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https://www.readbyqxmd.com/read/29043809/adsorption-at-the-air-water-interface-in-biosurfactant-surfactant-mixtures-quantitative-analysis-of-adsorption-in-a-five-component-mixture
#1
Jessica R Liley, Robert K Thomas, Jeffrey Penfold, Ian M Tucker, Jordan T Petkov, Paul S Stevenson, Ibrahim M Banat, Roger Marchant, Michelle Rudden, John Robert Peter Webster
The composition of an adsorbed layer at the air--water interface of a quinary mixture consisting of three conventional surfactants, octa-ethylene glycol monododecyl ether (C12E8), dodecane-6-p-sodium benzene sulfonate (LAS6), and diethylene glycol monododecyl ether sodium sulfate (SLE2S) mixed with two biosurfactants, the rhamnolipids L-rhamnosyl-L-rhamnosyl-β-hydroxydecanoyl-β-hydroxydecanoyl, R2, and L-rhamnosyl-β-hydroxydecanoyl-β-hydroxydecanoyl, R1, has been measured over a range of compositions above the mixed critical micelle concentration (CMC)...
October 18, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29041020/-pilot-study-on-the-effects-and-benefits-of-autologous-fat-grafting-in-osteoarthritis-of-the-cmc-1-joint-compared-to-intraarticular-cortisone-injection-results-after-3-months
#2
Elisabeth Maria Haas, Elias Volkmer, Riccardo E Giunta
Background/Aim Preliminary data suggest that an intraarticular autologous fat transplant may be useful in osteoarthritis (OA) of the CMC-1 joint. This prospective, non-randomised pilot study investigates this new method with a view to clinical outcomes compared with intraarticular corticosteroid injection. Patients and Methods 17 women and 7 men with an average age of 63.3 (47-75) years with symptomatic OA were included in the study. In 12 patients, a radiologically guided injection of 1-1.5 ml of adipose tissue was carried out after transumbilical liposuction of 10 ml of abdominal fat...
October 2017: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/29040803/synthesis-and-characterization-of-fatty-acid-grafted-chitosan-polymer-and-their-nanomicelles-for-non-viral-gene-delivery-applications
#3
Divya Sharma, Jagdish Singh
The aim of this study was to synthesize and characterize fatty acid-grafted-chitosan (fatty acid-g-CS) polymer and their nanomicelles for using as carriers for gene delivery. CS was hydrophobically modified using saturated fatty acids of increasing fatty acyl chain length. Carbodiimide along with N-hydroxysuccinimide was used for coupling carboxyl group of fatty acids with amine groups of CS. Proton nuclear magnetic resonance and Fourier transform-infrared spectroscopy were used to quantify fatty acyl substitution onto CS backbone...
October 17, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29037033/carboxymethylcellulose-mediates-the-transport-of-carbon-nanotubes-magnetite-nanohybrid-aggregates-in-water-saturated-porous-media
#4
Dengjun Wang, Chang Min Park, Arvid Masud, Nirupam Aich, Chunming Su
Carbon-metal oxide nanohybrids (NHs) are increasingly recognized as the next-generation, promising group of nanomaterials for solving emerging environmental issues and challenges. This research, for the first time, systematically explored the transport and retention of carbon nanotubes-magnetite (CNT-Fe3O4) NH aggregates in water-saturated porous media under environmentally relevant conditions. A macromolecule modifier, carboxymethylcellulose (CMC) was employed to stabilize the NHs. Our results show that transport of the magnetic CNT-Fe3O4 NHs was lower than that of non-magnetic CNT due to larger hydrodynamic sizes of NHs (induced by magnetic attraction) and size-dependent retention in porous media...
October 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29034424/interaction-mechanisms-between-polycyclic-aromatic-hydrocarbons-pahs-and-organic-soil-washing-agents
#5
Sarah Greish, Åsmund Rinnan, Helle Marcussen, Peter E Holm, Jan H Christensen
Understanding interaction mechanisms between polycyclic aromatic hydrocarbons (PAHs) and soil-washing agents can help in choosing efficient agents which are able to desorb and solubilize PAHs. This study investigated interaction mechanisms between pyrene and four washing agents including: two dissolved organic matters (DOM) F-DOM and CRC-DOM, and two commercial bio-based surfactants BBE-1000 and Supersolv using fluorescence spectroscopy combined with multivariate curve resolution alternating regression (MCR-AR)...
