and non-infectious agents, contribute to an increase in mortality. The diagnostic procedure of AECOPD is mainly based on clinical features. The aim of this pilot study was to identify whether volatile organic compounds (VOCs) in breath could be used to discriminate for acute exacerbated COPD. Three patient groups were included in this controlled study: AECOPD patients (n= 14, age mean ± SD: 71...
January 3, 2018: Journal of Breath Research
https://www.readbyqxmd.com/read/29277443/priming-plant-resistance-by-activation-of-redox-sensitive-genes
#9
Carmen González-Bosch
Priming by natural compounds is an interesting alternative for sustainable agriculture, which also contributes to explore the molecular mechanisms associated with stress tolerance. Although hosts and stress types eventually determine the mode of action of plant-priming agents, it highlights that many of them act on redox signalling. These include vitamins thiamine, riboflavin and quercetin; organic acids like pipecolic, azelaic and hexanoic; volatile organic compounds such as methyl jasmonate; cell wall components like chitosans and oligogalacturonides; H2O2, etc...
December 22, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29274122/zoophytophagous-mirids-provide-pest-control-by-inducing-direct-defences-antixenosis-and-attraction-to-parasitoids-in-sweet-pepper-plants
#10
Sarra Bouagga, Alberto Urbaneja, José L Rambla, Víctor Flors, Antonio Granell, Josep A Jaques, Meritxell Pérez-Hedo
BACKGROUND: In addition to their services as predators, mirid predators are able to induce plant defences by phytophagy. However, whether this induction occurs in sweet pepper and whether it could be an additional benefit to their role as biological control agent in this crop remains unknown. Here, these questions are investigated in two model insects, the mirids Nesidiocoris tenuis and Macrolophus pygmaeus. RESULTS: Plant feeding behaviour was observed in both N...
December 23, 2017: Pest Management Science
https://www.readbyqxmd.com/read/29249499/spontaneous-ventilation-thoracoscopic-thymectomy-without-muscle-relaxant-for-myasthenia-gravis-comparison-with-standard-thoracoscopic-thymectomy
#11
Long Jiang, Lieven Depypere, Gaetano Rocco, Jin-Shing Chen, Jun Liu, Wenlong Shao, Hanyu Yang, Jianxing He
OBJECTIVES: Myasthenia gravis (MG) benefits from thymectomy. However, its unpredictable response to muscle relaxants and volatile anesthetic agents may result in muscle weakness and subsequently in postoperative myasthenic crisis. The aim of this study was to determine the surgical outcomes after spontaneous ventilation compared with conventional intubated video-assisted thoracoscopic thymectomy (spontaneous-ventilation video-assisted thoracic thymectomy [SV-VATT] vs intubated video-assisted thoracic thymectomy) in patients with MG...
November 21, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29240978/biomimicry-of-volatile-based-microbial-control-for-managing-emerging-fungal-pathogens
#12
REVIEW
Kyle T Gabriel, Joseph D Sexton, Christopher T Cornelison
Volatile organic compounds (VOCs) are known to be produced by a wide range of microorganisms and for a number of purposes. Volatile-based microbial inhibition in environments such as soil is well-founded, with numerous antimicrobial VOCs having been identified. Inhibitory VOCs are of interest as microbial control agents, as low concentrations of gaseous VOCs can elicit significant antimicrobial effects. Volatile organic compounds are organic chemicals typically characterized as having low molecular weight, low solubility in water, and high vapor pressure...
December 14, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29240662/essential-oils-from-neotropical-piper-species-and-their-biological-activities
#13
REVIEW
Joyce Kelly da Silva, Rafaela da Trindade, Nayara Sabrina Alves, Pablo Luís Figueiredo, José Guilherme S Maia, William N Setzer
The Piper genus is the most representative of the Piperaceae reaching around 2000 species distributed in the pantropical region. In the Neotropics, its species are represented by herbs, shrubs, and lianas, which are used in traditional medicine to prepare teas and infusions. Its essential oils (EOs) present high yield and are chemically constituted by complex mixtures or the predominance of main volatile constituents. The chemical composition of Piper EOs displays interspecific or intraspecific variations, according to the site of collection or seasonality...
December 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29239012/maintenance-of-equine-anaesthesia-over-the-last-50-years-controlled-inhalation-of-volatile-anaesthetics-and-pulmonary-ventilation
#14
REVIEW
M Mosing, J M Senior
In the first edition of this journal Barbara Weaver wrote a review titled 'Equine Anaesthesia' [1], stating, that, at that time it was quickly becoming accepted practice that many horses were being anaesthetised "by essentially similar procedures, i.e. premedication, induction and then maintenance by controlled inhalation". Her review focussed upon the last procedure. Maintenance of anaesthesia through controlled inhalation implies that an anaesthetic agent can be suitably delivered via the respiratory system and that ventilation is sufficiently maintained to deliver that agent and maintain adequate gas exchange...
