Results 51 to 60 of about 342,951 (316)

Intrinsic Photoactive Star ZnPc–Poly(glutamate) Nanoplatforms for Multimodal Glioblastoma Therapy and Brain‐Targeted Delivery

Advanced Functional Materials, EarlyView.
An intrinsic photoactive star‐shaped zinc phtalocyanine‐poly(L‐glutamic acid) (ZnPc‐PGA) nanoplatform for multimodal glioblastoma (GBM) therapy and brain‐targeted elivery. A ZnPc‐PGA‐based multifunctional theranostic nanocarrier platform enables image‐guided, multimodal GBM therapy. ZnPc‐PGA nanocarriers support the integration of fluorescence imaging,
Amina Benaicha‐Fernández, Teodora Ranđelović, Ana Armiñán, Víctor Sebastián, Manuel Fuentes, Cristián Huck‐Iriart, Esther Masiá, Paula Carrascosa‐Marco, Pablo Juanes‐Velasco, Snežana Đorđević, Clara Bayona, Ignacio Ochoa, Maria Medel, Inmaculada Conejos‐Sánchez, María J. Vicent   +14 more
wiley   +1 more source

Tiny habitats of tiny species: the importance of micro-refugia for threatened island-endemic arthropods

Oryx
Island-endemic arthropods are understudied species and likely to be highly threatened with extinction. Analysis of IUCN Red List assessments can be used to highlight important microhabitats requiring conservation for the effective management of island ...
Adam Sharp, Alan Gray
doaj   +1 more source

Silicified Wood‐Inspired, High‐Strength Fire‐Resistant Chitin‐Based Aerogels for Sustainable High‐Temperature Thermal Insulation

Advanced Functional Materials, EarlyView.
Inspired by natural silicified wood, a biomimetic mineralized chitin‐derived aerogel is constructed. It can withstand 81 000 times its own weight, and its backside temperature is 130.4°C after exposure to ∼1300°C butane flame for 600 s, exhibiting high‐strength, fire‐resistance, and super thermal‐insulation properties.
Kai Xu, Qihang Lv, Lubin Liu, Zhezhe Zhou, Chentao Yan, Ao Qin, Jianting Ma, Shuhui Liang, Yue Xu, Min Hong, Bin Li, Pingan Song   +11 more
wiley   +1 more source

Optogenetic stimulation of the locus coeruleus enhances appetitive extinction in rats

eLife
Extinction is a specific example of learning where a previously reinforced stimulus or response is no longer reinforced, and the previously learned behaviour is no longer necessary and must be modified.
Simon Lui, Ashleigh K Brink, Laura H Corbit   +2 more
doaj   +1 more source

Conservation of fishes in the Elands River, Mpumalanga, South Africa: Past, present and future

Koedoe: African Protected Area Conservation and Science, 2014
In an isolated reach, between two large natural waterfalls in the Elands River in Mpumalanga, populations of a critically endangered Kneria sp., the endangered Chiloglanis bifurcus and a genetically unique population of Labeobarbus polylepis occur.
Gordon C. O’Brien, Nico J. Smit, Victor Wepener   +2 more
doaj   +1 more source

High‐Index, Low‐Loss Optical Material Platforms for Ultra‐Broadband Ultraviolet‐to‐Visible Achromatic Metalenses

Advanced Functional Materials, EarlyView.
An integrated material platform combining engineered SiNx thin films and printable ZrO2 nanoparticle‐embedded resin enables broadband achromatic metalenses from the ultraviolet to visible range. The demonstrated meta‐optics achieve near‐diffraction‐limited focusing with minimal chromatic aberration.
Hyunjung Kang, Dongmin Jeon, Eunji Lee, Junsuk Rho   +3 more
wiley   +1 more source

The extinction of the dinosaurs [PDF]

Biological Reviews, 2014
ABSTRACTNon‐avian dinosaurs went extinct 66 million years ago, geologically coincident with the impact of a large bolide (comet or asteroid) during an interval of massive volcanic eruptions and changes in temperature and sea level. There has long been fervent debate about how these events affected dinosaurs.
Brusatte, Stephen L.; id_orcid 0000-0001-7525-7319, Butler, Richard J., Barrett, Paul M., Carrano, Matthew T., Evans, David C., Lloyd, Graeme T., Mannion, Philip D., Norell, Mark A., Peppe, Daniel J., Upchurch, Paul, Williamson, Thomas E.   +10 more
openaire   +3 more sources

Chiral Phase Change Nanomaterials

Advanced Functional Materials, EarlyView.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow, Md Shah Alam, Riad Yahiaoui, Evan M. Smith, Ryan Laing, Jules Gardener, Thomas A. Searles, Piyush J. Shah, Shivashankar Vangala, Joshua R. Hendrickson, Andrew M. Sarangan, Imad Agha   +11 more
wiley   +1 more source

The local conservation status of the regionally rarest bird species in the state of Rio de Janeiro, southeastern Brazil

Journal of Threatened Taxa, 2015
We reviewed the local current status and summarized the suspected causes of rarity, and presumed major threats to the 84 rarest bird speciesin the state of Rio de Janeiro, southeastern Brazil.
Francisco Mallet-Rodrigues, José Fernando Pacheco   +1 more
doaj   +1 more source

De-Extinction [PDF]

Genes, 2018
De-extinction projects for species such as the woolly mammoth and passenger pigeon have greatly stimulated public and scientific interest, producing a large body of literature and much debate. To date, there has been little consistency in descriptions of de-extinction technologies and purposes.
openaire   +2 more sources