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Block Periodization

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https://www.readbyqxmd.com/read/28531648/cationic-surfactant-blocks-radical-inhibiting-sites-on-silica
#1
Tan Zhang, Frank D Blum
Surfactant-catalyzed room-temperature radical polymerization of methyl methacrylate (MMA) was conducted in the presence of fumed silica nanoparticles and water. Three types of surfactants, cationic (CTAB), nonionic (Triton X-100) or anionic (SDS), were used to catalyze the decomposition of the initiator, 2,2'-azobisisobutyronitrile (AIBN). The surfactant-catalyzed decomposition rate constant for AIBN at room temperature was found to be independent of the surfactant type. However, the rates of polymerization of the MMA emulsion gels at room temperature were found to depend on the types of surfactant with: cationic>nonionic>anionic...
May 12, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28530007/preventive-effect-of-cpp-acpf-paste-and-fluoride-toothpastes-against-erosion-and-erosion-plus-abrasion-%C3%A2-in-vitro-a-3d-profilometric-analysis
#2
Genaina Guimarães Soares, Pâmela Amorim Magalhães, Ana Beatriz Monteiro Fonseca, Monica Almeida Tostes, Eduardo Moreira da Silva, Thereza Christina Lopes Coutinho
PURPOSE: To evaluate the effect of CPP-ACPF paste and fluoride toothpastes on enamel subjected to erosion and erosion plus abrasion in vitro. MATERIALS AND METHODS: A total of 220 human enamel blocks were divided into eleven groups (n = 20): CPP-ACPF paste (MPP), potassium nitrate/sodium fluoride toothpaste (PE), sodium fluoride toothpaste (FD), fluoride-free toothpaste (SO) and control (erosion only with no paste or toothpastes; CO) according to the experimental design: erosion or erosion plus abrasion immediately after erosion (ERO+I-ABR) or 30 min after erosion (ERO+30min-ABR)...
May 19, 2017: Oral Health & Preventive Dentistry
https://www.readbyqxmd.com/read/28529416/a-comparative-study-of-collagen-dressing-versus-petrolatum-gauze-dressing-in-reducing-pain-at-the-donor-area
#3
B A Ramesh, B K Jayalakshmi, J Mohan
BACKGROUND: Skin graft is one of the commonly done procedures by plastic surgeons, dermato surgeons and general surgeons. Pain at the donor area is a common complaint by the patient. The skin graft donor site area is usually covered with petrolatum dressing dermatosurgeons. AIM: This study was done to compare collagen dressing with petroleum gauze dressing in control of post-operative pain on skin graft donor area. MATERIALS AND METHODS: The study was done on forty patients, twenty as study group who received collagen dressing and twenty as control group who received petroleum gauze dressing...
January 2017: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/28526068/heat-pretreatment-of-canine-samples-to-evaluate-efficacy-of-imidacloprid%C3%A2-%C3%A2-moxidectin-and-doxycycline-in-heartworm-treatment
#4
Alexandre José Rodrigues Bendas, Flavya Mendes-de-Almeida, Cristiano Von Simson, Norma Labarthe
BACKGROUND: Considering the recent information on the increase of Dirofilaria immitis antigen detection by rapid assays in canine blood samples after heat treatment, the proposal that immune complexes block D. immitis antigen detection and that macrocyclic lactone + doxycycline (alternative protocol) might lead to increased production of those immune complexes, resulting in the erroneous diagnosis of adult worm elimination, and that there is no recommended adulticide marketed in Brazil, a study was performed to evaluate the interference of moxidectin + doxycycline (moxi-doxy) on diagnostic procedures when heartworm positive dogs are treated with this alternative protocol...
May 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28525260/three-dimensional-visualization-and-characterization-of-polymeric-self-assemblies-by-transmission-electron-microtomography
#5
Hiroshi Jinnai, Takeshi Higuchi, Xiaodong Zhuge, Akihito Kumamoto, Kees Joost Batenburg, Yuichi Ikuhara
Self-assembling structures and their dynamical processes in polymeric systems have been investigated using three-dimensional transmission electron microscopy (3D-TEM). Block copolymers (BCPs) self-assemble into nanoscale periodic structures called microphase-separated structures, a deep understanding of which is important for creating nanomaterials with superior physical properties, such as high-performance membranes with well-defined pore size and high-density data storage media. Because microphase-separated structures have become increasingly complicated with advances in precision polymerization, characterizing these complex morphologies is becoming increasingly difficult...
