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https://www.readbyqxmd.com/read/28726383/marangoni-convection-assisted-single-molecule-detection-with-nanojet-surface-enhanced-raman-spectroscopy
#1
Te-Wei Chang, Xinhao Wang, Amirreza Mahigir, Georgios Veronis, Gang Logan Liu, Manas Ranjan Gartia
Many single-molecule (SM) label-free techniques such as scanning probe microscopies (SPM) and magnetic force spectroscopies (MFS) provide high resolution surface topography information, but lack chemical information. Typical surface enhanced Raman spectroscopy (SERS) systems provide chemical information on the analytes, but lack spatial resolution. In addition, a challenge in SERS sensors is to bring analytes into the so-called "hot spots" (locations where the enhancement of electromagnetic field amplitude is larger than 10(3))...
July 20, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28723938/gender-differences-in-cerebral-metabolism-for-color-processing-in-mice-a-pet-mri-study
#2
Philip C Njemanze, Mathias Kranz, Mario Amend, Jens Hauser, Hans Wehrl, Peter Brust
INTRODUCTION: Color processing is a central component of mammalian vision. Gender-related differences of color processing revealed by non-invasive functional transcranial Doppler ultrasound suggested right hemisphere pattern for blue/yellow chromatic opponency by men, and a left hemisphere pattern by women. MATERIALS AND METHODS: The present study measured the accumulation of [18F]fluorodeoxyglucose ([18F]FDG) in mouse brain using small animal positron emission tomography and magnetic resonance imaging (PET/MRI) with statistical parametric mapping (SPM) during light stimulation with blue and yellow filters compared to darkness condition...
2017: PloS One
https://www.readbyqxmd.com/read/28712773/spatial-distribution-and-seasonal-variation-of-phthalate-esters-in-the-jiulong-river-estuary-southeast-china
#3
Rongli Li, Jing Liang, Hualing Duan, Zhenbin Gong
The spatial distribution and seasonal variation of 16 phthalate esters (PAEs) in water, suspended particulate matter (SPM) and sediment were investigated in the Jiulong River estuary, Fujian, Southeast China. Of the 16 PAE congeners analyzed, only six PAEs, including dimethyl phthalate (DMP), diethyl phthalate (DEP), diisobutyl phthalate (DIBP), di-n-butyl phthalate (DBP), di(2-ethylhexyl) phthalate (DEHP) and diisononyl phthalate (DINP), were identified and quantified. The total concentrations of the six PAEs (∑6PAEs) detected for all seasons ranged from 3...
July 13, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28708045/spontaneous-pneumomediastinum-case-presentation-to-a-college-student-health-clinic
#4
P Hunter Spotts
The author describes a case of spontaneous pneumomediastinum (SPM) in a nineteen year old male presenting to a college student health clinic. The author also provides a review of SPM, including clinical manifestations, diagnostic evaluation, and management.
July 14, 2017: Journal of American College Health: J of ACH
https://www.readbyqxmd.com/read/28704562/cerebral-18f-fdg-pet-in-macrophagic-myofasciitis-an-individual-svm-based-approach
#5
Paul Blanc-Durand, Axel Van Der Gucht, Eric Guedj, Mukedaisi Abulizi, Mehdi Aoun-Sebaiti, Lionel Lerman, Antoine Verger, François-Jérôme Authier, Emmanuel Itti
INTRODUCTION: Macrophagic myofasciitis (MMF) is an emerging condition with highly specific myopathological alterations. A peculiar spatial pattern of a cerebral glucose hypometabolism involving occipito-temporal cortex and cerebellum have been reported in patients with MMF; however, the full pattern is not systematically present in routine interpretation of scans, and with varying degrees of severity depending on the cognitive profile of patients. Aim was to generate and evaluate a support vector machine (SVM) procedure to classify patients between healthy or MMF 18F-FDG brain profiles...
