Vergiftete Gaben:

Transformation of siphon responses during conditioning of Aplysia suggests a model of primitive stimulus-response association.

“…6, and [32][33][34], this model builds a basic form of learning from elementary units of neural plasticity that are shared in different combinations with other forms of learning. In this case, a S-R association is formed by concatenating putative mechanisms of alpha conditioning and pseudoconditioning (11). The actual contribution of the concatenation mechanism and of other potential mechansims, such as Hebb synapses and branch-specific neuromodulation of Scs synapses to MUR (10,24,27), can now be explored intracellularly in the same semi-intact preparation (Fig.…”

“…These observations raised the possibility that procedures used ostensibly for alpha conditioning of siphon withdrawal (3-5) might actually produce a qualitatively new conditioned response (CR). Earlier we found evidence for transformed CRs in the intact animal, using parapodial stimulation as a CS (11). Here I describe conditioning of a new siphon response to a mantle CS in a semi-intact preparation.…”

The characterization of surface films formed on molten magnesium and AZ91D alloy in air/1,1,1,2-tetrafluoroethane atmospheres

“…Because SF 6 can form a thin, coherent and stable film on its surface which can effectively reduce or inhibit the melt further contacting with oxygen in the atmosphere [3,4]. But in the process of SF 6 gas being used, there is a lot of SF 6 gas leftover and decomposition products being released in environment, which will result in serious greenhouse effect and environment pollution [7,8]. With increasing environmental concerns in recent years, the use of SF 6 gas in industries is strict restricted or forbidden in many countries of the world.…”

Hydrocarbon uptake in hydrocarbon fermentations

“…Direct contact between the oil drops and the cells appears to be the mechanism by which most of the substrate is transported. 6 The oil surface area to be contacted includes both the larger oil drops to which the cells adhere and the submicron drops that are adsorbed to the cells. The emulsification of the hydrocarbon-water system has been investigated by several researchers.…”