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Copyright of Journal of Irrigation & Drainage is the property of Journal of Irrigation & Drainage Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To explore formation and failure mechanism of rebar passivation film in the liquid-phase environment of alkali-activated slag (AAS) system, AAS cementitious material systems with different mixing designs were prepared. The time-dependent evolution of the pH value of AAS real pore solution was studied in various factors such as different types of activator, alkali equivalent, water-glass modulus, fly ash addition, and curing time. In addition, the generation time, composition, thickness, and critical chloride threshold of rebar passivation film in simulated pore solution were monitored and analyzed over time. The results show that the pH value of AAS real pore solution decreases with the increase of curing time, with pH values of all samples remaining above 12. 8 at 28 d. The increase in pH value in the simulated pore solution reduces the formation time of rebar passivation film, increases its thickness, and enhances its resistance to chloride ion erosion. The characteristic of AAS real pore solution having a higher pH value can provide a more favorable liquid phase environment for the stable existence of rebar passivation film, thereby improving the long-term performance of reinforced concrete structures. [ABSTRACT FROM AUTHOR]

Copyright of Petroleum Refinery Engineering is the property of Petroleum Refinery Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To evaluate the preservation effect of normothermic mechanical perfusion with red blood cells from humanized genetically modified pig on severed human limbs. Methods Severed human limbs were perfused with red blood cells from humanized genetically modified pigs for 6 h. Perfusion solution was taken every hour to measure the oxygen partial pressure, Na+, K+, Ca2+, pH value, glucose, lactic acid and creatine kinase levels. Superficial flexor muscle was sampled to detect the changes of tumor necrosis factor (TNF)-α, interleukin (IL)-2 and IL-1 levels. At 0 and 6 h after perfusion, the superficial flexor muscles of the forearm were taken for pathological examination. Intercellular space and glycogen consumption of skeletal muscles were observed. An appropriate amount of forearm vessels was collected every 2 h to detect the apoptosis of vascular endothelial cells. X-ray angiography was performed before perfusion and 6 h after perfusion to observe the filling degree of finger-tip peripheral vessels. Results The oxygen partial pressure was observed in the normal range throughout the perfusion. Na+ concentration peaked at 1 h, reaching 138.7 mmol/L, and then fluctuated within the normal range. K+ level peaked at 2 h up to 6.08 mmol/L, then decreased and fluctuated within the normal range. Ca2+ concentration reached the peak at 4 h, up to 1.03 mmol/L. Glucose level was gradually decreased at the beginning of perfusion, reaching the lowest value of 17.7 mmol/L at 2h after perfusion, and then maintained a dynamic balance. The pH value was decreased to 7.28 at 6 h after perfusion. The lactic acid level was increased to 9.6 mmol/L at 1 h after perfusion, and then gradually decreased. The creatine kinase level was increased at the start of perfusion, reached the peak at 2 h up to 20 030 U/L, then decreased and remained stable at the end of perfusion. At the end of perfusion, the morphology of muscle fibers was normal, the gap among muscle fibers was expanded slightly, and the glycogen of skeletal muscles was not significantly accumulated. At 0 h perfusion, the number of apoptotic cells in vascular endothelial cells was large, which was declined at 6 h perfusion. Evident vascular filling was observed at 0 h, and the filling degree of some finger-tip vessels was decreased at 6 h. Conclusions Normothermic mechanical perfusion of severed human limbs with red blood cells from humanized genetically modified pigs may continuously and stably supply energy and oxygen, adjust the ion pH balance of perfusion solution, maintain normal cellular metabolism and exerts certain protective effect upon severed human limbs. [ABSTRACT FROM AUTHOR]

