African American Hair Sampling
African American Hair Sampling - Related Videos
06:01
Collecting Hair Samples for Hair Cortisol Analysis in African Americans
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Cited by 46 •
2018
Hair cortisol concentration analysis provides an alternative to traditional measures of cortisol; however, to collect hair samples from African Americans, scientists need to be culturally informed and competent. The purpose of this protocol is to demonstrate a culturally informed technique to collect hair samples for cortisol analysis from African Americans.
07:40
A Noninvasive Hair Sampling Technique to Obtain High Quality DNA from Elusive Small Mammals
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Cited by 28 •
2011
We present a noninvasive sampling approach to efficiently collect hair samples from elusive small mammals, as shown for the American pika. We demonstrate the utility of this method by extracting DNA from sampled hair and amplifying several types of molecular markers commonly used in studies of wildlife ecology and conservation.
12:07
Physiological Preparation of Hair Cells from the Sacculus of the American Bullfrog (Rana catesbeiana)
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Cited by 8 •
2017
The American bullfrog's (Rana catesbeiana) sacculus permits direct examination of hair-cell physiology. Here the dissection and preparation of the bullfrog's sacculus for biophysical studies is described. We show representative experiments from these hair cells, including the calculation of a bundle's force-displacement relation and measurement of its unforced motion.
08:54
Validated LC-MS/MS Panel for Quantifying 11 Drug-Resistant TB Medications in Small Hair Samples
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Cited by 5 •
2020
Current methods of analyzing patients’ adherence to complex drug resistant-tuberculosis (DR-TB) regimens can be inaccurate and resource-intensive. Our method analyzes hair, an easily collected and stored matrix, for concentrations of 11 DR-TB medications. Using LC-MS/MS, we can determine sub-nanogram drug levels that can be utilized to better understand drug adherence.
08:42
Methods for Comparing Nutrients in Beebread Made by Africanized and European Honey Bees and the Effects on Hemolymph Protein Titers
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Cited by 15 •
2015
Here are methods to quantify nutrients in pollen before and after its conversion to beebread by two subspecies of honeybees. We describe techniques to measure beebread consumption and resulting protein titers in both subspecies.
FAQs
The proximal segment is prioritized because it lies closest to the scalp and represents the most recently formed portion of the collected strand. Analysts can therefore relate its position to hair growth and the period during which substances were incorporated. Recording the segment’s length helps preserve that relationship during preparation and interpretation of chemical results.
Hair texture and curl pattern can affect both collection and interpretation. For African American participants, these characteristics should be treated as technical variables rather than incidental features, because they may influence how a sample is obtained and how analytes are deposited in the strand. Accounting for them supports more consistent comparisons across patients or study participants.
Cosmetic treatments matter because they can influence analyte deposition and the interpretation of laboratory findings. A protocol should document relevant treatment information when available and avoid treating all strands as chemically equivalent. This context helps analysts distinguish differences potentially associated with the hair itself or its treatment history from differences observed in test results.
A standardized workflow begins by selecting a small scalp-hair sample and cutting a proximal segment close to the scalp. The collector then documents the segment’s length and location before the specimen is prepared for chemical testing. Consistent handling preserves information about the sample’s position and supports comparable analysis across participants.
Length and scalp location provide essential context for interpreting the specimen. The proximal position identifies which portion is closest to the scalp, while the measured length documents the extent of the segment submitted for analysis. Together, these records help analysts connect laboratory findings with the strand’s growth-related history rather than evaluating an undocumented sample.
In medicine, this approach can support assessment of chemical exposures, drug or hormone measurements, and other biological markers. It is also relevant to toxicology, adherence studies, and epidemiological research. Because collection can provide a practical alternative to repeated blood or urine sampling, it may help investigations that require information across study participants or over time.
Appropriate protocols recognize that hair texture, curl pattern, pigmentation, and cosmetic treatments can influence collection, analyte deposition, and interpretation. Applying a uniform procedure without considering these factors may weaken comparisons among participants. Culturally and technically responsive sampling therefore improves the relevance of findings for Black patients and study populations in medical research.