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Now showing items 101-120 of 18183

Optimization of Acid-Activated Bentonites on Bleaching of Cotton Oil

ORAL LACIN; ENES SAYAN; ELIF GULSAH KIRALI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-07-01)

Bentonites are commonly used adsorbent on bleaching cotton oil to produce edible oil products. Bleaching capacities of neutralized cotton oil were investigated with acid-activated Arguvan and Kurşunlu bentonites. Two models ...
PROPERTY OF NOVEL SODIUM ION EXCHANGER LI₁.₄CR₀.₂AL₀.₂TI₁.₆(PO₄)₃

JIAN- ZHI SUN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-04)

A novel sodium specific kind of ion exchanger LI₁.₄CR₀.₂AL₀.₂TI₁.₆(PO₄)₃ fabricated by a solid-state reaction method. The microstructure XRD, FTIR, Raman spectra, adsorption performances were investigated. The average grain ...
Synthesis, Characterization and in vitro Antibacterial Studies of Ternary Complexes using Quinolone Antibiotics as Primary Ligand

MUHAMMAD IMRAN; TABINDA KOKAB; SHOOMAILA LATIF; MTTU LIVIU; ZAID MAHMOOD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-04-16)

Some new first row transition metal ternary complexes of quinolone antibiotics (Levofloxacin, Moxifloxacin) and 1,10-phenenthroline were prepared and characterized on the basis of UV-Vis spectroscopy, IR spectral data, ...
2,7-DICHLOROFLUORESCEIN: A SUITABLE COMPLEXING AGENT FOR THE SPECTROPHOTOMETRIC DETERMINATION OF OFLOXACIN IN PURE AND PHARMACEUTICAL DOSAGE FORMS

SYED HASNAIN ALI; AZIZ UR REHMAN; MUHAMMAD JAHANGIR; SABAHAT ZAHRA SIDDIQUI; MUHAMMAD ASHFAQ; MUHAMMAD ZAHID QURESHI; MUHAMMAD ATHAR ABBASI; VIQAR UDDIN AHMAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi, 2010-04-02)

Ofloxacin is a broad spectrum antibiotic effective against many Gram positive and Gram negative bacteria as well as for some key anaerobes. Ofloxacin was reacted with 2,7-dichloroflourescein in an acidified medium at room ...
Phytochemical Screening, Total Phenolic Contents and Biological Evaluation of Aerial Parts of Nepeta praetervisa

Ghulam Fareed; Nighat Afza; Abdul Malik; Muhammad AliVersiani; Nazia Fareed; Mehreen Lateef; Lubna Iqbal; Uzma Rasheed Mughal; Rasool Bakhsh Tareen (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-10-20)

This study was designed to explore the phytochemical screening, total phenolic contents, radical scavenging potential and urease inhibitory activities in various fractions of the aerial parts of Nepeta praetervisa. ...
Naturally Occurring Antifungal Aromatic Esters and Amides

MUHAMMAD SHAIQ ALI; SHAHNAZ; SOBIA TABASSUM; MUHAMMAD KASHIF PERVEZ; ISIAKA AJANI OGUNWANDE; OLADOSU ADEBAYO IBRAHIM (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

During the search of antifungal natural products from terrestrial plants, a new long chained aromatic ester named grandiflorate (1) along with spatazoate (2) from Portulaca grandiflora and N-[2-methoxy-2-(4-methoxyphenyl) ...
Review on Properties, Dispersion and Toxicology of Carbon Nanotubes

KHALID SAEED (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

Carbon nanotubes (CNTs) have the most intensely studied nanostructures because of their unique properties. There are two types of carbon nanotubes CNTs, single-walled carbon nanotubes (SWNTs) and multi-walled carbon nanotubes ...
Strategies for Low-Cost Water Defluoridation of Drinking Water-A Review of Progress

AMIR HAIDER MALIK; SADIA NASREEN; QAISAR MAHMOOD; ZAHID MAHMOOD KHAN; RIZWANA SARWAR; GHULAM JILANI; AFSAR KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

One of the biggest challenges of 21st century is to ensure safe drinking water-supplies and environmental sanitation which are vital for protecting the environment, improving health and alleviating poverty. Natural ...
Organochlorine Pesticides (OCPs) Contaminants in Sediments from Karachi Harbour, Pakistan

NUZHAT KHAN; JOCHEN MULLER; SHAUKAT HAYAT KHAN; SHAHID AMJAD; SHAFI NIZAMANI; MUHAMMAD IQBAL BHANGER (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

Mangrove swamps, intertidal mudflats and creeks of backwaters represent main feature of Karachi harbour area. Karachi harbour sediment is under continuous influence of untreated industrial effluents and domestic waste ...
Spectrophotometric Method for Quantification of Fenoxaprop-p-ethyl Herbicide in Commercial Formulations and Agricultural Samples

JASMIN SHAH; MUHAMMAD RASUL JAN; FARHAT-UN-NISA SHEHZAD; MIAN MUHAMMAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

