reaction of phenol and formaldehyde under basic conditions
Handbook of Polymer Synthesis Second Edition Episode 15 pdf
... color and researchers were able even to isolate quinone methides formed in pyrolysis reactions [26] C Reaction of Phenol and Formaldehyde Under Acidic Conditions The reaction between phenol and formaldehyde ... of two moles of dimethylolamine DMA, one mole of formaldehyde and two moles of ammonia Water is ubiquitious in novolacs and therefore under basic reaction conditions in the presence of tert and ... thermal insulation and bonded organic fiber patting, foundry sand bonding, wood waste bonding, and other miscellaneous applications A Reaction of Phenol and Formaldehyde Under Basic Conditions The...
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DMF Decomposition and Nitrogen Removal Performance by a Mesh-Filtration Bioreactor under Acidic Conditions
... 6.5), and resuspended in 50 mM MOPS buffer The reaction mixture containing 870 μL of sludge, 120 μL of 50 mM CTC, and 10 μL of the substrate mixture (0.05% for peptone and yeast extract and mM ... 5, and For measurement of the nitrification rate, NH4Cl was used as the substrate For measurement of the denitrification rate, NaNO3 and methanol were used as substrates, and the weight ratio of ... denitrification ratio, and the limited denitrification may have been caused by an insufficiency in the amount of hydrogen donor owing to the low C/N ratio of the DMF and the acidic condition of the reaction...
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simple and rapid synthesis of a-fe2o3 nanowires under ambient conditions
... 2: 373 379 growth of the NWs Figure shows our understanding of the NW formation conditions and a suggested mechanism for their growth on the basis of our experimental results and literature data ... into one-dimensional structures of metal oxides in particular and NWs in general, our understanding of the mechanisms of their formation and growth is still incomplete Our method affords the possibility ... resistive heating of iron wire (99.99% and 99.5%, Goodfellow) with a diameter of 0.25 mm under ambient laboratory conditions The growth was carried out by applying a potential difference of 2.7 7.8...
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báo cáo hóa học:" Global exponential synchronization of delayed BAM neural networks with reaction-diffusion terms and the Neumann boundary conditions" docx
... consisting of a small number of cells, NNs usually have a spatial extent due to the presence of a multitude of parallel pathways with a variety of axon sizes and lengths Thus, there is a distribution of ... ≥ , and m % ∑ u ( t, x ) − u ( t, x ) i i r dx , i =1 (u (t, x ) , v (t, x )) and j =1 are the solutions of drive-response systems (1) and (4) satisfying boundary conditions and initial conditions ... exponential synchronization of delayed BAM neural networks with reaction diffusion terms and the Neumann boundary conditions WeiYuan Zhang*1,2 and JunMin Li1 School of Science, Xidian University,...
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Báo cáo lâm nghiệp: " Growth and mineral content of young chestnut trees under controlled conditions of nutrition" ppsx
... supplied (C and D) in September1994 And a decreasing trend of K concentrations occurred under O and A between January and September 1995 and under C and D between September 1994 and September ... 600 °C in 14 mL of a 2:6:6 (v/v/v) mixture of H HNO and H according O , SO 23 Concento Hoenig and Vanderstappen trations of Ca, Mg and Mn were determined by atomic absorption and K contents by ... C, D and O A consisted of a single supply of quick-lime /kg 2+ Ca of soil, corresponding to -1 kg.ha (94.0% CaO) for forest fertiliza- (2 cmolc of 000 tion); B consisted of a single supply of Ca...
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Photodegradation and removal of phenol and phenolic derivatives from petroleum refinery wastewater using nanoparticles of TiO2
... experimental set up of the photoreactor for the treatment of phenol and phenolic derivatives in petroleum refinery wastewater _ + Figure Experimental set up of photoreactor for the treatment of phenolic ... degradation of phenol using mixed liquors of Pseudomonas putida and activated sludge.Waste Manage 2002, 22, 703–710 [8] Mohan D., Chander S Single component and multi-component adsorption of phenols ... CO2 and H2O under moderate conditions Research efforts in photocatalysis have dramatically expanded since the discovery of the photocatalytic properties of TiO2 and the demonstration of its effectiveness...
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Dynamic performance of bridges and vehicles under strong wind
Công trình giao thông, thủy lợi
... encouragement and support Thanks are also extended to my other committee members: Professor Dimitris E Nikitopoulos of Mechanical Engineering, Professor Jannette Frandsen of Civil Engineering, and Professor ... Caribbean and typhoons in the South China Sea and off the northwest coast of Australia (Holmes, 2001) Thunderstorm: Thunderstorms are capable of generating severe winds, through tornadoes and downbursts ... a span length of 3,300 m is under design and Gibraltar Straits Crossing with a span length of 5,000 m is under discussion Lighter and more aerodynamically profiled cross sections of decks are...
