keyword
MENU ▼
Read by QxMD icon Read
search

Ice

keyword
https://www.readbyqxmd.com/read/28526569/total-joint-replacement-for-neglected-posterior-knee-dislocation-following-septic-arthritis-after-arthroscopy
#1
Yusuf Öztürkmen, Yunus Emre Akman, Ethem Ayhan Ünkar, Erhan Şükür
This report presents the first case of a knee dislocation following septic arthritis after arthroscopy. A 65-year-old woman had an arthroscopy with irrigation and debridement (I&D) of the joint and microfracture for the chondral lesions. She had complaints of postarthroscopic infection but non-steroidal anti-inflammatory medication and local ice compression was recommended. She revisited her physician twice and at the last visit she had a large purulent effusion in her knee. The gram stain of the joint fluid aspirate demonstrated gram-positive cocci and the cultures grew methicilline-sensitive Staphylococcus aureus...
May 16, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/28525874/less-studied-tce-are-their-environmental-concentrations-increasing-due-to-their-use-in-new-technologies
#2
M Filella, J C Rodríguez-Murillo
The possible environmental impact of the recent increase in use of a group of technology-critical elements (Nb, Ta, Ga, In, Ge and Te) is analysed by reviewing published concentration profiles in environmental archives (ice cores, ombrotrophic peat bogs, freshwater sediments and moss surveys) and evaluating temporal trends in surface waters. No increase has so far been recorded. The low potential direct emissions of these elements, resulting from their absolute low production levels, make it unlikely that the increasing use of these elements in modern technology has any noticeable effect on their environmental concentrations on a global scale...
May 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28525771/return-of-the-ice-age-caspases-safeguard-against-inflammatory-cell-death
#3
Marcin Poreba, Guy Salvesen
In a recent issue of Cell Chemical Biology, Taabazuing et al. (2017) reveal a bidirectional interplay between pathways leading to apoptosis and pyroptosis, two forms of regulated cell death with opposing inflammatory outcomes. The outcome is sealed by differential cleavage of the key pyroptosis execution substrate gasdermin D such that inflammatory caspases activate it but apoptotic caspases prevent its activation.
May 18, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28525631/primary-leiomyosarcoma-of-inferior-vena-cava-adjacent-to-hepatic-veins-complete-off-pump-resection-and-inferior-vena-cava-graft-reconstruction-with-application-of-external-skin-surface-cooling
#4
Michael Malyshev, Sergey Zotov, Anton Malyshev, Andrey Rostovykh
OBJECTIVES: Resection of a leiomyosarcoma of the inferior vena cava (IVC) requires venovenous bypass, especially if IVC clamping above the hepatic veins is planned. This report describes the application of external skin surface cooling for off-pump resection of a primary IVC leiomyosarcoma adjacent to the hepatic veins with graft IVC reconstruction in conditions of suprahepatic caval clamping and uninterrupted Pringle's manoeuvre. METHODS: A 62-year-old woman presented with IVC leiomyosarcoma adjacent to the hepatic veins...
May 19, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28525273/directional-fluid-gating-by-janus-membranes-with-heterogeneous-wetting-properties-for-selective-oil-water-separation
#5
Prashant Gupta, Balasubramanian Kandasubramanian
The rising oil seepage accidents evolved into a global issue necessitating immediate counter measure to abridge its catastrophic repercussions on sensitive marine ecosystem urging innovative techniques for effective oil/water separation. Here, we report surface tailored wettability modified superhydrophobic/superoleophilic Janus membrane by impregnating non-ionic surfactant stabilized nano-sized polytetrafluoroethylene (PTFE) dispersion polymerized via non-fluorinated processing aid onto cotton substrate using Meyer rod coating technique, exhibiting excellent separation efficiency up to 98% with various petroleum products and retaining its intrinsic properties for at least 30 recurrences...
