Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons™

Open Access. Powered by Scholars. Published by Universities.®

Journal

2014

Discipline
Institution
Keyword
Publication

Articles 1 - 30 of 1149

Full-Text Articles in Life Sciences

Perbedaan Pengaruh Circuit Training Dan Fartlek Training Terhadap Peningkatan Vo2max Dan Indeks Massa Tubuh, Muh. Akmal Almy, Sukadiyanto Sukadiyanto Dec 2014

Perbedaan Pengaruh Circuit Training Dan Fartlek Training Terhadap Peningkatan Vo2max Dan Indeks Massa Tubuh, Muh. Akmal Almy, Sukadiyanto Sukadiyanto

Jurnal Keolahragaan

Penelitian ini bertujuan untuk mengetahui: (1) metode circuit training lebih efektif daripada metode fartlek training dalam meningkatkan VO2Max pada pemain sepakbola (2) Indeks Massa Tubuh (IMT) rendah lebih baik/bagus daripada Indeks Massa Tubuh (IMT) tinggi terhadap peningkatan VO2 Max pemain sepakbola, (3) Ada kecenderungan interaksi antar kedua kelompok latihan dan Indeks Massa Tubuh (IMT) terhadap peningkatan VO2Max. Penelitian ini merupakan penelitian eksperimen dengan rancangan faktorial 2 x 2. Instrumen dalam penelitian ini adalah Multistage Test dan IMT. Hasil penelitian adalah sebagai berikut. (1) terdapat perbedaan pengaruh yang signifikan antara metode circuit training dan …

Go to article

Pengembangan Model Latihan Karate Kids Pada Anak Usia Sekolah Dasar Kelas Atas, Widha Srianto, Sugeng Purwanto Dec 2014

Pengembangan Model Latihan Karate Kids Pada Anak Usia Sekolah Dasar Kelas Atas, Widha Srianto, Sugeng Purwanto

Jurnal Keolahragaan

Penelitian ini bertujuan untuk menghasilkan model latihan karate kids pada anak usia sekolah dasar (SD) kelas atas (10-12 tahun). Penelitian pengembangan ini dilakukan dengan mengadaptasi langkah-langkah penelitian sebagai berikut: (1) pengumpulan informasi di lapangan, (2) melakukan analisis terhadap informasi yang telah dikumpulkan, (3) mengembangkan produk awal, (4) validasi ahli dan revisi, (5) uji coba lapangan skala kecil dan revisi, (6) uji coba lapangan skala besar dan revisi, dan (7) pembuatan produk final. Uji coba skala kecil dilakukan di klub Forki Kota Yogyakarta berjumlah 7 anak. Uji coba skala besar di klub Inkanas DIY berjumlah 16 anak. Instrumen pengumpulan data yang …

Go to article

Discrete Energies Of A Weakly Outcoupled Atom Laser Beam Outside The Bose–Einstein Condensate Region, Teguh Budi Prayitno Dec 2014

Discrete Energies Of A Weakly Outcoupled Atom Laser Beam Outside The Bose–Einstein Condensate Region, Teguh Budi Prayitno

Makara Journal of Science

We consider the possibility of a discrete set of energies of a weakly outcoupled atom laser beam to the homogeneous Schrödinger equation with anisotropic harmonic trap in Cartesian coordinates outside the Bose–Einstein condensate region. This treatment is used because working in the cylindrical coordinates is not really possible, even though we implement the cigar-shaped trap case. The Schrödinger equation appears to replace a set of two-coupled Gross– Pitaevskii equations by enabling the weak-coupling assumption. This atom laser can be produced in a simple way that only involves extracting the atoms in a condensate from by using the radio frequency field. …

Go to article

Development Of Suspended Particulate Matter Empirical Equation For Tropics Estuary From Landsat Etm+ Data, Razak Z, Zuhairi A, Shahbudin S, Rosnan Y Dec 2014

Development Of Suspended Particulate Matter Empirical Equation For Tropics Estuary From Landsat Etm+ Data, Razak Z, Zuhairi A, Shahbudin S, Rosnan Y

ASEAN Journal on Science and Technology for Development

Suspended Particulate Matter (SPM) essentially related to the total scattering of particles in the water column. It plays the role as a transport medium for pollutants, total load of organic and inorganic substance in the water phase. In this study, we have developed empirical relationship based on a strong relationship between Landsat near infrared (NIR) band and archived SPM data. The following were the power equations:SPM NE (mg/l) = 11.68x0.666SPM SW (mg/l) = 18.61x0.493where, x (TM4) is radiance of ETM+ NIR band 4 was developed under tropical atmospheric conditions. Using the above equation, the SPM concentration for Northeast and Southwest …

