نتایج جستجو برای: rosin modification
تعداد نتایج: 127781 فیلتر نتایج به سال:
The acceptance of public participation in science and technology governance in liberal democratic contexts is evident in the institutionalization of a variety of mechanisms for participation in recent decades. Yet questions remain about the extent to which institutions have actually transformed their policy practice to embrace democratic governance of techno-scientific decision making. A critic...
Abstract In the paper, five quaternary ammonium salts derived from rosin were synthesized, characterized and their antifungal activities against different molds studied. Choline salt tetramethylammonium hydroxide synthesized dehydroabietic acid ethanolamine ester which are new compounds propylene pimaric acid. Their structures confirmed by FTIR, 1 HNMR, 13 CNMR, high resolution mass spectrometr...
hirchsprung’s disease is a developmental disorder of the enteric nervous system, characterized by abdsence of ganglion cell in the myenterric and submucosal plexuese along a variable portion of the distal intestine.the purpose of this study is the presentation of a new procedure for reduction of the postoperative complications of hirschsprung’s disease (hd) by offering a modified swenson’s tech...
background: visceral leishmaniasis is systematic serous parasitic disease with public health importance. zoonotic form of visceral leishmaniasis is wide spread in mediterranean basin and south america regions. direct agglutination test (dat) is an accurate, reliable and non-expensive serological test for the diagnosis of visceral leishmaniasis in human and canines but the antigen preparation i...
chromium (vi) adsorption behavior and capacity by surface modified nanozeolite a has been investigated. surface modification was performed and the morphology of modified and unmodified nanozeolite was studied using scanning electron microscope (sem) and transmission electron microscope (tem). adsorption isotherms were studied under different conditions (ph, adsorbent dose, adsorbate concentrati...
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