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https://www.readbyqxmd.com/read/28213012/evaluating-and-improving-terminal-hygiene-practices-on-broiler-farms-to-prevent-campylobacter-cross-contamination-between-flocks
#1
Tara Battersby, D Walsh, P Whyte, D Bolton
The objectives of this study were to evaluate current cleaning practices in broiler houses by testing a range of sites after cleaning and disinfection and to test the efficacy of the most commonly used methods in a commercial broiler house after flock harvesting. Cleaning procedures on 20 broiler houses (10 separate farms) were examined by testing a range of sampling points (feeders, drinkers, walls, etc.) for total viable count (TVC), total Enterobacteriaceae count (TEC) and Campylobacter spp. after cleaning and disinfection, using culture based methods...
June 2017: Food Microbiology
https://www.readbyqxmd.com/read/28191758/preclinical-analysis-of-fetal-human-mesencephalic-neural-progenitor-cell-lines-characterization-and-safety-in-vitro-and-in-vivo
#2
Jisook Moon, Sigrid C Schwarz, Hyun-Seob Lee, Jun Mo Kang, Young-Eun Lee, Bona Kim, Mi-Young Sung, Günter Höglinger, Florian Wegner, Jin Su Kim, Hyung-Min Chung, Sung Woon Chang, Kwang Yul Cha, Kwang-Soo Kim, Johannes Schwarz
We have developed a good manufacturing practice for long-term cultivation of fetal human midbrain-derived neural progenitor cells. The generation of human dopaminergic neurons may serve as a tool of either restorative cell therapies or cellular models, particularly as a reference for phenotyping region-specific human neural stem cell lines such as human embryonic stem cells and human inducible pluripotent stem cells. We cultivated 3 different midbrain neural progenitor lines at 10, 12, and 14 weeks of gestation for more than a year and characterized them in great detail, as well as in comparison with Lund mesencephalic cells...
February 2017: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/28187777/gmp-conformant-on-site-manufacturing-of-a-cd133-stem-cell-product-for-cardiovascular-regeneration
#3
Anna Skorska, Paula Müller, Ralf Gaebel, Jana Große, Heiko Lemcke, Cornelia A Lux, Manuela Bastian, Frauke Hausburg, Nicole Zarniko, Sandra Bubritzki, Ulrike Ruch, Gudrun Tiedemann, Robert David, Gustav Steinhoff
BACKGROUND: CD133(+) stem cells represent a promising subpopulation for innovative cell-based therapies in cardiovascular regeneration. Several clinical trials have shown remarkable beneficial effects following their intramyocardial transplantation. Yet, the purification of CD133(+) stem cells is typically performed in centralized clean room facilities using semi-automatic manufacturing processes based on magnetic cell sorting (MACS®). However, this requires time-consuming and cost-intensive logistics...
February 10, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28181162/graphene-oxide-polymer-composite-langmuir-films-constructed-by-interfacial-thiol-ene-photopolymerization
#4
Xiaona Luo, Kai Ma, Tifeng Jiao, Ruirui Xing, Lexin Zhang, Jingxin Zhou, Bingbing Li
The effective synthesis and self-assembly of graphene oxide (GO) nanocomposites are of key importance for a broad range of nanomaterial applications. In this work, a one-step chemical strategy is presented to synthesize stable GO-polymer Langmuir composite films by interfacial thiol-ene photopolymerization at room temperature, without use of any crosslinking agents and stabilizing agents. It is discovered that photopolymerization reaction between thiol groups modified GO sheets and ene in polymer molecules is critically responsible for the formation of the composite Langmuir films...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28167769/multifunctional-inexpensive-and-reusable-nanoparticle-printed-biochip-for-cell-manipulation-and-diagnosis
#5
Rahim Esfandyarpour, Matthew J DiDonato, Yuxin Yang, Naside Gozde Durmus, James S Harris, Ronald W Davis
Isolation and characterization of rare cells and molecules from a heterogeneous population is of critical importance in diagnosis of common lethal diseases such as malaria, tuberculosis, HIV, and cancer. For the developing world, point-of-care (POC) diagnostics design must account for limited funds, modest public health infrastructure, and low power availability. To address these challenges, here we integrate microfluidics, electronics, and inkjet printing to build an ultra-low-cost, rapid, and miniaturized lab-on-a-chip (LOC) platform...
