BACKGROUND AND AIMS Leaf longevity is an important plant functional trait that often varies with soil nitrogen supply. Ethylene is a classical plant hormone involved in the control of senescence and abscission, but its role in nitrogen-dependent leaf longevity is largely unknown. METHODS Pot and field experiments were performed to examine the effects of nitrogen addition on leaf longevity and...

The industrial state-of-the-art processes to extract tungsten from scheelite (CaWO4) require high pressures and temperatures. These flowsheets consume a large excess of chemicals (which are very hard recycle) generate up 25 tons high-salinity wastewater per ton ammonium paratungstate product. In this work, more sustainable conceptual flowsheet for the recovery high-grade (55.0 wt % W) medium-gr...

A FUNDAMENTAL DIFFICULTY in estimating calcium in serum by photometry arises from the fact that the normal range is narrow relative to the concentration of calcium. In the cases of sodium and chloride which also possess narrow normal ranges, the automation problem has been approached in two different ways. For sodium the Technicon Flame Photometer incorporates an electrical range expander. In t...

Calcium dichloride tetra urea was prepared by the reaction of calcium chloride with urea in aqueous solution. The crystals are monoclinic, a= 7.633, b= 12.45 1, c= 8.118 ?,? = 113.17, Z = 4, space group P 2,/a. The crystal structure was determined by single crystal X-ray methods and refined to R= 0.041. The calcium atoms are coordinated to four oxygen atoms of urea and to two chloride ions....

Exo-polysaccharides like dextran produced by Weissella sp. have a wide range of applications in the food, pharmaceutical and other industries. This biopolymer and its derivatives like iron dextran, clinical dextran are rapidly emerging as a new and industrially important products. Dextran a polymer of glucose is produced using sucrose rich media with nitrogen source. It also requires efficient ...

Owing to the high degree of perishability fruit, peach industry faces serious challenges tackling physiological disorders, microbial/chemical decay, and suboptimal quality fruit during following cold storage. The present study was aimed investigate effects spray applications calcium chloride (CaCl2) at various stages growth development, on ripening, flesh softening, chilling injury (CI) nutriti...

Plants, in common with all organisms, have evolved mechanisms to cope with the problems caused by high temperatures. We examined specifically the involvement of calcium, abscisic acid (ABA), ethylene, and salicylic acid (SA) in the protection against heat-induced oxidative damage in Arabidopsis. Heat caused increased thiobarbituric acid reactive substance levels (an indicator of oxidative damag...