May 19, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28523856/tunable-self-assembly-of-diblock-copolymers-into-colloidal-particles-with-triply-periodic-minimal-surfaces
#6
Zhixing Lin, Shaohua Liu, Wenting Mao, Hao Tian, Nan Wang, Ninghe Zhang, Feng Tian, Lu Han, Xinliang Feng, Yiyong Mai
We herein report the tunable self-assembly of simple block copolymers, namely polystyrene-block-poly(ethylene oxide) (PS-b-PEO) diblock copolymers, into porous cubosomes with inverse Im3‾m or Pn3‾m mesophases of controlled unit cell parameters as well as hexasomes with an inverse hexagonal (p6mm) structure, which have been rarely observed in polymer self-assembly. A new morphological phase diagram was constructed for the solution self-assembly of PS-b-PEO based on the volume fraction of the PS block against the initial copolymer concentration...
May 19, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28522416/implantation-assays-using-the-integument-of-early-stage-bombyx-larvae-insights-into-the-mechanisms-underlying-the-acquisition-of-competence-for-metamorphosis
#7
Tomohiro Inui, Takaaki Daimon
It is widely accepted that the anti-metamorphic action of insect juvenile hormones (JHs) is required to inhibit larval-pupal metamorphosis. However, recent studies using RNAi or knockout techniques reveal that larval status may be maintained independently of JHs during the early larval stages. To investigate why larvae of very early instars do not have competence to metamorphose and how they acquire this competence through larval development, we revisited the classic experiments of Piepho (ca. 1930s) and performed implantation assays using the integument of very young larvae of the silkworm, Bombyx mori...
May 15, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28521981/self-assembly-of-maltoheptaose-b-pmma-block-copolymer-systems-10nm-resolution-in-thin-film-and-bulk-states
#8
C M Noronha, I Otsuka, C Bouilhac, C Rochas, P L M Barreto, R Borsali
This paper describes the self-assembly of oligosaccharide-based hybrid block copolymers (BCPs) consisting of maltoheptaose (MH) and poly(methyl methacrylate) (PMMA) into 10nm scale lamellar and cylindrical phases depending on the volume fractions of MH (ϕMH) and the annealing process. Time resolved SAXS study of the BCP bulk samples during thermal annealing indicated that the BCPs phase separate into 10nm scale periodical structures. The solvent vapor annealing induced self-organizations of the BCP into different phases depending on ϕMH and the weight fraction of THF/H2O...
August 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28521658/foetal-responses-to-dexmedetomidine-in-parturients-undergoing-caesarean-section-a-systematic-review-and-meta-analysis
#9
Jian Zhang, Haibin Zhou, Kaihua Sheng, Tian Tian, Anshi Wu
Objective This current meta-analysis was conducted to evaluate effects of dexmedetomidine on neonatal maternal factors. Methods The electronic databases of PubMed, Embase, and Cochrane Central Register of Controlled Trials were searched. The primary outcomes were neonatal parameters, including umbilical blood gases and Apgar scores. The secondary outcomes were maternal parameters. Results We identified six randomized controlled trials (RCTs). No differences in neonatal umbilical blood gases, and Apgar scores at 1 min (WMD: -0...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28515289/learning-temporal-context-shapes-the-prestimulus-alpha-oscillations-and-improves-the-visual-discrimination-performance
#10
Tahereh Toosi, Ehsan K Tousi, Hossein Esteky
Time is an inseparable component of every physical event that we perceive, yet it is not clear how the brain processes time or how the neuronal representation of time affects our perception of events. Here, we asked subjects to perform a visual discrimination task, while we changed the temporal context in which the stimuli were presented. We collected electroencephalography (EEG) signals in two temporal contexts. Predictable blocks: stimuli were presented after a constant delay relative to a visual cue, and unpredictable blocks: stimuli were presented after variable delays relative to the visual cue...
May 17, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28514779/low-back-pain-in-pregnancy-investigations-management-and-role-of-neuraxial-analgesia-and-anaesthesia-a-systematic-review
#11
Herman Sehmbi, Rohan D'Souza, Anuj Bhatia
BACKGROUND: Low back pain (LBP) is commonly experienced during pregnancy and is often poorly managed. There is much ambiguity in diagnostic work-up, appropriate management and decision-making regarding the use of neuraxial analgesia and anaesthesia during labour and delivery in these patients. This systematic review summarises the evidence regarding investigations, management strategies and considerations around performing neuraxial blocks for pregnant women with LBP. METHODS: We searched 3 databases and reviewed literature concerning LBP in pregnancy with regards to diagnostic modalities, management strategies and use of neuraxial techniques for facilitating labour and delivery...
