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Ferric fang

Robin Patel, Ferric C Fang
Recent advances in microbial diagnostics are providing clinicians with information about microbes causing infections and their resistance to antimicrobial agents more rapidly than ever before. Diagnostic stewardship refers to the appropriate use of laboratory testing to guide patient management, including treatment, in order to optimize clinical outcomes and limit the spread of antimicrobial resistance. Fulfilling the promise of diagnostic stewardship requires a seamless partnership between clinical laboratories, pharmacists, and infectious diseases clinicians, so that appropriate tests are ordered and diagnostic information is translated into appropriate management in real time...
March 14, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
Shunli Liu, Kewen Li, Imtiaz Hussain, Olayinka Oderinde, Fang Yao, Jiuyang Zhang, Guo Dong Fu
Mechanically-tough and electrical conductive self-healing hydrogels may have broad applications in wearable electronics, health-monitoring systems, and smart robotics in the following years. Here, we proposed a new design strategy to synthesize a dual physical cross-linked polyethylene glycol/poly(acrylic acid) (PEG/PAA) double network hydrogel, consisting of an ferric ions cross-linked linear chain extension of PEG (2, 6-pyridinedicarbonyl moieties incorporated in the PEG backbone, PEG-H2pdca) as the first physical network and a PAA-Fe3+ gel as the second physical network...
March 13, 2018: Chemistry: a European Journal
Fang Luan, Lijie Wei, Jingjing Zhang, Wenqiang Tan, Yuan Chen, Fang Dong, Qing Li, Zhanyong Guo
Chitosan (CS) is an abundant and renewable polysaccharide that is reported to exhibit a great variety of beneficial properties. However, the poor solubility of chitosan in water limits its applications. In this paper, we successfully synthesized single N -quaternized (QCS) and double N -diquaternized (DQCS) chitosan derivatives, and the resulting quaternized materials were water-soluble. The degree of quaternization (DQ) of QCS and DQCS was 0.8 and 1.3, respectively. These derivatives were characterized by FTIR, ¹H NMR,13 C NMR, TGA, and SEM...
February 26, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Yili Fang, Weizhao Yin, Yanbin Jiang, Hengjun Ge, Ping Li, Jinhua Wu
In this study, a sequential Fe0 /H2 O2 reaction and biological process was employed as a low-cost depth treatment method to remove recalcitrant compounds from coal-chemical engineering wastewater after regular biological treatment. First of all, a chemical oxygen demand (COD) and color removal efficiency of 66 and 63% was achieved at initial pH of 6.8, 25 mmol L-1 of H2 O2 , and 2 g L-1 of Fe0 in the Fe0 /H2 O2 reaction. According to the gas chromatography-mass spectrometer (GC-MS) and gas chromatography-flame ionization detector (GC-FID) analysis, the recalcitrant compounds were effectively decomposed into short-chain organic acids such as acetic, propionic, and butyric acids...
February 27, 2018: Environmental Science and Pollution Research International
Arturo Casadevall, Ferric C Fang
Elegance is a prized quality in science that is associated with simplicity and explanatory power. This essay considers the qualities that make a scientific model, experiment, method, or theory "elegant," with a focus on the life sciences. We propose a definition of elegance that includes clarity, cleverness, correctness, explanatory power, parsimony, and beauty. The pursuit of elegance can improve the quality of science, but elegance must be pursued with caution, as the truth is sometimes inelegant...
February 20, 2018: MBio
Daniele Fanelli, Rodrigo Costas, Ferric C Fang, Arturo Casadevall, Elisabeth M Bik
It is commonly hypothesized that scientists are more likely to engage in data falsification and fabrication when they are subject to pressures to publish, when they are not restrained by forms of social control, when they work in countries lacking policies to tackle scientific misconduct, and when they are male. Evidence to test these hypotheses, however, is inconclusive due to the difficulties of obtaining unbiased data. Here we report a pre-registered test of these four hypotheses, conducted on papers that were identified in a previous study as containing problematic image duplications through a systematic screening of the journal PLoS ONE...
