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45 results for “refilling”
Xylem Embolism Formation, Refilling and Water Storage in Tree Trunks at Harvard Forest 2012
Trunks of large trees play an important role in whole-plant water balance but technical difficulties have limited most hydraulic research to small stems, leaves and roots. To investigate the dynamics of water-related processes in tree trunks, such as winter embolism refilling, xylem hydraulic vulnerability, and water storage, volumetric water content (VWC) in the main stem was monitored continuously using frequency domain moisture sensors in adult Betula papyrifera trees from early spring through the beginning of winter. An air injection technique was developed to estimate hydraulic vulnerability of the trunk xylem. Trunk VWC increased in early spring and again in autumn concurrent with root pressure during both seasons. Diurnal fluctuations and a gradual decrease in trunk VWC through the growing season were observed, which, in combination with VWC increase after significant rainfall events and depletion during periods of high water demand, indicate the importance of stem water storage in both short-and long-term water balance. Comparisons between the trunk air injection results and conventional branch hydraulic vulnerability curves showed no evidence of “vulnerability segmentation” between the main stem and small branches in B. papyrifera. Measurements of VWC following air injection, together with evidences from air injection and xylem dye perfusion, indicate that embolized vessels can be refilled by active root pressure but not in the absence of root pressure. The precise, continuous and non-destructive measurement of wood water content using frequency domain sensors provides an ideal way to probe many hydraulic processes in large tree trunks that are otherwise difficult to investigate.
Offering ART refill through community health workers versus clinic-based follow-up after home-based same-day ART initiation in rural Lesotho: The VIBRA cluster-randomised clinical trial
<p>These are pseudo-anonymised data from the VIBRA randomized trial: "Offering ART refill through community health workers versus clinic-based follow-up after home-based same-day ART initiation in rural Lesotho: The VIBRA cluster-randomised clinical trial". The data dictionary explains the data available in the dataset. Between August 2018 and May 2019, 257 eligible individuals from 117 consenting villages were enrolled from two districts of Lesotho, and followed up for a maximum of 15 months. The protocol was published, doi: 10.1186/s13063-019-3510-5</p>
Effects of flavoring compounds used in electronic cigarette refill liquids on endothelial and vascular function
<p>raw data of all figures and tables</p>
Clinical Predictors of Capillary Refill Time and Their Association With Triage Categories
ClinicalTrials.gov study NCT07054151. IPD Sharing: YES. Countries: 1. Publications: 15.
Peer-Educator-coordinated vs Nurse-coordinated ART Refill for Adolescents and Young Adults Living With HIV in Lesotho
ClinicalTrials.gov study NCT03969030. IPD Sharing: YES. Countries: 1. Publications: 3.
Data from: Plasma refilling of the lunar wake: Plasma-vacuum interactions, electrostatic shocks, and electromagnetic instabilities
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Capillary Refill Index with Rewarming
ClinicalTrials.gov study NCT04366310. IPD Sharing: NO. Countries: 1. Publications: 11.
Usefulness of Capillary Refill Time and Skin Mottling Score to Predict Intensive Care Unit Admission
ClinicalTrials.gov study NCT03831022. IPD Sharing: UNDECIDED. Countries: 1. Publications: 9.
Vasopressor Support, Mean Arterial Pressure and Capillary Refill Time in Critically Ill Patients
ClinicalTrials.gov study NCT05674084. IPD Sharing: NO. Countries: 1. Publications: 4.
Pharmacist Management of Attention Deficit Hyperactivity Disorder Medication Refill Requests
ClinicalTrials.gov study NCT06388694. IPD Sharing: NO. Countries: 1. Publications: 1.
Hemodynamic Phenotype and Capillary Refill Time-targeted Resuscitation Strategy
ClinicalTrials.gov study NCT05057611. IPD Sharing: NO. Countries: 1. Publications: 3.
Can Capillary Refill Time Variation During Passive Leg Raising Predict Fluid Responsiveness
ClinicalTrials.gov study NCT02248025. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Capillary Refill Time Response to a Rapid Fluid Challenge in Septic Shock Patients
ClinicalTrials.gov study NCT04693923. IPD Sharing: YES. Countries: 1. Publications: 70.
DiCART TM Device for Capillary Refill Time Measurement
ClinicalTrials.gov study NCT04538612. IPD Sharing: UNDECIDED. Countries: 1. Publications: 1.
Effects of Norepinephrine and Volume Expansion in Capillary Refill Time in Septic Shock
ClinicalTrials.gov study NCT04870892. IPD Sharing: UNDECIDED. Countries: 1. Publications: 1.
Effects of Fluid Resuscitation on Capillary Refilling Time and Organ Functions in Septic Shock
ClinicalTrials.gov study NCT06067516. IPD Sharing: UNDECIDED. Countries: 1. Publications: 4.
Data from: An inconvenient truth about xylem resistance to embolism in the model species for refilling Laurus nobilis L.
Direct, non-invasive X-ray microtomography and optical technique observations applied in stems and leaves of intact seedlings revealed that laurel is highly resistant to drought-induced xylem embolism. Contrary to what has been brought forward, daily cycles of embolism formation and refilling are unlikely to occur in this species and to explain how it copes with drought. There has been considerable controversy regarding xylem embolism resistance for long-vesselled angiosperm species and particularly for the model species for refilling (Laurus nobilis L.). The purpose of this study was to resolve the hydraulic properties of this species by documenting vulnerability curves of different organs in intact plants. Here, we applied a direct, non-invasive method to visualize xylem embolism in stems and leaves of intact laurel seedlings up to 2-m tall using X-ray microtomography (microCT) observations and the optical vulnerability technique. These approaches were coupled with complementary centrifugation measurements performed on 1-m long branches sampled from adult trees and compared with additional microCT analyses carried out on 80-cm cut branches. Direct observations of embolism spread during desiccation of intact laurels revealed that 50% loss of xylem conductivity (Ψ50) was reached at − 7.9 ± 0.5 and − 8.4 ± 0.3 MPa in stems and leaves, respectively, while the minimum xylem water potentials measured in the field were − 4.2 MPa during a moderate drought season. Those findings reveal that embolism formation is not routine in Laurus nobilis contrary to what has been previously reported. These Ψ50 values were close to those based on the flow-centrifuge technique (− 9.2 ± 0.2 MPa), but at odds with microCT observations of cut branches (− 4.0 ± 0.5 MPa). In summary, independent methods converge toward the same conclusion that laurel is highly resistant to xylem embolism regardless its development stage. Under typical growth conditions without extreme drought events, this species maintains positive hydraulic safety margin, while daily cycles of embolism formation and refilling are unlikely to occur in this species.
Evaluation of Capillary Refill Index
ClinicalTrials.gov study NCT04144166. IPD Sharing: NO. Countries: 1. Publications: 0.
Capillary Refill Time Measurement Utilizing Mobile Application in Children
ClinicalTrials.gov study NCT05472116. IPD Sharing: NO. Countries: 1. Publications: 0.
Data from: An inconvenient truth about xylem resistance to embolism in the model species for refilling Laurus nobilis L.
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