A simple spectrophotometric method was developed for determination of fenoxaprop-p-ethyl herbicide in agricultural samples. The method is based on the acid hydrolysis of fenoxaprop-p-ethyl to form 6-chloro-2,3-dihydroben ...
Characterization of Foot-and-Mouth Disease Virus's Viral Peptides with LC-ESI-MS

ZAFER OMER OZDEMIR; MESUT KARAHAN; ERDEM KARABULUT; ZEYNEP MUSTAFAEVA (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

Peptides and proteins play a central role in numerous biological and physiological processes in living organisms. Viral capsid peptides are part of the viruses' outer shell of genetic materials. Viruses are recognized by ...
Preparation of High Exhaust Chrome from Leather Shavings and Hydrocarbons with its Application in Leather Processing for Green Tanning Technology

HAFIZ RUB NAWAZ; BARKAT ALI SOLANGI; UZMA NADEEM; BEENA ZEHRA (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

The use of chrome in tanning has made the remarkable advances to achieve the best quality and quantity of leather. But the chrome tanning process is associated with the generation of heavy metal containing solid wastes and ...
Studies on the Preparation of Sea buckthorn (Hippophae rhamnoides L.) Powder I)rink and Its Nutritional Evaluation

ARSHAD HUSSAIN; JAVED ALI; SHAFQAT ULLAH; HAMIDA ABID (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

The pulp of sea buckthorn (Hippophae rhamnoides L) fruit was processed to obtain different concentrations (11.8°, 33°, 66° & 75° brix) used for the preparation of sea buckthorn powder drinks. Various parameters of the ...
Maclafferty Rearrangement in Germyl Derivatives of Organo-tin Carboxylates

MUHAMMAD AZIZ CHOUDHARY; KHAWAJA ANSAR YASIN; HABIB-UR-REHMAN; SADIQ-UR-REHMAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

Bimetallic compounds of general formula [(R¹)₃GeCHR²CHR³COO]₂Sn[R⁴]₂and [R¹GeCHR²CHR³COO]Sn[CH₂C(CH₃)]₃ have been synthesized by the reported methods and were studied by mass spectrometric analysis to explore their ...
SYNTHESIS OF ETHYL-4,6-DIHYDROXY-2-OXO-1-PHENYL-5-ARYLAZOPYRIDINE-3-CARBOXYLATE, PART (IV): NEW DISPERSE DYES

KHAN, KHALID MOHAMMED; MAHWISH; ABDUL JABBAR; SHAHNAZ PARVEEN; RASHEEDA PARVEEN; SYED MOAZZAM HAIDER (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

The reaction of ethyl-4,6-dihydroxy-2-oxo-1-phenyl pyridine-3-carboxylate (3) with different diazotized substituted aromatic amine (2) yielded compound ethyl-4,6-dihydroxy-2-oxo-1-phenyl-5-arylazopyridine-3-carboxylate (4) ...
SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL STUDIES OF 2-(4-NITROPHENYLAMINO-CARBONYL)BENZOIC ACID AND ITS COMPLEXES WITH CR(III), CO(II), NI(II), CU(II) AND ZN(II)

MUHAMMAD IMRAN; SUMAIRA NAZIR; SHOOMAILA LATIF; ZAID MAHMOOD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

Cr(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes of 2-(4-Nitrophenylaminocarbo-nyl)benzoic acid were synthesized and characterized on the basis of physical, analytical and spectroscopic data. The ligands, as well as ...
Effect of "Oxygen and Carbon-dioxide" on the Post-Harvest Management in Tree-Ripe Mango Storage

HAMEED ULLAH; SAEED AHMAD; THOMPSON, ANTHONY KEITH; RAHEEL ANWAR; NOOR-UN-NISA MEMON; MUHAMMAD NAFEES (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

There is an increasing niche market demand for tree-ripe mango fruit due to their pleasant level of sweetness and flavour than artificially ripened fruits. However, tree-ripe mango fruits normally have a short storage ...
Chemical Activation of Bagasse Ash in Cementitious System and its Impact on Strength Development

NOOR-UL-AMIN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

The production of bagasse ash from sugar mills in a great quantity has become one of the environmental problem, but its use in cement mortar that provided a satisfactory solution to problems that associated with waste ...
Analysis of Toxic Heavy Metals in Branded Pakistani Herbal Products

MUHAMMAD SAEED; NAVEED MUHAMMAD; HAROON KHAN; SAEED AHMAD KHAN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

The present study was designed to estimate the concentration of heavy toxic metals in Pakistani herbal products frequently used for the treatment of various ailments. For this purpose, twenty five herbal products of well ...
Compettition of Aluminium on Iron Binding Site in the Biological System

FOUZIA SULTANA REHMANI; ABDULAHAD SHAFIQUE; ASADULLAH SHAFIQUE; SHERAZ AHMAD KHAN; SABAHAT AMBREEN; MUHAMMAD INAM-UL-HAQ; MUHAMMAD RASHID; SYED SAMMAR ABBAS (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-08-20)

Aluminum toxicity has been recognized in many ways, when exposure to heavy metals is prolonged, renal function is limited or a previously accumulated bone burden is released in stress and illness. Aluminum is generally ...

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