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https://www.readbyqxmd.com/read/28343358/expression-of-the-cyanobacterial-enzyme-cyanase-increases-cyanate-metabolism-and-cyanate-tolerance-in-arabidopsis
#1
Rashad Kebeish, Omar Al-Zoubi
Cyanate and its derivatives are considered as environmental hazardous materials. Cyanate is released to the environment through many chemical industries and mining wastewater. Cyanase enzyme converts cyanate into CO2 and NH3 in a bicarbonate-dependent reaction. At low cyanate concentrations, the endogenous plant cyanases play a vital role in cyanate detoxification. However, such cyanate biodegradation system is probably insufficient due to the excess cyanate concentrations at contaminated sites. In this study, we have transferred the activity of the cyanobacterial cyanase into Arabidopsis thaliana plants in order to enhance plant resistance against cyanate toxicity...
March 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28342964/establishing-a-novel-biosynthetic-pathway-for-the-production-of-3-4-dihydroxybutyric-acid-from-xylose-in-escherichia-coli
#2
Jia Wang, Xiaolin Shen, Rachit Jain, Jian Wang, Qipeng Yuan, Yajun Yan
3-Hydroxy-γ-butyrolactone (3HBL) is an attractive building block owing to its broad applications in pharmaceutical industry. Currently, 3HBL is commercially produced by chemical routes using petro-derived carbohydrates, which involves hazardous materials and harsh processing conditions. Only one biosynthetic pathway has been reported for synthesis of 3HBL and its hydrolyzed form 3,4-dihydroxybutyric acid (3,4-DHBA) using glucose and glycolic acid as the substrates and coenzyme A as the activator, which involves multiple steps (>10 steps) and suffers from low productivity and yield...
March 23, 2017: Metabolic Engineering
https://www.readbyqxmd.com/read/28340384/effects-of-waste-eggshells-and-sic-addition-on-specific-strength-and-thermal-expansion-of-hybrid-green-metal-matrix-composite
#3
Satpal Sharma, Shashi Prakash Dwivedi
Chicken eggshell waste is an industrial byproduct, and its disposal constitutes a serious environmental hazard. Chicken eggshell can be used in commercial products to produce new materials with low cost and density. Low density material which can sustain at higher temperature is a remarkable area of research. Keeping these facts in the mind, the present investigation aims to study the physical behaviour, specific strength and thermal expansion of AA2014/SiC/carbonized eggshell hybrid green metal matrix composites...
March 18, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28339329/morbidity-and-mortality-associated-with-meningioma-after-cranial-radiotherapy-a-report-from-the-childhood-cancer-survivor-study
#4
Daniel C Bowers, Chaya S Moskowitz, Joanne F Chou, Claire M Mazewski, Joseph P Neglia, Gregory T Armstrong, Wendy M Leisenring, Leslie L Robison, Kevin C Oeffinger
Purpose Little is known about neurologic morbidity attributable to cranial radiotherapy (CRT) -associated meningiomas. Materials and Methods From 4,221 survivors exposed to CRT in the Childhood Cancer Survivor Study, a diagnosis of meningioma and onset of neurologic sequelae were ascertained. Cox proportional hazards regression was used to estimate hazard ratios (HR) and 95% CIs to evaluate the factors associated with neurologic sequelae after subsequent meningioma. Results One hundred ninety-nine meningiomas were identified among 169 participants...
March 24, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28338853/radiological-impacts-assessment-for-workers-in-ceramic-industry-in-serbia
#5
Nataša Todorovic, Dušan Mrda, Jan Hansman, Slavko Todorovic, Jovana Nikolov, Miodrag Krmar
Studies have been carried out to determine the natural radioactivity in some materials used in ceramic industry (zircon, zirkosil, Zircobit MO/S, zircon silicate, zirklonil frit, hematite, bentonite, wollastonite, raw kaolin, kaolinized granite, sileks ball, feldspar, pigment, white base serigraphic, engobe) and their associated radiation hazard. The external hazard index, Hex, values, radium equivalent activity, Raeq, total absorbed dose rates, D and annual effective dose, De were derived for all measured materials and compared with the recommended values to assess the external radiation hazards to workers who worked in ceramic industries in Serbia...
