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https://www.readbyqxmd.com/read/28815586/differential-interference-contrast-photothermal-microscopy-in-nanospace-impacts-of-systematic-parameters
#1
M Liu
Differential interference contrast-photothermal microscopy (DIC-PTM), as a promising tool for trace analysis of nonfluorescent compounds, suffered low sensitivity in nanospace especially for aqueous samples, due to the poor thermophysical property of water and the unoptimised configuration. To improve its performance, a five-layer DIC-PTM model is built and influences of different parameters on the photothermal signal are investigated. The initial phase shift φ0 between two branches of the probe beam is found to be a key factor determining the detection sensitivity and response linearity: at a large φ0 (≤π/2) both a high sensitivity and a good linearity can be achieved, while a high signal-to-noise ratio occurs at a small φ0 ...
August 16, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28813138/quantifying-lake-water-quality-evolution-coupled-geochemistry-hydrodynamics-and-aquatic-ecology-in-an-acidic-pit-lake
#2
S Ursula Salmon, Matthew R Hipsey, Geoffrey W Wake, Gregory N Ivey, Carolyn E Oldham
Assessment of water quality evolution in the thousands of existing and future mine pit lakes worldwide requires new numerical tools that integrate geochemical, hydrological, and biological processes. A coupled model was used to test alternative hypothesized controls on water quality in a pit lake over ∼8 years. The evolution of pH, Al, and Fe were closely linked; field observations were reproduced with generic solubility equilibrium controls on Fe(III) and Al and a commonly reported acceleration of the abiotic Fe(II) oxidation rate by 2-3 orders of magnitude...
August 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28812000/diagnostic-imaging-features-of-necrotizing-enterocolitis-a-narrative-review
#3
REVIEW
Francesco Esposito, Rosanna Mamone, Marco Di Serafino, Carmela Mercogliano, Valerio Vitale, Gianfranco Vallone, Patrizia Oresta
Necrotizing enterocolitis (NEC) is an inflammatory process, characterized by intestinal necrosis of variable extension, leading to perforation, generalized peritonitis and death. The classical pathogenetic theory focuses on mucosal damage related to a stress induced intestinal ischemia leading to mucosal injury and bacterial colonization of the wall. A more recent hypothesis emphasizes the role of immaturity of gastrointestinal and immune system, particularly of the premature, responsible of bowel wall vulnerability and suffering...
June 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28795734/single-gold-bipyramids-with-sharp-tips-as-sensitive-single-particle-orientation-sensors-in-biological-studies
#4
So Young Lee, Yeji Han, Jong Wook Hong, Ji Won Ha
Plasmonic gold bipyramids (AuBPs) with sharp tips are promising orientation probes in biological studies because of their anisotropic shape, strong electric field enhancement at the tips, and convenient manipulation into other shapes. Herein, we elucidate the optical properties of single AuBPs at their localized surface plasmon resonance (LSPR) wavelengths using dark-field (DF) microscopy and differential interference contrast (DIC) microscopy and test their use as orientation probes in a dynamic biological environment...
August 10, 2017: Nanoscale
https://www.readbyqxmd.com/read/28790423/decoupling-between-the-response-of-coral-calcifying-fluid-ph-and-calcification-to-ocean-acidification
#5
S Comeau, C E Cornwall, M T McCulloch
Evaluating the factors responsible for differing species-specific sensitivities to declining seawater pH is central to understanding the mechanisms via which ocean acidification (OA) affects coral calcification. We report here the results of an experiment comparing the responses of the coral Acropora yongei and Pocillopora damicornis to differing pH levels (8.09, 7.81, and 7.63) over an 8-week period. Calcification of A. youngei was reduced by 35% at pH 7.63, while calcification of P. damicornis was unaffected...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28781792/prostate-cancer-with-disseminated-carcinomatosis-of-the-bone-marrow-two-case-reports
#6
Tasuku Hiroshige, Yoshiro Eguchi
Disseminated carcinomatosis of the bone marrow (DCBM) is caused by cancer metastasis to the bone marrow and is often accompanied by disseminated intravascular coagulation (DIC), with rapid clinical progression. We herein report two cases receiving treatment with combined androgen blockade (CAB) and denosumab for prostate cancer with DCBM. The patient in case 1 was an 80-year-old man who was admitted with a 3-day history of melena and was diagnosed with prostate cancer with DCBM by bone marrow biopsy. Despite receiving therapy with CAB and denosumab, the patient developed castration-resistant prostate cancer (CRPC) with accompanying relapse of DIC and succumbed to the disease 7 months later...