【Objective】 Panax Notoginseng is a medicinal herb and primarily grown in Southern China. This paper investigates the impact of irrigation and fertilization on soil potassium and pH, as well as yield and quality of Panax Notoginseng. 【Method】 The experiment was conducted in Dalishu Village, Luxi County, located in the Honghe Hani and Yi Autonomous Prefecture, Yunnan Province. It consisted of four fertilizations by applying the 480 kg/hm2 of fertilizers at different ratios in the seedling, flowering, fruiting and root gain stages: 25%∶25%∶25%∶25%(F1), 25%∶30%∶20%∶25%(F2), 30%∶30%∶15%∶25%(F3), and 40%∶20%∶10%∶30%(F4). Each fertilization had three irrigation treatments: 200 m3/hm2(W1), 300 m3/hm2(W2) and 400 m3/hm2(W3). The control (CK) was F1 combined with 92 m3/hm2 of irrigation. In each treatment, we measured the changes in soil potassium content and pH. The technique for order preference by similarity to ideal solution (TOPSIS) was used to evaluate all treatments. 【Result】 ① When irrigation and fertilization were the same, soil pH decreased with soil depth and tended to stabilize as the crop grew. The soil pH showed little sensitive to fertilization. When irrigation was the same, the average soil pH was lower in the four treatments than in the CK. During the experimental period, pH of the 0-60 cm soil in different treatments varied from 4.80-8.66. W3F1, W2F4 and W2F3 gave the optimal soil pH for the crop to grow. ② Both total and available soil potassium decreased with increasing soil depth. As the crop grew, the total potassium in the 0-60 cm soil layer increased, while the available potassium decreased initially before increasing. With increasing irrigation amount, total soil potassium decreased, while the available potassium increased initially followed by a decline. Fertilization influenced the dynamics of total and available potassium. Irrespective of fertilization and irrigation, potassium uptake by roots in different growing stages was ranked as follows: fruiting period>flowering period>root weight gain period>seedling stage. Of all the treatments, W2F3 was optimal for soil potassium, with total and available potassium being 10.40 g/kg and 56.69 mg/kg, respectively. ③ Regardless of fertilization, with the increase in irrigation amount, the yield and partial factor productivity (PFP) of the crop increased first followed by a decline. The yield, water use efficiency and PFP varied with fertilization. TOPSIS analysis showed that the optimal irrigation was 300 m3/hm2 and the optimal fertilization was applying 144, 144, 72 kg/hm2 and 120 kg/hm2 of fertilizers in the seedling, flowering, fruiting and root weight gain stage, respectively. 【Conclusion】 Based on soil potassium, pH, as well as yield and quality of Panax Notoginseng, the optimal irrigation and fertilization for Panax Notoginseng production in the studied area were irrigating 300 m3/hm2 and applying 144, 144, 72 kg/hm2 and 120 kg/hm2 of fertilizers in the seedling, flowering, fruiting and root weight gain stage, respectively.

This is an article in the field of mining engineering. The diatomite was modified with sodium dodecyl sulfonate and ferroferric oxide, and the influence of external factors on the adsorption effect was analyzed. And the experiment of the phase composition change and the microstructure change after the modified diatomite adsorbs heavy metal ions was carried out. The results show that when the modified diatomite content is 4 g/L, the adsorption time is 40 min, the temperature is set to 30 ℃, the pH value is set to 5, and the initial concentration is set to 200 mg/L, the adsorption of the modified diatomite is relatively good. The fitting degree of the Freundlich model to the test curve is above 0.90, and the fitting degree of the Langmuir model to the test curve is below 0.9, which shows that the Freundlich isotherm adsorption model is more suitable for the change law of the adsorption of heavy metal lead ions on modified diatomite. There is no significant difference in the characteristic diffraction peaks of the XRD pattern before and after the adsorption of lead ions on the modified diatomite. Only the peak intensity of the diffraction peak is reduced. However, the other mineral components inside the modified diatomite remain unchanged and the structure does not change significantly. This also shows that modified diatomaceous earth can effectively adsorb lead ions in sewage. However, the adsorption process is basically physical adsorption.

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Copyright of Multipurpose Utilization of Mineral Resources / Kuangchan Zonghe Liyong is the property of Multipurpose Utilization of Mineral Resources Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Compared with the traditional ammonium acetate exchange method and calcium acetate exchange method to determine cation exchange capacity (CEC), hexamminecobalt trichloride method has obvious advantages in the analysis of large quantities of samples. However, the application scope of this method is limited, and the detection results of neutral and alkaline samples are good, but the detection results of acidic samples are as low as 50%. In order to solve these problems, the pH was adjusted to alkaline with 2mol/L sodium hydroxide solution, the CEC value of the sample was significantly improved, and the determination results of both acidic and alkaline samples reached the range of standard values. By drawing the pH adjustment curve, the volume of 2mol/L sodium hydroxide solution was obtained in soil samples with different pH ranges, so as to adjust the pH value of unknown samples and realize the accurate determination of CEC. On the basis of the original method, the pH of the sample was adjusted to alkalinity, and the precision of the optimized method ranged from 1.02% to 3.82% (n=6). After optimization, the application scope of the method is expanded, the precision and accuracy are improved, and the detection efficiency of a large number of samples is effectively improved. [ABSTRACT FROM AUTHOR]

