scholarly journals Preparation, characterization and cell labelling of strong pH-controlled bicolor fluorescence carbonized polymer dots

RSC Advances ◽  
2022 ◽  
Vol 12 (3) ◽  
pp. 1258-1264
Author(s):  
Zengchen Liu ◽  
Like Wang ◽  
Baodui Wang ◽  
Yahong Chen ◽  
Fengshou Tian ◽  
...  
Keyword(s):  
Ph Value ◽  
Water Solution ◽  
Vital Role ◽  
Cell Labelling ◽  
Polymer Dots ◽  
Alkaline Environments ◽  
Multicolor Fluorescence ◽  
Ph Controlled

Multicolor fluorescence N-doped CPDs from dextrin water solution in strong acidic and alkaline environments were synthesized and characterized, which revealed that pH value plays a vital role in the process of CPD growth.

scholarly journals Influence of thermal treatment and combustible additives on properties of Latvian clay ceramics pellets

2013 ◽  
Vol 7 (4) ◽  
pp. 175-180 ◽  
Author(s):  
Liga Dabare ◽  
Ruta Svinka
Keyword(s):  
Surface Area ◽  
Ph Value ◽  
Water Solution ◽  
Porous Ceramic ◽  
Mercury Porosimetry ◽  
Environmental Application ◽  
Wide Range ◽  
Different Temperatures ◽  
Ph Level ◽  
Clay Ceramics

Porous ceramic pellets for possible environmental application were produced from different Latvian clays by sintering at different temperatures. Their characteristics and influence of additives were analysed using X-ray diffraction, mercury porosimetry and BET tests. The obtained ceramic pellets from calcareous clays after immersion in distilled water change its pH value, which affects their capability to adsorb ions or molecules on the surface. The sorption capabilities are dependent on the pH level of water solution, composition of clays, and used adsorbate. Porosity of the produced pellets is mostly within range from 15 to 25 % throughout all sintering temperatures with a slight decrease at 1050 ?C. The specific surface area has a wide range up to 30 m2/g. The highest surface area has pellets sintered at lower temperatures. The adsorption capability of pellets was evaluated using water solutions with different ions. The most promising results were obtained with iodine sorption. For most pellets the sorption capacity was 12.7 mg/g, although for the pellets sintered at 1050 ?C it was lower.

An Original Aspirin-Containing Carbonic Anhydrase 9 Inhibitor Overcomes Hypoxia-induced Drug Resistance to Enhance The Efficacy of Myocardial Protection

2021 ◽  
Author(s):  
Wen Zhou ◽  
Bin Zhang ◽  
Keyu Fan ◽  
Xiaojian Yin ◽  
Jinfeng Liu ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Carbonic Anhydrase ◽  
Myocardial Ischemia ◽  
Ph Value ◽  
Acquired Resistance ◽  
Vital Role ◽  
Carbonic Anhydrase 9 ◽  
Myocardial Hypoxia

Abstract Purpose Hypoxic microenvironment plays a vital role in myocardial ischemia injury, generally leading to the resistance of chemotherapeutic drugs. This induces an intriguing study on mechanism exploration and prodrug design to overcome the hypoxia induced drug resistance.Methods In this study, we hypothesized that the overexpression of carbonic anhydrase 9 (CAIX) in myocardial cells is closely related to the drug resistance. Herein, bioinformatics analysis, gene knockdown and overexpression assay certificated the correlation between CAIX overexpression and hypoxia. An original aspirin-containing CAIX inhibitor AcAs has been developed.Results Based on the downregulation of CAIX level, both in vitro and in vivo, AcAs can overcome the acquired resistance, and more effectively attenuate myocardial ischemia and hypoxia injury than that of aspirin. CAIX inhibitor is believed to recover the extracellular pH value so as to ensure the stable effect of aspirin.Conclusion Results indicate great potential of CAIX inhibitor for further application in myocardial hypoxia injury therapy.

Adsorption Mechanism of Copper(II) Ions on Expansion-Treated Rice Husk

2011 ◽  
Vol 695 ◽  
pp. 13-16
Author(s):  
Xuan Liang ◽  
Xue Gang Luo ◽  
Xiao Yan Lin
Keyword(s):  
Removal Efficiency ◽  
Rice Husk ◽  
Photoelectron Spectroscopy ◽  
Adsorption Mechanism ◽  
Ph Value ◽  
Water Solution ◽  
Whole Process ◽  
Monolayer Adsorption ◽  
Strong Adsorption ◽  
Bulk Structures

Expansion-treated rice husk (ERH) had been used as adsorbent for removing copper(II) ions, and showed strong adsorption ability and removal efficiency for copper(II) ions. In this paper, the surface and bulk structures of ERH adsorbent were investigated by X-ray photoelectron spectroscopy (XPS) and scanning electronic microscopy (SEM), ERH was treated by water solution with different pH value, and the adsorption performance of ERH for copper(II) ions was investigated through adsorption static experiments in order to study the adsorption mechanism. The result showed that ERH treated by alkaline solution had high removal efficiency for copper(II) ions, the reason ascribed to the large surface area of ERH. ERH had competitive adsorption for H+ and Cu2+, and a monolayer adsorption process played an important role in the whole process.