February 6, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28162773/enabling-microfluidics-from-clean-rooms-to-makerspaces
#6
REVIEW
David I Walsh, David S Kong, Shashi K Murthy, Peter A Carr
The traditional requirement for clean rooms and specialized skills has inhibited many biologists from pursuing new microfluidic innovations. Makerspaces provide a growing alternative to clean rooms: they provide low-cost access to fabrication equipment such as laser cutters, plotter cutters, and 3D printers; use commercially available materials; and attract a diverse community of product designers. This Opinion discusses the materials, tools, and building methodologies particularly suited for developing novel microfluidic devices in these spaces, with insight into biological applications and leveraging the maker community...
February 2, 2017: Trends in Biotechnology
https://www.readbyqxmd.com/read/28130913/selective-pre-column-derivatization-of-fatty-acids-with-the-fluorescent-tag-6-aminoquinoline-and-their-determination-in-some-food-samples-by-reversed-phase-chromatography
#7
Murthy Jonnada, Guadalupe Davila El Rassi, Ziad El Rassi
Fatty acids (FAs) have been selectively derivatized with a fluorescent tag, 6-aminoquinoline (6AQ), which yielded fluorescent FA-6AQ derivatives that have excitation (λexc = 270 nm) and emission (λemi = 495 nm) wavelengths that are farther apart. This precolumn derivatization is characterized by its simplicity occurring at room temperature between the carboxylic acid group of the FA and the amino group of 6AQ in the presence of a non-aqueous soluble carbodiimide coupling agent such as the N,N´-dicyclohexylcarbodiimide...
January 28, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28129761/snacks-beverages-and-physical-activity-during-volunteer-led-out-of-school-time-programs-a-cross-sectional-analysis
#8
Christina D Economos, Stephanie Anzman-Frasca, Alyssa H Koomas, Grace Chan, Sara C Folta, Julianne Heck, Molly Newman, Jennifer M Sacheck
BACKGROUND: Tens of millions of children regularly participate in out-of-school-time (OST) programs, providing an opportunity for child health promotion. Most research on OST has focused on structured, staff-led after-school programs, as opposed to volunteer-led programs such as enrichment programs and youth sports. The aim of this study was to describe snacks, beverages, and physical activity (PA) practices in volunteer-led OST programs across five organizations in three states. METHODS: An online survey including the Out-of-School-Time Snacks, Beverages, and Physical Activity Questionnaire was distributed to 1,695 adult leaders of enrichment and youth sports programs serving 5-12 year-old children in Maine, Massachusetts, and New Hampshire, USA...
January 27, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28118134/validation-of-the-accupoint-advanced-atp-hygiene-monitoring-system-for-sanitation-monitoring-through-detection-of-atp-from-stainless-steel-surfaces
#9
Ryan Viator, R Lucas Gray, Ron Sarver, Brent Steiner, Mark Mozola, Jennifer Rice
The AccuPoint Advanced ATP Hygeine Monitoring System was validated by an AOAC International <em>Performance Tested Method</em><sup>SM</sup> on the detection of ATP from stainless steel surfaces. Neogen Corp.'s system is a lightweight, hand-held diagnostic tool used to validate and verify a hygiene program's effectiveness by detecting organic residues remaining on surfaces and in liquids after cleaning. The system is composed of three primary components: an electronic luminometer, fully self-contained single-use samplers, and software...
November 30, 2016: Journal of AOAC International
https://www.readbyqxmd.com/read/28116388/initial-stages-of-co2-adsorption-on-cao-a-combined-experimental-and-computational-study
#10
Brian H Solis, Yi Cui, Xuefei Weng, Jan Seifert, Swetlana Schauermann, Joachim Sauer, Shamil Shaikhutdinov, Hans-Joachim Freund
Room temperature adsorption of carbon dioxide (CO2) on monocrystalline CaO(001) thin films grown on a Mo(001) substrate was studied by infrared reflection-absorption spectroscopy (IRAS) and quantum chemical calculations. For comparison, CO2 adsorption was examined on poorly ordered, nanoparticulate CaO films prepared on Ru(0001). For both systems, CO2 readily adsorbs on the clean CaO surface. However, additional bands were observable on the CaO/Ru(0001) films compared with CaO/Mo(001), because the stricter IRAS surface selection rules do not apply to adsorption on the disordered thin films grown on Ru(0001)...
