Periodates structural relations

As proposed earlier, the utilization of structurally related DX motifs, e.g., triangleshaped modules containing an additional ligation arm, should allow the construction of periodic lattices from DNA [78]. Recently, a set of publications demonstrated the feasibility of using DX motifs for DNA nanoconstructions [80-82]. DX-based triangle modules were... 

The first identified Ascaris FaRP, AF1 (KNEFIRFamide), and the structurally related peptide, AF2 (KHEYLRFamide), have been found to inhibit locomotory waves when injected into adult worms (Cowden et al., 1989 Cowden and Stretton, 1993). Their effects on body-wall muscle strips are biphasic, comprising a transient relaxation followed by an extended period of increased contractile activity (Maule et al., 1995b Bowman et al., 1996). When using muscle strips that have had the motor nerve cords removed, only the inhibitory actions of AF1 and AF2 are seen (Maule et al., 1995b). This suggests that the inhibitory phase is due to post-synaptic effects on body-wall muscle in the worm. In contrast, the excitatory effects are nerve-cord dependent and are not observed in muscle strips that have been denervated. Another possibility is that the peptides interact with receptors at the post-synaptic junction - these are also removed in specimens that have had the motor nerve cords removed. 

Several drug classes, including tetracycline, sulfonamide, and quinolone antibiotics, as well as chlorothiazide, chlorpromazine, and amiodarone hydrochloride, have been shown to be photoantigens. Photosensitivity may persist even after withdrawal of the drug, as has been observed with the antiarrhythmic drug amiodarone hydrochloride, since it is lipophilic and can be stored for extended periods in the body fat (Unkovic et al., 1984). In addition, it is quite common for cross-reactions to occur between structurally related drugs of the same class. 

Notes on the crystallography of quasi-periodic structures. A general way to face the problems related to the interpretation of quasi-periodic structures (modulated structures, quasicrystals) is based on the introduction and application of higher-dimensional crystallography (de Wolff 1974, 1977, Janner and Janssen 1980, Yamamoto 1982, 1996, Steurer 1995). 

Structural relations between quasicrystals and other intermetallic phases. As discussed in several sections of the review published by Kelton (1995) on quasicrystals and related structures, numerous studies and observations indicate structural similarities between non-periodic quasicrystal phases with crystalline phases and also, on the other hand, with amorphous, glassy and liquid phases. 

Selke, W. (1989) Long period structures in alloys-statistical mechanics in the ANNNI model and related concepts. In Alloy Phase Stability, eds. Stocks, G.M. and Gonis, A., NATO ASI Series, Series E Applied Sciences (Kluwer Academic Publishers, Boston, USA), Vol. 163, p. 205. 

Quantum dots are the engineered counterparts to inorganic materials such as groups IV, III-V and II-VI semiconductors. These structures are prepared by complex techniques such as molecular beam epitaxy (MBE), lithography or self-assembly, much more complex than the conventional chemical synthesis. Quantum dots are usually termed artificial atoms (OD) with dimensions larger than 20-30 nm, limited by the preparation techniques. Quantum confinement, single electron transport. Coulomb blockade and related quantum effects are revealed with these OD structures (Smith, 1996). 2D arrays of such OD artificial atoms can be achieved leading to artificial periodic structures. 

Ox ocin is a nonapeptide which is structurally related to vasopressin. It stimulates rhythmic uterine contractions and is widely used by intravenous infusion of a diluted solution to induce labour and to treat postpartum bleeding. In large doses, it may cause relaxation of vascular smooth muscle causing hypotension in patients with cardiac disease or who are dehydrated. It has water-retaining properties and when given for prolonged periods to patients whose intake is electrolyte-free it causes overhydration and hyponatraemia. This may result in convulsions in the newborn with the risk of cerebral damage. 

In contrast to the structurally related thiazide diuretics, diazoxide causes renal salt and water retention. However, because the drug is used for short periods only, this is rarely a problem. 

The advent of combinatorial techniques and solid phase organic synthesis may lead to preparation of large numbers of structurally related molecules in short periods of time. This is important especially for the optimization of lead structures in the pharmaceutical industry [40]. It is now well established and documented that the combinatorial technology and solid phase techniques could offer sufficient latitude for preparation of corresponding chemical libraries with broad structural diversity. The diverse potentiality of (3-lactam moiety as specific pharmacophores and scaffolds has attracted ample interests from pharmaceutical industries for the synthetic methods based on polymer-supported techniques. 

THE PERIODIC STRUCTURAL REGULARITIES IN SPECTRA AS RELATED TO THE PERIODIC LAW OF THE CHEMICAL... 

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