A comparative study on the effect of pH values and carbonic additives on the supercapacitive performance of LDH-derived Ni-Co-Al oxide

2021 ◽  
Vol 43 ◽  
pp. 103211
Author(s):  
Samaneh Vahedi ◽  
Morteza Saghafi Yazdi ◽  
Ahmad Razaghian Arani ◽  
Marziyeh Azadfalah
Keyword(s):  
Comparative Study ◽  
Supercapacitive Performance ◽  
Effect Of Ph ◽  
Ph Values ◽  
Al Oxide

scholarly journals The role of pH on the survival of rumen protozoa in steers

2010 ◽  
Vol 39 (10) ◽  
pp. 2262-2267 ◽  
Author(s):  
Raul Franzolin ◽  
Burk A. Dehority
Keyword(s):  
Experimental Period ◽  
Adaptation Period ◽  
Individual Animal ◽  
Effect Of Ph ◽  
Ph Values ◽  
Rumen Protozoa ◽  
Rumen Ph ◽  
Sampling Times ◽  
Ciliate Protozoa

In order to study the effect of pH on defaunation in the rumen, four rumen fistulated steers were fed a basal roughage diet for a 4-week adaptation period followed by 17 weeks of feeding with three diets and two feeding levels of high concentrate diet. Rumen outflow fluid rate was evaluated in both ration levels. Rumen protozoa population was monitored weekly and when animals became defaunated, protozoa were reinoculated with rumen contents from one of the faunated steers. At every two weeks, during all the experimental period, rumen pH was measured in all animals at 0, 4, 8 and 12 h after feeding. It was observed an individual animal influence on the establishment and maintenance of the rumen ciliate protozoa population. In all sampling times, mean rumen pH values were higher in faunated steers than in the defaunated ones. No differences were observed in rumen outflow fluid rates between the two ration levels. Extended periods of low rumen pH are probably more detrimental to the survival of ciliate protozoa in the rumen than other factors.

Effect of pH Values on Magnetic Properties of Electroplated NiFe Layers

2003 ◽  
Vol 437-438 ◽  
pp. 57-60 ◽  
Author(s):  
Xiao Ping Li ◽  
Z.J. Zhao ◽  
S. Ang ◽  
S.J. Koh ◽  
T.B. Oh ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Effect Of Ph ◽  
Ph Values

Effect of pH on Glycolate and Ammonia Excretion in L-MSO Treated Chlorella Cells

1987 ◽  
Vol 42 (5) ◽  
pp. 525-529
Author(s):  
Yoshihiro Shiraiwa ◽  
Georg H. Schmid
Keyword(s):  
Chlorella Vulgaris ◽  
Major Part ◽  
Ammonia Excretion ◽  
Low Ph ◽  
Final Concentration ◽  
The Other ◽  
Effect Of Ph ◽  
Photosynthetic Rates ◽  
Ph Values ◽  
Glycolate Metabolism

Abstract The effect of pH changes on the excretion of ammonia and glycolate from algal cells into the medium was investigated in L-MSO (final concentration, 0.5 mм) -treated High-and Low CO2-cells of Chlorella vulgaris 211-11 h. The excretion was analyzed in the condition in which the cells were continuously gassed with air at 25 °C. At the values tested, generally more ammonia was excreted in L-MSO-treated Low CO2-cells than in L-MSO treated High CO2-cells. In both kinds of algal cells more ammonia was excreted at low pH-values and absolutely no ammonia was excreted at pH 8. In the dark, no or only slight ammonia excretion was observed in both L-MSO-treated High and Low CO2-cells. Under all these conditions no or only very low glycolate excretion was observed in both L-MSO treated High and Low CO2-cells. In High CO2-cells rates of photosynthesis were high at pH 6 and lower at higher pH values. On the other hand Low CO2-cells showed practically little dependence of photosynthetic rates on the pH. This result might indicate that the major part of the ammonia excretion observed, was not due to the inhibition of photosynthesis at acid pH values. It is known that ammonia excretion in L-MSO treated algal cells is due to the inhibition of the refixation of ammonia which originates from the glycine-serine aminotransferase reaction in the glycolate pathway. Our results demonstrate that glycolate production and glycolate metabolism are more intense at low pH values when compared to high pH values. This is valid for both High and Low CO2-cells. Low CO2-cells in Chlorella vulgaris 211-11 h exhibit a more active glycolate metabolism than High CO2-cells.

scholarly journals A comparative study on Poly(ε-caprolactone) film degradation at extreme pH values

2016 ◽  
Vol 130 ◽  
pp. 118-125 ◽  
Author(s):  
G. Patricia Sailema-Palate ◽  
A. Vidaurre ◽  
A.J. Campillo-Fernández ◽  
I. Castilla-Cortázar
Keyword(s):  
Comparative Study ◽  
Ph Values

