2,458 results match your criteria AOA News[Journal]


Unbalanced Hybrid AOA/RSSI Localization for Simplified Wireless Sensor Networks.

Sensors (Basel) 2020 Jul 9;20(14). Epub 2020 Jul 9.

School of Electrical and Data Engineering, University of Technology Sydney, Ultimo 2007, Australia.

Source positioning using hybrid angle-of-arrival (AOA) estimation and received signal strength indicator (RSSI) is attractive because no synchronization is required among unknown nodes and anchors. Conventionally, hybrid AOA/RSSI localization combines the same number of these measurements to estimate the agents' locations. However, since AOA estimation requires anchors to be equipped with large antenna arrays and complicated signal processing, this conventional combination makes the wireless sensor network (WSN) complicated. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/s20143838DOI Listing

A Critical Review on Nitrous Oxide Production by Ammonia-Oxidizing Archaea.

Environ Sci Technol 2020 Jul 13. Epub 2020 Jul 13.

The continuous increase of nitrous oxide (N2O) in the atmosphere has become a global concern due to its property as a potent greenhouse gas. Given the important role of ammonia-oxidizing archaea (AOA) in ammonia oxidation and their involvement in N2O production, a clear understanding of the knowledge on archaeal N2O production is necessary for global N2O mitigation. Compared to bacterial N2O production by ammonia-oxidizing bacteria (AOB), AOA-driven N2O production pathways are less-well elucidated. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.est.0c03948DOI Listing

Response Characteristics of Nitrifying Bacteria and Archaea Community Involved in Nitrogen Removal and Bioelectricity Generation in Integrated Tidal Flow Constructed Wetland-Microbial Fuel Cell.

Front Microbiol 2020 23;11:1385. Epub 2020 Jun 23.

Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, China.

This study explores nitrogen removal performance, bioelectricity generation, and the response of microbial community in two novel tidal flow constructed wetland-microbial fuel cells (TFCW-MFCs) when treating synthetic wastewater under two different chemical oxygen demand/total nitrogen (COD/TN, or simplified as C/N) ratios (10:1 and 5:1). The results showed that they achieved high and stable COD, NH-N, and TN removal efficiencies. Besides, TN removal rate of TFCW-MFC was increased by 5-10% compared with that of traditional CW-MFC. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3389/fmicb.2020.01385DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7324634PMC

Age of Acquisition of Mandarin Modulates Cortical Thickness in High-Proficient Cantonese-Mandarin Bidialectals.

J Psycholinguist Res 2020 Jul 10. Epub 2020 Jul 10.

Center for the Study of Applied Psychology, Key Laboratory of Mental Health and Cognitive Science of Guangdong Province, School of Psychology, South China Normal University, Guangzhou, 510631, People's Republic of China.

Previous studies showed that the onset age of second language acquisition (AoA-L2) can modulate brain structure of bilinguals. However, the underlying mechanism of anatomical plasticity induced by AoA-L2 is still a question in debate. In order to explore the issue, we recruited two groups of native Cantonese-Mandarin speakers, the early group began to speak in Mandarin at about 3. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s10936-020-09716-5DOI Listing

Influences of hexafluoropropylene oxide (HFPO) homologues on soil microbial communities.

Chemosphere 2020 Jul 1;259:127504. Epub 2020 Jul 1.

State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China. Electronic address:

Hexafluoropropylene oxide (HFPO) homologues, as emerging perfluoroalkyl substances (PFASs) to replace legacy PFASs, have wide applications in the organofluorine industry and have been detected in the global environment. However, it is still unclear what effect HFPO homologues will exert on microbial abundance, community structure and function. The objective of this study was to assess potential impacts of HFPO homologue acids on archaea, bacteria, and ammonia-oxidizing archaea (AOA) and bacteria (AOB) in the soil environment. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.chemosphere.2020.127504DOI Listing

Alternative strategies of nutrient acquisition and energy conservation map to the biogeography of marine ammonia-oxidizing archaea.

ISME J 2020 Jul 7. Epub 2020 Jul 7.

School of Oceanography, University of Washington, Seattle, WA, USA.

Ammonia-oxidizing archaea (AOA) are among the most abundant and ubiquitous microorganisms in the ocean, exerting primary control on nitrification and nitrogen oxides emission. Although united by a common physiology of chemoautotrophic growth on ammonia, a corresponding high genomic and habitat variability suggests tremendous adaptive capacity. Here, we compared 44 diverse AOA genomes, 37 from species cultivated from samples collected across diverse geographic locations and seven assembled from metagenomic sequences from the mesopelagic to hadopelagic zones of the deep ocean. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1038/s41396-020-0710-7DOI Listing
July 2020
9.302 Impact Factor

The variation on nitrogen removal mechanisms and the succession of ammonia oxidizing archaea and ammonia oxidizing bacteria with temperature in biofilm reactors treating saline wastewater.

