Publications by authors named "Calvin"

Worrying about perceived threats is a hallmark of multiple psychological disorders including anxiety. This concern about future events is particularly important when an individual is faced with an approach-avoidance conflict. Potential goals to approach are known to be represented in the dorsal hippocampus during theta cycles.

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BACKGROUND The bacterial organism Capnocytophaga canimorsus is an oral commensal of cats and dogs and can cause life-threatening infections like mycotic aneurysm, meningitis, and sepsis. Mycotic aneurysms occur when microbial infections cause arterial wall degeneration. Difficulty in diagnosing Capnocytophaga canimorsus infection can occur due to the bacteria's fastidious nature and laboratory testing limitations, contributing to the infection's high morbidity and mortality.

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Background: Glioblastoma (GBM) is an aggressive primary brain tumor with a poor prognosis. The current gold standard for GBM treatment, known as the Stupp protocol, includes maximal safe surgical resection followed by radiotherapy and temozolomide chemotherapy. Despite extending survival modestly, this regimen is associated with significant side effects and limited efficacy, resulting in a median survival (MS) of 15 months and a 5-year survival rate of only 7%.

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Polymers can be used to augment the properties of microporous materials, affording enhanced processability, stability, and compatibility. Manipulating polymers to target specific properties, however, requires detailed knowledge of how different polymers and microporous materials interact. Here, we report a study of the thermodynamics of polyethylene glycol (PEG) intrusion into a representative hydrophobic zeolite (silicalite-1) and metal-organic framework [ZIF-67; Co(2-methylimidazolate)] in water, both of which can be formed into colloidally stable aqueous dispersions─termed "microporous water"─with dry, guest-accessible pore networks.

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Base editors create precise genomic edits by directing nucleobase deamination or removal without inducing double-stranded DNA breaks. However, a vast chemical space of other DNA modifications remains to be explored for genome editing. Here, we harness the bacterial anti-phage toxin DarT2 to append ADP-ribosyl moieties to DNA, unlocking distinct editing outcomes in bacteria versus eukaryotes.

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Background: Chronic synovitis due to chronic knee gouty arthritis (KGA) resulting in synovial hyperplasia has not been documented in the current literature, and thus the optimal management for this condition remains unclear. This case report discusses a 34-year-old man with a history of chronic KGA who presented with recurrent knee effusion resulting from synovial hyperplasia.

Case Summary: A 34-year-old man presented to our outpatient clinic with a 5-year recurrent knee effusion and a history of chronic KGA.

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Background: The long-term neuro-ophthalmic outcomes after carotid intervention in patients presenting with preoperative visual symptoms vary widely based on the underlying etiology of retinal ischemia and are not well understood.

Methods: We performed a retrospective review of consecutive patients presenting with retinal ischemia who subsequently underwent carotid intervention from January 2018 to December 2022. Patients were classified into three groups (group I: amaurosis fugax/vascular transient monocular vision loss, group II: ocular ischemic syndrome [OIS], and group III: central/branch retinal artery occlusion).

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  • * After receiving emergency radiotherapy, she was unable to return for scheduled surgery due to a COVID-19 hospitalization and later returned with lung metastasis leading to a hysterectomy and lymphadenectomy.
  • * Sadly, despite the surgery, she passed away four weeks later due to worsening lung metastases, highlighting the aggressive nature and poor prognosis of NECE, which calls for a clinical trial to create treatment guidelines.
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Acute thrombosis of the aorta is an uncommon, but potentially devastating, vascular emergency. The absence of pathognomonic signs or symptoms makes the diagnosis challenging and, often, time consuming. No optimal treatment has been established, with greater challenge present when the thrombus involves the mesenteric-renal vessels.

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  • The study presents a new type of laser-driven electron source that can deliver extremely high radiation doses (Gy-scale) in very short timeframes (10-20 picoseconds).
  • This source achieves remarkable dose rates between 10^{10} and 10^{12} Gy/s, allowing for consistent and uniform dose delivery over larger areas (cm-scale).
  • These findings suggest the potential of using this technology for detailed research on how biological cells respond to rapid, high-dose radiation.
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  • - The diamondback moth (Plutella xylostella) is a major pest affecting Brassica crops like broccoli and cauliflower, with outbreaks occurring in Arizona since October 2016.
  • - Research from 2016 to 2021 involved collecting 19 P. xylostella populations from various locations to assess their resistance to four insecticides, revealing that most were effective except chlorantraniliprole, which failed at field rates.
  • - The study found significant resistance levels in the moth populations from transplanted crops but indicated that resistance was not consistent or lasting in those from direct-seeded broccoli, suggesting ongoing risks of resistance in Arizona's vegetable-growing regions.
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Background: The COVID-19 pandemic highlighted the need for timely, evidence-based rapid risk assessments (RRA) of infectious disease events to inform public health action during rapidly evolving situations with high uncertainty. In 2022, the Public Health Agency of Canada established a coordinated approach to public health risk assessment, including a methodology for qualitative RRA of infectious disease threats.

Objective: To describe the RRA methodology and illustrate its use with examples from different infectious hazards of public health concern.

