Moroccan cave reveals world’s oldest shell beads

2021 ◽  
Author(s):  
Rieko Kawabata
Keyword(s):  
Shell Beads

scholarly journals Field Report on the Excavation of Indian Villages in the Vicinity of the Spiro Mounds, Leflore County, Oklahoma

2000 ◽  
Author(s):  
Kenneth G. Orr
Keyword(s):  
United States ◽  
Gulf Coast ◽  
The United States ◽  
Archaeological Science ◽  
Shell Beads ◽  
Field Report ◽  
Relationship Of

A wealth of strikingly unusual and beautiful objects of Indian manufacture were excavated from the burials of the Spiro Mound, Leflore (sic.) County, Oklahoma during 1936-37. Engraved Gulf Coast conch shells, shell beads of a dozen types, river pearls, effigy pipes, long delicately chipped flint blades, feather and textile cloths and precisely incised pottery vessels were excavated in quantities. So unusual was this material that, at the time, the archaeological science was unable to answer a host of questions which immediately arose concerning the identity of the tribe who had made the artifacts and who were buried with them. How long ago had they occupied the region? From where had they come, and where did they go? The chronological relationship of the Spiro Mound Culture to the known cultures of the United States was of particular concern to the investigators. How and where did this tribe fit into the picture of America's past?

Preparation of Polydivinylbenzene/Au Core-Shell Beads

2006 ◽  
pp. 1515-1518
Author(s):  
K.Xuyen Phan ◽  
Mi Suk Cho ◽  
Jae Do Nam ◽  
Hyouk Ryeol Choi ◽  
Ja Choon Koo ◽  
...  
Keyword(s):  
Core Shell ◽  
Shell Beads

scholarly journals Late Holocene edge-ground axe production and marine shell beads from Brooking Gorge 1 rockshelter, southern Kimberley

2018 ◽  
Vol 84 (2) ◽  
pp. 196-202 ◽  
Author(s):  
Tim Ryan Maloney ◽  
Sue O’Connor ◽  
India Ella Dilkes-Hall ◽  
Michelle C. Langley
Keyword(s):  
Late Holocene ◽  
Shell Beads ◽  
Marine Shell

scholarly journals Core-Shell Beads as Microreactors for Phylogrouping of E. coli Strains

Micromachines ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 761
Author(s):  
Lena Gorgannezhad ◽  
Kamalalayam Rajan Sreejith ◽  
Melody Christie ◽  
Jing Jin ◽  
Chin Hong Ooi ◽  
...  
Keyword(s):  
Thermal Cycling ◽  
Target Genes ◽  
Simultaneous Detection ◽  
Sample Volume ◽  
Small Sample ◽  
Core Shell ◽  
Promising Alternative ◽  
E Coli ◽  
Liquid Marble ◽  
Shell Beads

Multiplex polymerase chain reaction (PCR) is an effective tool for simultaneous detection of target genes. Nevertheless, their use has been restricted due to the intrinsic interference between primer pairs. Performing several single PCRs in an array format instead of a multiplex PCR is a simple way to overcome this obstacle. However, there are still major technical challenges in designing a new generation of single PCR microreactors with a small sample volume, rapid thermal cycling, and no evaporation during amplification. We report a simple and robust core-shell bead array for a series of single amplifications. Four core-shell beads with a polymer coating and PCR mixture were synthesized using liquid marble formation and subsequent photo polymerization. Each bead can detect one target gene. We constructed a customised system for thermal cycling of these core-shell beads. Phylogrouping of the E. coli strains was carried out based on the fluorescent signal of the core-shell beads. This platform can be a promising alternative for multiplex nucleic acid analyses due to its simplicity and high throughput. The platform reported here also reduces the cycling time and avoids evaporation as well as contamination of the sample during the amplification process.

scholarly journals Bioinspired genotype–phenotype linkages: mimicking cellular compartmentalization for the engineering of functional proteins

2015 ◽  
Vol 5 (4) ◽  
pp. 20150035 ◽  
Author(s):  
Liisa D. van Vliet ◽  
Pierre-Yves Colin ◽  
Florian Hollfelder
Keyword(s):  
Synthetic Biology ◽  
Directed Evolution ◽  
Enzyme Catalysis ◽  
Darwinian Evolution ◽  
Oil Droplets ◽  
Shell Beads ◽  
Cellular Compartmentalization ◽  
In Cells

The idea of compartmentalization of genotype and phenotype in cells is key for enabling Darwinian evolution. This contribution describes bioinspired systems that use in vitro compartments—water-in-oil droplets and gel-shell beads—for the directed evolution of functional proteins. Technologies based on these principles promise to provide easier access to protein-based therapeutics, reagents for processes involving enzyme catalysis, parts for synthetic biology and materials with biological components.

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