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Astha Garg, Charles A Cartier, Kyle J M Bishop, Darrell Velegol
The zeta potential of a particle characterizes its motion in an electric field and is often thought to be negligible at high ionic strength (several moles per liter) due to thinning of the electrical double layer (EDL). Here, we describe zeta potential measurements on polystyrene latex (PSL) particles at monovalent salt concentrations up to saturation (~ 5 M NaCl) using electrophoresis in sinusoidal electric fields and high-speed video microscopy. Our measurements reveal that the zeta potential remains finite at even the highest concentrations...
October 21, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
Matthieu Delion, Mickael Dinomais, Philippe Mercier
Surgery of the posterior fossa represents a technical challenge because of the proximity of the vessels of the cerebellum. If the arterial vascularization of the cerebellum is well known, the main arterial variations and the whole venous vascularization are probably under recognized. We describe the vascular organization and the main variations through photographs of colored latex perfused brains, obtained with a surgical microscope. The arterial vascularization of the cerebellum is based on three arteries which all originate from the vertebrobasilar system: the superior cerebellar artery (SCA), the anterior and inferior cerebellar artery (AICA), and the posterior and inferior cerebellar artery (PICA)...
October 20, 2016: Cerebellum
Rafael Vilhena de Carvalho Fürst, Afonso César Polimanti, Sidnei José Galego, Maria Claudia Bicudo, Erik Montagna, João Antônio Corrêa
OBJECTIVE: To present a simple and affordable model able to properly simulate an ultrasound-guided venous access. DESIGN: The simulation was made using a latex balloon tube filled with water and dye solution implanted in a thawed chicken breast with bones. RESULTS: The presented model allows the simulation of all implant stages of a central catheter. The obtained echogenicity is similar to that observed in human tissue, and the ultrasound identification of the tissues, balloon, needle, wire guide and catheter is feasible and reproducible...
October 20, 2016: World Journal of Surgery
Brenda Anna Kwambana-Adams, Franklin Asiedu-Bekoe, Badu Sarkodie, Osei Kuffour Afreh, George Khumalo Kuma, Godfred Owusu-Okyere, Ebenezer Foster-Nyarko, Sally-Ann Ohene, Charles Okot, Archibald Kwame Worwui, Catherine Okoi, Madikay Senghore, Jacob Kweku Otu, Chinelo Ebruke, Richard Bannerman, Kwame Amponsa-Achiano, David Opare, Gemma Kay, Timothy Letsa, Owen Kaluwa, Ebenezer Appiah-Denkyira, Victor Bampoe, Syed M A Zaman, Mark J Pallen, Umberto D'Alessandro, Jason M Mwenda, Martin Antonio
BACKGROUND: An outbreak of pneumococcal meningitis among non-infant children and adults occurred in the Brong-Ahafo region of Ghana between December 2015 and April 2016 despite the recent nationwide implementation of a vaccination programme for infants with the 13-valent pneumococcal conjugate vaccine (PCV13). METHODS: Cerebrospinal fluid (CSF) specimens were collected from patients with suspected meningitis in the Brong-Ahafo region. CSF specimens were subjected to Gram staining, culture and rapid antigen testing...
October 18, 2016: BMC Infectious Diseases
Maryam Kashanian, Farnaz Aghbali
OBJECTIVE: The purpose of the present study is to evaluate the diagnostic value of maternal serum high sensitive C-reactive protein (hs-CRP) measurement during the first trimester of pregnancy for predicting of pre-eclampsia. DESIGN AND METHOD: A prospective cohort study was performed on 394 pregnant women who were at the gestational age of 8-13 weeks of pregnancy. In all women, serum hs-CRP was measured by latex agglutination test. The women were then monitored to delivery...
September 2016: Journal of Hypertension
Kashanian Maryam, Aghbali Farnaz
OBJECTIVE: The purpose of the present study is to evaluate the diagnostic value of maternal serum high sensitive C-reactive protein (hs-CRP) measurement during the first trimester of pregnancy for predicting of pre-eclampsia. DESIGN AND METHOD: A prospective cohort study was performed on 394 pregnant women who were at the gestational age of 8-13 weeks of pregnancy. In all women serum hs-CRP was measured by latex agglutination test. The women were then monitored to delivery...