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Primary intraosseous squamous cell carcinoma (PIOSCC) is a rare malignant tumor originating from remnants of odontogenic epithelium within the central jaw bone. The majority of the PIOSCC cases are diagnosed incidentally on histological findings while a potential malignancy wasn't necessarily determined at first on initial investigations. The diagnosis of PIOSCC is challenging and relies on ruling out other types of carcinomas, including metastatic tumors from other primary sites.

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The fear of cancer recurrence is an important topic in the healthcare field. In general, approximately 40% of survivors experience high levels of fear of recurrence. This study aims to fill this gap by synthesizing the findings of systematic reviews studies investigating ecosystems, correlates or predictors, and barriers and facilitators of fear of cancer recurrence among cancer survivors.

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Purpose: The duration for which anterior cruciate ligament reconstruction (ACLR) can be delayed without resulting in a risk of subsequent meniscus injury has remained a debatable topic. The main purpose of this study was to determine the safest delay interval for a delayed ACLR.

Methods: This retrospective study included all patients who underwent ACLR between January 2020 and January 2022.

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As synthesized, nanocrystal surfaces are typically covered in coordinating organic ligands, and the degree of packing and order of these ligands are ongoing questions in the field of colloidal nanocrystals, particularly in the solution state. Recently, isothermal titration calorimetry coupled with H NMR has been used to probe ligand exchanges on colloidal quantum dots, revealing the importance of the composition of the ligand shell on exchange thermodynamics. Previous work has shown that the geometry and length of a ligand's aliphatic chain can influence the thermodynamics of exchange.

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  • Rural community practices in the U.S. are increasingly involved in medical education and are encouraged to give academic appointments to non-academic physicians.
  • A formal education committee was established in a rural regional practice to facilitate the adoption of academic ranks through various administrative changes over three years.
  • As a result, the percentage of physicians with academic rank rose significantly from 41.1% to 92.8%, demonstrating that process changes can effectively enhance academic appointments, improve educational programs, and boost physician satisfaction and retention.
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  • Volar distal radioulnar joint (DRUJ) dislocation with an isolated ulnar styloid fracture is rare and often misdiagnosed, leading to delayed treatment and potential loss of function.
  • A 51-year-old woman was treated for a neglected volar DRUJ dislocation and ulnar styloid fracture after an initial misdiagnosis as a wrist sprain; surgery involved open reduction and stabilization techniques.
  • The report emphasizes the importance of evaluating the triangular fibrocartilage complex during surgery for long-term stabilization, suggesting that radioulnar K-wire stabilization along with tissue repair can lead to positive clinical results.
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We investigate the early stages of cesium lead bromide perovskite formation through absorption spectroscopy of stopped-flow reactions, high-throughput mapping, and direct synthesis and titration of potential precursor species. Calorimetric and spectroscopic measurements of lead bromide complex titrations combined with theoretical calculations suggest that bromide complexes with higher coordination numbers than previously considered for nonpolar systems can better explain observed behaviors. Synthesis mapping of binary lead halides reveals multiple lead bromide species with absorption peaks higher than 300 nm, including a previously observed species with a peak at 313 nm and two species with peaks at 345 and 370 nm that also appear as reaction intermediates during the formation of lead bromide perovskites.

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Cardiovascular disease (CVD) is the leading cause of mortality in the world. From 2005 to 2008, the World Health Organization (WHO) planned an initiative to reduce the mortality rate of CVD by 2030 by addressing health, finance, transport, education, and agriculture in these communities. Plans were underway by many countries to meet the goals of the WHO initiative.

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The research aims to evaluate the source, dispersion, and human health risk assessment of PAH-contaminated Talinum Triangulare grown along the polluted Ikpoba River. The freeze-dried vegetables were sonicated with dichloromethane for an hour and then concentrated using a rotary evaporator. The extract was purified using a glass column with anhydrous NaSO and silica gel and analyzed using gas chromatography-mass spectrometry (GC-MS).

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  • Acoustic shadowing can interfere with Doppler assessments in prosthetic heart valves (PHVs), which might hide issues like mitral regurgitation (MR).
  • Spectral Doppler is a key technique for identifying prosthetic mitral regurgitation.
  • Transesophageal echocardiography (TEE) can enhance the evaluation when transthoracic echocardiography (TTE) is limited, helping to reduce interference from acoustic shadowing and reverberations.
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Ambulatory management of congestive heart failure (HF) continues to be a challenging clinical problem. Recent studies have focused on the role of HF clinics, nurse practitioners and disease management programmes to reduce HF readmissions. This pilot study is a pragmatic factorial study comparing a coach intervention, a SMARTPHONE REMINDER system intervention and BOTH interventions combined to Treatment as USUAL (TAU).

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Background: Many studies reporting neonatal outcomes in birth centers include births with risk factors not acceptable for birth center care using the evidence-based CABC criteria. Accurate comparisons of outcomes by birth setting for low-risk patients are needed.

Methods: Data from the public Natality Detailed File from 2018 to 2021 were used.

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The greenhouse gas (GHG) emissions inventories in our context result from the production of electricity from fuel oil at the Mbalmayo thermal power plant between 2016 and 2020. Our study area is located in the Central Cameroon region. The empirical method of the second level of industrialisation was applied to estimate GHG emissions and the application of the genetic algorithm-Gaussian (GA-Gaussian) coupling method was used to optimise the estimation of GHG emissions.

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