Lotkai proved that the age distribution of any population that is subject, for a sufficiently long time, to constant fertility and mortality becomes fixed. He called this end-product of constant demographic conditions a "stable population", characterized both by an unchanging age distribution and by a fixed annual rate of natural increase. The age distribution of a stable population is jointly ...

the deficiency of wooden resources and rising demand of wood and paper products caused an increasing interest to the lignocellulose resources in the production of paper and wood composite production, such as bagasse. in khuzestan province for build units of wood and paper industries with the approach of using bagasse as a raw material, 6 main indicator and 35 sub-indicator were prioritization. ...

A new catalytic kinetic spectrophotometric procedure for determination of trace quantities of zirconium was proposed. Janus Green was oxidized by potassium bromate and zirconium catalyst which then converted to a colorless product in acidic media. Reaction rate was monitored spectrophotometrically at 606 nm. It relies on the linear relationship between the absorbance difference (ΔAt) and Zr(IV)...

The development of green and safe processes for the synthesis of nanomaterials is one of the main aspects of nanotechnology. In this study, a biological, inexpensive and rapid process for the fabrication of palladium nanoparticles using the aqueous broth of Pistacia Atlantica fruit as a novel biomass product is reported without using extra surfactant, capping agent, and template. The synthesize...

the ionic liquid li(ohch2ch2nh2)(cf3oac) was found to efficiently catalyze the three-component reaction between different enols, aldehydes, and malononitrile , leading to rapid synthesis of 2-amino-4h-chromene derivatives in fairly high yields. the catalyst is easily prepared, highly stable, simple to handle and recycled for several times without significant loss of activity. the method is simp...

The present study reports formulation of a traditionally used poly herbal product for wound healing and its chromatographic analysis by HPTLC. Herbal therapy was the common treatment prescribed by Iranian physicians for wound healing. “Zemad”, the most ancient pharmaceutical dosage form used in the Iranian Traditional Medicine (ITM) for skin diseases. In this study, a poly herbal paste (PHP) wi...

Objective(s): Nanomaterials, especially silver Nanoparticles (Ag-NPs), are employed in an increasing number of commercial products. This has led to an ever growing exposure of human beings to this substance. The first purpose of the Nano Committee of Food and Drug Administration of The Islamic Republic of Iran (IFDA) is developing guidelines to assess and approve commerci...

The present study reports formulation of a traditionally used poly herbal product for wound healing and its chromatographic analysis by HPTLC. Herbal therapy was the common treatment prescribed by Iranian physicians for wound healing. “Zemad”, the most ancient pharmaceutical dosage form used in the Iranian Traditional Medicine (ITM) for skin diseases. In this study, a poly herbal paste (PHP) wi...

Nowadays, plants have been considered as powerful agents for treatment of disorders regarding to their traditional use. In Iranian Traditional Medicine (ITM), plants have a special role in the treatment of various diseases. Burns with their devastating outcomes have been discussed in ITM as well. In the present study, a polyherbal ointment (PHO), retrieved from ITM, was formulated for burn heal...