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Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This is an article in the field of environmental engineering. In order to study the effect of kaolin on the adsorption performance of wastewater containing Cu2+ and Pb2+, experiments on the adsorption of heavy metal ions by kaolin under different initial concentrations, temperatures, adsorption time, kaolin content and pH values are carried out. And analyzed the results of Cu2+ and Pb2+ co-adsorption test by kaolin. The results show that the adsorption effect of kaolin on metal Pb2+ ions is better than the adsorption effect of kaolin on metal Cu2+ ions. Combining the test results and economic benefits, when the initial concentration is 200 mg/L, the pH is 6, the temperature is 30 °C, the kaolin content is 1.5 g, and the adsorption time is 2.0 h, Kaolin has the best adsorption effect on metal Pb2+ and Cu2+ ions. The adsorption capacity of metal Pb2+ ions reached 56.38, 56.22, 58.76, 35.75, and 42.42 mg/g, respectively. The adsorption capacity of metallic Cu2+ ions is 45.99, 47.45, 47.27, 25.26, 22.52 mg/g. On the whole, the adsorption capacity of kaolin for co-adsorbed metal ions (Cu2+, Pb2+) is smaller than that of a single ion. This is because two metal ions will affect each other's adsorption process during the adsorption process. The fit of Langmuir model to the test curve is much higher than the fit of Freundlich model to the test curve. This shows that the Langmuir isotherm adsorption model is more suitable for the change law of the amount of metal ions adsorbed by kaolin. Furthermore, it is proved that the adsorption of heavy metal ions by kaolin belongs to surface adsorption, and the adsorbed heavy metal ions exist independently of each other.

Copyright of Multipurpose Utilization of Mineral Resources / Kuangchan Zonghe Liyong is the property of Multipurpose Utilization of Mineral Resources Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to find a general corrosive treatment scheme suitable for underground structures in Foshan area, based on the geotechnical investigation of the Phase I project of Foshan Metro Line 4, this study adopted the method of literature research and comparative analysis of specifications to conduct in-depth analysis of the corrosion resistance requirements in different specifications. Furthermore, the existing problems in the GB/T 50476-2019 Durability Design Standard for Concrete Structures were discussed, and combined with the actual situation of the existing Foshan Metro Line 3 and Guangzhou Metro Line 7 West Extension to Shunde section, a set of groundwater corrosion prevention and control design standards suitable for subway structures in Foshan area were carried out. The application results in the early construction site of Foshan Metro Line 4 show that when executed according to the above design standards, the relevant performance indicators meet the regulatory requirements. [ABSTRACT FROM AUTHOR]

Copyright of Food & Fermentation Industries is the property of Food & Fermentation Industries and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to study the effect of extraction pH on gelling properties and characteristic peptide identification of pigskin gelatin, the molecular mass distribution and gelling properties of pigskin gelatin extracted under different pH conditions were studied by dodecyl sodium sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), a texture analyzer and a rheometer. Moreover, the characteristic peptides were identified by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The results showed that with a decrease in pH, the relative molecular mass of pigskin gelatin initially increased and then decreased, the gel intensity gradually declined, and the gel melting temperature and gelling temperature initial increased and then decreased. Gelatin extracted at pH 1 had the worst gelling properties. HPLC-MS/MS analysis showed that pH significantly affected the traceability of gelatin. In this study, 62, 71, 79 and 76 characteristic peptides were detected from pigskin gelatins extracted at pH 1, 3, 5 and 7, respectively. Among them, 37 characteristic peptides were common to all pigskin gelatins. Compared with our previous research, 17 characteristic peptides were found to be common to pigskin gelatins extracted under different conditions. These stable common characteristic peptides could be used as an important basis for pigskin gelatin traceability with high accuracy.

