2,131 results match your criteria AOA News[Journal]


A Novel 12q13.2-q13.3 Microdeletion Syndrome With Combined Features of Diamond Blackfan Anemia, Pierre Robin Sequence and Klippel Feil Deformity.

Front Genet 2018 19;9:549. Epub 2018 Nov 19.

Department of Woman, Child and General and Specialized Surgery, University of Campania "L. Vanvitelli" Naples, Italy.

Diamond-Blackfan anemia (DBA) is a rare congenital erythroid aplasia with a highly heterogeneous genetic background; it usually occurs in infancy. Approximately 30-40% of patients have other associated congenital anomalies; in particular, facial anomalies, such as cleft palate, are part of about 10% of the DBA clinical presentations. Pierre Robin sequence (PRS) is a heterogeneous condition, defined by the presence of the triad of glossoptosis, micrognathia and cleft palate; it occurs in 1/8500 to 1/14,000 births. Read More

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November 2018

Transcriptional activity and diversity of comammox bacteria as a previously overlooked ammonia oxidizing prokaryote in full-scale wastewater treatment plants.

Sci Total Environ 2018 Nov 29;656:717-722. Epub 2018 Nov 29.

College of Environmental Science and Engineering, The Key Laboratory of Resources and Environmental Systems Optimization, Ministry of Education, North China Electric Power University, Beijing 102206, China.

The discovery of complete ammonia oxidizing bacteria (CAOB) has fundamentally overturned the traditional recognition of nitrification. However, little was known about the transcriptional activity and diversity of the newly recognized ammonia oxidizing prokaryote in engineered ecosystems. To fill this gap, transcriptional investigations of CAOB amoA genes were carried out comparatively with the canonical ammonia oxidizing bacteria (AOB) and archaea (AOA) in eight full-scale wastewater treatment plants (WWTPs). Read More

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November 2018

New docs on the block: A profile of applicants and subsequent PGY1 trainees of categorical general surgery programs (2013-2016).

Am J Surg 2018 Nov 30. Epub 2018 Nov 30.

One:MAP Surgical Analytics, Department of Surgery, Loyola University Chicago Health Sciences Campus, 2160 S. 1st Avenue, Maywood, IL, 60153, USA; University of South Florida, Department of Surgery, Tampa, FL, USA. Electronic address:

Background: The categorical general surgery (GS) applicant pool and trainees have evolved. The purpose of this study is to profile contemporary applicants and subsequent matriculates of GS residencies.

Study Design: This study is a retrospective review of GS applicant and PGY1 trainee data which were obtained from ERAS, NRMP, and AAMC for the years 2013-2016. Read More

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November 2018

Effects of ofloxacin on nitrogen removal and microbial community structure in constructed wetland.

Sci Total Environ 2018 Nov 27;656:503-511. Epub 2018 Nov 27.

Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, E1A 07-03, Singapore117576, Singapore.

Constructed wetlands (CWs) have emerged as a promising technology for the purification of micro-polluted water. However, their nitrogen removal performance can be significantly degraded by design, operational, and environmental factors. The present study investigates the effects of ofloxacin (OFL: 0. Read More

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November 2018
2 Reads

Drying and Rainfall Shape the Structure and Functioning of Nitrifying Microbial Communities in Riverbed Sediments.

Front Microbiol 2018 16;9:2794. Epub 2018 Nov 16.

Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany.

Non-flow periods in fluvial ecosystems are a global phenomenon. Streambed drying and rewetting by sporadic rainfalls could drive considerable changes in the microbial communities that govern stream nitrogen (N) availability at different temporal and spatial scales. We performed a microcosm-based experiment to investigate how dry period duration (DPD) (0, 3, 6, and 9 weeks) and magnitude of sporadic rewetting by rainfall (0, 4, and 21 mm applied at end of dry period) affected stocks of N in riverbed sediments, ammonia-oxidizing bacteria (AOB) and archaea (AOA) and rates of ammonia oxidation (AO), and emissions of nitrous oxide (NO) to the atmosphere. Read More

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November 2018
1 Read
3.941 Impact Factor

Effects of antibiotic residuals in dewatered sludge on the behavior of ammonia oxidizers during vermicomposting maturation process.

Chemosphere 2018 Nov 28;218:810-817. Epub 2018 Nov 28.

School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Anning West Road No. 88, Lanzhou, 730070, China.

