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https://www.readbyqxmd.com/read/28646246/identification-of-particles-in-raw-materials
#1
Kathryn Lee, Markus Lankers, Oliver Valet
Raw materials need to be of a certain quality with respect to physical and chemical composition. They also need to have no contaminants in the form of particles because these could get into the product or indicate the raw materials are not pure enough to make a good quality product. When particles are found, it is important to identify their chemical and elemental composition to correct any process errors that can cause them and to have acceptable quality of the final product. Sources of materials can be the environment, process equipment and processing, and packaging...
June 23, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28643881/virucides-in-apiculture-persistence-of-surrogate-enterovirus-under-simulated-field-conditions
#2
Jana Prodělalová, Hana Malenovská, Romana Moutelíková, Dalibor Titěra
BACKGROUND: Honeybee viruses were recognized among the most important factors leading to colony losses worldwide. Colony food and faeces were regarded as possible source of infectious viruses able to contaminate environment and equipment of apiaries. Thus, methods for elimination of viruses are required. No cell culture assay for testing the effect of disinfectants on honeybee viruses is available yet. Therefore, surrogate virus was employed for testing of iodophor- and peracetic acid-based disinfectants efficacy in combination with six organic contaminants at +6 °C and +22 °C...
June 23, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28643098/-importance-of-wound-irrigation-solutions-and-fluids-with-antiseptic-effects-in-therapy-and-prophylaxis-update-2017
#3
REVIEW
Christian Willy, Catharina Scheuermann-Poley, Marcus Stichling, Thomas von Stein, Axel Kramer
INTRODUCTION: Despite the use of modern antibiotics as well as complex perioperative, intraoperative and postoperative prophylactic measures, the rate of surgical site infections (SSI) could not be significantly reduced. The introduction of biocompatible antiseptic drugs with a high microbiocidal effect provided a successful alternative for infection prevention and therapy, particularly in a time of increasing occurrence of multi-drug resistant pathogens. Hence, questions about the risk-benefit ratio of antiseptic wound irrigation solutions, the prophylactic use of wound irrigation solutions for the reduction of SSI and the effect of negative pressure wound therapy combined with instillation (NPWTi) need to be answered...
June 22, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28641137/real-time-pcr-methods-for-the-detection-of-blown-pack-spoilage-causing-clostridium-species-c-estertheticum-c-gasigenes-and-c-ruminantium
#4
Rachael Reid, Catherine M Burgess, Evonne McCabe, Séamus Fanning, Paul Whyte, Joe Kerry, Declan Bolton
A set of real-time PCR methods for the detection of C. estertheticum, C. gasigenes and C. ruminantium, the causative agents of blown pack spoilage (BPS) in vacuum packaged beef, was developed. Robust validation of the sensitivity and specificity was carried out in the three matrices (beef meat drip, wet environmental swabs and dry environmental swabs) as encountered in our testing laboratory and against Clostridium strains (n=76) and non-Clostridium strains (n=36). It was possible to detect 4-5 spores per ml for C...
June 3, 2017: Meat Science
https://www.readbyqxmd.com/read/28636458/contamination-of-firefighter-personal-protective-equipment-and-skin-and-the-effectiveness-of-decontamination-procedures
#5
Kenneth W Fent, Barbara Alexander, Jennifer Roberts, Shirley Robertson, Christine Toennis, Deborah Sammons, Stephen Bertke, Steve Kerber, Denise Smith, Gavin Horn
Firefighters' skin may be exposed to chemicals via permeation/penetration of combustion byproducts through or around personal protective equipment (PPE) or from the cross-transfer of contaminants on PPE to the skin. Additionally, volatile contaminants can evaporate from PPE following a response and be inhaled by firefighters. Using polycyclic aromatic hydrocarbons (PAHs) and volatile organic compounds (VOCs) as respective markers for non-volatile and volatile substances, we investigated the contamination of firefighters' turnout gear and skin following controlled residential fire responses...