This study explored the change law changing pattern of pH value of steel slag leaching solution in the process of steel slag dissolution with an aim to study the influence of steel slag on environment.Specifically, it analyzed the influence law of steel slag basicity, magnesium oxide content, water temperature, steel slag particle size, liquid-solid ratio and other factors on pH value of steel slag leaching solution and conducted a comparative test with on-site steel slag.Results show that the pH value of the leaching solution after steel slag dissolution is in the range of 10~12, and with the change of time, the pH value first increases and then decreases.Increasing the basicity of steel slag and the content of magnesium oxide can increase the pH value of the leaching solution.The increase of water temperature, steel slag size and liquid-solid ratio can reduce the pH value of the leaching solution.

For improving the corrosion resistance of 904L stainless steel under high Cl- concentration environment with different pH values condition，the corrosion behavior of 904L austenitic stainless steel in 100 g/L NaCl solution at different pH values was studied by cyclic polarization curves，electrochemical impedance spectroscopy，Olympus confocal microscopy，scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS).Results showed that the corrosion resistance of 904L stainless steel increased with the increase of pH value，EIS consisted of two capacitive reactance arcs，and the radius of capacitive reactance arc increased with the increase of pH value，and the capacitive reactances were all in the same order of magnitude.Meanwhile，lower pH value conditions could enhance the destructive effect of Cl- on the passive film.With the decrease of pH value，the range of passive region of the material decreased.When the pH＝2，slight pitting occurred on the surface of the material.

To study the environmental characteristics of heavy metal contaminated soil solidified with rice husk ash(RHA), the toxicity leaching test and pH value test of RHA and cement stabilized cadmium(Cd)-contaminated soil were carried out. The effects of RHA and cement content, curing time, Cd content on the environmental characteristics of solidified contaminated soil were studied. The results showed that; The leaching concentration of Cd decreased with the increase of curing age. The leaching concentration of Cd first decreased and then increased with the addition of RHA, and the curing effect is better when the RHA content is 5%-10%. When the content of Cd is 100 mg/kg, the leaching concentration of Cd met the standard limit value. The pH value of solidified contaminated soil increased first and then decreased with the increase of the content of RHA and curing age. The pH value of solidified soil decreased with the increase of Cd content under different curing ages. The pH value of leaching solution first increased and then decreased with the increase of the RHA content, and reached the peak value when the RHA content is 5%-10%. The pH value of leaching solution decreased with the increase of curing age. The Cd leaching concentration decreases with the increase of pH value of leaching solution, which is consistent with the conclusion that the solidified effect of contaminated soil is better when the pH value is higher. [ABSTRACT FROM AUTHOR]

