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https://www.readbyqxmd.com/read/28719887/anesthetic-management-of-cytoreductive-surgery-and-hyperthermic-intraperitoneal-chemotherapy-crs-hipec-the-importance-of-hydro-electrolytic-and-acid-basic-control
#1
Fabrício Tavares Mendonça, Marília Moreira Guimarães, Sérgio Honorato de Matos, Rúbia Garcia Dusi
JUSTIFICATION AND OBJECTIVES: Patients affected by gynecological or gastrointestinal tract neoplasms that evolve to peritoneal carcinomatosis experience a significant drop in their quality of life, high morbidity and short survival times with currently available chemotherapeutic schemes. The surgical treatment based on cytoreduction and the employment of hyperthermic intraperitoneal chemotherapy in the intra-operative period is a true challenge to anesthesiologist. CASE REPORT: A 67 years old patient diagnosed with mucinous adenocarcinoma of the Appendix associated with mucinous carcinomatosis, was submitted to cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC), under general anesthesia and epidural block...
July 10, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28719591/non-equilibrium-dissipative-supramolecular-materials-with-a-tunable-lifetime
#2
Marta Tena-Solsona, Benedikt Rieß, Raphael K Grötsch, Franziska C Löhrer, Caren Wanzke, Benjamin Käsdorf, Andreas R Bausch, Peter Müller-Buschbaum, Oliver Lieleg, Job Boekhoven
Many biological materials exist in non-equilibrium states driven by the irreversible consumption of high-energy molecules like ATP or GTP. These energy-dissipating structures are governed by kinetics and are thus endowed with unique properties including spatiotemporal control over their presence. Here we show man-made equivalents of materials driven by the consumption of high-energy molecules and explore their unique properties. A chemical reaction network converts dicarboxylates into metastable anhydrides driven by the irreversible consumption of carbodiimide fuels...
July 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28719219/microsecond-structural-rheology
#3
Felix Lehmkühler, Ingo Steinke, Martin A Schroer, Birgit Fischer, Michael Sprung, Gerhard Grübel
The relationship between the local structure of complex liquids and their response to shear is generally not well understood. This concerns in particular the formation of particle strings in flow direction or hydroclusters, both important for the understanding of shear thinning and thickening phenomena. Here, we present results of a microfocus X-ray scattering experiment on spherical silica colloids in a liquid jet at high shear rates. Along and across the jet we observe direction-dependent modifications of the structure factor of the suspension suggesting the formation of differently ordered clusters in stream and compression lines...
July 18, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28719063/enhanced-fibrinolysis-with-magnetically-powered-colloidal-microwheels
#4
Tonguc O Tasci, Dante Disharoon, Rogier M Schoeman, Kuldeepsinh Rana, Paco S Herson, David W M Marr, Keith B Neeves
Thrombi that occlude blood vessels can be resolved with fibrinolytic agents that degrade fibrin, the polymer that forms between and around platelets to provide mechanical stability. Fibrinolysis rates however are often constrained by transport-limited delivery to and penetration of fibrinolytics into the thrombus. Here, these limitations are overcome with colloidal microwheel (µwheel) assemblies functionalized with the fibrinolytic tissue-type plasminogen activator (tPA) that assemble, rotate, translate, and eventually disassemble via applied magnetic fields...
July 18, 2017: Small
https://www.readbyqxmd.com/read/28718036/paravertebral-blocks-reduce-narcotic-use-without-affecting-perfusion-in-patients-undergoing-autologous-breast-reconstruction
#5
Elizabeth B Odom, Nili Mehta, Rajiv P Parikh, Ryan Guffey, Terence M Myckatyn
BACKGROUND: Autologous breast reconstruction offers excellent long term outcomes after mastectomy. However, maintaining adequate postoperative analgesia remains challenging. Use of paravertebral blocks (PVBs) reduces postoperative narcotic use and length of stay, and enhanced recovery protocols with mixed analgesia methods are gaining popularity, but few studies have explored the intraoperative effects of these interventions. METHODS: Patients who underwent abdominally based autologous breast reconstruction between 2010 and 2016 were compiled into a retrospective database...