March 3, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28335453/a-spatially-offset-raman-spectroscopy-method-for-non-destructive-detection-of-gelatin-encapsulated-powders
#6
Kuanglin Chao, Sagar Dhakal, Jianwei Qin, Yankun Peng, Walter F Schmidt, Moon S Kim, Diane E Chan
Non-destructive subsurface detection of encapsulated, coated, or seal-packaged foods and pharmaceuticals can help prevent distribution and consumption of counterfeit or hazardous products. This study used a Spatially Offset Raman Spectroscopy (SORS) method to detect and identify urea, ibuprofen, and acetaminophen powders contained within one or more (up to eight) layers of gelatin capsules to demonstrate subsurface chemical detection and identification. A 785-nm point-scan Raman spectroscopy system was used to acquire spatially offset Raman spectra for an offset range of 0 to 10 mm from the surfaces of 24 encapsulated samples, using a step size of 0...
March 18, 2017: Sensors
https://www.readbyqxmd.com/read/28335450/assessment-of-radioactive-materials-and-heavy-metals-in-the-surface-soil-around-the-bayanwula-prospective-uranium-mining-area-in-china
#7
Haribala Bai, Bitao Hu, Chengguo Wang, Shanhu Bao, Gerilemandahu Sai, Xiao Xu, Shuai Zhang, Yuhong Li
The present work is the first systematic and large scale study on radioactive materials and heavy metals in surface soil around the Bayanwula prospective uranium mining area in China. In this work, both natural and anthropogenic radionuclides and heavy metals in 48 surface soil samples were analyzed using High Purity Germanium (HPGe) γ spectrometry and inductively coupled plasma-mass spectrometry (ICP-MS). The obtained mean activity concentrations of (238)U, (226)Ra, (232)Th, (40)K, and (137)Cs were 25.81 ± 9...
March 14, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28335309/separation-of-bacteria-protozoa-and-carbon-nanotubes-by-density-gradient-centrifugation
#8
Monika Mortimer, Elijah J Petersen, Bruce A Buchholz, Patricia A Holden
Sustainable production and use of carbon nanotube (CNT)-enabled materials require efficient assessment of CNT environmental hazards, including the potential for CNT bioaccumulation and biomagnification in environmental receptors. Microbes, as abundant organisms responsible for nutrient cycling in soil and water, are important ecological receptors for studying the effects of CNTs. Quantification of CNT association with microbial cells requires efficient separation of CNT-associated cells from individually dispersed CNTs and CNT agglomerates...
October 12, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28325702/construction-of-an-interim-storage-field-using-recovered-municipal-solid-waste-incineration-bottom-ash-field-performance-study
#9
Laura Annika Sormunen, Pauli Kolisoja
The leaching of hazardous substances from municipal solid waste incineration (MSWI) bottom ash (BA) has been studied in many different scales for several years. Less attention has been given to the mechanical performance of MSWI BA in actual civil engineering structures. The durability of structures built with this waste derived material can have major influence on the functional properties of such structures and also the potential leaching of hazardous substances in the long term. Hence, it is necessary to properly evaluate in which type of structures MSWI BA can be safely used in a similar way as natural and crushed rock aggregates...
March 18, 2017: Waste Management
https://www.readbyqxmd.com/read/28324711/fire-hazard-reduction-of-hollow-glass-microspheres-in-thermoplastic-polyurethane-composites
#10
Chuanmei Jiao, Hongzhi Wang, Shaoxiang Li, Xilei Chen
Nowadays, reducing the fire hazard of thermoplastic polyurethane (TPU) is an important research direction in the fields of fire safety materials. In this article, hollow glass microsphere (HGM) was used to reduce the fire hazard of TPU in combustion process. The fire characteristics including smoke and heat production of TPU composites were evaluated using smoke density test (SDT) and cone calorimeter test (CCT). And the thermal decomposition and flammable properties were further studied using thermogravimetric analysis/infrared spectrometry (TG-IR) and limiting oxygen index (LOI), etc...
