Listen Up! The World's Oceans May Be Starting to Warm     

Regalado A 《Science (New York, N.Y.)》1995,268(5216):1436-1437

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Agency chiefs seek help with budgets     

Lawler A 《Science (New York, N.Y.)》1995,267(5195):165

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Italian academic life     

Gavezzotti A 《Science (New York, N.Y.)》1995,267(5200):949

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Self-Assembled Metal Colloid Monolayers: An Approach to SERS Substrates     

Freeman RG  Grabar KC  Allison KJ  Bright RM  Davis JA  Guthrie AP  Hommer MB  Jackson MA  Smith PC  Walter DG  Natan MJ 《Science (New York, N.Y.)》1995,267(5204):1629-1632

The self-assembly of monodisperse gold and silver colloid particles into monolayers on polymer-coated substrates yields macroscopic surfaces that are highly active for surface-enhanced Raman scattering (SERS). Particles are bound to the substrate through multiple bonds between the colloidal metal and functional groups on the polymer such as cyanide (CN), amine (NH(2)), and thiol (SH). Surface evolution, which can be followed in real time by ultraviolet-visible spectroscopy and SERS, can be controlled to yield high reproducibility on both the nanometer and the centimeter scales. On conducting substrates, colloid monolayers are electrochemically addressable and behave like a collection of closely spaced microelectrodes. These favorable properties and the ease of monolayer construction suggest a widespread use for metal colloid-based substrates.  相似文献   

Through the glass lightly     

Bard AJ 《Science (New York, N.Y.)》1995,267(5204):1618-1618

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Report to stress research over close ties to industry     

Lawler A 《Science (New York, N.Y.)》1995,267(5197):446-447

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COBE Seeks Universe's First Blush     

Regalado A 《Science (New York, N.Y.)》1995,268(5213):975-976

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Metallic glasses     

Greer AL 《Science (New York, N.Y.)》1995,267(5206):1947-1953

Amorphous metallic alloys, relative newcomers to the world of glasses, have properties that are unusual for solid metals. The metallic glasses, which exist in a very wide variety of compositions, combine fundamental interest with practical applications. They also serve as precursors for exciting new nanocrystalline materials. Their magnetic (soft and hard) and mechanical properties are of particular interest.  相似文献   

Effects of storage time and freezing temperature on clinical chemical parameters from canine serum and heparinized plasma     

Thoresen SI  Tverdal A  Havre G  Morberg H 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》1995,24(4):129-133

To assess changes in 24 blood constituents in frozen serum and heparinized plasma, blood samples were drawn from 10 clinically normal German Shepherd army dogs. The storage characteristics of nine enzymes (ALP, ALT, amylase, AST, CK, GGT, GLDH, LDH, lipase), and 15 metabolites and minerals (albumin, bile acids, bilirubin, calcium, cholesterol, creatinine, fructosamine, glucose, magnesium, phosphate, potassium, protein, sodium, triglycerides, urea) were studied. Parallel samples of serum and heparinized plasma were stored for 90 and 240 days at two different storage temperatures, -200 degrees C and -700 degrees C. Sixteen of the 24 analytes (ALP, ALT, amylase, AST, CK, GGT, GLDH, LDH, bile acids, calcium, cholesterol, creatinine, fructosamine, magnesium, phosphate, urea) showed statistically significant (p < 0.05) changes during the storage period related to storage time, storage temperature, and sample type. Seven of the analytes (amylase, GGT, GLDH, LDH, bile acids, fructosamine, magnesium) showed changes of possible clinical importance with mean differences from baseline larger than 20% for the enzymes and 10% for the metabolites and minerals during the storage periods.  相似文献   

What Is Your Diagnosis?     

Clyde VL  Schultze AE  Donnell R 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》1995,24(1):5-7

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