scholarly journals Cryogenic stabilization of high vapor pressure samples for surface analysis under ultrahigh vacuum conditions

1999 ◽  
Vol 17 (5) ◽  
pp. 2668-2675 ◽  
Author(s):  
J. J. Bruckner ◽  
K. Wozniak ◽  
S. Hardcastle ◽  
A. Sklyarov ◽  
S. Seal ◽  
...  
Keyword(s):  
Vapor Pressure ◽  
Surface Analysis ◽  
Ultrahigh Vacuum ◽  
High Vapor Pressure ◽  
High Vapor

scholarly journals High Vapor Pressure Perfluorocarbons Cause Vesicle Fusion and Changes in Membrane Packing

2008 ◽  
Vol 95 (10) ◽  
pp. 4737-4747 ◽  
Author(s):  
Berenice Venegas ◽  
Marla R. Wolfson ◽  
Peter H. Cooke ◽  
Parkson Lee-Gau Chong
Keyword(s):  
Vapor Pressure ◽  
Vesicle Fusion ◽  
High Vapor Pressure ◽  
High Vapor

Limited transpiration under high vapor pressure deficits of creeping bentgrass by application of Daconil-Action®

Planta ◽  
2015 ◽  
Vol 243 (2) ◽  
pp. 421-427 ◽  
Author(s):  
Avat Shekoofa ◽  
Pablo Rosas-Anderson ◽  
Danesha S. Carley ◽  
Thomas R. Sinclair ◽  
Thomas W. Rufty
Keyword(s):  
Vapor Pressure ◽  
Creeping Bentgrass ◽  
High Vapor Pressure ◽  
High Vapor

scholarly journals Mucilage Polysaccharide Composition and Exudation in Maize From Contrasting Climatic Regions

2020 ◽  
Vol 11 ◽  
Author(s):  
Meisam Nazari ◽  
Sophie Riebeling ◽  
Callum C. Banfield ◽  
Asegidew Akale ◽  
Margherita Crosta ◽  
...  
Keyword(s):  
Vapor Pressure ◽  
Vapor Pressure Deficit ◽  
Genetic Material ◽  
Root Tips ◽  
High Vapor Pressure ◽  
Climatic Regions ◽  
Randomized Field Experiment ◽  
Neutral Sugars ◽  
High Vapor ◽  
Polysaccharide Composition

Mucilage, a gelatinous substance comprising mostly polysaccharides, is exuded by maize nodal and underground root tips. Although mucilage provides several benefits for rhizosphere functions, studies on the variation in mucilage amounts and its polysaccharide composition between genotypes are still lacking. In this study, eight maize (Zea mays L.) genotypes from different globally distributed agroecological zones were grown under identical abiotic conditions in a randomized field experiment. Mucilage exudation amount, neutral sugars and uronic acids were quantified. Galactose (∼39–42%), fucose (∼22–30%), mannose (∼11–14%), and arabinose (∼8–11%) were the major neutral sugars in nodal root mucilage. Xylose (∼1–4%), and glucose (∼1–4%) occurred only in minor proportions. Glucuronic acid (∼3–5%) was the only uronic acid detected. The polysaccharide composition differed significantly between maize genotypes. Mucilage exudation was 135 and 125% higher in the Indian (900 M Gold) and Kenyan (DH 02) genotypes than in the central European genotypes, respectively. Mucilage exudation was positively associated with the vapor pressure deficit of the genotypes’ agroecological zone. The results indicate that selection for environments with high vapor pressure deficit may favor higher mucilage exudation, possibly because mucilage can delay the onset of hydraulic failure during periods of high vapor pressure deficit. Genotypes from semi-arid climates might offer sources of genetic material for beneficial mucilage traits.