October 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29032687/on-the-problem-of-determining-aggregation-numbers-from-surface-tension-measurements
#6
Anatoly I Rusanov
In view of the recent discovery of variable aggregation numbers in the vicinity of the critical micelle concentration (CMC), the mass-action-law theory of the surface tension isotherm of a micellar solution with variable aggregation numbers is formulated both for nonionic and ionic surfactants. It is shown that the shape of the surface tension isotherm should be concave in the logarithmic scale above the CMC. Considering a change in the isotherm slope at the CMC apparent break point, the problems of determining the aggregation number for nonionic micelles and the degree of counterion binding for ionic micelles are discussed...
October 15, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29032085/fabrication-and-characterization-of-tea-polyphenols-loaded-pullulan-cmc-electrospun-nanofiber-for-fruit-preservation
#7
Ping Shao, Ben Niu, Hangjun Chen, Peilong Sun
Edible packaging films using polymer for food preservation have been developed for a long time. In this study, the effects of different concentrations (0.5%, 1%, 1.5%, w/v) of tea polyphenols incorporated into pullulan-Carboxymethylcellulose sodium (Pul-CMC) solutions on electrospun nanofiber films were evaluated. The fiber size distribution was characterized by scanning electron microscopy. The morphological features of nanofibers were modulated through adjusting process parameters (e.g. concentration of polymer solution, applied voltage and feeding rate)...
October 11, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29030191/effect-of-ph-and-surfactant-on-the-protein-a-perspective-from-theory-and-experiments
#8
Rachana Srivastava, Md Sayem Alam
In the present study, we are aimed to explore the bovine serum albumin (BSA) and sodium dodecyl sulfate (SDS) interaction that can readily show the consequence of the change in concentration of protein with surfactants' various concentration and the different pH's, 4.0, 4.7, 7.0 of the medium through the many spectroscopic techniques. The BSA and SDS denaturation fully influenced by the pH. The results interpreted in terms of electrostatic and hydrophobic contributions to the stability of different phases formed in the system...
October 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29030095/postoperative-rehabilitation-following-thumb-base-surgery-a-systematic-review-of-the-literature
#9
REVIEW
Robbert M Wouters, Jonathan Tsehaie, Steven E R Hovius, Burcu Dilek, Ruud W Selles
OBJECTIVE: To provide an overview of rehabilitation for patients who underwent CMC-1 arthroplasty, with emphasis on early active mobilization. DATA SOURCES/STUDY SELECTION: PubMed/MEDLINE, Embase, CINAHL and Cochrane were searched for articles written in English that described postoperative regime (including immobilization period/method and/or description of exercises/physical therapy, follow-up ≥six weeks) on CMC-1 arthroplasty. DATA EXTRACTION: The PRISMA statement was used as guidance in this review and methodological quality was assessed using the Effective Public Health Practice Project quality assessment tool...
October 10, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29030077/corticomuscular-coherence-reflects-somatosensory-feedback-gains-during-motor-adaptation
#10
Shoko Kasuga, Natsumi Momose, Junichi Ushiyama, Junichi Ushiba
Beta-band corticomuscular coherence (CMC) observed between the sensorimotor cortex activity and contracting muscle is declaratively described as a neurophysiological reflection of sensorimotor binding. However, much remains unknown about the functional meaning of 'sensorimotor binding.' The efficacy of information binding in the sensorimotor system is assumed to be influenced by the gain of the feedback controller, which is regulated through a process that may in part be implemented in the primary sensorimotor cortex (SM1)...
October 10, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/29029863/changes-in-local-bone-density-in-early-thumb-carpometacarpal-joint-osteoarthritis
#11
Joseph J Schreiber, Thomas J McQuillan, Eni Halilaj, Joseph J Crisco, Arnold-Peter Weiss, Tarpit Patel, Deborah Kenney, Amy L Ladd
PURPOSE: Thumb carpometacarpal (CMC) osteoarthritis (OA) represents a major source of functional morbidity. The effects of early CMC OA on loading and use patterns potentially lead to changes in local bone density and microarchitecture. Hounsfield units (HU), a quantitative attenuation coefficient obtained from computed tomography (CT) scans, have been shown to be a reliable marker of bone density. We hypothesized that early CMC OA is associated with lower local bone density about the CMC joint as assessed by HU...
