Results 71 to 80 of about 371,037 (309)

Khat (Catha edulis): The herb with officio-legal, socio-cultural and economic uncertainty

open access: yesSouth African Journal of Science, 2010
Khat (Catha edulis) is a plant of uncertain and highly controversial status grown in the countries around the Red Sea and on the eastern coast of Africa. The chewing of khat leaves has a deep-rooted religious and socio-cultural tradition.
Sikiru Lamina
doaj  

The Long-Time Chronoamperometric Current at an Inlaid Microband (or Laminar) Electrode

open access: yesSensors, 2013
In this article, we derive an approximate asymptotic analytical expression for the long-time chronoamperometric current response at an inlaid microband (or laminar) electrode.
Christopher G. Bell
doaj   +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

Probable Measure Estimating Tool Employed by the Aeneolithic Potters

open access: yesEXARC Journal, 2012
The article proposes that an item, ornamented with a geometric pattern with inscribed diagonal cross and attributed to the Afanasievo culture (Aeneolithic, South Siberia), represents a primitive tool reflecting practical knowledge of basic geometry by ...
Eva Lamina
doaj  

Composites of Shellac and Silver Nanowires as Flexible, Biobased, and Corrosion‐Resistant Transparent Conductive Electrodes

open access: yesAdvanced Functional Materials, EarlyView.
Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein   +4 more
wiley   +1 more source

Local expression of expansin induces the entire process of leaf development and modifies leaf shape [PDF]

open access: yes, 2001
Expansins are a family of extracellular proteins proposed to play a key role in wall stress relaxation and, thus, in cell and tissue growth. To test the possible function of expansins in morphogenesis, we have developed a technique that allows transient ...
Cho   +14 more
core   +2 more sources

Smart, Bio‐Inspired Polymers and Bio‐Based Molecules Modified by Zwitterionic Motifs to Design Next‐Generation Materials for Medical Applications

open access: yesAdvanced Functional Materials, EarlyView.
Bio‐based and (semi‐)synthetic zwitterion‐modified novel materials and fully synthetic next‐generation alternatives show the importance of material design for different biomedical applications. The zwitterionic character affects the physiochemical behavior of the material and deepens the understanding of chemical interaction mechanisms within the ...
Theresa M. Lutz   +3 more
wiley   +1 more source

Reconstruction of the Geometric Décor Technology of the Bronze Age Ceramics in Siberia

open access: yesEXARC Journal, 2017
The grassland and forest steppes ranging from the Ural to the Altai-Sayan mountains were dominated by Andronovo Family cultures during the second millennium BC (the Bronze Age) (Koryakova and Epimakhov 2007; Мартынов 2005).
Eva Lamina
doaj  

The origin of planar lamination in fine‐grained sediment deposited by subaqueous sediment gravity flows

open access: yesThe Depositional Record
Planar lamination is a ubiquitous component of modern and ancient fine‐grained sediments deposited by subaqueous sediment gravity flows. These sediments commonly exhibit alternating sub‐millimetre‐thick, sharply bounded silt‐rich and clay‐rich layers ...
Omar N. Al‐Mufti, R. William C. Arnott
doaj   +1 more source

Morphometric Analysis of Dry Typical Thoracic Vertebrae: A Cross sectional Study from Telangana, India [PDF]

open access: yesJournal of Clinical and Diagnostic Research
Introduction: Morphometric measurements of dry typical thoracic vertebrae play an important role clinically in managing scoliosis, performing laminectomies, guiding pedicle screw fixation, and in designing spinal implants or prostheses for ...
BH Shiny Vinila   +3 more
doaj   +1 more source

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