Durability of concrete exposed to leaching and external sulphate attacks E. Rozière, A. Loukili⁎, R. El Hachem, F. Grondin Research Institute of Civil Engineering and Mechanics (GeM), UMR-CNRS 6183, Ecole Centrale de Nantes, France Keywords: C. Durability
In 2011, Aggarwal et al. studied the influence of the electron withdrawing substituent carried by a nitrogen nucleophile on the reaction pathway, specifically comparing sulfonamides and carbamates. (294) The latter led, after intramolecular cyclization, to the formation of vinyl carbamates ( 449 ) rather than morpholine derivatives by attack on the carbonyl carbon ( Scheme 76 a).
To stop the reaction, add several volumes of ice-cold complete RPMI medium and spin down at 453 x g for 5 min at 4 C. Upon successful CFSE loading, the cell pellet will appear yellowish. Wash CFSE loaded cells one more time with ice-cold complete RPMI medium and spin down at 453 x g for 5 min at 4 °C before using for in vitro culturing or in vivo stimulation.
While comparing the other families, we found that ciprofloxacin (quinolones) represents the highest percentage (32.5%), followed by amoxicillin (β-lactams) (22.5%) and then tetracyclines (17.5%). These findings are in accordance with a study conducted in Bangladesh on 200 samples of chicken muscles showing similar percentages for ciprofloxacin (34%), amoxicillin (22%), and tetracyclines (20%
The reaction was stopped by boiling the sample for 3 min, and 0.5% sulfosalicylic acid was then added for protein precipitation. The sample was neutralized with NaOH and filtered. Determination of lactose and d -galactose was carried out using the lactose/ d -galactose UV method of Boehringer Mannheim (Mannheim, Germany).
anhydrous magnesium sulfate and 1.5 g of anhydrous sodium acetate, and DisQuE clean-up (tube 2), Australia 61 2 9933 1777, Belgium 32 2 726 1000, Brazil 55 11 5094 3788, Canada 1 800 252 4752 x2205, China 86 10 8586 8899, CIS/Russia 7 095 336
Registered office : c/o UNIZO Spastraat 8 – B – 1000 BRUSSELS Tel. 02/238 06 22 – Fax. 02/230 09 15 – [email protected] Softening Water Does Not Increase Corrosivity Water that has been softened by ion exchange, is sometimes
2011/9/1· The incidence of severe pre-eclampsia in European countries ranges from 2/1000 (deliveries) in Norway to 6.4/1000 (deliveries) in Belgium and Hungary (6). The 8th Confidential Enquiry into maternal and child heath (7) revealed pre-eclampsia and eclampsia as the second leading cause of direct maternal death, thereby contributing to a maternal death rate of 0.83 / 100,000 maternities.
Hundreds of metabolic enzymes work together smoothly in a cell. These enzymes are highly specific. Nevertheless, under physiological conditions, many perform side-reactions at low rates, producing potentially toxic side-products. An increasing nuer of metabolite repair enzymes are being discovered that serve to eliminate these noncanonical metabolites. Some of these enzymes are
Amidation kinetic reaction procedures A solution of 0.328 g (2 mmol) of 4-phenylbutanoic acid in 4 mL of test solvent was pre-heated to 100 C and benzylamine (0.235 g, 2.2 mmol) was added. The reaction vessel was stirred and heated to 100 C. Conversion ofN
2009/9/29· Science project: discussion about the reactions between acid and metals like aluminum and zinc, acid and metal oxides, and so on July 8, 2011 "Hi, Bradley. I''d say that most of the time nothing would happen because the metal has already reacted with oxygen to
Hard water is an aqueous solution containing magnesium, iron, and calcium ions in the form of minerals. The “hardness” of water is dependent on the concentration of these ions. In the presence of metallic ions, soap molecules will interact with the molecules and cause them to fall out of solution, forming a salt precipitate more commonly referred to as soap scum.
When magnesium sulphate is present the formation of Mg-related reaction products such as brucite additionally influences the chloride penetration. Later, up to 37 weeks of immersion, a decreasing chloride diffusion is noticed compared to samples exposed to a single chloride solution, due to pore blocking products of the sulphate reaction.
Pyrophosphate, which is produced as a byproduct, yields a white precipitate of magnesium pyrophosphate that can be detected visually in the reaction vial. The presence or absence of this precipitate allows the detection of DNA amplifiion.
UCL (University College London) is London''s leading multidisciplinary university, with 8,000 staff and 25,000 students.
After lipase reaction, it is possible to determine the free fatty acids by comparing the FA contents of the two methylation reactions (Williams et al., 1995). The objective of the present study is to compare these two procedures when analyzing pig fat samples.
This DNA purifiion chapter addresses general information on the basics of DNA isolation, plasmid growth and DNA quantitation as well as how purifiion by silica can help increase your productivity so you spend less time purifying DNA and more time developing
The HQ tag consists of 6 amino acids (HQHQHQ), and allows the protease to be immobilized on nickle affinity resins and removed from the cleavage reaction. ProTEV Plus protease performs over a broad pH and temperature range, and has been shown to be highly specific in cleaving fusion proteins with a TEV recognition site both in solution as well as when the fusion protein is bound to affinity
2013/8/23· The DPPH reaction and monoterpene compounds examined in this study. DPPH exhibits strong absorbance at 517 nm (purple) which decreases proportionately with the loss of its radical (A).The chemical structures of monoterpene compounds (+)-limonene (B), γ-terpinene (C), myrcene (D), and β-pinene (E) are shown.
From the results shown in Fig. 4 , it can be observed that the adsorption of VB 1 depends on the chemical composition of the synthetic Mt. Mt compositions Al 0.2, 0.7 and 1.0 adsorb maximum VB 1 amount in the pH range 4.0–8.0, Al 0.5 and 1.8 at pH = 5.0–7
By comparing the possibility of two mediators (SO 2 and MV), Koshechko et al., have shown that the radical ion MV +• (E p = −0.4 V) easily reduces SO 2 (E p = −0.9 V) to its radical anion which in turn activates CF 3 Br. Thus, a coination of both).
Reference Solution Reaction for Studies of Serine Proteases Marek Štrajbl, Jan Florián, and Arieh Warshel Belgium). JAI Press: Stamford, CT. 1999. xii + 237 pp. $109.50. ISBN 0-7623-0201-1. Terence A. Kelly Journal of the American Chemical Society
2014/4/11· The aim of this study was to learn to what extent the selected instrumental techniques, differential scanning calorimetry (DSC), as well as Fourier-transform infrared (FTIR) and Raman spectroscopies, can be used to detect both organic or inorganic magnesium compounds in the dietary supplements and medicinal products. Besides magnesium compounds as the active pharmaceutical …
Simply place 3-6 drops of the solution (oil) or a small amount of powder in the vial and check the color change reaction, comparing it to the table. Within a few minutes, you can check whether a substance has been identified.
The invention relates to a process for the preparation of a creep-resistant polypropylene by means of the following steps: (a) copolymerizing propylene and ethylene into a random copolymer at 40 to 110 C. using: a alyst system of the above-mentioned type; a
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