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https://www.readbyqxmd.com/read/28330260/impact-of-forest-vegetation-on-soil-characteristics-a-correlation-between-soil-biological-and-physico-chemical-properties
#1
L R Chandra, S Gupta, V Pande, N Singh
Temperate and dry deciduous forest covers major portion of terrestrial ecosystem in India. The two forest types with different dominant tree species differ in litter quality and root exudates, thereby exerting species-specific impact on soil properties and microbial activity. This study aims to examine the influence of forest type or dominant tree species on soil physico-chemical properties and its relationship with microbial characters in temperate and dry deciduous forest types. We assessed soil physico-chemical properties among five different sites located within the selected forest stand covered by different dominant species...
December 2016: 3 Biotech
https://www.readbyqxmd.com/read/28329725/ammonium-assimilation-an-important-accessory-during-aerobic-denitrification-of-pseudomonas-stutzeri-t13
#2
Yilu Sun, Liang Feng, Ang Li, Xuening Zhang, Jixian Yang, Fang Ma
The present study investigated effect of ammonium utilization on aerobic denitrification by Pseudomonas stutzeri T13. Per nitrogen balance calculation, all consumed ammonium was utilized as nitrogen source for cell propagation by assimilation rather than heterotrophic nitrification. Total organic carbon (TOC) and ammonium were necessary substrates to sustain heterotrophic propagation of P. stutzeri T13 at optimum proportion equal to seven. Under aerobic condition, nitrate was utilized as substitute nitrogen source when ammonium was completely exhausted...
March 12, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28326696/history-of-research-on-c-elegans-and-other-free-living-nematodes-as-model-organisms
#3
Victor Marc Nigon, Marie-Anne Félix
The nematode Caenorhabditis elegans is now a major model organism in biology. The choice of Sydney Brenner to adopt this species in the mid-1960s and the success of his team in raising it to a model organism status have been told (http://www.wormbook.org/toc_wormhistory.html; Brenner, 2001; Ankeny, 2001). Here we review the pre-Brenner history of the use of free-living nematodes as models for general questions in biology. We focus on the period that started in 1899 with the first publication of Emile Maupas mentioning Rhabditis elegans and ended in 1974 with the first publications by Brenner...
March 21, 2017: WormBook: the Online Review of C. Elegans Biology
https://www.readbyqxmd.com/read/28319500/clinical-response-profile-of-metastatic-advanced-pulmonary-neuroendocrine-tumors-to-peptide-receptor-radionuclide-therapy-with-177lu-dotatate
#4
Rahul V Parghane, Sanjay Talole, Kumar Prabhash, Sandip Basu
OBJECTIVES: The aims of this study were to perform multiparametric response assessment of metastatic/advanced pulmonary neuroendocrine tumors (NETs) to Lu-DOTATATE peptide receptor radionuclide therapy (PRRT) (clinical, biochemical, molecular/structural imaging, and survival assessment) and to study the relationship between response, mortality, and overall survival with dual-tracer molecular imaging parameters. METHODS: Twenty-two patients (6 women, 16 men; median age, 44 years; range, 16-72 years) of histopathologically proven pulmonary NETs with metastatic/advanced disease were included and analyzed retrospectively...
March 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28317441/oxidative-degradation-of-pentachlorophenol-by-permanganate-for-isco-application
#5
Roger Matta, Serge Chiron
Potassium permanganate (KMnO4) has been an effective technology for the in situ chemical oxidation (ISCO) of many organic compounds including chlorinated alkanes and alkenes, but it has rarely been applied for oxidizing aromatic organochlorines. This study confirms the ability of permanganate to oxidize an aromatic chlorinated compound, pentachlorophenol (PCP), in an efficient manner at neutral pH. The rate of the reaction between KMnO4 and PCP was calculated and the results indicated that the reaction between PCP and permanganate is relatively fast with a second order rate k"∼ 30 M(-1)s(-1)...