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Báo cáo khoa học: The complex of the insect LDL receptor homolog, lipophorin receptor, LpR, and its lipoprotein ligand does not dissociate under endosomal conditions pot
... N-terminal LA repeats of LDLR and LA-8 of LpR, the number of cells that bound ligand was only 58.7 ± 4.2% of the number of cells that bound antibody This suggests a reduction in affinity of the hybrid ... stability of the complex at low pH and upon EDTA treatment is caused by the interaction between HDLp and LA-1–7 of LpR The general binding mode of LDLR family members and their ligands consists of an ... hinge region of LDLR The presence of two Gly residues in LpR at the corresponding positions of His264 and Ser265 of LDLR (Table 1) might decrease the rigidity of the hinge region of LpR(1–342)LDLR(293–839),...
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Báo cáo khoa học: Structural studies of the capsular polysaccharide and lipopolysaccharide O-antigen of Aeromonas salmonicida strain 80204-1 produced under in vitro and in vivo growth conditions docx
... aqueous- and phenol- phase soluble LPS by ultracentrifugation Crude CPS was recovered from the initial 2.5% saline wash of bacterial cells and from 1% saline wash of the aqueous- and phenol- phase ... Following completion of the reaction a M solution of sodium borohydride (12.5 mL) was added slowly and the reaction mixture was maintained at pH by titration with M HCl The reaction was allowed ... 1% (w/v) phenol solution (4 h, 22 °C) and harvested by centrifugation (yield 25 g, wet weight) Isolation and purification of CPS and LPS The cells were washed with 2.5% saline (w/v) and extracted...
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assessment of the stress and strain levels at geometrical discontinuities under elastoplastic conditions a case study
... steps of 50 MPa and observed the levels of stress and strain in the root of the notch as well as the correspondent stress and strain concentration factors Triangular 2D element node; DOF / node ... in reason of the magnitude of its hardening exponent and strength coefficient On the other hand, the decrease of the stress concentration factor Kσ after yielding and the increase of the strain ... parts and 2”, J of Engineering Materials and Technology, Transaction of the ASME, Vol 107, pp 250260 Howland, R C J., 1930, “On the Stresses in the Neighbourhood of a Circular Hole in a Strip Under...
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Báo cáo lâm nghiệp: "Variation of the tree form factor and taper in European larch of Polish provenances tested under conditions of the Beskid Sądecki mountain range (southern Poland)" docx
... variability of Abies grandis stem form under mountain conditions of Beskid Sądecki (southern Poland) Canadian Journal of Forest Research, 35: 1–14 StatSoft, Inc 2004 STATISTICA, version www.statsoft ... stem form of mountain and lowland Fagus sylvatica (Dudzińska 2003), as well as studies concerning Picea abies stands which showed differences between mountain and lowland stands in respect of the ... regions differed in respect of the range of variation of relative diameters d0.05 at individual heights of the stem However, on the basis of a direct comparison of the trait under analysis it was observed...
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Báo cáo lâm nghiệp: "The angular distribution of diffuse photosynthetically active radiation under different sky conditions in the open and within deciduous and conifer forest stands of Quebec and British Columbia, Canada" pptx
... angular distribution of PAR under different sky conditions and periods of the day Results of this study are useful for refining PAR models and determining the potential impact of the different angular ... The Quebec stands were all located on clay soils Forest stands on Vancouver Island were located in a 89year-old Douglas-fir stand and a 45-year-old red alder stand The Douglas-fir stand was located ... when compared to the aspen and jack pine stands On Vancouver Island, overcast and clear sky RLRsensor were generally higher in Douglas fir stands between 90° and 70º, and lower below those elevations...
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Báo cáo lâm nghiệp:"Optimisation of inoculation of Leucaena leucocephala and Acacia mangium with rhizobium under greenhouse conditions" docx
... Effect of the size of the inoculum on nodulation and the production of biomass by seedlings of L leucocephala The level of infection of the strains was variable and depended on the size of the ... 0.05) Table III Effect of the size of the rhizobial inoculum on nodulation (number of nodules and dry weight of nodules) and the growth (shoot and root dry weight) of plants of L leucocephala cultivated ... the number and dry biomass of the nodules formed, the dry weights and the percentage of total nitrogen in shoots 2.4.3 The effect of the type of inoculation The effect of the type of inoculation...