Antibiotics existed in dewatered sludge may affect the organic decomposition and nitrification efficiency of vermicomposting process, and thus lowering the agricultural value of sludge vermicompost. However, few studies have focused on the effects of antibiotics during vermicomposting process of sludge, notably for the maturated phage. Hence, this study aimed to investigate the effects of antibiotics on the nitrification rate and the features of ammonia oxidizing archaea (AOA) and bacteria (AOB) during vermicomposting maturated phage of sludge. Read More

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November 2018

Effects of fumigation with 1,3-dichloropropene on soil enzyme activities and microbial communities in continuous-cropping soil.

Ecotoxicol Environ Saf 2018 Nov 28;169:730-736. Epub 2018 Nov 28.

Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, 61 Daizong Street, Tai'an, Shandong 271018, People's Republic of China. Electronic address:

The compound 1,3-D (1,3-dichloropropene) is a potential candidate soil fumigant due to the restrictions on methyl bromide (MB). To date, little is known about the soil microbial community changes induced by 1,3-D fumigation. Therefore, soil properties, related soil enzymes, genes encoding the key enzymes of ammonia oxidation in both ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) and bacterial diversity were investigated to assess the effects of 1,3-D fumigation on the soil microbial community. Read More

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November 2018

Accuracy Bounds for Array-Based Positioning in Dense Multipath Channels.

Sensors (Basel) 2018 Dec 3;18(12). Epub 2018 Dec 3.

Christian Doppler Laboratory for Location-aware Electronic Systems, Graz University of Technology, 8010 Graz, Austria.

The accuracy of radio-based positioning systems will be limited by multipath interference in realistic application scenarios. This paper derives closed-form expressions for the Cramér⁻Rao lower bound (CRLB) on the achievable time-of-arrival (ToA) and angle-of-arrival (AoA) estimation-error variances, considering the presence of multipath radio channels, and extends these results to position estimation. The derivations are based on channel models comprising deterministic, specular multipath components as well as stochastic, diffuse/dense multipath. Read More

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December 2018
1 Read

Diversity and seasonal distribution of ammonia-oxidizing archaea in the water column of a tropical estuary along the southeast Arabian Sea.

World J Microbiol Biotechnol 2018 Dec 3;34(12):188. Epub 2018 Dec 3.

Council of Scientific and Industrial Research (CSIR) - National Institute of Oceanography, Regional Centre, Cochin, Kerala, 682018, India.

Diversity and distribution pattern of ammonia-oxidizing archaea (AOA) were studied across a salinity gradient in the water column of Cochin Estuary (CE), a tropical monsoonal estuary along the southeast Arabian Sea. The water column of CE was found to be nutrient rich with high bacterial (3.7-6. Read More

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December 2018
3 Reads

Effects of age and extraction solvent on phytochemical content and antioxidant activity of fresh L. leaves.

Food Sci Nutr 2018 Nov 14;6(8):2188-2198. Epub 2018 Sep 14.

Food Biophysics, Biochemistry and Nutrition Laboratory Department of Food Science and Nutrition National School of Agro-Industrial Sciences (ENSAI) University of Ngaoundere Ngaoundere Cameroon.

Antioxidant activity (AOA) and phytochemical content of Lam leaves were determined as a function of their age and extraction solvent. Fresh Moringa leaves aged 30, 45, and 60 days were harvested and extracted with three solvents; methanol, ethanol, and water. AOA of leaf extracts was measured using radical scavenging assays (DPPH, ABTS, antiperoxide activity [APA]) and reducing assays (FRAP and total antioxidant capacity [TAC]), and these were correlated with total polyphenols (TPC), total flavonoids (TFC), and chlorophyll contents of leaves. Read More

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November 2018
8 Reads

Scientific publication misrepresentation among orthopaedic residency applicants.

Am J Surg 2018 Nov 27. Epub 2018 Nov 27.

Department of Orthopaedic Surgery and Rehabilitation, The University of Texas Medical Branch, Galveston, TX, USA.

Background: The predictors of erroneous publication reporting among orthopaedic surgery residency applicants have not been established.

Methods: A retrospective analysis of the reported scholarly activity of candidates who applied to our orthopaedic surgery department for a first-year residency position in 2017 was conducted to determine the incidence of scientific publication misrepresentation and analyze its association with pre-residency criteria.

Results: Out of 510 candidates, 264 (51. Read More

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November 2018

Effects of assisted oocyte activation with calcium- ionophore and strontium chloride on ICSI outcomes.

Iran J Basic Med Sci 2018 Nov;21(11):1109-1117

Department of Reproductive Biotechnology, Reproductive Biomedicine Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran.

Objectives: Failed fertilization after intra-cytoplasmic sperm injection (ICSI) is mainly attributed to failed oocyte activation and can be overcome by artificial oocyte activation (AOA). The present study aims to compare outcomes of ICSI following two different assisted oocyte activation chemical procedures (SrCl and Ionomycin) in sibling oocytes of ICSI candidates.

