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  Subjects -> CHEMISTRY (Total: 826 journals)
    - ANALYTICAL CHEMISTRY (47 journals)
    - CHEMISTRY (576 journals)
    - CRYSTALLOGRAPHY (22 journals)
    - ELECTROCHEMISTRY (26 journals)
    - INORGANIC CHEMISTRY (41 journals)
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CHEMISTRY (576 journals)                  1 2 3 4 5 6 | Last

2D Materials     Hybrid Journal   (Followers: 4)
Accreditation and Quality Assurance: Journal for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 31)
ACS Catalysis     Full-text available via subscription   (Followers: 26)
ACS Chemical Neuroscience     Full-text available via subscription   (Followers: 15)
ACS Combinatorial Science     Full-text available via subscription   (Followers: 9)
ACS Macro Letters     Full-text available via subscription   (Followers: 20)
ACS Medicinal Chemistry Letters     Full-text available via subscription   (Followers: 25)
ACS Nano     Full-text available via subscription   (Followers: 378)
ACS Photonics     Full-text available via subscription   (Followers: 6)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 11)
Acta Chemica Iasi     Open Access  
Acta Chimica Sinica     Full-text available via subscription  
Acta Chimica Slovaca     Open Access   (Followers: 6)
Acta Chromatographica     Full-text available via subscription   (Followers: 10)
Acta Facultatis Medicae Naissensis     Open Access   (Followers: 1)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 4)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 5)
Adsorption Science & Technology     Full-text available via subscription   (Followers: 10)
Advanced Functional Materials     Hybrid Journal   (Followers: 39)
Advanced Science Focus     Free  
Advances in Chemical Engineering and Science     Open Access   (Followers: 23)
Advances in Chemical Science     Open Access   (Followers: 9)
Advances in Colloid and Interface Science     Full-text available via subscription   (Followers: 15)
Advances in Drug Research     Full-text available via subscription   (Followers: 17)
Advances in Enzyme Research     Open Access  
Advances in Fluorine Science     Full-text available via subscription   (Followers: 7)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 13)
Advances in Heterocyclic Chemistry     Full-text available via subscription   (Followers: 8)
Advances in Materials Physics and Chemistry     Open Access   (Followers: 16)
Advances in Nanoparticles     Open Access   (Followers: 12)
Advances in Organometallic Chemistry     Full-text available via subscription   (Followers: 9)
Advances in Polymer Science     Hybrid Journal   (Followers: 39)
Advances in Protein Chemistry     Full-text available via subscription   (Followers: 6)
Advances in Protein Chemistry and Structural Biology     Full-text available via subscription   (Followers: 10)
Advances in Quantum Chemistry     Full-text available via subscription   (Followers: 4)
African Journal of Chemical Education     Open Access   (Followers: 1)
African Journal of Pure and Applied Chemistry     Open Access   (Followers: 5)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access   (Followers: 1)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 1)
Alchemy     Open Access   (Followers: 3)
Alkaloids: Chemical and Biological Perspectives     Full-text available via subscription   (Followers: 5)
AMB Express     Open Access  
Ambix     Hybrid Journal   (Followers: 2)
American Journal of Applied Sciences     Open Access   (Followers: 32)
American Journal of Biochemistry and Biotechnology     Open Access   (Followers: 227)
American Journal of Biochemistry and Molecular Biology     Open Access   (Followers: 12)
American Journal of Chemistry     Open Access   (Followers: 18)
American Journal of Plant Physiology     Open Access   (Followers: 10)
American Mineralogist     Full-text available via subscription   (Followers: 7)
Analyst     Full-text available via subscription   (Followers: 38)
Angewandte Chemie     Hybrid Journal   (Followers: 18)
Angewandte Chemie International Edition     Hybrid Journal   (Followers: 281)
Annales UMCS, Chemia     Open Access   (Followers: 2)
Annual Reports in Computational Chemistry     Full-text available via subscription   (Followers: 1)
Annual Reports Section A (Inorganic Chemistry)     Full-text available via subscription   (Followers: 2)
Annual Reports Section B (Organic Chemistry)     Full-text available via subscription   (Followers: 5)
Annual Review of Chemical and Biomolecular Engineering     Full-text available via subscription   (Followers: 11)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 12)
Anti-Infective Agents     Hybrid Journal   (Followers: 1)
Antiviral Chemistry and Chemotherapy     Full-text available via subscription  
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 4)
Applied Spectroscopy     Full-text available via subscription   (Followers: 13)
Applied Surface Science     Hybrid Journal   (Followers: 21)
Arabian Journal of Chemistry     Full-text available via subscription   (Followers: 6)
ARKIVOC     Open Access   (Followers: 1)
Asian Journal of Biochemistry     Open Access   (Followers: 1)
Australian Journal of Chemistry     Hybrid Journal   (Followers: 4)
Autophagy     Full-text available via subscription   (Followers: 2)
Avances en Quimica     Open Access   (Followers: 1)
Biochemical Pharmacology     Hybrid Journal   (Followers: 6)
Biochemistry     Full-text available via subscription   (Followers: 288)
Biochemistry Insights     Open Access   (Followers: 4)
Biochemistry Research International     Open Access   (Followers: 4)
BioChip Journal     Hybrid Journal   (Followers: 1)
Bioinorganic Chemistry and Applications     Open Access   (Followers: 4)
Bioinspired Materials     Open Access  
Biointerface Research in Applied Chemistry     Open Access   (Followers: 1)
Biointerphases     Open Access  
Biomacromolecules     Full-text available via subscription   (Followers: 17)
Biomass Conversion and Biorefinery     Partially Free   (Followers: 6)
Biomedical Chromatography     Hybrid Journal   (Followers: 7)
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 2)
BioNanoScience     Partially Free   (Followers: 4)
Bioorganic & Medicinal Chemistry     Hybrid Journal   (Followers: 30)
Bioorganic & Medicinal Chemistry Letters     Hybrid Journal   (Followers: 24)
Bioorganic Chemistry     Hybrid Journal   (Followers: 5)
Biopolymers     Hybrid Journal   (Followers: 14)
Biosensors     Open Access   (Followers: 3)
Biotechnic and Histochemistry     Hybrid Journal   (Followers: 2)
Boletin de la Sociedad Chilena de Quimica     Open Access  
Bulletin of the Chemical Society of Ethiopia     Open Access   (Followers: 2)
Bulletin of the Chemical Society of Japan     Full-text available via subscription   (Followers: 13)
Canadian Association of Radiologists Journal     Full-text available via subscription   (Followers: 3)
Canadian Journal of Chemistry     Full-text available via subscription   (Followers: 6)
Canadian Mineralogist     Full-text available via subscription   (Followers: 1)
Carbohydrate Research     Hybrid Journal   (Followers: 11)
Carbon     Hybrid Journal   (Followers: 55)
Catalysis for Sustainable Energy     Open Access   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 6)

