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https://www.readbyqxmd.com/read/28330114/evaluation-of-orange-peel-for-biosurfactant-production-by-bacillus-licheniformis-and-their-ability-to-degrade-naphthalene-and-crude-oil
#1
Arthala Praveen Kumar, Avilala Janardhan, Buddolla Viswanath, Kallubai Monika, Jin-Young Jung, Golla Narasimha
A Gram-positive bacterium was isolated from mangrove soil and was identified as Bacillus licheniformis (KC710973). The potential of a mangrove microorganism to utilize different natural waste carbon substrates for biosurfactant production and biodegradation of hydrocarbons was evaluated. Among several substrates used in the present study, orange peel was found to be best substrate of biosurfactant yield with 1.796 g/L and emulsification activity of 75.17 % against diesel. Fourier transform infrared spectroscopy analysis of biosurfactant compound revealed that the isolated biosurfactant is in lipopeptide nature...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28328019/dopant-assisted-direct-analysis-in-real-time-mass-spectrometry-with-argon-gas
#2
Robert B Cody, A John Dane
RATIONALE: Dopants used with Atmospheric Pressure Photoionization (APPI) were examined with the Direct Analysis in Real Time (DART(®) ) ion source operated with argon gas. Charge-exchange and proton transfer reactions were observed by adding toluene, anisole, chlorobenzene and acetone to the DART gas stream, complementing the information obtained by helium DART. METHODS: Mass spectra were acquired with a time-of-flight mass spectrometer equipped with a DART ion source operated with argon gas...
May 30, 2016: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28322628/a-critical-review-of-the-relationship-between-occupational-exposure-to-diesel-emissions-and-lung-cancer-risk
#3
Matthias Möhner, Andrea Wendt
In 2012, a working group of the International Agency for Research on Cancer classified diesel exhaust (DE) as a human carcinogen (Group 1). This decision was primarily based on the findings of the Diesel Exhaust in Miners Study (DEMS). The disparity between the results of various methodological approaches applied to the DEMS led to several critical commentaries. An expert panel was subsequently set up by the Health Effects Institute to evaluate the DEMS results, together with a large study in the trucking industry...
March 2017: Critical Reviews in Toxicology
https://www.readbyqxmd.com/read/28319172/correction-identification-of-potential-novel-biomarkers-and-signaling-pathways-related-to-otitis-media-induced-by-diesel-exhaust-particles-using-transcriptomic-analysis-in-an-in-vivo-system
#4
Hyo Jeong Kim, So Young Kim, Jee Young Kwon, Yeo Jin Kim, Seung Hun Kang, Won-Hee Jang, Jun Ho Lee, Myung-Whan Suh, Jae-Jun Song, Young Rok Seo, Moo Kyun Park
[This corrects the article DOI: 10.1371/journal.pone.0166044.].
2017: PloS One
https://www.readbyqxmd.com/read/28318826/modelling-pollutant-emissions-in-diesel-engines-influence-of-biofuel-on-pollutant-formation
#5
Zvonimir Petranović, Tibor Bešenić, Milan Vujanović, Neven Duić
In order to reduce the harmful effect on the environment, European Union allowed using the biofuel blends as fuel for the internal combustion engines. Experimental studies have been carried on, dealing with the biodiesel influence on the emission concentrations, showing inconclusive results. In this paper numerical model for pollutant prediction in internal combustion engines is presented. It describes the processes leading towards the pollutant emissions, such as spray particles model, fuel disintegration and evaporation model, combustion and the chemical model for pollutant formation...
March 16, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28318790/wood-burning-pollution-in-southern-chile-pm2-5-source-apportionment-using-cmb-and-molecular-markers
#6
Ana M Villalobos, Francisco Barraza, Héctor Jorquera, James J Schauer
Temuco is a mid-size city representative of severe wood smoke pollution in southern Chile; i.e., ambient 24-h PM2.5 concentrations have exceeded 150 μg/m(3) in the winter season and the top concentration reached 372 μg/m(3) in 2010. Annual mean concentrations have decreased but are still above 30 μg/m(3). For the very first time, a molecular marker source apportionment of ambient organic carbon (OC) and PM2.5 was conducted in Temuco. Primary resolved sources for PM2.5 were wood smoke (37.5%), coal combustion (4...