Heterogeneous formation and partitioning of nitrous acid on water surfaces: dependency on the acidity

2021 ◽  
Author(s):  
Jun Zheng ◽  
Yan Ma
Keyword(s):  
Liquid Water ◽  
Nitrous Acid ◽  
Ph Value ◽  
Water Solution ◽  
Formation Rate ◽  
Water Soluble ◽  
Wet Chemistry ◽  
Water Surfaces ◽  
Heterogeneous Formation ◽  
Hydrolysis Of

<p>Hydrolysis of nitrogen dioxide (NO<sub>2</sub>) has long been recognized as a major formation path of atmospheric nitrous acid (HONO), which is regarded as a dominant hydroxyl radical (OH) source, particularly in a polluted environment. Since HONO is moderately water soluble and its solubility can be highly dependent on the acidity of the water solution, the HONO formation rate and its ensuring fate may also be affected by the acidity of the water surfaces. In this work, we investigated the hydrolysis of NO<sub>2</sub> on dilute sulfuric acid water solutions with a pH value ranging from ~3 to ~6. Both the gaseous HONO and dissolved nitrous acid solution were quantified by a wet-chemistry based HONO analyzer and ion chromatography analyses, respectively. The results showed that significant amount of HONO can participate into the aqueous phase at low acidity and as the acidity increased gas-phase HONO also increased. These results indicated that liquid water on various surfaces may both provide a reaction site for HONO formation and serve as a reservoir of HONO that can be released when the liquid water was evaporated.</p>

scholarly journals Synthesis of Nanosilica via Olivine Mineral Carbonation under High Pressure in an Autoclave

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 708 ◽  
Author(s):  
Srecko Stopic ◽  
Christian Dertmann ◽  
Ichiro Koiwa ◽  
Dario Kremer ◽  
Hermann Wotruba ◽  
...  
Keyword(s):  
High Pressure ◽  
Ph Value ◽  
Water Solution ◽  
Synthesis Method ◽  
Morphological Characteristics ◽  
Spherical Particles ◽  
Alkaline Solutions ◽  
Spray Pyrolysis Method ◽  
Co2 Absorption ◽  
Silicon Dioxide Nanoparticles

Silicon dioxide nanoparticles, also known as silica nanoparticles or nanosilica, are the basis for a great deal of biomedical and catalytic research due to their stability, low toxicity and ability to be functionalized with a range of molecules and polymers. A novel synthesis route is based on CO2 absorption/sequestration in an autoclave by forsterite (Mg2SiO4), which is part of the mineral group of olivines. Therefore, it is a feasible and safe method to bind carbon dioxide in carbonate compounds such as magnesite forming at the same time as the spherical particles of silica. Indifference to traditional methods of synthesis of nanosilica such as sol gel, ultrasonic spray pyrolysis method and hydrothermal synthesis using some acids and alkaline solutions, this synthesis method takes place in water solution at 175 °C and above 100 bar. Our first experiments have studied the influence of some additives such as sodium bicarbonate, oxalic acid and ascorbic acid, solid/liquid ratio and particle size on the carbonation efficiency, without any consideration of formed silica. This paper focuses on a carbonation mechanism for synthesis of nanosilica under high pressure and high temperature in an autoclave, its morphological characteristics and important parameters for silica precipitation such as pH-value and rotating speed.

The Influence of Co-Existing Ions on Adsorbs in the Aqueous Phase Pb2+ by Mycobacterium phlei

2011 ◽  
Vol 183-185 ◽  
pp. 654-657
Author(s):  
Dong Qin Zhou ◽  
Shu Juan Dai ◽  
De Zhou Wei ◽  
Shu Yong Yang
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Adsorption Process ◽  
Ph Value ◽  
Water Solution ◽  
Alkaline Metal ◽  
Adsorption System ◽  
Mycobacterium Phlei ◽  
Biological Surface ◽  
Positive Ion

The biological adsorption law removes the heavy metal ion, many factor influences, among, in the solution the inherent alkaline metal positive ion existence is affects the microorganism adsorption the important attribute. This article take Mycobacterium phlei as the absorbent, inspected the different pH value, the coexistence ion amount used as well as in tri-, four-, five-, six-coexistent ion systems, to absorbed water solution in Pb2+ ion influence. Through around the determination Mycobacterium phlei Contact angle and the adsorption the biological surface zeta - the potential shift, indicated the Mycobacterium phlei to the Pb2+ adsorption process in, the electrostatic attraction occupies the leadership, but in the multi-dimensional coexistence adsorption system, has the competition adsorption and the ionic.