September 2016: Journal of Hypertension
Ruofei Bu, Hillel Price, Sorin Mitran, Carlton Zdanski, Amy L Oldenburg
Quantitative endoscopic imaging is at the vanguard of novel techniques in the assessment upper airway obstruction. Anatomic optical coherence tomography (aOCT) has the potential to provide the geometry of the airway lumen with high-resolution and in 4 dimensions. By coupling aOCT with measurements of pressure, optical coherence elastography (OCE) can be performed to characterize airway wall stiffness. This can aid in identifying regions of dynamic collapse as well as informing computational fluid dynamics modeling to aid in surgical decision-making...
2016: Proceedings of SPIE
Roshan Chudal, Andre Sourander, Heljä-Marja Surcel, Dan Sucksdorff, Susanna Hinkka-Yli-Salomäki, Alan S Brown
OBJECTIVES: C-reactive protein (CRP) is a well-established general marker of inflammation from both infectious and noninfectious exposures. Previous studies have shown that maternal CRP is associated with an increased risk of autism and schizophrenia. The aim of this study was to examine the association between early to mid-gestational serum CRP levels, prospectively assayed in maternal sera, and the risk of bipolar disorder (BPD). METHODS: This study is derived from the Finnish Prenatal Study of Bipolar Disorder (FIPS-B), based on a nested case-control study design...
October 11, 2016: Journal of Affective Disorders
Camila Quartim de Moraes Bruna, Rafael Queiroz de Souza, Irineu Francisco Silva Massaia, Áurea Silveira Cruz, Kazuko Uchikawa Graziano
Objectives: to determine if there are differences on the safety of the preparation of clean surgical instruments using different types of gloves and bare hands and evaluate the microbiological load of these preparations without gloves. Method: laboratory procedure with a pragmatic approach, in which the samples were handled with different types of gloves and bare hands. In addition, cytotoxicity assays were carried out by means of the agar diffusion method. Further samples were subjected to microbiological analysis after being handled without gloves...
October 10, 2016: Revista Latino-americana de Enfermagem
Marcelo Luiz Brandão, Paulo Roberto Melo Reis, Lilhian Alves de Araújo, Ana Carolina Vicente Araújo, Maisa Helena de Abreu Silva Santos, Marina Pacheco Miguel
PURPOSE: To compare the use of latex derivative and Aloe vera extract to wound healing. METHODS: Twenty one rats were randomly divided into three groups and each one had a wound made by incision. The treatment consisted in: derivative of latex (GL), Aloe vera extract (GA) and saline solution (GC). The wound area was measured on the 7th, 14th and 21st days and macroscopic and microscopic evaluation were done. RESULTS: The comparison between the measurements of the wounds presented statistical difference in GC and GA from the 7th day of evaluation and GL from the 14th day...
September 2016: Acta Cirúrgica Brasileira
Haci Polat, Umut Gulacti
PURPOSE: To find answers to some catheter-related questions in hypospadias repair such as which type of catheter should be used, with which catheter balloon inflation volume, and when should the catheter be removed from the urethra? As catheter use and post-op retention time varies among surgeons in hypospadias repair. MATERIAL AND METHODS: Fifty-four 10 French all-silicone- and 54 latex Foley catheters were prepared and assigned to groups as senary. The catheter's balloons were inflated with 2, 3 and 5 mL of sterile water...
October 10, 2016: Urology Journal
Emilio Trignano, Nefer Fallico, Gino Zingone, Luca Andrea Dessy, Gian Vittorio Campus
Background Microsurgery is very challenging, requiring a high degree of dexterity and manual skills that should be fully trained outside of the operating room. Common microsurgery courses usually follow a stepwise training approach beginning practice on nonliving models and proceeding with live rats. However, training on live rats raises certain issues, including ethical concerns as well as the associated costs. As such, there is an increasing drive toward alternative models. The current article describes a three-step training approach (latex glove-endovascular prosthesis-human placenta), which aims to prepare trainees for the clinical direct application...
October 12, 2016: Journal of Reconstructive Microsurgery
Mehtap Haktanir Abul, Selim Dereci, Sadan Hacisalihoglu, Fazil Orhan
BACKGROUND: Although kiwifruit is known as a common cause of food allergy, population based studies concerning the prevalence of kiwifruit allergy does not exist. We aimed to determine the prevalence and clinical characteristics of IgE-mediated kiwifruit allergy in 6-18 year old urban schoolchildren in a region where kiwifruit is widely cultivated METHODS: This cross-sectional study recruited 20,800 of the randomly selected 6-18-year-old urban schoolchildren from the Rize city in the eastern Black Sea region of Turkey during 2013...
