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https://www.readbyqxmd.com/read/29332273/pollution-and-ecological-risk-assessment-of-nutrients-associated-with-deposited-sediments-collected-from-roof-and-road-surfaces
#1
Xiao Wu, Jianghua Yu, Hui Qiu, Hua Fang
Surface-deposited sediment in urban areas is an essential environmental medium for assessing nutrient contamination. The total nitrogen (TN) and total phosphorus (TP) pollution associated with surface-deposited sediments can be transported into urban water bodies by runoff and can cause eutrophication of those water bodies. By analyzing the samples collected on roof surfaces and road surfaces, this study provides a comparison of the differences in TN and TP pollution loading in sediments on these two different impervious surface materials...
January 13, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29331510/effects-of-sub-minimum-inhibitory-concentrations-of-lemon-essential-oil-on-the-acid-tolerance-and-biofilm-formation-of-streptococcus-mutans
#2
Yanwei Sun, Sijia Chen, Chen Zhang, Yali Liu, Li Ma, Xiangyu Zhang
OBJECTIVES: Lemon essential oil (LEO) is a kind of secondary metabolite from lemon peels and has been found to inhibit cariogenic bacteria for decades. However, its effects on main cariogenic virulence factors are rarely reported. The present study aimed to investigate the effects of sub-minimum inhibitory concentrations (sub-MICs) of LEO on the acid tolerance and biofilm formation of Streptococcus mutans (S. mutans) and preliminarily reveal the possible underlying mechanisms. DESIGNS: Effects of LEO on the acid tolerance and biofilm formation of S...
December 29, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29331302/bone-matrix-microdamage-and-vascular-changes-characterize-bone-marrow-lesions-in-the-subchondral-bone-of-knee-osteoarthritis
#3
Dzenita Muratovic, David M Findlay, Flavia M Cicuttini, Anita E Wluka, Yea-Rin Lee, Julia S Kuliwaba
INTRODUCTION: Bone marrow lesions (BMLs) in the subchondral bone in osteoarthritis (OA) are suggested to be multifactorial, although the pathogenic mechanisms are unknown. Bone metabolism and cardiovascular risk factors associate with BML in epidemiologic studies. However, there are no studies at the tissue level investigating the relationship between these processes and BML. The aim of this study was to investigate the relationship between BMLs in the tibial plateau (TP) of knee OA and bone matrix microdamage, osteocyte density and vascular changes...
January 10, 2018: Bone
https://www.readbyqxmd.com/read/29331219/polycyclic-aromatic-hydrocarbons-in-soils-and-lichen-from-the-western-tibetan-plateau-concentration-profiles-distribution-and-its-influencing-factors
#4
Ruichen Zhou, Ruiqiang Yang, Chuanyong Jing
The Tibetan Plateau (TP) is a huge area and rarely affected by human activity, and is regarded as one of the most remote regions on the earth. Many studies about the long-range atmospheric transport (LRAT) of semi-volatile organic compounds (SVOCs) were conducted in southern and central TP. However, there are very limited studies focused on PAHs in the western TP and the concentrations profiles, distribution and its controlling factors in this area remains unclear. Thus, to explore this knowledge gap, 37 surface soil samples and 23 lichen samples were collected and analyzed for PAHs...
January 10, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29329647/atractylodes-lancea-rhizome-water-extract-reduces-triptolide-induced-toxicity-and-enhances-anti-inflammatory-effects
#5
Yuan Wei, Dan-Juan Sui, Hai-Miao Xu, Zhen Ouyang, Na Wu, Du-Jun Wang, Xiao-Yan Zhang, Da-Wei Qian
The present study was designed to explore the influence of water extracts of Atractylodes lancea rhizomes on the toxicity and anti-inflammatory effects of triptolide (TP). A water extract was prepared from A. lancea rhizomes and co-administered with TP in C57BL/6 mice. The toxicity was assayed by determining serum biochemical parameters and visceral indexes and by liver histopathological analysis. The hepatic CYP3A expression levels were detected using Western blotting and RT-PCR methods. The data showed that the water extract of A...