Bioresour Technol 2020 Jul 1;314:123760. Epub 2020 Jul 1.

Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China. Electronic address:

To reveal nitrogen removal mechanisms under environmental stresses, biofilm reactors were operated at different temperatures (10 °C-35 °C) treating saline wastewater (salinity 3%). The results showed nitrogen removal efficiency was 98.46% at 30 °C and 60. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.biortech.2020.123760DOI Listing

Implications of Change to USMLE Step 1 Scoring for Otolaryngology Residency Programs.

Otolaryngol Head Neck Surg 2020 Jul 7:194599820936631. Epub 2020 Jul 7.

Department of Otolaryngology-Head & Neck Surgery, Rutgers-New Jersey Medical School, Newark, New Jersey, USA.

Otolaryngology is a competitive specialty, with 398 US seniors applying to an offered 328 positions in 2019. Recent changes to US Medical Licensing Exam (USMLE) Step 1 scoring raise many questions for both medical student applicants and program directors. Otolaryngologists are known to be collegial and thoughtful physicians. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1177/0194599820936631DOI Listing

Genomic Characteristics of a Novel Species of Ammonia-oxidizing Archaea from the Jiulong River Estuary.

Appl Environ Microbiol 2020 Jul 6. Epub 2020 Jul 6.

SZU-HKUST Joint PhD Program in Marine Environmental Science, Shenzhen University, Shenzhen, China

Ammonia-oxidizing archaea (AOA) are ubiquitous in diverse ecosystems, and play a pivotal role in global nitrogen and carbon cycling. Although AOA diversity and distribution are widely studied mainly based on the (alpha subunit of ammonia monooxygenase) genotypes, only limited investigations addressed the relationship between AOA genetic adaptation, metabolic features, and ecological niches, especially in estuaries. Here, we have described the AOA communities along the Jiulong River Estuary in Southern China. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1128/AEM.00736-20DOI Listing

Dynamic Language Network in Early and Late Cantonese-Mandarin Bilinguals.

Front Psychol 2020 18;11:1189. Epub 2020 Jun 18.

Center for the Study of Applied Psychology, Key Laboratory of Mental Health and Cognitive Science of Guangdong Province, School of Psychology, South China Normal University, Guangzhou, China.

The brain representation of language in bilinguals is sculptured by several factors, such as age of acquisition (AoA) and proficiency level (PL) in second language. Although the effect of AoA-L2 on brain function and structure has been studied, little attention is devoted to dynamic properties of the language network and their differences between early and late bilinguals. In this study, we acquired resting-state fMRI data from early and late Cantonese (L1)-Mandarin (L2) bilinguals with high PLs of verbal fluency in both languages. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3389/fpsyg.2020.01189DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7314931PMC

Effective nitrogen removal from ammonium-depleted wastewater by partial nitritation and anammox immobilized in granular and thin layer gel carriers.

Water Res 2020 Jun 20;183:116078. Epub 2020 Jun 20.

Department of Civil and Environmental Engineering, University of Washington, 201 More Hall, Box 352700, Seattle, WA, 98195-2700, USA.

This study investigates the effect of physicochemical conditions on the partial nitritation and anammox treatment by immobilized ammonia oxidizers under ammonium-deplete conditions. The impact of oxygen and temperature was studied by measuring the activity of immobilized aerobic and anaerobic ammonia-oxidizing organisms (Ammonia-oxidizing bacteria (AOB) and archaea (AOA), and Anammox bacteria) embedded in polyvinyl alcohol - sodium alginate (PVA-SA) beads and in thin layer poly-ethylene glycol hydrogels. Beads and flat hydrogels were incubated in a fluidized bed reactor (FBR) and in two flow cells, respectively. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.watres.2020.116078DOI Listing

Use of phospholipase C zeta analysis to identify candidates for artificial oocyte activation: a case series of clinical pregnancies and a proposed algorithm for patient management.

Fertil Steril 2020 Jul;114(1):163-174

Nuffield Department of Women's and Reproductive Health, University of Oxford, Oxford, United Kingdom. Electronic address:

Objective: To investigate the applicability of phospholipase C zeta (PLCζ) analysis in assisting the clinical decision-making process when considering artificial oocyte activation (AOA) for infertile males in assisted reproductive technology.

Design: Fifty-six males (43 infertile/13 fertile) were screened using our PLCζ assay.

