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Advances in Applied mathematics and mechanics 2010年第1期2卷 86-106页

作者： m.zakaria Department of mathematics Faculty of ScienceAl-Baha UniversityP.O.Box 1988 Al-Baha Kingdom of Saudi Arabia

The objectives of the present study are to investigate the effects of heat and mass transfer on the unsteady flow of a perfect conducting polar fluid over a flat sheet with a linear velocity in the presence of thermal *** approximation method developed in zakaria[***.10(2002),***.155(2005)]is adopted to solve the *** effects of Alfven velocity,mass transfer,various material parameters,Prandtl number,Schmidt number and relaxation time on the velocity,angular velocity,temperature and concentration are discussed and illustrated graphically.

关键词： Heat and mass transfer relaxation time perfectly conducting polar fluid

Climatic variables: Evaporation, sunshine, relative humidity, soil and air temperature and its adverse effects on cotton production

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Information Processing in Agriculture 2018年第1期5卷 134-148页

作者： zakaria m.Sawan Cotton Research Institute Agricultural Research CenterMinistry of Agriculture&Land Reclamation9 Gamaa Street12619 GizaEgypt

Cotton yield is a function of growth rates,flower production rates,and flower and boll retention during the fruiting *** on the relationship between climatic factors and the cotton plant’s ability to produce and sustain flower buds,flowers,and bolls will allow one to model plant responses to conditions that frequently occur in the field and to predict developmental rate or the formation of these *** study investigates the statistical relationship between various climatic factors and overall flower and boll ***,the relationship between climatic factors and production of flowers and bolls obtained during the development periods of the flowering and boll ***,predicting effects of climatic factors during different convenient intervals(in days)on cotton flower and boll production compared with daily ***,sunshine duration,relative humidity,surface soil temperature at 1800 h,and maximum air temperature,are the important climatic factors that significantly affect flower and boll *** five-day interval was found to be more adequately and sensibly related to yield ***;minimum humidity and sunshine duration were the most effective climatic factors during preceding and succeeding periods on boll production and *** was a negative correlation between flower and boll production and either evaporation or sunshine duration,while that correlation with minimum relative humidity was positive.

关键词： Cotton flower and boll production Evaporation Relative humidity Sunshine duration Temperature

Boundedness of the Anisotropic maximal and Anisotropic Singular Integral Operators in Generalized morrey Spaces

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Acta mathematica Sinica,English Series 2011年第12期27卷 2361-2370页

作者： Vagif S. GULIYEV rza Ch. mUSTAFAYEV Department of mathematics Ahi Evran University Kirsehir 40200 Turkey Institute of mathematics and mechanics ANAS Baku AZl141 Azerbaijan

In this paper we give the conditions on the pair （~1, W2） which ensures the boundedness of the anisotropic maximal operator and anisotropic singular integral operators from one generalized morrey space mp,w1 to anot... 详细信息

关键词： Generalized morrey spaces anisotropic maximal operator Hardy operator anisotropic singular integral operator

Application of Biochars for Soil Constraints:Challenges and Solutions

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Pedosphere 2015年第5期25卷 631-638页

作者： zakaria m.SOLAImAN Hossain m.ANAWAR Soil Biology and molecular Ecology Group School of Earth and Environment (M087) and UWA Institute of AgricultureThe University of Western Australia School of Earth and Environment (m087) and UWA Institute of Agriculture The University of Western Australia

Biochar addition to soil is currently being considered as a means to sequester carbon while simultaneously improving soil health,soil fertility and agronomic benefits. The focus of this special issue is on current research on the effects of biochar application to soil for overcoming diverse soil constraints and recommending further research relating to biochar application to soil. The biochar research has progressed considerably with important key findings on agronomic benefits, carbon sequestration, greenhouse gas emissions, soil acidity, soil fertility, soil health, soil salinity, etc., but more research is required before definitive recommendations can be made to end-users regarding the effects of biochar application across a range of soils, climates and land management practices.

