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https://www.readbyqxmd.com/read/28641225/investigation-of-dissociation-constants-for-individual-and-total-naphthenic-acids-species-using-ultra-performance-liquid-chromatography-ion-mobility-time-of-flight-mass-spectrometry-analysis
#1
Rongfu Huang, Pamela Chelme-Ayala, Yanyan Zhang, Mohamed Changalov, Mohamed Gamal El-Din
Ultra-performance liquid chromatography ion mobility time-of-flight mass spectrometry (UPLC-IM-TOFMS) was utilized for the analysis of naphthenic acids (NAs) in fractions of pH-dependent sequential liquid-liquid extractions from oil sands process-affected water. Ion-mobility separation technique allowed the differentiation of OyS-NAs (2 ≤ y ≤ 4) from Ox-NAs (2 ≤ x ≤ 5) via drift time versus retention time separations. The results indicated that the addition of S atom to the O2-NA molecule led to a lower increase in the dissociation constant (pKa) compared to that caused by the addition of O atom...
June 18, 2017: Chemosphere
https://www.readbyqxmd.com/read/28641051/beneficial-role-of-citrus-fruit-polyphenols-against-hepatic-dysfunctions-a-review
#2
Md Mohabbulla Mohib, Kazi Afnan, Tasfiq Zaman Paran, Salma Khan, Juthika Sarker, Nahid Hasan, Istiaque Hasan, Md Abu Taher Sagor
Alcoholic liver diseases and virus-induced hepatic dysfunctions are prevalent in western countries. Evidence also suggests that hyperglycemia and insulin resistance are key players in the development of hepatic diseases and their complications. Since the comorbid diseases like obesity, diabetes and vascular dysfunctions primarily affect liver, the modern therapies against other hepatic dysfunctions are becoming a major challenge to treat. In addition to these, polypharmacy and adverse drug reactions (ADRs) are further aggravating the phenomenon...
June 22, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28640973/production-of-red-flowered-oilseed-rape-via-the-ectopic-expression-of-orychophragmus-violaceus-ovpap2
#3
Wenqin Fu, Daozong Chen, Qi Pan, Fengfeng Li, Zhigang Zhao, Xianhong Ge, Zaiyun Li
Oilseed rape (Brassica napus L.), which has yellow flowers, is both an important oil crop and a traditional tourism resource in China, whereas the Orychophragmus violaceus, which has purple flowers, likely possesses a candidate gene or genes to alter the flower color of oilseed rape. A previously established B. napus line has a particular pair of O. violaceus chromosomes (M4) and exhibits slightly red petals. In this study, the transcriptomic analysis of M4, B. napus (H3), and O. violaceus with purple petals (OvP) and with white petals (OvW) revealed that most anthocyanin biosynthesis genes were up-regulated in both M4 and OvP...
June 22, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28640913/temporal-patterns-of-deepwater-horizon-impacts-on-the-benthic-infauna-of-the-northern-gulf-of-mexico-continental-slope
#4
Michael G Reuscher, Jeffrey G Baguley, Nathan Conrad-Forrest, Cynthia Cooksey, Jeffrey L Hyland, Christopher Lewis, Paul A Montagna, Robert W Ricker, Melissa Rohal, Travis Washburn
The Deepwater Horizon oil spill occurred in spring and summer 2010 in the northern Gulf of Mexico. Research cruises in 2010 (approximately 2-3 months after the well had been capped), 2011, and 2014 were conducted to determine the initial and subsequent effects of the oil spill on deep-sea soft-bottom infauna. A total of 34 stations were sampled from two zones: 20 stations in the "impact" zone versus 14 stations in the "non-impact" zone. Chemical contaminants were significantly different between the two zones...
2017: PloS One
https://www.readbyqxmd.com/read/28640755/chemical-composition-and-biological-activities-of-leaf-and-fruit-essential-oils-from-eucalyptus-camaldulensis
#5
Gulden Dogan, Nazan Kara, Eyup Bagci, Seher Gur
The chemical composition of the essential oils from the leaves and fruit of Eucalyptus camaldulensis grown in Mersin, Turkey was analyzed using gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) techniques. The biological activities (antibacterial and antifungal) were examined using the agar well diffusion method. The main leaf oil constituents were p-cymene (42.1%), eucalyptol (1,8-cineole) (14.1%), α-pinene (12.7%) and α-terpinol (10.7%). The main constituents of the fruit oil were eucalyptol (1,8-cineole) (34...
