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Related Concept Videos

Cartesian Form for Vector Formulation01:26

Cartesian Form for Vector Formulation

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The Cartesian form for vector formulation is a process to calculate  the moment of force using the position and force vectors. The moment of force is defined as the cross-product of these vectors, making it a vector quantity. The Cartesian form of the position and force vectors involves unit vectors, which can be used to express the cross-product in determinant form.
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Resultant Moment: Vector Formulation01:30

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When a force is applied to an object, the tendency of the object to rotate about a point is known as its moment. If multiple forces are acting on an object, the sum of moments of all the forces acting on a body can be expressed as the resultant moment of the system. The resultant moment can be considered a vector quantity that can be added and subtracted like any other vector.
The resultant moment of a system of forces can be calculated through vector formulation. For example, if we consider...
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Couples: Scalar and Vector Formulation01:21

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One might wonder how the captain of a large ship can navigate through the ocean with just a turn of the steering wheel. The answer lies in the concept of two parallel forces that are equal in magnitude and opposite sense, creating a couple moment.
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Formulating and Validating Nursing Diagnosis I01:26

Formulating and Validating Nursing Diagnosis I

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A nursing diagnosis is written when the nurse recognizes a cluster of essential patient data indicating health problems treated with independent nursing interventions. The standardized terminologies of a nursing diagnosis help nurses identify and treat patients' problems. Every electronic health record that uses nursing diagnosis must employ standard diagnostic terminology. Developing an efficient, individualized care plan begins with accurate nursing diagnoses.
There are thirteen domains...
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Formulating and Validating Nursing Diagnosis II01:25

Formulating and Validating Nursing Diagnosis II

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Nursing diagnoses represent a problem validated by major defining characteristics. There are four categories of nursing diagnoses: problem-focused, risk, health promotion or wellness, and syndrome. The anatomy of a nursing diagnosis includes three components: problem statement or diagnostic label, defining characteristics, and related factors.
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Moment of a Force: Scalar Formulation01:18

Moment of a Force: Scalar Formulation

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The moment of a force, also known as torque, measures the ability of the force to create rotational motion in a body about an axis. It is a vector quantity, meaning it has both magnitude and direction. This concept is used extensively in engineering, physics, and mechanics.
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Improved Fluorescence Methods for High-Throughput Protein Formulation Screening.

Yangjie Wei1,2, Nicholas R Larson1,2, Siva K Angalakurthi1,2

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Summary
This summary is machine-generated.

Protein formulation development requires optimizing storage conditions. This study shows direct optimization under challenging, commercially relevant conditions using fluorescence, improving accuracy over simplified methods for monoclonal antibodies and adjuvanted antigens.

Keywords:
excipient screeninghigh-throughputintrinsic fluorescencemelting temperatureprotein formulation

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Area of Science:

  • Biopharmaceutical formulation
  • Protein characterization
  • Analytical chemistry

Background:

  • Protein formulation development aims for optimal long-term storage conditions.
  • Commercial formulations (high protein concentration, adjuvanted samples) present biophysical characterization challenges.
  • Simplified screening formats may not accurately predict optimal conditions for final commercial formulations.

Purpose of the Study:

  • To develop a workflow for direct formulation optimization under analytically challenging, commercially relevant conditions.
  • To assess the feasibility of a high-throughput fluorescence-based platform for this purpose.
  • To highlight the importance of using relevant conditions in formulation screening.

Main Methods:

  • Utilized a steady-state/lifetime fluorescence-based, high-throughput platform.
  • Investigated a high-concentration monoclonal antibody (mAb) and an Alhydrogel-adjuvanted antigen.
  • Compared formulation screening results from simplified versus commercially relevant conditions.

Main Results:

  • Observed a large discrepancy in screening results between simplified and commercially relevant conditions for both mAb and adjuvanted antigen.
  • Demonstrated the feasibility of direct optimization using the fluorescence plate reader for challenging conditions.
  • Confirmed the importance of performing optimization under conditions that mimic the final commercial formulation.

Conclusions:

  • Steady-state/lifetime fluorescence offers a viable method for direct optimization of challenging protein formulations.
  • Formulation optimization must be conducted under commercially relevant conditions to ensure accurate prediction of stability.
  • This approach improves the identification of optimal conditions for biopharmaceuticals like monoclonal antibodies and adjuvanted antigens.