7,136 results match your criteria: "the University of Arizona[Affiliation]"

Three-dimensional convolutional neural network for leak detection and localization in smart water distribution systems.

Water Res X

December 2024

Professor, Department of Civil and Architectural Engineering and Mechanics, The University of Arizona, Tucson, AZ 85721, USA.

Smart meters such as advanced metering infrastructure (AMI) can significantly improve identifying realistic sized leaks in water distribution networks (WDNs). However, to date, detection/localization methods for AMI systems are extremely limited. In this study, to examine the benefits of using AMIs for leak detection within distribution network, a three-dimensional (3D) convolutional neural network (CNN) deep learning (DL) model is proposed that can account for temporally and spatially distributed information of pressures.

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A systematic structure-activity and computational modeling analysis of a series of glucagon-like peptide-1 receptor (GLP-1R) agonists based upon an ultra-short GLP-1 peptide, H-His-Aib-Glu-Gly-Thr-Phe-Thr-Ser-Asp-Bip-Bip-NH2, was conducted. This highly potent 11-mer peptide led to a deeper understanding of the α-helical bias of strategic α-methylation within the linear parent template as well as optimization of GLP-1R agonist potency by 1000-fold. These data were correlated with previously reported co-structures of both full-length GLP-1 analogs and progenitor N-terminal GLP-1 fragment analogs related to such ultra-short GLP-1R agonist peptides.

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Sensitive, rapid and label-free biochemical sensors are needed for many applications. In this protocol, we describe biochemical detection using FLOWER (frequency locked optical whispering evanescent resonator)-a technique that we have used to detect single protein molecules in aqueous solution as well as exosomes, ribosomes and low part-per-trillion concentrations of volatile organic compounds. Whispering gallery mode microtoroid resonators confine light for extended time periods (hundreds of nanoseconds).

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Objectives: Buprenorphine is becoming a key component of prehospital management of opioid use disorder (OUD). It is unclear how many prehospital patients might be eligible for buprenorphine induction, as traditional induction requires that patients first have some degree of opioid withdrawal. The primary aim of this study was to quantify how many patients developed precipitated withdrawal after receiving prehospital naloxone for suspected overdose, as they could be candidates for prehospital buprenorphine.

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Objectives: The Screening, Brief Intervention, and Referral to Treatment (SBIRT) framework is a validated process that is used to identify individuals with substance use disorders (SUDs) and then encourage them to engage in and facilitate entry into treatment. It is not known how well SBIRT can be incorporated into prehospital practice and what barriers to Emergency Medical Services (EMS) implementation of an SBIRT program might arise. The aim of this project was to implement a pilot EMS based SBIRT program.

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Advances in modeling permeability and selectivity of the blood-brain barrier using microfluidics.

Microfluid Nanofluidics

July 2024

Department of Biomedical Engineering, The University of Arizona, 1200 E University Blvd, Tucson 85721, Arizona, USA.

The blood-brain barrier (BBB) protects the brain by actively allowing the entry of ions and nutrients while limiting the passage of from toxins and pathogens. A healthy BBB has low permeability and high selectivity to maintain normal brain functions. Increased BBB permeability can result from neurological diseases and traumatic injuries.

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Research and theory document links between sacrifices and commitment in couples, yet the direction of effects remains unclear. Whereas interdependence theorists suggest that sacrifices help couples to build commitment, other scholars have suggested that being committed leads partners to sacrifice for each other. Nearly all research in this area has focused on men and women in different-gender relationships with each other.

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Although the sensitivity of the circadian system to the characteristics of light (e.g., biological timing, intensity, duration, spectrum) has been well studied in adults, data in early childhood remain limited.

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Evaluation of Swallowing Dysfunction With Flexible Endoscopic Evaluation of Swallowing in the Neonatal Unit.

Am J Speech Lang Pathol

January 2025

Division of Neonatology, Department of Child Health, Phoenix Children's Hospital, Phoenix Campus, The University of Arizona.

Background: Preterm and low-birth-weight infants often experience discoordination of the suck-swallow-breathe pattern, leading to dysrhythmic feeding, inefficient feeding skills, and swallowing dysfunction, increasing the risk of aspiration and respiratory morbidity. While videofluoroscopic swallowing study is commonly utilized to assess swallow function in neonates, flexible endoscopic evaluation of swallowing (FEES) has been an emerging modality and has been utilized routinely at our institution since 2018.

Method: A single-center, retrospective study including 90 infants admitted to the neonatal unit between 2018-2023 who underwent FEES procedure.

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sp. THPS1 is a novel strain isolated from a high-temperature hot spring in Thailand, exhibiting distinctive genomic features that enable adaptation to an extreme environment. This study aimed to characterize the genomic and functional attributes of sp.

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Primary aldosteronism is characterised by the excessive production of aldosterone, which is a key regulator of salt metabolism, and is the most common cause of secondary hypertension. Studies have investigated the association between primary aldosteronism and genetic alterations, with pathogenic mutations being identified. This includes a glycine-to-arginine substitution at position 151 (G151R) of the G protein-activated inward rectifier potassium (K) channel 4 (GIRK4), which is encoded by the gene.

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Click Ordering Lateralization Test: Applicability and feasibility of a new paradigm for assessing sound lateralization behavior.

Int J Pediatr Otorhinolaryngol

January 2025

Department of Physical Therapy, Speech-Language Pathology and Occupational Therapy, Medical School, University of São Paulo, São Paulo, 05360-160, Brazil.