March 18, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28294180/solar-mediated-thermo-electrochemical-oxidation-of-sodium-dodecyl-benzene-sulfonate-by-modulating-the-effective-oxidation-potential-and-pathway-for-green-remediation-of-wastewater
#6
Di Gu, Simeng Gao, TingTing Jiang, Baohui Wang
To match the relentless pursuit of three research hot points - efficient solar utilization, green and sustainable remediation of wastewater and advanced oxidation processes, solar-mediated thermo-electrochemical oxidation of surfactant was proposed and developed for green remediation of surfactant wastewater. The solar thermal electrochemical process (STEP), fully driven with solar energy to electric energy and heat and without an input of other energy, sustainably serves as efficient thermo-electrochemical oxidation of surfactant, exemplified by SDBS, in wastewater with the synergistic production of hydrogen...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28293822/ibuprofen-removal-by-heterogeneous-photocatalysis-and-ecotoxicological-evaluation-of-the-treated-solutions
#7
EDITORIAL
João P Candido, Sandro J Andrade, Ana L Fonseca, Flávio S Silva, Milady R A Silva, Márcia M Kondo
Emerging contaminants including pharmaceuticals are a class of compounds that are causing great concern due to several environmental problems. Conventional water and wastewater treatments do not achieve high removal efficiencies for many of these drugs. Therefore, the present work investigated the removal of ibuprofen (IBP) by heterogeneous photocatalysis using TiO2 irradiated with artificial UV light or solar radiation. The treated solutions were tested against Daphnia similis and Raphidocelis subcapitata, which are species commonly used as bioindicators of environmental conditions...
March 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28290582/distribution-sources-and-ecological-risk-of-polycyclic-aromatic-hydrocarbons-in-the-estuarine-coastal-sediments-in-the-east-china-sea
#8
Ye Li, Xinran Liu, Min Liu, Xiaofei Li, Qing Wang, Junmin Zhu, Abdul Qadeer
Polycyclic aromatic hydrocarbons (PAHs), total organic carbon (TOC) and black carbon (BC) in the estuarine-coastal areas of the East China Sea (ECS) were investigated. The results showed that ∑PAH concentrations ranged from 61 to 355 ng g(-1) with a mean value of 146 ng g(-1). The contents of TOC and BC were in the range of 1.31-7.23 mg g(-1) and 0.52-5.60 mg g(-1), respectively. Data analyses showed that PAH concentrations had a positive linear relationship with TOC and with BC. In addition, the grain size of silts and clays had significant influence on the PAHs of sediments...
March 14, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28286536/associations-among-osteocalcin-leptin-and-metabolic-health-in-children-ages-9-13-years-in-the-united-states
#9
Kelly Virecoulon Giudici, Joseph M Kindler, Berdine R Martin, Emma M Laing, George P McCabe, Linda D McCabe, Dorothy B Hausman, Lígia Araújo Martini, Richard D Lewis, Connie M Weaver, Munro Peacock, Kathleen M Hill Gallant
BACKGROUND: This study aimed to investigate the relationships among osteocalcin, leptin and metabolic health outcomes in children ages 9-13 years. METHODS: This was a cross-sectional analysis of baseline data from 161 boys and 157 girls (ages 9-13 years) who previously participated in a double-blinded randomized placebo controlled trial of vitamin D supplementation. Relationships among fasting serum total osteocalcin (tOC), undercarboxylated osteocalcin (ucOC), leptin, and metabolic health outcomes were analyzed...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28285703/biofilm-processes-in-treating-mariculture-wastewater-may-be-a-reservoir-of-antibiotic-resistance-genes
#10
Shuai Li, Shenghua Zhang, Chengsong Ye, Wenfang Lin, Menglu Zhang, Lihua Chen, Jinmei Li, Xin Yu
Antibiotics are heavily used in Chinese mariculture, but only a small portion of the added antibiotics are absorbed by living creatures. Biofilm processes are universally used in mariculture wastewater treatment. In this study, removal of antibiotics (norfloxacin, rifampicin, and oxytetracycline) from wastewater by moving bed biofilm reactors (MBBRs) and the influence of antibiotics on reactor biofilm were investigated. The results demonstrated that there was no significant effect of sub-μg/L-sub-mg/L concentrations of antibiotics on TOC removal...