Setting: Fertility unit/university laboratory. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.fertnstert.2020.02.113DOI Listing

Grain size tunes microbial community assembly and nitrogen transformation activity under frequent hyporheic exchange: A column experiment.

Water Res 2020 Jun 13;182:116040. Epub 2020 Jun 13.

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, Jiangsu, 210098, PR China.

Hyporheic zones (HZ) are hotspots for biogeochemical reactions where groundwater and surface water mix. River dam buildings and other hydrologic controls alter the sediment grain size distribution and modify the downstream hyporheic exchange, with cascading effects on geochemical and microbial processes in river corridors. In this lab-scale column experiment, the N transformations in HZ filled with sediments in different grain sizes were investigated with a focus on understanding the interplay among variational hydraulic connectivity, microbial community structure, functional potential under frequent groundwater-surface water exchange. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.watres.2020.116040DOI Listing

Controlled blood sugar improves the eye's accommodative ability in type-1 diabetes.

Eye (Lond) 2020 Jul 2. Epub 2020 Jul 2.

Department of Optometry and Vision Science, School of Allied Health Sciences, College of Health and Allied Sciences, University of Cape Coast, Cape Coast, Ghana.

Purpose: To evaluate the impact of blood sugar level on ocular measures, including refractive error (RE), amplitude of accommodation (AoA), and lag of accommodation (LoA), in pre-presbyopes with type-1 diabetes.

Method: The fasting blood sugar (FBS) and ocular measures of type-1 diabetes patients (age: 14-39 years; n = 30) on insulin treatment was recorded while they fasted on two separate visits, at baseline and 3 months later. The AoA and LoA was measured with the appropriate spectacle correction worn. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1038/s41433-020-1058-yDOI Listing

[Effect of Applying Hydrochar for Reduction of Ammonia Volatilization and Mechanisms in Paddy Soil].

Huan Jing Ke Xue 2020 Feb;41(2):922-931

Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.

Hydrochar, as a product of the hydrothermal carbonization of biomass, has good application prospects for the NH volatilization reduction in rice fields due to its rich pore structure and functional surface. In this study, hydrochar was applied as a soil conditioner to paddy soil. A soil column experiment was conducted to investigate the effect of hydrochar on NH volatilization throughout the growth period of rice. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.13227/j.hjkx.201908026DOI Listing
February 2020

Biological Nitrification Inhibition (BNI): Phenotyping of a Core Germplasm Collection of the Tropical Forage Grass Under Greenhouse Conditions.

Front Plant Sci 2020 12;11:820. Epub 2020 Jun 12.

International Center for Tropical Agriculture (CIAT), Cali, Colombia.

Modern intensively managed pastures that receive large external nitrogen (N) inputs account for high N losses in form of nitrate (NO) leaching and emissions of the potent greenhouse gas nitrous oxide (NO). The natural plant capacity to shape the soil N cycle through exudation of organic compounds can be exploited to favor N retention without affecting productivity. In this study, we estimated the relationship between biological nitrification inhibition (BNI), NO emissions and plant productivity for 119 germplasm accessions of Guineagrass (), an important tropical forage crop for livestock production. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3389/fpls.2020.00820DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7304326PMC

Phage Display-Based Homing Peptide-Daunomycin Conjugates for Selective Drug Targeting to PANC-1 Pancreatic Cancer.

Pharmaceutics 2020 Jun 22;12(6). Epub 2020 Jun 22.

MTA-ELTE Research Group of Peptide Chemistry, Hungarian Academy of Sciences, 1117 Budapest, Hungary.

The Pancreatic Ductal Adenocarcinoma (PDAC) is one of the most aggressive and dangerous cancerous diseases, leading to a high rate of mortality. Therefore, the development of new, more efficient treatment approaches is necessary to cure this illness. Peptide-based drug targeting provides a new tool for this purpose. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/pharmaceutics12060576DOI Listing

Do soil property variations affect dicyandiamide efficiency in inhibiting nitrification and minimizing carbon dioxide emissions?

Ecotoxicol Environ Saf 2020 Jun 21;202:110875. Epub 2020 Jun 21.

College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, 712100, Shaanxi, China. Electronic address:

Nitrification inhibitors (NIs) are used to retard the nitrification process and reduce nitrogen (N) losses. However, the effects of soil properties on NI efficacy are less clear. Moreover, the direct and indirect effects of soil property variations on NI efficiency in minimizing carbon dioxide (CO) emissions have not been previously studied. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.ecoenv.2020.110875DOI Listing

Environmental Factors, More Than Spatial Distance, Explain Community Structure of Soil Ammonia-Oxidizers in Wetlands on the Qinghai-Tibetan Plateau.

