Trefoil

T. Schlick and W. K. Olson. Trefoil knotting revealed by molecular dynamics simulations of supercoiled DNA. Science, 257 1110-1115, 1992. 

Helping to propel capacities upward has been the advent of greatly improved preheaters, which partially calcine the stone and significantly improve thermal efficiency. Modem preheaters improve capacity by 15—20% and decrease fuel consumption a similar percentage. Other kiln appurtenances and accessories that enhance efficiency and lime quahty are the contact coolers, and such kiln internals as metal refractory trefoil systems that act as heat exchangers, dams, and lifters. 

Fig. 3. Representation of the nine principal folds which recur in protein stmctures, where the codes of the representative proteins taken from the Brookhaven Protein Data Bank (PDB) (17) are given in parentheses (18) (1) globin (Ithb) (2) trefoil (lilb) (3) up—down (256b) (4) immunoglobulin folds...

Table A16.20 Rating factors for single core cable in trefoil circuits laid on open racks in air...

Table A16.23 Group rating factors for circuiis of three single core cables in trefoil and touching, horizontal formation laid directly ...

Table A16.26 Rating factors for variation in thermal resistivity of soil, three single-core cables laid directly in the ground (three cables in trefoil, touching)...

Provide barriers for identification and display of appropriate warning notices, e.g. Trefoil symbol. 

Amyl Salicylate.—All the perfumes of the orchid type, and many of the Trifle variety, have amyl salicylate as one of their most important bases. The ester is known under the names orchid e, trefle or trefoil, and artificial orchid essence. It is used to a considerable extent in artificial perfumery. It is a colourless liquid of the formula... 

Drei-bein, n. tripod. blatt, n. trefoil. dreibliUterigi a. three-leaved,... 

Hasen-klee, m. rabbit-foot clover, hare s-foot trefoil, -kohl, m. wood sorrel, -ohrlein, n. hare s-ear (Bupleurum). -schwanz, m, hare s-tail grass. 

Hom-klee, m. bird s-foot trefoil (Lotus corni-culatus). -kobalt, n. asbolite. -Ibffel, m. horn spoon, -mohn, m. horn poppy (Glau-cium). -quecksilber, n. horn quicksilver (native mercurous chloride), -schicht, /. horny layer, specif, epidermis, -silber, n. horn silver (cerargyrite). -spatel, m. horn spatula, -stein, m. homstone (variety of quartz). 

Klee, m. clover, trefoil. — ewiger Luzemer —, alfalfa, lucem. — spa scher —, tiir-kischer —, sainfoin. 

Figure 1-5A. Pictorial sections flow diagram for principal operations phosphate recovery. By permission, Deco Trefoil, 1958, Denver Equipment Co.

State, as shown in Fig. 10.8 [65]. The "trefoil bonding state, previously proposed and predicted to exist in aromatic hydrocarbon annulene molecules, is finally encountered, albeit in an extended intermetallic network [65]. This also highlights the important role of interactions between incompletely filled lone pairs in the stabilization of low-dimensional anion structures. 

Toxicity of Tall Fescue Leachates to Rape (Brassica nigra L.) and Birdsfoot trefoil (Lotus comlculatus L.)... 

The leachates did not affect total percent germination of rape and birds foot trefoil seeds (Table I), and all trefoil seedlings had... 

Table I. Germination of rape and birdsfoot trefoil seeds in petri dishes containing fescue extracts ...

Table II. Germination and root growth of rape and birds foot trefoil seedlings exposed for 5 days to various concentrations of fescue extracts ...

Both root and leaf leachates reduced germination of birdsfoot trefoil seeds. The root lengths of rape seedlings were reduced by all concentrations of leachate from fescue roots and leaves. As the concentrations of fescue leachate increased, root growth of rape was reduced. The leachate had no significant effect on the root length of birdsfoot trefoil roots. 

After 15 days, the plants were harvested and the length of tops and roots were measured. Each treatment was replicated four times. Rape and blrdsfoot trefoil seedlings growing in nutrient solution containing extracts of fescue leaves and roots had shorter shoots and roots than when grown without these extracts (Table III). Ex-... 

Table VI. Percent germination of birdsfoot trefoil and red clover seeds exposed to leaf extracts of tall fescue genotypes ...

An additional study was done to determine the effects of tall fescue leachates on the growth of birdsfoot trefoil. The genotypes 237, 360 and 698 appeared to have the greatest inhibition on germination in the previous test so leaves of these plants were cut from the roots and soaked in distilled water for 24 hours. Ratios of 3, 5 and 10 g of leaves per 100 ml of distilled water were used. 

Dry weights of birdsfoot trefoil roots and shoots were retarded by the 10 g concentration of genotypes 360 and 698 as compared with the control (Table VII). Other treatments had no significant effect on root weight. 

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