Go to article

Biodiesel Production From Castor Oil And Its Application In Diesel Engine, Ismail S, Abu S. A, Rezaur R, Sinin H Dec 2014

Biodiesel Production From Castor Oil And Its Application In Diesel Engine, Ismail S, Abu S. A, Rezaur R, Sinin H

ASEAN Journal on Science and Technology for Development

In this study, the optimum biodiesel conversion from crude castor oil to castor biodiesel (CB) through transesterification method was investigated. The base catalyzed transesterification under different reactant proportion such as the molar ratio of alcohol to oil and mass ratio of catalyst to oil was studied for optimum production of castor biodiesel. The optimum condition for base catalyzed transesterification of castor oil was determined to be 1:4.5 of oil to methanol ratio and 0.005:1 of potassium hydroxide to oil ratio. The fuel properties of the produced CB such as the calorific value, flash point and density were analyzed and compared …

Go to article

Drivers And Barriers For Going Green: Perceptions From The Business Practitioners In Malaysia, Loke S-P, Khalizani K, Rohati S, Sayaka A Dec 2014

Drivers And Barriers For Going Green: Perceptions From The Business Practitioners In Malaysia, Loke S-P, Khalizani K, Rohati S, Sayaka A

ASEAN Journal on Science and Technology for Development

The changes of global environmental conditions have placed great challenges to governments and societies. While it is not easy for the companies to go green, we need a renewed concern for our environment in order to revive the nation’s economic growth, social cohesion and ecological balances. This article identifies the drivers and barriers for the business industry to adopt green practices. A total of 571 business companies from the Perak State participated in this study. Four variables: (1) Regulations (β=0.159, p<0.05); (2) Social responsibility (β=0.201, p<0.05); (3) Pro-environmental organizational culture (β=0.389, p<0.01); and (4) Organizational supports (β=0.369, p<0.01) werefound to significantly affect the company’s green initiatives. The results indicated that the main internal barriers were: it lacked of financial resources (66.2%) and skilled staff (63.9%); whereas the main external barriers were: the penalty imposed were not severe enough for making any extra efforts (64.8%) and the penalty was light for violation of environmental regulations (63.2%). This research had implications for the academics, practitioners and policy makers. It provided greater insights into the green practices in Malaysian firms. The research findings also urged the local governments to greatly enhance regulatory scrutiny on the production and manufacturing industries.

Go to article

Long Wavelength Analysis Of A Model For The Geographic Spread Of A Disease, Layachi Hadji Dec 2014

Long Wavelength Analysis Of A Model For The Geographic Spread Of A Disease, Layachi Hadji

Applications and Applied Mathematics: An International Journal (AAM)

We investigate the temporal and spatial evolution of the spread of an infectious disease by performing a long-wavelength analysis of a classical model for the geographic spread of a rabies epidemic in a population of foxes subject to idealized boundary conditions. We consider twodimensional and three-dimensional landscapes consisting of an infinite horizontal strip bounded by two walls a finite distance apart and a horizontal region bounded above and below by horizontal walls, respectively. A nonlinear partial differential evolution Equation for the leading order of infectives is derived. The Equation captures the space and time variations of the spread of the …

Go to article

An Optimal Harvesting Strategy Of A Three Species Syn-Ecosystem With Commensalism And Stochasticity, M. N. Srinivas, A. Sabarmathi, K. S. Reddy, M. A. S. Srinivas Dec 2014

An Optimal Harvesting Strategy Of A Three Species Syn-Ecosystem With Commensalism And Stochasticity, M. N. Srinivas, A. Sabarmathi, K. S. Reddy, M. A. S. Srinivas

Applications and Applied Mathematics: An International Journal (AAM)

In this paper we have studied the stability of three typical species syn-ecosystem. The system comprises of one commensal S1 and two hosts S2 and S3 . Both S2 and S2 benefit S1 without getting themselves affected either positively or adversely. Further S2 is a commensal of S3 and S3 is a host of both S1 and S2. Limited resources have been considered for all the three species in this case. The model equations of the system constitute a set of three first order non-linear ordinary differential equations. …