Microorganisms 2020 Jun 21;8(6). Epub 2020 Jun 21.

CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.

In wetland ecosystems, ammonia oxidation highly depends on the activity of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB), which are, therefore, important for studying nitrogen cycling. However, the ammonia-oxidizer communities in the typical high-elevation wetlands are poorly understood. Here, we examined ammonia-oxidizer communities in soils from three wetland types and 31 wetland sites across the Qinghai-Tibetan Plateau. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/microorganisms8060933DOI Listing

Study of the phenolic profile of a grape pomace powder and its impact on delaying corn oil oxidation.

Nat Prod Res 2020 Jun 19:1-5. Epub 2020 Jun 19.

Department of Biotechnology, University of Verona, Verona, Italy.

The grape pomace, the main by-product from the winemaking industry, contains many bioactive substances that must be valorized. The aim of this study was to assess the total phenolic content (TPC), phenolics profile by using HPLC and the antioxidant activity (AOA). The results showed a TPC of 38. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1080/14786419.2020.1777414DOI Listing

Heterotrophic Thaumarchaea with Small Genomes Are Widespread in the Dark Ocean.

mSystems 2020 Jun 16;5(3). Epub 2020 Jun 16.

Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, California, USA

The is a diverse archaeal phylum comprising numerous lineages that play key roles in global biogeochemical cycling, particularly in the ocean. To date, all genomically characterized marine thaumarchaea are reported to be chemolithoautotrophic ammonia oxidizers. In this study, we report a group of putatively heterotrophic marine thaumarchaea (HMT) with small genome sizes that is globally abundant in the mesopelagic, apparently lacking the ability to oxidize ammonia. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1128/mSystems.00415-20DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7300363PMC

Differential Ecosystem Function Stability of Ammonia-Oxidizing Archaea and Bacteria following Short-Term Environmental Perturbation.

mSystems 2020 Jun 16;5(3). Epub 2020 Jun 16.

School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom

Rapidly expanding conversion of tropical forests to oil palm plantations in Southeast Asia leads to soil acidification following intensive nitrogen fertilization. Changes in soil pH are predicted to have an impact on archaeal ammonia-oxidizing archaea (AOA), ammonia-oxidizing bacteria (AOB), and complete (comammox) ammonia oxidizers and, consequently, on nitrification. It is therefore critical to determine whether the predicted effects of pH on ammonia oxidizers and nitrification activity apply in tropical soils subjected to various degrees of anthropogenic activity. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1128/mSystems.00309-20DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7300361PMC

Ecological and Geochemical Conditions for the Accumulation of Antioxidants in the Leaves of (L.) Bigel.

Plants (Basel) 2020 Jun 13;9(6). Epub 2020 Jun 13.

Institute of Living Systems, Immanuel Kant Baltic Federal University, Universitetskaya Str., 2, 236040 Kaliningrad, Russia.

The article explores how location affected the dynamics of accumulation of ascorbic acid (AC) and oxidized forms of AC-dehydroascorbic acid (DAA) and diketogulonic acid (DKGA) in beach pea during ontogenetic development. Our analysis focuses on research of the ecological and geochemical conditions growing of the plant on the Curonian Spit. The level of hydrogen peroxide and the activity of enzymes that break it down were analyzed. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/plants9060746DOI Listing

Value-based assessment of implementing a Pulmonary Embolism Response Team (PERT).

J Thromb Thrombolysis 2020 Jun 15. Epub 2020 Jun 15.

Gill Heart and Vascular Institute, Division of Cardiovascular Medicine, University of Kentucky, 900 S. Limestone, CTW 320, Lexington, KY, 40536, USA.

PERTs are a new, multidisciplinary approach to PE care. They were conceived to efficiently identify and risk stratify PE patients and standardize care delivery. More research needs to be conducted to assess the effects that PERTs have had on PE care. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s11239-020-02188-3DOI Listing

Diverse Thaumarchaeota Dominate Subsurface Ammonia-oxidizing Communities in Semi-arid Floodplains in the Western United States.

Microb Ecol 2020 Jun 13. Epub 2020 Jun 13.

Department of Earth System Science, Stanford University, Stanford, CA, 94305-4216, USA.