2017: PloS One
https://www.readbyqxmd.com/read/28700593/implementation-of-a-loss-of-function-system-to-determine-growth-and-stress-associated-mutagenesis-in-bacillus-subtilis
#6
Norberto Villegas-Negrete, Eduardo A Robleto, Armando Obregón-Herrera, Ronald E Yasbin, Mario Pedraza-Reyes
A forward mutagenesis system based on the acquisition of mutations that inactivate the thymidylate synthase gene (TMS) and confer a trimethoprim resistant (Tmpr) phenotype was developed and utilized to study transcription-mediated mutagenesis (TMM). In addition to thyA, Bacillus subtilis possesses thyB, whose expression occurs under conditions of cell stress; therefore, we generated a thyB- thyA+ mutant strain. Tmpr colonies of this strain were produced with a spontaneous mutation frequency of ~1.4 × 10-9...
2017: PloS One
https://www.readbyqxmd.com/read/28699025/polyamines-increase-nitric-oxide-and-reactive-oxygen-species-in-guard-cells-of-arabidopsis-thaliana-during-stomatal-closure
#7
Srinivas Agurla, Gunja Gayatri, Agepati S Raghavendra
A comprehensive study which was undertaken on the effect of three polyamines (PAs) on stomatal closure was examined in relation to nitric oxide (NO) and reactive oxygen species (ROS) levels in guard cells of Arabidopsis thaliana. Three PAs-putrescine (Put), spermidine (Spd), and spermine (Spm)-induced stomatal closure, while increasing the levels of NO as well as ROS in guard cells. The roles of NO and ROS were confirmed by the reversal of closure by cPTIO (NO scavenger) and catalase (ROS scavenger). The presence of L-NAME (NOS-like enzyme inhibitor) reversed PA-induced stomatal closure, suggesting that NOS-like enzyme played a significant role in NO production during stomatal closure...
July 11, 2017: Protoplasma
https://www.readbyqxmd.com/read/28696256/a-novel-subset-of-anti-inflammatory-cd138-macrophages-is-deficient-in-mice-with-experimental-lupus
#8
Shuhong Han, Haoyang Zhuang, Stepan Shumyak, Jingfan Wu, Hui Li, Li-Jun Yang, Westley H Reeves
Dead cells accumulating in the tissues may contribute to chronic inflammation. We examined the cause of impaired apoptotic cell clearance in human and murine lupus. Dead cells accumulated in bone marrow from lupus patients but not from nonautoimmune patients undergoing myeloablation, where they were efficiently removed by macrophages (MΦ). Impaired apoptotic cell uptake by MΦ also was seen in mice treated i.p. with pristane (develop lupus) but not mineral oil (MO) (do not develop lupus). The inflammatory response to both pristane and MO rapidly depleted resident (Tim4(+)) large peritoneal MΦ...
July 10, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28694504/melatonin-alleviates-chilling-stress-in-cucumber-seedlings-by-up-regulation-of-cszat12-and-modulation-of-polyamine-and-abscisic-acid-metabolism
#9
Hailiang Zhao, Kai Zhang, Xiaoting Zhou, Linjie Xi, Yuping Wang, Hongjun Xu, Tonghua Pan, Zhirong Zou
To obtain new insights into the mechanisms of the positive effects of exogenous melatonin applications to cucumber seedlings during chilling, we investigated its role in regulating photosynthesis, the transcription level of csZat12 and the metabolism of polyamines (PAs) and of abscisic acid (ABA). The negative effects of chilling were clearly alleviated in cucumber seedlings by irrigation with 200 μM melatonin solution. This was evidenced by alleviation of the decline in net photosynthesis rate and also in electrolyte leakage in chilled plants...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28694292/specialized-pro-resolving-mediators-spm-rescue-infant-mice-from-lethal-citrobacter-rodentium-infection-and-promote-immunity-against-re-infection
#10
Luis Alonso Diaz, Norman H Altman, Wasif Khan, Charles N Serhan, Becky Adkins
Infants are generally highly susceptible to oral pathogens. Intestinal infection and the associated diarrhea are significant global causes of morbidity and mortality in infants. Among the enteric pathogens, enteropathogenic E. coli (EPEC) stands out as showing the highest risk for infection-induced death in infants ≤ 12 months old. We have developed an experimental model of infant infection with EPEC, using the murine specific pathogen Citrobacter rodentium Our murine infant model is similar to EPEC infection in human infants since infant mice are much more susceptible to C...
