DSpace Home
→
Recent submissions

Pastic Digital Repository: Recent submissions

Now showing items 61-80 of 18183

Effect of Various Levels of Salinity on the Uptake of Macronutrients (N, P, K, Ca, and Mg) by the Roots and Shoots of Sunflower (Helianthus annuus L.) Hybrids

ABDUL KABIR KHAN ACHAKZAI; SAFDAR ALI KAYANI; AZHAR HANIF (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-10)

A pot culture experiment was conducted to study the effects of four different levels of salinity having osmotic potential of 0.00, -4.67, -9.35, and -14.03 bars on the uptake of macronutrients (N, P, K+, Ca²+, and Mg²+) ...
COMPARATIVE STUDY ON THE NO₂ BINDINGS TO (MGO)N AND (CAO)N CLUSTERS, N = 4, 6, AND 9: FORMATION OF NITRITE AND NITRATE

FATHI HASSAN BAWA (The chemical society of Pakistan is an approved society from the PSF., 2010-06-09)

A comparative study on MgO and CaO clusters toward NO2 adsorption have been investigated theoretically by the density functional theory, approach Beck3LYP. Bond lengths, bond angles as well as adsorption energies of the ...
Flow Injection Spectrophotometric Method for the Quantitative Determination of Humic Acid (HA) in Treated and Natural Waters

TAHSEEN GHOUS; AAMIR RASHEED; MUHAMMAD SIRAJ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-08)

A double channel flow injection (FI) spectrophotometric method was established for humic acid (HA) determination in milligram levels in treated and natural waters. FI method was developed for the determination of humic ...
Physicochemical Characterization of Groundwater in Urban Areas of Lahore, Pakistan, with Special Reference to Arsenic

GULRAIZ AKHTER; ZULFIQAR AHMAD; JAVED IQBAL; NAZIA SHAHEEN; MUNIR HUSSAIN SHAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-07)

The current quality status of groundwater from Lahore was investigated using standard analytical methodologies. The physicochemical parameters included in the study were pH, alkalinity, electrical conductivity, TDS, hardness, ...
Gas Chromatographic Analysis of Tranexamic Acid in Pharmaceutical Preparation Using Ethyl Chloroformate as Derivatizing Reagent

KULSOOM UBEDULLAH ABBASI; MUHAMMAD YAR KHUHAWAR; MUHAMMAD IQBAL BHANGER (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-06)

Ethyl chloroformate (ECF) has been used as derivatizing agent for gas chromatographic (GC) determination of tranexamic acid (TA). The elution was from the column HP-5 (30 m x 0.32 mm i.d.) connected with flame ionization ...
Synthesis of Substituted 1, 4-dihydro-4-ferrocenylpyridines and 3-ferrocenyl-2-pyrazolines Catalyzed by Ionic Liquid [Bmim] OH

JIAN ZHANG; CHENGXIANG SHANG; LONGFEI JIN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-04)

5-aryl-3-ferrocenyl-1-phenyl-2-pyrazolines have been synthesized by the reaction of α, β-unsaturated ketones with phenylhydrazine in ionic liquid [Bmim]OH. While 4-ferrocenyl-1,4-dihydropyridine-2,6-dimethyl-3,5-dicarboxylic ...
Quantification of V(IV)-Maltol Complex Using Cyclic Voltammetry

HUMERA ANWER; ZAHIDA TASNEEM MAQSOOD; SYED AZHAR ALI (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-05)

Cyclic voltammetry is used in the present research work for the quantitative study of BMOV, (bis(maltolato)oxovanadium(IV)), the compound which shows insulin like properties. Electrochemical study of BMOV was done using ...
Cathodic Voltammetry of Nitrobenzene at Titanium in Micellar Solution

IMAM-UL-HAQUE; MUQADDAS TARIQ (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-04)

The present study relates to electro-reduction of nitrobenzene in the presence of miceller aqueous solution of sodium dodecyl sulphate at titanium cathode, using cyclic voltammetric and titanium etching methods in a ...
Synthesis of Dye-sensitized Solar Cell Using Nickel- tetraphenylporphrine as a Sensetizer

FAWAD AHMED; MUHAMMAD ATHAR ABBASI; AZIZ-UR-REHMAN; MUHAMMAD ASLAM AWAN; MUHAMMAD ASIF IQBAL; SYEDA AMBAR YOUSAF; MUHAMMAD JAVED IQBAL; VIQAR UDDIN AHMAD (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-03)

A dye-sensitized solar cell was prepared under facile conditions. For this, a wide range of metalloporphrines was investigated and consequently Ni-tetraphenylporphrine was selected because it gave the maximum output in ...
Study of Hydrodynamic and Non-Hydrodynamic Interaction Parameters for Water / PVP / PVA Ternary System by Solution Viscometry

SHER AKBAR; GHULAM SARWAR (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-02)