Subsurface microbial communities mediate biogeochemical transformations that drive both local and ecosystem-level cycling of essential elements, including nitrogen. However, their study has been largely limited to the deep ocean, terrestrial mines, caves, and topsoils (< 30 cm). Here, we present regional insights into the microbial ecology of aerobic ammonia oxidation within the terrestrial subsurface of five semi-arid riparian sites spanning a 900-km N-S transect. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s00248-020-01534-5DOI Listing

Role of tetrachloro-1,4-benzoquinone reductase in phenylalanine hydroxylation system and pentachlorophenol degradation in Bacillus cereus AOA-CPS1.

Int J Biol Macromol 2020 Jun 11;161:875-890. Epub 2020 Jun 11.

Discipline of Microbiology, School of Life Sciences, College of Agriculture, Engineering and Science, University of KwaZulu-Natal (Westville Campus), Private Bag X54001, Durban 4000, South Africa. Electronic address:

This study reports a ≅12.5 kDa protein tetrachloro-1,4-benzoquinone reductase (CpsD) from Bacillus cereus strain AOA-CPS1 (BcAOA). CpsD is purified to homogeneity with a total yield of 35% and specific activity of 160 U·mg of protein. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.ijbiomac.2020.06.083DOI Listing

[Effects of long-term fertilization on soil ammonia-oxidizing microorganisms].

Ying Yong Sheng Tai Xue Bao 2020 May;31(5):1459-1466

National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources/Ministry of Agriculture Key Laboratory of Arable Land Conservation in Northeast China, College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China.

Long-term fertilization can change the supply of soil carbon and nitrogen (N), with consequences on the abundance and community structure of soil microorganisms. Based on the long-term fertilization positioning experiment station of brown earth, we analyzed the dynamics of soil ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) under different fertilization treatments, including no fertilization (CK), low level of inorganic N fertilizer (N), high level of inorganic N fertilizer (N), and organic manure combined with inorganic N fertilizer (MN), aiming to provide a basis for microbiological mechanism of soil N transformation and improvement of soil fertility. The results showed that the ratio of AOA to AOB abundance was 2. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.13287/j.1001-9332.202005.024DOI Listing

Cloning, overexpression, purification, characterization and structural modelling of a metabolically active Fe dependent 2,6-dichloro-p-hydroquinone 1,2-dioxygenase (CpsA) from Bacillus cereus strain AOA-CPS_1.

Int J Biol Macromol 2020 Jun 5;161:247-257. Epub 2020 Jun 5.

Discipline of Microbiology, School of Life Sciences, College of Agriculture, Engineering and Science, University of KwaZulu-Natal (Westville Campus), Private Bag X54001, Durban 4000, Republic of South Africa. Electronic address:

2,6-Dichloro-p-hydroquinone (DiCHQ) aromatic-ring cleavage by DiCHQ 1,2-dioxygenase (CpsA) is very crucial for complete transformation of pentachlorophenol (PCP) to 2-chloromaleylacetate in Bacillus cereus AOA-CPS_1 (BcAOA). The 978 bp gene (cpsA) was detected and amplified in the genome of BcAOA; cloned, overexpressed and purified to homogeneity. CpsA showed a single ≅36. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.ijbiomac.2020.05.268DOI Listing

Effect of angle-of-attacks on deterministic lateral displacement (DLD) with symmetric airfoil pillars.

Biomed Microdevices 2020 Jun 3;22(2):42. Epub 2020 Jun 3.

School of Engineering and Computer Science, Washington State University, Vancouver, WA, 98686, USA.

Deterministic lateral displacement (DLD) is a microfluidic technique for size fractionation of particles/cells in continuous flow with a great potential for biological and clinical applications. Growing interest of DLD devices in enabling high-throughput operation for practical applications, such as circulating tumor cell (CTC) separation, necessitates employing higher flow rates, leading to operation at moderate to high Reynolds number (Re) regimes. Recently, it has been shown that symmetric airfoil shaped pillars with neutral angle-of-attack (AoA) can be used for high-throughput design of DLD devices due to their mitigation of vortex effects and preservation of flow symmetry under high Re conditions. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s10544-020-00496-2DOI Listing

C:N ratio is not a reliable predictor of NO production in acidic soils after a 30-day artificial manipulation.

Sci Total Environ 2020 Jul 2;725:138427. Epub 2020 Apr 2.

Institute of Plant Ecology, Justus-Liebig University Giessen, Heinrich-Buff-Ring 26, 35392 Giessen, Germany; School of Biology and Environmental Science and Earth Institute, University College Dublin, Belfield, Dublin, Ireland.