Study for Nuclide Transfer Ratio of Particles Generated by Thermal Cutting

2006 ◽  
Author(s):  
Yukihiro Iguchi ◽  
Tsutomu Baba ◽  
Hiroto Kawakami
Keyword(s):  
Vapor Pressure ◽  
Pressure Tube ◽  
Work Place ◽  
Nuclear Facilities ◽  
Secondary Products ◽  
Sampling System ◽  
High Vapor Pressure ◽  
Transfer Ratio ◽  
Thermal Cutting ◽  
High Vapor

In dismantling of nuclear facilities, secondary products would disperse into air and water. Thus, it is necessary to assess the effective dose for the public due to the gaseous and liquid radioactive wastes discharged. Especially for the cutting of a highly activated reactor core structures, the material may release special nuclides, some of which can be metal with low melting temperature and relatively high vapor pressure. In this case, the vaporized metal easily transfers to the particles instead of leaving in the dross and would make significant impact to the work place and environment. A pressure-tube type reactor often utilizes zirconium alloy as core structure, which may contains nuclides with high vapor pressure such as radioactive tin or antimony caused by activated tin. In this study, the radioactivity transfer ratio for thermal cutting in air has been investigated by cold tests. The tests have been carried out in an air-tight clean house and used a dust sampling system. The test piece was zirconium and niobium 2.5% alloy with some impurities, which was non-radioactive spare material for the pressure tube of Fugen NPS. Plasma cutting method was carried out with 200 A electric current. The particles were separated by one micrometer size with membrane filters and the material was investigated with an Energy Dispersion X-ray Analyzer (EDX) and the shape of the particle was observed with a Scanning Electron Microscope (SEM). The results showed that there was almost no tin in the dross because most of the tin was evaporated and transferred to aerosol. However, the ratio of zirconium, niobium and iron in the aerosol was not as high as that of tin. The vaporization pressure of antimony is higher than that of tin. The tin can be easily activated by neutron and becomes radioactive antimony. Because Zircalloy-2 or 4 contains ca. 1 percent of tin, irradiated Zircalloy contains significant radioactive antimony (Sb-125). Preparatory analyses showed that the Sb-125 to the environmental impact was comparable with other nuclides. For this reason a test for taking data of the transfer ratio of antimony by using irradiated material has been also carried out.

Experimental Verification of Water Ingress in a Void by Quick Diffusion at High Reflow Temperature

2007 ◽  
Author(s):  
Seungbae Park ◽  
Haojun Zhang ◽  
Changsoo Jang
Keyword(s):  
High Temperature ◽  
Vapor Pressure ◽  
Pressure Sensor ◽  
Element Model ◽  
High Vapor Pressure ◽  
Hygroscopic Properties ◽  
Reflow Temperature ◽  
Polymer Metal ◽  
High Vapor ◽  
Underfill Material

The pop-corning failure is known to result from high vapor pressure generation inside cavities at defective interfaces of the electronic package. In order to study the phenomenon, vapor pressure inside a void at high temperature is measured using a specific specimen configuration developed for this purpose. The specimen incorporates a volume-controllable cavity at a polymer-metal interface. A pressure sensor is used to monitor pressure evolution inside the void at high temperature. An underfill material used in the configuration is characterized in terms of hygroscopic properties. The phenomenon is also simulated on a finite element model based on these properties and specimen geometry. The prediction by the numerical model well matches the measurement by pressure sensor. This corroborates the validity of the hypothesis of high vapor pressure employed in numerous existing studies that simulated the pop-corning failure.

High vapor pressure deficit drives salt-stress-induced rice yield losses in India

2015 ◽  
Vol 21 (4) ◽  
pp. 1668-1678 ◽  
Author(s):  
Jesse Tack ◽  
Rakesh K. Singh ◽  
Lawton L. Nalley ◽  
Basavaraj C. Viraktamath ◽  
Saraswathipura L. Krishnamurthy ◽  
...  
Keyword(s):  
Salt Stress ◽  
Vapor Pressure ◽  
Vapor Pressure Deficit ◽  
Rice Yield ◽  
Yield Losses ◽  
High Vapor Pressure ◽  
High Vapor
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