May 18, 2017: Gynecologic and Obstetric Investigation
https://www.readbyqxmd.com/read/28514377/-iliac-arteries-and-aortic-repair-in-patients-with-retroperitoneal-sarcoma
#12
I S Stilidi, M G Abgaryan, M P Nikulin, A E Kalinin
AIM: To evaluate the results of surgical treatment in patients with retroperitoneal sarcoma and invasion into great vessels. MATERIAL AND METHODS: For the period 2009-2016 fourteenth patients with retroperitoneal sarcoma underwent resection and repair of great vessels at the abdominal department of N.N. Blokhin Russian Cancer Research Center. In 12 cases circular resection of infrarenal aorta, aortic bifurcation and iliac arteries followed by their replacement was made...
2017: Khirurgiia
https://www.readbyqxmd.com/read/28513985/self-assembled-nanofiber-coatings-for-controlling-cell-responses
#13
Raquel C Barros, Edith Gelens, Erna Bulten, Annemarie Tuin, Menno R de Jong, Roel Kuijer, Theo G van Kooten
Nanofibers are thought to enhance cell adhesion, growth, and function. We demonstrate that the choice of building blocks in self-assembling nanofiber systems can be used to control cell behavior. The use of 2 D-coated, self-assembled nanofibers in controlling lens epithelial cells, fibroblasts, and mesenchymal stem cells was investigated, focusing on gene and protein expression related to the fibrotic response. To this end, three nanofibers with different characteristics (morphology, topography, and wettability) were compared with two standard materials frequently used in culturing cells, TCPS, and a collagen type I coating...
May 17, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28512772/subspecialty-approach-for-the-management-of-acute-cholecystitis-an-alternative-to-acute-surgical-unit-model-of-care
#14
Sonia Tran, Vincent Choi, Kirsten Hepburn, Nathan Hewitt, Joel Zhou, Daniel L Chan, Michael L Talbot
BACKGROUND: Acute cholecystitis is a common condition. Recent studies have shown an association between creation of an acute surgical unit (ASU) and improved outcomes. This study aimed to evaluate the outcomes of a subspecialty based approach to the management of acute cholecystitis as an alternative to the traditional 'generalist' general surgery approach or the ASU model. METHOD: A 6-year retrospective analysis of outcomes in patients admitted under a dedicated upper gastrointestinal service for acute cholecystitis undergoing emergency laparoscopic cholecystectomy...
May 16, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/28510997/impact-of-m-health-application-used-by-community-health-volunteers-on-improving-utilization-of-maternal-newborn-and-child-health-care-services-in-a-rural-area-of-uttar-pradesh-india
#15
Shankar Prinja, Ruby Nimesh, Aditi Gupta, Pankaj Bahuguna, Madhu Gupta, Jarnail Singh Thakur
OBJECTIVE: To raise the quality of counselling by community health volunteers resulting in improved uptake of maternal, neonatal and child health services (MNCH), an m-health application was introduced under a project named 'Reducing Maternal and Newborn Deaths (ReMiND)' in district Kaushambi in India. We report the impact of this project on coverage of key MNCH services. METHODS: A pre and post quasi-experimental design was undertaken to assess the impact of intervention...
May 16, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28507605/diclofenac-potassium-for-oral-solution-cambia-%C3%A2-in-the-acute-management-of-a-migraine-attack-clinical-evidence-and-practical-experience
#16
REVIEW
Shivang Joshi, Alan M Rapoport
Migraine headache affects about 12% of Western populations and is the third most common disease worldwide (sixth in terms of disability). In 1993, triptans were introduced in the United States as a new treatment for managing migraine attacks, but their use is limited by lack of response and safety concerns in some patients. Treatment options for patients with migraine who fail or cannot tolerate triptans include switching to another medication or adding an adjunctive medication. Desirable characteristics reported by patients for acute treatment of migraine attacks include complete pain relief, fast onset of action, and no pain recurrence...