关键词： agronomic benefits carbon sequestration greenhouse gas emissions pH soil fertility soil health soil salinity

Biochar:An Emerging Panacea for Remediation of Soil Contaminants from mining,Industry and Sewage Wastes

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Pedosphere 2015年第5期25卷 654-665页

作者： Hossain m.ANAWAR Farjana AKTER zakaria m.SOLAImAN Vladimir STREZOV School of Earth and Environment (m087) and UWA Institute of Agriculture The University of Western Australia Sher-e-Bangla Agricultural University Department of Environmental Sciences Faculty of Science and EngineeringMacquarie University

mine tailings, waste rock piles, acid mine drainage, industrial wastewater, and sewage sludge have contaminated a vast area of cultivable and fallow lands, with a consequence of deterioration of soil and water quality and watercourses due to the erosion of contaminated soils for absence of vegetative cover. High concentrations of toxic elements, organic contaminants, acidic soils, and harsh climatic conditions have made it difficult to re-establish vegetation and produce crops there. Recently, a significant body of work has focussed on the suitability and potentiality of biochar as a soil remediation tool that increases seed emergence, soil and crop productivity, above ground biomass, and vegetation cover on mine tailings, waste rock piles, and industrial and sewage waste- contaminated soils by increasing soil nutrients and water-holding capacity, amelioration of soil acidity, and stimulation of microbial diversity and functions. This review addresses： i） the functional properties of biochar, and microbial cycling of nutrients in soil; ii） bioremediation, especially phytoremediation of mine railings, industrial waste, sewage sludge, and contaminated soil using biochar; iii） impact of biochar on reduction of acid production, acid mine drainage treatment, and geochemical dynamics in mine railings; and iv） treatment of metal and organic contaminants in soils using biochar, and restoration of degraded land.

关键词： acid mine drainage contaminated soil interaction mine railings mining waste phytoremediation phytostabilization revegetation

A growth model for a hyalid amphipod Hyale perieri in the coastal water of Alexandria(Egypt)

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Acta Oceanologica Sinica 2003年第2期22卷 221-232页

作者： zakaria H.Y Dowidar N.m. El-Komi m.m. Atta m.m. National Institute of Oceanography and Fisheries AlexandriaEgypt.Department of OceanographyFaculty of ScienceAlexandria UniversityEgyptNational Institute of Oceanography and FisheriesAlexandriaEgypt.Department of OceanographyFaculty of ScienceAlexandria UniversityEgypt

The growth rate of the hyalid amphipod Hyale perieri was studied on the bases of Ikeda'sgrowth model which is based on the inter moult period (IP) and moult increament (△BL). To apply this approach, laboratory experiments were carried out at three temperatures regimes (15℃, 20℃, 25℃ ) to gain accurate data of IP and BL. The total number of specimens used in this study was 86 at 15℃ , 24 at 20℃ and 70 at 25℃. The number of flagellar segments of both antennae of the Hyale perieri could not be used as an index of growth (instar criterion). The obtained results indicated that, the predicted IP of the specimens was inversely related to temperature and in good agreement with the observed values at the experimental temperatures. IP data obtained from laboratory-reared specimes are combined with ABL data to establish a growth model for Hyale perieri from its release from the mar-supium (1.64 mm BL ) to the maximum size (12.67 mm BL) as a function of temperature. The maximum numbers of consecutive moults recorded during the experiment were 13 moults (14 instar) at 15℃, 14 moults (15 instar) at 20℃ and 12 moults (13 instar) at 25℃ . The predicted life span for BL = 12.67 mm (moult 13) was 203.82 d at 15t, for BL = 11.75 mm (moult 14) was 138.94 d at 20℃ and for BL = 8.65 mm (moult 12) was 75.40 d at 25℃ respectively, thus confirming that the life span of the species is inversely proportional to temperature. Within the experimental temperatures tested, the optimum temperature for the growth of the species was 20℃.

关键词： growth model inter moult period and moult increament hyalid amphipod Hyale perieri coastal water of Alexandria

Spectral Element Discretization of the Stokes Equations in Deformed Axisymmetric Geometries

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Advances in Applied mathematics and mechanics 2011年第4期3卷 448-469页

作者： zakaria Belhachmi Andreas Karageorghis Laboratoire de mathematiques Informatique et ApplicationsEA CNRSUniversite de Haute AlsaceRue des Freres Lumieres68096 MulhouseFrance Department of mathematics and Statistics University of CyprusP.O.Box 205371678 NicosiaCyprus

In this paper,we study the numerical solution of the Stokes system in deformed axisymmetric *** the azimuthal direction the discretization is carried out by using truncated Fourier series,thus reducing the dimension of the *** resulting two-dimensional problems are discretized using the spectral element method which is based on the variational formulation in primitive *** meridian domain is subdivided into elements,in each of which the solution is approximated by truncated polynomial *** results of numerical experiments for several geometries are presented.