        1 2 3 4 5 6 | Last

Journal Cover   Chemistry and Materials Research
  [12 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 2224-3224 - ISSN (Online) 2225-0956
   Published by International Institute for Science, Technology and Education (IISTE) Homepage  [30 journals]
  • Cortisol levels, IFN-gamma and TNF-alpha in ischemic stroke patients

    • Authors: Luluk Widarti
      Abstract: Stress is one cause of stroke. Stroke is a disease that needs attention, given the increasing prevalence and cause of morbidity and mortality of patients. Model home care is an approach to holistic nursing care at home that emphasizes the intervention of bio-psycho-social-spiritual. This study aims to determine the effect of differences in the levels of cortisol, IFN-gamma and TNF-alpha before and after intervention between groups holistic model of home care and group home care. This research study design experiments with a model of the pre-post test group design and subjects were measured biological responses such as cortisol, IFN-gamma and TNF-alpha. The sample in this study were all patients with ischemic stroke who had been allowed to go home after hospitalization in room Seruni A Hospital Dr. Soetomo in 2009 and settled in the city of Surabaya consisting of 40 patients. The results showed differences in the levels of cortisol, IFN-gamma and TNF-alpha in patients after ischemic stroke before the homecare holistic intervention. There are differences in excess cortisol, IFN-gamma and TNF-alpha in patients with ischemic stroke who received care home model of care with a model of home care holistic. Keywords : Cortisol, IFN-gamma and TNF-alpha
      Issue No: Vol. 7
       
