Biology

Recent in Biology (page 12 of 28)

Comparatively Speaking: Pathogenic vs. Non-pathogenic Bacteria

To explain the difference between pathogenic and nonpathogenic bacteria, Tony O’Lenick looks to Kelly Dobos, who notes that nonpathogenic bacteria could become pathogens in immune-compromised hosts.

In Sight—Nano-sizing Chitosan for Wound Healing, Anti-aging

Mihaela Leonida, PhD, a professor of chemistry at Fairleigh Dickinson University, investigated the antibacterial properties of chitosan for cosmetic and pharmaceutical uses. She found that the material exhibited enhanced effects after being nano-sized.

A Dermatological View—Exploring Potential Differences in Percutaneous Penetration and Barrier Function Between Individuals of Different Ethnicity or Skin Color

The current understanding of percutaneous penetration and parameters that can influence it remains a sub judice area. Ethnicity or pigmentation, for instance, can be implied in percutaneous absorption for which several studies, described here, have been conducted to clarify their roles.

Propylparaben and Triclosan Found to Increase Allergy Risk in Children

A study conducted by Johns Hopkins Children's Center and funded by the National Institutes of Health supports the common "hygiene hypothesis" that some antibacterial chemicals and preservatives in hygiene products may make children more susceptible to food and environmental allergens.

Molecule Identified for Wound Healing and Psoriasis Applications

Researchers from the University of California, San Diego School of Medicine have identified a protein that may aid in the development of psoriasis and wound-healing treatments.

A 'Look' at Curl in Eyelashes

Many visually perceptible phenomena are observed in hair, which arise from intrinsic attributes as well as the orientation of fiber assembly. The use of image analysis to further understanding of hair properties is the focus of Roger McMullen contribution to Alluredbooks’ Practical Modern Hair Science, and in the following excerpt, he briefly turns his attention to that part of the body that bares perhaps more than a little semblance to hair: the eyelashes.

A Dermatological View—In vitro Buffering Capacity of Human Skin Layers

Previous studies demonstrate that skin buffering capacity can be measured in vitro by applying several concentrations of hydrogen chloride (HCl) and sodium hydroxide (NaOH) on skin and evaluating the pH change pre- and post-dosing. Here, the authors employed this technique to evaluate the buffering capacity of skin layers including intact SC, denuded SC and dermis skin samples.

Research Reveals New Stratum Corneum Structure

Researchers in Sweden have described a new structure and function of the stratum corneum at a molecular level, providing for a deeper understanding of skin diseases as well as the potential for large scale delivery via the skin.

Consumer Perspective—Skin Types and Sensory Experience

Sophisticated texture and fragrance as part of a formulation’s aesthetics are important to the discerning consumer, and skin type is the primary influence behind how the consumer perceives a skin care product. For example, consumers with dry skin require a richer moisturizer, even though the product should absorb quickly for a smooth finish.

Researchers Identify Protein Responsible for Inhibiting Hair Growth

Scientists at the Perelman Center for Advanced Medicine at the University of Pennsylvania have identified a protein that may lead to more effective treatments of male pattern baldness.

History, Characteristics and Application of Traditional Chinese Medicine in Cosmetics

Cosmetics based on traditional Chinese medicine (TCM) are formulated not only using TCM drugs, but also according to cultural theories and principles. This article serves as a review of TCM drug ingredients, history and principles, to assist product developers in understanding how they can be combined for products targeted to this specialized market.

Human Skin and Ocular Flora: The Effect of Product Formulation, Part 2

This second installment of a two-part article reviews the transient and resident microbial populations of the human ocular area and how they alter with age, environment and exposure to antimicrobial agents. Considerations for the formulator of how cosmetic products may affect and be impacted by the flora also are provided.

Can't find what you're looking for? Try searching, or looking through past issues.