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https://www.readbyqxmd.com/read/29779147/promicromonospora-viridis-sp-nov-a-novel-actinomycete-isolated-from-soil
#1
Liying Jin, Junwei Zhao, Shanwen Jiang, Yang Zhao, Xiaoyang Han, Xiaowei Guo, Xiangjing Wang, Wensheng Xiang
Two Gram-stain positive, aerobic actinomycete strains, designated NEAU-JGR1T and NEAU-JGC41, were isolated from soil collected from Fairy Lake Botanical Garden in Shenzhen, Guangdong Province, south of China. The 16S rRNA gene sequences analysis showed that the two strains exhibited 99.5% 16S rRNA gene sequence similarity with each other and were closely related to Promicromonospora thailandica JCM 17130T (99.4, 99.3%) and Promicromonospora citrea DSM 43110T (99.2, 99.2%). Phylogenetic analysis based on the 16S rRNA gene sequences indicated that the two strains clustered together and formed a cluster with P...
May 19, 2018: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/29779078/effects-of-elevated-pressure-on-pseudanabaena-galeata-b%C3%A3-cher-in-varying-light-and-dark-environments
#2
Helayaye Damitha Lakmali Abeynayaka, Takashi Asaeda, M Harun Rashid
To understand the effect of the hydrostatic pressure on Pseudanabaena galeata Böcher cells in both stratified and frequently mixed lakes, separate laboratory-scale models were developed. The pressure conditions in the stratified and mixed lakes were simulated in those models, and the variations of the cell and chlorophyll-a (Chl-a) concentration were analyzed. It was observed that an increase in pressure and darkness significantly reduced the cell concentration and pigmentation in P. galeata (p < 0...
May 19, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29778679/efficient-metal-adsorption-and-microbial-reduction-from-rawal-lake-wastewater-using-metal-nanoparticle-coated-cotton
#3
Attarad Ali, Ayesha Gul, Abdul Mannan, Muhammad Zia
This study was designed to investigate removal of toxic metals and reduction of bacterial count from Rawal Lake wastewater with novel nanocomposite sorbents. Iron, zinc and silver oxide nanoparticles (NPs) were attached on cotton. The nanocomposites (iron NPs on cotton (FeCt), zinc NPs on cotton (ZnCt) and silver NPs on cotton (AgCt)) were characterized by FTIR, XRD and SEM, which showed successful adsorption of 10-30 nm size nanoparticles. Batch experiments were performed to determine the adsorption capacity of nanocomposite for metal removal...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29778677/growth-impacts-of-saharan-dust-mineral-nutrients-and-co-2-on-a-planktonic-herbivore-in-southern-mediterranean-lakes
#4
Manuel Villar-Argaiz, Marco J Cabrerizo, Juan Manuel González-Olalla, Macarena S Valiñas, Sanja Rajic, Presentación Carrillo
Rising levels of CO2 can boost plant biomass but reduce its quality as a food source for herbivores. However, significant uncertainties remain as to the degree to which the effect is modulated by other environmental factors and the underlying processes causing these responses in nature. To address these questions, we carried out CO2 -manipulation experiments using natural seston from three lakes under nutrient-enriched conditions (mimicking eutrophication and atmospheric dust-input processes) as a food source for the planktonic Daphnia pulicaria...
May 17, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29778174/development-of-methods-for-establishing-nutrient-criteria-in-lakes-and-reservoirs-a-review
#5
REVIEW
Shouliang Huo, Chunzi Ma, Beidou Xi, Yali Zhang, Fengchang Wu, Hongliang Liu
Nutrient criteria provide a scientific foundation for the comprehensive evaluation, prevention, control and management of water eutrophication. In this review, the literature was examined to systematically evaluate the benefits, drawbacks, and applications of statistical analysis, paleolimnological reconstruction, stressor-response model, and model inference approaches for nutrient criteria determination. The developments and challenges in the determination of nutrient criteria in lakes and reservoirs are presented...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29778056/one-century-sedimentary-record-of-heavy-metal-pollution-in-western-taihu-lake-china
#6
Yan Li, Shenglu Zhou, Qing Zhu, Baojie Li, Junxiao Wang, Chunhui Wang, Lian Chen, Shaohua Wu
Long-term trends of sediment compositions are important for assessing the impact of human activities on the sediment and protecting the sediment environment. In this study, based on the contents of heavy metals and the Pb isotope ratios in lake sediments, atmospheric dustfall and soil in Yixing, China, the representative heavy metals (Zn, Pb, Cr and Cd) in lake sediments from western Taihu Lake were studied. The evolution history of heavy metals in the local environment was constructed for the past 100 years...