February 19, 2018: Science and Engineering Ethics
Michelle C Sabo, Jim Boonyaratanakornkit, Robert Cybulski, Noam E Kopmar, Rosario V Freeman, Ferric C Fang, Susan M Graham
Infection with Helicobacter cinaedi can encompass a wide spectrum of clinical manifestations, including fever, rash, endocarditis, osteomyelitis, and meningitis. The present case demonstrates the ability of H cinaedi to masquerade as acute rheumatic fever and represents the first reported case of cardiac tamponade caused by H cinaedi .
January 2018: Open Forum Infectious Diseases
Fang Yan, Xueqing Yu, Yingjun Jing
In this study, chitooligosaccharide (COS) and glycine (Gly) were selected to prepare Maillard reaction products, which were designated COS-Gly-MRPs. Changes in the FTIR and fluorescence spectra confirmed the formation of the COS-Gly-MRPs. Using ferric reducing antioxidant power (FRAP) as a response, the optimal reaction conditions, i.e., a time of 107 min, temperature of 121 °C, pH of 6.0, and nCOS:nGly = 2.5:1, were obtained by one-variable-at-a-time method and by response surface methodology. The resulting COS-Gly-MRPs exhibited much stronger antioxidant activity than their substrates...
February 2018: Journal of Food Science and Technology
Tee Joo Yeo, Poh Shuan Daniel Yeo, Farid Abdul Hadi, Timothy Cushway, Kim Yee Lee, Fang Fang Yin, Anne Ching, Ruili Li, Seet Yoong Loh, Shir Lynn Lim, Raymond Ching-Chiew Wong, Bee Choo Tai, Arthur Mark Richards, Carolyn S P Lam
AIMS: Iron deficiency is highly prevalent in Southeast Asians with heart failure (HF) and associated with worse outcomes. This trial aimed to assess the effect of intravenous iron in Southeast Asians hospitalized with decompensated HF. METHODS AND RESULTS: Fifty patients hospitalized for acute decompensated HF, regardless of ejection fraction, with iron deficiency (defined as serum ferritin <300 ng/mL if transferrin saturation is <20%) were randomized to receive either one dose of intravenous ferric carboxymaltose (FCM) 1000 mg or placebo (0...
January 18, 2018: ESC Heart Failure
Arturo Casadevall, Ferric C Fang
No abstract text is available yet for this article.
December 19, 2017: MBio
Ferric C Fang, Robin Patel
No abstract text is available yet for this article.
November 29, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
Fang Wang, Wei Sun, Chungu Xia, Yong Wang
Through the introduction of dimethylamino (Me2N) substituent at the pyridine ring of 2-((R)-2-[(R)-1-(pyridine-2-ylmethyl)pyrrolidin-2-yl]pyrrolidin-1-ylmethyl)pyridine (PDP) ligand, the non-heme Fe(II)((Me2N)PDP)/H2O2/AcOH catalyst system was found to exhibit significant higher catalytic activity and enantioselectivity than the non-substituent one in the asymmetric epoxidation experiments. The mechanistic origin of the remarkable substituent effects in these oxidation reactions has not been well established...
October 2017: Journal of Biological Inorganic Chemistry: JBIC
Jasmine M Pando, Joyce E Karlinsey, Jimmie C Lara, Stephen J Libby, Ferric C Fang
The Rcs phosphorelay and Psp (phage shock protein) systems are envelope stress responses that are highly conserved in gammaproteobacteria. The Rcs regulon was found to be strongly induced during metal deprivation of Salmonella enterica serovar Typhimurium lacking the Psp response. Nineteen genes activated by the RcsA-RcsB response regulator make up an operon responsible for the production of colanic acid capsular polysaccharide, which promotes biofilm development. Despite more than half a century of research, the physiological function of colanic acid has remained elusive...