May 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28524871/in-situ-light-responses-of-the-proteorhodopsin-bearing-antarctic-sea-ice-bacterium-psychroflexus-torques
#6
David J Burr, Andrew Martin, Elizabeth W Maas, Ken G Ryan
Proteorhodopsin (PR) is a wide-spread protein found in many marine prokaryotes. PR allows for the potential conversion of solar energy to ATP, possibly assisting in cellular growth and survival during periods of high environmental stress. PR utilises either blue or green light through a single amino acid substitution. We incubated the PR-bearing bacterium Psychroflexus torquis 50 cm deep within Antarctic sea ice for 13 days, exposing cultures to diurnal fluctuations in light and temperature. Enhanced growth occurred most prominently in cultures incubated under irradiance levels of ∼50 μmol photons m(-2) s(-1), suggesting PR provides a strong selective advantage...
May 19, 2017: ISME Journal
https://www.readbyqxmd.com/read/28523638/quantum-chemical-modeling-of-hydrogen-bonding-in-ionic-liquids
#7
REVIEW
Patricia A Hunt
Hydrogen bonding (H-bonding) is an important and very general phenomenon. H-bonding is part of the basis of life in DNA, key in controlling the properties of water and ice, and critical to modern applications such as crystal engineering, catalysis applications, pharmaceutical and agrochemical development. H-bonding also plays a significant role for many ionic liquids (IL), determining the secondary structuring and affecting key physical parameters. ILs exhibit a particularly diverse and wide range of traditional as well as non-standard forms of H-bonding, in particular the doubly ionic H-bond is important...
June 2017: Topics in Current Chemistry (Journal)
https://www.readbyqxmd.com/read/28522806/the-alpine-lgm-in-the-boreal-ice-sheets-game
#8
Giovanni Monegato, Giancarlo Scardia, Irka Hajdas, Francesca Rizzini, Andrea Piccin
New chronologic and stratigraphic constraints from the Garda morainic amphitheater define the extension of the last glaciation in the Adige-Sarca system and improve the Alpine LGM dataset. Together with the available chronology of the Rhine and Tagliamento systems, our results indicate a synchronous maximum culmination of Alpine glaciers during the LGM, which anticipated by about 3.5 ka the maximum extension of the Eurasian Ice Sheet (EIS). This is ascribed to the sensitivity of Alpine glaciers to the availability of moisture from southerly circulation, as recently documented by speleothem δ(18)O curve from Sieben Hengste (7 H)...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28521956/comparative-life-cycle-assessment-of-alternative-strategies-for-energy-recovery-from-used-cooking-oil
#9
Lidia Lombardi, Barbara Mendecka, Ennio Carnevale
The separate collection of Used Cooking Oil (UCO) is gaining popularity through several countries in Europe. An appropriate management of UCO waste stream leads to substantial benefits. In this study, we analyse two different possibilities of UCO energy reuse: the direct feed to a reciprocating internal combustion engine (ICE) for cogeneration purpose, and the processing to generate biodiesel. Concerning biodiesel production, we analyse four among conventional and innovative technologies, characterised by different type and amount of used chemicals, heat and electricity consumptions and yields...
May 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28520473/a-new-method-and-mass-spectrometric-instrument-for-extraterrestrial-microbial-life-detection-using-the-elemental-composition-analyses-of-martian-regolith-and-permafrost-ice
#10
G G Managadze, A A Safronova, K A Luchnikov, E A Vorobyova, N S Duxbury, P Wurz, N G Managadze, A E Chumikov, R Kh Khamizov
We propose a new technique for the detection of microorganisms by elemental composition analyses of a sample extracted from regolith, permafrost, and ice of extraterrestrial bodies. We also describe the design of the ABIMAS instrument, which consists of the onboard time-of-flight laser mass-reflectron (TOF LMR) and the sample preparation unit (SPU) for biomass extraction. This instrument was initially approved to fly on board the ExoMars 2020 lander mission. The instrument can be used to analyze the elemental composition of possible extraterrestrial microbial communities and compare it to that of terrestrial microorganisms...
