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https://www.readbyqxmd.com/read/28436685/factors-affecting-the-performance-of-horizontal-flow-constructed-treatment-wetland-vegetated-with-cyperus-papyrus-for-municipal-wastewater-treatment
#1
Sohair I Abou-Elela, Mohamed A Elekhnawy, Magdy T Khalil, Mohamed S Hellal
The effect of hydraulic loading rate (HLR) and hydraulic retention time (HRT) on the bioremediation of municipal wastewater using a pilot scale subsurface horizontal flow constructed treatment wetland (HFCTW) vegetated with Cyprus papyrus was investigated. Three different HLRs were applied to the treatment system namely; 0.18, 0.10 and 0.07 m(3)/m(2). d with corresponding HRTs of 1.8, 3.2 and 4.7 days, respectively. The flow rate was 8 m(3)/ d and the average organic loading rate (OLR) was 0.037 kg BOD/m(3)/d...
April 24, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28433940/a-novel-dual-ratiometric-response-fluorescent-probe-for-so2-clo-detection-in-cells-and-in%C3%A2-vivo-and-its-application-in-exploring-the-dichotomous-role-of-so2-under-the-clo-induced-oxidative-stress
#2
Kun Dou, Qiang Fu, Guang Chen, Fabiao Yu, Yuxia Liu, Ziping Cao, Guoliang Li, Xianen Zhao, Lian Xia, Lingxin Chen, Hua Wang, Jinmao You
Intracellular reactive sulfur species and reactive oxygen species play vital roles in immunologic mechanism. As an emerging signal transmitter, SO2 can be generated as the anti-oxidant, while SO2 is also a potential oxidative stress-inducer in organism. Aiming to elucidate in-depth the dichotomous role of SO2 under oxidative stress, we designed a dual-response fluorescent probe that enabled the respective or successive detection of SO2 and ClO(-). The probe itself emits the red fluorescence (625 nm) which can largely switch to blue (410 nm) and green fluorescence (500 nm) respectively in response to SO2 and ClO(-), allowing the highly selective and accurate ratiometric quantification for both SO2 and ClO(-) in cells...
April 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/28433594/favouring-no-over-h2o2-production-will-increase-pb-tolerance-in-prosopis-farcta-via-altered-primary-metabolism
#3
Somaieh Zafari, Mohsen Sharifi, Luis A J Mur, Najmeh Ahmadian Chashmi
Reactive oxygen species (ROS) and nitric oxide (NO) are known in triggering defense functions to detoxify heavy metal stresses. To investigate the relevance of ROS production, Pb treatment (400µM) alone and in combination with 400µM sodium ascorbate (Asc: as H2O2 scavenger) were given to hydroponically grown Prosopis farcta seedlings over a time course of 72h. Data presented here indicate that, the low extent of H2O2 due to scavenging by ascorbate, together with high level of NO improved Pb+Asc- treated Prosopis growth...
April 20, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28432538/superoxide-generated-in-the-chloroplast-stroma-causes-photoinhibition-of-photosystem-i-in-the-shade-establishing-tree-species-psychotria-henryi
#4
Wei Huang, Ying-Jie Yang, Jiao-Lin Zhang, Hong Hu, Shi-Bao Zhang
Our previous studies indicated that high light induced significant photoinhibition of photosystem I (PSI) in the shade-establishing tree species Psychotria henryi. However, the underlying mechanism has not been fully clarified. In the present study, in order to investigate the mechanism of PSI photoinhibition in P. henryi, we treated detached leaves with constant high light in the presence of methyl viologen (MV) or a soluble α-tocopherol analog, 2,2,5,7,8-pentamethyl-6-chromanol (PMC). We found that MV significantly depressed photochemical quantum yields in PSI and PSII when compared to PMC...
April 21, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28432510/epilithic-diatom-assemblages-and-their-relationships-with-environmental-variables-in-the-nil%C3%A3-fer-stream-basin-bursa-turkey
#5
Didem Karacaoğlu, Nurhayat Dalkıran
Patterns of epilithic diatom species distribution in relation to environmental variables from 12 sampling sites on the main stream and some of its tributaries in the Nilüfer Stream Basin were determined using multivariate statistical techniques. The stream basin has been heavily influenced by anthropogenic effects. The upper part of the basin that is distant from pollution sources mostly has a spring water quality, while the lower part where the stream flows through the urban area and receives domestic and industrial wastewater has a quite low quality...