August 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28781777/a-pharmacokinetic-study-of-diclofenac-sodium-in-rats
#7
Jing Yuan, He Ma, Nannan Cen, Ai Zhou, Hengxun Tao
The aim of the present study was to examine the pharmacokinetics of a single intravenous injection (i.v.) and oral administration (p.o.) of diclofenac sodium (DIC) in Sprague-Dawley (SD) rats. Twelve male SD rats were divided into 2 groups (n=6 per group); one group was injected intravenously with 2 mg/kg DIC, whereas the other group was lavaged with 2 mg/kg DIC. Blood samples were collected prior to DIC delivery (0 h) and 0.033, 0.083, 0.167, 0.25, 0.5, 1, 2, 4, 6, and 8 h post-administration. Blood plasma samples were analyzed using liquid chromatography-mass spectrometry (LC-MS/MS) following pretreatment to induce protein precipitation...
August 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28777934/mutations-in-trappc12-manifest-in-progressive-childhood-encephalopathy-and-golgi-dysfunction
#8
Miroslav P Milev, Megan E Grout, Djenann Saint-Dic, Yong-Han Hank Cheng, Ian A Glass, Christopher J Hale, David S Hanna, Michael O Dorschner, Keshika Prematilake, Avraham Shaag, Orly Elpeleg, Michael Sacher, Dan Doherty, Simon Edvardson
Progressive childhood encephalopathy is an etiologically heterogeneous condition characterized by progressive central nervous system dysfunction in association with a broad range of morbidity and mortality. The causes of encephalopathy can be either non-genetic or genetic. Identifying the genetic causes and dissecting the underlying mechanisms are critical to understanding brain development and improving treatments. Here, we report that variants in TRAPPC12 result in progressive childhood encephalopathy. Three individuals from two unrelated families have either a homozygous deleterious variant (c...
August 3, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/28773137/full-field-indentation-damage-measurement-using-digital-image-correlation
#9
Elías López-Alba, Francisco A Díaz-Garrido
A novel approach based on full-field indentation measurements to characterize and quantify the effect of contact in thin plates is presented. The proposed method has been employed to evaluate the indentation damage generated in the presence of bending deformation, resulting from the contact between a thin plate and a rigid sphere. For this purpose, the 3D Digital Image Correlation (3D-DIC) technique has been adopted to quantify the out of plane displacements at the back face of the plate. Tests were conducted using aluminum thin plates and a rigid bearing sphere to evaluate the influence of the thickness and the material behavior during contact...
July 10, 2017: Materials
https://www.readbyqxmd.com/read/28773132/mechanical-behavior-of-stainless-steel-fiber-reinforced-composites-exposed-to-accelerated-corrosion
#10
Caitlin O'Brien, Amanda McBride, Arash E Zaghi, Kelly A Burke, Alex Hill
Recent advancements in metal fibers have introduced a promising new type of stainless steel fiber with high stiffness, high failure strain, and a thickness < 100 μm (<0.00394 in.) that can be utilized in a steel fiber-reinforced polymer. However, stainless steel is known to be susceptible to pitting corrosion. The main goal of this study is to compare the impact of corrosion on the mechanical properties of steel fiber-reinforced composites with those of conventional types of stainless steel. By providing experimental evidences, this study may promote the application of steel fiber-reinforced composite as a viable alternative to conventional metals...
