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https://www.readbyqxmd.com/read/28093764/pre-ischemic-mitochondrial-substrate-constraint-by-inhibition-of-malate-aspartate-shuttle-preserves-mitochondrial-function-after-ischemia-reperfusion
#1
Nichlas Riise Jespersen, Takashi Yokota, Nicolaj Brejnholt Støttrup, Andreas Bergdahl, Kim Bolther Paelestik, Jonas Agerlund Povlsen, Flemming Dela, Hans Erik Bøtker
Mitochondrial dysfunction plays a central role in ischemia-reperfusion (IR) injury. The pre-ischemic administration of aminooxyacetate (AOA), an inhibitor of the malate-aspartate shuttle (MAS), provides cardioprotection against IR injury, but the underlying mechanism remains unknown. We hypothesized that a transient inhibition of the MAS during ischemia and early reperfusion could preserve mitochondrial function at later phase of reperfusion in IR-injured heart to the same extent as ischemic preconditioning (IPC), which is a well-validated cardioprotective strategy against IR injury...
January 17, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28063844/automatic-3d-aortic-annulus-sizing-by-computed-tomography-in-the-planning-of-transcatheter-aortic-valve-implantation
#2
Sandro Queirós, Christophe Dubois, Pedro Morais, Tom Adriaenssens, Jaime C Fonseca, João L Vilaça, Jan D'hooge
BACKGROUND: Accurate imaging assessment of aortic annulus (AoA) dimension is paramount to decide on the correct transcatheter heart valve (THV) size for patients undergoing transcatheter aortic valve implantation (TAVI). We evaluated the feasibility and accuracy of a novel automatic framework for multidetector row computed tomography (MDCT)-based TAVI planning. METHODS: Among 122 consecutive patients undergoing TAVI and retrospectively reviewed for this study, 104 patients with preoperative MDCT of sufficient quality were enrolled and analyzed with the proposed software...
December 30, 2016: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28060237/a-comparison-of-matched-and-unmatched-orthopaedic-surgery-residency-applicants-from-2006-to-2014-data-from-the-national-resident-matching-program
#3
John B Schrock, Matthew J Kraeutler, Michael R Dayton, Eric C McCarty
BACKGROUND: The Association of American Medical Colleges publishes residency match data and reports through the National Resident Matching Program (NRMP) every year. The purpose of this study was to analyze trends in orthopaedic surgery residency matching data and characteristics of successful applicants to counsel medical students with regard to their chances of matching. METHODS: The annual reports of the NRMP were searched annually from 2006 to 2014 to determine the number of orthopaedic surgery residency positions available, the number of applicants, and the match rate among applicants...
January 4, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28056367/bacterial-community-structure-in-simultaneous-nitrification-denitrification-and-organic-matter-removal-process-treating-saline-mustard-tuber-wastewater-as-revealed-by-16s-rrna-sequencing
#4
Jiale Wang, Benzhou Gong, Wei Huang, Yingmu Wang, Jian Zhou
A simultaneous nitrification, denitrification and organic matter removal (SNDOR) process in sequencing batch biofilm reactor (SBBR) was established to treat saline mustard tuber wastewater (MTWW) in this study. An average COD removal efficiency of 86.48% and total nitrogen removal efficiency of 86.48% were achieved at 30gNaClL(-1) during 100days' operation. The underlying mechanisms were investigated by PacBio SMRT DNA sequencing (V1-V9) to analyze the microbial community structures and its variation from low salinity at 10gNaClL(-1) to high salinity at 30gNaClL(-1)...
December 23, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/27996979/modeling-of-soil-nitrification-responses-to-temperature-reveals-thermodynamic-differences-between-ammonia-oxidizing-activity-of-archaea-and-bacteria
#5
Anne E Taylor, Andrew T Giguere, Conor M Zoebelein, David D Myrold, Peter J Bottomley
Soil nitrification potential (NP) activities of ammonia-oxidizing archaea and bacteria (AOA and AOB, respectively) were evaluated across a temperature gradient (4-42 °C) imposed upon eight soils from four different sites in Oregon and modeled with both the macromolecular rate theory and the square root growth models to quantify the thermodynamic responses. There were significant differences in response by the dominant AOA and AOB contributing to the NPs. The optimal temperatures (Topt) for AOA- and AOB-supported NPs were significantly different (P<0...
