Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 749 )

2018 ( 1100 )

2017 ( 1075 )

2016 ( 1406 )

Custom range...

Search Results: 1 - 10 of 583502 matches for " T.H.M.;Oliveira "
All listed articles are free for downloading (OA Articles)
Page 1 /583502
Display every page Item
Viabilidade do tratamento do soro de queijo com digest?o anaeróbia
Lacerda, T.H.M.;Oliveira, A.J.de;Caruso, J.G.B.;
Anais da Escola Superior de Agricultura Luiz de Queiroz , 1990, DOI: 10.1590/S0071-12761990000200016
Abstract: the main objetive of this work was to evaluate the anaerobic digestion of cheese whey (68.000mg cod/l), without whey ph adjustment, incomplete mixture semi-continuous laboratory reactors with temperature maintained at 35° ± 1°c. cattle manure with 8% total solids was used for seeding the reactors. the experiment was carried out for a period of 100 days. the first 20 days were characterized for the aclimatization of seed manure and four 20 days periods as hydraulic retention times (?). a loading of 3,0g cod/l digester/day was fed to each digestor. in the 1rst ? the loading was divided in three portions and fed to the reactors at intervals of 8 hours. in the 2nd the loading was divided in two portions and fed to the reactors at intervals of 12h; in the 3th ? a 6h interval of feeding was used, and the loading divided in four portions; the 4th ? was characterized by feeding the total loading to the reactor at once. the experiment was controled by the following analysis: volatile acidity, alkalinity, ph, volume of biogas produced and chemical oxigen demand (cod). the results obtained show an effect of the feeding system on the process of anaerobic digestion of whey. the increase in volatile organic acid production at the retention times studied caused a change in the equilibrium of the microbial population and consequently lowered the efficiency of the process. under these condition biogas production expressed as 1.gas/g of cod used was 0.35 l/g.
E. Sengers, The Dutch and their Gods. Secularization and Transformation of Religion in the Netherlands since 1950
T.H.M. van Schaik
BMGN : Low Countries Historical Review , 2009,
J.A. de Kok, Acht eeuwen minderbroeders in Nederland. Een ori ntatie
T.H.M. van Schaik
BMGN : Low Countries Historical Review , 2009,
Protective Effect of Ascorbic Acid on Molecular Behavior Changes of Hemoglobin Induced by Magnetic Field Induced by Magnetic Field
Nahed S. Hassan,T.H.M. Abou Aiad
Journal of Applied Sciences , 2007,
Abstract: With the use of electricity and industrialization of societies, humans are commonly exposed to static magnetic field induced by electric currents. The putative mechanisms by which Static Magnetic Field (SMF) may affect biological systems is that of increasing free radical life span in organisms. To test this hypothesis, we investigate the effect of ascorbic acid (Vitamin C) treatment on the changes in the molecular behavior of hemoglobin as a result of exposure of the animals to magnetic field in the occupation levels. By measuring the relative permittivity, dielectric loss, relaxation time, conductivity, radius and diffusion coefficient of aqueous solutions of hemoglobin. These measurements were calculated in the frequency range of (100 Hz-100 kHz) to give more information about molecular behavior. Twenty four male albino rats were equally divided into four groups 1, 2, 3 and 4. Animals of group 1, were used as control, animals of group 2, were exposed to (0.2T) magnetic field and that of group 3, 4, were treated with Ascorbic Acid by two doses group 3 (20 mg kg-1 body weight), group 4 (50 mg kg-1 body weight) orally half hour before exposure to magnetic field. The sub chronic exposure expanded (1 h day-1) for 30 consecutive days. The results indicated that exposure of animals to magnetic field resulted in changes in the molecular behavior of hemoglobin molecule while treatment with ascorbic acid afforded comparatively more significant amelioration in these molecular changes, via decreasing the radical pair interaction of magnetic field with biological molecules.
An Extension of Multi-Response Optimization in MADM View
M. Bashiri,T.H. Hejazi
Journal of Applied Sciences , 2009,
Abstract: Multiple Response Surface (MRS) is the useful way to satisfy more than one output characteristic. It’s originated from statistical approach to estimate relations between inputs and output variable called Response Surface Methodology (RSM). This study reviews important Multi-Response Optimization (MRO) methods and uses Multiple Attribute Decision Making (MADM) methods such as VIKOR, PROMETHEE II, ELECTRE III and TOPSIS in converting multi-response to single response in order to analyze the robust experimental design. Finally, numerical results and comparison of MADM methods are shown.
An Integrated Approach to Control Anthracnose of Guava (Psidium guajava)
T.H. Ansari,T. Yoshida,M.B Meah
Pakistan Journal of Biological Sciences , 2000,
Abstract: The experiments were conducted to explore the possibility of integration of various approaches for control of guava anthracnose during fruiting seasons, 1992-93. The organic manures cowdung @ 10 kg/tree, Mustard oil cake (MOC) (ghani), MOC (mill), Sesame oil cake (SOC) @ 2 kg/tree and fertilizers urea, Tripple Super Phosphate (TSP), Muriate of Potash (MP), ZnSO4, Gypsum @ 0.3, 0.3, 0.35, 0.005 and 0.01 kg/tree respectively were applied separately and in six combinations. In another experiment tilt, rovral, Mn, B and Zn @ 1000, 500 and 2000 ppm respectively were sprayed separately for three times at 15 days interval starting from early fruit stage. All the sprayed plants received a recommended basal dose of NPK before start of spraying schedule. Disease severity (% fruit infection and % fruit area diseased) was recorded at 15 days interval for continuous 4 times starting 15 days after treatment. No disease developed for the treatment of cowdung, MOC (mill), MP, ZnSO4, Cowdung+MOC (mill), K+ZnSO4, NPK+tilt spray and NPK+Zn spray. Very slight infections were observed for rovral spray (0.08%), Mn spray (0.08%), NPK+ZnSO4+gypsum (0.18%), PK+ZnSO4 and MOC (ghani) (1.8%). TSP, cowdung+MOC (ghani) were less effective but urea, gypsum, cowdung+SOC, and SOC were ineffective. Results were very promising from the point of environmentally friendly control of guava fruit anthracnose.