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Agriculturae Zhejiangensis is the property of Acta Agriculturae Zhejiangensis Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering Geology / Gongcheng Dizhi Xuebao is the property of Journal of Engineering Geology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Exogenous silicon is widely applied to soils to alleviate the soil cadmium contamination. The effect of silicon on the translocation and transformation of cadmium in plants and soils has been thoroughly studied, but the influence of silicon on soil water movement has rarely been reported. Hence, an experiment is conducted to investigate the influence and mechanism of silicon (0, 200, 400 kg/hm²), cadmium (0, 2.5 and 5 mg/kg) and their reactions on the soil water characteristic curve (SWCC). The group of soil with no addition of silicon and cadmium (0 kg/hm², 0 mg/kg) is denoted as CK for comparison. The SWCCs of soils are measured by pressure plate extractor, and pH, zeta potential. Field Emission Scanning Electron Microscopy (FESEM) are performed for the soil samples. After that, three models including Brooks-Core (BC) model, Van Genuchten (VG) model, and Dual-porosity (DP) model are used to fit the experiment data. The results show that ➀ in comparison with the CK, cadmium has no influence on the SWCCs, the right-skewed SWCCs of soils with silicon application indicate that more water is held in soils, whereas the left-skewed SWCCs of cadmium-contaminated soils with silicon application indicate a reduction in the water holding capacity of soils within the suction range of 710~1 200 kPa. ➁ Compared to CK, cadmium has no influence on the soil pore distribution. Silicon application in both no cadmium-contaminated and cadmium-contaminated soils increase the proportion of soil macropores (equivalent pore size of 0.002 14~0.002 50 mm), whereas there is no influence on the small pores (equivalent pore size of 0.000 49~0.002 14 mm). ➂ The images of FESEM illustrate that there is no difference between the CK and the cadmium-contaminated soils, whereas the soil particles are more clustered after silicon application in comparison with CK. ➃ Silicon application can significantly increase the pH value and the absolute value of soil zeta potential. The high absolute value of soil zeta potential is of benefit to disperse the soil colloidal particles, which goes against the formation of soil micro-aggregates. However, the silicic acid gel is formed after silicon application can promote the cementation of soil micro-aggregates and thus increase the proportion of large pores in the soil and improved soil water holding in the low suction range. van der Waals force might be weakened due to the formation of silicon-cadmium complex after the application of silicon in cadmium-contaminated soil, which reduces water holding ability of soils within the high suction range. ➄ Compared with BC model and VG model, DP model can better describe the influence of silicon and cadmium on soil water characteristic curve, and the influence of silicon application on soil hydraulic characteristics can be quantitatively expressed by adjusting saturated and residual water content of soil water characteristic curve. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Chinese Institute of Food Science & Technology is the property of Journal of Chinese Institute of Food Science & Technology Periodical Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Storage & Process is the property of Tianjin Academy of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Modern Food Science & Technology is the property of Editorial Office of Modern Food Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue is the property of Beijing Research Institute of Mining & Metallurgy Technology Group and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In SCAL indirect air-cooling system， the aluminum pipe orifice of radiator is the position most easily to be corroded. Water leakage even occurs at this position in some units. Clarifying the corrosion type and key influencing factor of water quality can provide guidance for chemical operators and ensure the stable operation of units. In this paper， the corrosion type of the aluminum pipe orifice of radiator and key influencing factor of water quality were illustrated by field investigation of three SCAL intercooling system radiators in China， the analysis of the water quality data and suspended substance composition as well as laboratory simulation test. Results showed that aluminum pipe orifice corrosion in the radiator of SCAL indirect air-cooling system was erosion corrosion. With the same material and fluid flow state， when the pH value of circulating water increased to 9.5， it could obviously accelerate the erosion corrosion of aluminum pipe orifice， which could lead to corrosion damage of aluminum pipe orifice in a short time. This was the key influencing factor of water quality that increasing the corrosion of pipe orifice.Chemical operators should strengthen the detection of pH value of circulating water and adjust it timely.

Activated corrosion product is an important radioactive source term in the primary circuit of pressurized water reactor, which has an important influence on reactor shielding design, personnel protection and accident safety. As a key parameter of pressurized water reactor (PWR) coolant, its pH value plays an important role in the process of material corrosion, dissolution and precipitation of corrosion products. The solubility of corrosion products and the corrosion rate of materials in the coolant can be controlled by adjusting the pH value by coordinating the concentration of boronlithium in the coolant, so as to achieve the purpose of controlling the source term of activated corrosion products. At present, the influence of pH value on the corrosion rate of materials and the solubility of corrosion products is more analyzed in the world. The influence of pH value on the radioactive source terms was described in varying degrees through experiments and feedback data of nuclear power plant operation. However, the cost of obtaining power plant operation data is high, so it is of great application significance to analyze the influence of pH value on radioactive source term from the perspective of simulation calculation. In this paper, the solubility of corrosion products and the corrosion rate of materials under different pH values were calculated, and the radioactive activity in each area of the primary circuit of PWR under different pH values was calculated by substituting it into the selfdeveloped source term analysis CATE code of activated corrosion products. After systematic research and analysis, it is concluded that when the pH value is 56 to 74, the solubility of corrosion products decreases continuously with the increase of pH value, and the decreasing range gradually becomes slow. The corrosion rate of 304 stainless steel decreases with the increase of pH value and reaches a balance after decreasing to a small value. The corrosion rate of Inconel decreases with the increase of pH value, and the decrease amplitude gradually becomes slow. With pH value increasing, the radioactive activity decreases, when the pH value increases to 7.2 or so, the radioactive activity decreases slower, when the pH value is 74, the radioactive activity in the core, steam generator and coolant decreases slightly compared with that when the pH value is 72, but the radioactive activity in coolant pump, transition section and cold pipe section increases slightly. pH value affects the source term of primary corrosion products of PWR through the solubility of corrosion products and corrosion rate of materials. Moderately increasing pH value can increase the corrosion resistance of nickel base alloy and stainless steel materials, and reasonably adjusting pH value can control the release and deposition of corrosion products, so as to achieve the purpose of reducing the level of radioactive activity in primary circuit. Considering the solubility of corrosion products in primary circuit of PWR, corrosion rate of materials and radioactive activity of corrosion products, the pH value should be controlled within 7.2-7.4.