May 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28432155/interactive-effects-of-oxygen-carbon-dioxide-and-flow-on-photosynthesis-and-respiration-in-the-scleractinian-coral-galaxea-fascicularis
#6
Ronald Osinga, Marlous Derksen-Hooijberg, Tim Wijgerde, Johan A J Verreth
Rates of dark respiration and net photosynthesis were measured on six replicate clonal fragments of the stony coral Galaxea fascicularis (Linnaeus 1767), which were incubated under twelve different combinations of dissolved oxygen (20%, 100% and 150% saturation), dissolved carbon dioxide (9.5 and 19.1 μmol L(-1)) and water flow (1-1.6 cm s(-1) versus 4-13 cm s(-1)) in a repeated measures design. Dark respiration was enhanced by increased flow and increased oxygen saturation in an interactive way, which relates to improved oxygen influx into the coral tissue...
April 21, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28431006/regulation-of-oxidized-platelet-lipidome-implications-for-coronary-artery-disease
#7
Madhumita Chatterjee, Dominik Rath, Jörg Schlotterbeck, Johannes Rheinlaender, Britta Walker-Allgaier, Nada Alnaggar, Monika Zdanyte, Iris Müller, Oliver Borst, Tobias Geisler, Tilman E Schäffer, Michael Lämmerhofer, Meinrad Gawaz
Aims: Hyperlipidaemia enhances susceptibility to thrombosis, while platelet oxidixed LDL (oxLDL) binding in acute coronary syndrome (ACS) correlates with activation status. This study explores the platelet lipidome in symptomatic coronary artery disease (CAD) patients and the functional consequences of the chemokine CXCL12 and its receptors CXCR-4/-7 on lipid uptake in platelets. Methods and results: Platelet-oxLDL detected by flow cytometry was enhanced (P = 0...
April 18, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28429603/effect-of-high-flow-nasal-cannula-oxygen-therapy-versus-conventional-oxygen-therapy-and-noninvasive-ventilation-on-reintubation-rate-in-adult-patients-after-extubation-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#8
Hua-Wei Huang, Xiu-Mei Sun, Zhong-Hua Shi, Guang-Qiang Chen, Lu Chen, Jan O Friedrich, Jian-Xin Zhou
PURPOSE: We conducted a systematic review and meta-analysis of randomized controlled trials (RCTs) to evaluate the effect of high-flow nasal cannula (HFNC) on reintubation in adult patients. PROCEDURES: Ovid Medline, Embase, and Cochrane Database of Systematic Reviews were searched up to November 1, 2016, for RCTs comparing HFNC versus conventional oxygen therapy (COT) or noninvasive ventilation (NIV) in adult patients after extubation. The primary outcome was reintubation rate, and the secondary outcomes included complications, tolerance and comfort, time to reintubation, length of stay, and mortality...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/28429120/the-influence-of-pump-rotation-speed-on-hemodynamics-and-myocardial-oxygen-metabolism-in-left-ventricular-assist-device-support-with-aortic-valve-regurgitation
#9
Kei Iizuka, Tomohiro Nishinaka, Yoshiaki Takewa, Kenji Yamazaki, Eisuke Tatsumi
Aortic valve regurgitation (AR) is a serious complication under left ventricular assist device (LVAD) support. AR causes LVAD-left ventricular (LV) recirculation, which makes it difficult to continue LVAD support. However, the hemodynamics and myocardial oxygen metabolism of LVAD support with AR have not been clarified, especially, how pump rotation speed influences them. An animal model of LVAD with AR was newly developed, and how pump rotation speed influences hemodynamics and myocardial oxygen metabolism was examined in acute animal experiments...