January 24, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28105672/on-the-advantage-of-cyclic-over-acyclic-carbenes-to-access-isolable-capto-dative-c-centered-radicals
#11
Janell Mahoney, Rodolphe Jazzar, Guy Royal, David Martin, Guy Bertrand
A cyclic and an acyclic di(amino)carbene as well as a cyclic and an acyclic (alkyl)(amino)carbene cleanly react with benzoyl chloride to give the corresponding adducts 1+cyc, 1+acy, 2+cyc and 2+acy, respectively. The reduction of 1+cyc and 2+cyc derived from cyclic carbenes affords the corresponding radicals 1cyc and 2cyc that are stable at room temperature. In contrast, radicals 1acy and 2acy, derived from acyclic carbenes, cannot be isolated. It is shown that 1acy is as thermodynamically stabilized as its cyclic counterpart 1cyc, but its instability is the result β-hydrogens of the nitrogen substituent, along with the enhanced flexibility around C-N bonds, which allow for a H-migration-elimination process...
January 19, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28104287/enhanced-terminal-room-disinfection-and-acquisition-and-infection-caused-by-multidrug-resistant-organisms-and-clostridium-difficile-the-benefits-of-enhanced-terminal-room-disinfection-study-a-cluster-randomised-multicentre-crossover-study
#12
Deverick J Anderson, Luke F Chen, David J Weber, Rebekah W Moehring, Sarah S Lewis, Patricia F Triplett, Michael Blocker, Paul Becherer, J Conrad Schwab, Lauren P Knelson, Yuliya Lokhnygina, William A Rutala, Hajime Kanamori, Maria F Gergen, Daniel J Sexton
BACKGROUND: Patients admitted to hospital can acquire multidrug-resistant organisms and Clostridium difficile from inadequately disinfected environmental surfaces. We determined the effect of three enhanced strategies for terminal room disinfection (disinfection of a room between occupying patients) on acquisition and infection due to meticillin-resistant Staphylococcus aureus, vancomycin-resistant enterococci, C difficile, and multidrug-resistant Acinetobacter. METHODS: We did a pragmatic, cluster-randomised, crossover trial at nine hospitals in the southeastern USA...
January 16, 2017: Lancet
https://www.readbyqxmd.com/read/28100179/exploring-surface-cleaning-strategies-in-hospital-to-prevent-contact-transmission-of-methicillin-resistant-staphylococcus-aureus
#13
Hao Lei, Rachael M Jones, Yuguo Li
BACKGROUND: Cleaning of environmental surfaces in hospitals is important for the control of methicillin-resistant Staphylococcus aureus (MRSA) and other hospital-acquired infections transmitted by the contact route. Guidance regarding the best approaches for cleaning, however, is limited. METHODS: In this study, a mathematical model based on ordinary differential equations was constructed to study MRSA concentration dynamics on high-touch and low-touch surfaces, and on the hands and noses of two patients (in two hospitals rooms) and a health care worker in a hypothetical hospital environment...
January 18, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28097044/study-on-the-single-dose-toxicity-of-shineumhur-pharmacopuncture-injected-into-the-muscles-of-rats
#14
Hohyun Jeong, Eunhye Cha, Jongcheol Lee, Seongjin Lee, Manyong Park, Dongwoung Kim, Bongkeun Song, Jongdeok Lee, Sungchul Kim
OBJECTIVES: This study was carried out to analyze the single dose toxicity of ShinEumHur (SEH) pharmacopuncture injected into the muscles of Sprague-Dawley rats. METHODS: The SEH pharmacopuncture was made in a clean room at the Korean Pharmacopuncture Institute (K-GMP). After the mixing process with sterile distilled water had been completed, the pH was controlled to between 7.0 and 7.5. All experiments were conducted at Biotoxtech, an institution authorized to perform non-clinical studies under the Good Laboratory Practice (GLP) regulations...