March 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28315692/role-of-epithelial-mesenchymal-transition-emt-and-fibroblast-function-in-cerium-oxide-nanoparticles-induced-lung-fibrosis
#7
Jane Ma, Bridget Bishoff, R R Mercer, Mark Barger, Diane Schwegler-Berry, Vincent Castranova
The emission of cerium oxide nanoparticles (CeO2) from diesel engines, using cerium compounds as a catalyst to lower the diesel exhaust particles, is a health concern. We have previously shown that CeO2 induced pulmonary inflammation and lung fibrosis. The objective of the present study was to investigate the modification of fibroblast function and the role of epithelial-mesenchymal transition (EMT) in CeO2-induced fibrosis. Male Sprague-Dawley rats were exposed to CeO2 (0.15 to 7mg/kg) by a single intratracheal instillation and sacrificed at various times post-exposure...
March 15, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28315615/mir155-regulation-of-ubiquilin1-and-ubiquilin2-implications-in-cellular-protection-and-tumorigenesis
#8
Sanjay Yadav, Nishant Singh, Parag P Shah, David A Rowbotham, Danial Malik, Ankita Srivastav, Jai Shankar, Wan L Lam, William W Lockwood, Levi J Beverly
Ubiquilin (UBQLN) proteins are adaptors thought to link ubiquitinated proteins to the proteasome. However, our lab has recently reported a previously unappreciated role for loss of UBQLN in lung cancer progression. In fact, UBQLN genes are lost in over 50% of lung cancer samples examined. However, a reason for the loss of UBQLN has not been proposed, nor has a selective pressure that could lead to deletion of UBQLN been reported. Diesel Exhaust Particles (DEP) are a major concern in the large cities of developing nations and DEP exposed populations are at an increased risk of developing a number of illnesses, including lung cancer...
March 15, 2017: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/28304344/nrf2-regulates-the-risk-of-a-diesel-exhaust-inhalation-induced-immune-response-during-bleomycin-lung-injury-and-fibrosis-in-mice
#9
Ying-Ji Li, Takako Shimizu, Yusuke Shinkai, Yukiyo Hirata, Hirofumi Inagaki, Ken Takeda, Arata Azuma, Masayuki Yamamoto, Tomoyuki Kawada
The present study investigated the effects of diesel exhaust (DE) on an experimental model of bleomycin (BLM)-induced lung injury and fibrosis in mice. BLM was intravenously administered to both Nrf2(+/+) and Nrf2(-/-) C57BL/6J mice on day 0. The mice were exposed to DE for 56 days from 28 days before the BLM injection to 28 days after the BLM injection. Inhalation of DE induced significant inhibition of airway clearance function and the proinflammatory cytokine secretion in macrophages, an increase in neutrophils, and severe lung inflammatory injury, which were greater in Nrf2(-/-) mice than in Nrf2(+/+) mice...
March 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28302775/draft-genome-sequence-of-bacillus-licheniformis-vsd4-a-diesel-fuel-degrading-and-plant-growth-promoting-phyllospheric-bacterium
#10
Vincent Stevens, Sofie Thijs, Breanne McAmmond, Tori Langill, Jonathan Van Hamme, Nele Weyens, Jaco Vangronsveld
We report here the 4.19-Mb draft genome sequence of Bacillus licheniformis VSD4, a Gram-positive bacterium of the Bacillaceae family, isolated from leaves of Hedera helix growing at a high-traffic city center in Belgium. Knowledge about its genome will help to evaluate its potential as an inoculant in phylloremediation applications.
