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https://www.readbyqxmd.com/read/28917778/determination-of-volatile-organic-compounds-in-eucalyptus-fast-pyrolysis-bio-oil-by-full-evaporation-headspace-gas-chromatography
#1
Nathalya Kosinski Lima, André Romualdo Lopes, Palimecio Gimenes Guerrero, Carlos Itsuo Yamamoto, Fabricio Augusto Hansel
This paper reports a full evaporation (FE) headspace gas chromatographic (HS-GC) method for the determination of the volatile organic compounds (VOCs) in bio-oil (i.e. methanol, ethanol, acetone, acetic acid and furfural). The method uses a 4μL sample of bio-oil in a headspace vial (ca. 20mL). Complete evaporation of the compounds was achieved after seven minutes at 90°C. The method showed good precision and accuracy for methanol, ethanol, acetone and acetic acid. The recovery of furfural was low (74.3%)...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917748/selectivity-improvement-of-positive-photoionization-ion-mobility-spectrometry-for-rapid-detection-of-organophosphorus-pesticides-by-switching-dopant-concentration
#2
Qinghua Zhou, Jia Li, Bin Wang, Shuang Wang, Haiyang Li, Jinyuan Chen
Ion mobility spectrometry (IMS) opened a potential avenue for the rapid detection of organophosphorus pesticides (OPPs), though an improved selectivity of stand-alone IMS was still in high demand. In this study, a stand-alone positive photoionization ion mobility spectrometry (PP-IMS) apparatus was constructed for the rapid detection of OPPs with acetone as dopant. The photoionization of acetone molecules was induced by the ultraviolet irradiation to produce the reactant ions (Ac)2H(+), which were employed to ionize the OPPs including fenthion, imidan, phosphamidon, dursban, dimethoate and isocarbophos via the proton transfer reaction...
January 1, 2018: Talanta
https://www.readbyqxmd.com/read/28917670/morphological-characterization-and-biocontrol-effects-of-vibrio-vulnificus-phages-against-vibriosis-in-the-shrimp-aquaculture-environment
#3
P Srinivasan, P Ramasamy
The re-emerging field of phage therapy is the potential biocontrol agents for the transfer of virulence factor and to kill their bacterial hosts. In this study, the lytic Vibrio vulnificus phages were studied to provide a better understanding of phage-host interactions and development of phage therapy. Four new V. vulnificus phages were detected from shrimp aquaculture system, named VV1, VV2, VV3 and VV4. All lytic V. vulnificus phages are the Tecviruses of the family Tectiviridae with typical double layered elongated icosahedral head and tailless morphology...
September 13, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28917599/enantiomeric-separation-of-some-chiral-analytes-using-amylose-3-5-dimethylphenylcarbamate-covalently-immobilized-on-silica-by-nano-liquid-chromatography-and-capillary-electrochromatography
#4
Giovanni D'Orazio, Chiara Fanali, Marina Karchkhadze, Bezhan Chankvetadze, Salvatore Fanali
A new experimental chiral stationary phase containing amylose 3,5-dimethylphenylcarbamate immobilized onto silica gel (i-ADMPC) was packed in 100μm I.D. fused silica capillary and used for the chiral separation of eight selected flavanone derivatives in polar organic mobile phase by using different miniaturized techniques, such as nano-liquid chromatography (nano-LC), capillary electrochromatography (CEC) and pressure-assisted CEC (pCEC). A comparative study of different elution modes in terms of chromatographic efficiency, analysis time and enantiomeric resolution was carried out...
September 8, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28917545/effects-of-acarbose-on-cardiovascular-and-diabetes-outcomes-in-patients-with-coronary-heart-disease-and-impaired-glucose-tolerance-ace-a-randomised-double-blind-placebo-controlled-trial
#5
Rury R Holman, Ruth L Coleman, Juliana C N Chan, Jean-Louis Chiasson, Huimei Feng, Junbo Ge, Hertzel C Gerstein, Richard Gray, Yong Huo, Zhihui Lang, John J McMurray, Lars Rydén, Stefan Schröder, Yihong Sun, Michael J Theodorakis, Michal Tendera, Lynne Tucker, Jaakko Tuomilehto, Yidong Wei, Wenying Yang, Duolao Wang, Dayi Hu, Changyu Pan
BACKGROUND: The effect of the α-glucosidase inhibitor acarbose on cardiovascular outcomes in patients with coronary heart disease and impaired glucose tolerance is unknown. We aimed to assess whether acarbose could reduce the frequency of cardiovascular events in Chinese patients with established coronary heart disease and impaired glucose tolerance, and whether the incidence of type 2 diabetes could be reduced. METHODS: The Acarbose Cardiovascular Evaluation (ACE) trial was a randomised, double-blind, placebo-controlled, phase 4 trial, with patients recruited from 176 hospital outpatient clinics in China...
