Trapezoidal Method
Trapezoidal Method - Related Videos
01:29
Methods of Sterilization I: Physical Methods
0 Views •
2025
As used in a healthcare facility, sterilization destroys all microorganisms through physical or chemical methods. The physical method includes steam, dry heat, boiling water, and radiation. Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
03:50
The Scientific Method
0 Views •
2020
Chemistry is an empirical science. Scientists often pose questions to understand the chemistry in everyday life and seek answers to these questions. To achieve this, scientists follow a definitive series of steps that together make up the Scientific Method. This approach involves making observations, asking questions, building a hypothesis, conducting experiments, analyzing results, and forming a conclusion. Observation and Question The first step in the scientific method is observing a...
01:30
Methods of Sterilization II: Chemical Methods
0 Views •
2023
In healthcare, the chemical method of sterilization uses chemical sterilants to treat surgical instruments and medical supplies to help prevent the transmission of infectious pathogens to patients. Due to heat sensitivity, most medical supplies and equipment should not be exposed to high temperatures. These parts include rubber, plastic, glass, and other similar elements. Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
08:19
The Evans Method
0 Views •
2023
Source: Tamara M. Powers, Department of Chemistry, Texas A&M University While most organic molecules are diamagnetic, wherein all their electrons are paired up in bonds, many transition metal complexes are paramagnetic, which has ground states with unpaired electrons. Recall Hund's rule, which states that for orbitals of similar energies, electrons will fill the orbitals to maximize the number of unpaired electrons before pairing up. Transition metals have partially populated d-orbitals...
07:23
Scientific Method - Concepts
0 Views •
2019
The scientific method is used to solve problems and explain phenomena. The development of the scientific method coincided with changes in philosophy underpinning scientific discovery, radically transforming the views of society about nature. During the European Renaissance, individuals such as Francis Bacon, Galileo, and Isaac Newton formalized the concept of the scientific method and put it into practice. Although the scientific method has been revised since its early conceptions, much of the...
FAQs
The calculation gives each interval a width multiplied by the mean of its two endpoint measurements: (t2−t1)(C1+C2)/2. Summing these interval areas produces the overall estimate. This formulation allows investigators to use observations collected at different time points while preserving the contribution of each interval according to its actual duration.
Sampling frequency affects how faithfully the estimate follows the underlying time course. Closely spaced observations provide more intervals and can better capture changes between measurements, whereas sparse sampling may overlook variation. Consequently, accuracy depends not only on the calculation itself but also on whether the recorded points represent the important changes in the curve.
The method uses measured values from adjacent observations, so researchers do not need to specify a continuous equation for the entire curve. This makes it suitable when clinical data consist of discrete measurements. However, the estimate remains tied to what was actually sampled, meaning the sampling design influences how well the calculated area reflects the measured time course.
Researchers first arrange the observations in time order and identify each pair of adjacent measurements. For every interval, they determine the time width, average the two endpoint values, and multiply those quantities to obtain the interval area. Adding the interval areas yields the overall estimate, which can then support interpretation of the time-dependent clinical measurement.
In pharmacokinetic research, the method estimates the area under a concentration-time curve from sampled drug concentrations. The resulting area summarizes drug exposure across the observed period and can support comparisons among treatments. Its usefulness depends on whether the concentration measurements are frequent enough to represent relevant changes over time.
Beyond drug concentration profiles, the method can summarize other clinical measurements that change over time when values are available at discrete observations. The calculated area provides a single summary of the measured time course, but interpretation still requires attention to sampling frequency and whether the observations capture meaningful changes between recorded points.