October 10, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/29029568/quaternized-chitosan-nanoparticles-loaded-with-the-combined-attenuated-live-vaccine-against-newcastle-disease-and-infectious-bronchitis-elicit-immune-response-in-chicken-after-intranasal-administration
#12
Kai Zhao, Shanshan Li, Wei Li, Lu Yu, Xutong Duan, Jinyu Han, Xiaohua Wang, Zheng Jin
Newcastle disease (ND) and infectious bronchitis (IB) are important diseases, which cause respiratory diseases in chickens, resulting in severely economic losses in the poultry industry. In this study, N-2-hydroxypropyl trimethyl ammonium chloride chitosan (N-2-HACC) and N,O-carboxymethyl chitosan (CMC) were synthesized as adjuvant and delivery carrier for vaccine antigens. N-2-HACC-CMC/NDV/IBV nanoparticles (NPs) (NDV/La Sota and IBV/H120 encapsulated in N-2-HACC-CMC NPs) and N-2-HACC-CMC/NDV-IBV NPs (the mixing of N-2-HACC-CMC/NDV NPs and N-2-HACC-CMC/IBV NPs in a ratio of 1:1) were prepared by the polyelectrolyte composite method, respectively...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/29025636/folic-acid-grafted-and-tertiary-amino-based-ph-responsive-pentablock-polymeric-micelles-for-targeting-anticancer-drug-delivery
#13
Quan Chen, Jiewei Zheng, Xiaozhe Yuan, Jufang Wang, Lijuan Zhang
Increasing target to tumor sites and reducing accumulation at normal tissue sites of anticancer drugs are essential to improve the cancer chemotherapy efficiency. In this study, we have developed a novel pentablock polymeric poly(ethylene glycol)-b-(poly(2-(diethylamino) ethyl methacrylate)-b-poly (hydroxyethyl methacrylate)-g-folic acid)2 [PEG-b-(PDEAEMA-b-PHEMA-g-FA)2] micelles as anticancer drug nanocarrier. The carriers could target tumor cells rapidly, and response to the tumor sites pH to control drug release...
January 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29024100/an-all-integrated-anode-via-interlinked-chemical-bonding-between-double-shelled-yolk-structured-silicon-and-binder-for-lithium-ion-batteries
#14
Yajie Liu, Zhixin Tai, Tengfei Zhou, Vitor Sencadas, Jian Zhang, Lei Zhang, Konstantin Konstantinov, Zaiping Guo, Hua Kun Liu
The concept of an all-integrated design with multifunctionalization is widely employed in optoelectronic devices, sensors, resonator systems, and microfluidic devices, resulting in benefits for many ongoing research projects. Here, maintaining structural/electrode stability against large volume change by means of an all-integrated design is realized for silicon anodes. An all-integrated silicon anode is achieved via multicomponent interlinking among carbon@void@silica@silicon (CVSS) nanospheres and cross-linked carboxymethyl cellulose and citric acid polymer binder (c-CMC-CA)...
October 12, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29023983/age-vascular-health-and-alzheimer-s-disease-biomarkers-in-an-elderly-sample
#15
Prashanthi Vemuri, Timothy G Lesnick, Scott A Przybelski, David S Knopman, Val J Lowe, Jonathan Graff-Radford, Rosebud O Roberts, Michelle M Mielke, Mary M Machulda, Ronald C Petersen, Clifford R Jack
OBJECTIVE: To investigate the associations between age, vascular health, and Alzheimer's disease (AD) imaging biomarkers in an elderly sample. METHODS: We identified 430 individuals along the cognitive continuum aged>60 years with amyloid-PET, Tau-PET, and MRI scans from the population-based Mayo Clinic Study of Aging. A subset of 329 individuals had FDG-PET. We ascertained presently existing cardiovascular and metabolic conditions (CMC) from healthcare records and used the summation of presence/absence of hypertension, hyperlipidemia, cardiac-arrhythmias, coronary artery disease, congestive heart failure, diabetes mellitus, and stroke as a surrogate for vascular health...