September 12, 2017: Lancet Diabetes & Endocrinology
https://www.readbyqxmd.com/read/28917542/break-point-instead-of-ace-acarbose-post-load-glycaemic-excursions-and-cardiovascular-events
#6
Michael A Nauck, Juris J Meier
No abstract text is available yet for this article.
September 12, 2017: Lancet Diabetes & Endocrinology
https://www.readbyqxmd.com/read/28916845/pharmacological-investigations-on-mast-cell-stabilizer-and-histamine-receptor-antagonists-in-vincristine-induced-neuropathic-pain
#7
Amteshwar Singh Jaggi, Gunjanpreet Kaur, Anjana Bali, Nirmal Singh
The present study was designed to investigate the role of mast cells and mast cell-derived histamine in vincristine-induced neuropathic pain. Neuropathic pain was induced by administration of vincristine (100 μg/kg, i.p.) over a period of 10 days, with a break of 2 days, and pain behavioural estimations including pin prick, hot plate and acetone spray tests were performed to assess mechanical and heat hyperalgesia and cold allodynia, respectively, on days 0, 14 and 28. Mast cell stabilizer, sodium cromoglycate, H1 receptor antagonist promethazine and H2 receptor antagonist ranitidine were administered over a period of 12 days...
September 15, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28915854/medical-therapy-following-hospitalization-for-heart-failure-with-reduced-ejection-fraction-and-association-with-discharge-to-long-term-care-a-cross-sectional-analysis-of-the-reasons-for-geographic-and-racial-differences-in-stroke-regards-population
#8
Emily B Levitan, Melissa K Van Dyke, Ligong Chen, Raegan W Durant, Todd M Brown, J David Rhodes, Olusola Olubowale, Oluwole Muyiwa Adegbala, Meredith L Kilgore, Justin Blackburn, Karen C Albright, Monika M Safford
BACKGROUND: Less intensive treatment for heart failure with reduced ejection fraction (HFrEF) may be appropriate for patients in long-term care settings because of limited life expectancy, frailty, comorbidities, and emphasis on quality of life. METHODS: We compared treatment patterns between REasons for Geographic And Racial Differences in Stroke (REGARDS) study participants discharged to long-term care versus home following HFrEF hospitalizations. We examined medical records and Medicare pharmacy claims for 147 HFrEF hospitalizations among 80 participants to obtain information about discharge disposition and medication prescriptions and fills...
September 16, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28915848/anemia-in-severe-heart-failure-patients-does-it-predict-prognosis
#9
Tamrat Befekadu Abebe, Eyob Alemayehu Gebreyohannes, Akshaya Srikanth Bhagavathula, Yonas Getaye Tefera, Tadesse Melaku Abegaz
BACKGROUND: Anemia is highly prevalent in heart failure (HF) patients. However, the prevalence, clinical impact and prognostic factor of anemia in heart failure patients is widely varies. The aim of this study was to evaluate the prevalence of anemia in patients with HF, to compare baseline clinical characteristic and outcomes of severe HF patients with and without anemia admitted to Gondar University Referral Hospital (GURH), Gondar, Ethiopia. METHOD: A retrospective cohort study was conducted and we assessed medical records of heart failure patients who were admitted Gondar University Referral Hospital in the period between December 02, 2010 and November 30, 2016...
September 16, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28915321/regulation-and-functions-of-the-renin-angiotensin-system-in-white-and-brown-adipose-tissue
#10
Mandana Pahlavani, Nishan S Kalupahana, Latha Ramalingam, Naima Moustaid-Moussa
The renin angiotensin system (RAS) is a major regulator of blood pressure, fluid, and electrolyte homeostasis. RAS precursor angiotensinogen (Agt) is cleaved into angiotensin I (Ang I) and II (Ang II) by renin and angiotensin converting enzyme (ACE), respectively. Major effects of Ang II, the main bioactive peptide of this system, is mediated by G protein coupled receptors, Angiotensin Type 1 (AGTR1, AT1R) and Type 2 (AGTR2, AT2R) receptors. Further, the discovery of additional RAS peptides such as Ang 1-7 generated by the action of another enzyme ACE2 identified novel functions of this complex system...