  • Survey in Substitution Reactions and Elimination Reactions

    • Authors: Nagham Mahmood Aljamali
      Abstract: The reactions of alkyl halides typically involve either substitution or elimination pathways. Depending on a variety of factors, the reaction mechanism can be either SN1, SN2, E1, E2, or some combination of these.  By understanding the influences different factors have on each of these mechanisms, it is usually possible to predict which mechanism will predominate. Keywords: SN1, SN2, E1, E2 ,elimination , substitution ,conditions.
      Issue No: Vol. 7
       
  • Cactus Potential in Heavy Metal (Pb and Cd) Removal in Water Sample
           Collected from Rural Area around Adigrat Town

    • Authors: Tessema Derbe
      Abstract: The main objective of this study is to investigate the heavy metals (Pb and Cd) removal capability of cactus powder from water sample using FAAS adsorption techniques by considering the influence of contact time, adsorbent dose and temperature on adsorption of Pb and Cd ions by cactus powder. The results revealed that adsorption of Pb and Cd ions increased as the dose of adsorbent increased at a certain limits. The heavy metal removal capability of cactus powder is affected by the present of NaCl salt. The heavy metal removal capability of cactus powder decreased from 65% up to 7% for Pb, and from 70% up to 14% for Cd as the dose of NaCl increased from 1g to 5g. The decrement in the removal of both Pb and Cd ions from water sample with increasing of NaCl is due to the formation of outer sphere complex with the NaCl salt which screening the functional group of cactus powder from heavy metals. The heavy metal removal capability of cactus powder also increased with contact time. The adsorption rate initially increased from 20% to 58 % for Pb ion, and 17% to 43% for Cd ion when the contact time increased from 30-120 min.  After 120 min there was no significant change in heavy metal removal of both Pb and Cd ions.  This might be due to end point at which adsorption phase reached to equilibrium. The percentage removal of Pb by cactus powder decreased from 65.05% to 29% as the temperature increased from 25 oC to150 oC.  In similar condition, the percentage removal of Cd by cactus powder also decreased from 43% to 31% as the temperature increased from 25 oC to150 oC.  This decrement in percentage removal of both Pb and Cd ions with increase temperature is due to the weak binding interaction between the active site of cactus powder and (Pb, Cd) ions which support physicosorption process. Keywords: Cactus Powder, Heavy Metal, Adsorbent, Adsorbate, Dose, Heavy Metal Removal and Active Site.
      Issue No: Vol. 7
       
  • Utilization of Laboratory Facilities and Students’ Academic
           Performance of Chemistry Students in Calabar, Nigeria

    • Authors: Neji; Hope Amba, Ukwetang, John.O, Nja, Cecilia. O
      Abstract: The study investigate  the utilization of laboratory facilities and their relationship with students’ academic performance in Calabar.  A total of three hundred and fifty students drawn from fourteen public secondary schools were used for this study. The data were analyzed using two instruments which include; questionnaire on utilization (QULF) Chemistry and Achievement Test (CAT).  The data collected were analyzed using population t-test and Pearson Product Moment Correlation. However, it was observed from the data analyzed that laboratory facilities are not adequately utilized in secondary schools for teaching Chemistry.  It was also noticed that laboratory facilities do not significantly contribute to the variance in students’ academic performance in Chemistry. Keywords: Academic, Facilities, Chemistry laboratory, utilization.
      Issue No: Vol. 7
       
  • Optimization Cloud Point Extraction Methodology for Separation ,
           Extraction and Spectrophotometric Determination of Zn(??)