April 2017: Therapeutic Advances in Neurological Disorders
https://www.readbyqxmd.com/read/28506538/epitope-specific-immunotherapy-targeting-cd4-positive-t-cells-in-coeliac-disease-two-randomised-double-blind-placebo-controlled-phase-1-studies
#17
Gautam Goel, Tim King, A James Daveson, Jane M Andrews, Janakan Krishnarajah, Richard Krause, Gregor J E Brown, Ronald Fogel, Charles F Barish, Roger Epstein, Timothy P Kinney, Philip B Miner, Jason A Tye-Din, Adam Girardin, Juha Taavela, Alina Popp, John Sidney, Markku Mäki, Kaela E Goldstein, Patrick H Griffin, Suyue Wang, John L Dzuris, Leslie J Williams, Alessandro Sette, Ramnik J Xavier, Ludvig M Sollid, Bana Jabri, Robert P Anderson
BACKGROUND: A gluten-free diet is the only means to manage coeliac disease, a permanent immune intolerance to gluten. We developed a therapeutic vaccine, Nexvax2, designed to treat coeliac disease. Nexvax2 is an adjuvant-free mix of three peptides that include immunodominant epitopes for gluten-specific CD4-positive T cells. The vaccine is intended to engage and render gluten-specific CD4-positive T cells unresponsive to further antigenic stimulation. We assessed the safety and pharmacodynamics of the vaccine in patients with coeliac disease on a gluten-free diet...
May 11, 2017: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28505987/improved-grasp-function-with-transcranial-direct-current-stimulation-in-chronic-spinal-cord-injury
#18
Mar Cortes, Ana Heloisa Medeiros, Aasta Gandhi, Peter Lee, Hermano Igo Krebs, Gary Thickbroom, Dylan Edwards
BACKGROUND: Recovering hand function has important implications for improving independence of patients with tetraplegia after traumatic spinal cord injury (SCI). Transcranial direct current stimulation (tDCS) is a noninvasive rehabilitation technique that has potential to improve motor function. OBJECTIVE: To investigate the effects of one session of 1 mA, 2 mA, and sham anodal tDCS (a-tDCS) in the upper extremity (hand) motor performance (grasp and lease) in patients with chronic cervical SCI...
May 10, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28504465/effects-of-sa237-a-humanized-anti-interleukin-6-receptor-monoclonal-antibody-on-pre-and-postnatal-development-in-cynomolgus-monkey
#19
Ryuichi Katagiri, Kana Ishihara-Hattori, Werner Frings, Jun Amano, Antje Fuchs, Shuichi Chiba
BACKGROUND: SA237 is a humanized anti-interleukin-6 receptor (IL-6R) monoclonal antibody in which the constant and variable regions have been engineered for a longer plasma half-life. According to literature, blocking of IL-6 related functions could have an influence on pregnancy sustainment, development of the immune system, and brain growth. METHODS: SA237 effects on dams, embryo-fetal development, parturition and postnatal development were investigated in an enhanced pre- and postnatal development study, in which SA237 was subcutaneously administered to pregnant cynomolgus monkeys at dose levels of 2 or 50 mg/kg once weekly from gestation day 20 until parturition...
May 15, 2017: Birth Defects Res
https://www.readbyqxmd.com/read/28502103/reduced-platelet-aggregation-in-women-after-intercourse-a-possible-role-for-the-cyclooxygenase-pathway
#20
Gabriel Mayoral-Andrade, Laura Pérez-Campos-Mayoral, Abraham Majluf-Cruz, Eduardo Perez-Campos Mayoral, Carlos Perezcampos Mayoral, Ana Rocha-Núñez, Margarito Martinez, Edgar Zenteno, Leticia Hernandez-Gonzalez, María Guadalupe López Juan, Alma Dolores Pérez-Santiago, Eduardo Pérez-Campos
We hypothesise that molecules in the cyclooxygenase pathway affect platelet activity when seminal fluid (SF) is present. We considered the influence of SF on platelet aggregation in women, and believe that the prostanoids in SF signalling are significant. Thirty-one female subjects were studied, 20 of whom were sexually active. Male partners were given either aspirin or indomethacin to inhibit cyclooxygenase. The 6-keto prostaglandin F1α (6-keto PGF1α) and prostaglandin E metabolite (PGE-M) in SF were measured by competitive assay...
May 14, 2017: Clinical and Experimental Pharmacology & Physiology
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