One of the most important practices in flue-cured tobacco farming is topping and sucker control at the right time. Topping cause's development and root growth, drought tolerance, reduce deployment pests, increased synthesis of nicotine. This study was conducted in randomized complete block design (RCBD) with 10 treatments in 3 replications over two years (2008-2009) at Tirtash research and educ...

milk thistle is used traditionally as a hepaprotective agent and supportive treatment of liver disorders. the most problems in milk thistle harvest are tall height, seed shedding and being spinous. in this trial, effects of 3 native populations (p1: isfahan violet flower, p 2: ahvaz white flower and p3: ahvaz violet flower) and 3 topping levels (t1:control, t2: topping in 7 leaves stage and t3:...

Manual removal of the main stem tips cotton (Gossypium hirsutum L.) is a traditional topping approach in China. However, chemical has become an inevitable trend. Therefore, it great significance to study effect and appropriate concentration agents for advancement whole process mechanization management technology. A two-year field experiment was conducted evaluate effects different methods on yi...

A mismatch between the fuel combustion temperature 2250 K (adiabatic) and the high pressure steam temperature up to 900 K, results in a large amount of thermodynamic losses in steam turbine (ST) cycles. A solid-state thermoelectric (TE) placed on top of a ST cycle will produce additional electrical power. By selecting the right materials for the TE generator for high temperature operation, the ...

Refrigeration cogeneration systems which generate power alongside with cooling improve energy utilization significantly, because such systems offer a more reasonable arrangement of energy and exergy ‘‘flows’’ within the system, which results in lower fuel consumption as compared to the separate generation of power and cooling or heating. This paper proposes several novel systems of that type, b...

The nuclear protein kinase ATR is a key regulator of genome integrity that functions at checkpoints for damaged or incompletely replicated DNA. In this issue of Cell, Kumagai et al. (2006) shed light on the molecular mechanism that controls ATR. They report that a physical interaction between ATR and a distinct domain of TopBP1 greatly enhances ATR kinase activity.