Article Synopsis
  • The study examined a new method for testing how well children can tell the direction of sounds.
  • The Click Ordering Lateralization Test involved two tracks with 54 trials each, where kids identified the side they first heard noise bursts separated by different time intervals.
  • Results showed that the method is reliable, with no significant differences between tracks, and it is suitable for assessing sound lateralization in children aged 8 to 14.
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Medication Therapy Management lifestyle and wellness program for patients in rural Arizona.

J Am Pharm Assoc (2003)

January 2025

Arizona Department of Health Services, Phoenix, AZ, USA. Electronic address:

Background: Pharmacist-provided Medication Therapy Management (MTM) services have demonstrated improved clinical outcomes for patients. MTM services could incorporate additional lifestyle and wellness counseling to potentially enhance healthcare for underserved patients.

Objective: To report the outcomes of a new pharmacist-provided MTM lifestyle and wellness counseling program for underserved rural Arizonans with diabetes and/or hypertension.

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Differential effects of statins on the anti-dyskinetic activity of sub-anesthetic ketamine.

Neurosci Lett

January 2025

Department of Neurology, The University of Arizona, Tucson, AZ 85724, USA; Graduate Interdisciplinary Program in Neuroscience, The University of Arizona, Tucson, AZ 85724, USA; Department of Pharmacology, The University of Arizona, Tucson, AZ 85724, USA. Electronic address:

Sub-anesthetic ketamine has been demonstrated to reduce abnormal involuntary movements (AIMs) in preclinical models of L-DOPA-induced dyskinesia (LID) and retrospective Parkinson's disease (PD) case reports. In this study, we examined the effects on LID of two different statins alone and in combination with ketamine in unilateral 6-hydroxydopamine-lesioned male rats, the standard model for preclinical LID studies. Ketamine attenuated the development of AIMs, while the non-polar lovastatin only showed anti-dyskinetic activity early in the priming period but did not prevent the development of LID, and the polar pravastatin showed no anti-dyskinetic activity.

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Objective: To assess the extent to which the concomitant presence of subclinical myocardial injury or stress and diabetes affects the risk of heart failure (HF) subtypes.

Research Design And Methods: The Jackson Heart Study included Black adults, categorized based on diabetes status, high-sensitivity cardiac troponin I (hs-cTnI), and brain natriuretic peptide (BNP) levels. Subclinical myocardial injury was defined as hs-cTnI ≥4 ng/L in women and ≥6 ng/L in men, and subclinical myocardial stress as BNP ≥35 pg/mL.

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Purpose: Conversational recasting treatment is generally effective. However, different versions of this treatment and different targets may yield different outcomes for children. Here, we directly compare multiple variations of conversational recasting to determine how modifications to delivery and target impact treatment outcomes.

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Plant cuticular waxes serve as highly responsive adaptations to variable environments. Aliphatic waxes consist of very-long-chain (VLC) compounds produced from 1-alcohol- or alkane-forming pathways. The existing variation in 1-alcohols and alkanes across Arabidopsis accessions revealed that 1-alcohol amounts are negatively correlated with aridity factors, whereas alkanes display the opposite behaviour.

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Isolated Neutral Organic Radical Unveiled Solvent-Radical Interaction in Highly Reducing Photocatalysis.

Angew Chem Int Ed Engl

January 2025

The University of Arizona, Chemistry and BioChemistry, 1306 E University Blvd, CSML 638, 85719, Tucson, UNITED STATES OF AMERICA.

Diffusion-limited kinetics is a key mechanistic debate when consecutive photoelectron transfer (conPET) is discussed in photoredox catalysis. In-situ generated organic photoactive radicals can access catalytic systems as reducing as alkaline metals that can activate remarkably stable bonds. However, in many cases, the extremely short-lived transient nature of these doublet state open-shell species has led to debatable mechanistic studies, hindering adoption and development.

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To review current knowledge of the association between bed-sharing and breastfeeding behaviors during infancy. A systematic review methodology was employed following the Preferred Reporting Items for Systematic reviews and Meta-Analyses method and utilizing the Effective Public Health Practice Project Quality Assessment Tool for Quantitative Studies for quality assessment. Inclusion criteria were quantitative or mixed-methods studies published between 1993 and 2022 that provided data on the association between bed-sharing and breastfeeding for postpartum mothers of infants 0-12 months.

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Objectives: Emergency Medical Services (EMS) agencies are beginning to provide low-barrier access to treatment for opioid use disorder (OUD) through the development of EMS buprenorphine (EMS-Bupe) programs. However, evidence-based practices for these programs are lacking. Our aim was to review the current literature on EMS and emergency department (ED) based buprenorphine treatment programs to provide consensus recommendations on the EMS-Bupe program development.

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Discovery of Titin and Its Role in Heart Function and Disease.

Circ Res

January 2025

Department of Integrative Pathophysiology, Medical Faculty Mannheim, DZHK Partnersite Mannheim-Heidelberg, University of Heidelberg, Germany (S.L.).

This review examines the giant elastic protein titin and its critical roles in heart function, both in health and disease, as discovered since its identification nearly 50 years ago. Encoded by the TTN (titin gene), titin has emerged as a major disease locus for cardiac disorders. Functionally, titin acts as a third myofilament type, connecting sarcomeric Z-disks and M-bands, and regulating myocardial passive stiffness and stretch sensing.

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Current dorsal skin flap window chambers with flat glass windows are compatible with optical coherence tomography (OCT) and multiphoton microscopy (MPM) imaging. However, light sheet fluorescence microscopy (LSFM) performs best with a cylindrical or spherical sample located between its two 90° objectives and when all sample materials have the same index of refraction (). A modified window chamber with a domed viewing window made from fluorinated ethylene propylene (FEP), with n similar to water and tissue, was designed.

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