October 10, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28992729/vessel-wall-mri-revealing-inflammation-on-brain-aneurysm-associated-to-chronic-mucocutaneous-candidiasis
#16
Arthur José Maia Lopes, Jose Guilherme Caldas, Fausto Ferraz, Manoel Jacobsen Teixeira, Eberval Gadelha Figueiredo
Some authors have reported the association between CMC and brain aneurysms. In this paper it is reported a fusiform brain aneurysm associated to CMC and the vessel wall MRI findings.
October 10, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28992178/tadalafil-improves-l-ng-nitroarginine-methyl-ester-induced-preeclampsia-with-fetal-growth-restriction-like-symptoms-in-pregnant-mice
#17
Kento Yoshikawa, Takashi Umekawa, Shintaro Maki, Michiko Kubo, Masafumi Nii, Kayo Tanaka, Hiroaki Tanaka, Kazuhiro Osato, Yuki Kamimoto, Eiji Kondo, Kenji Ikemura, Masahiro Okuda, Kan Katayama, Takekazu Miyoshi, Hiroshi Hosoda, Ning Ma, Toshimichi Yoshida, Tomoaki Ikeda
BACKGROUND: We investigated the efficacy and mechanisms of tadalafil, a selective phosphodiesterase 5 inhibitor, in treating preeclampsia (PE) with fetal growth restriction (FGR) using L-NG-nitroarginine methyl ester (L-NAME)-induced PE with FGR in pregnant mice as our experimental model. METHODS: C57BL/6 mice were divided into 2 groups 11 days postcoitum (d.p.c.). A control group of dams (C dam) received 0.5% carboxymethylcellulose (CMC). A L-NAME-treated group received 1 mg/ml L-NAME dissolved in CMC...
August 3, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28991388/specific-optical-rotation-is-a-versatile-tool-for-the-identification-of-critical-micelle-concentration-and-micellar-growth-of-tartaric-acid-based-diastereomeric-amphiphiles
#18
Vijay Raghavan, Prasad L Polavarapu
Four novel tartaric acid-based diastereomeric chiral amphiphiles, two being enantiomers of the other two, have been synthesized and investigated using chiroptical spectroscopic methods, along with tensiometry and dynamic light scattering experiments. We found that an inflection point in specific optical rotation (SOR) values at ~0.32 mM corresponds to the critical micelle concentration (CMC). The increase in magnitude of SOR values beyond CMC corresponds to the growth of aggregates. For enantiomers, oppositely signed SOR values were observed, ruling out the possibility for the presence of aggregation size mediated artefacts...
October 9, 2017: Chirality
https://www.readbyqxmd.com/read/28988009/formation-physicochemical-and-interfacial-study-of-carbamate-surfactants
#19
Anna-Karin Hellström, Hans Oskarsson, Romain Bordes
Carbon dioxide is commonly used as pH regulator in switchable surfactant systems and in the formation of alkyl ammonium-alkyl carbamate ion-pair. Its use to form a meta-stable anionic surfactant has been less explored and can impart a cleavable character to the amphiphile. The reaction between CO2 and an alkylamine, N,N-di(propylamino)dodecylamine (Y12-amine), under alkaline pH conditions, produced a stable anionic carbamate-based surfactant (Y12-carbamate). By heating and exposure to N2, anionic Y12-carbamate could slowly be reverted into Y12-amine...
September 28, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28987993/corticomuscular-coherence-in-the-acute-and-subacute-phase-after-stroke
#20
Lisbeth Hoejkjaer Larsen, Ivan Chrilles Zibrandtsen, Troels Wienecke, Troels Wesenberg Kjaer, Mark Schram Christensen, Jens Bo Nielsen, Henning Langberg
OBJECTIVE: Stroke is one of the leading causes of physical disability due to damage of the motor cortex or the corticospinal tract. In the present study we set out to investigate the role of adaptations in the corticospinal pathway for motor recovery during the subacute phase after stroke. METHODS: We examined 19 patients with clinically diagnosed stroke and 18 controls. The patients had unilateral mild to moderate weakness of the hand. Each patient attended two sessions at approximately 3days (acute) and 38days post stroke (subacute)...
September 22, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
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