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  Subjects -> CHEMISTRY (Total: 846 journals)
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    - CHEMISTRY (597 journals)
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CHEMISTRY (597 journals)                  1 2 3 | Last

Showing 1 - 200 of 735 Journals sorted alphabetically
2D Materials     Hybrid Journal   (Followers: 5)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 26)
ACS Catalysis     Full-text available via subscription   (Followers: 23)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 15)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 24)
ACS Macro Letters     Full-text available via subscription   (Followers: 18)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 31)
ACS Nano     Full-text available via subscription   (Followers: 155)
ACS Photonics     Full-text available via subscription   (Followers: 6)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 16)
Acta Chemica Iasi     Open Access  
Acta Chimica Sinica     Full-text available via subscription   (Followers: 1)
Acta Chimica Slovaca     Open Access   (Followers: 2)
Acta Chromatographica     Full-text available via subscription   (Followers: 8)
Acta Facultatis Medicae Naissensis     Open Access  
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 4)
Acta Scientifica Naturalis     Open Access  
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 5)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 4)
Advanced Functional Materials     Hybrid Journal   (Followers: 41)
Advanced Science Focus     Free   (Followers: 2)
Advances in Chemical Engineering and Science     Open Access   (Followers: 33)
Advances in Chemical Science     Open Access   (Followers: 10)
Advances in Chemistry     Open Access   (Followers: 7)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 14)
Advances in Drug Research     Full-text available via subscription   (Followers: 21)
Advances in Environmental Chemistry     Open Access   (Followers: 1)
Advances in Enzyme Research     Open Access   (Followers: 4)
Advances in Fluorine Science     Full-text available via subscription   (Followers: 8)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 12)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 15)
Advances in Nanoparticles     Open Access   (Followers: 12)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 13)
Advances in Polymer Science     Hybrid Journal   (Followers: 36)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 13)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 13)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 5)
Advances in Science and Technology     Full-text available via subscription   (Followers: 2)
African Journal of Bacteriology Research     Open Access  
African Journal of Chemical Education     Open Access   (Followers: 2)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 6)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 3)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 68)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 12)
American Journal of Chemistry     Open Access   (Followers: 23)
American Journal of Plant Physiology     Open Access   (Followers: 13)
American Mineralogist     Full-text available via subscription   (Followers: 7)
Anadolu University Journal of Science and Technology     Open Access  
Analyst     Full-text available via subscription   (Followers: 41)
Angewandte Chemie     Hybrid Journal   (Followers: 115)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 163)
Annales UMCS, Chemia     Open Access   (Followers: 1)
Annals of Clinical Chemistry and Laboratory Medicine     Open Access   (Followers: 1)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 2)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 3)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 7)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 8)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 13)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antiviral Chemistry and Chemotherapy     Full-text available via subscription  
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 5)
Applied Spectroscopy     Full-text available via subscription   (Followers: 22)
Applied Surface Science     Hybrid Journal   (Followers: 20)
Arabian Journal of Chemistry     Open Access   (Followers: 6)
ARKIVOC     Open Access   (Followers: 2)
Asian Journal of Biochemistry     Open Access   (Followers: 1)
Atomization and Sprays     Full-text available via subscription   (Followers: 2)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 4)
Autophagy     Hybrid Journal   (Followers: 2)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 8)
Biochemistry     Full-text available via subscription   (Followers: 204)
Biochemistry Insights     Open Access   (Followers: 4)
Biochemistry Research International     Open Access   (Followers: 4)
BioChip Journal     Hybrid Journal  
Bioinorganic Chemistry and Applications     Open Access   (Followers: 8)
Bioinspired Materials     Open Access   (Followers: 2)
Biointerface Research in Applied Chemistry     Open Access   (Followers: 1)
Biointerphases     Open Access   (Followers: 1)
Biology, Medicine, & Natural Product Chemistry     Open Access  
Biomacromolecules     Full-text available via subscription   (Followers: 17)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 9)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 2)
BioNanoScience     Partially Free   (Followers: 4)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 94)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 85)
Bioorganic Chemistry     Hybrid Journal   (Followers: 9)
Biopolymers     Hybrid Journal   (Followers: 16)
Biosensors     Open Access   (Followers: 1)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 2)
Bitácora Digital     Open Access  
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 3)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 24)
Bulletin of the Korean Chemical Society     Hybrid Journal  
C - Journal of Carbon Research     Open Access   (Followers: 2)
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 2)
Canadian Journal of Chemistry     Full-text available via subscription   (Followers: 6)
