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Related Concept Videos

Equivalent Circuits for Practical Transformers01:28

Equivalent Circuits for Practical Transformers

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The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
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Characteristics of Practical Op Amps01:16

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A difference amplifier, a crucial component in numerous electronic devices, ideally amplifies only the difference-mode signal, which is the difference between two input signals. However, in practical circuits, the output voltage depends on both the differential gain and the common-mode gain.
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Theories play an essential role in organizing patient care. Theories refer to a proposed or followed belief, policy, or procedure that is the basis for action. Nursing theories are knowledge-based concepts that guide nurses' actions, influence nursing education and practice, and allow nurses to care for their patients.
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Bacterial Transformation01:33

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In 1928, bacteriologist Frederick Griffith worked on a vaccine for pneumonia, which is caused by Streptococcus pneumoniae bacteria. Griffith studied two pneumonia strains in mice: one pathogenic and one non-pathogenic. Only the pathogenic strain killed host mice.
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Bacterial Signaling01:30

Bacterial Signaling

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Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
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Chronic Pharyngitis01:23

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Chronic pharyngitis refers to persistent inflammation of the pharyngial mucosa.
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Dealing with Chronic Non-Bacterial Osteomyelitis: a practical approach.

Andrea Taddio1,2, Giovanna Ferrara3, Antonella Insalaco4

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Chronic Non-Bacterial Osteomyelitis (CNO) is a rare inflammatory bone disorder in children. This review offers clinical guidance for diagnosis and treatment when established guidelines are lacking.

Keywords:
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Area of Science:

  • Pediatric Rheumatology
  • Pediatric Orthopedics
  • Pediatric Inflammation

Background:

  • Chronic Non-Bacterial Osteomyelitis (CNO) is a rare inflammatory bone disorder predominantly affecting children.
  • Its rarity and lack of established diagnostic and therapeutic guidelines present clinical challenges.
  • Recent research suggests a role for cytokines like IL-1β and IL-10, potentially classifying CNO as an autoinflammatory disease.

Purpose of the Study:

  • To provide practical suggestions for managing CNO in daily clinical practice.
  • To highlight key diagnostic features and therapeutic considerations for CNO.
  • To address the diagnostic and therapeutic gaps in CNO management.

Main Methods:

  • Review of clinical characteristics, pathogenesis, and diagnostic approaches for CNO.
  • Discussion of differential diagnoses including infections, malignancies, and other autoinflammatory disorders.
  • Analysis of current and emerging treatment strategies, including NSAIDs, corticosteroids, and biologics.

Main Results:

  • CNO presents with insidious bone pain, swelling, and sometimes systemic symptoms; multifocal lesions and characteristic imaging are highly suggestive.
  • Radiological findings from MRI or CT can be diagnostic, potentially obviating bone biopsy in select cases.
  • Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) are first-line treatment, with other agents used for refractory cases.

Conclusions:

  • CNO diagnosis and treatment lack consensus, posing significant clinical hurdles.
  • Multifocal bone lesions with characteristic imaging strongly suggest CNO.
  • Further research is needed to establish optimal second-line treatments following NSAID failure.