March 9, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28283569/the-novel-chloroplast-outer-membrane-kinase-koc1-is-a-required-component-of-the-plastid-protein-import-machinery
#11
Mónica Zufferey, Cyrille Montandon, Véronique Douet, Emilie Demarsy, Birgit Agne, Sacha Baginsky, Felix Kessler
The biogenesis and maintenance of cell organelles such as mitochondria and chloroplasts requires the import of many proteins from the cytosol, a process that is controlled by phosphorylation. In the case of chloroplasts, the import of hundreds of different proteins depends on Translocons at the Outer and Inner Chloroplast membrane (TOC and TIC, respectively) complexes. The essential protein TOC159 functions thereby as an import receptor. It has an N-terminal acidic (A) domain that extends into the cytosol, controls receptor specificity, and is highly phosphorylated in vivo...
March 10, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28281886/photodecolorisation-of-melanoidins-in-vinasse-with-illuminated-tio2-zno-activated-carbon-composite
#12
Benton O Otieno, Seth O Apollo, Bobby E Naidoo, Aoyi Ochieng
A hybrid photo-catalyst, TiO2-ZnO, was synthesized by immobilizing ZnO on commercial TiO2 (aeroxide P25). Activated carbon (AC) was subsequently used to support the hybrid, thus forming a TiO2-ZnO/AC composite catalyst. Fourier transform infrared (FTIR) analysis and scanning electron microscopy integrated with energy-dispersive X-ray spectroscopy (SEM-EDX) investigations revealed successful catalyst synthesis. Optical properties of the hybrid determined from photoluminescence (PL) and Ultraviolet-visible (UV-vis) spectroscopy confirmed a restrained recombination of electron-hole pairs and reduced energy band gap due to a successful heterojunction formation...
March 10, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28278771/an-effective-method-and-pathways-of-acrylonitrile-degradation-to-acrylic-acid-through-an-alkaline-hydrothermal-system
#13
Wenjie Dong, Boyu Peng, Ke Wang, Jia Miao, Wei Zhang, Yalei Zhang, Zheng Shen
Degradation of pollution for specific chemicals represents an optimal approach to high-strength wastewater treatment. One-pot selective conversion of acrylonitrile to acrylic acid in a hydrothermal system with NaOH as a catalyst was carried out. The influence factors were evaluated, including initial acrylonitrile concentration, reaction temperature, reaction time and amount of alkali. Experimental results showed that the highest yield of acrylic acid (55%) was obtained at the initial acrylonitrile concentration of 3 × 10(3) mg/L, 300°C for 90 s with 1...
February 28, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28278105/natural-light-micro-aerobic-condition-for-psb-wastewater-treatment-a-flexible-simple-and-effective-resource-recovery-wastewater-treatment-process
#14
Haifeng Lu, Ting Han, Guangming Zhang, Shanshan Ma, Yuanhui Zhang, Baoming Li, Wei Cao
Photosynthetic bacteria (PSB) have two sets of metabolic pathways. They can degrade pollutants through light metabolic under light-anaerobic or oxygen metabolic pathways under dark-aerobic conditions. Both metabolisms function under natural light-microaerobic condition, which demands less energy input. This work investigated the characteristics of PSB wastewater treatment process under that condition. Results showed that PSB had very strong adaptability to chemical oxygen demand (COD) concentration; with F/M of 5...
March 13, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28278085/catalyst-coated-cement-beads-for-the-degradation-and-mineralization-of-fungicide-carbendazim-using-lab-and-pilot-scale-reactor-catalyst-stability-analysis
#15
Amanjit Singh, Anoop Verma, Palak Bansal, Kashish Aggarwal, Taranjeet Kaur, Amrit Pal Toor, Vikas Kumar Sangal
The fixed-bed photocatalytic degradation of fungicide carbendazim using catalyst coated spherical cement beads has been investigated. Thirty beads with optimum size 13 mm along with 0.3 gL(-1) H2O2 with initial concentration of carbendazim to be 10 mgL(-1) were the optimized conditions for better degradation. The reduction in COD and TOC along with the generation of nitrite and nitrate ions under the optimized conditions confirms the complete mineralization of compound. The suggested degradation pathway for carbendazim has also been proposed as intermediates formed during photodegradation were analyzed through GC-MS...