To test the effect of C:N ratio on soil NO production, NO production rates and pathways associated with nitrification (AOA-amoA, AOB-amoA, fungal ITS rDNA, bacterial 16S rRNA), and denitrification-related (nirK, nirS, nosZ) genes were investigated in subtropical forest (SF) and cropland (SC) soil in China in a 30-day C:N ratio manipulation. In addition, 24-hour C:N ratio manipulation, including the addition of acetic acid, were conducted to verify the results observed in the 30-day experiment. After 30 days of manipulation, the NO production rates (NO) increased from 2. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.scitotenv.2020.138427DOI Listing
July 2020
4.099 Impact Factor

Current Trends in Tonometry and Tonometer Tip Disinfection.

J Glaucoma 2020 Jul;29(7):507-512

Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear, Boston, MA.

Precis: A survey among members of the American Glaucoma Society (AGS) and the American Optometry Association (AOA) on tonometer preference and tonometer disinfection indicates a shift to disposable tonometer tips compared with 1987.

Purpose: This survey's purpose was to determine how eye care providers responded to the 2008 Centers of Disease Control (CDC) tonometer disinfection guidelines, which recommend 10% hypochlorite (dilute bleach) for reusable tonometers. Tonometers measure the eye pressure when they touch the cornea, an essential part of the eye examination. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1097/IJG.0000000000001566DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7335349PMC

Effects of Water Regime, Genotype, and Formative Stages on the Agro-Physiological Response of Sugarcane ( L.) to Drought.

Plants (Basel) 2020 May 23;9(5). Epub 2020 May 23.

Institute of Plant Breeding, College of Agriculture and Food Science, University of the Philippines at Los Baños, College, Laguna 4031, Philippines.

Drought during the formative stages of a plant's growth triggers a sequence of responses to maintain optimal growing conditions, but often at the expense of crop productivity. Two field experiments were conducted to determine the effect of drought on 10 high-yielding sugarcane genotypes at two formative stages (the tillering stage (TS) and stalk elongation (SS)), within 30 days after treatment imposition. The experiments followed a split-plot in a randomized complete block design with three replicates per genotype. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/plants9050661DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7284505PMC

Temperature decouples ammonia and nitrite oxidation in greenhouse vegetable soils.

Sci Total Environ 2020 Sep 20;733:139391. Epub 2020 May 20.

Jiangsu Key Laboratory of Low Carbon Agriculture and GHGs Mitigation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China. Electronic address:

The influence of temperature on soil ammonia (NH) and nitrite (NO) oxidation and related NO accumulation in soils remain unclear. The soil potential NH oxidation (PAO) and NO oxidation (PNO) rates were evaluated over a temperature gradient of 5-45 °C in six greenhouse vegetable soils using inhibitors. The values of temperature sensitivity traits such as temperature minimum (T), temperature optimum (T), and maximum absolute temperature sensitivity (T) were also fitted to the square root growth (SQRT) and macromolecular rate theory (MMRT) models. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.scitotenv.2020.139391DOI Listing
September 2020

Advanced nitrogen removal of low C/N ratio sewage in an anaerobic/aerobic/anoxic process through enhanced post-endogenous denitrification.

Chemosphere 2020 Aug 30;252:126624. Epub 2020 Mar 30.

National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, PR China. Electronic address:

Currently, it is a major challenge for waste water treatment plants (WWTPs) to achieve enhanced nitrogen removal economically and effectively from carbon-limited sewage to meet gradually stringent discharge quality standards. Enhanced nitrogen removal can be achieved by endogenous denitrification (ED) treatment of low C/N municipal sewage, but its application is limited by the slow reaction rate. In this study, a novel process of Sludge Double Recirculation-Anaerobic/Aerobic/Anoxic (SDR-AOA) was developed to improve nitrogen removal efficiency via ED. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.chemosphere.2020.126624DOI Listing

Effects of reducing chemical fertilizer combined with organic amendments on ammonia-oxidizing bacteria and archaea communities in a low-fertility red paddy field.

Environ Sci Pollut Res Int 2020 May 21. Epub 2020 May 21.

College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, People's Republic of China.

Ammonia oxidation process in soil has a great contribution to the emission of nitrous oxide, which is a hot issue in the study of N cycle of rice field ecosystem. Organic amendments which partially substitute chemical nitrogen fertilizer are widely adopted to optimizing N management and reduce the use of chemical nitrogen fertilizers in the paddy ecosystem, but their long-term effects on ammonia-oxidizing archaea (AOA) and bacteria (AOB) were not well understood. Thus, based on a 6-year field trial that comprised four fertilization strategies (CF, chemical fertilizer; PM, pig manure substituting for 20% chemical N; BF, biogas slurry substituting for 20% chemical N; and GM, milk vetch substituting for 20% chemical N) and no N fertilizer application as CK, the abundance and community structure of ammonia oxidizers were examined by using qPCR and Illumina Miseq sequencing approaches based on the functional marker genes (amoA) in a low-fertility paddy field. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s11356-020-09120-5DOI Listing

Soil microbes of an urban remnant riparian zone have greater potential for N removal than a degraded riparian zone.

