DSpace Home
→
Recent submissions

Pastic Digital Repository: Recent submissions

Now showing items 181-200 of 18183

Synthesis, Characterization and Antitumor Activities of 1,1`-Diacetylferrocene Dihydrazone Containing a Salicylaldehyde Moiety and its Complexes with Pd(II) and Pt(II)

Wael Hussein Hegazy; Yasair Suliman Al Faiyz (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

A ferrocenyl ligand was prepared from condensation of 1,1`-diacetylferrocene dihydrazone with salicylaldehyde. Ligand forms 1:1 complexes with Pd(II) and Pt(II) in good yield. Characterization of the ligand and complexes ...
Preparation and Characterization of Magnesium Phthalocyanines Nanoparticles: Effect of Surfactant on the Shape and Size of Nanoparticles

Abdullah Mohamed, Asziri; Maha Moteb, Al-Otaibi; Reda Muhammad, El-Shishtawy; Khalid Ahmad, Alamry; Sher Bahadar, Khan (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

Magnesium phthalocyanine nanoparticles (MgPc) were developed in aqueous phase and the effect of anionic, cationic and non-ionic surfactant on the preparation of nanoparticles was evaluated. The sonication time, concentration ...
Analysis of Samarium and Europium in Wheat by ICP-MS after On-Line Separation and Preconcentration

Yong Zhang; Zhihua Ning; Luzhi Sui; Hao Zhong (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

Europium and Samarium in wheat were determined by inductively coupled plasma mass spectrometry (ICP-MS) after flow injection on-line separation and preconcentration with P507 resin micro-column. The enhancement factors of ...
Molten Salt Synthesis of Iron Oxide Modified Attapulgite for Catalytic Oxidation of Elemental Mercury

Yu Lu; Jing Ling, Shao; Hui Cang; Fen Nv Han; Zhi Dong, Chen; Qi Xu (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

IIron oxide modified attapulgite (Fe₂O₃-ATP) catalysts, with special network structure, were prepared by molten salt method, and were applied to investigate Hg⁰ oxidation ability in simulated flue gas from 100 to 260°C. ...
Simultaneous Determination of Five Flavonoids in Saussurea involucrata by Capillary Electrophoresis

Yumei Li; Hao Zhong (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

A method of determination of five flavonoids in Saussurea involucrata by β-cyclodextrin modified capillary zone electrophoresis has been developed．The effects of buffer pH and buffer concentration, applied voltage and β-CD ...
Preparation of Amine Functionalized Porous Silica by Ultrasonic Technique for the Methylation Reaction of Phenol with Dimethyl Carbonate

Xuehong Zhang; Shubin Liu; Yanlei Gao; Yunxiao Zhang; Lei Ren; Ruisheng Hu; Rufen Chen (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

Amine functionalized silica catalysts, including (3-aminopropyltrimethoxysilane (APTMS)) NH2/SiO2, (Diazabicycloundecene/SiO2) DBU/SiO2 and (1, 5, 7-triazabicyclo [4, 4, 0] dec-5-ene/SiO2) TBD/SiO2, which were characterized ...
Study of Composite Carrier Based on Organic and Inorganic Polymers

Bates Malikovna, Kudaibergenova; Marat Kianovich, Beisebekov; Shynar Nurlanovna, Zhumagalieva; Madiar Maratovich, Beisebekov; Zharylkasyn Abduachitovich, Abilov; Muhammad Iqbal, Chaudhary (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

In this work, the possibility of obtaining composites on the basis of polyvinyl alcohol and bentonite clay Manrak deposit has been investigated. The interaction of polyvinyl alcohol with bentonite clay was studied by ...
Physichemical Properties of Different Corn Varieties by Principal Components Analysis and Cluster Analysis

Jie Zeng; Haiyan Gao; Guanglei Li; Junliang Sun (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

Principal components analysis and cluster analysis were used to investigate the properties of different corn varieties. The chemical compositions and some properties of corn flour which processed by drying milling were ...
Determination of Synthetic Phenolic Antioxidants in Cake by HPLC/DAD after Mixed Micelle–Mediated Cloud Point Extraction

Peijin Wang; Dongling Meng; Chang liu; Yaling Yang (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

A mixed micelle-mediated cloud point extraction (MMCPE) system was developed for the extraction and preconcentration of four synthetic phenolic antioxidants (SPAs) (propyl gallate (PG), tert-butylhydroquinone (TBHQ), ...
Simultaneous Separation and Purification of Tea Bioactives from summer Green Tea by Column Chromatography

Xin Zhang; Shi Cheng Lei; Saqib Jabbar; Bing Hu; Yi Sun; Xiao Xiong Zeng (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

