Volume 29, Number 4
Volume 29, Number 4
Studies on the Analysis of Lead and Silica in Lead Processing Samples
Introduction Silica, along with lime and iron oxide, is an important fluxing component in the metallurgy of lead by the conventional blast furnace route 1. The hardness and structure of lead sinter is influenced...
Read MoreCharacterisation of Kapiri Mposhi Aluminosilicate Minerals
INTRODUCTION Zambia’s amazingly wide spectrum of natural resources spans a range of minerals from gemstones to industrial minerals. The industrial mineral potential of Zambia remains largely unexploited except for copper. As concerns industrial minerals,...
Read MoreHighlights of the Meeting on “Horizontal Gene Transfer and the Last Universal Common Ancestor” Held at the Open University, Milton Keynes, UK
INTRODUCTION One of the first of its kind, this meeting, held on the 5th and the 6th September, was designed to investigate and evaluate the importance of ‘horizontal gene transfer’ (HGT) during the period of the...
Read MorePentafluoropropionic acid as a Efficient Catalyst for the One-Pot Synthesis of 14-aryl-14H-dibenzo[a, j]xanthenes Under Solvent Free Conditions
INTRODUCTION Xanthenes and their derivatives are of considerable interest as they possess a wide range of biological properties, such as anti-inflammatory1, antibacterial2, antiviral3 activities, as well as their use in photodynamic4. Such compounds are...
Read MorePhosphotungstic Acid Supported on Magnetic Nanoparticle Used As Selective and Reusable Photocatalyst for Aerobic Oxidation of Benzylic Alcohols
INTRODUCTION The oxidation of alcohols into their corresponding carbonyl compounds represents a fundamentally important functional group transformation and occupies a prominent position in modern synthetic organic chemistry 1. Many thermal catalytic systems have been...
Read MoreDevelopment and Validation of a Stability Indicating Liquid Chromatographic Method for Simultaneous Estimation of Dutasteride and Tamsulosin in Combined Dosage Form
INTRODUCTION Dutasteride (DTS) is chemically (5α,17β)-N-{2,5-bis(trifluoromethyl)phenyl}-3-oxo-4-azaandrost-1-ene-17-carboxamide with an empirical formula C27H30F6N2O2 and molecular weight of 528.5 g/mol. It is a selective inhibitor of both type 1 and type 2 isoforms of 5α-reductase enzyme that...
Read MoreDeterioration in Drinking Water Resources and Relative Health Hazards in Bikaner city, Rajasthan, India: A physicochemical analysis
Introduction: The drinking water quality is very significant and vital concern at present as it is related with the present and future health perspective of the human race. Urban population of Bikaner city is ...
Read MoreA facile and Convenient Method for Synthesis of Thiiranes under Mild Condition Using Phase Transfer Catalyst
INTRODUCTION Epoxides are among the most useful synthetic intermediates towards the synthesis of many biologically active compounds1 and a large variety of reagents are known for the ring opening of these compounds.2 Their electrophilic...
Read MoreSynthesis and Characterization of Divalent Transition Metal Complexes Containing Thiosemicarbazone Ligands
INTRODUCTION Thiosemicarbazones posses considerable biological properties and have medicinal applications such as anti T.B. and leprosy1-2, antiviral properties3, antitumour4, anticancer5,6. Literature survey reveals that the presence of a metal ion increases the activity of...
Read MoreSynthesis and Antimicrobial Activity of 2-R 5-oxo 5-H 6 -carbohydrazin 7-phenyl 1,3,4-thiadiazolo-[3,2-a] pyrimidine
INTRODUCTION 1,3,4-thiadiazolo [3,2-a] pyrimidine system efficiently enhances the physiological activity of the molecule 1-3. This replacement occurs in the reactions of 1,3,4– thiadiazolo [3,2-a]pyrimidine derivatives with electrophiles4-5.Literature data on fused heterocycles with athiadiazolo [3,2-a]...
Read MoreSynthesis of Indole Annulated Benzazepine Derivative of Medicinal Interest
Introduction Benzazepine moiety occurs frequently in both natural and synthetic drugs and is of highly biological interest. The use of this class of compound is not merely confined to the management of stress related...
Read MoreUltrasound-assisted the three-component synthesis of spiro[4H-pyrano[3,2-c]quinolin-4,3′-indoline]-2′,5(6H)-diones in water
INTRODUCTION Water, after its unique role as solvent in nature, is gaining more and more importance in the recent researches of environmentally benign chemical reactions. It is a cheap and inherently safe solvent relative...