June 22, 2017: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/28640614/role-of-polymeric-coating-on-the-phosphate-availability-as-fertilizer-insight-from-phosphate-release-in-soil-castor-polyurethane-coatings
#6
Diego Cruz, Ricardo Bortoletto-Santos, Gelton Guimarães, Wagner Luiz Polito, Caue Ribeiro
The coating of fertilizers with polymers is an acknowledged strategy for controlling the release of nutrients and their availability in soil. However, its effectiveness in the case of soluble phosphate fertilizers is still uncertain, and information is lacking concerning the chemical properties and structures of such coatings. Here, an oil-based hydrophobic polymer system (polyurethane) is proposed for control of the release of phosphorus from diammonium phosphate (DAP) granules. This material was systematically characterized, with evaluation of the delivery mechanism and the availability of phosphate in an acid soil...
June 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28636756/chemical-composition-and-allelopathic-antibacterial-antifungal-and-antiacetylcholinesterase-activity-of-fish-mint-houttuynia-cordata-thunb-from-india
#7
Ram S Verma, Neeta Joshi, Rajendra C Padalia, Ved R Singh, Prakash Goswami, Ajay Kumar, Hina Iqbal, Rajesh K Verma, Debabrata Chanda, Amit Chauhan, Dharmendra Saikia
Fish-mint (Houttuynia cordata Thunb.), belongs to family Saururaceae has long been used as food and traditional herbal medicine. The present study was framed to assess the changes occurring in the essential-oil composition of Houttuynia cordata during annual growth and to evaluate allelopathic, antibacterial, antifungal and antiacetylcholinesterase activities. The essential-oil content ranged from 0.06-0.14% and 0.08-0.16% in aerial-parts and underground-stem, respectively. The essential oils were analysed by GC-FID, GC-MS and NMR ((1) H & (13) C)...
June 21, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28636365/sustainable-elastomers-from-renewable-biomass
#8
Zhongkai Wang, Liang Yuan, Chuanbing Tang
Sustainable elastomers have undergone explosive growth in recent years, partly due to the resurgence of biobased materials prepared from renewable natural resources. However, mounting challenges still prevail: How can the chemical compositions and macromolecular architectures of sustainable polymers be controlled and broadened? How can their processability and recyclability be enabled? How can they compete with petroleum-based counterparts in both cost and performance? Molecular-biomass-derived polymers, such as polymyrcene, polymenthide, and poly(ε-decalactone), have been employed for constructing thermoplastic elastomers (TPEs)...
June 21, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28636253/estimation-of-vanadium-water-quality-benchmarks-for-the-protection-of-aquatic-life-with-relevance-to-the-athabasca-oil-sands-region-using-species-sensitivity-distributions
#9
Stephanie Schiffer, Karsten Liber
Elevated vanadium (V) concentrations in oil sands coke, which is produced and stored on the site of some major Athabasca Oil Sands companies, could pose a risk to aquatic ecosystems in northern Alberta, Canada, depending on its future storage and utilization. In the present study, V toxicity was determined in reconstituted Athabasca River water to various freshwater organisms, including 2 midge species (Chironomus dilutus and Chironomus riparius; 4-d and 30- to 40-d exposures) and 2 freshwater fish species (Oncorhynchus mykiss and Pimephales promelas; 4-d and 28-d exposures) to facilitate estimation of water quality benchmarks...
June 21, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28636160/species-specific-metabolism-of-naphthalene-and-phenanthrene-in-three-species-of-marine-teleosts-exposed-to-deepwater-horizon-crude-oil
#10
Erin L Pulster, Kevan Main, Dana Wetzel, Steve Murawski
The two most abundant polycyclic aromatic hydrocarbons (PAHs) measured in the Deepwater Horizon (DWH) crude oil, naphthalene and phenanthrene and their associated homologs, have both been shown to be acutely toxic in fish. Although fish have a relatively high metabolic capacity for PAHs, hydroxylated PAH (OH-PAHs) derivatives formed during the initial metabolic response can negatively impact the health of fish. Species-specific metabolism of naphthalene and phenanthrene was evaluated in three marine teleosts, red drum (Scianops ocellatus), Florida pompano (Trachinotus carolinus) and southern flounder (Paralichthys lethostigma)...