Go to article

Salicylic Acid Treatment Increases Salt Tolerance Of Wheat Plants By Enhancing Antioxidant Defense Systems, Abdel Kareem Mohamed Dec 2014

Salicylic Acid Treatment Increases Salt Tolerance Of Wheat Plants By Enhancing Antioxidant Defense Systems, Abdel Kareem Mohamed

Al-Azhar Bulletin of Science

The present study was conducted to assess influence of salinity and varying concentrations of salicylic acid (0.5 mM and1mM SA) on growth, antioxidant enzyme activities and biochemical activities of wheat plants. Wheat (cv. Sods 12) was grown in a normal clay soil for 30 days. The treatments comprised of control, 50 mM NaCl, 100 mM NaCl, and 150 mM NaCl. Except control, the concentrations of NaCl at all levels were applied through irrigation. After harvest, the plant samples were analyzed for photosynthetic pigments, proline content, electrical conductivity, and cell membrane stability. The results show significant decline in vegetative parameters (e.g., …

Go to article

Bibliography For Work In Ecocriticism, Zümre Gizem Yılmaz Dec 2014

Bibliography For Work In Ecocriticism, Zümre Gizem Yılmaz

CLCWeb: Comparative Literature and Culture

No abstract provided.

Go to article

Optimization Of Desulfurization Process Through Studying The Ladle Refining Furnace Parameters, Gamal El-Kady, Mohamed El-Fawkhry, Arafat Merdach Dec 2014

Optimization Of Desulfurization Process Through Studying The Ladle Refining Furnace Parameters, Gamal El-Kady, Mohamed El-Fawkhry, Arafat Merdach

Al-Azhar Bulletin of Science

This research aims to optimize of the desulfurization process through the ladle-refining furnace in the melting shop ofAbu Zaabal for Industrial Engineering Company. The Optimization of desulfurization process has been studied in the LadleRefining Furnace of the melting shop with respect to the amount of desulfurizing agent, deoxidation power of Silicon, Stirring energy, and the temperature as well as The composition and the sulfur content of slag have been determined to calculate the partition coefficient of sulfur at different deoxidizer content, and different content of desulfurizing agent. Y. Yang and Sosinsky- Sommerville modelshave been used to determine the deviation between …

Go to article

Microbial And Physicochemical Evaluation Of Groundwater Resources For Human Domestic Consumption In Alfath Urban, Assuit, Egypt, Mustafa Ramadan, Usama Abdol-Raouf, Elsayed Bakhiet Dec 2014

Microbial And Physicochemical Evaluation Of Groundwater Resources For Human Domestic Consumption In Alfath Urban, Assuit, Egypt, Mustafa Ramadan, Usama Abdol-Raouf, Elsayed Bakhiet

Al-Azhar Bulletin of Science

Sewage is the primary source of faecal contamination of groundwater with pathogenic bacteria. Protecting groundwaterfrom microbial contamination is a top public health priority, This study deals with evaluation of groundwater wells, groundwater well based-plants, in Alfath lying in Eastern area of Nile Basin, Assuit at summer 2014 with assessment of presence ofthermotolerant faecal coliform and thermotolerant faecal streptococci bacteria as a potent indicators for faecal contamination,we used a multiple-tube fermentation or membrane filtration for enumerating themotolerant faecal coliform and thermotolerantfaecal streptococci using most-probable-number (MPN) index. This study consisted of a total of 75 water samples obtainedfor routine testing at summer …

Go to article

There May Not Always Be More Fish In The Sea: Why Noaa’S Restrictions Do Not Violate The Magnuson-Stevens Act, Lindsey Nicolai Dec 2014

There May Not Always Be More Fish In The Sea: Why Noaa’S Restrictions Do Not Violate The Magnuson-Stevens Act, Lindsey Nicolai

William & Mary Environmental Law and Policy Review

No abstract provided.