April 20, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28425965/comparison-of-cpap-and-hfnc-in-management-of-bronchiolitis-in-infants-and-young-children
#10
Majken Bisgaard Pedersen, Signe Vahlkvist
Continuous positive airway pressure (CPAP) has been used in infants with bronchiolitis for decades. Recently, high flow nasal cannula (HFNC) therapy was introduced We conducted a retrospective study of treatment with CPAP vs. HFNC between 2013 and 2015, comparing the development in respiratory rate, fraction of inspired oxygen (FiO2) and heart rate, treatment failure, duration of treatment, and length of hospital stay. A sample size of 49 children were included. Median age was 1.9 months. Median baseline pCO₂ was 7...
April 20, 2017: Children
https://www.readbyqxmd.com/read/28425701/the-effects-of-glutamate-receptor-activation-on-local-oxygen-changes
#11
Lindsay Walton, Nick G Boustead, Susan Carroll, R Mark Wightman
Glutamate is ubiquitous throughout the brain and serves as the primary excitatory neurotransmitter. Neurons require energy to fire, and energetic substrates (i.e., O2, glucose) are renewed via cerebral blood flow (CBF) to maintain metabolic homeostasis. Magnetic resonance brain functionality studies rely on the assumption that CBF and neuronal activity are coupled consistently throughout the brain; however, the origin of neuronal activity does not always coincide with signals indicative of energy consumption (e...
April 20, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28424884/principle-and-basic-property-of-the-sequential-flow-pump
#12
Shintaro Hara, Erina Maeno, Xinyang Li, Terumi Yurimoto, Takashi Isoyama, Itsuro Saito, Toshiya Ono, Yusuke Abe
In the emergency care field, early treatment of acute heart or respiratory failure has been a global concern. In severe cases, patients are frequently required to be on an extracorporeal membrane oxygenator (ECMO) life support. To make the ECMO system more compact and portable, we proposed a sequential flow-type centrifugal pump named the sequential flow pump (SFP). In this study, principle and basic properties of this novel blood pump were examined by computational fluid dynamic (CFD) analysis and an experimental model...
April 19, 2017: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/28423651/succinate-dehydrogenase-b-deficient-cancer-cells-are-highly-sensitive-to-bromodomain-and-extra-terminal-inhibitors
#13
Satoshi Kitazawa, Shunsuke Ebara, Ayumi Ando, Yuji Baba, Yoshinori Satomi, Tomoyoshi Soga, Takahito Hara
Mutations in succinate dehydrogenase B (SDHB) gene are frequently observed in several tumors and associated with poor prognosis in these tumors. Therefore, drugs effective for SDHB-deficient tumors could fulfill an unmet medical need. In addition, such drugs would have an advantage in that selection of patients with SDHB-mutant cancer could increase the probability of success in clinical trials. Currently, however, the characteristics of SDHB-deficient cancers are not completely understood. Here, we established SDHB knockout cancer cell lines from human colon cancer HCT116 cells using the clustered regularly interspaced short palindromic repeat (CRISPR)/Cas9 knockout system, and clarified its metabolic characteristics...
March 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28421733/beyond-high-flow-oxygen-therapy-to-manage-hazards-of-intubation-and-prevent-desaturation
#14
Fabrizio Monaco, Chiara Vitiello, Fabio Guarracino
No abstract text is available yet for this article.
April 19, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28421191/prospective-multicentre-study-on-the-epidemiology-and-current-therapeutic-management-of-severe-bronchiolitis-in-spain
#15
Jose C Flores-González, Juan Mayordomo-Colunga, Iolanda Jordan, Alicia Miras-Veiga, Cristina Montero-Valladares, Marta Olmedilla-Jodar, Andrés J Alcaraz-Romero, Miren Eizmendi-Bereciartua, Francisco Fernández-Carrión, Carmen Santiago-Gutierrez, Esther Aleo-Luján, Sonia Pérez-Quesada, Cristina Yun-Castilla, Carmen Martín, Álvaro Navarro-Mingorance, Concha Goñi-Orayen
Objective. To determine the epidemiology and therapeutic management of patients with severe acute bronchiolitis (AB) admitted to paediatric intensive care units (PICUs) in Spain. Design. Descriptive, prospective, multicentre study. Setting. Sixteen Spanish PICUs. Patients. Patients with severe AB who required admission to any of the participating PICUs over 1 year. Interventions. Both epidemiological variables and medical treatment received were recorded. Results. A total of 262 patients were recruited; 143 were male (54...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28418078/induction-of-mitochondrial-apoptotic-pathway-in-triple-negative-breast-carcinoma-cells-by-methylglyoxal-via-generation-of-reactive-oxygen-species
#16
Anirban Roy, Manisha Ahir, Saurav Bhattacharya, Pravat Kumar Parida, Arghya Adhikary, Kuladip Jana, Manju Ray
Triple negative breast cancer (TNBC) tends to form aggressive tumors associated with high mortality and morbidity which urge the need for development of new therapeutic strategies. Recently the normal metabolite Methylglyoxal (MG) has been documented for its anti-proliferative activity against human breast cancer. However, the mode of action of MG against triple negative breast cancer remains open to question. In our study, we investigated the anticancer activity of MG in MDA MB 231 and 4T1 TNBC cell lines and elucidated the underlying mechanisms...