Materials And Methods: From March 2015 until February 2016, 105 infertile men with 99-100% abnormal sperm morphology, irrespective of sperm motility, concentration, or origin (semen or testicular) were included in this study. Read More

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November 2018

Employing Ray-Tracing and Least-Squares Support Vector Machines for Localisation.

Sensors (Basel) 2018 Nov 20;18(11). Epub 2018 Nov 20.

Communication Systems & Networks Group, University of Bristol, Bristol BS8 1UB, UK.

This article evaluates the use of least-squares support vector machines, with ray-traced data, to solve the problem of localisation in multipath environments. The schemes discussed concern 2-D localisation, but could easily be extended to 3-D. It does not require NLOS identification and mitigation, hence, it can be applied in any environment. Read More

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November 2018

[Effects of long-term different fertilization regimes on the abundance and community structure of ammonia oxidizers in paddy soils].

Ying Yong Sheng Tai Xue Bao 2018 Nov;29(11):3829-3837

College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China.

Ammonia oxidation, driven by the ammonia oxidizers, is the rate-limiting step of nitrification and plays a key role in soil nitrogen cycling. In this study, real-time PCR and Illumina MiSeq sequencing approaches were used to investigate the effects of long-term different fertilization regimes on the abundance and community structure of ammonia oxidizers, targeting the amoA genes, in a 30-year located experimental paddy soil in Ningxiang County, Hunan Province. Four treatments were compared, including control without fertilizer (CK), fertilizers NPK (CF), 70% NPK plus 30% manure (CFM), and 40% NPK plus 60% manure (CFM). Read More

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November 2018
8 Reads

2018 AOA Research Abstracts and Poster Competition.

Authors:

J Am Osteopath Assoc 2018 Nov;118(11):e101-e202

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November 2018

Effects of sulphur and Thiobacillus thioparus 1904 on nitrogen cycle genes during chicken manure aerobic composting.

Waste Manag 2018 Oct 4;80:10-16. Epub 2018 Sep 4.

Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences/Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture/Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation, Guangzhou, Guangdong 510640, China.

Severe nitrogen (N) loss is a barrier for composting treatment. Since N transformation during composting is closely related to nitrogen loss, the impacts of adding sulphur and Thiobacillus thioparus 1904 to N transformation during composting were investigated in this work. Physicochemical properties and the expression of genes encoding N-related proteins were analysed to evaluate microbiological processes associated with N dynamics. Read More

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October 2018

Enhanced In Vitro Antitumor Activity of GnRH-III-Daunorubicin Bioconjugates Influenced by Sequence Modification.

Pharmaceutics 2018 Nov 9;10(4). Epub 2018 Nov 9.

Faculty of Science, Institute of Chemistry, Eötvös Loránd University, 1117 Budapest, Hungary.

Receptors for gonadotropin releasing hormone (GnRH) are highly expressed in various human cancers including breast, ovarian, endometrial, prostate and colorectal cancer. Ligands like human GnRH-I or the sea lamprey analogue GnRH-III represent a promising approach for the development of efficient drug delivery systems for targeted tumor therapy. Here, we report on the synthesis and cytostatic effect of 14 oxime bond-linked daunorubicin GnRH-III conjugates containing a variety of unnatural amino acids within the peptide sequence. Read More

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November 2018
3 Reads

Aglycemic HepG2 Cells Switch From Aminotransferase Glutaminolytic Pathway of Pyruvate Utilization to Complete Krebs Cycle at Hypoxia.

Front Endocrinol (Lausanne) 2018 26;9:637. Epub 2018 Oct 26.

Department of Mitochondrial Physiology, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czechia.

Human hepatocellular carcinoma HepG2 cells are forced to oxidative phosphorylation (OXPHOS), when cultured in aglycemic conditions at galactose and glutamine. These Oxphos cells represent a prototype of cancer cell bioenergetics with mixed aerobic glycolysis and OXPHOS. We aimed to determine fractions of (i) glutaminolytic pathway involving aminotransferase reaction supplying 2-oxoglutarate (2OG) to the Krebs cycle vs. Read More

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October 2018

[Responses of soil nitrogen transformation to long-term nitrogen fertilization and precipitation changes in a broad-leaved Korean pine forest in Changbai Mountains, China.]

Ying Yong Sheng Tai Xue Bao 2018 Sep;29(9):2797-2807

Changbai Mountains Forest Ecosystem Research Station, Antu 133613, Jilin, China.

