Ex Situ Samples
Ex Situ Samples - Related Videos
07:43
Analyzing Situations in Helping Behavior
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2023
Source: Julian Wills & Jay Van Bavel—New York University Social psychologists and personality psychologists both attempt to predict human behavior, but they focus on very different factors. Whereas personality psychologists focus on how personality traits, character, and individual differences affect behavior, social psychologists focus primarily on the power of social situations in shaping behavior. We often underestimate the role that social situations can play in determining behavior. We...
01:18
Types of Buying Situations
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2025
The concept of a buying situation is central to understanding consumer behavior in marketing. A buying situation refers to the specific context in which a consumer is making a purchasing decision. It encompasses factors such as the level of buyer involvement, the complexity of the decision, and the buyer's familiarity with the product or service. There are typically three categories of buying situations: new-task buying, modified rebuy, and straight rebuy. New-Task Buying occurs when a consumer...
07:55
An All-in-one Sample Holder for Macromolecular X-ray Crystallography with Minimal Background Scattering
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Cited by 4 •
2019
A novel sample holder for macromolecular X-ray crystallography along with a suitable handling protocol is presented. The system allows crystal growth, crystal soaking and in situ diffraction data collection at both, ambient and cryogenic temperature without the need of any crystal manipulation or mounting.
08:27
Sampling and Identification of Microplastics in Groundwater
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Cited by 1 •
2025
Here, we provide a detailed description of sampling groundwater from a borehole for microplastics analysis using a patented sampling system developed for this purpose. The protocol details the methods for sampling microplastics from boreholes, as well as the separation and chemical identification of microplastics.
01:18
Sampling Methods: Sample Types
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2024
Sampling materials are classified into three main types: solid, liquid, and gas. Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
FAQs
Removing a specimen from service conditions makes it possible to control the laboratory environment and repeat measurements under defined settings. That control helps engineers separate material or device behavior from changing operating influences, while detailed preparation supports consistent characterization. The trade-off is that removal may alter environmental effects or transient behavior, so results are strongest when interpreted alongside in situ monitoring.
Ex situ analysis supplies controlled, detailed measurements after a specimen has been isolated, whereas in situ monitoring preserves the specimen’s operating context. The two approaches therefore answer different engineering questions: laboratory characterization can reveal structure, composition, mechanical response, or performance in repeatable conditions, while in situ observations help retain service-related effects. Combining their findings improves interpretation without treating either method as complete alone.
Sample preparation, isolation from service conditions, and the selected laboratory settings can influence what engineers observe. Preparation determines how the specimen is presented for examination, while defined conditions improve repeatability across measurements. Instrument choice also matters because different dedicated instruments support characterization of structure, composition, mechanical response, or performance. Engineers must therefore relate each result to its preparation and testing context.
An engineering workflow begins by collecting or fabricating a specimen, then removing and isolating it from the operating environment. The sample is prepared under controlled laboratory conditions before engineers select dedicated instruments for characterization. Measurements may address structure, composition, mechanical response, or performance. Recording the preparation and test conditions helps place the resulting data in context and supports repeatable comparisons.
They are useful when engineers need detailed evidence for materials selection, failure analysis, quality control, or validation of manufacturing processes. A controlled specimen provides focused information about a material or device during examination. These applications connect laboratory measurements to design decisions, process checks, and investigations of whether manufactured results meet intended requirements.
Characterization can describe a specimen’s structure and composition, measure its mechanical response, or assess aspects of device performance. The resulting data support comparisons among materials, examination of damaged or failed specimens, and evaluation of manufacturing processes. Because the measurements occur under defined laboratory conditions, engineers can obtain repeatable evidence, while still considering that service-related or transient behavior may not be fully preserved.