July 8, 2017: Materials
https://www.readbyqxmd.com/read/28773038/material-flow-analysis-in-indentation-by-two-dimensional-digital-image-correlation-and-finite-elements-method
#11
Carolina Bermudo, Lorenzo Sevilla, Germán Castillo López
The present work shows the material flow analysis in indentation by the numerical two dimensional Finite Elements (FEM) method and the experimental two-dimensional Digital Image Correlation (DIC) method. To achieve deep indentation without cracking, a ductile material, 99% tin, is used. The results obtained from the DIC technique depend predominantly on the pattern conferred to the samples. Due to the absence of a natural pattern, black and white spray painting is used for greater contrast. The stress-strain curve of the material has been obtained and introduced in the Finite Element simulation code used, DEFORM™, allowing for accurate simulations...
June 21, 2017: Materials
https://www.readbyqxmd.com/read/28771554/increased-serum-thrombomodulin-level-is-associated-with-disease-severity-and-mortality-in-pediatric-sepsis
#12
Jainn-Jim Lin, Hsiang-Ju Hsiao, Oi-Wa Chan, Yu Wang, Shao-Hsuan Hsia, Cheng-Hsun Chiu
BACKGROUND: Endothelial dysfunction plays an important role in the pathophysiology of sepsis. As previously reported, the serum thrombomodulin is elevated in diseases associated with endothelial injury. OBJECTIVE: The aim of this study was to investigate the association of serum thrombomodulin level in different pediatric sepsis syndromes and evaluate the relationship with disease severity and mortality. METHODS: We prospectively collected cases of sepsis treated in a pediatric intensive care unit from June 2012 to July 2015 at Chang Gung Children's Hospital in Taoyuan, Taiwan...
2017: PloS One
https://www.readbyqxmd.com/read/28766813/acute-exacerbation-of-chronic-disseminated-intravascular-coagulation-associated-with-thoracoabdominal-aortic-aneurysm-after-tooth-extraction
#13
Shunsuke Hino, Akio Takeda, Takahiro Kaneko, Norio Horie, Tetsuo Shimoyama
OBJECTIVE: To present a rare case of persistent bleeding from the tooth extraction socket in a patient with chronic disseminated intravascular coagulation (DIC). BACKGROUND: Acute exacerbation of chronic DIC occurs by various trigger factors. CLINICAL REPORT: The patient's chronic DIC in association with thoracoabdominal aortic aneurysm was activated by tooth extraction, resulting in persistent bleeding from the socket. CONCLUSION: Patients with chronic DIC may have persistent bleeding following tooth extraction...
September 2017: Gerodontology
https://www.readbyqxmd.com/read/28761529/severity-of-anemia-and-hemostatic-parameters-are-strong-predictors-of-outcome-in-postoperative-neurosurgical-patients
#14
Mrinalini Kotru, Satya Shiv Munjal, Deepti Mutreja, Guresh Kumar, Manmohan Singh, Tullika Seth, Hara Prasad Pati
OBJECTIVE: Post-operative neurosurgical patients are commonly associated with haemostatic derangements; many a times leading to development of overt disseminated intravascular coagulation (DIC) and eventually death in some of them. The present study has analysed the factors that would predict the outcome in post operative neurosurgical patients with deranged haemostatic parameters. METHODS: This is a prospective, descriptive study over a period of 15 months on 115 post operative neurosurgical patients who were clinically suspected to have DIC and investigated for the haemostatic parameters...
July 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/28760954/glacial-weathering-sulfide-oxidation-and-global-carbon-cycle-feedbacks
#15
Mark A Torres, Nils Moosdorf, Jens Hartmann, Jess F Adkins, A Joshua West
Connections between glaciation, chemical weathering, and the global carbon cycle could steer the evolution of global climate over geologic time, but even the directionality of feedbacks in this system remain to be resolved. Here, we assemble a compilation of hydrochemical data from glacierized catchments, use this data to evaluate the dominant chemical reactions associated with glacial weathering, and explore the implications for long-term geochemical cycles. Weathering yields from catchments in our compilation are higher than the global average, which results, in part, from higher runoff in glaciated catchments...
