Antennas and Propagation of Implanted RFIDs for Pervasive Healthcare Applications

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Synthesis, characterization and antifungal studies on metal (II) complexes of tetradentate Schiff Base derived from ethylenediamine and 4-(benzeneazo) salicylaldehyde

The tetradentate Schiff base obtained in high yield (86.77%) from condensation of 4-(Benzeneazo) salicylaldehyde and Ethylenediamine was used for the synthesis of metal (II) complexes of Cu, Ni and Zn. Both the tetradentate Schiff base and its metal (II) complexes were characterized on the basis of FTIR, melting point/ decomposition temperature, solubility test, and elemental analysis. The ligand melted at 2000C while the complexes decompose at 2250C, 2400C 2600C for Zn(II), Ni(II) and Cu(II) complexes respectively. The solubility test for both Schiff base and the metal (II) complexes. The compounds were found to be soluble in DMF and DMSO and insoluble in water and slightly soluble in nitrobenzene. The results for elemental analysis indicated that there is close relationship between the calculated values and the obtained values using. The result for antifungal studies indicates that the compounds have low activity compared to the control sample.Keywords: Elemental analysis, Metal complexes, Schiff base, Solubility tes

ALIZARIN RED S DYE REMOVAL FROM SYNTHETIC EFFLUENT SOLUTION USING UNTREATED TYPHA GRASS ADSORBENT

Adsorption of anionic dye (ARS) on raw typha grass (RAW-TG) was studied in an equilibrium batch process. Optimizations were carried out to establish the effects of operational parameters: contact time (15 mins), initial dye concentration (120mg/L), adsorbent dose (0.02g) and pH (8) on the ARS removal. Some physical parameters of the RAW-TG were analysed to include bulk density (0.397g/cm3), pore volume (1.253cm3) and moisture content (17.80%). The adsorbent was further characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and point of zero charge (PZC) methods. Equilibrium data were mathematically modelled using the Langmuir, Freundlich, Temkin and Dubining Radushkevich (D-R) models. Kinetics of adsorption was determined by pseudo first-order, pseudo-second-order, Elovich and Intraparticle Diffusion models. The thermodynamics parameters of the adsorption process were calculated from Van’t Hoff plot. The data generated were best pronounced by pseudo-second-order model with a maximum adsorption capacity of 46.511mg/g and the adsorption isotherm was relatively favoured by Freundlich compared to other models tested. The thermodynamics parameters indicate the process was feasible and spontaneous with adsorption values of ∆G (-6.737 to -8.271kJ/mol), ∆H (16.616kJ/mol) and ∆S (16.616J/molK) respectively. The obtained results indicate that raw typha grass can serve as an outstanding alternative efficient adsorbent for the removal of ARS dye from waste water at low cost, eco-friendly and abundancy

Synthesis, characterization and antibacterial studies of tetradentate schiff base and their metal (II) complexes derived from 4-(Benzeneazo salicylaldehyde and ethylenediamine)

A tetradentate Schiff base was synthesized by the reaction of 4-(Benzeneazo) Salicylaldehyde and Ethylenediamine in their ethanolic solutions. The corresponding metal (II) complexes of the synthesized Schiff base were obtained by refluxing the ethanolic solutions of CoCl2, CrCl2, and MnCl2 salts. The physical properties of the Schiff base and its corresponding metal (II) complexes were investigated. The melting point temperature of the Schiff base was 200oC, while the decomposition temperatures of the complexes were 230 oC, 210 oC and 220 oC for Co (II), Cr (II), and Mn (II) complexes respectively. The magnetic susceptibility measurement reveals that all the complexes are paramagnetic in nature; the conductivity measurement shows that all the complexes are non-electrolytic in nature. The formation of the Schiff base and its metal (II) complexes were confirmed using FTIR spectroscopy. Both the Schiff base and its metal (II) complexes were found active against Staphylococcus aureus and Escherichia coli.Key words: Schiff base, metal complexes, magnetic susceptibility, conductivity, antibacterial

Spectral decomposition of starbursts and AGNs in 5-8 micron Spitzer IRS spectra of local ULIRGs

We present an analysis of the 5-8 micron Spitzer-IRS spectra of a sample of 68 local Ultraluminous Infrared Galaxies (ULIRGs). Our diagnostic technique allows a clear separation of the active galactic nucleus (AGN) and starburst (SB) components in the observed mid-IR emission, and a simple analytic model provides a quantitative estimate of the AGN/starburst contribution to the bolometric luminosity. We show that AGNs are ~30 times brighter at 6 micron than starbursts with the same bolometric luminosity, so that even faint AGNs can be detected. Star formation events are confirmed as the dominant power source for extreme infrared activity, since ~85% of ULIRG luminosity arises from the SB component. Nonetheless an AGN is present in the majority (46/68) of our sources.Comment: 5 Pages, 3 figures. MNRAS Letters, Accepte

