Patch plants

R = Reparability a plant bought some vessels wdth a new type of plastic lining instead of the one they had used for many years. The new material had better temperature resistance than the old, but when it did need repair, the patches would not stick. In time the problems were overcome, but reparability should have been considered before the change was made. 

In the chemical process industry molybdenum has found use as washers and bolts to patch glass-lined vessels used in sulphuric acid and acid environments where nascent hydrogen is produced. Molybdenum thermocouples and valves have also been used in sulphuric acid applications, and molybdenum alloys have been used as reactor linings in plant used for the production of n-butyl chloride by reactions involving hydrochloric and sulphuric acids at temperatures in excess of 170°C. Miscellaneous applications where molybdenum has been used include the liquid phase Zircex hydrochlorination process, the Van Arkel Iodide process for zirconium production and the Metal Hydrides process for the production of super-pure thorium from thorium iodide. 

These plant responses are largely controlled by the internal status of plant (40). On the other hand, it has been shown that the occurrence of nutrient-rich patches in the soil can trigger changes in root architecture and also in the capacity for nutrient acquisition (46,47). Recent results indicate that this behavior is dependent not only on internal (metabolic) signals but also on the capacity to sense... 

The genetic basis of at least some aspects of the proliferation response has recently been uncovered. Work with Arahidopsis mutants has shown that a nitrate-inducible gene (ANRI) encodes a member of the MADS box family of transcription factors (87). Repression of this gene resulted in plants that no longer responded to nitrate-rich patches. 

D. Robinson and M. M. I. Van Vuuren, Responses of wild plants to nutrient patches in relation to growth rate, Inherent Variation in Plant Growth Physiological Mechanisms and Ecological Consequences (H. Lambers, H. Poorter and M. M. I. van Vuuren, eds.), Backhuys Publishers, Leiden, 1998, p. 237. 

Figure 1. Structure of plastocyanin (2) showing the positions of a-carbon atoms of amino acid residues. The active site and positions of the conserved (plant) negative patch (42-45) and Tyr 83 are indicated (%).

Smiley, R.W., M.C. Fowler, and R.C. O Knefski. 1985. Arsenate herbicide stress and incidence of summer patch on Kentucky bluegrass turfs. Plant Dis. 69 44-48. 

The most frequent causes of allergic contact dermatitis in the United States include plants (poison ivy, poison oak, and poison sumac), metallic salts, organic dyes, plastic resins, rubber additives, and germicides.74 The most common skin patch test allergens found to be positive in patients along with potential sources of exposure are shown in Table 32.1.75 In patients with occupational contact dermatitis who were skin patch tested, the common allergens included carba mix, thiuram mix, formaldehyde, epoxy resin, and nickel.76... 

Experiments have shown that treating with iron sulfate does cause algae to bloom with patches tens of miles long. But when the extra plants... 

At about the same time far to the east in India, physicians were prescribing a strikingly similar regimen for the same condition. Their medication for vitiligo was an infusion of the seeds and roots of a plant known locally as bavachee (Psoralea corylifolia). Patients drank the infusion or applied it directly to their skin. After treatment, Indian patients also exposed their patches of vitiligo to the sun. 

There are no uncoordinated histidine residues in higher plant plastocyanins. However, some algal plastocyanins, including S. obliquus and A. variabilis have a histidine at position 59, which is of particular interest since this lies within the remote acidic patch region [132]. Differences between the two are that whereas S. obliquus PCu(I) is acidic (charge —9), A. variabilis is basic (charge 1-I-). Also S. obliquus has deletions at 57 and 58 with a consequent tightening of the peptide chain in this locality. Fig. 5. Both these plastocyanins were therefore Ru-modified. 

In this sense, weeds are desirable and inevitable plants that colonize barren areas allowing for later overgrowth and succession. The appearance of patches... 

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