Canadian Mineralogist     Full-text available via subscription   (Followers: 3)
Carbohydrate Research     Hybrid Journal   (Followers: 27)
Carbon     Hybrid Journal   (Followers: 64)
Catalysis for Sustainable Energy     Open Access   (Followers: 4)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 6)
Catalysis Science and Technology     Free   (Followers: 4)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysts     Open Access   (Followers: 5)
Cellulose     Hybrid Journal   (Followers: 4)
Cereal Chemistry     Full-text available via subscription   (Followers: 4)
ChemBioEng Reviews     Full-text available via subscription  
ChemCatChem     Hybrid Journal   (Followers: 5)
Chemical and Engineering News     Free   (Followers: 10)
Chemical Bulletin of Kazakh National University     Open Access  
Chemical Communications     Full-text available via subscription   (Followers: 62)
Chemical Engineering Research and Design     Hybrid Journal   (Followers: 20)
Chemical Research in Chinese Universities     Hybrid Journal   (Followers: 3)
Chemical Research in Toxicology     Full-text available via subscription   (Followers: 17)
Chemical Reviews     Full-text available via subscription   (Followers: 136)
Chemical Science     Open Access   (Followers: 18)
Chemical Technology     Open Access   (Followers: 5)
Chemical Vapor Deposition     Hybrid Journal   (Followers: 4)
Chemical Week     Full-text available via subscription   (Followers: 7)
Chemie in Unserer Zeit     Hybrid Journal   (Followers: 53)
Chemie-Ingenieur-Technik (Cit)     Hybrid Journal   (Followers: 26)
ChemInform     Hybrid Journal   (Followers: 4)
Chemistry & Biodiversity     Hybrid Journal   (Followers: 5)
Chemistry & Biology     Full-text available via subscription   (Followers: 30)
Chemistry & Industry     Hybrid Journal   (Followers: 2)
Chemistry - A European Journal     Hybrid Journal   (Followers: 109)
Chemistry - An Asian Journal     Hybrid Journal   (Followers: 12)
Chemistry and Materials Research     Open Access   (Followers: 14)
Chemistry Central Journal     Open Access   (Followers: 5)
Chemistry Education Research and Practice     Free   (Followers: 4)
Chemistry in Education     Open Access   (Followers: 2)
Chemistry International     Hybrid Journal   (Followers: 1)
Chemistry Letters     Full-text available via subscription   (Followers: 41)
Chemistry of Materials     Full-text available via subscription   (Followers: 136)
Chemistry of Natural Compounds     Hybrid Journal   (Followers: 8)
Chemistry World     Full-text available via subscription   (Followers: 21)
Chemistry-Didactics-Ecology-Metrology     Open Access  
ChemistryOpen     Open Access   (Followers: 1)
Chemkon - Chemie Konkret, Forum Fuer Unterricht Und Didaktik     Hybrid Journal  
Chemoecology     Hybrid Journal   (Followers: 2)
Chemometrics and Intelligent Laboratory Systems     Hybrid Journal   (Followers: 15)
Chemosensors     Open Access  
ChemPhysChem     Hybrid Journal   (Followers: 6)
ChemTexts     Hybrid Journal  
CHIMIA International Journal for Chemistry     Full-text available via subscription   (Followers: 3)
Chinese Journal of Chemistry     Hybrid Journal   (Followers: 6)
Chinese Journal of Polymer Science     Hybrid Journal   (Followers: 10)
Chromatographia     Hybrid Journal   (Followers: 25)
Chromatography     Open Access   (Followers: 5)
Chromatography Research International     Open Access   (Followers: 5)
Clay Minerals     Full-text available via subscription   (Followers: 9)
Cogent Chemistry     Open Access  
Colloid and Interface Science Communications     Open Access  
Colloid and Polymer Science     Hybrid Journal   (Followers: 8)
Colloids and Surfaces B: Biointerfaces     Hybrid Journal   (Followers: 6)
Combinatorial Chemistry & High Throughput Screening     Hybrid Journal   (Followers: 4)
Combustion Science and Technology     Hybrid Journal   (Followers: 17)
Comments on Inorganic Chemistry: A Journal of Critical Discussion of the Current Literature     Hybrid Journal   (Followers: 1)
Composite Interfaces     Hybrid Journal   (Followers: 3)
Comprehensive Chemical Kinetics     Full-text available via subscription   (Followers: 1)
Comptes Rendus Chimie     Full-text available via subscription  
Comptes Rendus Physique     Full-text available via subscription   (Followers: 1)
Computational and Theoretical Chemistry     Hybrid Journal   (Followers: 10)
Computational Biology and Chemistry     Hybrid Journal   (Followers: 10)
Computational Chemistry     Open Access   (Followers: 2)
Computers & Chemical Engineering     Hybrid Journal   (Followers: 9)
Coordination Chemistry Reviews     Full-text available via subscription  
Copernican Letters     Open Access  
Critical Reviews in Biochemistry and Molecular Biology     Hybrid Journal   (Followers: 4)
Crystal Structure Theory and Applications     Open Access   (Followers: 2)
CrystEngComm     Full-text available via subscription   (Followers: 6)
Current Catalysis     Hybrid Journal   (Followers: 1)
Current Metabolomics     Hybrid Journal   (Followers: 3)
Current Opinion in Colloid & Interface Science     Hybrid Journal   (Followers: 7)
Current Opinion in Molecular Therapeutics     Full-text available via subscription   (Followers: 16)
Current Research in Chemistry     Open Access   (Followers: 7)
Current Science     Open Access   (Followers: 12)
Dalton Transactions     Full-text available via subscription   (Followers: 17)
Detection     Open Access   (Followers: 2)
Developments in Geochemistry     Full-text available via subscription   (Followers: 1)
Diamond and Related Materials     Hybrid Journal   (Followers: 12)
Dislocations in Solids     Full-text available via subscription  
Doklady Chemistry     Hybrid Journal  
Drying Technology: An International Journal     Hybrid Journal   (Followers: 3)
Eclética Química     Open Access   (Followers: 1)
Ecological Chemistry and Engineering S     Open Access   (Followers: 2)
Ecotoxicology and Environmental Contamination     Open Access  
Educación Química     Open Access   (Followers: 1)
Education for Chemical Engineers     Hybrid Journal   (Followers: 4)
Elements     Full-text available via subscription  
Environmental Chemistry     Hybrid Journal   (Followers: 5)
Environmental Chemistry Letters     Hybrid Journal   (Followers: 2)