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Báo cáo lâm nghiệp: "Argan (Argania spinosa (L.) Skeels) seed germination under nursery conditions: Effect of cold storage, gibberellic acid and mother-tree genotype" docx
... Analyses of variance of emerged seedling number (ES), time to germination (TG), germination period (GP), pre-emergence dumpedoff seedling number (GC), number of deteriorated seeds (RS) and dormant ... preemergence dumped-off seedling number (GC) and number deteriorated seeds (RS) and dormant seeds (DS) for four cold storage duration and two gibberellic acid treatments (GA) Values are means of two replications ... germination and seed deterioration but none of its interaction was significant (Tab I) Therefore, cold storage and GA treatment are indifferent to genotype DISCUSSION AND CONCLUSION 4.1 Cold storage and...
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Báo cáo lâm nghiệp: "Environmental control of CO assimilation rates 2 and stomatal conductance in five oak species growing under field conditions in Greece" ppsx
... during of the measured period Lowest values of Ψ consistently recorded in Q pedunculiflora Values of Ψ at the beginning and end of the study period were high (between -0.5 and -1.0 MPa) and ... belongs to soil brun Mediterranean type and consists of sand and clay with pH(H O) 7.7 in the surface layer and 8.0 in deeper layers The texture varies between clay and loam Leaf water status Leaf (xylem) ... The knowledge of how environmental conditions influence gas exchange may improve the understanding of oak species habitat within the Mediterranean forest complex There is a lack of knowledge about...
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Báo cáo khoa học: "Gas exchange and water relations of 3 sizes of containerized Picea mariana seedlings subjected to atmospheric and edaphic water stress under controlled conditions" pps
... both under controlled conditions (Wang and Macdonald, 1993; Yue and Margolis, 1993) and in the field (Blake and Sutton, 1988; Macdonald and Lieffers, 1990) The treatments also created a range of ... effect of treatment conditions at or near equilibrium, the effects of treatments were evaluated by performing an analysis of variance on the data obtained on days and of treatment only Of the ... that of g (fig 2) sW The effect of seedling size varied both with PEG levels and environment The largest seedlings showed the largest rates of net photosynthesis by unit needle dry weight under conditions...
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Báo cáo khoa học: "Survival of Clostridium perfringens During Simulated Transport and Stability of Some Plasmid-borne Toxin Genes under Aerobic Conditions" pptx
... cpb1, cpb2 and etx are stable under normal laboratory conditions and under conditions normally used during transportation Acta vet scand vol 46 no 4, 2005 Acknowledgements We thank Anders Gunnarsson ... the stability of plasmid-borne genes (cpb1, cpb2 and etx) was assessed after exposure of C perfringens strains to atmospheric oxygen Material and Methods Bacterial strains and growth conditions ... Bury, Lancashire, England) with 10% defibrinated horse blood and incubated anaerobically over night at 37°C Survival of C perfringens and stability of the plasmid-borne genes cpb1 and etx after simulated...
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Báo cáo khoa học: "Metabolic and endocrine profiles and reproductive parameters in dairy cows under grazing conditions: effect of polymorphisms in somatotropic axis genes" doc
... 12 kg dry matter (DM) of corn silage, kg DM of highmoisture corn grain, and kg DM sunflower meal The diet offered had 17% crude protein and 1.7 Mcal/kg DM of net energy of lactation (NRC, 2001) ... pasture and received 11 kg DM/cow/day of a diet composed of kg DM of sorghum silage, kg DM of sorghum grain, kg DM of sunflower meal (36% crude protein) and 100 g of urea After calving, cows received ... DM/cow/day The diet offered had 17% crude protein and 1.5 Mcal/kg DM of net energy of lactation (NRC, 2001) Cows were milked twice daily and milk yield and composition (fat and protein) were measured...
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Báo cáo y học: " Validation of an ambulatory cough detection and counting application using voluntary cough under different conditions" potx
... Syndrome, and others suffer from a multitude of pathologies of airways and are often inflicted with debilitating chronic cough Treatment of cough in these patients consists of many types of expectorants, ... coefficient were calculated, and a Bland-Altman plot was calculated, with 95% limits of agreement We also calculated and correlated the number of "cough seconds" [13] - The number of seconds per minute ... detect The overall SENS for detection of cough events for the entire database was 0.96 with SPEC of 0.94 and PPV of 0.90 Table shows the SENS, SPEC, and PPV of cough events detection for the individual...
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