408 research outputs found
Estimating the global root exudate carbon flux
Get PDFRoot exudation, the export of low-molecular weight organic carbon (C) from living plant roots to soil, influences microbial activity, nutrient availability, and ecosystem feedbacks to climate change, but the magnitude of this C flux at ecosystem and global scales is largely unknown. Here, we synthesize in situ measurements of root exudation rates and couple those to estimates of fine root biomass to estimate global and biome-level root exudate C fluxes. We estimate a global root exudate flux of 13.4 (10.1–20.2) Pg C y−1, or about 9% (7–14%) of global annual gross primary productivity. We did not find differences in root mass-specific exudation rates among biomes, though total exudate fluxes are estimated to be greatest in grasslands owing to their high density of absorptive root biomass. Our synthesis highlights the global importance of root exudates in the terrestrial C cycle and identifies regions where more in situ measurements are needed to improve future estimates of root exudate C fluxes
Volume 09
Get PDFIntroduction Dr. Roger A. Byrne
Islamic Radicalization of Women in The United Kingdom by Mackenzie Adamson
Harmony by Chad Benton
The Rhetoric of Distrust: A Dangerous Game During the 2016 Presidential Campaign by Garrett Badgley
Neither Man nor Monster: Frankenstein\u27s Creature as Posthuman by Anna Bultrowicz
Holisticrx by Kelsey Daniel
Reality Bytes: Identity in the Virtual World of Ernest Cline\u27s Ready Player One by Taylor Embrey
Animation by Jose Romero
Sue Klebold\u27s a Mother\u27s Reckoning: A Call to Action for Mental Health Advocacy by Taylor Hughes
Hillary Clinton\u27s Rhetoric of Gender Inequality: The Past, the Present, nd the (Hypothetical) Future by Haley Klepatzki
Against the Grain: Eat Gluten Free by Emily Spittle
Following Judith: A Midrashic Approach to the Book of Judith by Kelsey Longnaker
Identity and Dialect Adaptation: The Effect of Geography and Community on Dialect by Alexis Paige Manuel
These are the Gardens Of The Desert : The Revolutionary Impact Of Bryant\u27s The Prairies on American Literature by Montana Nelson
Beauty is Pain: Eating Disorders, Gender, and the Lies We Feed Young Women By Faith Shelton
Be a Man: The Eradication of Gender in Y: The Last Man by Joseph Stearman
A Computational Study of Molecular Electronics: The Role of Molecular Structure by John Brumfield
The Importance of Voting by Monica Mcgraw
Method for The Detection and Removal of Antibiotics in Bottled Water by Jayden Metzger
Small Chimp Print by Maddie Smith
Mental Health Impairments in Rural Communities by Lyndsey Swinhart
F@#* That: The Effects of Swearing and Influence of Authority on Stress Level by Amanda N. Chappell And Haley C. Moore
Friend or Faux? Prosocial and Antisocial Social Media Use and Personality Traits by Samantha Burgess, Heather Dunbar, Briana Hackett, Jackie Mcmillion, Kiana Simpkins, And Ta\u27miya Vanhook-Davis
There\u27s Someone in My Head but It’s Not Me : Attitudes About Diagnosis and Treatment of Psychological Disorders by Kiana Simpkins, Lindsey Sparrock, And Leonie Verstraete
Efflorescent Bonds by Kristen Melton
Shower Thoughts by Ryan Bultrowic
Fiber Type Conversion by PGC-1α Activates Lysosomal and Autophagosomal Biogenesis in Both Unaffected and Pompe Skeletal Muscle
Get PDFPGC-1α is a transcriptional co-activator that plays a central role in the regulation of energy metabolism. Our interest in this protein was driven by its ability to promote muscle remodeling. Conversion from fast glycolytic to slow oxidative fibers seemed a promising therapeutic approach in Pompe disease, a severe myopathy caused by deficiency of the lysosomal enzyme acid alpha-glucosidase (GAA) which is responsible for the degradation of glycogen. The recently approved enzyme replacement therapy (ERT) has only a partial effect in skeletal muscle. In our Pompe mouse model (KO), the poor muscle response is seen in fast but not in slow muscle and is associated with massive accumulation of autophagic debris and ineffective autophagy. In an attempt to turn the therapy-resistant fibers into fibers amenable to therapy, we made transgenic KO mice expressing PGC-1α in muscle (tgKO). The successful switch from fast to slow fibers prevented the formation of autophagic buildup in the converted fibers, but PGC-1α failed to improve the clearance of glycogen by ERT. This outcome is likely explained by an unexpected dramatic increase in muscle glycogen load to levels much closer to those observed in patients, in particular infants, with the disease. We have also found a remarkable rise in the number of lysosomes and autophagosomes in the tgKO compared to the KO. These data point to the role of PGC-1α in muscle glucose metabolism and its possible role as a master regulator for organelle biogenesis - not only for mitochondria but also for lysosomes and autophagosomes. These findings may have implications for therapy of lysosomal diseases and other disorders with altered autophagy
Measurement of Dijet Angular Distributions at CDF
Get PDFWe have used 106 pb^-1 of data collected in proton-antiproton collisions at
sqrt(s)=1.8 TeV by the Collider Detector at Fermilab to measure jet angular
distributions in events with two jets in the final state. The angular
distributions agree with next to leading order (NLO) predictions of Quantum
Chromodynamics (QCD) in all dijet invariant mass regions. The data exclude at
95% confidence level (CL) a model of quark substructure in which only up and
down quarks are composite and the contact interaction scale is Lambda_ud(+) <
1.6 TeV or Lambda_ud(-) < 1.4 TeV. For a model in which all quarks are
composite the excluded regions are Lambda(+) < 1.8 TeV and Lambda(-) < 1. 6
TeV.Comment: 16 pages, 2 figures, 2 tables, LaTex, using epsf.sty. Submitted to
Physical Review Letters on September 17, 1996. Postscript file of full paper
available at http://www-cdf.fnal.gov/physics/pub96/cdf3773_dijet_angle_prl.p
Search for charged Higgs decays of the top quark using hadronic tau decays
Full text linkWe present the result of a search for charged Higgs decays of the top quark,
produced in collisions at 1.8 TeV. When the charged
Higgs is heavy and decays to a tau lepton, which subsequently decays
hadronically, the resulting events have a unique signature: large missing
transverse energy and the low-charged-multiplicity tau. Data collected in the
period 1992-1993 at the Collider Detector at Fermilab, corresponding to
18.70.7~pb, exclude new regions of combined top quark and charged
Higgs mass, in extensions to the standard model with two Higgs doublets.Comment: uuencoded, gzipped tar file of LaTeX and 6 Postscript figures; 11 pp;
submitted to Phys. Rev.