关键词： Spectral element method Stokes equations variational formulation deformed geometries Fourier expansion

Effects of human disturbance on liana community diversity and structure in a tropical rainforest, malaysia: implication for conservation

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Journal of Plant Ecology 2012年第4期5卷 391-399页

作者： Patrick Addo-Fordjour zakaria B.Rahmad A.m.S.Shahrul School of Biological Sciences Universiti Sains MalaysiaPenangMalaysia

Aim Due to the important role of lianas in the functioning of forest ecosystem,knowledge of the factors that affect them are important in the management of ***,there are conflicting reports on the response of liana communities to disturbance,calling for more research in the *** present study was carried out to investigate the response of liana diversity and structure to human disturbance within two major forests in the Penang National Park,*** study also looked at the implication of the findings for *** A total of 15 40×40-m^(2)(or 40-m×40-m)plots each were randomly located across a range of habitats in a primary forest and disturbed secondary *** with diameter at breast height≥10 cm were examined for lianas with diameter≥2 *** lianas and trees were enumerated and compared between the two *** and structural variables of lianas were compared between the two forests using the t-test *** abundance was also compared between the two forests with t-test,while linear regression analysis was run to determine the effects of tree abundance on liana *** Findings A total of 46 liana species belonging to 27 genera and 15 families were identified in the *** disturbance significantly reduced liana species richness and species diversity in the secondary *** abundance remained the same in both forests whereas liana basal area was;7 times higher in the primary *** and hook climbers were significantly more abundant in the primary and secondary forest,*** diameter lianas were more abundant in the primary forest compared with the secondary *** diameter distribution of most families in the primary forest followed the inverted J-shaped curve whereas only a few of the families in the secondary forest did *** abundance was significantly higher in the primary *** abundance of lianas significantly depended on tree abundance in all the f

关键词： climbing mechanism conservation liana diversity and structure human disturbance

Effect of impeller design on homogeneity, size and strength of pharmaceutical granules produced by high-shear wet granulation

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Particuology 2015年第6期13卷 31-39页

作者： zakaria m.rza Jiangtao Liu Yoann Glocheux Ahmad B. Albadarin Gavin m. Walker Chirangano mangwandi School of Chemistry and Chemical Engineering Queen's University Belfast Belfast BT9 SAG Northern Ireland UK Synthesis & Solid State Pharmaceuticals Center (SSPC) Department of Chemical and Environmental Science. University of Limerick Ireland

Small mixer impeller design is not tailored for granulation because impellers are intended for a wide range of processes. The aim of this research was to evaluate the performances of several impellers to provide guidance on the selection and design for the purposes of granulation. Lactose granules were produced using wet granulation with water as a binder. A Kenwood Km070 mixer was used as a standard apparatus and five impeller designs with different shapes and surface areas were used. The efficacy of granulate for- mation was measured by adding an optically sensitive tracer to determine variations in active ingredient content across random samples of granules from the same size classes. It was found that impeller design influenced the homogeneity of the granules and therefore can affect final product performance. The vari- ation in active ingredient content across granules of differing size was also investigated. The results show that small granules were more potent than larger granules,

关键词： Granule strength Impeller design Homogeneity High-shear granulation Lactose monohydrate

Humus-Rich Compost Increases Lettuce Growth, Nutrient Uptake, mycorrhizal Colonisation, and Soil Fertility

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Pedosphere 2019年第2期29卷 170-179页

作者： zakaria m.SOLAImAN Hongjun YANG Deb ARCHDEACON Orna TIPPETT michaela TIBI Andrew S.WHITELEY SoilsWest UWA School of Agriculture and Environment and the UWA Institute of Agriculture Faculty of Science The University of Western Australia College of Resources and Environment Southwest University C-Wise

Sandy soils, typical of Australia's west, either have little or no habitat protection for microbes including arbuscular mycorrhizal(Am) fungi, which are essential for nutrient cycling. To minimize this problem, the application of organic matter, such as humus-rich composts, is necessary during vegetable crop production. This study aimed at determining the effects of humus-rich composts on either indigenous or inoculated Am fungal colonisation in roots, lettuce(Lactuca sativa L. var. Quechua) growth, and soil fertility improvement. Four different humus-rich composts with varying humus contents were applied at the same standard rate to lettuce grown under glasshouse conditions for 10 weeks after sowing and compared with two low-humus composts and non-amended soil(control). Humus-rich composts significantly increased lettuce shoot growth, root growth, and Am fungal colonisation in roots. Humus contents in the composts were also correlated with lettuce shoot and root growth. Soil dissolved organic carbon, microbial biomass carbon, and fertility were increased with the application of humus-rich composts. These humus-rich composts, especially the compost of higher humic acid with and without Am inoculation, might have a significant role in sustainable vegetable production, for example lettuce growth. Overall, the results indicate that supplementation with humus-rich compost is highly beneficial to enhance soil fertility and potentially maintain the sustainability of vegetable production.

关键词： arbuscular mycorrhizal fungi humus nitrogen phosphorus vegetable production