August 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28760266/comparing-multilevel-and-multiscale-convolution-models-for-small-area-aggregated-health-data
#16
Mehreteab Aregay, Andrew B Lawson, Christel Faes, Russell S Kirby, Rachel Carroll, Kevin Watjou
In spatial epidemiology, data are often arrayed hierarchically. The classification of individuals into smaller units, which in turn are grouped into larger units, can induce contextual effects. On the other hand, a scaling effect can occur due to the aggregation of data from smaller units into larger units. In this paper, we propose a shared multilevel model to address the contextual effects. In addition, we consider a shared multiscale model to adjust for both scale and contextual effects simultaneously. We also study convolution and independent multiscale models, which are special cases of shared multilevel and shared multiscale models, respectively...
August 2017: Spatial and Spatio-temporal Epidemiology
https://www.readbyqxmd.com/read/28759575/barriers-to-sexual-and-reproductive-healthcare-services-as-experienced-by-female-sex-workers-and-service-providers-in-dhaka-city-bangladesh
#17
Tasnuva Wahed, Anadil Alam, Salima Sultana, Monjur Rahman, Nazmul Alam, Monika Martens, Ratana Somrongthong
OBJECTIVES: This study aimed to identify the barriers female sex workers (FSWs) in Bangladesh face with regard to accessing sexual and reproductive health (SRH) care, and assess the satisfaction with the healthcare received. METHODS: Data were collected from coverage areas of four community-based drop-in-centers (DICs) in Dhaka where sexually transmitted infection (STI) and human immunovirus (HIV) prevention interventions have been implemented for FSWs. A total of 731 FSWs aged 15-49 years were surveyed...
2017: PloS One
https://www.readbyqxmd.com/read/28757779/symmetrical-peripheral-gangrene-in-sepsis-after-treatment-with-inotropes
#18
Jiin-Ling Jiang, Lin-Wei Tseng, Huai-Ren Chang
Symmetrical peripheral gangrene (SPG) is characterized by sudden onset of peripheral, frequently symmetrical, gangrene in the absence of major vascular occlusive disease. We report a case of four limb SPG caused by septic shock with disseminated intravascular coagulation (DIC) that had been treated with inotropes. This case shows that SPG may be present as a complication of sepsis due to systematic derangement that affects a wide range of organ systems, including coagulation and microcirculation. Early recognition and prompt management of sepsis and optimization of the process of weaning off the inotropes at the earliest opportunity are necessary to avoid SPG...
April 2017: Ci Ji Yi Xue za Zhi, Tzu-chi Medical Journal
https://www.readbyqxmd.com/read/28756923/atractylenolide-%C3%A2-protects-against-lipopolysaccharide-induced-disseminated-intravascular-coagulation-by-anti-inflammatory-and-anticoagulation-effect
#19
Xiao-Mei Tang, Zhi-Kai Liao, You-Wei Huang, Xi Lin, Liang-Cai Wu
OBJECTIVE: To investigate whether atractylenolide Ⅰ (ATL-Ⅰ) has protective effect on lipopolysaccharide (LPS)-induced disseminated intravascular coagulation (DIC) in vivo and in vitro, and explore whether NF-κB signaling pathway is involved in ATL-Ⅰ treatment. METHODS: New Zealand white rabbits were injected with LPS through marginal ear vein over a period of 6 h at a rate of 600 μg/kg (10 mL/h). Similarly, in the treatment groups, 1.0, 2.0, or 5.0 mg/kg ATL-Ⅰ were given...
June 2017: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/28747069/a-proposal-of-the-modification-of-japanese-society-on-thrombosis-and-hemostasis-jsth-disseminated-intravascular-coagulation-dic-diagnostic-criteria-for-sepsis-associated-dic
#20
Toshiaki Iba, Marcello Di Nisio, Jecko Thachil, Hideo Wada, Hidesaku Asakura, Koichi Sato, Daizoh Saitoh
Sepsis-associated disseminated intravascular coagulation (DIC) carries a high risk of death. Thus, a simple tool to quickly establish DIC diagnosis is required. The purpose of this study was to introduce the simple and reliable tool for the prediction of outcome in patients with sepsis complicated by coagulopathy. We investigated the performance of simplified Japanese Society on Thrombosis and Hemostasis (JSTH) DIC diagnostic criteria. In this study, we conducted a retrospective, multicenter survey in 107 general emergency and critical care centers in secondary and tertiary care hospitals...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
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