        1 2 3 | Last

Journal Cover Chemistry and Materials Research
  [14 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2224-3224 - ISSN (Online) 2225-0956
   Published by IISTE Homepage  [30 journals]
  • Assessment of Woody Vegetation Structure in Relation to Different Grazing
           Areas and Chemical Composition of Major Browse Species in Chifra District,
           Afar Regional state

    • Authors: Mohammed Abdulatife, Hanfere Mohammed, Abule Ebro
      Abstract: The objectives of the study were to assess the woody species composition and chemical composition of major browse species under three grazing areas. The study was undertaken in Chifra district of zone one (Awsi Rasu) of the Afar Regional State. The total tree species recorded in the study district was 14. According to the perceptions of the pastoralists, of the identified woody species, 42.9, 28.6, 21.4 and 7.1% were highly palatable, palatable, less palatable and unpalatable, respectively. Some of the dominant (>20% of the density) and/or common (10% to 20% of the density) woody species in the communal grazing areas of the lower altitude (>550-850m) were Acalypha fruticosa and Solanum incanum. A long riversides species like Casuarina equisetifolia and Salvadora persiaca were dominant and/or common. Whereas, Acacia tortilis, C. equisetifolia, C. africana and G. tembensis were common and/or dominant in the enclosure areas.  A. fruticosa and G. tembensis were common and/or dominant in the communal grazing area of the upper altitude (>850-1100 m) The communal grazing areas had a higher percentage of woody vegetation in two consecutive height classes i.e. >0-0.5 m and >0.5-1m in the lower altitude (>550-850 m) but in the upper altitude (>850-1100 m) a higher percentage of woody vegetation were found in three consecutive height classes, i.e.,>1.5-2m, >2-3m and >3-4m than in the other two grazing areas. The CP content was higher in the composite sample taken from enclosure areas and lowest in riversides grazing areas in both seasons. Grewia tembensis was the best tree species with better nutritive value due to higher content of CP, whereas Balanite aegyptica was a low quality species relative to the other tree species. Keywords: Communal, riversides, enclosure, tree species, common and dominant  
      Issue No: Vol. 8
       