For further revealing the effect of pH value on the formation of conversion coating on magnesium alloy surface, the formation mechanism of phosphate chemical conversion coating on AZ91D magnesium alloy surface was studied, and the influence of the pH value of phosphating solution on the morphology and corrosion resistance of the conversion coating was mainly discussed. The potentiodynamic polarization test data and electrochemical impedance spectroscopy of the conversion coatings were compared, and the corrosion resistance of phosphate conversion coatings prepared in 3.5% NaCl solution under different pH conditions was analyzed by soaking test. Results showed that the key to the film formation of phosphate was the combined action of the hydrolysis equilibrium process of manganous dihydrogen phosphate [Mn(H2PO4)2] and the hydrolysis condensation process of ammonium metavanadate (NH4VO3). The conversion coating was greatly affected by the pH value of the phosphating solution. With the increase of pH value, the corrosion resistance of the conversion coating was gradually improved, but the thickness showed a trend of increasing first and then decreasing after reaching the extreme value. When the pH value of phosphating solution was 4.0, the coating had the best quality and the optimal corrosion resistance.

Chernozem with pH 5.38, 6.54, 7.16 and 8.11 (No. A, B, C and D) were selected as the research object. The effects of nitrogen fertilizer (urea, diammonium phosphate) addition on the acidity change and acid-base buffing performance of chernozem were studied by constant temperature culture test. The results showed that urea and diammonium phosphate reduced the pH values of the four chernozems by 0.72, 0.53, 0.94, 0.44 and 0.89, 0.58, 1.18 and 0.54 units, respectively. For the four soils, the degree of pH reduction was in the order of C＞B≥A＞D. After the application of nitrogen fertilizer, the pH of sample D was still alkaline, so no exchangeable acid, H+ or Al3+ were detected. The exchangeable acid content of soil samples A, B and C increased by 0.07, 0.94, 3.62 times, 0.23, 0.74, 2.93 times, exchangeable H+ by 0.12, 1.14, 7.27 times, 0.26, 0.97, 4.73 times, exchangeable Al3+ by 0.15, 0.77, 2.35 times, 0.21, 0.54, 2.29 times, respectively. This indicated that the increase of exchangeable acid, H+ and Al3+ in chernozem after the addition of nitrogen fertilizer followed the order of C ＞B＞A. As considering the addition of urea and diammonium phosphate, the contents of exchangable acid, H+ and Al3+ in chernozemic showed no significant difference. The contents of exchangeable acid, H+ and Al3+ of chernozem were increased with the decrease of soil pH value in the neutral and acidic range. After the addition of urea and diammonium phosphate, the acid-base buffer capacities of the four soil samples were decreased by 2.82%, 10.27%, 3.24%, 2.99% and 2.26%, 3.80%, 3.70% and 3.94%, respectively, and there was no significant difference between the addition of urea and diammonium phosphate. The acid-base buffer capacity of chernozem was significantly positively correlated with soil pH and organic matter content and negatively correlated with soil exchangeable H+ and AI3+. In conclusion, the addition of nitrogen fertilizer promoted the contents of exchangeable acid, H+ and Al3+ of chernozem to different degrees, and reduced the soil pH value and acid-buffer capacity. [ABSTRACT FROM AUTHOR]