Go to article

Stream Sediments Survey For Uranium In Wadi El-Reddah, North Eastern Desert, Egypt, H. A., El Nahas,, O. A., Desouky,, M., Abdel Monsif,, N. S. Elsayed, Dec 2014

Stream Sediments Survey For Uranium In Wadi El-Reddah, North Eastern Desert, Egypt, H. A., El Nahas,, O. A., Desouky,, M., Abdel Monsif,, N. S. Elsayed,

Al-Azhar Bulletin of Science

The radiometrical study carried out for the stream sediments of Wadi El-Reddah reveals that uranium is in a disequilibrium state and uranium concentrations in recent uranium deposits are seldom detected by scintillometer. On this base, two types of uranium deposits of the studied sediments are recorded; old and recent uranium deposits. eTh/eU ratio of old uranium deposits in the studied sediments suggests poor weathering and rapid deposition of rock detritus. On the other hand, eTh/eU ratio of recent uranium deposits indicates that these sediments are developed under conditions where uranium was removed from its source and fixed in the sediments …

Go to article

Influence Of Polymer Molecular Weight On Light Harvesting And Performance Parameters Of The Organic Solar Cell, Yasser Ismail, Naoki Kishi, Tetsuo Soga Dec 2014

Influence Of Polymer Molecular Weight On Light Harvesting And Performance Parameters Of The Organic Solar Cell, Yasser Ismail, Naoki Kishi, Tetsuo Soga

Al-Azhar Bulletin of Science

In the present article, we try to illustrate the behavior of the most common organic solar cell under the influence of polymermolecular weight (in the range of 21,100-128,800 g/mol) on light harvesting and device performance parameters. The presentwork demonstrates that, the molecular weight of donor polymer plays an important role in the light harvesting and performanceof a common-bulk heterojunction organic solar cell based on poly(3-hexylthiophene) (P3HT), as a donor polymer, and[6,6]-phenyl-C61-butyric acid methyl ester (PCBM), as an acceptor. Through this study it is found that, the optical absorptionof P3HT:PCBM solar cell active layer is increased by increasing P3HT molecular weight. …

Go to article

Mineralogical, Geochemical And Environmental Deposition Of Clay In Esna Shale At El-Buruk – El-Hassana And El-Himmah – Baghdad Areas North Sinai, Egypt., M.H Awad,, G.A Al Nadeem,, S.A. Sameeh,, I.M Osman, Dec 2014

Mineralogical, Geochemical And Environmental Deposition Of Clay In Esna Shale At El-Buruk – El-Hassana And El-Himmah – Baghdad Areas North Sinai, Egypt., M.H Awad,, G.A Al Nadeem,, S.A. Sameeh,, I.M Osman,

Al-Azhar Bulletin of Science

This paper deals with the study of the Mineralogical, Geochemical and Environmental deposition of Clays in Esna Shale at El-Buruk- El-Hassana and El- Himmah Baghdad areas, North Central Sinai, Egypt. The present work is based on the field and laboratory work carried out by present authors. sixty stratigraphic sections representing Esna shale unit in the study area were studied, measured and sampled. The laboratory work comprise 17 samples for XRD analysis to study the mineral constituents of the clay and argillaceous rocks and 36 samples for chemical analysis using XRF method to detect the major oxides SiO2, Al2O3, Fe2O3, CaO, …

Go to article

Response Of Wheat (Triticum Aestivum L.) Plants To Foliar Spraying Of Some Bio-Stimulants (Yeast Extract, Arginine, B12 And Their Interactions), Mohamed Ismail, Mohamed Amin Dec 2014

Response Of Wheat (Triticum Aestivum L.) Plants To Foliar Spraying Of Some Bio-Stimulants (Yeast Extract, Arginine, B12 And Their Interactions), Mohamed Ismail, Mohamed Amin

Al-Azhar Bulletin of Science

A field experiments were carried out in season of 2013/2014 at Botanical garden, Botany and Microbiology Dept., Fac. ofSci., Al- Azhar Univ., Nasr City, Cairo, to study the effect of foliar applications of some bio-stimulants (dry yeast extracts, arginine,B12 and their interactions) on growth, total yield, quality and some chemical constituents of wheat plants. Results showedthat, foliar spraying of wheat plants with bio-stimulants especially yeast extract had a significant effect on vegetative growth,yield and quality. Shoot fresh weight of wheat plants were improved by yeast extract at all doses and B 12 foliar applicationduring the first stage. Results showed that …

Go to article

Verification Of 235u, 238u By Mathematical Calibration Curve For Point Sources By Using Monte Carlo, S. A. Makhlouf Dec 2014

Verification Of 235u, 238u By Mathematical Calibration Curve For Point Sources By Using Monte Carlo, S. A. Makhlouf