  • Impact of Air Pollution on Proline and Soluble Sugar Content of Selected
           Plant Species

    • Authors: AGBAIRE; Patience Odafevejiri
      Abstract: This study examined the effect of ambient air population of two biochemical factors of plants; Proline and soluble sugar. Two sets of similar ecological statues of but different exposure to vehicular activities were used. The initiative, known as Experiment Site (ES) and the other, Control Site (CS). Twenty plant species were chosen from these sites. Proline and soluble sugar were determined according to standard methods. The result of this study showed an increase proline content on the experimental site suggestive of its protective mechanism under stress condition. There was a significant difference between the concentration of proline at the experimental and control sites. The percentage change (increase) from control site to experimental sites ranged between 24.90 % in Citrus sinesis to 57.22 % in Carica papaya. Soluble sugar on the other had reduced at experimental site when compared with those of a control site. There was however no significant difference in the concentration of soluble sugar from experimental and control sites. The percentage change (reduction) ranged between 24.49 % in Tipu tipuana and 47.87 % in Psidium guajava and Anacadium occidentale. This reduction in the concentration of soluble sugar in experimental site, suggest photosynthetic inhibition. Keywords: Soluble Sugar, Proline, Air Pollution, Biochemical, Nigeria
      Issue No: Vol. 8
       
  • The Effect of Temperature, Moisture Content and Contact Time on the Time
           Extract from Bitter Kola (garcinia kola)

    • Authors: OKONKWO SYLVIA, EMILY JAJA, OKAFOR E.C
      Abstract: The effects of temperature, moisture content and contact time on the extract from garcinia kola were studied. From the results obtained, the yield increases as the temperature were being raised. At the temperature of 75°C,85°C,95°C  and 105°C, the yield were 2.2g, 2.7g, 2.9g, and 3g respectively. Moisture decreases with an increase in the oil yield. Sun dry the maximum yield of 2.5g with the lowest moisture content of 9%. The yield increased with an increase in contact time but leveled out as the maximum contact time required for the extraction was exceed. Analysis on the oil such as free fatty acid, refractive index, viscosity, yield capacity, density, specific gravity, pH boiling point, flash point,iodine value and saponification value were carried
      Issue No: Vol. 8
       
  • Synthesis of Nanofiber from Oil Palm Empty Fruit Bunches Cellulose Acetate
           for Bioplastics Production

    • Authors: Khaswar Syamsu, Akhiruddin Maddu, Nur Alim Bahmid
      Abstract: The purposes of this research were to obtain nanometer-sized fiber with electrospinning method and to produce bioplastics with addition of diethylen glicol (DEG) plasticizer. This research was conducted through several stages, namely extraction of cellulose, synthesis of cellulose acetate, sythesis of nanofibers and production of bioplastics. In the production of nanofibers cellulose acetate, electrospinning method were used with concentrations of cellulose acetate  (5, 10, and 15 %) and spinneret-collector distances (6, 8, and 10 cm) treatments.  In the production of bioplastics, solution casting method was  ​​used with micro and nano fiber-sized cellulose acetate  and addition of DEG plasticizer (0, 10, 20, and 30 %) treatments. The results of this research showed that  the lowest nanofiber diameter of 134 nm was obtained on the cellulose acetate concentration of 10% and spinneret-collector distance of 8 cm. The best mechanical characteristic was obtained on bioplastic of nanofiber celulose acetate and the addition of plasticizer at the concentration of 10%. Its mechanical characteristics were tensile strength of 3.953 MPa and elongation of 18.56%. Keywords: nano fiber, cellulose acetate, oil palm empty fruit bunches cellulose, electrospinning, bioplastics.
      Issue No: Vol. 8
       
  • Determination of Cefuroxime Axetil and Cefixime Trihydrate in
           Pharmaceutical Dosage Forms by RP-HPLC Method