Multi-Component Sequential Synthesis of Dihydroorotic Acid-Based Amphiphilic Molecules

An efficient multicomponent sequential process, which occurs in mild condition has been exploited for the synthesis of systematically modified amphiphilic molecules where the cationic head is tethered to a lipophilic tail through a dihydroorotic acid linker. The process is operatively simple, high yielding, and flexible. Such a strategy could impact combinatorial synthesis of wide libraries of amphiphilic molecules to be tested as transfection agents and/or as antimicrobials

ECONOMIC ANALYSIS OF IRISH POTATO (Solanum tuberasum) PRODUCTION UNDER IRRIGATION SYS- TEM IN KATSINA METROPOLIS, KATSINA LOCAL GOVERNMENT AREA, KATSINA STATE

A survey on economics analysis of Irish Potato (Solanum tuberasum) Production under irrigation sys- tem in Katsina Metropolis Katsina Local Government Area was carried out. Six communities were purposively selected due to the production of Irish potato. The communities were Kofar Sauri, Kofar Durbi, Kofar Marusa, Filin Samji, Rafukka and Yammawa. A simple random sampling was employed in selecting the farmers were by ten (10) farmers were randomly selected from each community which gave a total of sixty respondents. The data were obtained using structured questionnaire and sub- jected to descriptive statistics, gross margin and net farm income analysis. The research describes the socio economic characteristic of the respondents in which the respondents were within the mean age of 41 years. The result also showed hundred percent of the respondents were male, 66.6% were mar- ried, 30%, 31.6%, 33.3% and 5% had qur«¤??anic, primary, secondary and tertiary education respectively. The result also showed that 90% of the respondents«¤?? source their initial income for production of Irish potato from personal saving and 48.3% source information from mass media. The research also de- scribed the production characteristic of the respondents were majority (51.6%) cultivate 0.2-0.4ha, 81.6% acquired their land by inheritance, 88.3% practice sole cropping and 48.3% used family labor. Net Farm Income analysis revealed that Irish potato production in the study area is profitable with Net Farm Income of N5798.83, «¤?¢Ã21555.35 and «¤?¢Ã65399.48 for 0.2-0.4ha, 0.5-0.7ha and 0.8-1ha. The result further reveals that manure and fuel contributed toward the output for 0.2-0.4ha, manure, fuel, water and labour contributed for 0.5-0.7ha and manure, water and labour for 0.8-1ha. The result also identified some constraints to Irish potato production such as inadequate fertilizer, poor storage facili- ties, pest and diseases, inadequate extension advice, poor canal maintenance, inadequate capital, poor cooperation, adulteration of farm input, and marketing problem. Conclusively, net farm income result shows that Irish potato production is profitable in the study area. It is recommended that re- search into way of improving the method of storage should be promoted

Pengaruh Model Pembelajaran Inkuiri Dan Kreativitas Terhadap Keterampilan Generik Sains Siswa Di SMA Negeri 1 Peukan Pidie

Penelitian ini bertujuan untuk: (1) Mengetahui perbedaan keterampilan generik sains siswa menggunakan model pembelajaran inkuiri dan pembelajaran konvensional. (2) Mengetahui keterampilan generik sains antara siswa yang mempunyai kreativitas tinggi dan siswa yang mempunyai kreativitas rendah. (3) Mengetahui interaksi antara model pembelajaran inkuiri dengan kreativitas terhadap keterampilan generik sains siswa pada materi alat alat optik. Penelitian ini merupakan jenis penelitian quasi eksperimen. Populasi penelitian ini adalah seluruh siswa kelas X semester II SMA Negeri 1 Peukan Pidie T.A. 2013/2014 sebanyak 5 kelas (152 orang). Sampel penelitian terdiri dari 2 kelas yaitu kelas X-1 (kelas Eksperimen) dan kelas X-4 (kelas kontrol) yang ambil secara cluster random sampling. Instrumen penelitian berupas tes keterampilan generik sains dan tes kreativitas. Data dianalisis menggunakan SPSS 17, hasil pengujian hipotesis ANAVA 2 jalur sebagai berikut: (1) Model pembelajaran Inkuri lebih baik dalam meningkatkan keterampilan generik sains siswa dari pada pembelajaran konvensional. (2) Keterampilan generik sains siswa yang mempunyai kreativitas tinggi lebih baik dibanding dengan siswa yang mempunyai kreativitas rendah. (3) Ada interaksi antara model pembelajaran Inkuiri dengan pembelajaran konvemsional dan kreativitas terhadap keterampilan generik sains siswa