Publications by authors named "Ron I"

The combination of high energy fractures, extensive soft tissue trauma, and high infection rates in pilon fractures of the distal tibia have long challenged surgeons. Despite the ample evidence, there is no consensus regarding the factors that may influence postoperative infections following surgical management of these fractures. This study aimed to investigate the risk factors for postoperative infections in patients undergoing surgical management for pilon fractures.

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  • Organophosphates (OP) are harmful chemicals used in agriculture and warfare, creating a need for effective detection methods that work quickly and are cost-effective, especially for detecting contamination in liquid samples.
  • Current detection methods are only useful in the short term and fail to address long-term contamination risks, highlighting the need for real-time monitoring of OPs in water and soil.
  • This study introduces a transistor-based sensor called MNChem, capable of ultra-sensitive, quantitative detection of diethyl cyanophosphonate (DCNP) in small liquid samples, achieving a detection limit of 100 fg/mL and a wide dynamic range, suggesting it’s suitable for on-site environmental analysis.*
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  • Transistor-based biosensing (BioFET) is explored as a promising method for future medical diagnostics but faces challenges with solution gating, as standard measurements affect the equilibrium of double layers where biomolecules interact.
  • The study investigates a new BioFET design that separates the solution potential from the current gating process, allowing electrochemical equilibrium to be maintained while measuring biomolecule interactions.
  • Results show that this decoupled approach significantly improves sensing performance for detecting ferritin in diluted plasma, achieving high sensitivity and a wide dynamic range compared to traditional methods.
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Objective: Excessive consumption of added sugars has been linked to the rise in obesity and associated metabolic abnormalities. Non-nutritive sweeteners (NNSs) offer a potential solution to reduce sugar intake, yet their metabolic safety remains debated. This study aimed to systematically assess the long-term metabolic effects of commonly used NNSs under both normal and obesogenic conditions.

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  • - The study focuses on using field-effect meta-nano-channel biosensors (MNC biosensors) to detect N-acetyl-beta-D-glucosaminidase (NAGase), an enzyme linked to infections in milk cows, in very small samples like 0.5 μL drops of milk.
  • - The biosensor achieves highly specific and label-free sensing of NAGase with an impressive detection limit of 30.3 aM, spanning a dynamic range of eleven orders of magnitude, indicating strong linearity and sensitivity.
  • - Two main findings highlight that despite the expected limitations due to the ionic strength and non-specific protein interactions in milk, the sensor works effectively, suggesting more research is needed on how non-specific
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Antibody-antigen interactions are shaped by the solution pH level, ionic strength, and electric fields, if present. In biological field-effect transistors (BioFETs), the interactions take place at the sensing area in which the pH level, ionic strength and electric fields are determined by the Poisson-Boltzmann equation and the boundary conditions at the solid-solution interface and the potential applied at the solution electrode. The present study demonstrates how a BioFET solution electrode potential affects the sensing area double layer pH level, ionic strength, and electric fields and in this way shapes the biological interactions at the sensing area.

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Purpose: Because of the concerns regarding residency process during the pandemic, this study aimed to investigate the volume of clinical interactions of orthopaedic residents at a tertiary hospital by reporting the number of patients treated in the outpatient clinic, inpatient ward, and operating room.

Methods: This retrospective chart study evaluated variables such as volume of clinical interactions of orthopaedic residents at a tertiary hospital by reporting the number of patients treated in the outpatient clinic, inpatient ward, and operating room, from an orthopaedic department in a tertiary trauma center throughout the COVID-19 pandemic era. Comparing these measures was an indirect evaluation tool for measuring the amount of work completed and clinical exposure gained by the residents.

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There is a large debate revolving around the optimal surgical management of hip labral tears. Currently, the literature tends to gravitate toward labral repair as the mainstay of treatment, followed by labral reconstruction when repair is not feasible. Some studies assert that there is no difference between labral repair versus debridement, whereas others support repair.

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Aims: One of the most common complications of pregnancy is gestational diabetes mellitus (GDM), which may result in significant health threats of the mother, fetus and the newborn. Fatty acid-binding protein 4 (FABP4) is an adipokine that regulates glucose homeostasis by promoting glucose production and liver insulin resistance in mouse models. FABP4 levels are increased in GDM and correlates with maternal indices of insulin resistance, with a rapid decline post-partum.

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Background: Transmetatarsal amputation (TMA) is a well-recognized limb-salvage procedure, often indicated for the treatment of diabetic foot infections. Currently, there is no widespread agreement in the literature with regard to the factors associated with failure of TMA. This study aimed to define risk factors for the failure of TMA, defined as below-the-knee or above-the-knee amputation, in patients with diabetes.

