Results 71 to 80 of about 4,580 (149)

Derivatives of piperazine [PDF]

open access: yes, 1928
The preparation of optically active bases will prove conclusively the trihedral distribution of the valencies of trivalent nitrogen. All the aromatic derivatives of this type which have been prepared hitherto have proved to beunsatisfactory for further ...
Thorn, Vera M.
core  

Planetary biology and microbial ecology. Biochemistry of carbon and early life [PDF]

open access: yes
Experiments made with cyanobacteria, phototrophic bacteria, and methanogenic bacteria are detailed. Significant carbon isotope fractionation data is included.
Margulis, L., Nealson, K. H., Taylor, I.
core   +1 more source

Environmental Friendly Alternative Methods for the Recovery of Intracellular Polyhydroxyalkanoates (PHA) [PDF]

open access: yes, 2005
Polyhydroxyalkanoates (PHA) are intracellular polymers that can be produced by bacteria as energy reserve material. This biodegradable material has properties similar to synthetic thermoplastics.
Voon, Pooi Tee
core  

Symbiotic Performance of Diverse Frankia Strains on Salt-Stressed Casuarina glauca and Casuarina equisetifolia Plants [PDF]

open access: yes, 2016
Symbiotic nitrogen-fixing associations between Casuarina trees and the actinobacteria Frankia are widely used in agroforestry in particular for salinized land reclamation.
Champion, Antony   +11 more
core   +1 more source

CO2 mobility control using CO2 philic surfactant for enhanced oil recovery [PDF]

open access: yes, 2015
Isa M. Tan   +5 more
core   +1 more source

Laboratory Investigation on the Effects of Different Types of Surfactants on the Wettability Characteristics of Malaysian Coal for CBM Study [PDF]

open access: yes, 2015
Application of surfactant in CBM production has been steadily recognised. Surfactant acts as a wetting agent which helps to lower surface tension of coal bed groundwater, thus decreasing reservoir pressure to allow CBM production.
Mohd Razlin, Nor Azalina
core  

Does Misery Love Company? Evidence from pharmaceutical markets before and after the Orphan Drug Act [PDF]

open access: yes
With substantial fixed costs of drug development, more common conditions can support more products. If additional pharmaceutical products are beneficial, they will attract greater consumption and promote better health, e.g. greater longevity.
Frank R. Lichtenberg, Joel Waldfogel
core  

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