    • Authors: Bashir Elias Mohammad Anas Alfeen
      Abstract: A High Performance liquid chromatographic method was developed for the determination of Cephalosporins like as: Cefuroxime axetil, Cefixime trihydrate, in pharmaceutical dosage forms. Isocratic separation was performed on an Enable C18 column (250 mm x 4.6 mm, 5.0μm) using Triethylamine: Methanol: Acetonitrile: Ultra Pure Water (2: 10: 20: 68 v/v%) as the mobile phase at a flow rate of 1.0 ml/min. The PDA detection wavelength was set at 265nm. The linearity was observed over a concentration range of 0.1–80 μg/ml for HPLC method (correlation coefficient=0.999). The developed methods were validated according to ICH guidelines. The relative standard deviation values for the method precision studies were < 2%, and the accuracy was > 99%. The developed method was used successfully for the determination of Cefuroxime axetil, Cefixime trihydrate, in Capsule, Tablet and  dry syrup formulations. Keywords: Cefuroxime axetil (CA), Cefixime trihydrate (CT), HPLC.  
      Issue No: Vol. 8
       
  • Impact Assessment of Cement Factory Waste Water on the Heavy Metal
           Contents of a Typical Low-Latitude Stream in North Central Nigeria

    • Authors: Francis K. Meme, Francis O. Nwadukwe
      Abstract: Sediment and water samples from Oinyi River were collected bi-monthly from three sampling stations and analyzed for heavy metals in order to ascertain their distribution in sediment and water of the river, and also to determine the effects of the cement factory waste water on heavy metal concentration of the studied river. Station 1, located upstream of point of discharge of cement factory waste water, served as control point. Station 2 was immediately downstream of the factory’s waste water discharge point, and was designated as impact site while station 3 which was selected as the recovery site was downstream of both station 1 and 2. The cement factory waste water impacted negatively on the water chemistry and sediment of the river. Values obtained from river water sample showed that Zinc (0.05-0.054mg/l) and Copper (0.004-0.008mg/l) had their highest values at station 2 while the values of Manganese (114.8–115.8mg/kg), Zinc (6.07–6.26 mg/kg), Copper (3.3–3.39 mg/kg), Nickel (5.2–6 mg/kg), Lead (0.4–0.55 mg/kg), Chromium (0.3–0.45 mg/kg) and Cadmium (0.15–0.24 mg/kg), of river sediment, were also highest at the cement impacted site. However, there was reduction in the amount of Iron (92.4–93.8 mg/kg) in sediment sample of impacted site. These noticeable increases in the heavy metal contents of the waste water impacted site may be attributed to the cement factory effluent, and if not checked or stopped may become a matter of health issue because of the enormous human activities taking place in the site, as recorded in the study. Keywords: cement factory; waste water; heavy metals; sediment; water quality; Oinyi River.   
      Issue No: Vol. 8
       
  • Qualitative and Quantitative Analysis of Fatty Acid Composition of Parkia
           Biglobbossa Seed Oil Using Gas Chromatographic and High Resolution Nuclear
           Magnetic Resonance Spectroscopic Methods

    • Authors: Ayomadewa Mercy OLATUNYA, Cecilia Olufunke AKINTAYO, Emmanuel Temitope AKINTAYO
      Abstract: Gas chromatography (GC) and high resolution nuclear magnetic resonance (NMR) spectroscopic techniques were used to determine the qualitative and quantitative fatty acid composition of Parkia biglobbossa seed oil. The results obtained from GC, 13C NMR and 1H NMR methods were compared using statistical analysis of one way analysis of variance and there was no significant difference in all the percentages obtained for both saturated and unsaturated fatty acid (P> 0.05).  The result showed that 1H NMR, 13C NMR and GC techniques could be used for determination of the saturated and unsaturated fatty acid composition of P. biglobbossa. NMR may therefore be more suitable because it is reliable, less time consuming and not laborious compared to other classical methods. Keywords:  Parkia biglobbossa oil, Gas chromatography, Nuclear Magnetic Resonance, Fatty acid composition.  
      Issue No: Vol. 8
       
  • Monitoring of Industrial Waste Disposal by the use of Computer-developed
           Models: A Case Study of the Jakara Waste-water Channel in Kano Metropolis,
           Kano State, Nigeria

