Morphological responses

The changes that occur when an organism is exposed to different concentrations of penicillin provides a characteristic morphological response that... 

Those striking bluelight-induced morphological responses such as phototropism, induction of polarity of spores or rearrangement of chloroplasts, are necessarily preceded by metabolic bluelight effects. However, no clear-cut causal reaction chain has yet been elucidated. 

Groeiming BA, Nilsson JC, Hildebrandt PR, et al. Neurohumoral prediction of left-ventricular morphologic response to beta-blockade with metoprolol in chronic left-ventricular systolic heart failure. Eur. J. Heart Fail. 2002 4 635-46. 

Iba T, Sumpio B. Morphological response of human endothelial cells subjected to cyclic strain in vitro. Microvasc Res. 1991 3 841-848. 

Assess morphologic response in target/nontarget tissue. 

Although the processing variables appear to have correlations with morphology, results of impact tests fail to produce a definitive description of the morphological response to impact. However, this problem is shown to be substantially eliminated through the use of instrumented impact testing (17). Such tests measure the time dependence of the impact load borne by the sample and indicate that impact fracture is a... 

It is also clear, and has been established for some time now, that some neurons are susceptible to relatively short periods of ischaemia while others are not. Initially there are changes in the biochemical activity of neurons, in parallel with other cell types, which precede progressive tissue destruction. Although both types of neurons demonstrate similar morphological responses initially, susceptible neurons, perhaps due to differences in the biochemistry of some structural cytoskeletal components, for example, enter a postischaemic pathological cascade culminating in their death between 2 and 4 days and later after the ischaemic episode. However, despite a great deal of work which has attempted to unravel these complex intracellular processes, there is still not a clear and simple overview available. It is also apparent that for... 

Gage, F. H., Armstrong, D. M., Williams, L. R., and Varon, S., Morphological response of axotomized septal neurons to nerve growth factor, J. Comp. Neurol., 269, 147, 1988. 

Fig. 10.21 Acute morphological responses of mtraperitoneal ovarian tumors to PDEA-PEG, free cisplatin, and cisplatin/PDEA-PEG (6h after the injection). Representative histological sections are for tumor tissues from a vehicle control upper panel, asterisks are placed in lumens of blood vessels) and from a cisplatin/PDEA-PEG-treated animal lower panel arrows indicate pyknotic/ condensed cells). Data represent mean SE ( = 4, P < 0.05) [97]...

The important feature of the MEL model is the acclimation of vegetation to maintain a nutritional balance when faced with changes in resource availability, Vc, Vn. By acclimation authors (Bastetter etal, 1997) mean any process that results in a compensatory redistribution of uptake effort in response to a deviation from optimal element ratios in biomass. These processes include not only physiological and morphological responses of individual plants, such as changes in enzyme concentrations in tissue and root shoot ratios, but also genetic adaptation of populations and competitive replacement of species by other species with more favorable distribution of uptake efforts. This aspect is essentially important for the time scale of response. 

Lamont, P.A. and Gage, J.D. (2000) Morphological responses of macrobenthic polychaetes to low oxygen on the Oman continental slope, NW Arabian Sea. Deep-Sea Research II, 47, 9-24. 

Morphological responses of axotomized septal neurons to nerve growth factor. J. Comp. Neurol. 269 147-155. 

Depending on concentration, herbicides may inhibit many different plant metabolic pathways in vitro as well as in vivo. However, often the relevance of an inhibitory activity in vitro for the action on the intact growing plant is not clear. Trifluralin and chlorpropham e.g. affect chloroplast and mitochondrial activities in vitro (J ). In the field, however, they inhibit the growth of seedlings and provoke characteristic morphological responses which can not be traced to the effects on the organelles mentioned above. A simple test system more closely reflecting the primary sensitive pathway under field conditions would therefore clearly be helpful. 

Caprioli, M. (2008). Morphological response of a bdelloid rotifer to desiccation. Journal of Morphology 257, 246-253. 

In polyaniline-cellulose acetate films, phthalate and phosphate plasticizers were used. The addition of the plasticizer increases film flexibihty and lowers percolation threshold. It can be seen by ophcal microscopy that polyaniline grain sizes are reduced. Similar principle was adopted in polymer blend of thermoplastic polymer and polya-niline. Various plasticizers and their concentrahons were used to partially compatibilize blend in such a maimer that it still has domains of different conductivities but a low percolation threshold. Polyvinylchloride and poly(3-octylthiophene) are iimniscible but there is a low interfacial tension which allows to produce co-conhnuous morphology responsible for increased conductivity of blends along with increase in poly(3-octylthiophene) con-centrahon. Addition of DOP to this blend increases its conduchvity even if the concentration of poly(3-octylthiophene) decreases. 

Donnelly, D.P. and Boddy, L. (1998). Developmental and morphological responses of mycelial systems of Stropharia caerulea and Phanerochaete velutina to soil nnirient enrichment. New PhytoL, 138, 519-531. 

FIGURE 32.1 The morphological response of chromatophores isolated from B. splendens, the Siamese fighting fish, upon application of a biologically active agent, (a) Control cells, (b) cells treated with a chemical agent. 

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