Al-Azhar Bulletin of Science

The calibration of -ray spectrometer was performed by means of a set of certified standard point sources of energies thatcover the energy range of interest. The value of the absolute full energy peak efficiency "ab “ could be found by measuring“CR” experimentally and the use of the known value of “ A “. Also, it is possible to calculate “ab” for a certain source todetector distances (D) by using Monte Carlo [MC] simulation method.The obtained results indicated that the fitting is identical to the experimental curve and MCNP calculations, that is boththese two methods (experimental and MCNP) can be used …

Go to article

Population Structure Of The Potato Tuber Moth ,Phthorimaea Operculella (Zeller) , Lepidoptera: Gelechiidae) In Delta Egypt Using Rapd Analysis, Mohamed Elshehaby Dec 2014

Population Structure Of The Potato Tuber Moth ,Phthorimaea Operculella (Zeller) , Lepidoptera: Gelechiidae) In Delta Egypt Using Rapd Analysis, Mohamed Elshehaby

Al-Azhar Bulletin of Science

Little is known about the nature and extent of genetic diversity in potato tuber moth Phthorimaea operculella (Zeller),Lepidoptera: Gelechiidae). Analysis of amplified fragment length polymorphism (AFLP) has the potential to become a powerfulnew DNA fingerprinting technique for studying genetic relationships and genetic diversity in insects. Random amplifiedpolymorphic DNA polymerase chain reaction (RAPD-PCR)was used to examine variation in three governorates in the Deltaof Egypt. The objective of this study was to provide baseline information on the population structure of potato tuber worm inEgypt. The applicability of CTAB -based DNA extraction protocol provided suitable for AFLP analysis. Potato tuber wormadults were collected …

Go to article

Spectral Study For The Effect Of Solvent Dielectric Constant On The Optical Band Gap For (4-Oxothiazolidin-2-Ylidene) Acetonitrile., M. Ibrahim, G. A. M. El Hag Ali Dec 2014

Spectral Study For The Effect Of Solvent Dielectric Constant On The Optical Band Gap For (4-Oxothiazolidin-2-Ylidene) Acetonitrile., M. Ibrahim, G. A. M. El Hag Ali

Al-Azhar Bulletin of Science

Heterocyclic compound of (4-oxothiazolidin-2-ylidene) acetonitrile was prepared in powder form. The crystallinenature of the prepared sample was checked by X- ray diffraction (XRD). IR absorption spectra were recorded on aShimadzu 440 infrared spectrophotometer (cm-1) using the KBr technique (Shimadzu, Japan). Reflection spectraof the powder sample were obtained in the wavelength range (200-2500 nm) at room temperature using spectrophotometer.Absorption and transmission spectra of the prepared sample were obtained in different solvents inthe wavelength range (190-1100nm).The solvent used are acetone, dimethyformamid (D.M.F.) and glycerol. Themeasurements were carried out at room temperature using (JENWAY 6405 UV/VIS) spectrophotometer. The opticalenergy gap which is the …

Go to article

The Lte Solar Abundance Of Neodymium, Abdelkawy A.G.A., Shaltout A.M.K., Beheary M.M., Bakry A. Dec 2014

The Lte Solar Abundance Of Neodymium, Abdelkawy A.G.A., Shaltout A.M.K., Beheary M.M., Bakry A.

Al-Azhar Bulletin of Science

We study the solar photospheric abundance of singly ionized neodymium (Nd II) using high resolution spectroscopic dataobtained by Fourier transform spectrograph (FTS). Based on the Local Thermodynamical Equilibrium (LTE) assumption,a new value of Nd abundance is derived. We succeed to select of 51 solar Nd II lines with accurate transition probabilitiesmeasured experimentally by Den Hartog et al. (2003) and with accurate damping parameters are determined from literature.Relying on atomic data of Opacity Distribution Function (ODF), we construct theoretical photospheric solar model.The meansolar photospheric abundance obtained from all 51Nd II lines is log εNd= , which is mostly similar to the …

Go to article

Perturbation Effect On Ground Tracks Of Molniya Satellite Orbits, Awad M.E., Hassan I.A., Dewdar H.R., Tealib S.K. Dec 2014

Perturbation Effect On Ground Tracks Of Molniya Satellite Orbits, Awad M.E., Hassan I.A., Dewdar H.R., Tealib S.K.

Al-Azhar Bulletin of Science

The main concern in the present research work is to define the basic requirements study of manyperturbations forces that affect ground tracks of Molniya satellite orbits.In this we are going to design a mathematical model to calculate the footprint of any satellite takinginto account the effect of disturbing forces (oblatness and solar radiation pressure) in order to get themost accurate sub-satellite point, matlab language is used to design program to calculate themathematical models of footprint satellites with numerical application of some different Molniyasatellites orbit.