June 6, 2017: MBio
Manfred Nairz, Andrea Schroll, David Haschka, Stefanie Dichtl, Piotr Tymoszuk, Egon Demetz, Patrizia Moser, Hubertus Haas, Ferric C Fang, Igor Theurl, Günter Weiss
Genetic and dietary forms of iron overload have distinctive clinical and pathophysiological features. HFE-associated hereditary hemochromatosis is characterized by overwhelming intestinal iron absorption, parenchymal iron deposition, and macrophage iron depletion. In contrast, excessive dietary iron intake results in iron deposition in macrophages. However, the functional consequences of genetic and dietary iron overload for the control of microbes are incompletely understood. Using Hfe +/+ and Hfe -/- mice in combination with oral iron overload in a model of Salmonella enterica serovar Typhimurium infection, we found animals of either genotype to induce hepcidin antimicrobial peptide expression and hypoferremia following systemic infection in an Hfe-independent manner...
2017: Frontiers in Cellular and Infection Microbiology
Ferric C Fang
No abstract text is available yet for this article.
July 2017: Infection and Immunity
Emily S Ford, David J Horne, Javeed A Shah, Carolyn K Wallis, Ferric C Fang, Thomas R Hawn
RATIONALE: Nontuberculous mycobacteria (NTM) are a diverse group of environmental organisms that infrequently cause human disease. Understanding of the epidemiologic and clinical characteristics associated with NTM disease is needed to refine diagnostic and treatment strategies, particularly among the less commonly isolated species. OBJECTIVES: To improve knowledge of geographic variance of NTM species, to correlate detailed clinical information with isolation of specific NTM, and to examine the decision to treat and outcomes for specific NTM...
July 2017: Annals of the American Thoracic Society
Hao Wang, Peng An, Enjun Xie, Qian Wu, Xuexian Fang, Hong Gao, Zhuzhen Zhang, Yuzhu Li, Xudong Wang, Jiaying Zhang, Guoli Li, Lei Yang, Wei Liu, Junxia Min, Fudi Wang
Ferroptosis is a recently identified iron-dependent form of nonapoptotic cell death implicated in brain, kidney, and heart pathology. However, the biological roles of iron and iron metabolism in ferroptosis remain poorly understood. Here, we studied the functional role of iron and iron metabolism in the pathogenesis of ferroptosis. We found that ferric citrate potently induces ferroptosis in murine primary hepatocytes and bone marrow-derived macrophages. Next, we screened for ferroptosis in mice fed a high-iron diet and in mouse models of hereditary hemochromatosis with iron overload...
August 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
James F Cowan, Aldine S Chandler, Elizabeth Kracen, David R Park, Carolyn K Wallis, Emelline Liu, Chao Song, David H Persing, Ferric C Fang
Background: Microscopic examination of acid-fast-stained sputum smears is the current standard of care in the United States to determine airborne infection isolation (AII) of inpatients with presumptive pulmonary tuberculosis (PTB). However, nucleic acid amplification testing (NAAT) with the Xpert MTB/RIF assay (Xpert) may be more efficient and less costly. Methods: This prospective observational cohort study enrolled a consecutive sample of 318 AII-eligible inpatients from a public hospital in Seattle, Washington, from March 2012 to October 2013...
February 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
Ferric C Fang, Arturo Casadevall
No abstract text is available yet for this article.
February 2017: Infection and Immunity
Ferric C Fang, Christopher R Polage, Mark H Wilcox
INTRODUCTIONIn 2010, we published an initial Point-Counterpoint on the laboratory diagnosis of Clostridium difficile infection (CDI). At that time, nucleic acid amplification tests (NAATs) were just becoming commercially available, and the idea of algorithmic approaches to CDI was being explored. Now, there are numerous NAATs in the marketplace, and based on recent proficiency test surveys, they have become the predominant method used for CDI diagnosis in the United States. At the same time, there is a body of literature that suggests that NAATs lack clinical specificity and thus inflate CDI rates...
March 2017: Journal of Clinical Microbiology
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