according to the rules of quadruplet relations between concepts, muslim logicians have proved that relation between the negations of two concepts which are equal (musawi) or absolute-general-and-specific (‘amm wa khas-e mutlaq) are, respectively, equal and absolute-specific-and-general; but these rules come across some problems when the most inclusive concepts are involved, since the negation o...

Container-grown black spruce (Picea mariana (Mill.) B.S.P.) seedlings were planted in trays containing a sand and peat mixture, and placed in a climate-controlled greenhouse. One group of seedlings was kept well-watered, and another group was subjected to three cycles of drought. Gas exchange analysis showed that mesophyll photosynthetic function was largely unimpaired by drought. In contrast, ...

Spring soft wheat is a primary agricultural crop of North Kazakhstan, the growing process which done in harsh weather conditions due to fact, that early spring drought and biggest rainfalls at end June beginning July, are normal region. Due this scientists producers have mistakenly believed Northern region, should be sown later, adjusting main phase plant development “tillering – stem elongatio...

Rapid climate change will impose strong directional selection pressures on natural plant populations. Climate-linked genetic variation in natural populations indicates that an evolutionary response is possible. We investigated such a response by comparing individuals subjected to elevated drought and warming treatments with individuals establishing in an unmanipulated climate within the same po...

Peatlands are a key component of the global carbon cycle. Chronologies of peatland initiation are typically based on compiled basal peat radiocarbon (14C) dates and frequency histograms of binned calibrated age ranges. However, such compilations are problematic because poor quality 14C dates are commonly included and because frequency histograms of binned age ranges introduce chronological arte...

This paper deals with the existence and asymptotic behavior of the solutions to the singularly perturbed second-order nonlinear differential equations. For example, feedback control problems, such as the steady states of the thermostats, where the controllers add or remove heat, depending upon the temperature detected by the sensors in other places, can be interpreted with a secondorder ordinar...