May 16, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29777831/microcystis-bloom-containing-microcystin-lr-induces-type-2-diabetes-mellitus
#7
Qiong Zhang, Wendi Qin, Liuyan Yang, Jing An, Xuxiang Zhang, Hao Hong, Lizhi Xu, Yaping Wang
Epidemiological data from Lake Taihu showed significantly higher incidences of type 2 diabetes mellitus (T2DM) than in other areas of China. This may be related to the occurrence of a Microcystis bloom in Lake Taihu in the summer and autumn every year. The objective of this study is to investigate whether the contaminated water from the Microcystis bloom and the derivative pollutant microcystin-LR (MC-LR) can explain the higher incidences of T2DM. Healthy male mice were fed with water from different regions of Lake Taihu, and were either acutely or chronically exposed to MC-LR through oral administration or intraperitoneal injection...
May 16, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29777312/evaluating-organochlorine-pesticide-residues-in-the-aquatic-environment-of-the-lake-naivasha-river-basin-using-passive-sampling-techniques
#8
Yasser Abbasi, Chris M Mannaerts
Passive sampling techniques can improve the discovery of low concentrations by continuous collecting the contaminants, which usually go undetected with classic and once-off time-point grab sampling. The aim of this study was to evaluate organochlorine pesticide (OCP) residues in the aquatic environment of the Lake Naivasha river basin (Kenya) using passive sampling techniques. Silicone rubber sheet and Speedisk samplers were used to detect residues of α-HCH, β-HCH, γ-HCH, δ-HCH, heptachlor, aldrin, heptachlor epoxide, pp-DDE, endrin, dieldrin, α-endosulfan, β-endosulfan, pp-DDD, endrin aldehyde, pp-DDT, endosulfan sulfate, and methoxychlor in the Malewa River and Lake Naivasha...
May 18, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29776461/thermal-structure-induced-biochemical-parameters-stratification-in-a-subtropical-dam-reservoir
#9
(no author information available yet)
Although stratification in deep lakes was well discussed, few studies pay attention to thermal structure as well as itsinfluences on stratification of biochemical parameters in subtropical lakes in mountainous cities. Here, we studied the depth profile of temperature and biochemical parameters in Longjing Lake,a subtropical reservoir in a mountainous city. The thermal stratification became strong during summer. Biochemical parameters were strongly associated with thermal structure. Stratification started at 2~6 m depth with substantial decrease of dissolved oxygen (DO), biochemical oxygen demand (BOD5), chlorophyll a (Chla) and pH, corresponding to increase of total nitrogen (TN), ammonium (NH4+), nitrite (NO2-), total inorganic nitrogen (TIN), total phosphorus (TP) and soluble reactive phosphorus (SRP) with depth, and the majority of biochemical parameters showed slight variations from 12 m downward...
May 18, 2018: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/29775772/occurrence-genotyping-and-health-risk-of-cryptosporidium-and-giardia-in-recreational-lakes-in-tianjin-china
#10
Shumin Xiao, Pengna Yin, Yan Zhang, Xiaoyun Zhao, Liping Sun, Hongying Yuan, Jingfang Lu, Sike Hu
Cryptosporidium and Giardia are critical parasites in the etiology of diarrhea worldwide, and often cause waterborne outbreaks. The presence of Cryptosporidium and Giardia in recreational lakes was investigated with molecular characterization, and a comprehensive quantitative microbial risk assessment (QMRA) of protozoan infections was performed, considering multiple exposure pathways, differences in age, sex, and disease severity, and the genotypes of the protozoa. Forty-three (82.7%) and 51 (98.1%) water samples were positive for Cryptosporidium oocysts and Giardia cysts, respectively, with average counts of 3...