    • Authors: Shawket.K. Jawad, Faris.H. Hayder
      Abstract: Extraction Zn+2 ion from aqueous solution according to CPE method by using laboratory prepared new organic agent2-(4–amino–N–5–methylisoxazol–3-yl)BezenSulfonamideazo–1–Naphthol–Benzen(AIBSNB) as complexing agent at PH=9 and by using Triton X–100 as surfactant , the method need heating to 90C? for 15 minutes , and then the cloud point layer(CPL)was separated and dissolved in 5ml ethanol to measure the absorbance of complex extracted at ?max=380nm .This research includes many studies such as thermodynamic , time of heating , interferences , effect of electrolyte salts , Stoichiometry Shows that the complex extracted is[Zn(AIBSNB)]+;Cl- or [Zn(AIBSNB–(Cl–)] synergism study shows participation one of TBP or MIBK in structure of complex extracted , this research appear ?=13067 L mol-1 cm-1, R.S.D=0.0068 , D.L=1.55×10-5 and Sandel’s sensitivits=0.0005?g cm-2. Key words:Zinc(??) , Cloud Point, extract (CPE), Solvent extraction,MIBK.
      Issue No: Vol. 7
       
  • Synthesis and Characterization of Some New Dianiline Oxide Derivatives

    • Authors: Afaq A. Turki, Aula A. Jumaa, Hannan A. Al-Hazam
      Abstract: Multifunctional dianiline oxide ligands from 1,3-indanedione with aniline derivatives in ethanol (abs.) then with hydrogen peroxide in gl acial acetic acid  (Scheme 1) were synthesized. These dianiline oxide  compounds have been characterized by C, H, N elemental analysis, FT-IR, and 1H NMR spectroscopy. Keywords: aniline oxide , indanedione, nitrone
      Issue No: Vol. 7
       
  • The Role of Vitamin D against to Lung Damage on Infected Mice by
           Mycobacterium tuberculosis

    • Authors: Hotmaida Siagian
      Abstract: Tubercolosis disease eradication efforts in Indonesia have been carried out using a strategy Directly Observed Treatment Short-Course (DOTS) to free treatment, but prevention and eradication is still not satisfactory. The sample consisted of 24 mice were divided randomly into two groups, one group was given oral vitamin D through 100ng of each mouse each day and the other group did not receive vitamin D, then each group was randomly divided into two groups were fed a vitamin D were infected with Mycobacterium tuberculosis and one group who did not receive vitamin D were infected with Mycobacterium tuberculosis.  b, IL-12 and Nfk-gat -14 in the week to check the levels of IFN-. ANOVA test was used to see the difference in vitamin D given to those not given vitamin D with p <0.05, there is an increase in levels of IL-12, p = 0.001 but no elevated levels of IFN-b. The results showed no effect of vitamin D increased expression Nfk- and results of research into the effects of infection with Mycobacterium tuberculosis found no elevated levels of IL-12, p = 0.00, but no increase in levels of IFN-? and-? expression Nfk. Results of research into the effects of Vitamin D and Mycobacterium tuberculosis infection found no elevated levels of IFN-? p = 0.043, but no increase in levels of IL-12, and Nfk-? expression  and decreased granuloma process, but not an increase in the expression of Nfk-? and IL-12. g Effect of vitamin D can increase the cellular immune response by increasing IFN- probable cause is the increasing Nfk-? expression induced by vitamin D due to increased transcription in the nucleus of cells that signal the cell nucleus to increase the production of IL-12. Then IL-12 increases Th1 response to produce IFN-?, increased IFN-? production and activates macrophages to kill Mycobacterium tuberculosis. Keywords: Vitamin D, Mycobacterium tuberculosis


      Issue No: Vol. 7
       
  • Effect of Cow Bone Ash Particle Size Distribution on the Mechanical
           Properties of Cow Bone Ash-Reinforced Polyester Composites