June 21, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/28636053/evidence-of-bad-recycling-practices-bfrs-in-children-s-toys-and-food-contact-articles
#6
A Guzzonato, F Puype, S J Harrad
Brominated flame retardants (BFRs) have been used intentionally in a wide range of plastics, but are now found in an even wider range of such materials (including children's toys and food contact articles) as a result of recycling practices that mix BFR-containing waste plastics with "virgin" materials. In this study Br was quantified in toy and food contact samples on the assumption that its concentration can be used as a metric for BFR contamination. Subsequently, compound specific determination of BFRs was performed to evaluate the validity of the aforementioned assumption, crucial to render rapid, inexpensive, in situ Br determination in non-laboratory environments (such as waste handling facilities) a viable option for sorting wastes according to their BFR content...
June 21, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28623655/the-thin-layer-microchromatography-%C3%AE-tlc-and-tlc-fid-technique-as-a-new-methodology-in-the-study-of-lubricating-oils
#7
Paulina Nowak, Judyta Kosińska, Marta Glinka, Marian Kamiński
This paper concerns the possibility of using TLC coupled with a flame ionization detector (FID) and micro-TLC (μTLC) asprecursors for microfluidized devices of analytical techniques to identify and determine the presence and content of the petroleum/vegetable oil base in the lubricating oils applied in cutting devices (chainsaws). This research is related to the problem of ensuring, in compliance with the requirements of environmental protection, a sufficient level of biodegradability of lubricating oils emitted to the environment during operation of equipment lubricated with these oils...
June 16, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28623002/quantitative-assessment-of-interactions-between-hospitalized-patients-and-portable-medical-equipment-and-other-fomites
#8
Nuntra Suwantarat, Laura A Supple, Jennifer L Cadnum, Thriveen Sankar, Curtis J Donskey
In an observational study, we demonstrated that hospitalized patients frequently had direct or indirect interactions with medical equipment and other fomites that are shared among patients, and these items were often contaminated with health care-associated pathogens. There is a need for protocols to ensure routine cleaning of shared portable equipment.
June 13, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28620612/potential-role-of-pet-cats-as-a-sentinel-species-for-human-exposure-to-flame-retardants
#9
Luis A Henríquez-Hernández, Elena Carretón, María Camacho, José Alberto Montoya-Alonso, Luis D Boada, Verónica Bernal Martín, Yaiza Falcón Cordón, Soraya Falcón Cordón, Manuel Zumbado, Octavio P Luzardo
Flame retardants are a wide group of chemicals used by the industry to avoid combustion of materials. These substances are commonly found in plastics, electronic equipment, fabrics, and in many other everyday articles. Subsequently, ubiquitous environmental contamination by these common chemical is frequently reported. In the present study, we have evaluated the level of exposure to polychlorinated biphenyls (PCBs), brominated diphenyl ethers (BDEs), and organophosphorous flame retardants (OPFRs) in pet cats through the analysis of their serum...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28606192/assessment-of-healthcare-worker-protocol-deviations-and-self-contamination-during-personal-protective-equipment-donning-and-doffing
#10
Jennie H Kwon, Carey-Ann D Burnham, Kimberly A Reske, Stephen Y Liang, Tiffany Hink, Meghan A Wallace, Angela Shupe, Sondra Seiler, Candice Cass, Victoria J Fraser, Erik R Dubberke
OBJECTIVE To evaluate healthcare worker (HCW) risk of self-contamination when donning and doffing personal protective equipment (PPE) using fluorescence and MS2 bacteriophage. DESIGN Prospective pilot study. SETTING Tertiary-care hospital. PARTICIPANTS A total of 36 HCWs were included in this study: 18 donned/doffed contact precaution (CP) PPE and 18 donned/doffed Ebola virus disease (EVD) PPE. INTERVENTIONS HCWs donned PPE according to standard protocols. Fluorescent liquid and MS2 bacteriophage were applied to HCWs...
