The switching off of the synthesis of embryonic hemoglobin (EHb) and the turning on of adult hemoglobin (AHb) synthesis has served as one of several major examples of biochemical differentiation. However, the control mechanisms underlying this transformation remained elusive, except in the case of Rana catesbeiana (Moss & Ingram, 1965, 1968 a, b) where the classical thyroxineinduced metamorphos...

We consider orthogonal upward drawings of directed acyclic graphs with nodes of uniform width but node-specific height. One way to draw such graphs is to use a layering technique as provided by the Sugiyama framework [34]. To overcome one of the drawbacks of the Sugiyama Framework, namely, unnecessary edge crossings caused by an unfortunate layer assignment of the nodes, Chimani et al. integrat...

this paper presents a simplified approach to estimate the resultant force, which should be provided by a retention system, for the equilibrium of unstable slopes. the results were obtained with a developed algorithm, based on limit equilibrium analyses, that assumes a two-part wedge failure mechanism. design charts to obtain equivalent earth pressure coefficients are presented. based on the res...

pesticides are one of the major pollutants in the environment. the residue of pesticides has been reported to be at a critical level in agricultural crops, especially in greenhouse crops. tomato is considered as an important vegetable in iranian food basket and is produced in fields and greenhouses. so, the current study aimed to assess diazinon and oxydemeton-methyl levels in tomatoes sampled ...

the determination of the ultimate pit limit (upl) is the first step in the open pit mine planning process. in this stage that parts of the mineral deposit that are economic to mine are determined. there are several mathematical, heuristic and meta-heuristic algorithms to determine upl. the optimization criterion in these algorithms is maximization of the total profit whilst satisfying the...

petroleum contamination of soil is a serious problem throughout the oil producer countries. vegetation may play an important role in the biodegradation of toxic organic chemicals in soil. for petroleum compounds, the presence of rhizosphere micro flora may accelerate biodegradation of the contaminants. in a greenhouse study, petroleum contaminated soil were treated using phytoremediation . the ...

stability of foundations near slopes is one of the important and complicated problems in geotechnical engineering, which has been investigated by various methods such as limit equilibrium, limit analysis, slip-line, finite element and discrete element. the complexity of this problem is resulted from the combination of two probable failures: foundation failure and overall slope failure. the curr...

limit to the tension reinforcement ratio in flexural high strength reinforced concrete (hsrc) members isbased on the requirement that tension failure as sufficient rotation capacity are ensured at ultimate limit state.however, the provisions for the total amount of longitudinal reinforcement ratio ( and ) are not associated withany rational derivation. in this paper, a quantitative measure to e...