Home  About us  Contact
 

Glass Vessel (glass + vessel)

Distribution by Scientific Domains
Life Sciences50%
Humanities and Social Sciences50%

Selected Abstracts

ANALYSIS OF FIRST MILLENNIUM bc GLASS VESSELS AND BEADS FROM THE PICHVNARI NECROPOLIS, GEORGIA*

ARCHAEOMETRY, Issue 6 2009
A. J. SHORTLAND
The Pichvnari necropolis on the Black Sea coast of Georgia lies in an area known in the late first millennium as ,Colchis', on part of the trade route leading to the Orient. The burials of the necropolis date to the late fifth century bc and frequently contain grave goods, including extremely well-preserved polychrome glass beads and core-formed vessels. This paper presents a study of these vessels both stylistically and archaeologically and using SEM,WDS and LA,ICPMS. It reveals that the vessels have compositional differences that may point to multiple manufacturing sites. One of the vessels appears stylistically unique and may exhibit one of the earliest uses of manganese as a decolorizer. Major and minor element data for the vessels suggest that they may belong to the same ,Levantine' group as many Roman glass objects, suggesting that a source of sand on the coast of the Levant could have been used in their production. The beads clearly show glass with both natron- and plant ash-based flux with distinct rare earth compositions, showing multiple sites of production, some of which were probably either in the Middle East or the Indian subcontinent. [source]

BIOLOGY OF CHRYSOPA PHYLLOCHROMA WESMAEL (NEUROPTERA: CHRYSOPIDAE).

INSECT SCIENCE, Issue 3 2004
II: INTRASPECIFIC INTERFERENCE AND SEARCHING CAPACITY
Abstract, The present study examined intraspecific interference and searching behavior of Chrysopa phyllochroma Wesmael (Neuroptera: Chrysopidae) for Aphis gossypii Glover (Homoptera: Aphididae) nymphs under laboratory and greenhouse conditions. The results were shown as follow: 1) In four different arenas (i.e. Petri dish, glass vessel, glass vessel with barriers in it, and cage with potted cotton plant), the predaceous efficiency of C. phyllochroma larvae varied with the predator density, the hunt constant (Q) and the intraspecific interference (m) increased with the prey density but decreased with the space heterogeneity; 2) In cage with potted cotton plant, the first- and second-instar green lacewing larvae consumed 13.6 and 29.4 cotton aphiddday respectively. The number of cotton aphids consumed by C. phyllochroma on lower leaves was significantly less than that on upper leaves; and 3) In cage with potted cotton plant, the percentage of the first- and second-instar green lacewing larvae located on upper leaves was significant less than that on lower leaves. [source]

The Tantura F Shipwreck, Israel

INTERNATIONAL JOURNAL OF NAUTICAL ARCHAEOLOGY, Issue 1 2007
Ofra Barkai
Tantura F is the first wreck excavated so far in the eastern Mediterranean dated to the beginning of the 8th century AD (the local early Islamic period), based on 14C and pottery analysis. Among the finds were the remains of about 30 ceramic vessels, two anchors, food remnants, fish-bones, a needle, a spoon and a glass vessel. Tantura F was c.15 m long and 5 m wide, and hull remains comprise keel, frames, planks, stringers, mast-step, and other internal components. Construction features clearly indicate frame-based construction, considerably earlier than it is generally thought to have been first employed. © 2006 The Authors [source]

Confocal Optical System: A Novel Noninvasive Sensor To Study Mixing

BIOTECHNOLOGY PROGRESS, Issue 5 2005
Jose R. Vallejos
A novel confocal optical system to study mixing time in small-scale bioreactors is presented. The system is designed to monitor fluorescence upon tracer addition from a localized confocal volume of 0.21 mL within a glass vessel. The key elements of the fluorescence-based confocal system are a pinhole, a lens, an APD (Avalanche photodiode) detector, and light filters. The optical technique was validated by comparison with a pH-based technique. Finally, the optical sensor was tested and a real cultivation media (i.e., spent mammalian cell media) was used to measure mixing time in a 12.5-mL stirred transparent vessel. High accuracy, easy results interpretation, and low costs are the three most attractive characteristics of the sensor. Because of its noninvasive nature and versatility, the results suggest that the confocal system is a promising tool to perform mixing time studies in stirred vessels. [source]