December 2017: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/29327750/synthesis-and-reactivity-of-an-anionic-allenylidene-complex
#6
Anthony F Hill, Richard A Manzano
The reaction of [W([triple bond, length as m-dash]CC[triple bond, length as m-dash]CSiMe3)(CO)2(Tp*)] (Tp* = hydrotris(dimethylpyrazolyl)borate) with MeLi generates the first example of an anionic allenylidene complex Li[W([double bond, length as m-dash]C[double bond, length as m-dash]C[double bond, length as m-dash]CMeSiMe3)(CO)2(Tp*)] which reacts with electrophiles (H+, Me+) at the β-carbon to afford vinylcarbyne (allylidyne) complexes [W([triple bond, length as m-dash]CCE[double bond, length as m-dash]CMeSiMe3)(CO)2(Tp*)] (E = H, Me), and with bromine provides the unprecedented binuclear bis(carbyne) complex {C([double bond, length as m-dash]CMeSiMe3)C[triple bond, length as m-dash]W(CO)2(Tp*)}2via oxidative C-C coupling at the β-carbon...
January 12, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29327193/effect-of-vegetation-type-on-treatment-performance-and-bioelectric-production-of-constructed-wetland-modules-combined-with-microbial-fuel-cell-cw-mfc-treating-synthetic-wastewater
#7
Çağdaş Saz, Cengiz Türe, Onur Can Türker, Anıl Yakar
An operation of microcosm-constructed wetland modules combined with microbial fuel cell device (CW-MFC) was assessed for wastewater treatment and bioelectric generation. One of the crucial aims of the present experiment is also to determine effect of vegetation on wastewater treatment process and bioelectric production in wetland matrix with microbial fuel cell. Accordingly, CW-MFC modules with vegetation had higher treatment efficiency compared to unplanted wetland module, and average COD, NH4+, and TP removal efficiency in vegetated wetland modules were ranged from 85 to 88%, 95 to 97%, and 95 to 97%, respectively...
January 11, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29327177/influence-of-sampling-frequency-and-load-calculation-methods-on-quantification-of-annual-river-nutrient-and-suspended-solids-loads
#8
Ahmed Elwan, Ranvir Singh, Maree Patterson, Jon Roygard, Dave Horne, Brent Clothier, Geoffrey Jones
Better management of water quality in streams, rivers and lakes requires precise and accurate estimates of different contaminant loads. We assessed four sampling frequencies (2 days, weekly, fortnightly and monthly) and five load calculation methods (global mean (GM), rating curve (RC), ratio estimator (RE), flow-stratified (FS) and flow-weighted (FW)) to quantify loads of nitrate-nitrogen (NO3--N), soluble inorganic nitrogen (SIN), total nitrogen (TN), dissolved reactive phosphorus (DRP), total phosphorus (TP) and total suspended solids (TSS), in the Manawatu River, New Zealand...
January 11, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29324913/the-detection-of-endocarditis-post-implantation-grafts-arteritis-and-other-related-disorders-by-18f-fdg-pet-ct
#9
Jelena Šaponjski, Dragana Šobić-Šaranović, Strahinja Odalović, Milica Stojiljković, Jelena Pantović, Nebojša Petrović, Isidora Grozdić-Milojević, Vera Artiko
INTRODUCTION: Positron emission tomography with computed tomography (18F-FDG PET/CT) is a nuclear medicine diagnostic method which, unlike other technological modalities that asses anatomical features, detects increased glucose metabolism inside the cells, thus is very helpful in diagnosing cardiovascular infection and inflammation and also in therapy planning. AIM: Aim of this study was to assess the significance of 18F-FDG PET/CT in detection of an active disease in patients with infection and inflammation of cardiovascular system...
September 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29324837/health-economic-assessment-of-gd-eob-dtpa-mri-versus-eccm-mri-and-multi-detector-ct-for-diagnosis-of-hepatocellular-carcinoma-in-china
#10
Xiaoning He, Jing Wu, Anke-Peggy Holtorf, Harald Rinde, Shuangshuang Xie, Wen Shen, Jiancun Hou, Xuehua Li, Ziping Li, Jiaming Lai, Yuting Wang, Lin Zhang, Jian Wang, Xuesong Li, Kuansheng Ma, Feng Ye, Han Ouyang, Hong Zhao
Limited data exists in China on the comparative cost of gadolinium ethoxybenzyl diethylenetriamine magnetic resonance imaging (Gd-EOB-DTPA-MRI) with other imaging techniques. This study compared the total cost of Gd-EOB-DTPA-MRI with multidetector computed tomography (MDCT) and extracellular contrast media-enhanced MRI (ECCM-MRI) as initial imaging procedures in patients with suspected hepatocellular carcinoma (HCC). We developed a decision-tree model on the basis of the Chinese clinical guidelines for HCC, which was validated by clinical experts from China...