July 17, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28717798/correction-phase-behavior-of-colloid-polymer-depletion-mixtures-with-unary-or-binary-depletants
#6
Nayoung Park, Jacinta C Conrad
Correction for 'Phase behavior of colloid-polymer depletion mixtures with unary or binary depletants' by Nayoung Park et al., Soft Matter, 2017, 13, 2781-2792.
July 18, 2017: Soft Matter
https://www.readbyqxmd.com/read/28717581/detection-of-echinococcus-granulosus-antigen-by-a-quantum-dot-porous-silicon-optical-biosensor
#7
Yanyu Li, Zhenhong Jia, Guodong Lv, Hao Wen, Peng Li, Hongyan Zhang, Jiajia Wang
Highly sensitive labeled detection of Echinococcus granulosus using colloidal quantum dots (QDs) based on a porous silicon Bragg mirror sensor are demonstrated. Rabbit anti-p38 labeled CdSe/ZnS QDs was infiltrated in porous silicon pores immobilized Egp38 antigen. QD-antibodies are specifically bound to antigens linked covalently to the pore walls of PSi after the immune reaction. By the design of the transfer matrix method and the preparation of the electrochemical etching method, the fluorescence peak wavelength of the quantum dots is located in the forbidden band of the Bragg mirror...
July 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28715860/hemoglobin-bioconjugates-with-surface-protected-gold-nanoparticles-in-aqueous-media-the-stability-depends-on-solution-ph-and-protein-properties
#8
Rafael Del Caño, Lucia Mateus, Guadalupe Sánchez-Obrero, José Manuel Sevilla, Rafael Madueño, Manuel Blázquez, Teresa Pineda
The identification of the factors that dictate the formation and physicochemical properties of protein-nanomaterial bioconjugates are important to understand their behavior in biological systems. The present work deals with the formation and characterization of bioconjugates made of the protein hemoglobin (Hb) and gold nanoparticles (AuNP) capped with three different molecular layers (citrate anions (c), 6-mercaptopurine (MP) and ω-mercaptoundecanoic acid (MUA)). The main focus is on the behavior of the bioconjugates in aqueous buffered solutions in a wide pH range...
July 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28715772/stability-of-single-dispersed-silver-nanoparticles-in-natural-and-synthetic-freshwaters-effects-of-dissolved-oxygen
#9
Xiaoyan Zou, Penghui Li, Jie Lou, Xiaoyan Fu, Hongwu Zhang
Silver nanoparticles (AgNPs) are increasingly used in various commercial products. This increased use raises ecological concerns because of the large release of AgNPs into the environment. Once released, the local water chemistry has the potential to influence the environmental fates and behaviors of AgNPs. The impacts of dissolved oxygen and natural organic matter (NOM) on the dissolution and stability of AgNPs were investigated in synthetic and natural freshwaters for 7 days. In synthetic freshwater, the aggregation of AgNPs occurred due to the compression of the electric double layer, accompanied by the dissolution of AgNPs...
July 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28715765/impact-of-coated-tio2-nanoparticles-used-in-sunscreens-on-two-representative-strains-of-the-human-microbiota-effect-of-the-particle-surface-nature-and-aging
#10
Laura Rowenczyk, Cécile Duclairoir-Poc, Magalie Barreau, Céline Picard, Nicolas Hucher, Nicole Orange, Michel Grisel, Marc Feuilloley
The impact of two differently coated TiO2-nanoparticles (NPs) was evaluated on two representative bacteria from the cutaneous microbiota (Staphylococcus aureus and Pseudomonas fluorescens) in conditions of use. Particles were coated in order to exhibit either hydrophilic or hydrophobic behavior. A first exposure scenario within some fresh/aged model emulsions was developed in order to measure both the impact of the NPs presence and their surface nature during the emulsions conservation. Thanks to this protocol, it was demonstrated that, during aging, the hydrophobic NPs modified the physicochemical characteristics of the emulsions, such as the pH or the colloids sizes, and favored the development of potential pathogenic bacteria...