Go to article

Inheritance Mode Of Virulance In Nectria Haematococca Matting Population I, Ahmed Kasem Dec 2014

Inheritance Mode Of Virulance In Nectria Haematococca Matting Population I, Ahmed Kasem

Al-Azhar Bulletin of Science

The difference in virulence of two standard strains in colonizing seedling hypocotyle and fruit exocarp suggested thatmulti-locus control of this trait. Whereas, Strain ATCC18099 was unable to infect uninjured cucumber and Zucchini fruits, both strains had high virulence against seedlings. The inheritance mode of this trait was studied by tetrad and random ascospore analysis with ascospores obtained from reciprocal crossings between ATCC18098 and ATCC18099. Segregation of MAT and perithecial color was also examined in both types of ascospore analyses. The results of tetrad analysis indicated 4:4 segregation for the high virulence associated with strain ATCC18098 in each tetrad, suggesting a …

Go to article

Synthesis, Characterization And Photoluminescenceproperties Of New Coumarin Hydrazide And Its Lanthanide (Iii) Complexes, Badr Elsayed, Ibrahem Ibrahem, Salah Shaaban, Mohamed Elsenety Dec 2014

Synthesis, Characterization And Photoluminescenceproperties Of New Coumarin Hydrazide And Its Lanthanide (Iii) Complexes, Badr Elsayed, Ibrahem Ibrahem, Salah Shaaban, Mohamed Elsenety

Al-Azhar Bulletin of Science

A novel coumarin hydrazide ligand derived from the condensation of 7-hydroxy coumarin-4-ethylacetate with salicylaldehyde hydrazone and its complexes with Sm(III) and Eu(III) have been synthesized. The ligand and its complexes have been characterized by the Elemental analysis, Molar conductivity, FTIR, 1HNMR, and U.V. & Visible spectra. The complexes have stoichiometry of the type [Ln(L)2(H2O)2]NO3.2H2O where the ligand (HL) coordinates to the lanthanide ions Sm(III) and/or Eu(III) through azomethine nitrogen atom, phenolic oxygen of hydrazide moiety after deprotonation and ketonic oxygen of coumarin moiety. The fluorescence properties of complexes in different organic solvents (DMSO, DMF, Acetonitrile and Ethanol) have been studied. …

Go to article

Synthesis And Characterization Of Superabsorbent Hydrogel Based On Sugarcane Bagasse Grafted Onto Polyacrylic, Mohammed Ghazy Dec 2014

Synthesis And Characterization Of Superabsorbent Hydrogel Based On Sugarcane Bagasse Grafted Onto Polyacrylic, Mohammed Ghazy

Al-Azhar Bulletin of Science

Superabsorbents hydrogel were prepared by grafting of sugarcane bagasse on polyacrylic acid by using N, N\ -methylenebisacrylamide as cross-linker and ammonium persulphate as initiator. Factors such as weight ratios of bagasse and acrylicacid monomer that affect the properties of the product were investigated. Properties of superabsorbent such as water uptake,gel fraction,morphological structure and thermal properties were also examined.

Go to article

Extraction Of Radium Isotopes From Some Coastal Seawater Samples In Egypt Method Validation, Heba Abd El-Ghaffar, Wafaa Bakr, Rabab Abou Shahba Dec 2014

Extraction Of Radium Isotopes From Some Coastal Seawater Samples In Egypt Method Validation, Heba Abd El-Ghaffar, Wafaa Bakr, Rabab Abou Shahba

Al-Azhar Bulletin of Science

A radiochemical separation of Ra isotopeswas carried out to determine the activity levels of radium (226Ra and 228Ra)in seawater samples, as well as providing a base-line data on background radiation in the investigated locations. Seawatersamples were collected from selected sites along the coasts. The water samples were analyzed for radium isotopes (Ra-226 & Ra-228) using alpha and liquid scintillation detectors.Development steps were applied to the radioanalysis procedure by using calcium phosphate co-precipitation and the addition of isopropanol. Quality assurance and method validation of the developed procedure was carried out to assure the results. The obtained results were within the uncertainty …