Read MoreSynthesis and Characterization of Linear Poly (divinylbenzene-co- ethylvinylbenzene) via a Cationic Solid Catalyst
INTRODUCTION The commonly used commercial divinylbenzene (technical grade) contains meta– and para– isomers of divinylbenzene (DVB) and ethylvinylbenzene (EVB). It is usually composed of 50 to 80 wt % DVB, and, depending on polymerization...
Read MoreMicrowave-Assisted One-Step Synthesis of 2,5-Disubstituted-1,3,4-Oxadiazoles Using 1,4- Bis(triphenylphosphonium)-2-Butene Peroxodisulfate
INTRODUCTION Since 1960 when Toda et al.,1 first reported the application of solid supports in organic chemistry, the use of this technique has been under investigation.2 Organic oxides such as silica gel, alumina, etc....
Read MoreDevelopment of QSAR Model of substituted Benzene Sulphonamide using Multiple Regression Analysis
Introduction: Carbonic Anhydrase-(II) are important enzymes found in red blood cells, gastric mucosa, pancreatic cells and renal tubes. The catalytic action of CA(II) is fundamental for respiration and transportation of CO2 between metabolizing tissues...
Read MoreSynthesis of poly[(pyrrole-2,5-diyl)-co-(4-hydroxylbenzylidene)] catalysed by Maghnite– H+
INTRODUCTION Among conducting electroactive polymers, polypyrrole and its derivatives have received a great deal of attention due to its high electrical conductivity, good environmental stability, relative ease of synthesis and good redox reversibility. These...
Read MoreThe One Pot Synthesis Salicylaldehyde Prepared by Reactive Grinding with Derivative Phenol and Paraformaldehyde in Absence Magnesium Methoxide
Introduction: The formylation of the hydroxy group is one of the most widely used transformation in organic synthesis. Several synthetic methods for the formylation of primary and secondary Phenol to salicylaldehyde are known. Formylation...
Read MoreA Validated Spectral Discriminating Derivative Spectrophotometric Method for Simultaneous Quantification of Atorvastatin calcium and Fenofibrate Combination in Tablets
INTRODUCTION Atorvastatin Calcium (ATV) chemically [R-(R*,R*)]-2-(4–Fluorophenyl)-β,δ-dihydroxy–5-(1–methylethyl)-3–phenyl–4-[(phenylamino)carbonyl]-1H-pyrrole–1–heptanoic acid, is a HMG-Co A reductase inhibitor with hypolipidemic properties 1-4. Fenofibrate (FEN) chemically, Isopropyl 2-[4-(4-chlorobenzoyl)2-phenoxy] methyl propanoate, is a fibric acid derivative with lipid regulating properties exerting...
Read MoreOne-pot Synthesis of Quinazolinone and Benzamide Derivatives Using SBA-Pr-SO3H as a Nanoporous Heterogeneous Acid Catalyst
INTRODUCTION Quinazolines are an important class of heterocycles with a wide range of pharmacological and biological activities such as anticancer, antiviral, anti-tubercular agents, treatment of diabetes and obesity, anti-inflammatory, insecticidal, anti-microbial1, anticonvulsant, antiulcer, hypolipidemic...
Read MoreSynthesis of Green Metallic Nanoparticles (NPs) and Applications
INTRODUCTION The word “nano” is used to indicate one billionth of a meter or 10 -9. Nanoparticles are clusters of atoms and their size from 1–100 nm. “Nano” is a Greek word meaning extremely...
Read MoreDetermination of Pesticide Residues Level in Phaseoulus Vulgaris Sp.Plant Soil at Cameron Highland
Introduction Pesticides are growth regulators that stimulate or retard the growth of plants. They function as desiccants that speed up the drying of plants, used as an aid in mechanical harvesting of cotton, soybeans...
Read MoreSynthesis, Characterisation and Structural Studies of Complexes Containing Different Schiff Bases with Mn (Lll) And Mn (Ii) Transition Metals
INTRODUCTION Schiff bases have been used as chelating ligands in the field of co-ordination chemistry and their metal complexes are of great interest for many years It is well known that N and S...
Read MoreSynthesis, Characterization and Spectral Study of Zinc Complex with Gliclazide( N-(hexahydrocyclopenta[c]pyrrol-2(1H)-ylcarbamoyl)-4- methylbenzenesulfonamide) and its Hypoglycemic Activity
Introduction Metal ion is required for many critical functions in humans. Scarcity of some metal ions can leads to disease1. Well – known example can leads to pernicious anaemia resulting from iron deficiency; growth ...
