Results 61 to 70 of about 197,649 (307)

Structure Formation in Butterfly Scales: Interplay of Genetic Control, Mechanical Instabilities, and Dynamic Material Properties

open access: yesAdvanced Functional Materials, EarlyView.
Butterfly wing scales are intricate cuticular functional nanosctructures. This perspective suggests that spatially varying material properties, cytoskeletal constraints, and growth‐driven mechanical instabilities shape the resulting nanoscale architectures created from single cells.
Anupama Prakash   +10 more
wiley   +1 more source

Use of natural pigments obtained from cyanobacteria and algae

open access: yesActa et Commentationes: Ştiinţe Exacte şi ale Naturii, 2022
The article reflects data on the use of cyanobacteria pigments in cosmetology. One of the sources of natural antioxidants are the pigments obtained from various algae and cyanobacteria. An essential source for extracting pigments and biologically active
Alina Trofim, Anastasia Verdeș
doaj   +1 more source

Metachromatic Butterfly Bile Pigments for Multi‐Level Optical Security Films

open access: yesAdvanced Functional Materials, EarlyView.
Bio‐derived optical security materials are manufactured by embedding butterfly‐based pigments in polymer films. Tunable color and fluorescence responses arise from concentration‐controlled metachromasy, enabling spatially encoded patterns with distinct visible, UV‐active, and spectral signatures.
Limin Wang, Bodo D. Wilts
wiley   +1 more source

Stability of red pigments from purple sweetpotato (Ipomea batatas (L.), Lam) and other five natural red pigments

open access: yes浙江大学学报. 农业与生命科学版, 2001
Stable effects were determined of red pigments from purple sweetpotato and other five plant natural red pigments from purple grape, purple perilla. black rice and black soybean on such factors as light, heat, minerals and food additives. The red pigments
LU Guo-quan, LI Xiu-ling
doaj   +1 more source

Naturalis Historia, Reconstructed [PDF]

open access: yes, 2013
When Pliny the Elder wrote Naturalis Historia around 70 A.D., the idea of natural history contained and connected biology, geology, and mineralogy with the history of painting and sculpture. Art was an extension of the natural world as its materials were
Briland, Sarah
core   +1 more source

Bioprinting Organs—Science or Fiction?—A Review From Students to Students

open access: yesAdvanced Healthcare Materials, EarlyView.
Bioprinting artificial organs has the potential to revolutionize the medical field. This is a comprehensive review of the bioprinting workflow delving into the latest advancements in bioinks, materials and bioprinting techniques, exploring the critical stages of tissue maturation and functionality.
Nicoletta Murenu   +18 more
wiley   +1 more source

Pelodictyon phaeoclathratifovme sp. nov., a new brown-colored member of the Chlorobiaceae forming net-like colonies [PDF]

open access: yes, 1989
A new strain of the green sulfur bacteria was isolated from the monimolimnion of Buchensee (near Radolfzell, Lake Constance region, FRG). Single cells were rod-shaped, nonmotile and contained gas vacuoles. Typical net-like colonies were formed by ternary
Overmann, Jörg, Pfennig, Norbert
core   +1 more source

Skin‐Interfaced Therapeutic Patches for Wound Fluid Management and Transdermal Drug Delivery

open access: yesAdvanced Healthcare Materials, EarlyView.
This study presents an integrated skin‐interfaced device combining microfluidics, hydrogel film technology, flexible electronics, and iontophoresis‐based transdermal delivery of PDRN to enhance wound healing. The device effectively manages wound fluid, maintains optimal moisture, and non‐invasively delivers therapeutic drugs.
Dongjun Han   +5 more
wiley   +1 more source

Pigments from Microorganisms: A Sustainable Alternative for Synthetic Food Coloring

open access: yesFermentation
Microbial pigments are gaining acceptance as a green, sustainable substitute for synthetic food pigments due to growing health issues and their adverse health impacts.
Akshay Chavan   +6 more
doaj   +1 more source

Control of primary productivity and the significance of photosynthetic bacteria in a meromictic kettle lake. [PDF]

open access: yes, 1989
During 1986 planktonic primary production and controlling factors were investigated in a small (A0 = 11.8 · 103 m2, Zmax = 11.5 m) meromictic kettle lake (Mittlerer Buchensee).
A. Bricaud   +48 more
core   +1 more source

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