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85 articles for “Fractions”
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Research ArticleOpen accessIn the abstractCryptolepine Provokes Changes in the Expression of Cell Cycle Proteins in Growing CellsCharles Ansah, Nigel J. GooderhamProblem statement: Cryptolepine, the antimalarial plant alkaloid is cytotoxic to mammalian cells, but there is rather little understanding of the possible mechanisms involved in the cell-kill action of cryptolepine. Approach: We examined mammalian cells exposed to cryptolepine (0.5-5.0 μM) for effects on the cell cycle and associated alterations in the levels of major regulatory proteins using immunoblotting and flow cytometry. … …American Journal of Pharmacology and Toxicology, Vol. 4, Issue 4 · 31 Dec 2009 · 7,396 accessesView PDFCite
Research ArticleOpen accessIn the abstractRocks with Asbestos: Risk Evaluation by Means of an Abrasion TestBellopede Rossana, Clerici Carlo, Marini Paola, Zanetti GiovannaNaturally occurring asbestos and asbestiform minerals can be found in metamorphic rocks and in the soil of the alluvial plains. Problem statement: The definition of the "free-asbestos rock" and the limit to consider a rock or a soil safe is still a controversial issue. American and European laws did not present any method to define the hazard of the green … …American Journal of Environmental Sciences, Vol. 5, Issue 4 · 31 Oct 2009 · 7,667 accessesView PDFCite
Research ArticleOpen accessIn the abstractCharacterization of Bio-Oil: A By-Product from Slow Pyrolysis of Oil Palm Empty Fruit BunchesK. H. Khor, K. O. Lim, Z. A. ZainalProblem statement: Oil palm Empty Fruit Bunches (EFB) are abundant biomass in Malaysia. Studies about production of biofuels using slow pyrolysis of EFB are still lacking. So, this study was aimed to understand the physical and chemical properties of the bio-oil and its simple blends. Approach: EFB was slow pyrolysed with internal heating at terminal temperature of 600°C in a … …American Journal of Applied Sciences, Vol. 6, Issue 9 · 30 Sep 2009 · 8,016 accessesView PDFCite
Research ArticleOpen accessIn the abstractDistribution of β-Glucosidase Activity within Aggregates of a Soil Amended with Organic FertilizersSaeid Hojati, Farshid NourbakhshProblem statement: Distribution pattern of enzyme activities in soil aggregate size classes as affected by organic amendments is not well understood. Approach: A study was conducted to evaluate the effects of repeated annual application of Cow Manure (CM), Sewage Sludge (SS) and Municipal Solid Waste Compost (MSW) on the distribution of β-Glucosidase (βG) activity within aggregates of a soil. Soil … …American Journal of Agricultural and Biological Sciences, Vol. 4, Issue 3 · 30 Sep 2009 · 8,183 accessesView PDFCite
Research ArticleOpen accessIn the abstractAntimicrobial Activity of Some Medicinal Plants from MalaysiaKoshy Philip, Sri Nurestri Abd Malek, Wirakarnain Sani et al.Problem statement: About 32 extracts from eight selected medicinal plants, namely Pereskia bleo, Pereskia grandifolia, Curcuma aeruginosa Roxb., Curcuma zedoria, Curcuma mangga, Curcuma inodora aff. Blatter, Zingiber officinale var. officinale (jahe gajah) and Zingiber officinale var. rubrum (jahe emprit) used by Malaysia traditional health care systems were screened for their antimicrobial activity against both Gram-positive bacteria and Gram-negative bacteria using … …American Journal of Applied Sciences, Vol. 6, Issue 8 · 31 Aug 2009 · 9,728 accessesView PDFCite
Research ArticleOpen accessIn the abstractStrength Modeling of High-Strength Concrete with Hybrid Fibre ReinforcementA. Ravichandran, K. Suguna, P. N. RagunathThe low tensile strength and limited ductility, the unavoidable deficiency, of concrete can be overcome by the addition of fibres. High strength concrete (HSC) of 60 MPa containing hybrid fibres, combination of steel and polyolefin fibres, at different volume fraction of 0.5, 1.0, 1.5 and 2.0% were compared in terms of compressive, splitting tensile strength and flexural properties with HSC … …American Journal of Applied Sciences, Vol. 6, Issue 2 · 28 Feb 2009 · 7,541 accessesView PDFCite
Research ArticleOpen accessIn the abstractDistillation and Microdiffusion Modifications for total Nh4f Quantification and 15N RecoveryGaius D. Eudoxie, Gregory A. GouveiaProblem statement: Applying 15N techniques to accurately determine the fate of fixed ammonium (NH4f) in the strongly and weakly held pools require modifications to existing methodologies. Modifications are necessary for measurement of total NH4f in soils by direct digestion with 5 M HF: 1 M HCl, excluding alkali pretreatment, followed by distillation and quantification of NH4. Quantification by distillation was … …American Journal of Agricultural and Biological Sciences, Vol. 3, Issue 4 · 31 Dec 2008 · 7,588 accessesView PDFCite
Research ArticleOpen accessIn the abstractDuctility Performance of Hybrid Fibre Reinforced ConcreteS. Eswari, P.N. Raghunath, K. SugunaThis study presents a study on the ductility performance of hybrid fibre reinforced concrete. The influence of fibre content on the ductility performance of hybrid fibre reinforced concrete specimens having different fibre volume fractions was investigated. The parameters of investigation included modulus of rupture, ultimate load, service load, ultimate and service load deflection, crack width, energy ductility and deflection ductility. … …American Journal of Applied Sciences, Vol. 5, Issue 9 · 30 Sep 2008 · 7,290 accessesView PDFCite
Research ArticleOpen accessIn the abstractRounding Theorem the Possibility of Applying the Cryptosystems on the Decimal NumbersRand Alfaris, Muhamad Rezal Kamel Ariffin, Mohamed Rushdan Md SaidThe possibility of using the decimal numbers in cryptography as the base of the encryption and decryption is proposed by introducing the "Rounding Theorem". Until now, cryptosystems are used the integer numbers to avoid the fractions of the decimal numbers. That is to avoid losing the original plaintext after the decryption. This theorem is proved that there is no lost … …Journal of Mathematics and Statistics, Vol. 4, Issue 1 · 31 Mar 2008 · 7,204 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffect of Fig (Ficus carica) Leaf Extract on the Secretion and Content of Cholesterol in Hepg2 CellAhmad Fatemi, Ali Rasouli, Farzad AsadiTraditional medicines remain a source of potential for discovering of new compounds with valuable pharmacological activities. Leaves of Ficus carica were dried, powdered and extracted using methanol (ME).An aliquot of ME was dried and re-extracted by water:chloroform and the other aliquot by water: peteruleum ether. Effect of aqueous fractions of the former (ACR; 0.08, 0.1 and 0.13 mg dL-1), the … …American Journal of Animal and Veterinary Sciences, Vol. 2, Issue 4 · 31 Dec 2007 · 7,420 accessesView PDFCite