Copyright of Water Conservancy Science & Techonlogy & Economy is the property of Water Conservancy Science & Technology & Economy Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Henan Agricultural Sciences is the property of Editorial Board of Journal of Henan Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Tetracycline (TC) can easily lead to persistent environmental toxicity via bio-enrichment effects, due to the inefficient bio-absorption, high solubility, and high bio-activity. Advanced oxidation processes based on sulfate radicals (SR-AOPs) can be expected to serve as an alternative means. Green low-cost biochar (BC) can be also used as an uneven catalyst. The persulfate (PS) was efficiently decomposed to generate the high-oxidation to restore power free radicals (OH, and SO4-·) during the degradation mineralization of organic matter. In addition, the annual waste bone production has reached 1348 tons in 2021 in China. Traditional treatments of waste bone can also be limited in the implementation conditions or cure such defects as bacterial reproduction. The waste bone can be prepared to catalyze the PS degradation TC. There are different properties of thermal temperature, crystallization, and surface shape made of BC, leading to the removal performance of pollutants. In this study, the different structures of pig bones coal with cooking pig bones were prepared as the raw materials at different temperatures of thermal resolution from 500 ℃ to 900 ℃. Energy spectroscopy was selected to analyze the effect of heat resolution on the pig bone's carbon shape, active phosphorus (hydroxyapatite, HAP) crystal structure, oxygenic acid, as well as the active functional units and cavity structure. Then, the material performance was compared to determine the optimal material pH, and PS parameters impact. The optimal system was achieved in the active oxygen sudden extinction to investigate the interaction between bone carbonization temperature and structure for the catalyst degradation performance. The results showed that there was a noticeable carbonization structure of the pig’s bone with the change in the carbonization temperature, indicating three distinct structures of layered cracks, needle-shaped clusters, and empty heart balls at three supply temperatures. Compared with 500 ℃ and 900 ℃, the crystalline structure formed at 700 ℃, and the fully volatile organic components presented the 700BPBC surface calcium phosphorus in the high-temperature formed crystal and the sp² structural carbon frame in the pig coal combined to form the needle-shaped fiber structure in the form of cluster. The more fine and shorter narrow conveyor was formed with a more microporous structure and better crystal comparison of phosphatic minerals. Energy and infrared spectrum analysis showed that the non-crystalline transformation was significantly influenced by the thermal resolution temperature, and then the content of C, O, Ca, and P, due to the full splitting of organic collagen and inorganic phosphorus and crystalline composition in HAp. As such, the 700BPBC was superior to the other two kinds of pig bone biochar with the rich -OH and active CHAp. The catalytic degradation experiment showed that the degrading capacity order from large to small is 700BPBC, 500BPBC, 900BPBC. Among them, the 700BPBC shared a stronger performance of catalytical degeneration for the TC, due to the small, narrow conveyor, rich active functional agglomeration spots, and better crystalline comparison. Furthermore, the ion form of quercetin was easier to capture than pig coal, when the solution environment was weakly acidic (pH value is 5). The best activity was achieved in the free radicals produced by sulfate (PS). The moderate overdose of sulphate (BC:PS = 1:6) produced the most effective free radical. The OH contributed the most under the 700BPBC/PS system. The free radical reaction was the dominant pathway to catalyze the degradation reaction. There were active CHAp and C=O-induced non-free radical reactions. [ABSTRACT FROM AUTHOR]

In this paper, CaCl2 and KH2 PO4 were used as raw materials, Na2 EDTA·2H2 O as chelating agent, and NH3·H2 O was used to adjust pH value of the solution, the calcium-phosphate coatings on titanium substrate were prepared via hydrothermal method, and the effects of filling condition (FC) (16% ~64%) and pH value (3. 5 ~6. 0) on morphology and phase constitutions of the coatings were systematically investigated. The results show that: when the pH value is 3. 5 and 4. 0, the coatings are mainly platelet-like calcium hydrogen phosphate (DCPA) (P1) at different FC, and FC has no remarkable effect on phase constitution of the coatings; when the pH value is 4.5 and 5.0, dandelion-like hydroxyapatite (HAP) (P63 / m) are easily found at lower FC, and with the increase of FC, the coating changes from dandelion-like HAP to platelet-like DCPA; when the pH value is of 5. 5 and 6. 0, the coatings are mainly dandelion-like HAP at different FC, and with the increase of FC, the crystallinity of HAP increases, while with the increase of pH value, the diameter of dandelion-like HAP decreases. Otherwise, the wettability of the three typical coatings (i. e., the dandelion-like HAP, the platelet-like DCPA, and the mix of (HAP + DCPA)) show much better wettability than the titanium substrate, this indicates that the calciumphosphate coatings would benefit the future osseointegration. Meanwhile, the formation mechanisms of different kinds of coatings were discussed. [ABSTRACT FROM AUTHOR]

The blast furnace slag was modified with DTAC to prepare a low-cost and environment-friendly adsorbent for the treatment of dye wastewater. The study analyzes theadsorbent dose, adsorption time, initial dye concentration and pH value on the adsorption capacity of KN-R reactive brilliant blue from the modified slag , and the variation rule of characterization of the modified slag was also analyzed. The results show that when the amount of modified slag is 10 g/L, the initial concentration of dye is 60 mg/L, the pH value is 2, and the adsorption time is 120 min, the maximum decolorization rate of the modified slag can reach 96%, and the initial concentration of 150 mg/L is the optimal solubility, the decolorization rate and adsorption capacity are both high at this concentration. Through XRD and FTIR tests, the characterization characteristics of slag and modified slag were compared and analyzed. It was found that DTAC could better modify slag, and the adsorption capacity of modified slag was significantly improved.