October 12, 2016: Pediatric Allergy and Immunology
Trivikram Nallamilli, Srikanth Ragothaman, Madivala G Basavaraj
In this study we explore the self assembly of oppositely charged latex particles at decane water interfaces. Two spreading protocols have been proposed in this context. In the first method oppositely charged particles are mixed prior to spreading at the interface, this is called "premixed-mixtures". In the second protocol negatively charged particles are first spread at the interface at known coverage followed by spreading positively charged particles at known coverage and this is called "sequential-mixtures"...
October 4, 2016: Journal of Colloid and Interface Science
Osama M Ahmed, Hanaa I Fahim, Magdy W Boules, Heba Y Ahmed
The present study aims to assess the toxic effect of latex and ethanolic leaf extract of Calotropis procera (C. procera), in comparison to abamectin, on serum biomarkers of function and histological integrity of heart and testis in male albino rats. To achieve this aim, the albino rats were separately administered 1/20 and 1/10 of LD50 of C. procera latex, ethanolic C. procera leaf extract and abamectin respectively by oral gavage for 4 and 8 weeks. C. procera latex and leaf extract as well as abamectin markedly elevated the activities of serum CK-MB, AST and LDH at the two tested periods in a dose dependent manner...
2016: SpringerPlus
Hamza Al-Shehri, Tommy S Horozov, Vesselin N Paunov
We prepared model porous composite supra-particles and investigated the effect of the initial infused fluid phase on their attachment at the liquid-fluid interface. We used a simple method for fabrication of millimetre-sized spherical porous supra-particles from much smaller monodisperse latex microparticles as building blocks by evaporation of a polystyrene sulphate latex suspension on a hot super-hydrophobic surface. We annealed the dried supra-particles at the polymer's glass transition temperature to fuse partially their latex particle building blocks...
October 12, 2016: Soft Matter
Brianne Bordes, David Martin, Brian Schloss, Allan Beebe, Walter Samora, Jan Klamar, David Stukus, Joseph D Tobias
When hemodynamic or respiratory instability occurs intraoperatively, the inciting event must be determined so that a therapeutic plan can be provided to ensure patient safety. Although generally uncommon, one cause of cardiorespiratory instability is anaphylactic reactions. During anesthetic care, these most commonly involve neuromuscular blocking agents, antibiotics, or latex. Floseal is a topical hemostatic agent that is frequently used during orthopedic surgical procedures to augment local coagulation function and limit intraoperative blood loss...
July 2016: Journal of Pediatric Pharmacology and Therapeutics: JPPT: the Official Journal of PPAG
Vesselin N Paunov, Hamza Al-Shehri, Tommy S Horozov
We developed and tested a theoretical model for the attachment of fluid-infused porous supra-particles to a fluid-liquid interface. We considered the wetting behaviour of agglomerated clusters of particles, typical of powdered materials dispersed in a liquid, as well as of the adsorption of liquid-infused colloidosomes at the liquid-fluid interface. The free energy of attachment of a composite spherical porous supra-particle made from much smaller aggregated spherical particles to the oil-water interface was calculated...
September 29, 2016: Physical Chemistry Chemical Physics: PCCP
Zheng Tong, Yong Sun, Dan Wang, Limin Wang, Ling Li, Xueru Meng, Weiqiang Feng, Eve Syrkin Wurtele, Xuchu Wang
Latex in the laticiferous cell network of Hevea brasiliensis tree is composed of cytoplasm that synthesizes natural rubber. Ethylene stimulation of the tree bark enhances latex production partly by prolonging the duration of latex flow during the tapping process. Here, we identified an osmotin-like cDNA sequence (HbOsmotin) from H. brasiliensis that belongs to the pathogenesis-related 5 (PR-5) gene family. The HbOsmotin protein is present in the lutoids of latex in H. brasiliensis, whereas in onion epidermal cells, this protein is predominantly distributed around the cell wall, suggesting that it may be secreted from the cytoplasm...
September 26, 2016: Plant Physiology and Biochemistry: PPB
Dan Wang, Yong Sun, Zheng Tong, Qian Yang, Lili Chang, Xueru Meng, Limin Wang, Weimin Tian, Xuchu Wang
The extraction of high-purity proteins from the washing solution (WS) of rubber particles (also termed latex-producing organelles) from laticifer cells in rubber tree for proteomic analysis is challenging due to the low concentration of proteins in the WS. Recent studies have revealed that proteins in the WS might play crucial roles in natural rubber biosynthesis. To further examine the involvement of these proteins in natural rubber biosynthesis, we designed an efficiency method to extract high-purity WS proteins...
October 4, 2016: Electrophoresis
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