February 24, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28318785/biodegradation-of-polyester-polyurethane-by-aspergillus-tubingensis
#11
Sehroon Khan, Sadia Nadir, Zia Ullah Shah, Aamer Ali Shah, Samantha C Karunarathna, Jianchu Xu, Afsar Khan, Shahzad Munir, Fariha Hasan
The xenobiotic nature and lack of degradability of polymeric materials has resulted in vast levels of environmental pollution and numerous health hazards. Different strategies have been developed and still more research is being in progress to reduce the impact of these polymeric materials. This work aimed to isolate and characterize polyester polyurethane (PU) degrading fungi from the soil of a general city waste disposal site in Islamabad, Pakistan. A novel PU degrading fungus was isolated from soil and identified as Aspergillus tubingensis on the basis of colony morphology, macro- and micro-morphology, molecular and phylogenetic analyses...
March 15, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28315569/algorithm-for-predicting-chd-death-risk-in-turkish-adults-conventional-factors-contribute-only-moderately-in-women
#12
Altan Onat, Günay Can, Ayşem Kaya, Muhammed Keskin, Mert I Hayıroğlu, Hüsniye Yüksel
OBJECTIVE: To assist the management strategy of individuals, we determined an algorithm for predicting the risk of coronary heart disease (CHD) death in Turkish adults with a high prevalence of metabolic syndrome (MetS). METHODS: The risk of CHD death was estimated in 3054 middle-aged adults, followed over 9.08±4.2 years. Cox proportional hazard regression was used to predict risk. Discrimination was assessed using C-statistics. RESULTS: CHD death was identified in 233 subjects...
March 9, 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28314361/hepatotoxicity-and-drug-chemical-interaction-toxicity-of-nanoclay-particles-in-mice
#13
Katsuhiro Isoda, Ryutaro Nagata, Tomoya Hasegawa, Yuichiro Taira, Ikuko Taira, Yoshimi Shimizu, Kazuo Isama, Tetsuji Nishimura, Isao Ishida
Nanomaterials are relatively new and unconventional materials with many useful properties, but their effects on biological systems are poorly understood. Nanoclay is a general term for layered mineral silicate nanoparticles that are ideally suited for use in clay-based nanocomposites. The potential biological hazards of nanoclays have not been addressed, however. Therefore, we investigated the in vivo effects and drug interactions of nanoclays. In mice, administration of nanoclay particles via the tail vein led to acute liver injury...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28302524/inactivation-of-bacterial-pathogenic-load-in-compost-against-vermicompost-of-organic-solid-waste-aiming-to-achieve-sanitation-goals-a-review
#14
REVIEW
Nuhaa Soobhany, Romeela Mohee, Vinod Kumar Garg
Waste management strategies for organic residues, such as composting and vermicomposting, have been implemented in some developed and developing countries to solve the problem of organic solid waste (OSW). Yet, these biological treatment technologies do not always result in good quality compost or vermicompost with regards to sanitation capacity owing to the presence of bacterial pathogenic substances in objectionable concentrations. The presence of pathogens in soil conditioners poses a potential health hazard and their occurrence is of particular significance in composts and/or vermicomposts produced from organic materials...
March 13, 2017: Waste Management
https://www.readbyqxmd.com/read/28301309/value-of-dynamic-contrast-enhanced-and-diffusion-weighted-mr-imaging-in-the-detection-of-pathologic-complete-response-in-cervical-cancer-after-neoadjuvant-therapy-a-retrospective-observational-study
#15
Aurélie Jalaguier-Coudray, Rim Villard-Mahjoub, Aurélie Delouche, Béatrice Delarbre, Eric Lambaudie, Gilles Houvenaeghel, Mathieu Minsat, Agnès Tallet, Renaud Sabatier, Isabelle Thomassin-Naggara
Purpose To evaluate the association between dynamic contrast material-enhanced (DCE) and diffusion-weighted (DW) magnetic resonance (MR) imaging with pathologic complete response after preoperative combined chemotherapy and radiation therapy for cervical carcinoma and evaluate the risk of local recurrence. Materials and Methods The institutional ethics committee approved the study and waived the requirement to obtain informed consent. The study comprised 52 patients with locally advanced carcinoma, treated first with combined chemotherapy and radiation therapy, who underwent MR imaging before final surgery between June 2011 and July 2015...