December 20, 2016: ISME Journal
https://www.readbyqxmd.com/read/27956222/effects-of-trehalose-vitrification-and-artificial-oocyte-activation-on-the-development-competence-of-human-immature-oocytes
#6
Zhiguo Zhang, Tianjuan Wang, Yan Hao, Fazil Panhwar, Zhongrong Chen, Weiwei Zou, Dongmei Ji, Beili Chen, Ping Zhou, Gang Zhao, Yunxia Cao
Sucrose and trehalose are conventional cryoprotectant additives for oocytes and embryos. Ethanol can artificially enhance activation of inseminated mature oocytes. This study aims to investigate whether artificial oocyte activation (AOA) with ethanol can promote the development competence of in vitro matured oocytes. A total of 810 human immature oocytes, obtained from 325 patients undergoing normal stimulated oocyte retrieval cycles, were in vitro maturated (IVM) either immediately after collection (Fresh group n = 291)) or after being vitrified as immature oocytes (Vitrified group n = 519)...
December 9, 2016: Cryobiology
https://www.readbyqxmd.com/read/27941955/diversity-abundance-and-activity-of-ammonia-oxidizing-microorganisms-in-fine-particulate-matter
#7
Jing-Feng Gao, Xiao-Yan Fan, Kai-Ling Pan, Hong-Yu Li, Li-Xin Sun
Increasing ammonia emissions could exacerbate air pollution caused by fine particulate matter (PM2.5). Therefore, it is of great importance to investigate ammonia oxidation in PM2.5. This study investigated the diversity, abundance and activity of ammonia oxidizing archaea (AOA), ammonia oxidizing bacteria (AOB) and complete ammonia oxidizers (Comammox) in PM2.5 collected in Beijing-Tianjin-Hebei megalopolis, China. Nitrosopumilus subcluster 5.2 was the most dominant AOA. Nitrosospira multiformis and Nitrosomonas aestuarii were the most dominant AOB...
December 12, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27939366/interpreting-experience-enhances-early-attentional-processing-conflict-monitoring-and-interference-suppression-along-the-time-course-of-processing
#8
Yanping Dong, Fei Zhong
To explore how interpreting experience may modulate young adults' executive functioning, the present study conducted two ERP studies using the Flanker task, and recruited university students of more or less interpreting experience. Experiment 1 revealed that participants of more interpreting experience exhibited larger N1 and N2 amplitudes in both congruent and incongruent conditions, which, according to previous research, are respectively evidence for advantages in early attentional processing and monitoring...
December 8, 2016: Neuropsychologia
https://www.readbyqxmd.com/read/27913871/n2o-emission-characteristics-and-its-affecting-factors-in-rain-fed-potato-fields-in-wuchuan-county-china
#9
Liwei Wang, Cheng Wang, Zhihua Pan, Hui Xu, Lin Gao, Peiyi Zhao, Zhiqiang Dong, Jingting Zhang, Guohui Cui, Sen Wang, Guolin Han, Hui Zhao
Representing an important greenhouse gas, nitrous oxide (N2O) emission from cultivated land is a hot topic in current climate change research. This study examined the influences of nitrogen fertilisation, temperature and soil moisture on the ammonia monooxygenase subunit A (amoA) gene copy numbers and N2O emission characteristics. The experimental observation of N2O fluxes was based on the static chamber-gas chromatographic method. The ammonia-oxidising bacteria (AOB) and ammonia-oxidising archaea (AOA) gene copy numbers in different periods were measured by real-time polymerase chain reaction (PCR)...
December 3, 2016: International Journal of Biometeorology
https://www.readbyqxmd.com/read/27904414/near-infrared-spectroscopic-analysis-of-total-phenolic-content-and-antioxidant-activity-of-berry-fruits
#10
Jasenka Gajdoš Kljusurić, Kiril Mihalev, Ivana Bečić, Ivana Polović, Mariya Georgieva, Senka Djaković, Želimir Kurtanjek
This study evaluates the feasibility of using near-infrared (NIR) spectroscopy as a rapid and environmentally friendly technique for validation and prediction of the total phenolic content (TPC) and antioxidant activity (AOA) indices (as 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging, inhibition time (IT) of the Briggs-Rauscher oscillating reaction, and relative antioxidant capacity (RAC)) of berry fruit extracts. The analysed berry samples originated from Croatia (blackberries, wild blueberries, raspberries, red currants and strawberries) and Bulgaria (wild blueberries, raspberries and strawberries)...