Go to article

Synthesis, Characterization And Antimicrobial Evaluation Of Some Thiazolidinonederivatives Bearing Pyridine Moiety: Search For Antimirobial Agent, Ali Khalil, Raafat Elisway, H. Eyada, Hazem Mohamed, Gameel El-Hag Ali Dec 2014

Synthesis, Characterization And Antimicrobial Evaluation Of Some Thiazolidinonederivatives Bearing Pyridine Moiety: Search For Antimirobial Agent, Ali Khalil, Raafat Elisway, H. Eyada, Hazem Mohamed, Gameel El-Hag Ali

Al-Azhar Bulletin of Science

2-(4-Oxothiazolidin-2-ylidene)acetonitrile and ethyl -2-(4-oxothiazolidin-2-ylidene)acetate (1a,b),were condensedwith anthralaldehyde(1:1 molar ratio) and gave 4,5-dihydro- 4-oxothiazole derivatives (2a,b).Refluxingof 2-(antharacene-9-yl-methylene) malononitrile in acetic acid with thioglycollic acid gave(3).4-Thiaz -olidinones containing bis- aryl methylidine moieties(4a-c) and (5a,b)were produced via condensation of either(2a) or (3) with aromatic aldehydes(1:1 molar ratio). Heating of (2a) with α-substituted cinnamonitriles gave the expected substituted thiazolo[3,2-a] pyridines (6a-d),(7) and (9a-c). Thiazolo [3,2-a] pyridine enamino- nitrile (6a) was refluxed with formic acid and phenyl hydrazine to form the corres-ponding thiazolo [3,2-a] pyridine derivatives (10) and (11) derivatives respectively.The structures of the prepared compounds were confirmed by using spectroscopic techniques; IR; 1HNMR ;13C …

Go to article

Hairy Stalagmites, A New Biogenic Root Speleothem From Botswana, Gerhard C. Du Preez, Paolo Forti, Gerhard Jacobs, Anine Jordaan, Louwrens Tiedt Nov 2014

Hairy Stalagmites, A New Biogenic Root Speleothem From Botswana, Gerhard C. Du Preez, Paolo Forti, Gerhard Jacobs, Anine Jordaan, Louwrens Tiedt

International Journal of Speleology

Ngamiland in northwestern Botswana hosts the Gcwihaba Caves which present unique subterranean environments and host speleothems never before recorded. Cave atmospheric conditions can be extreme with temperatures as high as 28°C and relative humidity nearing 99.9%. Within Dimapo and Diviner’s Caves peculiar root speleothems that we named ‘Hairy Stalagmites’ were found. These stalagmites are closely associated with the roots of Namaqua fig (Ficus cordata) trees that enter the cave environment in search of water. Pieces of broken stalagmites were sampled from Dimapo Cave for further investigations. Stereo and electron microscopy revealed that the Hairy Stalagmites consist of multiple …

Go to article

Parental Involvement During Adolescence And Contraceptive Use In College, Caroline Payne Purvis, Rosemary V. Barnett, Larry Forthun Nov 2014

Parental Involvement During Adolescence And Contraceptive Use In College, Caroline Payne Purvis, Rosemary V. Barnett, Larry Forthun

Journal of Adolescent and Family Health

The current study aimed to explore the relationships between parental involvement during adolescence on sexual behaviors among college students. Research has shown that parental involvement decreases as students move from high school to college, but the impact that parents had on their students while in high school continues into college. It is important to determine if one factor relating to the number of sexual partners, sexual activity, and contraceptive use is parental involvement during adolescence. After approval from the Institutional Review Board (IRB), an online survey using Survey Monkey was administered to a convenience sample of undergraduate students in a …

Go to article

University Professors’ Perceptions About The Impact Of Integrating Google Applications On Students’ Communication And Collaboration Skills, Jacqueline L. Cahill Nov 2014

University Professors’ Perceptions About The Impact Of Integrating Google Applications On Students’ Communication And Collaboration Skills, Jacqueline L. Cahill

Journal of Research Initiatives

A qualitative research study was conducted and data were collected by interviewing university professors on their perceptions about the impact of integrating Google Apps, as a means of classroom instructional delivery, on students’ communication and collaboration skills. The participants consisted of eight university professors from a major university, who integrate, or had previously integrated at least two Google Apps Education Edition collaborative tools into their instructional strategies. The result of this study has the potential to benefit universities that are debating on whether utilizing teaching collaborative technology skills, as an instruction tool, would engage students and enhance their communication skills. …

Go to article

Next Last