In the present study, feasibility of producing high quality of tea polyphenols, theanine and caffeine from the extract of summer green tea by column chromatography was investigated. Crude extract of summer green tea obtained ...
Combined Influence of Extraction Parameters on Degree of Esterification of Sugar Beet Pulp Pectin: A Preliminary Study

Deqiang Li; Jianjiang Shang; Xinfang Ma; Xiaoyan Zhu; Zhiyong Liu (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

A Box-Behnken design was employed to study the combined effects of variables of microwave-assisted extraction on pectin from sugar beet pulp. The independent variables were time and power of microwave-assisted extraction, ...
Optimizing Removal of COD from Water by Catalytic Ozonation of Cephalexin Using Response Surface Methodology

Javaid Akhtar; Noraishah Saidina Amin; Muhammad Khurram Zahoor (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

Response surface methodology (RSM) has been used to optimize the effect of circulation rates, ozone supply, cephalexin (CEX) concentration, and granular activated carbon (GAC) dose on removal of COD from solution. According ...
Quality Assessment of Potable Water of Khairpur City

TAJNEES PIRZADA; MIR MUNSIF TALPUR; AHMED DIN RAJPER; MUHAMMAD RAZASHAH; SHAHID NASEEM (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)

This study is conducted to analyze the quality of potable water resources available to the inhabitants of Khairpur city. Eight sites of ground water and six sites of surface water are selected along the study area. The ...
REMOVAL OF MUREXIDE (DYE) FROM AQUEOUS MEDIA USING RICE HUSK AS AN ADSORBENT

Rabia Rehman; Jamil Anwar; Tariq Mahmud; Muhammad Salman; Umer Shafique; Waheed-Uz-Zaman (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)

The use of low-cost and ecofriendly adsorbent was investigated as an ideal alternative to the current expensive methods of removing dyes from wastewater. Rice husk was used as an adsorbent for the removal of Murexide from ...
Phytoremediation of Pb(II) by Jasminum sambac

NASIRA PERVEEN; MUHAMMAD ASIF, HANIF; SHAMAILA NOUREEN; TARIQ MAHMOOD, ANSARI; HAQ NAWAZ, BHATTI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)

Experiments were conducted to asses Pb(II) bioaccumulation in Jasminum sambac cultivated in a green house under controlled conditions. For this purpose Jasminum sambac plants were cultivated and irrigated with industrial ...
FACILE SYNTHESES OF BIOACTIVE 5-ARYLIDENETHIOBARBITURIC ACIDS

Ahsan Sharif; Ejaz Ahmad; Munawar Ali Munawar; Shamsa Jabeen; Misbah-ul-Ain, Khan; Robina Begum; Aleeza Farrukh; Muhammad Ashraf; Shafia Arshad; Nighat Afza (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)

A simple and green chemistry route for the preparation of 5- arylidenethiobarbituric acids has been developed by Knoevenagel condensation of thiobarbituric acid with different aromatic and heteroaromatic aldehydes using ...
SYNTHESIS AND THERMAL STUDIES OF SOME EPOXY SYSTEMS CURED WITH AROMATIC DIAMINES

Naila Khalid; Muhammad Saif Ullah, Khan; Humaira Masood, Siddiqui; Zareen Akhtar; Naseer Iqbal (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)

Some aromatic diamines having flexible ether linkages with variable aliphatic and aromatic character were synthesized via Williamson’s method and used as curing agents in their solution phase and/or molten state for a ...
HIGHLY SOLUBLE POLYOXYETHYLENE-PERYLENE DIIMIDE: OPTICAL, ELECTROCHEMICAL AND PHOTOVOLTAIC STUDIES

O. Hakli Birel; Ceylan Zafar; Haluk Dinclap; Banu Aydin; Mustafa Can (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)

The synthesis and optical properties of a new dye molecule [PERKAT] were reported. The molecular structure of PERKAT was characterized by FT-IR and ¹H NMR. Optical properties of PERKAT were investigated by UV-Vis absorption, ...
COPOLYMERS OF 4 -METHOXYBENZYL METHACRYLATE AND ISOBORNYL METHACRYLATE: SYNTHESIS, CHARACTERIZATION AND DETERMINATION OF MONOMER REACTIVITY RATIOS

Esin Kaya (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2011-08-20)

Homopolymerization of 4-methoxybenzyl methacrylate (MBMA) and copolymerization with isobornyl methacrylate (IBMA) by the atom transfer radical polymerization method (ATRP) were performed at 90 °C. The homopolymer [poly(MBMA)] ...

Now showing items 181-200 of 18183

Search DSpace

Advanced Search

Browse

All of DSpace

Recently added

Pastic Digital Repository: Recent submissions

Search DSpace

Browse

All of DSpace

My Account