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Chemical analysis of hazardous surface contaminations, such as hazardous substances, explosives or illicit drugs, is an essential task in security, environmental and safety applications. This task is mostly based on the collection of particles with swabs, followed by thermal desorption into a vapor analyzer, usually a detector based on ion mobility spectrometry (IMS). While this methodology is well established for several civil applications, such as border control, it is still not efficient enough for various conditions, as in sampling rough and porous surfaces.

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We developed and optimized surface-enhanced Raman spectrometry (SERS) methods for trace analysis of explosive vapour and particles using a hand-held Raman spectrometer in the field. At first, limits of detection (LODs) using SERS methods based on a colloidal suspension of gold nanoparticles were measured under alkaline conditions and are as follows: pentaerythritol tetranitrate (PETN) (1.5 × 10 M, 6.

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Biologically-modified field-effect transistors (BioFETs) are promising platforms for specific and label-free biosensing due to their sub-micron footprint suitable for multiplexing in ultra-small samples, low noise levels, inherent amplification, . Debye screening length is a well-recognized challenge for any BioFET-based technology. The screening length is the smallest at the double layer, where the solution ion population is higher than the bulk population.

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Aims/hypothesis: Fatty acid-binding protein 4 (FABP4) is an adipokine with a key regulatory role in glucose and lipid metabolism. We prospectively evaluated the role of FABP4 in the pathophysiology of diabetic ketoacidosis (DKA) in new-onset type 1 diabetes.

Methods: Clinical and laboratory data were prospectively collected from consecutive children presenting with new-onset type 1 diabetes.

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During pregnancy, fetal glucose production is suppressed, with rapid activation immediately postpartum. Fatty acid-binding protein 4 (FABP4) was recently demonstrated as a regulator of hepatic glucose production and systemic metabolism in animal models. Here, we studied the role of FABP4 in regulating neonatal glucose hemostasis.

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Background: The preferred primary treatment of toe osteomyelitis in diabetic patients is controversial. We compared the outcome of primary nonoperative antibiotic treatment versus digital amputation in patients with diabetes-related chronic digital osteomyelitis.

Methods: We conducted a retrospective medical record review of patients treated for digital osteomyelitis at a single center.

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Sampling hazardous compounds in the form of solids and liquids is a growing need in the fields of homeland security and forensics. Chemical analysis of particles and droplets under field conditions is crucial for various tasks carried out by counter-terrorism and law enforcement units. The use of simple, small and low cost means to achieve this goal is constantly pursued.

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Endoplasmic reticulum stress (ERS) has a pathophysiological role in obesity-associated insulin resistance. Yet, the coordinated tissue response to ERS remains unclear. Increased connexin 43 (Cx43)-mediated intercellular communication has been implicated in tissue-adaptive and -maladaptive response to various chronic stresses.

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A sensitive surface-enhanced Raman spectroscopy (SERS) substrate was developed to enable hand-held Raman spectrometers to detect gas-phase VX and HD. The substrate comprised Au nanoparticles modified onto quartz fibres. Limits of detection (LOD) of 0.

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Efficient and safe detection of Bacillus anthracis spores (BAS) is a challenging task especially in bio-terror scenarios where the agent is concealed. We provide a proof-of-concept for the identification of concealed BAS inside mail envelopes using short-wave infrared hyperspectral imaging (SWIR-HSI). The spores and two other benign materials are identified according to their typical absorption spectrum.

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Great efforts are being made to develop new rapid antibiotic susceptibility tests to meet the demand for clinical relevance versus disease progression. This is important especially in diseases caused by bacteria such as , the causative agent of plague, which grows rapidly but relatively slow . This compromises the ability to use standard growth-based susceptibility tests to obtain rapid and proper antibiotic treatment guidance.

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The short-chain fatty acid propionate is a potent inhibitor of molds that is widely used as a food preservative and endogenously produced by gut microbiota. Although generally recognized as safe by the U.S.

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Background: Radiotherapy is one of the main treatments for malignancies. Radioresistance is a major obstacle in this treatment, calling for new treatments to improve radiotherapy outcome. Herbal medicine has low toxicity and could be a source for new radio-enhancing agents.

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Background: Radiotherapy is one of the primary therapies for localized prostatic carcinoma. Therefore, there is an emerging need to sensitize prostatic cancer cells to chemotherapy/radiotherapy. Modified citrus pectin (MCP) is an effective inhibitor of galectin-3 (Gal-3), which is correlated with tumor progression, proliferation, angiogenesis, and apoptosis.

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