Inclusive jet cross section in collisions at TeV
Full text linkThe inclusive jet differential cross section has been measured for jet
transverse energies, , from 15 to 440 GeV, in the pseudorapidity region
0.10.7. The results are based on 19.5 pb of data
collected by the CDF collaboration at the Fermilab Tevatron collider. The data
are compared with QCD predictions for various sets of parton distribution
functions. The cross section for jets with GeV is significantly
higher than current predictions based on O() perturbative QCD
calculations. Various possible explanations for the high- excess are
discussed.Comment: 8 pages with 2 eps uu-encoded figures Submitted to Physical Review
Letter
Comparison of placental growth factor and fetal flow Doppler ultrasonography to identify fetal adverse outcomes in women with hypertensive disorders of pregnancy: an observational study.
Get PDFBACKGROUND: Hypertensive disorders of pregnancy and intrauterine growth restriction (IUGR) are leading causes of maternal and perinatal morbidity and mortality. Failure to detect intrauterine growth restriction in women at high risk has been highlighted as a significant avoidable cause of serious fetal outcome. In this observational study we compare fetal flow using Doppler ultrasonography with a new test for placental growth factor (PlGF) to predict fetal adverse events. METHODS: Eighty-nine women with hypertensive disorders of pregnancy (24 with chronic hypertension, 17 with gestational hypertension, 12 with HELLP syndrome, 19 with preeclampsia and 17 with superimposed preeclampsia) were enrolled. A single maternal blood sample to measure free PlGF (Alere Triage) taken before 35 weeks of pregnancy was compared to the last Doppler ultrasound measurement of fetal flow before delivery. PlGF was classified as normal (PlGF>/=100 pg/ml), low (12<PlGF<100) or very low (PlGF</=12 pg/ml). A positive test for abnormal fetal flow was defined as either signs of centralisation of the fetal circulation or diastolic block or reverse flow in the umbilical artery or descending aorta; this was a criterion for delivery. Fetal outcomes were intrauterine growth restriction and birth before 37 weeks of pregnancy. RESULTS: In total 61/89 women had a preterm birth and 22 infants had IUGR. Of those who delivered preterm, 20/20 women with abnormal fetal flow and 36/41 (87.8%) women with normal fetal flow had low or very low PlGF. Of those infants with IUGR, 22/22 had low or very low maternal PlGF and 10/22 had abnormal fetal flow. CONCLUSIONS: PlGF may provide useful information before 35th gestational week to identify fetuses requiring urgent delivery, and those at risk of later adverse outcomes not identified by fetal flow Doppler ultrasonography
Search for New Particles Decaying to Dijets at CDF
Get PDFWe have used 106 pb^-1 of data collected with the Collider Detector at
Fermilab to search for new particles decaying to dijets. We exclude at the 95%
confidence level models containing the following new particles: axigluons and
flavor universal colorons with mass between 200 and 980 GeV/c, excited quarks
with mass between 80 and 570 GeV/c^2 and between 580 and 760 GeV/c^2, color
octet technirhos with mass between 260 and 480 GeV/c^2, W' bosons with mass
between 300 and 420 GeV/c^2, and E_6 diquarks with mass between 290 and 420
GeV/c^2.Comment: 18 pages, 4 figures, 1 table. Submitted to Physical Review D Rapid
Communications. Postscript file of paper is also available at
http://www-cdf.fnal.gov/physics/pub97/cdf3276_dijet_search_prd_rc.p
‘Now, where were we?’ The highs and lows of hunting data with a research pack
Get PDFThe boundaries of the social have been stretched by recent scholarship in sociological animal studies. Empirical work has begun to open up to the presence of the myriad other creatures that make up social worlds. Yet much of this research relies on standard practices and human-centred methods. This paper reflects on a piece of research characterised by such contradiction drawn from a project investigating everyday lives with canine companions via observation and interviewing. What was methodologically distinctive, was that the majority of interviews involved dogs being present and most were undertaking while walking with dogs. An ethnographic diary was also kept in one field site mapping events, interactions and routines of dogs, humans and others in the space of ‘dog walking’. How might non-humans intervene in data collection and be reflected in the data? What is lost and gained by researching (literally) in the field with a multi-species research pack
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