September 12, 2017: Comprehensive Physiology
https://www.readbyqxmd.com/read/28915252/expression-and-regulation-of-the-neutral-amino-acid-transporter-b0at1-in-rat-small-intestine
#11
Julia Jando, Simone M R Camargo, Brigitte Herzog, François Verrey
Absorption of neutral amino acids across the luminal membrane of intestinal enterocytes is mediated by the broad neutral amino acid transporter B0AT1 (SLC6A19). Its intestinal expression depends on co-expression of the membrane-anchored peptidase angiotensin converting enzyme 2 (ACE2) and is additionally enhanced by aminopeptidase N (CD13). We investigated in this study the expression of B0AT1 and its auxiliary peptidases as well as its transport function along the rat small intestine. Additionally, we tested its possible short- and long-term regulation by dietary proteins and amino acids...
2017: PloS One
https://www.readbyqxmd.com/read/28914730/family-and-environmental-influences-on-child-behavioral-health-the-role-of-neighborhood-disorder-and-adverse-childhood-experiences
#12
Xiafei Wang, Kathryn Maguire-Jack
OBJECTIVE: The Adverse Childhood Experiences study suggests childhood adversity is a "root" origin for health and human development. Newer research is examining the more immediate impact of adverse childhood experiences (ACEs) on child development and the impact of neighborhood environment on the likelihood of and prevention ACEs. The extent to which all of these aspects of the child context fit together remains unclear. The current study seeks to fill this gap examining the precursors for ACEs and the multitude of ways in which a child's home life can impact his or her development...
September 7, 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28913755/management-and-clinical-outcome-of-stable-coronary-artery-disease-in-austria-results-from-5%C3%A2-years-of-the-clarify-registry
#13
Irene M Lang, Roza Badr-Eslam, Nicola Greenlaw, Robin Young, Philippe Gabriel Steg
BACKGROUND: The population of patients with established coronary artery disease (CAD) is growing because of an improvement in outcomes and survival from acute disease episodes. Nevertheless, these patients remain at high risk of cardiovascular events. Thus, CAD management is important in prevention of disease progression. The objective of this analysis was to describe disease management and clinical outcome of Austrian outpatients with stable CAD over 5 years by using data from the international CLARIFY registry...
September 14, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28913006/uhplc-pda-assay-for-simultaneous-determination-of-vitamin-d3-and-menaquinone-7-in-pharmaceutical-solid-dosage-formulation
#14
Muhammad Jehangir, Mahmood Ahmed, Muhammad Imtiaz Shafiq, Abdul Samad, Iftikhar-Ul-Haq
A newly developed method based on ultrahigh performance liquid chromatography (UHPLC) was optimized for the simultaneous determination of vitamin D3 and menaquinone-7 (MK-7) in tablet formulation in the present study. UHPLC separation of vitamin D3 and MK-7 was performed with ACE Excel 2 C18-PFP column (2 μm, 2.1 × 100 mm) at 0.6 mL min(-1) flow rate, whereas the mobile phase consisted of methanol/water (19 : 1, v/v, phase A) and isopropyl alcohol (99.9%, phase B) containing 0.5% triethylamine. Isocratic separation of both the analytes was performed at 40°C by pumping the mobile phases A and B in the ratio of 50 : 50 (v/v, pH, 6...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/28912299/the-test-your-memory-for-mild-cognitive-impairment-tym-mci
#15
Jeremy M Brown, Claire J Lansdall, Julie Wiggins, Kate E Dawson, Kristina Hunter, James B Rowe, Richard A Parker
BACKGROUND: To validate a short cognitive test: the Test Your Memory for Mild Cognitive Impairment (TYM-MCI) in the diagnosis of patients with amnestic mild cognitive impairment or mild Alzheimer's disease (aMCI/AD). METHODS: Two hundred and two patients with mild memory problems were recruited. All had 'passed' the Mini-Mental State Examination (MMSE). Patients completed the TYM-MCI, the Test Your Memory test (TYM), MMSE and revised Addenbrooke's Cognitive Examination (ACE-R), had a neurological examination, clinical diagnostics and multidisciplinary team review...