Environ Microbiol 2020 May 21. Epub 2020 May 21.

UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6009, Australia.

Soils in the riparian zone, the interface between terrestrial and aquatic ecosystems, may decrease anthropogenic nitrogen (N) loads to streams through microbial transformations (e.g., denitrification). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/1462-2920.15092DOI Listing

Microbial N-cycling gene abundance is affected by cover crop specie and development stage in an integrated cropping system.

Arch Microbiol 2020 May 20. Epub 2020 May 20.

Department of Crop Science, School of Agricultural Sciences, São Paulo State University, Av. Universitária 3780, Botucatu, SP, 18610-034, Brazil.

Grasses of the Urochloa genus have been widely used in crop-livestock integration systems or as cover crops in no-till systems such as in rotation with maize. Some species of Urochloa have mechanisms to reduce nitrification. However, the responses of microbial functions in crop-rotation systems with grasses and its consequence on soil N dynamics are not well-understood. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s00203-020-01910-2DOI Listing

The Safety Profile of Intentional or Iatrogenic Sacrifice of the Artery of Adamkiewciz and Its Vicinity's Spinal Segmental Arteries: A Systematic Review.

Global Spine J 2020 Jun 1;10(4):464-475. Epub 2019 May 1.

The Alfred Hospital, Melbourne, Victoria, Australia.

Study Design: Systematic review.

Objectives: There is paucity of consensus on whether (1) the artery of Adamkiewicz (AoA) and (2) the number of contiguous segmental spinal arteries (SSAs) that can be safely ligated without causing spinal cord ischemia. The objective of this review is to determine the risk of motor neurological deficits from iatrogenic sacrifice of the (1) AoA and (2) its vicinity's SSAs. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1177/2192568219845652DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7222674PMC

Effect of Surgical Setting on Hospital-Reported Outcomes for Elective Lumbar Spinal Procedures: Tertiary Versus Community Hospitals.

Global Spine J 2020 Jun 16;10(4):375-383. Epub 2019 May 16.

University of Maryland School of Medicine, Baltimore, MD, USA.

Study Design: Retrospective cohort study.

Objective: As hospital compensation becomes increasingly dependent on pay-for-performance and bundled payment compensation models, hospitals seek to reduce costs and increase quality. To our knowledge, no reported data compare these measures between hospital settings for elective lumbar procedures. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1177/2192568219848666DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7222676PMC

Effects of Video Reversal on Gaze Patterns during Signed Narrative Comprehension.

J Deaf Stud Deaf Educ 2020 May;25(3):283-297

Center for Research in Language, University of California, San Diego.

Language knowledge, age of acquisition (AoA), and stimulus intelligibility all affect gaze behavior for reading print, but it is unknown how these factors affect "sign-watching" among signers. This study investigated how these factors affect gaze behavior during sign language comprehension in 52 adult signers who acquired American Sign Language (ASL) at different ages. We examined gaze patterns and story comprehension in four subject groups who differ in hearing status and when they learned ASL (i. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1093/deafed/enaa007DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7260695PMC

Effects of cadmium addition on net nitrogen mineralization processes in the urban constructed wetland soils of a Chinese delta.

Environ Geochem Health 2020 May 17. Epub 2020 May 17.

State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China.

Heavy metal pollution is a serious problem in wetland ecosystems, and the toxicity of heavy metals affects microorganisms, thus influencing the biogeochemical process of nitrogen (N). To investigate the effects of heavy metal cadmium (Cd) pollution on N mineralization in urban constructed wetland soils of the Pearl River Delta, a 40-day aerobic incubation experiment was conducted under three Cd addition treatments [no Cd addition (control), low Cd addition (LCA) and high Cd addition (HCA)]. The results showed that compared with the control, the LCA treatment enhanced the soil N mineralization rate (R), while the HCA treatment inhibited R, with the average R values in the control treatment of 0. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s10653-020-00597-0DOI Listing

Applying constructed wetland-microbial electrochemical system to enhance NH removal at low temperature.

Sci Total Environ 2020 Jul 17;724:138017. Epub 2020 Mar 17.

Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address:

NH removal at low temperature (<10 °C) has baffled researchers and engineers for decades. Bioelectrochemical process has been increasingly valued as a promising approach to enhance NH removal by both electrochemical and stimulated microbial processes. The feasibility and the mechanism of enhanced NH removal were investigated in Constructed Wetland-Microbial Electrochemical System (CW-MES) with different electrode spacings including Constructed Wetland-Microbial Fuel Cell (CW-MFC) and Constructed Wetland-Microbial Electrolysis Cell (CW-MEC) at low temperature. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.scitotenv.2020.138017DOI Listing

Metagenome-assembled genomes reveal unique metabolic adaptations of a basal marine Thaumarchaeota lineage.

ISME J 2020 May 13. Epub 2020 May 13.

Earth System Science, Stanford University, Stanford, CA, USA.

Thaumarchaeota constitute an abundant and ubiquitous phylum of Archaea that play critical roles in the global nitrogen and carbon cycles. Most well-characterized members of the phylum are chemolithoautotrophic ammonia-oxidizing archaea (AOA), which comprise up to 5 and 20% of the total single-celled life in soil and marine systems, respectively. Using two high-quality metagenome-assembled genomes (MAGs), here we describe a divergent marine thaumarchaeal clade that is devoid of the ammonia-oxidation machinery and the AOA-specific carbon-fixation pathway. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1038/s41396-020-0675-6DOI Listing

Simple photonics-based system for Doppler frequency shift and angle of arrival measurement.

Opt Express 2020 Apr;28(9):14028-14037

A novel photonic approach for simultaneously measuring both the Doppler frequency shift (DFS) and the angle of arrival (AOA) of a microwave signal in a radar system is presented. It has the same structure as a fiber optic link consisting of a laser, an optical modulator and a photodetector. The incoming microwave signal and a reference signal are applied to the optical modulator. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1364/OE.389439DOI Listing

HS induces NO in the regulation of AsA-GSH cycle in wheat seedlings by water stress.

Protoplasma 2020 May 12. Epub 2020 May 12.

School of Life Sciences, Henan University, Kaifeng, 475004, China.

In current study, we investigated the relationship between hydrogen sulfide (HS) and nitric oxide (NO) in the regulation of ascorbate-glutathione (AsA-GSH) cycle in wheat seedlings by water stress. Findings showed that water stress significantly stimulated the production of HS and NO, the transcript levels and activities of enzymes in AsA-GSH cycle, as well as malondialdehyde (MDA) production and electrolyte leakage, but significantly decreased AsA/DHA and GSH/GSSG. Meanwhile, water stress significantly decreased plant height and dry biomass. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s00709-020-01510-3DOI Listing

Shifting abundances of communities associated to nitrogen cycling in soils promoted by sugarcane harvest systems.

Lett Appl Microbiol 2020 May 12. Epub 2020 May 12.

Department of Soil Science, University of São Paulo, "Luiz de Queiroz" College of Agriculture, Piracicaba, SP, Brazil.

Sugarcane cultivation supportsBrazil as one of the largest world sugar and ethanol producer. In order to understand the impact of changing sugarcane harvest from manual to mechanized harvest, we studied the effect of machinery traffic on soil and consequently soil compaction upon the soil microbial communities involved in the nitrogen cycling.The impact of sugarcane harvest was dependent on soil depth and texture. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1111/lam.13314DOI Listing

Evaluation of antioxidant activity of chlorogenic acids and coffee extracts by an electrochemical DNA-based biosensor.

Food Chem 2020 Apr 24;325:126787. Epub 2020 Apr 24.

Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia. Electronic address:

Sensitivity of dsDNA structure towards OH radicals as the pro-oxidants has been utilized as the detection principle of an analytical procedure applied for the first time to the evaluation of antioxidant activity (AOA) of 6 chlorogenic acids (CGAs) and extracts of 10 coffees. A nanostructured electrochemical DNA-based biosensor was prepared using a commercial electrode assembly and treated in the DNA cleavage agent formed by the Fenton type reaction. An addition of CGAs and aqueous coffee extracts significantly diminishes the degree of DNA degradation determined using cyclic voltammetry (CV) with the redox indicator [Fe(CN)]. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.foodchem.2020.126787DOI Listing

Interaction type of tetrabromobisphenol A and copper manipulates ammonia-oxidizing archaea and bacteria communities in co-contaminated river sediments.

Environ Pollut 2020 Sep 28;264:114671. Epub 2020 Apr 28.

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, Jiangsu, 210098, PR China.

The combined contamination of brominated flame retardants (BFRs) and heavy metals in electronic waste (e-waste) recycling and disposal areas has been a serious concern owing to their environmental persistence and chronic toxicities. Ammonia oxidizers, e.g. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.envpol.2020.114671DOI Listing
September 2020