May 10, 2018: Water Research
https://www.readbyqxmd.com/read/29774415/development-of-a-cost-effective-production-process-for-halomonas-levan
#11
Burak Adnan Erkorkmaz, Onur Kırtel, Özlem Ateş Duru, Ebru Toksoy Öner
Levan polysaccharide is an industrially important natural polymer with unique properties and diverse high-value applications. However, current bottlenecks associated with its large-scale production need to be overcome by innovative approaches leading to economically viable processes. Besides many mesophilic levan producers, halophilic Halomonas smyrnensis cultures hold distinctive industrial potential and, for the first time with this study, the advantage of halophilicity is used and conditions for non-sterile levan production were optimized...
May 17, 2018: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/29774086/complete-genome-sequence-of-thiodictyon-syntrophicum-sp-nov-strain-cad16-t-a-photolithoautotrophic-purple-sulfur-bacterium-isolated-from-the-alpine-meromictic-lake-cadagno
#12
Samuel M Luedin, Joël F Pothier, Francesco Danza, Nicola Storelli, Niels-Ulrik Frigaard, Matthias Wittwer, Mauro Tonolla
" Thiodictyon syntrophicum" sp. nov. strain Cad16T is a photoautotrophic purple sulfur bacterium belonging to the family of Chromatiaceae in the class of Gammaproteobacteria . The type strain Cad16T was isolated from the chemocline of the alpine meromictic Lake Cadagno in Switzerland. Strain Cad16T represents a key species within this sulfur-driven bacterial ecosystem with respect to carbon fixation. The 7.74-Mbp genome of strain Cad16T has been sequenced and annotated. It encodes 6237 predicted protein sequences and 59 RNA sequences...
2018: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/29774020/high-diversity-of-myocyanophage-in-various-aquatic-environments-revealed-by-high-throughput-sequencing-of-major-capsid-protein-gene-with-a-new-set-of-primers
#13
Weiguo Hou, Shang Wang, Brandon R Briggs, Gaoyuan Li, Wei Xie, Hailiang Dong
Myocyanophages, a group of viruses infecting cyanobacteria, are abundant and play important roles in elemental cycling. Here we investigated the particle-associated viral communities retained on 0.2 μm filters and in sediment samples (representing ancient cyanophage communities) from four ocean and three lake locations, using high-throughput sequencing and a newly designed primer pair targeting a gene fragment (∼145-bp in length) encoding the cyanophage gp23 major capsid protein (MCP). Diverse viral communities were detected in all samples...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29774016/taxon-function-decoupling-as-an-adaptive-signature-of-lake-microbial-metacommunities-under-a-chronic-polymetallic-pollution-gradient
#14
Bachar Cheaib, Malo Le Boulch, Pierre-Luc Mercier, Nicolas Derome
Adaptation of microbial communities to anthropogenic stressors can lead to reductions in microbial diversity and disequilibrium of ecosystem services. Such adaptation can change the molecular signatures of communities with differences in taxonomic and functional composition. Understanding the relationship between taxonomic and functional variation remains a critical issue in microbial ecology. Here, we assessed the taxonomic and functional diversity of a lake metacommunity system along a polymetallic pollution gradient caused by 60 years of chronic exposure to acid mine drainage (AMD)...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29773594/interleukin-22-levels-are-increased-in-gastrointestinal-graft-versus-host-disease-in-children
#15
Dana T Lounder, Pooja Khandelwal, Nicholas J Gloude, Christopher E Dandoy, Sonata Jodele, Mario Medvedovic, Lee A Denson, Adam Lane, Kelly Lake, Bridget Litts, Alyss Wilkey, Stella M Davies
No abstract text is available yet for this article.