June 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27903344/-a-control-study-of-artificial-oocyte-activation-in-the-same-period
#11
D Y Hao, R Zhang, X Zhang, C Y Shen, Y Yang, W B Wu, Y L Liu, J Liu, J R Zhang, X L Wang
Objective: To compare the fertility rate and embryo outcome between normal fertilization and the use of Calcium ionophore A23187 on the same period of the same cycle of human ovum for artificial activation. Methods: Patients who conducted the intracytoplasmic sperm injection (ICSI) cycle in vitro fertilization assisted reproductive from January 2015 to December in reproductive center of the Third Affiliated Hospital of Zhengzhou University were enrolled.The protocol of this study was approved by the ethics committee of The Third Affiliated Hospital of Zhengzhou University...
November 22, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27901369/involvement-of-endogenous-central-hydrogen-sulfide-h2s-in-hypoxia-induced-hypothermia-in-spontaneously-hypertensive-rats
#12
João Paulo J Sabino, Renato N Soriano, Alberto F Donatti, Rodrigo Restrepo Fernandez, Marcelo Kwiatkoski, Heloísa D C Francescato, Terezila M Coimbra, Luiz G S Branco
Spontaneously hypertensive rats (SHR) display autonomic imbalance and abnormal body temperature (Tb) adjustments. Hydrogen sulfide (H2S) modulates hypoxia-induced hypothermia, but its role in SHR thermoregulation is unknown. We tested the hypothesis that SHR display peculiar thermoregulatory response to hypoxia and that endogenous H2S overproduced in the caudal nucleus of the solitary tract (NTS) of SHR modulates this response. SHR and Wistar rats were microinjected into the fourth ventricle with aminooxyacetate (AOA, H2S-synthezing enzyme inhibitor) or sodium sulfide (Na2S, H2S donor) and exposed to normoxia (21% inspired O2) or hypoxia (10% inspired O2, 30 min)...
September 6, 2016: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/27888380/kinetin-improves-motility-viability-and-antioxidative-parameters-of-ram-semen-during-storage-at-refrigerator-temperature
#13
Elham Zadeh Hashem, Mohsen Eslami
The present experiment was conducted to evaluate the effect of kinetin on ram semen quality during cold storage. Ejaculates were collected using an artificial vagina from five Qezel rams. Ejaculates which met the criteria (volume of 0.75-2 ml; minimum spermatozoa concentration of 2.5 × 109 spermatozoa/ml and forward progressive motility of 80%), were pooled, diluted with extender without kinetin (control) or enriched with 25 (K 25), 50 (K 50), 100 (K 100) and 200 (K 200) μM kinetin at a final concentration of 500 × 106 spermatozoa per mL...
November 25, 2016: Cell and Tissue Banking
https://www.readbyqxmd.com/read/27878776/successive-chlorothalonil-applications-inhibit-soil-nitrification-and-discrepantly-affect-abundances-of-functional-genes-in-soil-nitrogen-cycling
#14
Ying Teng, Manyun Zhang, Guangmei Yang, Jun Wang, Peter Christie, Yongming Luo
Broad-spectrum fungicide chlorothalonil (CTN) is successively applied into intensive agriculture soil. However, the impacts of successive CTN applications on soil nitrification and related microorganisms remain poorly understood. A microcosm study was conducted to reveal the effects of successive CTN applications on soil nitrification and functional genes involved in soil nitrogen (N) cycling. The CTN at the dosages of 5 mg kg(-1) dry soil (RD) and 25 mg kg(-1) dry soil (5RD) was successively applied into the test soil at 7-day intervals which resulted in the accumulations of CTN residues...