    • Authors: Timothy Akpomie, Eno Ekanem, Mohammed Adamu
      Abstract: The concentrations of four heavy metals (Fe, Cd, Cu and Pb), from a previous study, on the determination of pollutants in waste-water samples along the Jakara waste-water channel in Kano metropolis were modelled using the Minitab statistical software. This was with the view of obtaining a model that would estimate and forecast the extent of pollution by the continuous discharge of industrial sewage on the canal. Though the initial concentrations of these metals were higher than the acceptable limits for sewage disposal by the World health organization (WHO), the obtained models showed that the concentrations of the respective heavy metals were increasing in a quadratic manner with time. Furthermore, from an initial concentration of 21.45, 3.58, 3.78 and 2.87mg/l for each respective heavy metal in the year 2008, the obtained models forecasted the concentrations at 95% confidence level, to be 15, 56, 30 and 35 times higher than their initial concentrations respectively by the year 2013. Finally, the order for this bioaccumulation was found to be Cd > Pb > Cu > Fe. The predicted concentrations would be indicative of the degree of bioaccumulation of these metals by vegetables if irrigated from this wastewater source. Keywords: Bio-accumulation, Bio-magnification, Chemometrics, geo-accumulation, Models, waste-water
      Issue No: Vol. 8
       
  • Insulin and Glucagon Levels in Diabetic, Diabetic Neuropathy Patient`s

    • Authors: Tamara Ala`a, Zeinab M. Al-Rubaei
      Abstract: Background: Diabetic neuropathy affects 30–50% of patients with diabetes mellitus. It encompasses several neuropathic syndromes, the commonest being distal symmetrical polyneuropathy or ‘diabetic peripheral neuropathy’ (DPN). Risk factors for DPN include poor glycaemic control and drivers of macrovascular disease including hypertension.Objective: The study aimed to determination of insulin, glucagon levels in diabetic and diabetic neuropathy patient`s and compare the results with control group. Also, Insulin/Glu ratio calculated that may be used in early diagnosis of diabetic neuropathy.Subjects and Methods: ninety subjects were enrolled in this study with aged ranged (40-65) years and BMI with (30-35) Kg/m2 that divided into three groups as follows: group one (G1) consists of 30 healthy individuals as a control group, group two (G2) consists of 30 patients with diabetic and group three (G3) consists of 30 patients with diabetic and neuropathy as complication. ESC(Feet Mean), ESC(Hand Mean), ESC(Risk of neuropathies), FBS, insulin, Glucagon were determined. Also, HOMA-IR and insulin/Glu ratio were calculated.Results: The results of this study revealed highly significant differences in ESC (Feet Mean), ESC (Hand Mean) and ESC (Risk of neuropathies) between G2 and G3 comparing with G1 and in G3 comparing to G2. Results revealed a highly significant increased in FBS, insulin and HOMA-IR levels in G2 comparing to G1 and in G3 comparing to G2 and G1. Results, also, showed a high significant increased in glucagon levels in G2 and G3 comparing to G1 while no significant increased was found in G3 comparing to G2. Results, also, showed no significant reduction was found in In/Glu ratio in G2 comparing to G1, while a high significant elevation was observed in G3 comparing to G2 and G1.Conclusion: The conclusion could be drawn from this study that insulin and glucagon increased in patients with neurodiabetic when comparing to diabetic patients. Also, In/Glu ratio increased significantly in neurodiabetic patients when comparing to diabetic and control group that may be considered important marker in diagnosis of development of neuropathy risk. Keywords: Diabetic Neuropathy, Insulin, Glucagon, Insulin/ Glu Ratio.
      Issue No: Vol. 8
       
  • Green Approach to Corrosion Inhibition of Mild Steel in Sulphuric Acid
           Solution using Extract of Banana Leaves

    • Authors: Dakeshwar Kumar Verma, Fahmida Khan
      Abstract: The inhibition of the corrosion of mild steel in sulphuric acid solution by the extract of banana leaves has been studied using weight loss, Fourier transform infrared spectra and scanning electron microscopy techniques. Inhibition was found to increase with increasing concentration of the leaves extract. Maximum inhibition efficiency observed 94.91% at optimum concentration of inhibitor. The inhibition was assumed to occur via adsorption of the inhibitor molecules on the metal surface. The adsorption of the extract component on the mild steel surface obeys the Langmuir adsorption isotherm. The results obtained show that the extract of the leaves of banana could serve as an effective inhibitor of the corrosion of mild steel in sulphuric acid medium. Keywords: Adsorption, Corrosion, Mild steel, Weight loss, Inhibition efficiency
      Issue No: Vol. 8
       