May 17, 2018: Haematologica
https://www.readbyqxmd.com/read/29773457/effect-of-increasing-flow-when-grooving-during-phacoemulsification
#16
Brian A Bird, Rhett S Thomson, Lance A Stutz, Joshua B Heczko, Ashlie A Bernhisel, William R Barlow, Brian Zaugg, Jeff H Pettey, Randall J Olson
PURPOSE: To determine optimum flow settings on the Centurion Vision System during the grooving step in cataract surgery. SETTING: John A. Moran Eye Center Laboratory, University of Utah, Salt Lake City, Utah, USA. DESIGN: Experimental study. METHODS: Intact porcine lenses hardened by formalin and placed in a chamber designed to simulate the anterior chamber of the eye were used to test flow rate settings at 20 mL/min, 40 mL/min, and 60 mL/min...
May 15, 2018: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29772888/mapping-malaria-risk-using-geographic-information-systems-and-remote-sensing-the-case-of-bahir-dar-city-ethiopia
#17
Amare Sewnet Minale, Kalkidan Alemu
The main objective of this study was to develop a malaria risk map for Bahir Dar City, Amhara, which is situated south of Lake Tana on the Ethiopian plateau. Rainfall, temperature, altitude, slope and land use/land cover (LULC), as well as proximity measures to lake, river and health facilities, were investigated using remote sensing and geographical information systems. The LULC variable was derived from a 2012 SPOT satellite image by supervised classification, while 30-m spatial resolution measurements of altitude and slope came from the Shuttle Radar Topography Mission...
May 7, 2018: Geospatial Health
https://www.readbyqxmd.com/read/29772375/duplex-functional-g-quadruplex-nmm-fluorescent-probe-for-label-free-detection-of-lead-ii-and-mercury-ii-ions
#18
Qian Zhu, Lanhua Liu, Yunpeng Xing, Xiaohong Zhou
To meet the severe water pollution status, multi-target biosensor becomes one of research focus. We herein report a novel duplex functional fluorescent biosensor for the label-free and separate detection of Pb2+ and Hg2+ with high sensitivity and selectivity. A K+ -induced fluorescent G-quadruplex probe was assembled by a guanine-rich sequence (AGRO100) and N-methyl mesoporphyrin IX(NMM). It changed into a more stably non-fluorescent G-quadruplex structure and a hairpin-like structure upon binding Pb2+ and Hg2+ ions, respectively...
May 1, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29770939/biomonitoring-levels-of-airborne-metals-around-urmia-lake-using-deciduous-trees-and-evaluation-of-their-tolerance-for-greenbelt-development
#19
Amir Mohammadi, Mehdi Mokhtari, Asghar Mosleh Arani, Hassan Taghipour, Yaghoub Hajizadeh, Hossein Fallahzadeh
In the northwest of Iran, the dust of salty and toxic metals possibly caused due to drying Urmia Lake is threatening the health of surrounding communities. This study aimed to employ leaves of local deciduous trees for biomonitoring of toxic elements and to evaluate air pollution tolerance of the trees for greenbelt application. Sampling from leaves of four dominant tree species including Vitis vinifera, Juglans regia, Ulmus umbraculifera, and Popolus alba was carried out from gardens in two radial distances (5 and 10 km) around the Urmia Lake accounting for 16 sites...
May 16, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29770934/total-and-methyl-mercury-seasonal-particulate-fluxes-in-the-water-column-of-a-large-lake-lake-geneva-switzerland
#20
Elena Gascón Díez, Neil D Graham, Jean-Luc Loizeau
Concentrations and fluxes of total and methylmercury were determined in surface sediments and associated with settling particles at two sites in Lake Geneva to evaluate the sources and dynamics of this toxic contaminant. Total mercury concentrations measured in settling particles were different throughout the seasons and were greatly influenced by the Rhone River particulate inputs. Total mercury concentrations closer to shore (NG2) ranged between 0.073 ± 0.001 and 0.27 ± 0.01 μg/g, and between 0...
May 16, 2018: Environmental Science and Pollution Research International
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