June 13, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/28602276/fungal-aerocontamination-exposure-risk-for-patients-in-3-successive-locations-of-a-pediatric-hematology-unit-department-influence-of-air-equipment-and-building-structure-on-air-quality
#11
Anne-Pauline Bellanger, Gabriel Reboux, Florent Demonmerot, Houssein Gbaguidi-Haore, Laurence Millon
BACKGROUND: Invasive fungal infections (IFIs) play an important role in the mortality of immunocompromised patients. The pediatric hematology department (PHD) at Besançon University Hospital has relocated 3 times: (1) from a building without an air filtration system (B1), (2) to a renovated building with low air pressure (B2), and (3) to a new building with high air pressure and high-efficiency particulate air filters (B3). This study aimed to investigate how these relocations influenced the fungal exposure risk for the PHD's patients...
June 8, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28599133/dose-on-demand-production-of-diverse-18-f-radiotracers-for-preclinical-applications-using-a-continuous-flow-microfluidic-system
#12
Lidia Matesic, Annukka Kallinen, Ivan Greguric, Giancarlo Pascali
INTRODUCTION: The production of (18)F-radiotracers using continuous flow microfluidics is under-utilized due to perceived equipment limitations. We describe the dose-on-demand principle, whereby the back-to-back production of multiple, diverse (18)F-radiotracers can be prepared on the same day, on the same microfluidic system using the same batch of [(18)F]fluoride, the same microreactor, the same HPLC column and SPE cartridge to obtain a useful production yield. METHODS: [(18)F]MEL050, [(18)F]Fallypride and [(18)F]PBR111 were radiolabeled with [(18)F]fluoride using the Advion NanoTek Microfluidic Synthesis System...
June 2, 2017: Nuclear Medicine and Biology
https://www.readbyqxmd.com/read/28598344/occurrence-of-legionella-in-showers-at-recreational-facilities
#13
Patrizia De Filippis, Cinzia Mozzetti, Massimo Amicosante, Gian Loreto D'Alò, Alessandra Messina, Donatella Varrenti, Roberto Giammattei, Floriana Di Giorgio, Stefania Corradi, Alberto D'Auria, Roberta Fraietta, Rosanna Gabrieli
Critical environments, including water systems in recreational settings, represent an important source of Legionella pneumophila infection in humans. In order to assess the potential risk for legionellosis, we analyzed Legionella contamination of water distribution systems in 36 recreational facilities equipped with swimming pools. One hundred and sixty water samples were analyzed from shower heads or taps located in locker rooms or in bathrooms. By culture method and polymerase chain reaction, 41/160 samples were positive for Legionella from 12/36 recreational centers...
June 2017: Journal of Water and Health
https://www.readbyqxmd.com/read/28589272/heavy-metals-distribution-and-risk-assessment-in-soil-from-an-informal-e-waste-recycling-site-in-lagos-state-nigeria
#14
Khadijah A Isimekhai, Hemda Garelick, John Watt, Diane Purchase
Informal E-waste recycling can pose a risk to human health and the environment which this study endeavours to evaluate. The distribution of a number of heavy metals in soil from an informal recycling site in the largest market for used and new electronics and electrical equipment in West Africa was investigated. The potential bioavailability of heavy metals, extent of contamination, potential risk due to the recycling activities and impact of external factors such as rainfall were also assessed. The concentrations of all the heavy metals tested were higher in the area where burning of the waste occurred than at the control site, suggesting an impact of the recycling activities on the soil...
June 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28585863/contamination-of-carcasses-and-utensils-in-small-swine-slaughterhouses-by-salmonella-in-the-northwestern-region-of-the-state-of-rio-de-janeiro-brazil
#15
Claudius Couto Cabral, Pedro Henrique Nunes Panzenhagen, Karina Frensel Delgado, Gabriela Rodrigues Alves Silva, Dália Dos Prazeres Rodrigues, Robson Maia Franco, Carlos Adam Conte-Junior
Salmonella is a major foodborne pathogen that constantly threatens food safety in developed countries and underdeveloped countries such as Brazil, where it is responsible for 38% of notified cases of foodborne illness. Swine are one of the main meat-producing species that may asymptomatically carry Salmonella, periodically shedding the bacteria through feces. The state of Rio de Janeiro is not a major producer of swine meat, but small slaughterhouses are operational and produce meat for consumption within the state, although few studies have been conducted in the region...