March 3, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28277086/combined-uv-c-h2o2-vuv-processes-for-the-treatment-of-an-actual-slaughterhouse-wastewater
#16
Kambiz Vaezzadeh Naderi, Ciro Fernando Bustillo-Lecompte, Mehrab Mehrvar, Mohammad Jafar Abdekhodaie
In this study, a three-factor, three-level Box-Behnken design with response surface methodology were used to maximize the TOC removal and minimize the H2O2 residual in the effluent of the combined UV-C/H2O2-VUV system for the treatment of an actual slaughterhouse wastewater (SWW) collected from one of the meat processing plants in Ontario, Canada. The irradiation time and the initial concentrations of total organic carbon (TOCo) and hydrogen peroxide (H2O2o) were the three predictors, as independent variables, studied in the design of experiments...
February 10, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28269231/hemodynamic-effects-of-synchronizing-an-intra-aortic-vad-in-reverse-rotation-control-with-left-ventricle-a-mock-loop-study
#17
Yaxin Wang, P Alex Smith, Daniel L Timms, Po-Lin Hsu, Richard A McMahon
The IntraVAD is an intra-aortic left ventricular assist device (LVAD) to be located in the ascending aorta. In order to enhance unloading and promote coronary flow for the left ventricle (LV), an operating mechanism, reverse-rotation control (RRc) mode, has been developed for the IntraVAD and tested in vitro in a mock circulation loop (MCL). The RRc mode consists of forward rotation (FR) and reverse rotation (RR). The synchronization between the IntraVAD and the LV was studied to offload the ventricle more effectively and to improve myocardial perfusion...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28265816/efficacy-and-safety-of-morinidazole-in-pelvic-inflammatory-disease-results-of-a-multicenter-double-blind-randomized-trial
#18
C Cao, A Luo, P Wu, D Weng, H Zheng, S Wang
This multicenter, double-blind, randomized, parallel-group, non-inferiority study compared the efficacy and safety of morinidazole with those of ornidazole in women with pelvic inflammatory disease. Women from 18 hospitals in China received a 14-day course of either intravenous morinidazole, 500 mg twice daily (n = 168), or intravenous ornidazole, 500 mg twice daily (n = 170). A total of 312 of 338 patients in the full analysis set (FAS) (92.3%) were included in the per protocol set (PPS) analyses, 61 (19...
March 6, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28263215/pituitary-adenoma-recurrence-suspected-on-central-hyperthyroidism-despite-empty-sella-and-confirmed-by-68-ga-dota-toc-pet-ct
#19
Mathieu Gauthé, Julie Sarfati, Nathalie Bourcigaux, Sophie Christin-Maitre, Jean-Noël Talbot, Françoise Montravers
Thyrotropin-secreting pituitary adenomas are very rare tumors, known to present overexpression of somatostatin receptor subtype 2 and which may consequently demonstrate abnormal uptake on Ga-DOTA-TOC PET/CT. A 67-year-old woman with a history of operated pituitary macroadenoma presented with symptoms of hyperthyroidism including a large goiter. Her serum thyroid hormone levels were in favor of central hyperthyroidism. Pituitary MRI depicted an empty sella but visualized an ambiguous lesion centered on the left sphenoidal sinus...
March 3, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28260659/mechanism-of-oxidation-of-3-hydroxy-2-7-naphthalenedisulfonic-acid-disodium-salt-with-oxygen-in-subcritical-water
#20
Mirosław Imbierowicz
The article presents the results of studies on the oxidation mechanism of 3-hydroxy-2,7-naphthalenedisulfonic acid disodium salt (R-salt) with oxygen in subcritical water. To this aim, a series of experiments were carried out which showed that at a temperature of 413 K and pH > 9 the oxidation reaction of a substrate with oxygen was relatively quick and after approximately 40 min the R-salt oxidation yield exceeded 95%. In an acidic medium (pH < 7), the rate of R-salt oxidation is small. In order to identify the mechanism of R-salt oxidation, experiments were carried out at 413-569 K in solutions with pH = 10...
February 17, 2017: Chemosphere
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