September 14, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/28911735/antifungal-activity-of-sterols-and-dipsacus-saponins-isolated-from-dipsacus-asper-roots-against-phytopathogenic-fungi
#16
Nam Hee Choi, Ja Yeong Jang, Gyung Ja Choi, Yong Ho Choi, Kyoung Soo Jang, Van Thu Nguyen, Byung-Sun Min, Quang Le Dang, Jin-Cheol Kim
The in vivo antifungal activity of crude extracts of Dipsacus asper roots was evaluated against the phytopathogenic fungi Botrytis cinerea, Colletotrichum coccodes, Blumeria graminis f. sp. hordei, Magnaporthe grisea, Phytophthora infestans, Puccinia recondita and Rhizoctonia solani using a whole-plant assay method. Ethyl acetate and acetone extracts, at 1000μg/mL, suppressed the development of tomato gray mold (TGM) and tomato late blight (TLB) by 90%. Through bioassay-guided isolation, five antifungal substances were isolated from the D...
September 2017: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/28911306/management-of-blood-pressure-and-heart-rate-in-patients-with-diabetes-mellitus
#17
Ioanna Gouni-Berthold, Ruth Hanssen, Lisa Ravarani, Heiner K Berthold
BACKGROUND: In patients with diabetes mellitus (DM) there is a clear association between blood pressure (BP) levels and macrovascular and microvascular complications. However, the BP targets that need to be achieved for optimal outcomes remain controversial. METHODS: The purpose of this narrative review is to discuss BP targets and management in patients with DM. The subject of elevated heart rate, which has been associated with mortality in many populations, and which is observed in some patients with DM will also be addressed...
June 8, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28911245/recent-advances-on-conversion-and-co-production-of-acetone-butanol-ethanol-into-high-value-added-bioproducts
#18
Fengxue Xin, Weiliang Dong, Yujia Jiang, Jiangfeng Ma, Wenming Zhang, Hao Wu, Min Zhang, Min Jiang
Butanol is an important bulk chemical and has been regarded as an advanced biofuel. Large-scale production of butanol has been applied for more than 100 years, but its production through acetone-butanol-ethanol (ABE) fermentation process by solventogenic Clostridium species is still not economically viable due to the low butanol titer and yield caused by the toxicity of butanol and a by-product, such as acetone. Renewed interest in biobutanol as a biofuel has spurred technological advances to strain modification and fermentation process design...
September 14, 2017: Critical Reviews in Biotechnology
https://www.readbyqxmd.com/read/28910674/the-inhibitory-activity-of-hl-7-and-hl-10-peptide-from-scorpion-venom-hemiscorpius-lepturus-on-angiotensin-converting-enzyme-kinetic-and-docking-study
#19
Zahra Setayesh-Mehr, Ahmad Asoodeh
The hypertension is one of the highest risk factors for stroke, myocardial infarction, vascular disease and chronic kidney disease. Angiotensin converting enzyme (ACE) has an important role in the physiological regulation of cardiovascular system. ACE inhibition is a key purpose for hypertension treatment. In this study, two peptides named HL-7 with the sequence of YLYELAR (MW: 927.07Da) and HL-10 with the sequence of AFPYYGHHLG (MW: 1161.28Da) were identified from scorpion venom of H. lepturus. The inhibitory activity of HL-7 and HL-10 was examined on rabbit ACE...
September 7, 2017: Bioorganic Chemistry
https://www.readbyqxmd.com/read/28910648/biochar-for-volatile-organic-compound-voc-removal-sorption-performance-and-governing-mechanisms
#20
Xueyang Zhang, Bin Gao, Yulin Zheng, Xin Hu, Anne Elise Creamer, Michael D Annable, Yuncong Li
Sorption is one of the most efficient and low cost strategies for volatile organic compound (VOC) removal, but VOC sorption by biochar has seen limited research. In this work, gas phase sorption experiments were conducted to determine the sorption potential and mechanisms of VOCs onto biochar. A total of 15 biochars produced from 5 common feedstocks at 300, 450, and 600°C were evaluated as sorbents. Three common VOCs (acetone, cyclohexane, and toluene) were chosen as sorbates. The results showed that all the tested biochars had VOC sorption capacity in the range of 5...
September 5, 2017: Bioresource Technology
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