Read MoreA Theoretical Survey of Solvation Effects on Tautomerism Stability of Maleic Hydrazide
Introduction Maleic hydrazide can be easily synthesized by condensation of maleic acid (or anhydride) with hydrazine. Maleic hydrazide (MH) is industrially produced in large quantities and widely used as a plant growth regulator 1–10....
Read MoreCombined Influence of Organic Additives on Growth Morphology of Calcium Carbonate
INTRODUCTION The aesthetic control over structures and properties of biominerals produced in nature inspired chemists, biologists and materials scientists since a long time1-3. Mimicking the design and synthesis of biominerals by living organisms is...
Read MoreBioaccumulation of selected metals in fresh water Haruan fish (Channastriatus) collected from Pahang river basin, Malaysia
INTRODUCTION Heavy metals are natural components of the earth’s crust that cannot be degraded or destroyed. They are metallic elements that have a relatively high density, toxic and poisonous. According to many researchers (Blaber,...
Read MoreStudies of trace metals in the leaves of Phyllanthus emblica(L)
INTRODUCTION Phyllanthus emblica Linn. (Euphorbiaceae) known as Indian gooseberry is a very richest source of vitamin C1 found in abundant amount in deciduous forest of Madhya Pradesh. It is common all over tropical and sub-tropical India....
Read MoreCorrosion behaviour of the 42CrMo4 Steel Nitrided by Plasma
Introduction Plasma nitriding is a thermochemical process extensively applied in materials science and surface engineering due to its well-known potential for improving properties such as hardness, wear, and corrosion resistance of metallic parts [1]....
Read MoreKinetics of Isothermal Annealing of Gamma-irradiation Damage in Thallous Nitrate
INTRODUCTION The effects produced in solids by bombardment depend on nature of the target and energy of the incident radiation. The important effects are excitation, ionisation, atomic displacement from lattice sites and transmutation of...
Read MoreImpact of Reaction Dynamics on Synthesis of Novel Nitrogen containing Aldehydes
Introduction Nitrogen containing compounds are used as structural components of pharmaceuticals and agrochemicals due to their high biological activities [1]. There are many nitrogen containing chemicals, ranging from simple structural compounds as pyridine to...
Read MoreCobalt salophen complex supported on magnetic nanoparticles as an efficient reusable catalyst for oxidation of benzylic alcohols
INTRODUCTION Transition metal Schiff base complexes have attracted much interest in the field of catalysis because of their reversible bonding oxygen ability and high activities in the oxidation reactions 1-7. However, these catalysts are...
Read MoreAppraisal of mineral and heavy metal contents in Peach and Grape grown at Some Major Agricultural Companies in Saudi Arabia
Introduction Currently, extensive use of inorganic fertilizers and integrated insect-pest management approach are being adopted for increased fruit production to meet the higher demands for human consumption andto earn more income from the progressive...
Read MoreDiazo-Coupling: A Facile Mean for the Spectrophotometric Determination of Rasagiline hemitartrate
INTRODUCTION R(+)-N-propargyl-1-aminoindan (“R-PAI”) is also known as rasagiline and is a chiral compound with one asymmetric carbon atom in a five membered ring with an absolute (R) configuration which is produced as single enantiomer1....
Read MoreA study of the fatty acid profile in the muscle of Monopterus chuchia
Introduction It is a well known fact that besides being a beneficial protein source, fishes are a source of polyunsaturated fatty acids (PUFA). Fatty acids are essential nutrients in humans1-5 and other animal diet....
Read MoreStudy of Effect of Variation of Ionic Strength of the Medium on Velocity Constant of Ru(Iii) Catalyzed Oxidation of Hydroxy Benzoic Acids by Chloramine-T in Acidic Medium
INTRODUCTION IONIC STRENGTH The rate of reaction between charged species are affected strongly by the ionic strength of the solution, which is defined as: – I = ½ S ci Zi2 where ci...
Read MoreSynthesis and NMR study of N-heterocyclic carbenes (NHC) precursors derived from Tröger’s Base
Introduction Since their discovery in 1931, increasing attention is still paid to the olefination metathesis reactions 1. These reactions correspond to the redistribution of hydrocarbon backbone of the molecules in which carbon-carbon double bonds...