    • Authors: Temitope Adewole, Isiaka Oladele
      Abstract: This research work was carried out to study the influence of cow bone ash particles in polyester matrix composites in order to improve the properties of polyester matrix and to provide alternative use of cow bone which constitute a challenge to the environment especially in developing countries. Cow bone was sourced from an abattoir, washed, sun dried for 4week and then carbonized. The bone ashes were further pulverized using the ball mill. Sieve analysis was carried out on the pulverized bone ash particles into particle sizes of 75?m, 106?m and 300?m. Composite materials were developed by casting into tensile, hardness and flexural tests samples using pre-determined proportions of 2, 4, 6, and 8 wt % of the cow bone ash. The samples after curing were striped from the moulds and were allowed to further cure at room temperature for 3 weeks before tensile, hardness and flexural tests were performed on them.  The results shows that use of cow bone ash particles of 75,106 and 300 ????m led to the enhancement of the mechanical properties of polyester matrix.  The tensile result shows that sample reinforced with 4% of particle size 300µm gave the highest value of UTS, sample with 8% of particle size 300µm bone ash has the highest value of tensile modulus. Flexural strength were highly enhanced with 8% of particle size 75µm has the highest value of bending strength, this shows that fine particles lead to improved strength. The best result for hardness was obtained from 6wt% 106????m cow bone ash-reinforced sample with a value of 87.8HV compared to the unreinforced polyester matrix with a value of 81HV. Keywords: polyester, composites, mechanical properties, cow bone ash.
      Issue No: Vol. 7
       
  • Simple and Efficient One Pot Solvent Free Synthesis of
           3,4-Dihydropyrimidin-2(1H)-Ones and Thiones by using Ionic Liquid at
           Reflux Condition

    • Authors: MuralidharShingare SushilkumarDhanmane
      Abstract: A simple and efficient method for the one-pot Biginelli condensation reaction of aldehydes, ????-dicarbonyl compounds, and urea or thiourea is developed by using ionic liquid catalyst at reflux under solvent free condition. Keywords: Biginelli, ionic liquid, solvent free.
      Issue No: Vol. 7
       
  • Synthesis , Characterization and Antibacterial Activities of Co
           (II),Ni(II),Cu(II),Zn(II),Cd(II)and Hg(II) Mixed-Ligand Complexes of
           L-Proline and Trimethoprim antibiotic

    • Authors: Taghreed.H. AL-Noor, Lekaa K. Abdul Karim
      Abstract: The Co(II), Ni(II) ,Cu(II), Zn(II) ,Cd(II) and Hg(II) complexes of mixed of amino acid  (L-Proline ) and Trimethoprim antibiotic were synthesized. The complexes were characterized using solubility, melting  point, conductivity measurement   ,. and determination  the percentage of  the metal  in  the  complexes  by  flame(AAS).Magnetic susceptibility, Spectroscopic Method [FT-IR and UV-Vis].    Draw the proposed structure of the complexes using program ,  Chem. office 3D(2006). The   ligands   and  there metal complexes were  screened  for  their antimicrobial activity against  four bacteria (gram + ve) and (gram -ve){Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus}.The proposed structure of the complexes using program , Chem office 3D(2006).The general formula have been given for the prepared mixed ligand complexes   [M(Pro)2(TMP)(H2O)]where   L-Proline (abbreviated as  (ProH ) = C5H9NO2 And   Pro- = C5H8NO2 deprotonated  primary ligand, L-proline  . Trimethoprim (abbreviated as  (TMP ) =C10H11N3O3S . Keywords: Trimethoprim antibiotic, L-Proline   , Spectral and antibacterial activities.  
      Issue No: Vol. 7
       
  • Metal Ion Effect on the Absorbance Response of Chlorpheniramine Maleate in
           Pharmaceutical Dosage Form: A Study on Correlation between Spectroscopic
           and Potentiometric Measurements

