Results 31 to 40 of about 182,251 (343)

Generic revision of holocystitid blastozoans [PDF]

open access: yesActa Palaeontologica Polonica
Brightonicystis is a valid genus characterised by nine or more oral plates, with two in the B and D ambulacra not reaching the inner mouth edge; five ambulacral facets shared by oral and facetal plates; two generations of smooth thecal plates with ...
CHRISTOPHER R.C. PAUL
doaj   +1 more source

Physical Cranial Characters of Wajak Man [PDF]

open access: yes, 2014
Human fossils from Wajak, or better known as Wajak Man which is noted as Wajak 1, have been discovered by von Rietschoten in 1888 during exploration prospecting activities at the marble mine area in Tulungagung. The Wajak 1 found in cave sediments during
Kurniasih, Anis, Zaim, Yahdi
core  

A multicriteria analysis of photovoltaic systems: Energetic, environmental, and economic assessments [PDF]

open access: yes, 2015
The development of photovoltaic (PV) energy has led to rising efficiencies, better reliability, and falling prices. A multicriteria analysis (MCA) of PV systems is proposed in this paper in order to evaluate the sustainability of alternative projects ...
Cucchiella, Federica, D'Adamo, Idiano
core   +4 more sources

Ideal Molecular Sieving with a Dense MOF for Helium Upgrading with Highly Diffusion Selective Mixed Matrix Membranes

open access: yesAdvanced Functional Materials, EarlyView.
The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal   +10 more
wiley   +1 more source

Recent origin of low trabecular bone density in modern humans [PDF]

open access: yes, 2014
Humans are unique, compared with our closest living relatives (chimpanzees) and early fossil hominins, in having an enlarged body size and lower limb joint surfaces in combination with a relatively gracile skeleton (i.e., lower bone mass for our body ...
Bernhard Zipfel   +11 more
core   +1 more source

Dual‐Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips‐Bags for Year‐Round Thermal Management

open access: yesAdvanced Functional Materials, EarlyView.
Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song   +4 more
wiley   +1 more source

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

open access: yesAdvanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong   +3 more
wiley   +1 more source

Simoniteuthis, a new vampyromorph coleoid with prey in its arms from the Early Jurassic of Luxembourg

open access: yesSwiss Journal of Palaeontology
The evolutionary history of the cephalopod order Vampyromorpha with its only recent representative, Vampyroteuthis infernalis, the deep-sea vampire squid, is still obscure and a new specimen from the Early Jurassic of Luxembourg, provides new information
Dirk Fuchs, Robert Weis, Ben Thuy
doaj   +1 more source

The endocranial anatomy of the stem turtle Naomichelys speciosa from the Early Cretaceous of North America [PDF]

open access: yesActa Palaeontologica Polonica, 2019
Fossil turtles are one of the least studied clades in regard to endocranial anatomy. Recently, the use of non-invasive technologies, such as radiographic computed tomography (CT), increased the knowledge of the neuroanatomy of several extinct and extant ...
Ariana Paulina-Carabajal   +2 more
doaj   +1 more source

Copper‐based Materials for Photo and Electrocatalytic Process: Advancing Renewable Energy and Environmental Applications

open access: yesAdvanced Functional Materials, EarlyView.
Cu‐based catalysts as a cornerstone in advancing sustainable energy technologies are fully reviewed in this manuscript, highlighting their potential in photo‐ and electrocatalysis. It includes metallic copper, copper oxides, copper sulfides, copper halide perovskites, copper‐based metal–organic frameworks (MOFs), and covalent organic frameworks (COFs),
Jéssica C. de Almeida   +16 more
wiley   +1 more source

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