December 14, 2017: Equine Veterinary Journal
https://www.readbyqxmd.com/read/29217159/the-chemical-composition-and-trypanocidal-activity-of-volatile-oils-from-brazilian-caatinga-plants
#15
Larissa Isabela Oliveira de Souza, Patrícia Cristina Bezzera-Silva, Daniela Maria do Amaral Ferraz Navarro, Alexandre Gomes da Silva, Maria Tereza Dos Santos Correia, Márcia Vanusa da Silva, Regina Celia Bressan Queiroz de Figueiredo
Essential/volatile oils (EOs) from plants used in the traditional medicine are known as a rich source of chemically diverse compounds with relevant biological activities. In this work we analysed the chemical composition and the in vitro effects of EOs from leaves of Eugenia brejoensis (EBEO), Hyptis pectinata (HPEO), Hypenia salzmannii (HSEO), Lippia macrophylla (LMEO) and seeds of Syagrus coronata (SCEO) on Trypanosoma cruzi, the etiological agent of Chagas disease. The EOs were extracted through hydrodistillation and its chemical composition analysed by GC/MS...
December 4, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29215548/secondary-metabolic-profiles-of-two-cultivars-of-piper-nigrum-black-pepper-resulting-from-infection-by-fusarium-solani-f-sp-piperis
#16
Shirlley F M da Luz, Lydia F Yamaguchi, Massuo J Kato, Oriel F de Lemos, Luciana P Xavier, José Guilherme S Maia, Alessandra de R Ramos, William N Setzer, Joyce Kelly do R da Silva
Bragantina and Cingapura are the main black pepper (Piper nigrum L.) cultivars and the Pará state is the largest producer in Brazil with about 90% of national production, representing the third largest production in the world. The infection of Fusarium solani f. sp. piperis, the causal agent of Fusarium disease in black pepper, was monitored on the cultivars Bragantina (susceptible) and Cingapura (tolerant), during 45 days' post infection (dpi). Gas Chromatography-Mass spectrometry (GC-MS) analysis of the volatile concentrates of both cultivars showed that the Bragantina responded with the production of higher contents of α-bisabolol at 21 dpi and a decrease of elemol, mostly at 30 dpi; while Cingapura displayed an decrease of δ-elemene production, except at 15 dpi...
December 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29210794/effect-of-remote-ischemic-preconditioning-on-outcomes-in-adult-cardiac-surgery-a-systematic-review-and-meta-analysis-of-randomized-controlled-studies
#17
Jianfeng Xie, Xiwen Zhang, Jingyuan Xu, Zhongheng Zhang, Nathan J Klingensmith, Songqiao Liu, Chun Pan, Yi Yang, Haibo Qiu
BACKGROUND: Remote ischemic preconditioning (RIPC) has been demonstrated to prevent organ dysfunction in cardiac surgery patients. However, recent large, prospective, multicenter, randomized controlled trials (RCTs) had controversial results. Thus, a meta-analysis of RCTs was performed to investigate whether RIPC can reduce the incidence of acute myocardial infarction (AMI), acute kidney injury (AKI), and mortality in adult cardiac surgery patients. METHODS: Study data were collected from Medline, Elsevier, Cochrane Central Register of Controlled Trials and Web of Science databases...
November 22, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29207122/diallyl-disulfide-inhibits-the-metastasis-of-type-%C3%A2-esophageal%C3%A2-gastric-junction-adenocarcinoma-cells-via-nf-%C3%AE%C2%BAb-and-pi3k-akt-signaling-pathways-in-vitro
#18
Xiaoran Yin, Cheng Feng, Lili Han, Yinan Ma, Yang Jiao, Jun Wang, Lijun Jia, Fuchun Jing, Xiaoyan Gao, Yinbin Zhang, Jun Zhang
Esophageal-gastric junction adenocarcinoma (AEG) is an aggressive tumor with high incidence and dismal prognosis worldwide. Despite significant advances in therapeutic strategies, the 5-year survival rate still remains low. Diallyl disulfide (DADS), which is one of the major volatile components isolated from garlic, has been shown to have multi-targeted antitumor activities in a variety of cancer cells. However, the exact anti-metastatic effects and underlying molecular mechanisms of DADS in AEG have not been elucidated...
November 27, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29201024/involvement-of-the-transcriptional-coactivator-thmbf1-in-the-biocontrol-activity-of-trichoderma-harzianum
#19
M Belén Rubio, Alonso J Pardal, Rosa E Cardoza, Santiago Gutiérrez, Enrique Monte, Rosa Hermosa
Trichoderma harzianum is a filamentous fungus well adapted to different ecological niches. Owing to its ability to antagonize a wide range of plant pathogens, it is used as a biological control agent in agriculture. Selected strains of T. harzianum are also able to increase the tolerance of plants to biotic and abiotic stresses. However, little is known about the regulatory elements of the T. harzianum transcriptional machinery and their role in the biocontrol by this species. We had previously reported the involvement of the transcription factor THCTF1 in the T...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29194438/a-temporal-comparison-of-sex-aggregation-pheromone-gland-content-and-dynamics-of-release-in-three-members-of-the%C3%A2-lutzomyia-longipalpis%C3%A2-diptera-psychodidae-species-complex
#20
Mikel A González, Krishna K Bandi, Melissa J Bell, Reginaldo P Brazil, Erin Dilger, Angel Guerrero, Orin Courtenay, James G C Hamilton
BACKGROUND: Lutzomyia longipalpis is the South American vector of Leishmania infantum, the etiologic agent of visceral leishmaniasis (VL). Male L. longipalpis produce a sex-aggregation pheromone that is critical in mating, yet very little is known about its accumulation over time or factors involved in release. This laboratory study aimed to compare accumulation of pheromone over time and determine factors that might influence release in three members of the L. longipalpis species complex...
December 1, 2017: PLoS Neglected Tropical Diseases
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