Read MoreSynthesis Of Flavone Skeleton By Different Methods
Introduction Flavones (flavus = yellow), are a class of flavonoids based on the backbone of 2-phenylchromen-4-one Apart from flavones other flavonoids are isoflavonoids, derived from 3-phenylchromen-4-one structure neoflavonoids, derived from 4-phenylcoumarine structure.The three flavonoid...
Read MorePotentiostatic Electrochemical Preparation and Characterisation of Aluminium Containing Nickel Selenide
Introduction Intermetallic aluminides of transition metals such as nickel exhibit advantageous properties like high tensile strength, low density and corrosion resistance at high temperature1-2. Therefore these materials can be investigated for their possible use...
Read MoreVirtual Screening Against Mycobacterium tuberculosisLipoate Protein Ligase B (MtbLipB)and In SilicoADMETEvaluation of Top Hits
INTRODUCTION Tuberculosis (TB) is an infectious disease caused by Mycobacterium tuberculosis that affects the lungs. At present, TB remains to be one of the most prevalent infections, resulting in almost 1.4 million deaths and...
Read MoreThe study of subsidence on chemical properties of oil resource by using Interferometry synthetic aperture radar technique
Introduction According to the United States institute of geology, phenomenon of land subsidence is collapse or subsidence of land to down of the earth’s surface which can be scarcely horizontal displacement vector .The movement...
Read MoreNet Rearrangements of 4-acetyl-3-(4-substituted phenylamino)-2-(5-nitropyridin-2-yl)isoxazol-5(2H)-ones to Imidazo [1, 2-a]pyridines by Flash-Vacuum-Pyrolysis (F.V.P)
Introduction The thermal or photochemical loss of nitrogen and carbon dioxide from triazoles and isoxazole-5-ones, respectively, have been reported.1 We have reported that the reaction of 4-acetyl-3-(4-substituted phenylamino)-2-(5-nitropyridin-2-yl) isoxazol-5(2H)-ones (1,X: Br, Me) 2 with...
Read MoreSynthesis and Characterization of Zinc β-Diketonate Complex Extended to the Macromolecular Polymers
Introduction Macromolecular coordination polymers including b-diketonate fragments have attracted widespread attention because of their potential applications as a high quality advanced materials [1]. The design and synthesis of such macromolecular coordination polymer chains can...
Read MoreSynthesis of Polyamide-6/Montmorillonite Nanocomposites by Direct In-situ Polymerization Catalysed by Exchanged Clay
Introduction During the last decade, polymer/clay nanocomposites have received increasing attention from scientists and industrial researchers because they generally exhibit greatly improved mechanical, thermal, barrier, and flame-retardant properties at low clay content in comparison...
Read MorePhysico-chemical Investigation of Semiconductor Industrial Wastewater
Introduction Precipitation, surface water runoff, surface water and groundwater storage and evaporation are involved in the hydrologic cycle, which caused the occurrence of changes to the quality of the water body. For instance, precipitation...
Read MoreSoft Synthesis and Nano -Structural Features of Highly Crystalline Asprin An AFM-Investigations
Introduction: Aspirin has a direct irritant effect on gastric mucosa due to inhibition of prostaglandins and prostacyclin and thus causes ulceration, epigastric distress and haemorrhage. So as to reduce the side-effects the controlled release...
Read MoreGrowth and Characterization of Urea L-valine a Organic Non Linear Optical Crystal
Introduction The search for new organic nonlinear optical crystals has been of great interest because of their wide range of potential applications such as frequency doubling, optical switching, optical disk data storage, optical modulation,...
Read MoreChemical Hazards of Nanoparticles to Human and Environment (A Review)
INTRODUCTION A nanometre (nm) is defined as the millionth part of a millimetre or 10-9 m. In comparison, the diameter of a hair is approximately 50,000 nm; and that of a hydrogen atom approximately...
Read MorePreparation and Analytical Properties of 4-Hydroxybenzaldehyde, Biuret and Formaldehyde Terpolymer Resin
Introduction Removal and separation of metal ions in aqueous solution play an important role for the analysis of wastewaters, industrial and geological samples as well as for environmental remediation[1]. Chelating resins have been widely...
Read MoreValidation of Late Season Cornstalk Nitrate Test under Different Natural and Social Environments for Better Fertilizer Management in China
Introduction China uses 7% of global water and 10% of the total arable land in the world to feed 20% of the world’s population. Under such a condition, the use of nitrogen fertilizers to...