2018: PloS One
https://www.readbyqxmd.com/read/29324401/unblinded-randomized-multicenter-trial-comparing-lamotrigine-and-valproate-combination-with-controlled-release-carbamazepine-monotherapy-as-initial-drug-regimen-in-untreated-epilepsy
#11
Byung In Lee, Soon Kee No, Sang-Doe Yi, Hyang Woon Lee, Ok Joon Kim, Sang Ho Kim, Myeong Kyu Kim, Sung Eun Kim, Yo Sik Kim, Jae Moon Kim, Se-Jin Lee, Dong Jin Shin, Sung Pa Park, Yeong In Kim, Kyoung Heo, Yong Won Cho, Yang-Je Cho, Youn Nam Kim
PURPOSE: To compare controlled-release carbamazepine monotherapy (CBZ-CR) with lamotrigine and valproate combination therapy (LTG + VPA) in equivalent total drug load, as initial drug regimen in untreated patients with partial and/or generalized tonic-clonic seizures (GTCS). METHODS: This unblinded, randomized, 60-week superiority trial recruited patients having two or more unprovoked seizures with at least one seizure during previous three months. After randomization into CBZ-CR or LTG + VPA, patients entered into eight-week titration phase (TP), followed by 52-week maintenance phase (MP)...
December 29, 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/29323781/soil-phosphorus-does-not-keep-pace-with-soil-carbon-and-nitrogen-accumulation-following-woody-encroachment
#12
Yong Zhou, Thomas W Boutton, X Ben Wu
Soil carbon, nitrogen, and phosphorus cycles are strongly interlinked and controlled through biological processes, and the phosphorus cycle is further controlled through geochemical processes. In dryland ecosystems, woody encroachment often modifies soil carbon, nitrogen, and phosphorus stores, although it remains unknown if these three elements change proportionally in response to this vegetation change. We evaluated proportional changes and spatial patterns of soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP) concentrations following woody encroachment by taking spatially-explicit soil cores to a depth of 1...
January 11, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29323193/rapid-thermal-processing-to-enhance-steel-toughness
#13
V K Judge, J G Speer, K D Clarke, K O Findley, A J Clarke
Quenching and Tempering (Q&T) has been utilized for decades to alter steel mechanical properties, particularly strength and toughness. While tempering typically increases toughness, a well-established phenomenon called tempered martensite embrittlement (TME) is known to occur during conventional Q&T. Here we show that short-time, rapid tempering can overcome TME to produce unprecedented property combinations that cannot be attained by conventional Q&T. Toughness is enhanced over 43% at a strength level of 1...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29317970/evaluation-of-the-tp-te-interval-qtc-and-p-wave-dispersion-in-patients-with-coronary-artery-ectasia
#14
Ronan Conlon, Richard Tanner, Santhosh David, Gabor Szeplaki, Joseph Galvin, John Keaney, Edward Keelan, Usama Boles
Background: Coronary artery ectasia (CAE) is defined as a diffuse dilatation of the diameter of the ectatic segment of the coronary artery, 1.5 times greater than that of the adjacent segment. The Tp-Te interval, P-wave and QTc dispersions are relatively new electrocardiographic markers associated with an increased risk of developing arrhythmias. Despite CAE increasing in prevalence in recent years, there is a sparsity of data available about its arrhythmogenic effect. The aim of the study was to evaluate QTc, P-wave dispersion and Tp-Te and Tp-Te/QT ratio in patients with CAE...
December 2017: Cardiology Research
https://www.readbyqxmd.com/read/29317236/effect-of-ultrasound-pretreatment-on-enzymolysis-and-physicochemical-properties-of-corn-starch
#15
Mei Li, Junxun Li, Chuanhe Zhu
In the paper, the effects of ultrasound on the enzymolysis properties of corn starch were investigated. The results showed that the rate of enzymolysis changed with the change of ultrasonic conditions. Ultrasound pretreatment starches reduced the time in liquefaction process, and resulted in significantly higher DE value in saccharification process. DE value was negatively correlated to PV, BV, SV, To, Tp, ΔHg, DO, DD, N-O'KI, RC, Mw and DP, respectively, and positively correlated to Mw/Mn. X-ray diffraction analysis showed that the relative crystallinity was reduced, and the starch exhibited an A-pattern...