March 16, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28295202/in-situ-esterification-and-extractive-fermentation-for-butyl-butyrate-production-with-clostridium-tyrobutyricum
#11
Zhong-Tian Zhang, Steven Taylor, Yi Wang
Butyl butyrate (BB) is a valuable chemical that can be used as flavor, fragrance, extractant, etc. in various industries. Meanwhile, BB can also be used as a fuel source with excellent compatibility as gasoline, aviation kerosene and diesel components. The conventional industrial production of BB is highly energy-consuming and generates various environmental pollutants. Recently, there have been tremendous interests in producing BB from renewable resources through biological routes. In this study, based on the fermentation using the hyper-butyrate producing strain Clostridium tyrobutyricum ATCC 25755, efficient BB production through in situ esterification was achieved by supplementation of lipase and butanol into the fermentation...
March 15, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28295166/engineering-oxidative-stress-defense-pathways-to-build-a-robust-lipid-production-platform-in-yarrowia-lipolytica
#12
Peng Xu, Kangjian Qiao, Gregory Stephanopoulos
Microbially-derived lipids have recently attracted renewed interests due to their broad applications in production of green diesels, cosmetic additives and oleochemicals. Metabolic engineering efforts have targeted a large portfolio of biosynthetic pathways to efficiently convert sugar to lipids in oleaginous yeast. In the engineered overproducing strains, endogenous cell metabolism typically generates harmful electrophilic molecules that compromise cell fitness and productivity. Lipids, particularly unsaturated fatty acids, are highly susceptible to oxygen radical attack and the resulting oxidative species are detrimental to cell metabolism and limit lipid productivity...
March 14, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28293828/pm2-5-emissions-from-different-types-of-heavy-duty-truck-a-case-study-and-meta-analysis-of-the-beijing-tianjin-hebei-region
#13
Liying Song, Hongqing Song, Jingyi Lin, Cheng Wang, Mingxu Yu, Xiaoxia Huang, Yu Guan, Xing Wang, Li Du
Beijing-Tianjin-Hebei (BTH) region in China is affected seriously by the hazy weather that has a large impact on human health. PM2.5 is one of the most important reasons for hazy weather. Understanding the PM2.5 emission characteristics from different types of heavy-duty trucks (HDTs) is valuable in policies and regulations to improve urban air quality and mitigate vehicle emission in China. The investigation and analysis on HDT population and PM2.5 emission in BTH region are carried out. The results show that the population and PM2...
March 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28290679/repeat-fuel-specific-emission-measurements-on-two-california-heavy-duty-truck-fleets
#14
Molly J Haugen, Gary A Bishop
The University of Denver repeated its 2013 fuel specific gaseous and particle emission measurements on two California heavy-duty vehicle fleets. In 2015 1456 measurements at the Port of Los Angeles and 694 measurements at the Cottonwood weigh station in northern California were collected. The Port fleet changed little since 2013, increasing the average age (+1.8 years), accompanied by an increase in particle mass (PM) by +266% (0.03 ± 0.01 to 0.11 ± 0.01 gPM/kg of fuel) and black carbon (BC) by +300% (0.02 ± 0...
March 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28286432/decreased-uptake-and-enhanced-mitochondrial-protection-underlie-reduced-toxicity-of-nanoceria-in-human-monocyte-derived-macrophages
#15
Salik Hussain, Preeti P Kodavanti, Jamie D Marshburn, Agnes Janoshazi, Stella M Marinakos, Margaret George, Annette Rice, Mark R Wiesner, Stavros Garantziotis
Cerium dioxide nanoparticles (nanoceria), currently used as catalysts including additives to diesel fuel, also present potential as a novel therapeutic agent for disorders involving oxidative stress. However, little is known about the effects of nanoceria on primary human cells involved in the innate immune response. Here, we evaluate nanoceria effects on monocyte derived macrophages (MDMs) from healthy human subjects. Peripheral blood monocytes were isolated from healthy human volunteers. MDMs were obtained by maturing monocytes over a five-day period...