Soil nitrogen (N) cycling, one of the most important biogeochemical processes in forest ecosystems, has significant environmental effects. However, little is known about how it responds to N deposition and precipitation changes. Here, we examined the main effects of N deposition (NF), rainfall reduction (RR) and their interactive effect (RF) on soil N cycling by N addition and transparent V-shaped board interception in a broad-leaved Korean pine forest in Changbai Mountains. Read More

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September 2018
6 Reads

Responses of Nitrogen-Cycling Microorganisms to Dazomet Fumigation.

Front Microbiol 2018 23;9:2529. Epub 2018 Oct 23.

Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.

The influence of soil fumigation on microorganisms involved in transforming nitrogen remains little understood, despite the use of fumigants for many decades to control soil-borne pathogens and plant-parasitic nematodes. We used real-time PCR (quantitative polymerase chain reaction) and 16S rRNA gene amplicon sequencing techniques to monitor changes in the diversity and community structure of microorganisms associated with nitrogen transfer after the soil was fumigated with dazomet (DZ). We also examined nitrous oxide (NO) emissions from these microorganisms present in fumigated fluvo-aquic soil and lateritic red soil. Read More

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October 2018
4 Reads
3.941 Impact Factor

Efficient AoA-Based Wireless Indoor Localization for Hospital Outpatients Using Mobile Devices.

Sensors (Basel) 2018 Oct 30;18(11). Epub 2018 Oct 30.

School of Engineering, University of Glasgow, Glasgow G12 8QQ, UK.

The motivation of this work is to help outpatients find their corresponding departments or clinics, thus, it needs to provide indoor positioning services with a room-level accuracy. Unlike wireless outdoor localization that is dominated by the global positioning system (GPS), wireless indoor localization is still an open issue. Many different schemes are being developed to meet the increasing demand for indoor localization services. Read More

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October 2018

Non-cognitive factors predicting success in orthopedic surgery residency.

Orthop Rev (Pavia) 2018 Sep 5;10(3):7559. Epub 2018 Sep 5.

Department of Orthopedics, University of Cincinnati Medical Center, Cincinnati, OH.

Admissions to orthopedic surgery is a highly competitive process. Traditionally measures such as United States Medical Licensing Examination (USMLE) Step 1, class rank, AOA status have been major determinants in the ranking process. However, these traditional objective measures show mixed correlation to clinical success in orthopedic surgery residency. Read More

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September 2018
3 Reads

Effects of knee simulator control method and radiation dose on UHMWPE wear rate, and relationship between wear rate and clinical revision rate in National Joint Registry.

J Mech Behav Biomed Mater 2018 Oct 1;90:182-190. Epub 2018 Oct 1.

JFE Techno-Research Corporation, 1-1 Minamiwatarida-cho, Kawasaki-ku, Kawasaki city, Kanagawa 210-0855, Japan.

The wear rate of five types of cruciate-retaining artificial knee joint ultrahigh-molecular-weight polyethylene (UHMWPE) inserts was examined using two custom-made knee joint simulators satisfying ISO 14243-1 (load control) and ISO 14243-3 (displacement control). The wear rate of knee joints composed of a UHMWPE insert and a Co-Cr-Mo alloy or oxidized zirconium femoral component linearly increased with increasing number of wear cycles, and the volumetric wear rate per million cycles was approximately 6-18 mm/Mc. The wear rate was the lowest in the highly crosslinked knee joint irradiated at 90 kGy (Scorpio) among the five UHMWPE inserts. Read More

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October 2018
13 Reads

Marine Biomass-Derived Porous Carbon Sheets with Tuneable N-Doping Content for Superior Sodium Ion Storage.

ACS Appl Mater Interfaces 2018 Oct 15. Epub 2018 Oct 15.

It is highly desirable to synthesis the electrode materials of sodium ion storage devices from sustainable precursors via green methods. In this work, we fabricated an unique N,O dual-doped biocarbon nanosheet (CBCS) with hierarchical porosity by direct pyrolysis of low-cost cuttle bones and simple air oxidation activation (AOA) technique. With prolonging AOA time, thickness of the carbon sheets could be reduced controllably (from 35 nm to 5 nm), which may lead to tunable preparation for carbon nanosheets with certain thickness. Read More

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October 2018
2 Reads
6.723 Impact Factor

Subjective ratings of age-of-acquisition: exploring issues of validity and rater reliability.

J Child Lang 2018 Oct 23:1-15. Epub 2018 Oct 23.

Division of Speech and Language Pathology,Karolinska Institutet,Stockholm,Sweden.

