Results 111 to 120 of about 7,041 (258)
A Unique Engraved Shale Pendant from the Site of Star Carr: the oldest Mesolithic art in Britain
Internet Archaeology, 2016 In 2015 an engraved shale pendant was found during excavations at the Early Mesolithic site of Star Carr, UK. Engraved motifs on Mesolithic pendants are extremely rare, with the exception of amber pendants from southern Scandinavia.
Nicky Milner +15 more
doaj +1 more source
Novel Alternating Fluorene-Based Conjugated Polymers Containing Oxadiazole Pendants with Various Terminal Groups [PDF]
, 2016 A series of soluble alternating fluorene-based copolymers containing symmetrical and asymmetrical 1,3,4-oxadiazole (OXD) pendants with various terminal groups are synthesized by the palladium-catalyzed Suzuki coupling reaction.
Hsiao-Hsien Sung (2705017) +1 more
core +1 more source
Functional and Network PHAs via Stereoselective Polymerization and Tailored Post‐Transformation
Angewandte Chemie, EarlyView.Catalyst‐controlled stereoselective (co)polymerization of functionalized lactones produces vinyl‐, allyl‐, and propargyl‐functionalized PHAs with high syndiotacticity and a broad applicable temperature window, which can be further transformed into crosslinked PHA thermosets, elastic supramolecular networks, and functional grafts. ABSTRACT Incorporation
Ruirui Li +6 more
wiley +2 more sources
Religious pendants, Jesus Christ, cross [PDF]
Religious pendants. Jesus Christ and cross. File 1: Broken cross, penny for size.
core
Iterative synthesis of monodisperse pendants for making comb-like polyurethanes [PDF]
, 2018 Polyurethanes grafted with well-defined polar pendants were synthesized and investigated. A series of linear and dendritic poly(urea/malonamide)s with uniform chain length were first prepared from an iterative synthesis route, which is based on a dual ...
Shenghong A. Dai +8 more
core +1 more source
Почвознание, агрохимия и екология, 2010 Accumulation of secondary calcium carbonates in arid and semiarid regions is а valuable tool in evaluating thе degree of soil evolution, soil age, paleoenvironmental reconstruction, soil classification and land use.
SHAHRAM МАNAFI
doaj
Angewandte Chemie, EarlyView.A metal‐free fluorinated ketazine‐linked COF is introduced as an efficient electrocatalyst for nitrate reduction to ammonia under neutral conditions. Fluorine substitution enhances π–π stacking and crystallinity, enabling a Faradaic efficiency of 59.9% and an NH3 yield rate of 1639.9 µmol h−1 mgCOF−1 at −0.9 V versus RHE. This establishes an unexplored
Islam E. Khalil +12 more
wiley +1 more source
Early Chinese Faience and Glass Beads and Pendants [PDF]
, 2013 The earliest Chinese beads and pendants were composed of faience and appeared during the early Western Zhou period, around the 11th Century B.C. True glass began to be made about the time of the Spring and Autumn period (771-467 B.C.). An amazing variety
Kwan, Simon
core +4 more sources
The Typology of the Sapalli Culture Necklaces
Поволжская археологияThe Sapalli culture is a culture that was formed in the Northern Bactria region in the Late Bronze Age (2200–1300 BC), and different jewelry (pins, diadems, earrings, beads, necklaces, pendants, amulets, bracelets and rings) have been found at the ...
Khamidov Odiljon A. +1 more
doaj +1 more source
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT Biodegradable and low‐irritant amino acid–based surfactants have attracted considerable attention as environmentally friendly alternatives to conventional petroleum‐derived surfactants. In this study, a series of acyl amino acid surfactants with identical amino acid head groups but different alkyl chain lengths were synthesized via a modified ...
Toshihiro Takeshita +11 more
wiley +1 more source