Read MoreDevelopment and Validation of a Stability Indicating Liquid Chromatographic Method for Simultaneous Estimation of Arterolane Maleate and Piperaquine Phosphate in Combined Dosage Form
INTRODUCTION Malaria is a major public health problem infecting 300-500 million people worldwide and causing more than one million deaths annually globally. An endemic protozoal disease in India with an estimated 70-100 million cases...
Read MoreElectrochemical study of Conducting Polymer/Lignin Composites
INTRODUCTION Conducting polymers are polymeric materials that have both metallic and semiconductor characteristics. A key property of a conductive polymer is the presence of conjugated double bonds along the backbone of the polymer. Conducting...
Read MoreSynthesis, Physico-Chemical and Antidiabetic Studies of Zinc Complex of Glimepiride, an Oral Hypoglycemic Agent
INTRODUCTION Glimepiride 1-(p-(2-(3-ethyle-4-methyl-2-oxo-3-pyroline-1-carboxamido)ethyl)phenyl sulfonyl)-3-(trans-4-methylcyclohexyl) Urea is a third generation hypoglycemic sulfonylurea, which is useful in the treatment of non-insulin dependent diabetesmellitus (NIDDM)1-2. Glimepiride is a white crystalline powder, relatively insoluble in water. It exhibits...
Read MoreStudies on the Pyrazine Complexes of Some Diaryltellurium Dihalides
INTRODUCTION Aryltclluriumdihalides are known to behave as Lewis acids and form molecular complexes with several nitrogen, oxygen and sulphur donor bases. It has been reported1 that Lewis acidity of tellurium atom falls significantly on...
Read MoreSimulation of fluid flow and solididification in the funnel type crystalizer of thin slab continuous cast
Introduction The process of continuous casting for producing thin slab steels can be performed in an open-end mold and then cooling followed by preheat treatment and the rolling of the products. The thin slab...
Read MoreScreening of Mineral Elements in Cistus ladanifer and Cistus libanotis Essential Oils and their Leaves
Introduction: Cistus ladanifer and Cistus libanotis are two species of genus Cistus (Cistaceae) widely present in the Mediterranean area. Cistus ladanifer is used for treatment of various skin diseases, as anti-diarrhoeal and as anti-inflammatory...
Read MoreMacrobenthic diversity in Horseshoe Crab nesting ground – Balok station, Pahang, Malaysia
Introduction Macrobenthos in marine sediment play an important role in ecosystem processes such as nutrient cycling, pollutant metabolism, dispersion and burial, and in secondary production (Snelgrove, 1998). Structure of benthic community is now frequently...
Read MoreMicrocalorimetric Study of the Catalytic Properties of SBA-15 Modified with Cu or Fe for Adsorption/Oxidation of methyl mercaptane
INTRODUCTION Sulfur compounds are well known as a problem affecting not only the environment but also human health. Thus, in recent decades research centers dedicated to proposals to protect the environment and public health...
Read MorePrenylated xanthone and rubraxanthone with Antiplatelet aggregation activity in human whole blood isolated from Garcinia griffithii.
INTRODUCTION Plant secondary metabolites are a group of naturally occurring compounds classes biosynthesized by differing biochemical pathways whose plant content and regulation is strongly susceptible to environmental influences and to potential herbal predators. From...
Read MoreDesign and synthesis of a new androgen derivative using some strategies
Introduction There are several reports on development of some androgen derivatives; for example, the synthesis of 17α-(tributylstannylethynyl)-4-androsten-17-ol-3-one by the reaction of 17-ethynyl-4-androsten-17-ol-3-one with Bu3SnOMe to reflux1. Other data indicate the preparation of 3-oxoandrost-4-en-17β-yl-2-methyl-1H-imidazole-1-carboxylate by...
Read MoreExtraction of rare earth and heavy metals, using ionic solvents as extraction medium (A Review)
Introduction Ionic liquids show unique properties such as nonvolatility (negligible vapor pressure), thermal stability, nonflammable nature, lower reactivity, strong ability to dissolve a large variety of organic and inorganic compounds… That’s why we should...
Read MoreCrystallographic Evidence for the Host-Guest Interaction of Metallamacromolecules
Introduction Macrocyclic host molecules such as calixarenes, cucurbiturils, and cyclodextrins act as catalytical nanoreactors,1 drug delivery agents,2 or molecular detectors.3 The successful application of these molecules often requires functionalization or derivatization with active functional...
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