March 14, 2017: Radiology
https://www.readbyqxmd.com/read/28301264/cardiac-events-after-radiation-therapy-combined-analysis-of-prospective-multicenter-trials-for-locally-advanced-non-small-cell-lung-cancer
#16
Robert T Dess, Yilun Sun, Martha M Matuszak, Grace Sun, Payal D Soni, Latifa Bazzi, Venkatesh L Murthy, Jason W D Hearn, Feng-Ming Kong, Gregory P Kalemkerian, James A Hayman, Randall K Ten Haken, Theodore S Lawrence, Matthew J Schipper, Shruti Jolly
Purpose Radiation therapy is a critical component in the care of patients with non-small-cell lung cancer (NSCLC), yet cardiac injury after treatment is a significant concern. Therefore, we wished to elucidate the incidence of cardiac events and their relationship to radiation dose to the heart. Patients and Materials Study eligibility criteria included patients with stage II to III NSCLC treated on one of four prospective radiation therapy trials at two centers from 2004 to 2013. All cardiac events were reviewed and graded per Common Terminology Criteria for Adverse Events (v4...
March 16, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28296041/mitochondrial-oxidative-stress-and-dysfunction-induced-by-single-and-multi-wall-carbon-nanotubes-a-comparative-study
#17
Parvaneh Naserzadeh, Fatemeh Ghanbary, Enayatollah Seydi, Alireza Ghasemi, Mohammad Taghi Joghataei, Khadijeh Ashtari, Mohsen Akbari
With the ever-increasing use of carbon nanotubes (CNTs) in health-related and engineering applications, the hazardous risks of this material have become a major concern. It is well-known that CNTs accumulate with cytotoxic and genotoxic levels within vital organs. It has also been shown that treating cell cultures with CNTs resulted in cell cycle arrest and increased apoptosis/necrosis. The goal of this pilot study is to perform a comprehensive comparative study on the toxicity of single-wall (SW) and multi-wall (MW) carbon nanotubes in rat skin cells...
March 10, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28294555/promise-and-peril-in-nanomedicine-the-challenges-and-needs-for-integrated-systems-biology-approaches-to-define-health-risk
#18
REVIEW
Sabina Halappanavar, Ulla Vogel, Hakan Wallin, Carole L Yauk
In the 1966s visionary film 'Fantastic Voyage' a submarine crew was shrunk to 100 nm in size and injected into the body of an injured scientist to repair his damaged brain. The movie (written by Harry Kleiner; directed by Richard Fleischer; novel by Isaac Asimov) drew attention to the potential power of engineered nanoscale structures and devices to construct, monitor, control, treat, and repair individual cells. Even more interesting was the fact that the film elegantly noted that the structure had to be miniaturized to a size that is not detected by the body's immune surveillance system, and highlighted the many physiological barriers that are encountered on the submarine's long journey to the target...
March 15, 2017: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/28290930/medical-effects-of-a-transuranic-dirty-bomb
#19
Asaf Durakovic
The modern military battlefields are characterized by the use of nonconventional weapons such as encountered in the conflicts of the Gulf War I and Gulf War II. Recent warfare in Iraq, Afghanistan, and the Balkans has introduced radioactive weapons to the modern war zone scenarios. This presents the military medicine with a new area of radioactive warfare with the potential large scale contamination of military and civilian targets with the variety of radioactive isotopes further enhanced by the clandestine use of radioactive materials in the terrorist radioactive warfare...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28289977/location-function-and-ontogeny-of-pulmonary-macrophages-during-the-steady-state
#20
REVIEW
Natalio Garbi, Bart N Lambrecht
The lung is continuously exposed to potentially hazardous environmental challenges in the form of inert material and microbes. Pulmonary macrophages are critical in maintaining a low inflammatory context in the lung to facilitate optimal gas exchange. During infection, however, they mediate the immediate response to invading microorganisms in coordination with epithelial cells and other tissue-resident immune cells including dendritic cells, innate lymphocytes and memory T cells, and pulmonary interstitial macrophages...
March 13, 2017: Pflügers Archiv: European Journal of Physiology
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