    • Authors: Khalid Hamad Abu-Shandi
      Abstract: The interference between metal ions in human body and drug molecules is highly serious. A widely used drug by children and adults to treat throat pain and tonsillitis has been studied. The absorbance intensity of Chlorpheniramine Maleate drug in the presence of Fe3+, Co+2, Ca+2 and Mg+2 metal ions has been studied. The addition of Fe3+, Co+2, Ca+2 and Mg+2 metal ions to an aqueous solution of chlorpheniramine maleate increases the absorbance signal significantly and rapidly. These metals are chosen because they have high concentration in human body. Increasing the pH value of the aqueous solution of chlorpheniramine maleate has a contrary effect on the absorbance signal. Potentiometric measurements have been performed to correlate the spectrophotometric results and found to be consistent. Potentiometric and spectrophotometric measurements prove that there is a change in drug concentration at different pH value and to think carefully when using such drugs.   Keywords: Chlorpheniramine Maleate, spectrophotometric and Potentiometric measurements.
      Issue No: Vol. 7
       
  • Influence of Hydrated Calcium Sulphate (CaSO4.2H2O) and Nitrogen Levels on
           Water Infiltration Rate and Maize Varieties Productivity in Rainfed Area
           of Swat, Pakistan

    • Authors: IMRAN .
      Abstract: An experiment was conducted at Departmental Maize SMP and Demonstration Plots in all Circles Of district Swat during summer 2014. To study the response of maize to hydrated calcium sulphate (CaSO4.2H2O) and nitrogen levels and to enhance the water infiltration rate in rainfed areas of swat. Experiment was laid out in randomized complete block design (RCBD) with split plot arrangement. Data were recorded on days to tasseling, days to silking, ear length, grain ear-1, thousand grains weight (g) and grain yield (kg ha-1). Statistical analysis of the data showed that the effect of nitrogen and hydrated calcium sulphate (CaSO4.2H2O) on grains ear-1 was not significant. The effect of nitrogen and hydrated calcium sulphate (CaSO4.2H2O) on days to tasseling, days to silking, ear length (cm), thousand grains weight (g) and grains yield (kg ha-1) were significant. The effect of varieties was significant on all parameters. Higher grain yield (1819 kg ha-1) and thousand grains weight (279 g) were recorded with the application of 120-40 kg NS ha-1. Delayed days to tasseling (58.8) and silking (63.5) were observed at 200-0 kg NS ha-1. Higher days to tasseling (57.6 days), silking (63.5 days), thousand grains weight (278 g) and grain yield (1730 kg ha-1) were recorded in Pahari variety while Baber variety produced higher grains (422) ear-1 and ear length(15.9 cm).  40-120 kg NS ha-1 produced high yield.
      Issue No: Vol. 7
       
  • Synthesis, characterization and alteration of phenoxyherbicides-based
           nanocomposites resulted from mixing two herbicides with Zinc Oxide-layered
           hydroxide

    • Authors: Abbas M.Bashi, Jaleel; J. M Hanoon, Moh.Hussien Zobir, Zulkarnain Zainal
      Abstract: The present study is a part of an investigation of the effect of ZnO supported for two mixed agent (4-chlorophenoxy acetate (4CPA) as plant growth regulator  and 2,4-dichlorophenoxyacetates (2,4D) as herbicide ) synthesis via the ionic exchange with zinc Oxide layered hydroxide(LH). The product of this process led to the formation of nanocomposites assigned as (Zinc-NCPA). This byproduct represented a mixture of two newly phases was confirmed by X-Ray Diffraction (XRD) which were visualized at 25.6 and 19.14 Å, respectively. These findings were approved by images produced by Scanning Electron Microscopy (SEM). The maximum accumulated release of 4CPA and 2,4D was found to depend on the concentrations of the incoming ions. The accumulated rate of 4CPA was found to be less than 24D. The release behavior of the phenoxy acetate into the aqueous solution was controlled mainly by pseudo-second-order which was followed by pseudo-first order rate expression. This study concluded that Zinc Oxide layered hydroxide (ZLH) have the capability to act as a carrier for mixed active agents of two compounds with two different roles. aCorresponding author E.mail:abbasmatrood@yahoo.com Keywords: Controlled release, chlorophenoxy acetates, Zinc Oxide layered hydroxide, organic-inorganic hybrid nanocomposites
      Issue No: Vol. 7
       