Effect of Various Levels of Microbial Culture (EM4) on Nutrient Digestibility and Performance of Male Broilers
S. Mahmood,I. Hussain,M. Sarwar,T.H. Shah
Pakistan Journal of Biological Sciences , 1998,
Abstract: The effect of various levels of microbial culture (EM4) on nutrient digestibility and performance was studied in 120 male broilers. The birds using water supplemented with EM4 gained more weight and used their feed more efficiently than those of control group. However, feed consumption remained unaffected. The highest weight gain and the best feed efficiency was observed in the broilers using the lowest amount of EM4 in the water. The mean values being 1370, 1524, 1563 and 1569 g for weight gain and 3.0, 2.68, 2.65, and 2.55 for feed efficiency (g feed/g gain ) in groups A, B, C and D, respectively. Use of EM4 did not show any effect on dressing percentage and on the relative weight ( g/100g body weight ) of liver, heart, pancreas and gizzard indicating no anatomical changes in the internal organs. Digestibility of dry matter, crude protein and crude fibre contents of the rations also remained unaffected.
Goose barnacle (Lepas australis) infestation of the Subantarctic fur seal (Arctocephalus tropicalis)
T.H. Setsaas,M.N. Bester
African Zoology , 2011,
Abstract: Goose barnacle infestations (Lepas australis) were found on the pelage of two female Subantarctic fur seals (Arctocephalus tropicalis) at Gough Island in the South Atlantic. The infested females were both relatively old at 11 and 15 years of age. We suggest that females might be more prone to infestation than males and that infestation is more common in the older age groups. One of the females was postreproductive and the other had lost its pup of the season, consequently they might have stayed longer at sea after settlement of the goose barnacles and prior to hauling out, than females with pups. Attached to the guard hairs of the seal, the barnacles were clogged with underfur fibres, making it impossible for them to feed, leading to emaciation. A possible explanation for the clogging is that the seals had begun to moult.
Speculations on colonizing success of the African clawed frog, Xenopus laevis (Pipidae), in California
M.J. McCoid,T.H. Fritts
African Zoology , 2012,
Abstract: ENGLISH ABSTRACT: The African clawed frog has been established in California for over twenty years. During that period, populations have spread to most of the drainage systems in southern California. It is suggested that a suite of contributing factors, including morphological, behavioural, and biochemical predator avoidance strategies, and reproductive and feeding (cannibalism) strategies, have aided in the success of this species in an extralimital situation. ********* AFRIKAANSE OPSOMMING: Die gewone platanna is reeds langer as twintig jaar in Kaliforni gevestig. Gedurende hierdie tydperk het bevolking sversprei nameeste van die dreineringsstelsels in suidelike Kalifornie. Daar word voorgestel dat 'n reeks faktore, wat roofdierontwykingsstrategie in terme van morfologie, gedrag en biochemie, sowel as voortplantings- en voedingstrategiee (kannibalisme) insluit, bygedra het tot die sukses van hierdie spesie in 'n ekstralimitale situasie.
Crystal quality and electrical properties of p-type GaN thin film on Si(111) substrate by metal-organic chemical vapor deposition MOCVD
G.M. Wu,T.H. Hsieh
Journal of Achievements in Materials and Manufacturing Engineering , 2007,
Abstract: Purpose: In this paper, p-GaN samples have been grown on silicon substrates under various processing conditions. The effects of growth tenperature and thermal annealing on the crystal quality and strain were carefully investigated. The electrical properties such as hole concentration and mobility would be discussed.Design/methodology/approach: GaN-based III–V semiconductors have become promising materials for short-wavelength optoelectronic devices because of their large and direct band gap energies. In this paper, p-GaN has been grown by metal-organic chemical vapor deposition (MOCVD) at 900°C, 950°C, 1000°C, and 1050°C with low temperature LT-deposited AlN/AlGaN buffer layer.Findings: The mobility was achieved at 150 cm2/Vs and the hole concentration was 8x1017 cm-3. SIMS and XRD were used to measure and explain the relationships between hole concentration and the growth temperature. When the growth temperature was increased to 1000°C, the hole concentration was increased by ten times. According to the experimental results, the optimal growth temperature was 1000°C. After the thermal annealing process at temperature 850°C for 2 minutes, the FWHM of p-GaN was lowered to 617 arcsec. The effects of growth temperature were explained in the two temperature regions. From 900°C to 1000°C, the incorporation rate of Mg was slightly increased and the strain decreased with the growth temperature. Mg would provide holes and the lower strain would result in better crystal quality. The crystal quality and Mg concentration effects on hole concentration below 1000°C was thus beneficiary. On the other hand, when the growth temperature was further increased, the strain and FWHM increased while hole concentration decreased at 1050°C. At this high temperature, Si might become donor in GaN.Research limitations/implications: It was suggested that the hole concentration reduced at 1050°C due to the Si diffusion and the strain caused by Mg dopant. According to the experimental data, the optimal growth temperature was 1000°C. After the annealing process, the FWHM of p-GaN was lowered to 617 arcsec.Originality/value: Determination of crystal quality and electrical properties of p-type GaN thin film on Si(111) substrate by metal-organic chemical vapor deposition MOCVD.
Page 1 /583502
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.