Effect of pH on glutamate efflux from rat kidney mitochondria

1984 ◽  
Vol 246 (3) ◽  
pp. F266-F271 ◽  
Author(s):  
A. C. Schoolwerth ◽  
K. F. LaNoue ◽  
W. J. Hoover
Keyword(s):  
Rate Constant ◽  
Rat Kidney ◽  
Glutamate Transport ◽  
Matrix Space ◽  
Medium Ph ◽  
Effect Of Ph ◽  
Kidney Mitochondria ◽  
Ph Values ◽  
Glutamate Efflux

To provide further insight into the relationship between glutamate transport and metabolism in rat kidney mitochondria, the effect of pH on [U-14C]-glutamate efflux from [U-14C]glutamate-loaded mitochondria was tested. Glutamate efflux, measured in rotenone-inhibited energized mitochondria at 28 degrees C, was first order with respect to matrix glutamate. Glutamate efflux was tested at different medium pH values ranging from 6.4 to 7.9. Efflux was fastest at pH 7.9 with a rate constant of 0.988 min-1 and decreased progressively at lower pH values such that the rate constant at pH 6.4 was 0.359 min-1. A highly significant correlation between pH and the rate constant of glutamate efflux was observed. When medium pH was held constant at 7.0, matrix pH (range pH 7.2-8.4) did not affect the rate of glutamate efflux. The reduction in glutamate efflux at low pH provides an explanation for the increased concentration of glutamate observed in the mitochondrial matrix space of isolated rat kidney mitochondria incubated at acid medium pH. The elevated glutamate concentration in turn contributes to the accelerated oxidative deamination of glutamate by glutamate dehydrogenase at acid pH. Moreover, these findings suggest that the reduction in renal cortex glutamate levels observed in acute acidosis in vivo may be explained by a decreased rate of glutamate transport from mitochondria to cytosol coupled with an augmented rate of glutamate oxidation in the matrix.

Effect Of pH On Chemical-Mechanical Polishing Of Copper And Tantalum

2001 ◽  
Vol 671 ◽  
Author(s):  
Anurag Jindal ◽  
Ying Li ◽  
S. V. Babu
Keyword(s):  
Chemical Mechanical Polishing ◽  
Removal Rate ◽  
Surface Characteristics ◽  
Direct Result ◽  
Rate Variation ◽  
Removal Rates ◽  
Effect Of Ph ◽  
Passivating Layer ◽  
Ph Values ◽  
Glycine Solution

ABSTRACTpH has a strong effect on the polish rates of copper (Cu) and tantalum (Ta) [1]. In this paper, removal rates of Cu and Ta using aqueous slurries containing alumina and silica abrasives in H2O2-glycine solution are studied at varying pH values. It is observed that variation in the Cu and Ta removal rates is a direct result of the change in surface characteristics of the films. Surface characteristics such as presence/absence of a passivating layer and hardness of such layer vary with pH and hence result in removal rate variation. It is also shown that a favorable Cu/Ta polish rate selectivity can be obtained by adjusting the pH of the slurry.

Interfacial complexation behavior of anionic and cationic cellulose derivatives

RSC Advances ◽  
2014 ◽  
Vol 4 (98) ◽  
pp. 55459-55465 ◽  
Author(s):  
Mahmoud H. M. A. Shibraen ◽  
Chunyan Wang ◽  
Hajo Yagoub ◽  
Qian Yuan ◽  
Shuguang Yang ◽  
...  
Keyword(s):  
Ionic Strength ◽  
Carboxymethyl Cellulose ◽  
Cellulose Derivatives ◽  
Effect Of Ph ◽  
Ph Values ◽  
Assembly Behavior

Study effect of pH values, ionic strength and temperature on assembly behavior of quaternized cellulose and carboxymethyl cellulose.

Effect of pH and Chemical Surfactant on Thermal Conductivity Enhancement of Cu-H2O Nanofluids

2008 ◽  
Author(s):  
Xinfang Li ◽  
Dongsheng Zhu ◽  
Xianju Wang ◽  
Nan Wang ◽  
Zhengdong Wang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Ph Value ◽  
Combined Treatment ◽  
Weight Fraction ◽  
Effect Of Ph ◽  
Conductivity Enhancement ◽  
Practical Applications ◽  
Heat Transfer Fluids ◽  
Ph Values ◽  
Thermal Constants

Nanofluids have been attractive for the last few years with the enormous potential to improve the efficiency of heat transfer fluids. This work focuses on the effect of pH and sodium dodecylbenzenesulfonate (SDBS) surfactant on the thermal conductivity of nanofluids.The thermal conductivity was measured by a Hot Disk Thermal Constants Anlyser. The results showed that the thermal conductivity enhancements of Cu–H2O nanofluids are highly dependent on the weight fraction of nanoparticle, pH values and SDBS surfactant concentration of nano-suspensions. The Cu–H2O nanofluids with an ounce of Cu have noticeably higher thermal conductivity than the base fluid without nanoparticles, For Cu nanoparticles at a weight fraction of 0.001 (0.1 wt %), thermal conductivity was enhanced by up to 10.7%, with an optimal pH value and SDBS concentration for the highest thermal conductivity. Therefore, the combined treatment with both the pH and chemical surfactant is recommended to improve the thermal conductivity for practical applications of nanofluid.

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