The result shows that there are Bronsted and Lewis acid sites in H4SiW12O40-Ti(SO4)2-La2O3-HZSM-5,and that the total acidity of the catalyst has much to do with the conversion of methanol and the yield of dimethlether.
The result also showed that,with the application of EAOF,the total acidity of the plum reduced to 0.1%,the contents of Vc and the soluble solids were improved as 0.2 mg/100g and 2.1%,respectively. There was no difference in the fruit rigidity.
The total acidity and the number of strong acidic center increase with the decrease of SiO_2/Al_2O_3 ratio. On the other hand,the SiO_2/Al_2O_3 ratio of DG zeolite has less effect on the characters of crystal structure, e.g. framework density and so on.
To introduce the conception of pure general acidity Based on large quantity of experimental data,by means of regression analysis,the quantitative relations between pure general acidity and Zn 2+ content and H 2PO - 4 content in zinc system phosphating solution have been studied,and the application of functional relation equations to practical production has been illustrated by examples
In the calcium content of fruit Ca(NO3)2 was the hightest, 13.55 mg/kg higher than CK . Contrary results could be found in the Cl~- and NO3~- contents and general acidity. The sugar/acid could be as light as 101.1 if Ca(NO3)2 was sprayed.
After administration of aspirin, the total acid volume, acidity and total 3-hour acid output were 1.5±0.3,16.1 ± 1.4 and 8.7 ± 2.7 respectively, which were all markedly increased as compared with those in baseline (P= 0.03, 0.009, 0.03).
In C57BL/6 mice, after administration of indomethacin, the total acid volume and total 3-hour acid output were 2.08 ± 0.16 and 2.9 ± 0.4 respectively, which were significantly higher than those in baseline (both P<0.0 001), while the acidity wasn't (P = 0.11);
在C57BL/6小鼠,腹腔内应用消炎痛后总胃酸分泌量和总酸度与基础水平相比差别显著(2.08±0.16 vs 0.82±0.06,P<0.0 001; 9.4±1.1 vs 2.9±0.4,P<0.0 001),而胃酸度也没有显著差别(P=0.11);
In Balb/c mice, after administration of indomethacin, the total acid volume and acidity were 3.4±0.3 and 5.8 ± 1.0 respectively, which were obviously higher than those in baseline (P= 0.007, 0.01), while the total 3-hour acid output wasn't (P= 0.16);
METHODS: The total acid volume (mL), acidity ([H+] mmol/L) and total 3-hour acid output (μmol/h) were determined after intraperitoneal administration of indomethacin and aspirin in the two different strains of mice by pylorus ligation technique and the gastric lesions were evaluated by Lanza score.
Low temperature zinc phosphatizing process composed of 60 g/L Zn(H 2PO 4) 2·2H 2O,90 g/L Zn(NO 3) 2·6H 2O, 1.5 g/L NaNO 2 and 0～1.0 g/L rare earth additive, was developed using for the high hardness surface of cold\|forming mold.
Compared with normal dosed group, ①the gastric juice pH values of middle and high dosed group were also decreased obviously (P<0.05), while the gastric juice acidity of low, middle and high dosed groups increased obviously (P<0.05)；
The catalysts 30% WO3/SnO2 and 20% WO3/ZrO2 (in acetone) and 10-20% WO3/TiO2 (in cumene) are the most active in CHP decomposition, and their activity is not related to their total acidity.
The tests results are compliant with the basic character of the catalyst; however, it reveals significant total acidity (0.274 mmol NH3/g) and the presence of Lewis strong acid centers (0.126 mmol Py/g).
The dependence of the penetration and the softening point of asphalts produced from acid sludge on the concentration of sulfuric and sulfonic acids that were present in the sludge, as well as on the total acidity of the initial sample, was studied.
75% of the total acidity could be effectively recovered.
The isomerization ability of the catalysts is linearly dependent on the total acidity of the surface.
The effect of different factors of corrosivity of grounds (hydrogen index, general acidity, concentration of Cl- and SO4-2 ions, degree of aeration) on the corrosion rate and hydrogenation of 17GS steel was investigated.
The authors conclude that the corrosivity of grounds with low resistivity is determined by their pH values, general acidity and degree of aeration.
For the case of acid and subacid grounds with low level of general acidity, their corrosion and hydrogenating impact can be modelled by a test in a deaerated solution with pH=5 and additives of Cl- ions.
The corrosion and hydrogenating impact of the superacid grounds with medium and high general acidity can be modelled by the test in solutions with pH=4 and pH=3, respectively.
The lack of potassium, together with general acidity, inhibits the conveying of sulfates for renal functioning.
On the basis of total acid hydrolysis, methylation analysis, periodate oxidation and NMR studies (1H and 13C) the structure of the repeating unit of the polysaccharide was assigned and indicated only α-(1→4) linked Glucan.
In the mentioned salts the ketoester group on treatment with sodium ethylate suspension in ether or benzene suffers partial or total acid cleavage, and then the Stevens 3,2-rearrangement takes place.
The total acid content and the profile of the exportation type caninhas are similar to the ones obtained for several international beverages.
TA significantly reduced the free acidity, total acidity and total acid output, but didn't affect the gastric juice volume, gastric pepsin activity, adherent mucus quantity of stomach wall and free mucus dissolving in gastric juice.
Before and after icv injection, 1-h total acid output (TAO) was determined and compared.
The Chian-Chung-Tang has been used clinically for treatment of gastric ulceration. It is composed of Hedysarum polybotrys,Cinnamom carsia,Paeonia lactiflora Gly- cyrrhiza uralensis, Angelica sinenss, Rhizoma Zingiberis, Fructus Zizyphi jujubae, and Saccharum Grannorum. 1.The induction rate of Shay rat ulceration together with the quantity of gastric secretion, free acidity, and total acidity was markedly dereased by Chian-Chung-Tang given subcutaneously, but the same effect was not found, when the drug was given...
The Chian-Chung-Tang has been used clinically for treatment of gastric ulceration. It is composed of Hedysarum polybotrys,Cinnamom carsia,Paeonia lactiflora Gly- cyrrhiza uralensis, Angelica sinenss, Rhizoma Zingiberis, Fructus Zizyphi jujubae, and Saccharum Grannorum. 1.The induction rate of Shay rat ulceration together with the quantity of gastric secretion, free acidity, and total acidity was markedly dereased by Chian-Chung-Tang given subcutaneously, but the same effect was not found, when the drug was given orally. 2.The movement of the stomach of the pigeon as well as the movement of the intestine of the rabbit in situ and that of rabbit and rat in vitro was depressed by the drug. 3.The drug was also found to antagonize the effect of pilocarpine and prostigmine upon the movement of intestine of rabbit in situ, and that by acetylcholine and pilocar- pine upon the movement of intestine of rabbit and rat in vitro. 4.The LD_(50) of Chian-Chung-Tang in mice was found to be 48g/kg given sub- cutaneously.