scholarly journals IoT Enabled Soil Testing

2018 ◽  
Vol 7 (S1) ◽  
pp. 54-57
Author(s):  
P. Sindhu ◽  
G. Indirani
Keyword(s):  
Plant Growth ◽  
Moisture Content ◽  
Soil Fertility ◽  
Soil Nutrients ◽  
Mobile Application ◽  
Crop Production ◽  
Ph Value ◽  
Vital Role ◽  
Soil Testing

Agriculture is the main occupation of our country and it plays a vital role in our country. Using too much of fertilizers may lead to the inferior quality of the crop production. So the measurement of soil nutrients is greatly required for better plant growth. Determining the amount of nutrients in the soil is the key function. pH value is also one of the most important and informative soil parameter to detect the soil fertility and it is measured to identify the soil fertility. In the proposed system, it determines the crops which are suitable for the particular soil type. It will analyze moisture content, temperature and humidity in soil at real time and it will also suggest the crops based on determined PH of soil. This system is proposed to help the farmers to increase the production and the suggestions are made through the mobile application.

Manganese waste water treatment by fungi derived from manganese slag

2010 ◽  
Vol 62 (5) ◽  
pp. 1183-1189
Author(s):  
Yu-Zhu Ou-yang ◽  
Jian-Bing Cao ◽  
Xiao-Ming Li ◽  
Wei Zheng ◽  
Dong-Bo Wang ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Incubation Temperature ◽  
Rotation Speed ◽  
Ph Value ◽  
Water Solution ◽  
Waste Water Treatment ◽  
High Adsorption ◽  
Initial Ph ◽  
Manganese Slag

The aim of this study was to isolate a mould from the surface of manganese slag which had strong resistance and high adsorption of Mn2 + , and to determine the effects of initial Mn2 +  concentration, incubation temperature, rotation speed and inoculation amount on adsorption of Mn2 +  from manganese waste water solution. The result showed that a mould (A5) which was isolated from manganese slag had the adsorption rate of Mn2 +  to 97.5% at the initial pH value 6, inoculation amount 2%, rotation speed 150 r/min, a concentration of Mn2 +  500 mg/L, and a temperature of 28°C cultivated for 50 h. As there is no research on adsorption of Mn2 +  from manganese waste water by fungi before, this research showed a theoretical guidance on this field.

scholarly journals An azo-phenol derivative probe: colorimetric and “turn-on” fluorescent detection of copper(ii) ions and pH value in aqueous solution

RSC Advances ◽  
2017 ◽  
Vol 7 (33) ◽  
pp. 20537-20541 ◽  
Author(s):  
Yanchun Li ◽  
Xiaojun Han ◽  
Yan Song
Keyword(s):  
Aqueous Solution ◽  
Optical Properties ◽  
Ph Value ◽  
Water Solution ◽  
Fluorescent Detection ◽  
Phenol Derivative ◽  
Turn On

The optical properties of a novel, rhodamine-based derivative, synthesized by reacting rhodaminehydrazide and an azo-phenol derivative in ethanol, were investigated in ethanol–water solution.

scholarly journals A pH-Responsive Multifunctional Nanocarrier in the Application of Chemo-Photodynamic Therapy

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Xiaohong Hu ◽  
Ziyu Gao ◽  
Huaping Tan ◽  
Long Zhang
Keyword(s):  
Anticancer Drug ◽  
Ph Value ◽  
Water Solution ◽  
Drug Carriers ◽  
The Body ◽  
Ph Responsive ◽  
In Vivo Evaluation ◽  
Coarse Surface

In cancer therapy, combined utilization of anticancer drug and photosensitizer attracts increasing interest due to enhanced curative effects and reduced side effects. Since the drug delivery system is an effective method to enhance curative effects, drug carriers for codelivery of the two abovementioned molecules are essentially important for chemophotodynamic therapy. Based on the foundation, a nanocarrier with pH-responsive and targeted properties was designed, prepared, and researched in the work. A pH-sensitive nanoparticle was fabricated by acetylated β-cyclodextrin (Ac-β-CD) using oil-in-water (O/W) emulsion technique. During the fabrication processing, a functional emulgator (gelation-folic acid ester (G-FA)) with a biorecognition domain was absorbed onto the surface of the nanoparticle, which endowed a nanoparticle-targeted property. The nanoparticle exhibited a coarse surface, pH-responsive property, and similar fluorescence characteristic as G-FA. The cell endocytosis profile revealed that equilibrium endocytosis could be reached after being cocultured with 1.0 mg/mL nanoparticle for 8 h. Furthermore, camptothecin (CPT) as an anticancer drug and phthalocyanine (PcZn) as a photosensitizer were encapsulated into the nanoparticle during the fabrication processing. The nanoparticle enhanced the fluorescence effects of PcZn on water solution, and CPT encapsulation proportion was slightly influenced by initial CPT concentration. The pH value influenced the PcZn fluorescence behavior and CPT release behavior of the nanoparticle. In vitro cytoviability evaluation confirmed the therapeutic effect of the nanocarrier on HEP2 cells. Finally, the results of preliminary in vivo evaluation revealed that the reported nanocarrier in the research could inhibit cancer development with little effects on the body weight of mice.

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