July 10, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28693752/glyphosate-and-ampa-pseudo-persistent-pollutants-under-real-world-agricultural-management-practices-in-the-mesopotamic-pampas-agroecosystem-argentina
#11
Jezabel E Primost, Damián J G Marino, Virginia C Aparicio, José Luis Costa, Pedro Carriquiriborde
In the Pampas, public concern has strongly risen because of the intensive use of glyphosate for weed control and fallow associated with biotech crops. The present study was aimed to evaluate the occurrence and concentration of the herbicide and its main metabolite (AMPA) in soil and other environmental compartments of the mentioned agroecosystem, including groundwater, in relation to real-world agricultural management practices in the region. Occurrence was almost ubiquitous in solid matrices (83-100%) with maximum concentrations among the higher reported in the world (soil: 8105 and 38939; sediment: 3294 and 7219; suspended particulate matter (SPM): 584 and 475 μg/kg of glyphosate and AMPA)...
July 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28692287/quantifying-the-structure-and-composition-of-flocculated-suspended-particulate-matter-using-focused-ion-beam-nanotomography
#12
Jonathan A T Wheatland, Andrew J Bushby, Kate L Spencer
Suspended particulate matter (SPM) is present in the natural aquatic environment as loosely bound aggregates or 'flocs' and is responsible for the transport and fate of sediment, carbon, nutrients, pollutants, pathogens and manufactured nanoparticles from catchment to coast. Accurate prediction of SPM hydrodynamics requires the quantification of 3D floc properties (size, shape, density and porosity) that span several spatial scales. Yet, current techniques (video camera systems, optical microscopy and transmission electron microscopy, TEM) can only provide 2D simplifications of size and shape with a spatial resolution gap between the 'gross' (>100s µm) and nano-scale (<1 µm)...
July 10, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28687917/the-application-of-surgical-procedure-manager-spm-first-experience-with-fess
#13
Katharina Feige, Iris Gollnick, Pia Schmitz, Gero Strauss
In our hypothesis, the newly developed program SPM (surgical procedure manager) will ensure successful standardization and efficiency of the FESS (functional endoscopic sinus surgery) and therefore make a decisive contribution in terms of economization and improvement of intraoperative quality. Between 27th March 2015 and 8th October 2015, data from 259 FESS procedures were collected using the SPM. The study took place at the surgical desk, an operating room in the ACQUA clinic in Leipzig, Germany. 233 FESS (90%) of the total FESS (n = 259, 100%) were conducted entirely with SPM...
July 7, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28686993/potentially-toxic-elements-in-water-and-sediments-of-the-sava-river-under-extreme-flow-events
#14
Radmila Milačič, Tea Zuliani, Janja Vidmar, Primož Oprčkal, Janez Ščančar
River ecosystems are exposed to various stressors. Among them, elements may contribute to overall pollution of riverine environments, in particular during the extreme flow events. To evaluate the influence of variable river flow conditions on the mobilization of potentially toxic elements (PTE) (Cr, Ni, Cd, Zn, Pb, As and Cu) from sediments into the overlaying waters of the Sava River, samples were collected in September 2014, during extremely high water discharges and in September 2015, under low water discharge conditions...
July 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28681321/assessment-of-air-quality-in-haora-river-basin-using-fuzzy-multiple-attribute-decision-making-techniques
#15
Ajit Pratap Singh, Sumanta Chakrabarti, Sumit Kumar, Anjaney Singh
This paper deals with assessment of air quality in Haora River basin using two techniques. Initially, air quality indices were evaluated using a modified EPA method. The indices were also evaluated using a fuzzy comprehensive assessment (FCA) method. The results obtained from the fuzzy comprehensive assessment method were compared to that obtained from the modified EPA method. To illustrate the applicability of the methodology proposed herein, a case study has been presented. Air samples have been collected at 10 sampling sites located along Haora River...