This study aimed to investigate concerns of validity and reliability in subjective ratings of age-of-acquisition (AoA), through exploring characteristics of the individual rater. An additional aim was to validate the obtained AoA ratings against two corpora - one of child speech and one of adult speech - specifically exploring whether words over-represented in the child-speech corpus are rated with lower AoA than words characteristic of the adult-speech corpus. The results show that less than one-third of participating informants' ratings are valid and reliable. Read More

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October 2018

Impact of Training Specialty on Breastfeeding Among Resident Physicians: A National Survey.

Breastfeed Med 2018 Oct 22. Epub 2018 Oct 22.

2 Department of Obstetrics and Gynecology, Crozer Chester Medical Center, One Medical Center Boulevard, Upland, Pennsylvania.

Objectives: The United States has seen an increasing number of child-bearing women in medical training. We aimed to compare the prevalence of exclusive breastfeeding across varied specialties, whose trainees may face different obstacles to breastfeeding.

Materials And Methods: An online survey querying the duration and barriers to breastfeeding was sent to Accreditation Council for Graduate Medical Education (ACGME) and American Osteopathic Association (AOA) programs. Read More

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October 2018
6 Reads

Comparative cell biological study of in vitro antitumor and antimetastatic activity on melanoma cells of GnRH-III-containing conjugates modified with short-chain fatty acids.

Beilstein J Org Chem 2018 26;14:2495-2509. Epub 2018 Sep 26.

Department Genetics, Cell- and Immunobiology, Semmelweis University, Nagyvárad tér 4., 1089 Budapest, Hungary.

Peptide hormone-based targeted tumor therapy is an approved strategy to selectively block the tumor growth and spreading. The gonadotropin-releasing hormone receptors (GnRH-R) overexpressed on different tumors (e.g. Read More

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September 2018
6 Reads

Incorporation of C-HCO by ammonia-oxidizing archaea and bacteria during ammonia oxidation of sludge from a municipal wastewater treatment plant.

Appl Microbiol Biotechnol 2018 Dec 20;102(24):10767-10777. Epub 2018 Oct 20.

Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok, 10330, Thailand.

Ammonia-oxidizing archaea (AOA) have recently been proposed as potential players for ammonia removal in wastewater treatment plants (WWTPs). However, there is little evidence directly showing the contribution of AOA to ammonia oxidation in these engineered systems. In this study, DNA-stable isotope probing (DNA-SIP) with labeled C-HCO was introduced to sludge from a municipal WWTP. Read More

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December 2018
1 Read

The Academic Chair: Achieving Success in a Rapidly Evolving Health-Care Environment: AOA Critical Issues.

J Bone Joint Surg Am 2018 Oct;100(20):e133

Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, Missouri.

There is a growing consensus that an accomplished curriculum vitae and prior achievement as an academician may not correlate with success as a chairperson of a contemporary academic orthopaedic department. As surgeons, formal professional education, research expertise, and clinical experience often are inadequate to foster the necessary skills and experience in executive leadership, change management, business administration, and strategy. The recruiting and hiring processes to fill academic leadership roles have been slow to adapt and recognize the skills that are necessary to be a successful chairperson. Read More

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October 2018

Novel variants in globozoospermic patients and the overcoming this male infertility.

Asian J Androl 2018 Oct 16. Epub 2018 Oct 16.

State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.

Globozoospermia has been reported to be a rare but severe causation of male infertility, which results from the failure of acrosome biogenesis and sperm head shaping. Variants of dpy-19-like 2 (DPY19L2) are highly related to globozoospermia, but related investigations have been mainly performed in patients from Western countries. Here, we performed a screening of DPY19L2 variants in a cohort of Chinese globozoospermic patients and found that five of nine patients carried DPY19L2 deletions and the other four patients contained novel DPY19L2 point mutations, as revealed by whole-exome sequencing. Read More

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October 2018
1 Read
2.530 Impact Factor

Population characteristics and influential factors of nitrogen cycling functional genes in heavy metal contaminated soil remediated by biochar and compost.

Sci Total Environ 2019 Feb 11;651(Pt 2):2166-2174. Epub 2018 Oct 11.

College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.

Sixteen treatments of soil contaminated by Cu, Pb, and Zn by the addition of a different percentage of biochar and compost were incubated for 120 days. The abundance of denitrifying genes such as narG, nirK, nirS and nosZ and the ammonia-oxidizing amoA genes of ammonia-oxidizing archaea/bacteria (AOA/AOB), soil nitrite reductase activity (S-NiR) and their shaping factors were also determined. The relationships between functional genes, S-NiR, and physico-chemical parameters were analyzed using the Pearson correlation method. Read More

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February 2019
1 Read

Preoperative gait asymmetry in end-stage unilateral ankle osteoarthrosis patients.