May 2017: Astrobiology
https://www.readbyqxmd.com/read/28518189/structure-and-dynamics-of-water-confined-in-a-graphene-nanochannel-under-gigapascal-high-pressure-dependence-of-friction-on-pressure-and-confinement
#11
Lei Yang, Yanjie Guo, Dongfeng Diao
Recently, water flow confined in nanochannels has become an interesting topic due to its unique properties and potential applications in nanofluidic devices. The trapped water is predicted to experience high pressure in the gigapascal regime. Theoretical and experimental studies have reported various novel structures of the confined water under high pressure. However, the role of this high pressure on the dynamic properties of water has not been elucidated to date. In the present study, the structure evolution and interfacial friction behavior of water constrained in a graphene nanochannel were investigated via molecular dynamics simulations...
May 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28518108/identification-of-plant-ice-binding-proteins-through-assessment-of-ice-recrystallization-inhibition-and-isolation-using-ice-affinity-purification
#12
Melissa Bredow, Heather E Tomalty, Virginia K Walker
Ice-binding proteins (IBPs) belong to a family of stress-induced proteins that are synthesized by certain organisms exposed to subzero temperatures. In plants, freeze damage occurs when extracellular ice crystals grow, resulting in the rupture of plasma membranes and possible cell death. Adsorption of IBPs to ice crystals restricts further growth by a process known as ice-recrystallization inhibition (IRI), thereby reducing cellular damage. IBPs also demonstrate the ability to depress the freezing point of a solution below the equilibrium melting point, a property known as thermal hysteresis (TH) activity...
May 5, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28517954/on-the-rocks-microbiological-quality-and-microbial-diversity-of-packaged-ice-in-southern-california
#13
Kun Ho Lee, Liana S Ab Samad, Phillip M Lwin, Stefan F Riedel, Ashley Magin, Mina Bashir, Parag A Vaishampayan, Wei-Jen Lin
Ice is defined as a food and is frequently used in direct contact with food and beverages. Packaged ice is commercially produced and can be easily found in grocery and convenience stores. However, the quality and safety of packaged ice products is not consistent. The Packaged Ice Quality Control Standards manual (PIQCS) published by the International Packaged Ice Association provides the quality and processing standards for packaged ice produced by its members. Packaged ice produced on the premise of stores (on-site packaged ice) is not required to be in compliance with these standards...
May 18, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28516199/cloning-and-stress-induced-expression-analysis-of-calmodulin-in-the-antarctic-alga-chlamydomonas-sp-ice-l
#14
Ying-Ying He, Yi-Bin Wang, Zhou Zheng, Fang-Ming Liu, Mei-Ling An, Xiao-Dong He, Chang-Feng Qu, Lu-Lu Li, Jin-Lai Miao
Calmodulin (CaM) is a Ca(2+)-binding protein that plays a role in several Ca(2+) signaling pathways, which dynamically regulates the activities of hundreds of proteins. The ice alga Chlamydomonas sp. ICE-L, which has the ability to adapt to extreme polar conditions, is a crucial primary producer in Antarctic ecosystem. This study hypothesized that Cam helps the ICE-L to adapt to the fluctuating conditions in the polar environment. It first verified the overall length of Cam, through RT-PCR and RACE-PCR, based on partial Cam transcriptome library of ICE-L...
May 17, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28515455/comparative-genomic-analysis-reveals-the-environmental-impacts-on-two-arcticibacter-strains-including-sixteen-sphingobacteriaceae-species
#15
Liang Shen, Yongqin Liu, Baiqing Xu, Ninglian Wang, Huabiao Zhao, Xiaobo Liu, Fei Liu
How the genomic diversity of species is driven by geographical isolation and environmental factors are not well understood for cold environments. Here, the environmental stress responses of two phylogenetically close Arcticibacter strains, A. eurypsychrophilus MJ9-5 and A. svalbardensis MN12-7, isolated from a Tibetan Plateau glacier and Svalbard soil, were analyzed. The comparative genomic analysis was performed with sixteen other related Sphingobacteriaceae species. Analyses of the relationships between growth temperature and genome composition, cold and heat shock genes showed that genomic adaption characteristics were more obvious when the strains were grouped by their upper limit in growth temperature, rather than by their minimal or optimal growth temperatures for Sphingobacteriaceae species...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28515078/shifting-quaternary-migration-patterns-in-the-bahamian-archipelago-evidence-from-the-zamia-pumila-complex-at-the-northern-limits-of-the-caribbean-island-biodiversity-hotspot
#16
Dayana E Salas-Leiva, Alan W Meerow, Michael Calonje, Javier Francisco-Ortega, M Patrick Griffith, Kyoko Nakamura, Vanessa Sánchez, Lindy Knowles, David Knowles
PREMISE OF THE STUDY: The Bahamas archipelago is formed by young, tectonically stable carbonate banks that harbor direct geological evidence of global ice-volume changes. We sought to detect signatures of major changes on gene flow patterns and reconstruct the phylogeographic history of the monophyletic Zamia pumila complex across the Bahamas. METHODS: Nuclear molecular markers with both high and low mutation rates were used to capture two different time scale signatures and test several gene flow and demographic hypotheses...