  • Changes in Oil Palm Frond Fiber Morphology, Cellulose Crystallinity and
           Chemical Functional Groups during Cellulose Extraction Phases

    • Authors: Firda Aulya Syamani, Subyakto ., Sukardi ., Ani Suryani
      Abstract: Oil palm fronds (OPF) are agricultural by product and economical natural fibers resources. Cellulose is the main constituent in plant cell wall and because of its mechanical properties, cellulose fibers are potential to be utilized as reinforcement in composite product. The strength of cellulose is affected by its crystalline structure. To extract cellulose from natural fibers, lignin and hemicellulose have to be separated for instance by pulping and bleaching process. The main goal of this study was to observe changes in the OPF fibers morphology, cellulose crystallinity and chemical functional groups during cellulose extraction phases. Soda pulp of OPF was bleached using hydrogen peroxide. Subsequently, the bleached pulp was reacted with potassium hydroxide to eliminate hemicellulose. Afterward, further hydrogen peroxide bleaching was conducted to extract the cellulose. Surface morphological study using SEM revealed that there was a reduction in fiber diameter during cellulose extraction. Cellulose crystallinity and chemical functional groups at each phase of cellulose extraction were slightly different as demonstrated by XRD and FTIR analysis. Keywords: oil palm frond soda pulp, cellulose extraction, fiber morphology, cellulose crystallinity
      Issue No: Vol. 7
       
  • Oxalaceto(2-Chloro–6–Fluoro–Benzylidene) and
           Oxalaceto(2-Chloro-5–Nitrobenzylidene) Hydrazides and Spectroscopic
           Studies of the Complexes

    • Authors: Olalekan.W. Salawu, Ishaq.S. Eneji, Omotola.M. Fayomi
      Abstract: The synthesis, structure, spectral and biological studies of Cu(II), Mn(II), and Zn(II)  complexes of two kind of hydrazides ligand are described. The ligands was derived by the condensation of oxalaetic acid with hydrazine hydrate later substituted with two kind of benzaldehyde. These metal complexes were characterized by elemental analysis, molar conductance, magnetic moment measurements, IR, and spectral data. An octahedral geometry was proposed for all the metal complexes. It is evident from the IR data that in all the complexes, only two part of the ligands is coordinated to the metal ion resulting in binuclear kind of complexes. The ligand coordinates through the nitrogen atoms (C=N) of the azomethine  and oxygen atom of the carbonyl compound (C=O) of the hydrazide moiety. The formulations,- [Cu(HL1)], [Mn(HL1)], [Zn(HL1)], and [Cu(HL2)], [Mn(HL2)], [Zn(HL2)], are in accordance with elemental analyses, physical and spectroscopic measurements. The complexes are soluble in organic solvents dimethylsulphoxide ( DMSO). Molar conductance values in DMSO indicate the non electrolytic nature of the complexes. The ligands and metal complexes show a good activity against the bacteria; B. Subtilis, E.coli and S.aureus and fungi A.niger, A.flavus and C.albicans. The antimicrobial results also indicate that the metal complexes are better antimicrobial agents as compared to the ligands.
      Issue No: Vol. 7
       
  • Design and manufacture a new solar unit for distillation and water heating
           in Basrah City