December 2016: Journal of Pharmacopuncture
https://www.readbyqxmd.com/read/28063141/influence-of-atomic-hydrogen-band-bending-and-defects-in-the-top-few-nanometers-of-hydrothermally-prepared-zinc-oxide-nanorods
#15
Mubarak J Al-Saadi, Salim H Al-Harthi, Htet H Kyaw, Myo T Z Myint, Tanujjal Bora, Karthik Laxman, Ashraf Al-Hinai, Joydeep Dutta
We report on the surface, sub-surface (top few nanometers) and bulk properties of hydrothermally grown zinc oxide (ZnO) nanorods (NRs) prior to and after hydrogen treatment. Upon treating with atomic hydrogen (H*), upward and downward band bending is observed depending on the availability of molecular H2O within the structure of the NRs. In the absence of H2O, the H* treatment demonstrated a cleaning effect of the nanorods, leading to a 0.51 eV upward band bending. In addition, enhancement in the intensity of room temperature photoluminescence (PL) signals due to the creation of new surface defects could be observed...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28061421/low-cost-and-facile-fabrication-of-a-paper-based-capillary-electrophoresis-microdevice-for-pathogen-detection
#16
Jee Won Lee, Dohwan Lee, Yong Tae Kim, Eun Yeol Lee, Do Hyun Kim, Tae Seok Seo
This paper describes the development of a novel paper-based capillary electrophoresis (pCE) microdevice using mineral paper, which is durable, oil and tear resistant, and waterproof. The pCE device is inexpensive (~$1.6 per device for materials), simple to fabricate, lightweight, and disposable, so it is more adequate for point-of-care (POC) pathogen diagnostics than a conventional CE device made of glass, quartz, silicon or polymer. In addition, the entire fabrication process can be completed within 1h without using expensive clean room facilities and cumbersome photolithography procedures...
December 28, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28050814/what-orthopaedic-operating-room-surfaces-are-contaminated-with-bioburden-a-study-using-the-atp-bioluminescence-assay
#17
Raveesh Daniel Richard, Thomas R Bowen
BACKGROUND: Contaminated operating room surfaces can increase the risk of orthopaedic infections, particularly after procedures in which hardware implantation and instrumentation are used. The question arises as to how surgeons can measure surface cleanliness to detect increased levels of bioburden. This study aims to highlight the utility of adenosine triphosphate (ATP) bioluminescence technology as a novel technique in detecting the degree of contamination within the sterile operating room environment...
January 3, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28026107/a-hierarchical-task-analysis-of-shoulder-arthroscopy-for-a-virtual-arthroscopic-tear-diagnosis-and-evaluation-platform-vatdep
#18
Doga Demirel, Alexander Yu, Seth Cooper-Baer, Aditya Dendukuri, Tansel Halic, Sinan Kockara, Nizamettin Kockara, Shahryar Ahmadi
BACKGROUND: Shoulder arthroscopy is a minimally invasive surgical procedure for diagnosis and treatment of a shoulder pathology. The procedure is performed with a fiber optic camera, called arthroscope, and instruments inserted through very tiny incisions made around the shoulder. The confined shoulder space, unintuitive camera orientation and constrained instrument motions complicates the procedure. Therefore, surgical competence in arthroscopy entails extensive training especially for psychomotor skills development...
December 27, 2016: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28026063/materials-with-giant-mechanocaloric-effects-cooling-by-strength
#19
Lluís Mañosa, Antoni Planes
The search for materials with large caloric effects has become a major challenge in material science due to their potential in developing near room-temperature solid-state cooling devices, which are both efficient and clean, and that can successfully replace present refrigeration technologies. There are three main families of caloric materials: magnetocaloric, electrocaloric, and mechanocaloric. While magnetocaloric and electrocaloric materials have been studied intensively in the last few decades, mechanocaloric materials are only very recently receiving a great deal of attention...
December 27, 2016: Advanced Materials
https://www.readbyqxmd.com/read/28000297/use-of-free-tissue-transfer-in-head-and-neck-cancer-surgery-and-risk-of-overall-and-serious-complication-s-an-american-college-of-surgeons-national-surgical-quality-improvement-project-analysis-of-free-tissue-transfer-to-the-head-and-neck
#20
Steven B Cannady, Kyle M Hatten, Andres M Bur, Jason Brant, John P Fischer, Jason G Newman, Ara A Chalian
BACKGROUND: The purpose of this article was to assess the rates of head and neck free tissue transfer and variables available in the American College of Surgeons - National Surgical Quality Improvement Project (ACS-NSQIP) dataset to predict overall and serious complications. METHODS: We conducted a data analysis from 2005 to 2014 on free tissue cases in the head and neck with descriptive and cross-sectional analysis to examine correlation of NSQIP variables with complications (p < ...
December 21, 2016: Head & Neck
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