June 21, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28636046/lead-ii-soaps-crystal-structures-polymorphism-and-solid-and-liquid-mesophases
#11
F J Martínez-Casado, M Ramos-Riesco, J A Rodríguez-Cheda, M I Redondo-Yélamos, L Garrido, A Fernández-Martínez, J García-Barriocanal, I da Silva, M Durán-Olivencia, A Poulain
The long-chain members of the lead(ii) alkanoate series or soaps, from octanoate to octadecanoate, have been thoroughly characterized by means of XRD, PDF analysis, DSC, FTIR, ssNMR and other techniques, in all their phases and mesophases. The crystal structures at room temperature of all of the members of the series are now solved, showing the existence of two polymorphic forms in the room temperature crystal phase, different to short and long-chain members. Only nonanoate and decanoate present both forms, and this polymorphism is proven to be monotropic...
June 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28635651/effects-of-tetrodotoxin-in-mouse-models-of-visceral-pain
#12
Rafael González-Cano, Miguel Ángel Tejada, Antonia Artacho-Cordón, Francisco Rafael Nieto, José Manuel Entrena, John N Wood, Cruz Miguel Cendán
Visceral pain is very common and represents a major unmet clinical need for which current pharmacological treatments are often insufficient. Tetrodotoxin (TTX) is a potent neurotoxin that exerts analgesic actions in both humans and rodents under different somatic pain conditions, but its effect has been unexplored in visceral pain. Therefore, we tested the effects of systemic TTX in viscero-specific mouse models of chemical stimulation of the colon (intracolonic instillation of capsaicin and mustard oil) and intraperitoneal cyclophosphamide-induced cystitis...
June 21, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28635641/the-fate-of-pollutants-in-porous-asphalt-pavements-laboratory-experiments-to-investigate-their-potential-to-impact-environmental-health
#13
Susanne M Charlesworth, Jamie Beddow, Ernest O Nnadi
Pervious Paving Systems (PPS) are part of a sustainable approach to drainage in which excess surface water is encouraged to infiltrate through their structure, during which potentially toxic elements, such as metals and hydrocarbons are treated by biodegradation and physical entrapment and storage. However, it is not known where in the PPS structure these contaminants accumulate, which has implications for environmental health, particularly during maintenance, as well as consequences for the recycling of material from the PPS at the end-of-life...
June 21, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28635610/chemical-components-antioxidant-potential-and-hepatoprotective-effects-of-artemisia-campestris-essential-oil-against-deltamethrin-induced-genotoxicity-and-oxidative-damage-in-rats
#14
Mongi Saoudi, Marwa Ncir, Manel Ben Ali, Malek Grati, Kamel Jamoussi, Noureddine Allouche, Abdelfattah El Feki
In the present study, we evaluated the antioxidant potential of Artemisia campestris essential oil (ACEO) and the possible protective effects against deltamethrin induced hepatic toxic effects. The ACEO showed radical scavenging activity with IC50 = 47.66 ± 2.51 µg/ml, ferric reducing antioxidant power (FRAP) potential (EC50 = 5.36 ± 0.77 µg/ml), superoxide scavenging activity (IC50 = 0.175 ± 0.007 µg/ml) and ˙OH scavenging activity (IC50 = 0.034 ± 0.007 µg/ml). The obtained results of phenolic profile demonstrated that phenolic compounds are the major contributor to the antioxidant activity of ACEO...
