THE APPLICATION OF CHEMISTRY IN ENVIRONMENT
Year:2013 | Volume:4 | Issue:14|Papers Count:8

In this Paper, Activated Nano-Graphene Hase Been Used As A Sorbent for The Removal of 4-Chloro-2- Nitrophenol From Aqueous Solutions. The Process of Removal Has Been Optimized for Different Parameters Like Initial Concentration Of 4-Chloro-2-Nitrophenol, Contact Time, Ph, Adsorbent Dose, and Temperature. Also, Phzpc Of The Adsorbent Was Determined. Results Showed That Equilibrium Was Achieved in 20 Min and Removal Of 4-Chloro-2-Nitrophenol Increased By Increasing of Adsorbent Dosage And Temperature. The Experimental Results Indicate That 0.004 g/250 Ml of Activated Nano-Graphene Was Able To Remove 97.55% of 4-Chloro-2-Nitrophenol From An Initial Concentration of 10 Mg L-1 At Ph Of Solution.

An Efficient and Direct Protocol is Described for the Preparation of 1-Substituted 1H-1,2,3,4-Tetrazoles by the Reaction of Primary Amines, Triethyl Orthoformate and Sodium Azide in the Presence of Catalytic Amount of Silica-Supported Perchloric Acid Under Solvent-free and heterogeneous conditions. The thermal solvent-free green procedure offers advantages such as simple methodology, easy work-up, high yield, recovery and reusability of catalyst.

The Gel Content in Initial Poly Butadiene Reduces the Chemical Bonding and Adhesion during the Production and Curing Process and Causes the Groove Cracking. therefore in This Study, The Thermal Decomposition of the Polymer PBR was studied by Methods STA In 0-650oC. Thermal Behavior of Poly Butadiene Different Samples Were Studied and Analyzed. DSC Curves Showed A Network Building. Physico-Mechanical Properties of Rubber Compounds Based on BR Were Measured. The Results showed that there is A Good Correlation between Physicco-Mechanical and Groove Cracking of Tire Tread with the Percentages of Gel Content of Different Type of Initial PBR.

A New Method for the Synthesis of Aryl Nitriles Has Been Developed by the Cyanation of Aryl Bromides with K4Fe (CN) 6as A Cyanide Source In The Presence Of Cu (Oac) 2.H2O As An Inexpensive Catalyst And A 1,3- Phenylene-Bis-(1H)-Tetrazole Ligand. This Method Has The Advantages Of High Yield, Simple Methodology And Easy Work-Up.

Origanum Vulgare L. and Origanum Majorana L. are important species of the genus Origanum which is belong to the family of Lamiaceae (Labiatae). Mentioned species were collected from Arasbaran protected areas- Ainaloo Mountain. Essential oils were obtained from these two plants by the method of direct hot water distilation in a Clevenger, were dried over anhydrous sodium sulfate and analyzed by GC/MS.Keyword: Schiff base, macrocycle, supramolcule, transition metal complex.

New tetradentate Schiff Base Ligand 4-[4’-(3-Hydroxy-1-Methyl-but-2-Enylideneamino)-Methylen-Phenyl-Methylen-4-Ylimino]-Pent-2-en-2-ol), have been Synthesized from Condensation Aminomethyl Benzene and Acetylacetone in Ethanol. Reaction of Prepared Ligand with Fe(III) and Ni(III) Ions, Produced the (I)[(Ni)2(L)2] and (II)[Fe2(L)(Cl)2] with Yield of 78% and 81% Recpectively. The Prepared Complexes were Characterized by 13C-NMR,1H-NMR,IR and Elemental Analysis. In Complex (I) the Results Shows that Two Nickel Ions are connected to Two Chain of Ligand with Square Planar Array around Each Nickel ion and in Complex (II) Two Iron ions are connected to an Octahedral like Chain of Ligand Around Each Iron ion.

The aim of this research was to the antibacterial effects of essential oils (EOs) of Lemon balm (Melissa officinalis L.). Lemon balm is one of the important medicinal plants species, member of Lamiaceae (formerly Labiatae) family. Aerial parts plant collected in Knowledge Based Research Station researchers, drug companies green and after drying, the extract was used for. The chemical composition was determined by hydro-distillation. Antibacterial activity essential oils against a panel of microorganisms including 5 bacteria strains (3 Grampositive and 2 Gram-negative), were assessed by disc diffusion method and broth micro dilution method. The essential oils showed antibacterial activity against the Gram-positive bacteria. The essential oil was more than 30mm on Gram-positive bacteria, however, It effact strong against then bacteria and also, Comparison of essential oil showed antibacterial activity against Gram-positive bacteria, the essential oil have been effective to these microorganisms. But its effects were relatively less. The results showed the study of antibacterial activity of essential oil Lemon balm plant against bacterias was not to same Inhibition zone. More inhibition zone was because effect of essential oil against S. aureus bacteria and less effect was against S. marcescens bacteria. The essential oil of Lemon balm can be used for treatment of some diseases.

A new method for the synthesis of formamides has been developed by the N-formylation of amines with formicacid in the presence of nano cerium oxide as an efficient and recyclable catalyst under ultrasound irradiation. The reaction system is remarkably simple and environmentally benign.