April 18, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28417646/cerebral-hemodynamic-assessment-and-neuroimaging-across-the-lifespan-in-sickle-cell-disease
#17
Lori C Jordan, Michael R DeBaun
Children and adults with sickle cell anemia (SCA) have a higher risk of strokes compared to age- and race-matched peers. Velocity in the middle cerebral or distal internal carotid artery as measured by transcranial Doppler ultrasound is a recognized method to identify children but not adults with SCA at high-risk for first stroke. For both children and adults with SCA that have had a stroke, no methods clearly identify individuals at highest risk of recurrent strokes or an initial silent stroke, the most common neurological injury...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28416813/brain-derived-neurotrophic-factor-val-66-met-genotype-and-ovarian-steroids-interactively-modulate-working-memory-related-hippocampal-function-in-women-a-multimodal-neuroimaging-study
#18
S-M Wei, E B Baller, P D Kohn, J S Kippenhan, B Kolachana, S J Soldin, D R Rubinow, P J Schmidt, K F Berman
Preclinical evidence suggests that the actions of ovarian steroid hormones and brain-derived neurotrophic factor (BDNF) are highly convergent on brain function. Studies in humanized mice document an interaction between estrus cycle-related changes in estradiol secretion and BDNF Val(66)Met genotype on measures of hippocampal function and anxiety-like behavior. We believe our multimodal imaging data provide the first demonstration in women that the effects of the BDNF Val/Met polymorphism on hippocampal function are selectively modulated by estradiol...
April 18, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28416582/relationship-between-oxygen-concentration-and-temperature-in-an-exothermic-warming-device
#19
Ben Brooks, Charles D Deakin
INTRODUCTION: Actively warming hypothermic patients or preventing hypothermia is critical in optimising outcomes in patients with traumatic injuries. Our aim was to investigate the effect of ambient oxygen concentration on the rate and change in temperature of the TechTrade Ready-Heat II exothermic (oxygen-activated) warming blanket, to evaluate safety and ascertain the risk of thermal injury. METHODS: A mannequin covered with an exothermic blanket was placed in a sealed oxygen tent...
April 17, 2017: Emergency Medicine Journal: EMJ
https://www.readbyqxmd.com/read/28416543/potential-toxicity-of-polymyxins-in-human-lung-epithelial-cells
#20
Maizbha U Ahmed, Tony Velkov, Yu-Wei Lin, Bo Yun, Cameron J Nowell, Fanfan Zhou, Qi Tony Zhou, Kim Chan, Mohammad A K Azad, Jian Li
Inhaled polymyxins are of considerable utility to achieve optimal exposure in the respiratory tract for the treatment of lung infections caused by multidrug-resistant Gram-negative pathogens. Current inhaled polymyxin therapy is empirical and often high doses are used which may lead to potential pulmonary adverse effects. This study aimed to investigate the effect of polymyxins on human lung epithelial cells (A549). Viability of A549 cells was examined after treatment with polymyxins using flow cytometry. Activation of caspase-3, -8, -9, expression of Fas ligand (FasL), loss of mitochondrial membrane potential and mitochondrial oxidative stress induced by polymyxin B was evaluated...
April 17, 2017: Antimicrobial Agents and Chemotherapy
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