Polymer-Polymer interaction parameters from a water soluble polymer-blend solution have been determined by viscometry at 25°C. The ternary system assayed is distilled water poly (N-vinyl-2-pyrrolidone) (PVP)/Poly (vinyl ...
Effect of Orientation of Glass Fiber on Mechanical Properties of GRP Composites

SHAHZAD ALAM; FARZANA HABIB; MUHAMMAD IRFAN; WAQAS IQBAL; KHURAM KHALID (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2010-06-01)

Glass Fiber Reinforced polymer matrix composites are one of the most important engineering materials required for a variety of advanced and sophisticated applications in modern industry. The two components of a GRP composites ...
The Dissipation of Pyrimorph in Lake Water/Sediment Systems

ZHUONAN LI; WENBI GUAN; YONGQIANG MA; HENG ZHAO; ZHAOHAI QIN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-10)

A study into the environmental behavior of pyrimorph in lake water/sediment systems has been carried out. The residue of pyrimorph in water and sediment for aerobic and anaerobic tests was determined, respectively. For ...
Microwave Assistant Synthesis, Crystal Structure and Biological Activity of A 1,2,4-Triazole Compound

WEI KE; NA-BO SUN; HONG-KE WU (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-09)

The title compound (C₁₇H₁₄F₂N₄SO) were synthesized and recrystallized from CH₃CN. The compound was characterized by ¹H-NMR, FTIR, MS, HRMS and X-ray diffraction. The compound crystallized in the Monoclinic space group C2/c ...
Synthesis, Crystal Structure and Biological Activity of A Novel 1,2,3-Thidiazole Compound

WEI KE; NA-BO SUN; HONG-KE WU (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-07)

A new 1,2,3-thiadiazole compound was synthesized and characterized by ¹H NMR, MS and HRMS. The crystal structure of the title compound (C₁₂H₁₁ClN₂O₄S₂, Mr = 346.80) has been determined by single-crystal X-ray diffraction. ...
Synthesis of Three New Donor- Acceptor [4] Dendralenes

MIR MUNSIF ALI TALPUR; TAJNEES PIRZADA; PETER SKABARA; THOMAS WESTGATE; MOHAMMAD RAZA SHAH (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-06)

Three new donor - acceptor [4] dendralene compounds have been synthesized. Wittig reaction was used for the preparation of first two compounds and third one by Knoevehagel condensation. Their mass was calculated by APCI ...
A Facile Multi Component Synthesis of Some Functionalized Chromenes and Spiroindole Derivatives using DABCO as an Efficient Catalyst

AKBAR MOBINIKHALEDI; MAHSA JABBARPOUR (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-06)

Chromene and spirocyclic 2-oxindole derivatives were readily synthesized in good yields via a one-pot three-component reaction involving Knoevenagel condensation of aromatic aldehyde or isatin with an active methylene ...
Gas Chromatographic Mass Spectrometric Analysis of n-Hexane Fraction of the Leaves of Sugar Beets (Beta vulgarus)

ZAHID HUSSAIN; PIR MOHAMMAD; KHAIR ZAMAN; KHALID MOHAMMED KHAN; SHAHNAZ PERVEEN; SADAF NIAZ (HEJ Research Institute of Chemistry, University of Karachi, Karachi, 2013-08-06)

The n-hexane fraction of the leaves of sugar beet was analyzed qualitatively and quantitatively using GC-MS and GC equipped with FID in separate experiments. The crude was extracted using ethanol and fractionated by n-hexane, ...
Application of Antioxidant Indicators to Select Nicotine-Degrading Bacterium for Bioaugmented Treatment of Tobacco Wastewater

HONGZHEN HE; MEIZHEN WANG; HUAJUN FENG; XIN ZHENG; DONGSHENG SHEN (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-05)

To select nicotine-degrading bacterium for bioaugmented treatment of tobacco wastewater, the activities of antioxidant indicators such as superoxide dismutase (SOD), catalase (CAT) and glutathione (GSH), and the ability ...
Determination of Estrogens in Milk by HPLC using Salting-Out Extraction

DEQING ZOU; YAN ZOU; ZHIGANG TAI; QI WANG; YALING YANG (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-04)

A simple salting-out assisted liquid–liquid extraction (SALLE) method with acetonitrile combined with high-performance liquid-chromatography was developed and applied for the determination four kinds of estrogens (estradiol ...
Synthesis of Attapulgite Clay@Fe₂O₃ Composite via Ionic Liquid and Its Application in the Oxidation of Elemental Mercury

HUI CANG YU LU; FEN NV HAN; JING LING SHAO; QI XU (HEJ Research Institute of Chemistry, University of Karachi, Karachi., 2013-08-04)

Attapulgite clay@Fe₂O₃ (ATP@Fe₂O₃) composite was prepared by a one-pot calcination process via the ionic liquid (IL), [bmim]PF₆, using two cheap, ecofriendly materials (i.e., Fe(NO₃)₃•9H₂O and ATP, which is a magnesium ...

Now showing items 61-80 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