Pastoral systems

Sparse (arid) includes oasis farming and scattered irrigation settlements, in many cases used by pastoralists to supplement their livelihoods. The boundary between pastoral systems and sparse farming systems is vague. 

Smith, V. H. (1992). Effects of nitrogemphosphorus supply ratios in nitrogen fixation in agricultural and pastoral systems. Biogeochemistry 18,... 

Middle East - Civilization - To 622. 5. Pastoral systems - Middle East - History - To 1500. 6. Migration, Internal-Middle East - History-To 1500. 7. Sedentary behavior-Middle East - History - To 1500. 8. Social archaeology - Iraq. 9. Social archaeology - Middle East. 10. Archaeology - Methodology. I. Title. 

The Langevin model has been employed extensively in the literature for various numerical and physical reasons. For example, the Langevin framework has been used to eliminate explicit representation of water molecules [22], treat droplet surface effects [23, 24], represent hydration shell models in large systems [25, 26, 27], or enhance sampling [28, 29, 30]. See Pastor s comprehensive review [22]. 

Pastor-Anglada, M., et al. Complex regulation of nucleoside transporter expression in epithelial and immune system cells. Mol. Membr. Biol. 2001, 18, 81-85. 

Venable, R. M., and Pastor, R. W. (2002). Molecular dynamics simulations of water wires in a lipid bilayer and water/octane model systems, J. Chem. Phys., 116, 2663-2664. 

Nevertheless, for the production of the flavour-active aromatic alcohol derivatives, such as the corresponding aldehydes and acids, metabolic engineering approaches have to compete with conventional oxidative biocatalysis starting from the natural alcohol as a substrate. For instance, the whole-cell oxidation system based on Pichia pastor is AOX already described in Sect. 23.4.1.2 can also be used to convert benzyl alcohol to benzaldehyde in aqueous media although product inhibition restricted the final product concentration to about 5 g L h indicating the need for aqueous-organic two-phase reaction media [51]. Phenylacetalde-... 

Nicolaou, K. C. Winssinger, N. Pastor, J. Murphy, F. Solid-Phase Synthesis of Macrocyclic Systems by a Cyclorelease Strategy Application of the Stille Coupling to a Synthesis of (.S )-Zearalenone, Angew. Chem. Int. Ed. Eng. 1998, 37, 2534. 

The synthesis of MCM-41 structure in fluoride medium has been reported by Silva and Pastore [10], who used sodium silicate as silica source and carried out crystallization at 150 °C. They suggested the behaviour of Si02-CTMA+-F system was significantly different from that reported previously on the mesophase system. It is known that fluoride ions do influence the nature, activity and polymerizing capacity of silica precursors, and a fluorinated silica surface is much more hydrophobic and more resistant to the attack of water molecules than a silanol silica surface [11]. 

Sparaco M, Gaeta LM, Tozzi G, Bertini E, Pastore A, Simonati A, Santorelli FM, Piemonte F. 2006. Protein glutathionylation in human central nervous system Potential role in redox regulation of neuronal defense against free radicals. J Neurosci Res 83 256-263. 

Niemi GJ, DeVore P, Detenbeck N, Taylor D, Lima A, Pastor J, Yount JD, Naiman RJ. 1990. Overview of case studies on recovery of aquatic systems from disturbance. Environ Managment 14 571-587. 

The dependence of the calculated surface pressure on other system variables has been investigated too. In simulations applying NPAT conditions, it was demonstrated that the calculated surface tension was somewhat insensitive to changes in the surface area of up to 8 A2 [35]. And Feller and Pastor [41] found that in MD simulations with fixed surface area the calculated surface tension was dependent on the number of phospholipids. The surface tension increased with decreasing system size with values of 33.5, 39.2, and 57.2 dyn/cm for systems of 72, 32, and 18 lipids respectively. 

The call for a new chemical system that combined positive experience and basic axioms of natural philosophy was answered by Herman Boerhaave (1668-1738), a popular professor of medicine, botany, and chemistry at the University of Leyden from 1702 to 1729. ° Son of a country pastor, he was well versed in classical Latin texts before he enrolled as a prospective theology student at the University of Leyden. During the first years of philosophical studies, his versatile intellect was... 

Zou L, Zhou H, Pastore L, Yang K (2000) Prolonged transgene expression mediated by a helper-dependent adenoviral vector (hdAd) in the central nervous system. Mol Ther 2 105-113. 

G. Favaro, G.A. Sacchetto, P. Pastore, M. Fiorani, Liquid chromatographic determination of non-volatile nitrosamines by post-column redox reactions and voltammetric detection at solid electrodes. Study of a flow reactor system based on Ce(IV) reagent, Anal. Chim. Acta 273 (1993) 457. 

P limitation on N2 fixation is widely observed in aquatic systems in terrestrial ecosystems there is good evidence for it from agricultural, pastoral, and some natural systems (Eisele et al, 1989 Smith, 1992 Crews, 1993). The model estimates P availability within a mass-balanced P cycle, with inputs via weathering, outputs via leaching, and a labile adsorbed fraction. Nonfixers are given priority for P, in proportion to the amount of fixed N available. If not enough available P is present to match available N, nonfixers are P limited. If P remains available after nonfixers have taken up what they can, N2 fixers can use it — at a lower C P ratio than that of nonfixers (Pate, 1986), and up to the overall limit to NPP set by light or water availability (Vitousek and Field, 1999). Limitation by other elements (e.g., Mo Silvester, 1989) could be treated similarly. 

---