Foot Ankle Surg 2017 Dec 21. Epub 2017 Dec 21.

Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne (UNIL), Department of Orthopaedic Surgery and Traumatology, Pierre-Decker 4, CH-1011 Lausanne, Switzerland. Electronic address:

Background: Gait asymmetries following unilateral ankle surgeries have been reported in published literature. Preoperative compensatory gait patterns are usually assumed to be the cause; however, this hypothesis is not backed by objective data. This study aims to assess gait symmetry in patients with unilateral ankle osteoarthrosis (AOA). Read More

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December 2017
2 Reads

Organic Matter Regulates Ammonia-Oxidizing Bacterial and Archaeal Communities in the Surface Sediments of Aquaculture Ponds.

Front Microbiol 2018 24;9:2290. Epub 2018 Sep 24.

Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture, Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, China.

Ammonia-oxidizing bacteria (AOB) and archaea (AOA) play important roles in nitrogen removal in aquaculture ponds, but their distribution and the environmental factors that drive their distribution are largely unknown. In this study, we collected surface sediment samples from ponds in three different areas in China that practice aquaculture. The community structure of AOB and AOA and physicochemical characteristics in the ponds were investigated. Read More

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September 2018

Nitric Oxide Production from Nitrite Reduction and Hydroxylamine Oxidation by Copper-containing Dissimilatory Nitrite Reductase (NirK) from the Aerobic Ammonia-oxidizing Archaeon, Nitrososphaera viennensis.

Microbes Environ 2018 Oct 12. Epub 2018 Oct 12.

Department of Civil Engineering, National Institute of Technology, Nagaoka College.

Aerobic ammonia-oxidizing archaea (AOA) play a crucial role in the global nitrogen cycle by oxidizing ammonia to nitrite, and nitric oxide (NO) is a key intermediate in AOA for sustaining aerobic ammonia oxidation activity. We herein heterologously expressed the NO-forming, copper-containing, dissimilatory nitrite reductase (NirK) from Nitrososphaera viennensis and investigated its enzymatic properties. The recombinant protein catalyzed the reduction of NO to NO, the oxidation of hydroxylamine (NHOH) to NO, and the production of NO from NHOH and NO. Read More

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October 2018
1 Read

Ubiquity and Diversity of Complete Ammonia Oxidizers (Comammox).

Appl Environ Microbiol 2018 Dec 30;84(24). Epub 2018 Nov 30.

Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, School of Life Sciences, Fudan University, Shanghai, China

The discovery of complete ammonia oxidizers (comammox) refutes the century-old paradigm that nitrification requires the activity of two types of microbes. Determining the distribution and abundance of comammox in various environments is important for revealing the ecology of microbial nitrification within the global nitrogen cycle. In this study, the ubiquity and diversity of comammox were analyzed for samples from different types of environments, including soil, sediment, sludge, and water. Read More

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December 2018
12 Reads

Geospatial variation in co-occurrence networks of nitrifying microbial guilds.

Mol Ecol 2018 Oct 11. Epub 2018 Oct 11.

Swedish University of Agricultural Sciences, Department of Forest Mycology and Plant Pathology, Uppsala, Sweden.

Microbial communities transform nitrogen (N) compounds, thereby regulating the availability of N in soil. The N cycle is defined by interacting microbial functional groups, as inorganic N-products formed in one process are the substrate in one or several other processes. The nitrification pathway is often a two-step process in which bacterial or archaeal communities oxidize ammonia to nitrite, and bacterial communities further oxidize nitrite to nitrate. Read More

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October 2018
1 Read

Ammonia-Oxidizing Archaea (AOA) Play with Ammonia-Oxidizing Bacteria (AOB) in Nitrogen Removal from Wastewater.

Archaea 2018 13;2018:8429145. Epub 2018 Sep 13.

Qingdao University of Technology, Qingdao 266033, China.

An increase in the number of publications in recent years indicates that besides ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA) may play an important role in nitrogen removal from wastewater, gaining wide attention in the wastewater engineering field. This paper reviews the current knowledge on AOA and AOB involved in wastewater treatment systems and summarises the environmental factors affecting AOA and AOB. Current findings reveal that AOA have stronger environmental adaptability compared with AOB under extreme environmental conditions (such as low temperature and low oxygen level). Read More

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September 2018
2 Reads

Effect of sulfadiazine and trimethoprim on activated sludge performance and microbial community dynamics in laboratory-scale membrane bioreactors and sequencing batch reactors at 8°C.

