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Glossary Poisson's ratio

measure of material's perpendicular deformation to applied force

Poisson's ratio is a measure of how much a material deforms in directions perpendicular to the direction of applied force. When you stretch a rubber band, for example, it not only gets longer but also gets thinner. Poisson's ratio quantifies this thinning effect. For most materials, this ratio is between 0 and 0.5, where a value of 0.5 means the material volume remains constant during deformation.

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research Strain and Strain Recovery of Human Hair from the Nano- to the Macroscale

November 2023 in “Life”

This study found that human hair exhibits significant deformation in its intermediate filaments under strain, with recovery taking about 1000 minutes, suggesting a self-healing period post-mechanical stress. Additionally, cuticle scales deform much less than the cortex, and the Poisson ratio aligns with soft matter properties.

research A mechanical model of overnight hair curling

September 2015 in “The European physical journal. E, Soft matter and biological physics/The European physical journal. E, Soft matter”

In this study, a mechanical model was developed to describe and validate the effectiveness of overnight hair curling, suggesting that combining it with hair fixatives can maintain a desired curl for over a day.

research Rational Design and Functionalization of Melt Electrowritten 4D Scaffolds for Biomedical Applications

January 2026 in “Nano-Micro Letters”

This review discusses the principles, materials, and applications of melt electrowriting-based 4D printing for creating biomimetic scaffolds, but reports no new clinical results; it highlights recent advancements and remaining challenges in the field.

research Anais do V International Workshop on Rational Use of Medicines.

January 2021

This article reviews knowledge-sharing efforts in pharmaceutical sciences at the University of Sorocaba, highlighting global collaboration on rational medicine use, without reporting new study results.

research Anais do V International Workshop on Rational Use of Medicines

January 2021

This article discusses the Graduate Program in Pharmaceutical Sciences at the University of Sorocaba and emphasizes collaborating internationally to improve health policies and practices but reports no new research findings.

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community Creatine is the opposite of minoxidil !

324 upvotes 11 months ago

Creatine may counteract minoxidil's hair growth effects by closing potassium ATP channels, potentially leading to hair loss in predisposed individuals. Despite anecdotal reports, there is no conclusive evidence linking creatine to hair loss.

community Why do people say you will have an extremely high chance of maintenance if you are on Dutasteride, if 0.5 mg only removes 50% of scalp dht

in Finasteride/Dutasteride 30 upvotes 1 year ago

Dutasteride and finasteride are effective for many in reducing hair loss by lowering DHT levels, though results vary based on individual sensitivity and genetics. Higher doses of dutasteride may not significantly increase hair growth due to diminishing returns, and topical finasteride is suggested as an alternative for some.

community There’s a war against finasteride and dht blockers

in Finasteride/Dutasteride 417 upvotes 6 months ago

Finasteride is a controversial hair loss treatment, with some users experiencing positive results and others facing side effects like erectile dysfunction. The discussion emphasizes the importance of personal choice and informed decision-making.

community Switch from fin to dut and its worse

4 upvotes 1 year ago

Switching from finasteride to dutasteride can worsen hair loss for some men due to increased testosterone levels. Topical treatments like RU58841 and Pyrilutamide are suggested to counteract these effects, but individual responses vary.

community Really stressed about my hair & so I am plannning to go with redensyl as against minoxidil

in Minoxidil 2 years ago

A user is considering using redensyl with procapil instead of minoxidil to reduce hair fall. They are stressed about hair loss and seek community feedback on these treatments.

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Hair Loss TreatmentsHair Transplant
Busan Hair Restoration ClinicBusan · KR

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