  • Synthesis and Spectroscopic Studies of Some Macrocyclic Complexes Derived
           from Salicylaldehyde

    • Authors: Ali Alasmi Lena Radwan; , Joumaa Merza
      Abstract: The macrocyclic type Tetradentate ligand contain the nitrogen and oxygen as donor atoms have been prepared via the template reaction in two steps with their complexes of some metal ions, the reaction of one equivalent 1,2-phenylendiamine and two equivalent of salicylaldehyde obtained the precursor which the used in the template reaction since the 1,2-dibromoethane and metal salts [Co(II), Cu(II)] were added together as 1:1 ratio to the solution of precursor to form the macrocyclic complexes. The prepared compounds were characterized by Elemental analyses, FT-IR, UV-Vis, and 1H,13C-NMR. The spectral and physical studies show the suggested geometry around the all metals is octahedral. Keywords: salicylaldehyde, macrocyclic complexes, Copper (II), Cobalt (II) complexes.
      Issue No: Vol. 8
       
  • Determining Traces Metal Ions using Porphyrins as a Reagent

    • Authors: Ramla Abdullah
      Abstract: Porphyrins moleculars is a macrocyclic compounds, suitable to be an excellent analytical reagent for spectrum analysis due to its highest molar absorption coefficient, for its complexes with wide range for several metal ions compared with the open chain reagent, so it can be used to determine traces of metal ions which coordinate with it.The multiplity of the bands for porphyrins reagent itself which reach to five bands cover all the spectrum (350-800)nm create inefficient direct molecular spectrum methods, because of overlap between reagent spectrum and formed complex spectrum, for thought, employment of (HPLC) can separate the excess reagent from the formed complex ,and separate the formed complexes from each other, at the same time, because the difference at retention time in the column,  and all the formed complexes with porphyrin have a common absorbance band called (Soret band) appear in the range (400-420)nm which allowed to fixing wavelength in the detector on (HPLC), thus enable to record the analytical signal for nano molar concentration for most metal ions which coordinate with porphyrins molecular formed a chelate complexes, these formed complexes are very stable, the dissuasion possibility is less for long storage period, comparing with other reagents, the overlap  on spectrum will be minimized. This research can be a serious procedure to develop analytical high quality method to determine later transition metal ions, using HLPC technique and tetraphenylporphyrin (H2TPP), we have acheived the following : 1- We studied the chromatographic behavior for the H2TPP by using (UV-Vis) in several solvents: (DMF, CH2Cl2, CCl4,C6H5-CH3). 2- The possibility to form a chelating complex between H2TPP and Zn ion has been studied, in addition to all effective factors which include the best formation, we have reach to the optimum conditions.   we have known to the chromatographic behavior of formed complex, and reach to the optimum separation condition between the formed complex and the excess concentration of the reagent . 3- we calculated the steichiometric composition for the formed complex by (Molar ratio and continuous method), calculated the molar absorption coefficient for formed complex, its constant formation, the linear relation between the analytical signal (peak surface) and the Zn concentration was achieved, which in contestable to Lambert-Beer law in the wide range. 4- The proposed method was applied on model samples of Zn indented with its actual contain. 5- we reached to the optimum chromatographic peaks  separation for formed  complexes(Zn-TPP, Ni-TPP, H2TPP, VO-TPP), as the following retention time respectively : tR=4.2 <   tR=6  <   tR=6.8 < tR=12.4     (min) 6- We can confirmed according to the  results which we obtained: (RP-HPLC) to solve spectrums overlap between H2TPP and formed metal complexes,  the possibility to insulate analytical chromatography peaks: sharp, symmetric, and related to the metal ions concentration  in a wide range and for nanomol ion concentration, consequently it well allow us to determine traces of metal ions. Keywords: porphyrins  , chelate , complex , RP-HPLC ,  and traces ion.
      Issue No: Vol. 8
       
 
 
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