July 2017: General Physiology and Biophysics
https://www.readbyqxmd.com/read/28635579/-fish-oil-in-pregnancy-can-it-prevent-asthma-in-children
#15
P L P Brand, M B Katan
Taking fish oil supplements in the third trimester of pregnancy was associated with significantly less wheezing or asthma in the child at the age of 3-5 years, according to a randomized clinical trial by Bisgaard et al., NEJM 2017. However, the results of this study should be interpreted with caution. The primary end points were modified at a late stage in the study, and two primary end points, eczema in the first 3 years of life and allergic sensitization at 18 months of age, were demoted to secondary end points, and showed no significant effect of treatment...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28635552/temporal-variation-of-fine-and-coarse-particulate-matter-sources-in-jeddah-saudi-arabia
#16
Chris C Lim, George D Thurston, Magdy Shamy, Mansour Alghamdi, Mamdouh Khoder, Abdullah M Mohorjy, Abdulrahman K Alkhalaf, Jason Brocato, Lung Chi Chen, Max Costa
This study provides the first comprehensive analysis of the seasonal variations and weekday/weekend differences in fine (PM2.5) and coarse (PM2.5-10) particulate matter mass concentrations, elemental constituents, and potential source origins in Jeddah, Saudi Arabia. Air quality samples were collected over one year, from June 2011 to May 2012 at a frequency of three times per week, and analyzed. The average mass concentrations of PM2.5 (21.9 μg/m(3)) and PM10 (107.8 μg/m(3)) during the sampling period exceeded the recommended annual average levels by the World Health Organization (WHO) for PM2...
June 21, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28635512/effect-of-simvastatin-on-lipid-accumulation-and-the-expression-of-cxcl16-and-nephrin-in-podocyte-induced-by-oxidized-ldl
#17
Li Wang, Xiujun Yao, Qian Li, Shuzhen Sun
OBJECTIVE: To investigate the effect of simvastatin on lipid accumulation and the expression of CXCL16 and Nephrin in murine podocytes induced by oxidized LDL (OxLDL) in order to explore the mechanism of protection. METHODS: Murine podocytes (MPC5) were incubated with OxLDL (80 μg/ml) at different concentrations of simvastatin (0, 1.0, and 2.0 μg/ml) for 48 hours. Oil red O staining was used for the assessment of lipid accumulation in podocytes, and colorimetric cholesterol detection kit was used for the quantitative measurement...
February 10, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28635414/core-shell-pla-pva-porous-microparticles-as-carriers-for-bacteriocin-nisin
#18
Pavlina Holcapkova, Martina Hrabalikova, Petra Stoplova, Vladimir Sedlarik
This work is focused on preparation of novel porous type of core-shell-structured microparticles based on polylactide (shell) and poly(vinyl alcohol) cross-linked with glutaric acid (GA) (core) prepared by water-in-oil-in-water solvent evaporation technique. The microparticle systems were used as delivery systems for immobilisation of model antibacterial agent - nisin. The effect of cross-linking and the initial amount of nisin on their morphology was investigated using scanning electron microscopy, BET analysis, zeta potential measurement and Fourier transform infra-red spectroscopy...
June 21, 2017: Journal of Microencapsulation
https://www.readbyqxmd.com/read/28634886/subcortical-brain-atrophy-in-gulf-war-illness
#19
Peka Christova, Lisa M James, Brian E Engdahl, Scott M Lewis, Adam F Carpenter, Apostolos P Georgopoulos
Gulf War Illness (GWI) is a multisystem disorder that has affected a substantial number of veterans who served in the 1990-1991 Gulf War. The brain is prominently affected, as manifested by the presence of neurological, cognitive and mood symptoms. Although brain dysfunction in GWI has been well documented (EBioMedicine 12:127-32, 2016), abnormalities in brain structure have been debated. Here we report a substantial (~10%) subcortical brain atrophy in GWI comprising mainly the brainstem, cerebellum and thalamus, and, to a lesser extent, basal ganglia, amygdala and diencephalon...
June 20, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28634803/a-method-for-reducing-environmental-pollution-by-using-essential-oils-in-rodent-pest-management-program
#20
Goran Jokić, Tanja Blažić, Rada Đurović-Pejčev, Tijana Đorđević, Suzana Đedović, Marina Vukša
Strong-smelling plant extracts, such as essential oils, have a variety of feeding effects on mammals. Considering current concerns over long-term health issues and environmental effects of chemicals, plant-based products with repellent or antifungal activities may represent good solutions for improvement of rodent pest control programs. The present study was therefore focused on examining the effects of bergamot, lavender, and thyme essential oils as additional bait components on daily intakes of cereal-based baits by wild house mice...
June 21, 2017: Environmental Science and Pollution Research International
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