August 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28680772/first-clinical-report-on-comparative-treatment-and-survival-outcomes-in-second-cancers-after-primary-head-and-neck-cancer-a-population-based-study
#16
Xin Wang, Elizabeth A Mauer, Paul Christos, Julia Manzerova, A Gabriella Wernicke, Bhupesh Parashar
INTRODUCTION: To compare patients' survival of second primary malignancy (SPM) after head and neck squamous cell carcinoma (HNSCC). METHODS: The Surveillance, Epidemiology, and End Results (SEER) database was utilized (1973-2011). The Kaplan-Meier method with log-rank test was used to compare the overall survival (OS) and cause-specific survival (CSS) among treatment methods from the time of diagnosis of SPMs. Cox proportional regression models were used to adjust the impact for risk factors on CSS...
May 29, 2017: Curēus
https://www.readbyqxmd.com/read/28680651/gray-matter-density-loss-in-essential-tremor-a-lobule-by-lobule-analysis-of-the-cerebellum
#17
Jonathan P Dyke, Eric Cameron, Nora Hernandez, Ulrike Dydak, Elan D Louis
BACKGROUND: The pathophysiological basis for essential tremor (ET) remains unclear, although evidence increasingly links it to a disordered and perhaps degenerative cerebellum. Prior imaging studies have treated the cerebellum en bloc. Our hypothesis was that regional differences in cerebellar gray matter (GM) density may better distinguish ET cases from controls. Forty-seven ET cases and 36 control subjects were imaged using magnetic resonance imaging (MRI). The cerebellum was segmented into 34 lobes using a Spatially Unbiased Infra-Tentorial Template (SUIT) atlas within the Statistical Parametric Mapping (SPM) analysis package...
2017: Cerebellum & Ataxias
https://www.readbyqxmd.com/read/28677034/effect-of-dietary-utilisation-of-sugarcane-press-mud-on-production-performance-of-muzaffarnagari-lambs
#18
Ranjan Kumar, S K Saha, Dinesh Kumar, M S Mahesh, C D Malapure
Sugarcane press mud (SPM) is one of the potential agro-industrial by-products available in India and research exploring its utilisation in small ruminant nutrition is scanty. In this direction, the present study evaluated the feasibility of dietary incorporation of SPM at different levels in a feeding trial lasting 180 days. A total of 21 Muzaffarnagari ram lambs were randomly distributed into three groups of seven each based on comparable body weight (11.70 ± 0.29 kg) and age (3-5 months) following a completely randomised design...
July 5, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28672183/an-instrumental-approach-to-combining-confocal-microspectroscopy-and-3d-scanning-probe-nanotomography
#19
Konstantin E Mochalov, Anton A Chistyakov, Daria O Solovyeva, Alexey V Mezin, Vladimir A Oleinikov, Ivan S Vaskan, Michael Molinari, Igor I Agapov, Igor Nabiev, Anton E Efimov
In the past decade correlative microscopy, which combines the potentials of different types of high-resolution microscopies with a variety of optical microspectroscopy techniques, has been attracting increasing attention in material science and biological research. One of outstanding solutions in this area is the combination of scanning probe microscopy (SPM), which provides data on not only the topography, but also the spatial distribution of a wide range of physical properties (elasticity, conductivity, etc...
June 21, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28671117/a-cross-validation-of-fdg-and-amyloid-pet-biomarkers-in-mild-cognitive-impairment-for-the-risk-prediction-to-dementia-due-to-alzheimer-s-disease-in-a-clinical-setting
#20
Leonardo Iaccarino, Konstantinos Chiotis, Pierpaolo Alongi, Ove Almkvist, Anders Wall, Chiara Cerami, Valentino Bettinardi, Luigi Gianolli, Agneta Nordberg, Daniela Perani
Assessments of brain glucose metabolism (18F-FDG-PET) and cerebral amyloid burden (11C-PiB-PET) in mild cognitive impairment (MCI) have shown highly variable performances when adopted to predict progression to dementia due to Alzheimer's disease (ADD). This study investigates, in a clinical setting, the separate and combined values of 18F-FDG-PET and 11C-PiB-PET in ADD conversion prediction with optimized data analysis procedures. Respectively, we investigate the accuracy of an optimized SPM analysis for 18F-FDG-PET and of standardized uptake value ratio semiquantification for 11C-PiB-PET in predicting ADD conversion in 30 MCI subjects (age 63...
June 24, 2017: Journal of Alzheimer's Disease: JAD
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