Biotechnol Prog 2018 Oct 7. Epub 2018 Oct 7.

Dept. of Built Environment, Aalto University, Espoo, Finland.

The effect of antibiotics sulfadiazine and trimethoprim on activated sludge operated at 8°C was investigated. Performance and microbial communities of sequencing batch reactors (SBRs) and Membrane Bioreactors (MBRs) were compared before and after the exposure of antibiotics to the synthetic wastewater. The results revealed irreversible negative effect of these antibiotics in environmentally relevant concentrations on nitrifying microbial community of SBR activated sludge. Read More

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October 2018
2 Reads

Soil microbial community structure in the rhizosphere of Robinia pseudoacacia L. seedlings exposed to elevated air temperature and cadmium-contaminated soils for 4 years.

Sci Total Environ 2019 Feb 2;650(Pt 2):2355-2363. Epub 2018 Oct 2.

Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Shaanxi Key Laboratory of Land Consolidation, School of Environmental Science and Engineering, Chang'an University, Xi'an 710054, PR China.

The co-occurrence of heavy metal contamination of soils and increasing air temperature can affect the microbial community in rhizosphere soils by altering the allocation of plant photosynthates to roots. Here, we investigated the community structure of bacteria, fungi, ammonia oxidizing bacteria (AOB) and ammonia oxidizing archaea (AOA) in the rhizosphere of Robinia pseudoacacia L. seedlings exposed to elevated air temperature (+1. Read More

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February 2019
4 Reads

Potentiometry as a Tool for Monitoring of Antioxidant Activity and Oxidative Stress Estimation in Medicine.

Crit Rev Anal Chem 2018 Oct 4:1-10. Epub 2018 Oct 4.

a Sensors technology Center, Ural State University of Economics , Ekaterinburg , Russia.

The complexity of biological objects and the rapid change in their composition after sampling, the variety of compounds of different chemical nature, possessing oxidative and antioxidant properties, make the task of its estimating extremely nontrivial and important for food, nutrients and human health characterization. The paper discusses the use of potentiometry in determining integral antioxidant/oxidant activity mainly of biological fluids and human skin. The source of information is the electrode potential shift that occurs when the analyzed object is inserted in the solution of the mediator system or when the mediator system is exposed to human skin. Read More

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October 2018
7 Reads

Design of Amphibious Vehicle for Unmanned Mission in Water Quality Monitoring Using Internet of Things.

Sensors (Basel) 2018 Oct 3;18(10). Epub 2018 Oct 3.

Department of Computer Engineering, Sun Moon University, Asan-si 31460, Korea.

Unmanned aerial vehicles (UAVs) have gained significant attention in recent times due to their suitability for a wide variety of civil, military, and societal missions. Development of an unmanned amphibious vehicle integrating the features of a multi-rotor UAV and a hovercraft is the focus of the present study. Components and subsystems of the amphibious vehicle are developed with due consideration for aerodynamic, structural, and environmental aspects. Read More

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October 2018

Overdose fertilization induced ammonia-oxidizing archaea producing nitrous oxide in intensive vegetable fields.

Sci Total Environ 2019 Feb 27;650(Pt 2):1787-1794. Epub 2018 Sep 27.

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

Little is known about the effects of nitrogen (N) fertilization rates on ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) and their differential contribution to nitrous oxide (NO) production, particularly in greenhouse based high N input vegetable soils. Six N treatments (N1, N2, N3, N4, N5 and N6 representing 0, 293, 587, 880, 1173 and 1760 kg N ha yr, respectively) were continuously managed for three years in a typically intensified vegetable field in China. The aerobic incubation experiment involving these field-treated soils was designed to evaluate the relative contributions of AOA and AOB to NO production by using acetylene or 1-octyne as inhibitors. Read More

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February 2019
16 Reads

The 2018 American Orthopaedic Association-Japanese Orthopaedic Association (AOA-JOA) Traveling Fellowship.

J Bone Joint Surg Am 2018 Oct;100(19):e126

Department of Orthopaedic Surgery, Boston University School of Medicine and Boston Medical Center, Boston, Massachusetts.

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October 2018

Microsurgical Management of a Spinal Dural Arteriovenous Fistula With Shared Blood Supply to the Artery of Adamkiewicz: 3-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2018 Sep 24. Epub 2018 Sep 24.

Department of Neurosurgery, Emory University School of Medicine, Atlanta, Georgia.