    • Authors: Rusel . D . Salem, Aqeel . Y . Hashim, Jassim . M . AL-Asadi
      Abstract: In this paper a new solar unit for water heating and distillation has been designed and manufactured. It was operated for a period of 6 month from December 2013 to May 2014 in Basrah city which lies on longitude (47o45 ) and latitude (30o33 ). The average daily productivity of distilled water at the operated month was ranged between (8.4 -14.56) liter/m2 and a hot water at a temperature of 43-70 Co at a normal flow of 65 ml/min. Keywords: solar collector , solar energy , solar distillation , solar water heating , solar still.  
      Issue No: Vol. 7
       
  • Quality Analysis of Potable Water in Dowhan, Erop Wereda, Tigrai, Ethiopia

    • Authors: Hayelom Dargo Beyene
      Abstract: One of the important UN Millennium Development Goals is to reduce by half the proportion of people without sustainable access to safe drinking water by the year 2015. Quality analysis of drinking water is less studied even though peoples are consuming or drinking water day to day that may result the accumulation of unwanted materials in human body.   A study was carried out to assess the suitability of potable water used for domestic activities in Dawhan, Erope wereda, tigray Ethiopia. some water quality parameters such as total dissolved solids (TDS), Hardness, Chlorides, Sulphate. The results of the physical parameters revealed the following: total dissolved solids, 2500 mg/L exceeds the permissible value of WHO (500-2000mg/l), chloride, 200.293 mg/L, Hardness, 275.8 mg/L and sulphate, 490.085mg/L. Therefore, the concentration of sulphate exceeds the permissible value of WHO (200-400 mg/L). Key words: Total Dissolved Solids, Water Hardness, Sulphate, Chlorides. Water Quality  
      Issue No: Vol. 7
       
  • Journal Cover Page

    • Authors: Journal Editor
      Abstract: Journal Cover Page
      Issue No: Vol. 7
       
  • Bioadsorption of 2,6-Dichlorophenol from Aqueous Solution onto Plantain
           and Pineapple Peels Mixture Used as Adsorbent: Optimization Studies Based
           on Taguchi Method, Batch Equilibrium, and Kinetic Modelling

    • Authors: S. E. Agarry, O. O. Ogunleye
      Abstract: The feasibility of using pineapple/plantain peels mixture to remove 2, 6-dichlorophenol (2,6-DCP) from its aqueous solutions was investigated under batch mode. The effects of factors such as pH, initial 2, 6-DCP concentration, temperature and pineapple/plantain peels adsorbent ratio on the removal process were evaluated. Four factors and three levels according to Taguchi’s (L9) orthogonal array were used to assess and optimize the bioadsorption behaviour of pineapple/plantain peels mixture. Analysis of variance was applied to determine the significant factors that affect bioadsorption.  The levels of significant factors were optimized using Signal to Noise ratio. The results showed that bioadsorption of 2, 6-DCP was dependent on these factors. However, pH was the major factor that affects the percentage (%) removal of 2,6-DCP with its % contribution of 52.23. An optimum parameter combination for the maximum percentage removal of 2,6-DCP was obtained using the analysis of Signal to Noise (S/N) ratio. The best conditions for bioadsorption of 2,6-DCP were determined by the Taguchi method and desirability approach as pH = 7, initial 2,6-DCP concentration of 300 mg/l, temperature 50 °C, and pineapple/plantain adsorbent ratio of 2:1. The equilibrium bioadsorption data were analyzed by Langmuir and Freundlich isotherm models. The Freundlich isotherm model provided the best fit (R2 = 0.9980) to the experimental data. The maximum monolayer bioadsorption capacity ( ) was found to be 76.92 mg/g. The bioadsorption kinetics data of 2, 6-DCP were analyzed by pseudo-first-order, pseudo-second-order and intraparticle diffusion models. The pseudo-second order kinetic model gave the best fit. Therefore, pineapple/plantain peel adsorbent mixture has potential for application as an effective bioadsorbent for 2, 6-DCP removal from aqueous solution. Keywords: Bioadsorption; Bioadsorption isotherms; Kinetics; Pineapple-Plantain peel mixture; 2, 6-Dichlorophenol; Taguchi method.
      Issue No: Vol. 7
       
 
 
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