December 2016: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/28284157/calibration-sets-selection-strategy-for-the-construction-of-robust-pls-models-for-prediction-of-biodiesel-diesel-blends-physico-chemical-properties-using-nir-spectroscopy
#16
Anna Palou, Aira Miró, Marcelo Blanco, Rafael Larraz, José Francisco Gómez, Teresa Martínez, Josep Maria González, Manel Alcalà
Even when the feasibility of using near infrared (NIR) spectroscopy combined with partial least squares (PLS) regression for prediction of physico-chemical properties of biodiesel/diesel blends has been widely demonstrated, inclusion in the calibration sets of the whole variability of diesel samples from diverse production origins still remains as an important challenge when constructing the models. This work presents a useful strategy for the systematic selection of calibration sets of samples of biodiesel/diesel blends from diverse origins, based on a binary code, principal components analysis (PCA) and the Kennard-Stones algorithm...
March 3, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28278037/revisiting-nitrous-acid-hono-emission-from-on-road-vehicles-a-tunnel-study-with-a-mixed-fleet
#17
Yutong Liang, Qiaozhi Zha, Weihao Wang, Long Cui, Ka Hei Lui, Kin Fai Ho, Zhe Wang, Shun-Cheng Lee, Tao Wang
Nitrous acid (HONO) is an important precursor of OH radicals in the atmosphere. In urban areas, emissions from vehicles are the main source of air pollutants including reactive nitrogen. Previously reported emission ratios of HONO (HONO/NOx) from vehicles were measured in the late 1990s which needs to be updated due to the significant changes in emission control technologies. We measured the emission ratio of a fleet of vehicles (38% diesel on average) from 11 to 21 March, 2015 in a road tunnel in Hong Kong...
February 21, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28278030/carbon-nanotube-like-materials-in-the-exhaust-from-a-diesel-engine-using-gas-oil-ethanol-mixing-fuel-with-catalysts-and-sulphur
#18
Shunsuke Suzuki, Shinsuke Mori
Particle matters from a diesel engine including soot and carbon nanomaterials were collected on a sampling holder and their structure was studied by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). As a result of employing gas oil/ethanol mixing fuel with sulphur and ferrocene/molybdenum as catalyst sources, formation of carbon nanotubes (CNT)-like materials in addition to soot was observed in the exhaust gas from a diesel engine. It was revealed that CNT-like materials were included among soot in our system only when following three conditions were satisfied simultaneously; high ethanol fraction in fuel, high sulphur loading and presence of catalyst sources in fuel...
February 28, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28272809/bioprospection-of-cold-adapted-yeasts-with-biotechnological-potential-from-antarctica
#19
María Martha Martorell, Lucas Adolfo Mauro Ruberto, Pablo Marcelo Fernández, Lucía Inés Castellanos de Figueroa, Walter Patricio Mac Cormack
The aim of this study was to investigate the ability to produce extracellular hydrolytic enzymes at low temperature of yeasts isolated from 25 de Mayo island, Antarctica, and to identify those exhibiting one or more of the evaluated enzymatic activities. A total of 105 yeast isolates were obtained from different samples and 66 were identified. They belonged to 12 basidiomycetous and four ascomycetous genera. Most of the isolates were ascribed to the genera Cryptococcus, Mrakia, Cystobasidium, Rhodotorula, Gueomyces, Phenoliferia, Leucosporidium, and Pichia...
March 8, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28264691/endothelial-responses-of-the-alveolar-barrier-in-vitro-in-a-dose-controlled-exposure-to-diesel-exhaust-particulate-matter
#20
Sebastian G Klein, Sébastien Cambier, Jennifer Hennen, Sylvain Legay, Tommaso Serchi, Inge Nelissen, Aline Chary, Elisa Moschini, Andreas Krein, Brunhilde Blömeke, Arno C Gutleb
BACKGROUND: During the last 250 years, the level of exposure to combustion-derived particles raised dramatically in western countries, leading to increased particle loads in the ambient air. Among the environmental particles, diesel exhaust particulate matter (DEPM) plays a special role because of its omnipresence and reported effects on human health. During recent years, a possible link between air pollution and the progression of atherosclerosis is recognized. A central effect of DEPM is their impact on the endothelium, especially of the alveolar barrier...
March 6, 2017: Particle and Fibre Toxicology
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