Copyright of Petroleum Refinery Engineering is the property of Petroleum Refinery Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Mycosystema is the property of Mycosystema Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Xinjiang Agricultural Sciences is the property of Xinjiang Agricultural Sciences Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Atomic Energy Science & Technology is the property of Editorial Board of Atomic Energy Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to research the sedimentation stability of water-based magnetic fluid, the sedimentation stability of water-based Ni0.5Zn0.5 Fe2O4 magnetic fluid at different pH values was studied, and the experimental phenomena were analyzed. The results show that when the mass fraction of OA (oleic acid) is 4%, the mass fraction of SDS (sodium dodecyl sulfate) is 3%, and the mass fraction of Ni0.5Zn0.5 Fe2O4 is 2. 5%, the magnetic fluid as-prepared has the best stability. When pH value is <7, the sedimentation stability of magnetic fluid decreases with the decrease of pH value, but the viscosity increases with the decrease of pH value. When pH is >7, the sedimentation stability of MHD decreases with the increase of pH value. The higher the temperature is, the better the dispersion is. The pH value has a certain influence on the thermal dispersion of the magnetic fluid. The pH value has an important influence on the magnetic field settling stability and magnetic viscosity of magnetic fluid. Under the action of constant or increasing magnetic fields, the settling coefficient and viscosity of magnetic fluid change with the change of magnetic field and pH value. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Tiangong University is the property of Journal of Tianjin Polytechnic University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

When MgO NPs are widely used，they will be leaked into the growth environment of plants. The pH value of the environment will also affect the release of metal ions from nanoparticles and their interaction with plants. In this study，wheat（Triticum aestivum L.），which was largely planged in China，was chosen as the test subject for the investigation of the mass concentration changes of Mg2+ ions in MgO NPs suspension at different pH values and its effects on wheat growth via ion-selective microelectrod. The results showed that the mass concentration of Mg2+ gradually increased with time and stabilized after 48 h. Adjusting the pH value of the suspenstion to acidic values promoted the release of Mg2+ . For the 80 mg/L MgO NPs suspension，the mass concentration of Mg2+ at pH=6. 5 was 24. 31 mg/L，increased significantly as compared with that in the unadjusted suspension，31. 47 mg/L. At the same time，this adjustment also increased the absorption of Mg2+ by wheat，thereby，to a certain extent，reduced the inhibitory effect of MgO NPs on wheat growth. [ABSTRACT FROM AUTHOR]

Copyright of Petroleum Refinery Engineering is the property of Petroleum Refinery Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The influence of complexing agent, solution pH value and temperature on the quality of electroless nickel plating of diamond powder at low temperature were investigated. At the temperature of 35 t and the pH value of 5, the stability of plating solution, deposition rate, morphology and phosphorus (P) content of electroless nickel plating coating were tested and analyzed by changing the ratio of complexing agent. The results show that CeHgO, • H2O (20 g/L) + (CH2)2(COOH)2(5 g/L) is the best complexing agent in test samples. The electroless plating solution corresponding to the complexing agent has good stability and rapid deposition rate (0. 391 5 g/h), and the obtained coating is leak-free and dense, with P weight content of 11. 73%. The deposition rate, morphology and P content of electroless plating samples were measured and analyzed by changing pH value and temperature of plating solution with the best complexing agent. The results show that when the temperature of the plating bath is 35 t and the pH value is 3 ~13, the deposition rate increases and the P content gradually decrease with the increase of the pH value. When the pH value is higher than 11, the rapid reaction rate is difficult to stabilize the pH value of the plating solution, and the plating solution is easy to decompose, so the pH value is more suitable within 5 - 11. The effect of temperature on plating was studied in the range of 30 - 50 t at solution pH value of 5. It is found that the deposition rate and P content increase with the increase of temperature, and the plating layer is dense and leak-free. When the temperature is higher than 45 t, the reaction rate is too fast and it is not easy to stabilize the pH value of the plating solution, so the temperature is more appropriate in the range from 35 t to 45 C. [ABSTRACT FROM AUTHOR]