May 17, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/28514452/isotopic-evidence-of-multiple-controls-on-atmospheric-oxidants-over-climate-transitions
#17
Lei Geng, Lee T Murray, Loretta J Mickley, Pu Lin, Qiang Fu, Andrew J Schauer, Becky Alexander
The abundance of tropospheric oxidants, such as ozone (O3) and hydroxyl (OH) and peroxy radicals (HO2 + RO2), determines the lifetimes of reduced trace gases such as methane and the production of particulate matter important for climate and human health. The response of tropospheric oxidants to climate change is poorly constrained owing to large uncertainties in the degree to which processes that influence oxidants may change with climate and owing to a lack of palaeo-records with which to constrain levels of atmospheric oxidants during past climate transitions...
May 17, 2017: Nature
https://www.readbyqxmd.com/read/28513884/oxidized-quasi-carbon-nitride-quantum-dots-inhibit-ice-growth
#18
Guoying Bai, Zhiping Song, Hongya Geng, Dong Gao, Kai Liu, Shuwang Wu, Wei Rao, Liangqia Guo, Jianjun Wang
Antifreeze proteins (AFPs), a type of high-efficiency but expensive and often unstable biological antifreeze, have stimulated substantial interest in the search for synthetic mimics. However, only a few reported AFP mimics display thermal hysteresis, and general criteria for the design of AFP mimics remain unknown. Herein, oxidized quasi-carbon nitride quantum dots (OQCNs) are synthesized through an up-scalable bottom-up approach. They exhibit thermal-hysteresis activity, an ice-crystal shaping effect, and activity on ice-recrystallization inhibition...
May 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28513603/enhanced-heterogeneous-ice-nucleation-by-special-surface-geometry
#19
Yuanfei Bi, Boxiao Cao, Tianshu Li
The freezing of water typically proceeds through impurity-mediated heterogeneous nucleation. Although non-planar geometry generically exists on the surfaces of ice nucleation centres, its role in nucleation remains poorly understood. Here we show that an atomically sharp, concave wedge can further promote ice nucleation with special wedge geometries. Our molecular analysis shows that significant enhancements of ice nucleation can emerge both when the geometry of a wedge matches the ice lattice and when such lattice match does not exist...
May 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28512225/high-arctic-holocene-temperature-record-from-the-agassiz-ice-cap-and-greenland-ice-sheet-evolution
#20
Benoit S Lecavalier, David A Fisher, Glenn A Milne, Bo M Vinther, Lev Tarasov, Philippe Huybrechts, Denis Lacelle, Brittany Main, James Zheng, Jocelyne Bourgeois, Arthur S Dyke
We present a revised and extended high Arctic air temperature reconstruction from a single proxy that spans the past ∼12,000 y (up to 2009 CE). Our reconstruction from the Agassiz ice cap (Ellesmere Island, Canada) indicates an earlier and warmer Holocene thermal maximum with early Holocene temperatures that are 4-5 °C warmer compared with a previous reconstruction, and regularly exceed contemporary values for a period of ∼3,000 y. Our results show that air temperatures in this region are now at their warmest in the past 6,800-7,800 y, and that the recent rate of temperature change is unprecedented over the entire Holocene...
May 16, 2017: Proceedings of the National Academy of Sciences of the United States of America
keyword
keyword
5910
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"