January 6, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29315961/reduction-of-thromboembolic-events-during-ablation-using-the-laserballoon-the-rethreva-registry
#16
Martin Eichenlaub, Arne Pfeufer, Lars Behrens, Volker Klauss, Michael Roettinger, Turgut Brodherr, Thorsten Lewalter
INTRODUCTION: Cerebral events (CE), including silent (SCE), are a known complication of left atrial catheter ablation (LACA) in patients with atrial fibrillation. The aim of this prospective registry was to gain more information about CE during laserballoon LACA and to reduce the risk of their occurrence. METHODS AND RESULTS: We enrolled 74 patients (age 61 ± 11 years; 74% male; CHA2 DS2 -VASc 1.9 ± 1.4). Cerebral MRI (1.5 Tesla) was performed to detect CE...
January 9, 2018: Journal of Cardiovascular Electrophysiology
https://www.readbyqxmd.com/read/29315265/spatial-and-seasonal-dynamics-of-water-environmental-capacity-in-mountainous-rivers-of-the-southeastern-coast-china
#17
Qiankun Liu, Jingang Jiang, Changwei Jing, Jiaguo Qi
The south-east littoral is one of the most populous and developed regions in China suffering from serious water pollution problems, and the Xian-Jiang Basin in the mid of this region is among the most polluted watersheds. Critical information is needed but lacking for improved pollution control and water quality assessment, among which water environmental capacity (WEC) is the most important variable but is difficult to calculate. In this study, a one-dimensional water quality model combined with a matrix calculation algorithm was first developed and calibrated with in-situ observations in the Xian-Jiang basin...
January 9, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29313730/the-immediate-and-long-term-effects-of-time-perspective-on-internet-gaming-disorder
#18
Kateřina Lukavská
Backgrounds and aims This study focuses on the role of time perspective (TP) in Internet gaming disorder (IGD). An inventory-based study on 377 massive multiplayer online role playing game players was conducted, followed by a 3-year-follow-up in which 48 active players from the original sample participated. We proposed that TP factors (negative TP and future positive TP) will influence either the current presence of IGD symptoms or the further development of IGD over time. In other words, the effect of TP is stable...
January 9, 2018: Journal of Behavioral Addictions
https://www.readbyqxmd.com/read/29313258/biodegradation-and-nutrients-removal-from-greywater-by-an-integrated-fixed-film-activated-sludge-ifas-in-different-organic-loadings-rates
#19
Hadi Eslami, Mohammad Hassan Ehrampoush, Hossein Falahzadeh, Parvaneh Talebi Hematabadi, Rasoul Khosravi, Arash Dalvand, Abbas Esmaeili, Mahmoud Taghavi, Ali Asghar Ebrahimi
In this study, the efficiency of Integrated Fixed-film Activated Sludge (IFAS) system in synthetic greywater treatment and nutrients removal was studied in duration of 105 days according to different Organic Loadings Rates (OLRs). The study was operated in pilot-scale and OLRs of 0.11-1.3 gCOD/L.d. Scanning Electron Microscope (SEM) image showed that the biofilm with a proper thickness was formed on IFAS reactor's media. The results indicated that the best removal efficiency of BOD5, COD, and TSS were 85...
January 8, 2018: AMB Express
https://www.readbyqxmd.com/read/29313198/treatment-for-domestic-wastewater-from-university-dorms-using-a-hybrid-constructed-wetland-at-pilot-scale
#20
Yuting He, Lian Peng, Yumei Hua, Jianwei Zhao, Naidong Xiao
A hybrid constructed wetland (CW) system was operated at pilot scale to evaluate the treatment of domestic wastewater from university dorms in Hubei province, China. The hybrid system consisted of an integrated vertical flow constructed wetland (IVF CW) (a down-flow VF CW and an up-flow VF CW) and a horizontal subsurface flow constructed wetland (HSF CW). The influent for the hybrid CW containing chemical oxygen demand (COD), total phosphorus (TP), total nitrogen (TN), and ammonium nitrogen (NH4+-N) with mean concentrations of 152, 0...
January 8, 2018: Environmental Science and Pollution Research International
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