November 23, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27864514/proteomics-and-comparative-genomics-of-nitrososphaera-viennensis-reveal-the-core-genome-and-adaptations-of-archaeal-ammonia-oxidizers
#15
Melina Kerou, Pierre Offre, Luis Valledor, Sophie S Abby, Michael Melcher, Matthias Nagler, Wolfram Weckwerth, Christa Schleper
Ammonia-oxidizing archaea (AOA) are among the most abundant microorganisms and key players in the global nitrogen and carbon cycles. They share a common energy metabolism but represent a heterogeneous group with respect to their environmental distribution and adaptions, growth requirements, and genome contents. We report here the genome and proteome of Nitrososphaera viennensis EN76, the type species of the archaeal class Nitrososphaeria of the phylum Thaumarchaeota encompassing all known AOA. N. viennensis is a soil organism with a 2...
December 6, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27859084/stream-drying-drives-microbial-ammonia-oxidation-and-first-flush-nitrate-export
#16
Stephanie N Merbt, Lorenzo Proia, James I Prosser, Eugènia Martí, Emilio O Casamayor, Daniel von Schiller
Stream microbial communities and associated processes are influenced by environmental fluctuations that may ultimately dictate nutrient export. Discharge fluctuations caused by intermittent stream flow are increasing worldwide in response to global change. We examined the impact of flow cessation and drying on in-stream nitrogen cycling. We determined archaeal (AOA) and bacterial ammonia oxidizer (AOB) abundance and ammonia oxidation activity in surface and deep sediments from different sites along the Fuirosos stream (Spain) subjected to contrasting hydrological conditions (i...
September 2016: Ecology
https://www.readbyqxmd.com/read/27852916/the-2015-aoa-north-american-traveling-fellowship
#17
REVIEW
Addisu Mesfin, Xinning Li, Jonathan F Dickens, Bashar Alolabi, Anna N Miller
The North American Traveling Fellowship (NATF) is one of the flagship tours of the American Orthopaedic Association (AOA). NATF is geared toward advancing the careers of young orthopaedic surgeons through the promotion of clinical, scientific, and social exchange. The 2015 tour had a major emphasis on the development of leadership in the field of orthopaedics through close interactions and meetings with departmental chairs and administrators, as well as with hospital and medical school leaders. The 2015 NATF tour was in the Midwest corridor of Canada and the United States...
November 16, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/27842968/effects-of-earthworms-on-nitrification-and-ammonia-oxidizers-in-vermicomposting-systems-for-recycling-of-fruit-and-vegetable-wastes
#18
Kui Huang, Hui Xia, Guangyu Cui, Fusheng Li
Although it is known that earthworms enrich the nitrate content in their final products, the detailed mechanisms behind this are not well understood, and this is important for determining the agricultural value of vermicomposting. Hence, this study aimed to investigate the effects of earthworms on ammonia oxidization and to clarify the functions of ammonia-oxidizing bacteria and archaea (AOB and AOA) during vermicomposting of fruit and vegetable wastes (FVWs). For this, two dry systems using dry FVWs and a fresh system using fresh FVWs were adopted and compared during 60days of vermicomposting...
February 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27817146/the-response-of-ammonia-oxidizing-microorganisms-to-trace-metals-and-urine-in-two-grassland-soils-in-new-zealand
#19
Pengcheng Wang, Hong J Di, Keith C Cameron, Qiling Tan, Andriy Podolyan, Xiaohu Zhao, Ron G McLaren, Chengxiao Hu
An incubation experiment was conducted to investigate the response of ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA), and the nitrification rate to the contamination of Cu, Zn, and Cd in two New Zealand grassland soils. The soils spiked with different concentrations of Cu (20 and 50 mg kg(-1)), Zn (20 and 50 mg kg(-1)), and Cd (2 and 10 mg kg(-1)) were incubated for 14 days and then treated with 500 mg kg(-1) urine-N before continuing incubation for a total of 115 days. Soils were sampled at intervals throughout the incubation...
November 6, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27809252/millimetre-level-accuracy-gnss-positioning-with-the-blind-adaptive-beamforming-method-in-interference-environments
#20
Saeed Daneshmand, Thyagaraja Marathe, Gérard Lachapelle
The use of antenna arrays in Global Navigation Satellite System (GNSS) applications is gaining significant attention due to its superior capability to suppress both narrowband and wideband interference. However, the phase distortions resulting from array processing may limit the applicability of these methods for high precision applications using carrier phase based positioning techniques. This paper studies the phase distortions occurring with the adaptive blind beamforming method in which satellite angle of arrival (AoA) information is not employed in the optimization problem...
October 31, 2016: Sensors
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