The presented case is of a 65-yr-old gentleman referred for thoracic myelopathy. He developed bilateral, nondermatomal foot dysesthesia 14 mo prior to presentation, which progressed to numbness below the L3 level. He reported progressive gait instability, bilateral lower extremity weakness, and required a cane for ambulation. Read More

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September 2018
5 Reads

Implementing an Information System Strategy: A Cost, Benefit, and Risk Analysis Framework for Evaluating Viable IT Alternatives in the US Federal Government.

Int J Commun Netw Syst Sci 2018 Jun;11(6):105-132

Office of the Associate Director for Science, Centers for Disease Control and Prevention, Atlanta, GA, USA.

In the US Federal government, an analysis of alternatives (AoA) is required for a significant investment of resources. The AoA yields the recommended alternative from a set of viable alternatives for the investment decision. This paper presents an integrated AoA and project management framework for analyzing new or emerging alternatives (e. Read More

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Symbiotic fungal endophyte Phomopsis liquidambari-rice system promotes nitrogen transformation by influencing below-ground straw decomposition in paddy soil.

J Appl Microbiol 2018 Sep 21. Epub 2018 Sep 21.

Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, China.

Aims: To explore if and how symbiotic Phomopsis liquidambari-rice system influences below-ground straw decomposition and then nitrogen(N) transformation in response to environmental N levels.

Methods And Results: Litter bag experiments were utilized to trace the decay process during rice growth phases (seedling (T1), tillering (T2), heading (T3) and maturing (T4) stage), with (E+) and without endophyte (E-), under low (LN), medium (MN) and high nitrogen (HN) supply. Litter, soil and plant samples were collected to evaluate the decay process, N transformations, plant quality and relative abundance of soil ammonia-oxidizing archaea (AOA), ammonia-oxidizing bacteria (AOB) and P. Read More

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September 2018
6 Reads

Earthworms stimulate nitrogen transformation in an acidic soil under different Cd contamination.

Ecotoxicol Environ Saf 2018 Dec 17;165:564-572. Epub 2018 Sep 17.

Joint Institute for Environmental Research & Education, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China. Electronic address:

In acidic Cd-contaminated soils, soil nitrogen conversion is inhibited and usually block nitrogen supply for plants. Earthworms are well known for improving soil properties and regulating various soil biogeochemical processes including nitrogen cycling. To figure out the effect and mechanisms of earthworms on soil nitrogen transformation in Cd-contaminated soil, ten treatments with and without A. Read More

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December 2018
2 Reads

Insights into the physiology of ammonia-oxidizing microorganisms.

Authors:
Lisa Y Stein

Curr Opin Chem Biol 2018 Sep 17;49:9-15. Epub 2018 Sep 17.

Department of Biological Sciences, University of Alberta, Edmonton, T6G 2E9, Canada. Electronic address:

Nitrification is the aerobic process of the nitrogen cycle that converts ammonia to nitrate and is facilitated by ammonia-oxidizing and nitrite-oxidizing microorganisms. Ammonia-oxidizers are unique chemolithotrophs that evolved specialized networks of electron carriers to generate proton motive force using ammonia as a sole energy source as well as mechanisms to tolerate cytotoxic intermediates of their metabolism. Cultivation and genome sequencing of ammonia-oxidizing bacteria (AOB), archaea (AOA), and comammox bacteria (i. Read More

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September 2018
6.813 Impact Factor

Antioxidative 1,4-Dihydropyridine Derivatives Modulate Oxidative Stress and Growth of Human Osteoblast-Like Cells In Vitro.

Antioxidants (Basel) 2018 Sep 19;7(9). Epub 2018 Sep 19.

Latvian Institute of Organic Synthesis, 21 Aizkraukles Str., LV-1006 Riga, Latvia.

Oxidative stress has been implicated in pathophysiology of different human stress- and age-associated disorders, including osteoporosis for which antioxidants could be considered as therapeutic remedies as was suggested recently. The 1,4-dihydropyridine (DHP) derivatives are known for their pleiotropic activity, with some also acting as antioxidants. To find compounds with potential antioxidative activity, a group of 27 structurally diverse DHPs, as well as one pyridine compound, were studied. Read More

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September 2018
1 Read

Progressive Autonomy in the Era of Increased Supervision: AOA Critical Issues.

J Bone Joint Surg Am 2018 Sep;100(18):e122

F. Edward Hebert School of Medicine, Bethesda, Maryland.

The observation of decreased resident autonomy, ultimately influencing the readiness of a new graduate to practice, has been supported with a number of recent surveys. This perceived lack of autonomy is felt to be due, in part, to many reasons, including duty-hour regulations, increased supervision requirements, patient safety measures, concern for complication rates, and other performance measures. Pressure on faculty members to have increased clinical productivity may not allow for more resident autonomy. Read More

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September 2018