July 8, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28715195/thermo-mechanical-response-of-self-assembled-nanoparticle-membranes
#11
Yifan Wang, Henry Chan, Badri Narayanan, Sean P McBride, Subramanian K R S Sankaranarayanan, Xiao-Min Lin, Heinrich Martin Jaeger
Monolayers composed of colloidal nanoparticles, with a thickness of less than ten nanometers, have remarkable mechanical moduli and can suspend over micron-sized holes to form free-standing membranes. In this paper, we discuss experiments and coarse-grained molecular dynamics simulations characterizing the thermo-mechanical properties of these self-assembled nanoparticle membranes. These membranes remain strong and resilient up to temperatures much higher than previous simulation predictions, and exhibit an unexpected hysteretic behavior during the first heating-cooling cycle...
July 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/28714511/tailoring-crack-morphology-in-coffee-ring-deposits-via-substrate-heating
#12
Hisay Lama, Madivala G Basavaraj, Dillip K Satapathy
The drying of a sessile drop consisting of colloidal particles and the formation of particulate deposits with spatially periodic cracks were ubiquitous. The drying induced stress, which is generated during the evaporation of a colloidal drop, is released by the formation of cracks. We find that the morphology of cracks formed in particulate films dried at substrate temperature, Tsub = 25 °C is markedly different from that of cracks formed at Tsub > 45 °C. The cracks are disordered in the former case, but ordered and periodic in the latter...
July 17, 2017: Soft Matter
https://www.readbyqxmd.com/read/28714245/drug-loaded-multifunctional-nanoparticles-targeted-to-the-endocardial-layer-of-the-injured-heart-modulate-hypertrophic-signaling
#13
Mónica P A Ferreira, Sanjeev Ranjan, Sini Kinnunen, Alexandra Correia, Virpi Talman, Ermei Mäkilä, Brianda Barrios-Lopez, Marianna Kemell, Vimalkumar Balasubramanian, Jarno Salonen, Jouni Hirvonen, Heikki Ruskoaho, Anu J Airaksinen, Hélder A Santos
Ischemic heart disease is the leading cause of death globally. Severe myocardial ischemia results in a massive loss of myocytes and acute myocardial infarction, the endocardium being the most vulnerable region. At present, current therapeutic lines only ameliorate modestly the quality of life of these patients. Here, an engineered nanocarrier is reported for targeted drug delivery into the endocardial layer of the left ventricle for cardiac repair. Biodegradable porous silicon (PSi) nanoparticles are functionalized with atrial natriuretic peptide (ANP), which is known to be expressed predominantly in the endocardium of the failing heart...
July 17, 2017: Small
https://www.readbyqxmd.com/read/28714202/an-all-solution-based-hybrid-cmos-like-quantum-dot-carbon-nanotube-inverter
#14
Artem G Shulga, Vladimir Derenskyi, Jorge Mario Salazar-Rios, Dmitry N Dirin, Martin Fritsch, Maksym V Kovalenko, Ullrich Scherf, Maria A Loi
The development of low-cost, flexible electronic devices is subordinated to the advancement in solution-based and low-temperature-processable semiconducting materials, such as colloidal quantum dots (QDs) and single-walled carbon nanotubes (SWCNTs). Here, excellent compatibility of QDs and SWCNTs as a complementary pair of semiconducting materials for fabrication of high-performance complementary metal-oxide-semiconductor (CMOS)-like inverters is demonstrated. The n-type field effect transistors (FETs) based on I(-) capped PbS QDs (Vth = 0...
July 17, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28714171/controlled-gelation-of-graphene-towards-unprecedented-superstructures
#15
Ling Qiu, Soren Vermehren Petersen, Dan Li
Graphene exhibits a range of exceptional physical properties and holds great promise for development of novel bulk materials for widespread applications. Properly engineering of assembled structures of graphene at multiple length scales is essential to realize its full potential in bulk forms. In this Concept article, we highlight the unique colloidal and gelation behavior of a commonly used precursor for graphene, graphene oxide (GO), and discuss how the colloidal chemistry of GO and reduced GO can enable new scalable and cost-effective approaches to construct graphene-based soft superstructures with excellent properties...