June 6, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28577357/assessing-the-effect-of-patient-screening-and-isolation-on-curtailing-clostridium-difficile-infection-in-hospital-settings
#16
Sara Maghdoori, Seyed M Moghadas
BACKGROUND: Patient screening at the time of hospital admission is not recommended as a routine practice, but may be an important strategy for containment of Clostridium difficile infection (CDI) in hospital settings. We sought to investigate the effect of patient screening in the presence of asymptomatic carriers and in the context of imperfect patient isolation. METHODS: We developed and parameterized a stochastic simulation model for the transmission dynamics of CDI in a hospital ward...
June 2, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28575840/typing-dna-profiles-from-previously-enhanced-fingerprints-using-direct-pcr
#17
Jennifer E L Templeton, Duncan Taylor, Oliva Handt, Adrian Linacre
Fingermarks are a source of human identification both through the ridge patterns and DNA profiling. Typing nuclear STR DNA markers from previously enhanced fingermarks provides an alternative method of utilising the limited fingermark deposit that can be left behind during a criminal act. Dusting with fingerprint powders is a standard method used in classical fingermark enhancement and can affect DNA data. The ability to generate informative DNA profiles from powdered fingerprints using direct PCR swabs was investigated...
May 21, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28575800/remediation-of-soil-contaminated-with-organic-and-inorganic-wood-impregnation-chemicals-by-soil-washing
#18
Jurate Kumpiene, Désirée Nordmark, Ivan Carabante, Jūratė Sužiedelytė-Visockienė, Vladislovas Česlovas Aksamitauskas
The aim of this study was to evaluate the efficiency of a large scale washing/wet sieving technique for a soil contaminated with wood impregnation chemicals by 1) defining the final distribution of trace elements (As, Cu, Cr, Zn) and polycyclic aromatic hydrocarbons (PAH) in separated soil particle size fractions; and 2) defining the leaching behavior of the contaminants in these soil fractions. A soil washing experiment was implemented at waste management facility in Sweden using a full scale soil sorting and washing equipment...
May 23, 2017: Chemosphere
https://www.readbyqxmd.com/read/28573089/pakistan-needs-to-speed-up-its-human-immunodeficiency-virus-control-strategy-to-achieve-targets-in-fast-track-acquired-immune-deficiency-syndrome-response
#19
Yasir Waheed, Hasnain Waheed
In last fifteen years remarkable success in the fight against human immunodeficiency virus (HIV) is achieved globally. The number of HIV infections has decreased and the number of people on antiretroviral therapy is increased. This all is possible by strong political commitments and heavy investments in the fight against HIV. Pakistan is among few Asian countries in which HIV cases are increasing year by year since 1990. There are 94000 cases of HIV in Pakistan and only 14000 are registered with government...
May 12, 2017: World Journal of Virology
https://www.readbyqxmd.com/read/28571447/an-integrated-and-multi-purpose-microscope-for-the-characterization-of-atomically-thin-optoelectronic-devices
#20
Adolfo De Sanctis, Gareth F Jones, Nicola J Townsend, Monica F Craciun, Saverio Russo
Optoelectronic devices based on graphene and other two-dimensional (2D) materials, such as transition metal dichalcogenides (TMDs), are the focus of wide research interest. They can be the key to improving bandwidths in telecommunications, capacity in data storage, and new features in consumer electronics, safety devices, and medical equipment. The characterization of these emerging atomically thin materials and devices strongly relies on a set of measurements involving both optical and electronic instrumentation ranging from scanning photocurrent mapping to Raman and photoluminescence (PL) spectroscopy...
May 2017: Review of Scientific Instruments
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