July 16, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28711858/size-distribution-of-extracellular-vesicles-by-optical-correlation-techniques
#16
Costanza Montis, Andrea Zendrini, Francesco Valle, Sara Busatto, Lucia Paolini, Annalisa Radeghieri, Annalisa Salvatore, Debora Berti, Paolo Bergese
Understanding the colloidal properties of extracellular vesicles (EVs) is key to advance fundamental knowledge in this field and to develop effective EV-based diagnostics, therapeutics and devices. Determination of size distribution and of colloidal stability of purified EVs resuspended in buffered media is a complex and challenging issue - because of the wide range of EV diameters (from 30 to 2000nm), concentrations of interest and membrane properties, and the possible presence of co-isolated contaminants with similar size and densities, such as protein aggregates and fat globules - which is still waiting to be fully addressed...
July 1, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28711712/ex-vivo-and-in-vivo-evaluation-of-microemulsion-based-transdermal-delivery-of-e-coli-specific-t4-bacteriophage-a-rationale-approach-to-treat-bacterial-infection
#17
Vaibhav Rastogi, Pragya Yadav, Anurag Verma, Jayanta K Pandit
This study is focused on the development and evaluation of transdermal delivery of E. coli-specific T4 bacteriophages both ex-vivo and in-vivo using microemulsion as delivery carrier in eradicating the infection caused by E. coli. Microemulsions were prepared by mixing selected oil, surfactants and aqueous phase containing bacteriophages. The formulations were subjected to physicochemical characterization, ex-vivo and in-vivo permeation, stability studies, histological and immunofluorescence examination. The colloidal system exhibits a uniform size distribution, of finite size (150-320nm)...
July 12, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28711613/enzyme-activity-and-expression-pattern-of-intra-and-extracellular-chitinase-and-%C3%AE-1-3-glucanase-of-wickerhamomyces-anomalus-eg2-using-glycol-chitin-and-glucan-containing-high-polymer-complex
#18
Sin-Hyoung Hong, Yong-Su Song, Dong-Jun Seo, Kil-Yong Kim, Woo-Jin Jung
We investigated cell growth and activity of intra- and extracellular chitinase, β-1,3-glucanase, and chitin deacetylase with SDS-PAGE by incubating W. anomalus EG2 in PDB and YPD media for 24h in presence of different concentrations (0%, 0.1%, 0.3%, and 0.5%) of colloidal chitin. Maximum cell growth was observed in both PDB and YPD media without colloidal chitin. In the absence of colloidal chitin, maximum extracellular β-1,3-glucanase activity of 32.96 and 47.28 units/mL was reported at 18h in PDB medium and 6h in YPD medium, respectively...
July 12, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28710859/carbonitride-aerogels-for-the-photoredox-conversion-of-water
#19
Honghui Ou, Pengju Yang, Lihua Lin, Masakazu Anpo, Xinchen Wang
Aerogel structures have attracted increasing research interest in energy storage and conversion owing to their unique structural features, and a variety of matters has been engineered into aerogels, including carbons, metal oxides, linear polymers and even metal chalcogenides. However, manufacturing of aerogels from nitride-based materials, particularly the emerging light-weight carbonitride (CN) is rarely reported. Here, we develop a facile method based on self-assembly chemistry to produce self-supported CN aerogels, without using any cross-linking agents...
July 15, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28710015/bactericidal-impact-of-ag-zno-and-mixed-agzno-colloidal-nanoparticles-on-h37rv-mycobacterium-tuberculosis-phagocytized-by-thp-1%C3%A2-cell-lines
#20
Alireza Jafari, Nader Mosavari, Farahnaz Movahedzadeh, Saeedeh Jafari Nodooshan, Roya Safarkar, Rossella Moro, Morteza Kamalzadeh, Ali Majidpour, Mina Boustanshenas, Tahereh Mosavi
The purpose of this research project was to infection of human macrophages (THP-1) cell lines by H37Rv strain of Mycobacterium tuberculosis (H37RvMTB) and find out the ratio/dilution of mixture silver (Ag NPs) and zinc oxide nanoparticles (ZnO NPs) whose ability to eliminate phagocytized bacteria compared to rifampicin. The colloidal Ag NPs and ZnO NPs were synthesized and their characteristics were evaluated. The THP-1 cell lines were infected with different concentration of H37RvMTB. Next, the infected cells were treated with different ratios/dilutions of Ag NPs, ZnO NPs and rifampicin...
July 11, 2017: Microbial Pathogenesis
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