Phosphate concentrations

Phosphate enters the aquatic system through runoff from pastures, croplands, urban areas, and sewage treatment systems and fosters algal bloom causing eutrophication at higher concentrations in water. Therefore, controlling its concentration through routine water quality monitoring in aquatic ecosystems is essential.

16p vialfrednobel 21-12-2023 5 2   Download

Part 2 book "Medical physiology" includes content: Organization of the urinary system, glomerular filtration and renal blood flow, transport of sodium and chloride, transport of urea, glucose, phosphate, calcium, magnesium, and organic solutes, transport of potassium, urine concentration and dilution, transport of acids and bases,... and other contents.

2195p oursky06 17-10-2023 5 1   Download

In this study, hydrogels based on in situ crosslinking between oxidized alginate (OA) and N,Ocarboxymethyl chitosan (NOCC) in combination with β-tricalcium phosphate (β-TCP) were prepared using different OA concentrations and OA to NOCC ratios.

15p viberbers 09-08-2023 3 3   Download

This study aims at the fractionation and concentration of phosphate from synthetic water in selectrodialysis to increase the concentration as a pretreatment prior to crystallization. A lab-scale ion exchange membrane electrodialysis system (selectrodialysis) was used to perform the experiments.

6p vidoctorstrange 06-05-2023 6 2   Download

Hydrogels loaded with chemotherapeutics are promising tools for local tumor treatment. In this work, redoxresponsive implantable hydrogels based on gellan gum were prepared as paclitaxel carriers for HER2-positive breast cancer therapy. To achieve different degrees of chemical crosslinking, hydrogels were synthesized in both acetate buffer and phosphate buffer and crosslinked with different concentrations of L-cysteine.

15p viginny 30-12-2022 14 2   Download

The efficiency of phosphate removal in aqueous solution by CaO, Ca(OH)2 and CaCO3 has been studied in this work. Batch of experiments conducted with the initial phosphate concentrations from 5 to 1000 ppm have shown that CaCO3 could be applied for phosphate removal at low concentration with the maximum phosphate removal capacity at 4.0 mg/g.

5p vipatriciawoertz 31-05-2022 13 1   Download

Eco-friendly flocculants of alginic acid, NaHCO3 and CaCl2.2H2O with advantages of strong gelation characteristics were prepared for supporting the removal of phosphate in synthetic wastewater using CaO and Ca(OH)2 as precipitants. The effects of weight ratios of each component in flocculants, dosage of flocculants and initial phosphate concentration were investigated through batch of experiments.

6p vipatriciawoertz 30-05-2022 11 1   Download

As a co-receptor for fibroblast growth factor 23, klotho plays a pivotal role in phosphate metabolism. The kidney is known to be the main source of soluble alpha-klotho and the principal regulator of its concentration.

9p vidarwin 22-02-2022 8 1   Download

The nutrient pollution index showed moderate to very high pollution while the waterbodies will pose very high non-carcinogenic health risks to users via the oral pathway. Overall, the waterbodies are at risk of eutrophication and efforts should be put in place to reduce anthropogenic activities around the area and thus input of nutrients in these water bodies.

8p thebadguys 15-01-2022 14 0   Download

Codeine is an opium alkaloid with a great potential of abuse among opioid consumers. Detection of codeine is a routine procedure in the military and government of some countries for personnel recruitment. Therefore, a specific, selective, and easy to use method would be an important improvement in such detection procedures. According to previous reports, short single-stranded DNA or RNA sequences with high affinity and specificity to their targets, aptamers, could be used for designing an accurate and specific biosensor for codeine.

8p langthannam 29-12-2021 31 0   Download

A new capillary electrophoresis method was developed for the simultaneous determination of dexpanthenol (DEX), lidocaine (LID), and mepyramine (MEP) in pharmaceutical preparations. The best results were obtained using 20 mM (pH 3.0) phosphate buffer as the background electrolyte. Separation was obtained using a fused-silica capillary (75 µm internal diameter, 50 cm total length, 41 cm effective length) and a potential of +30 kV at 20 ◦ C. Standards and samples were injected using a pressure injection at 50 mbar for 5 s and the analytes were monitored at a detection wavelength of 200 nm.

9p langthannam 29-12-2021 12 0   Download

This paper presents a simple, rapid, and accurate voltammetric method for determination of boron in water and steel samples using a disposable pencil graphite electrode. The oxidation of Tiron in the boron–Tiron complex in phosphate buffer at pH 7.5 was measured as a response. Type and concentration of supporting electrolyte, pH, ionic strength, Tiron concentration, scan rate, step amplitude, pulse amplitude, and pencil grade were investigated as the parameters affecting the peak current.

10p langthannam 29-12-2021 7 0   Download

The objective of the current effort was to determine the efficacy of Fe(II)-montmorillonite (Fe(II)-MMT) as an adjuvant for specific targeted adsorption of phosphate. Specifically, Fe(II)-MMT was studied to combat hyperphosphatemia and anemia arising from chronic renal failure. The adsorption of phosphate over time, pH, and initial concentration was studied. The systems were characterized by X-ray diffraction (XRD), Raman, and zeta potential. The experimental results demonstrated the adsorption time was set to 140 min to achieve maximum adsorption efficiency.

11p tudichquannguyet 29-11-2021 7 1   Download

Amorphous cerium phosphate was prepared and characterized. Three-level Box-Behnken design (BBD) was employed to analyze the effect of process variables such as initial pH (2–6), contact time (60–180 min), and sorbent amount (0.05–0.15 g) on the sorption capacity of europium. Analysis of variance (ANOVA) revealed that the main effect of initial pH and sorbent amount has a substantial impact on the sorption of Eu(III). Probability F-value (F = 3 × 10 −3 ) and correlation coefficient (R2 = 0.97) point out that the model is in good accordance with experimental data.

16p tudichquannguyet 29-11-2021 12 1   Download

Small RNAs (sRNAs) are 20–30 nt regulatory elements which are responsible for plant development regulation and participate in many plant stress responses. Insufficient inorganic phosphate (Pi) concentration triggers plant responses to balance the internal Pi level.

25p vilichoo2711 23-06-2021 19 1   Download

The current study includes the histopathological alterations induced by chronic (20 days) exposure of the fish Anabas testudineus to a sublethal concentration (0.092 g/L) of inorganic fertilizer, Di-ammonium phosphate. Some vital organs were taken for the study that is kidney, liver, intestine, testis and ovary. The present study showed major histopathological alteration like vacuolar degenerative changes, necrosis etc. found in liver, intestine, testis, ovary and kidney organs dysfunction in response to DAP toxicity effect in the fish A. testudineus.

9p cothumenhmong11 11-05-2021 10 1   Download

This paper deals with the phosphate limitation on growth, biomass, cell integrity and biochemical constituents of marine cyanobacterium, Lyngbya sp. BDU 90901. Lyngbya sp. BDU 90901 exhibited optimum growth (µ= 0.63), fresh biomass (3.3.7g/l), dry biomass (0.67g/l), chlorophyll-a (9.3 µg/ml), carotenoids (2.0 µg/ml), carbohydrate (600 µg/ml) at 25th day and protein (25 µg/ml) at 20th day of incubation.

13p trinhthamhodang11 27-04-2021 10 1   Download

=Stimulated by the depletion of phosphate resources and the need to avoid eutrophication, phosphate removal/ recovery has been studied in recent years. The aim of this study is to investigate the feasibility of phosphate recovery from wastewater by the hybrid system consisting of pellet reactor and selectrodialysis. The phosphates will be pre-concentrated in the selectrodialysis and then be recovered by a crystallization process where it will precipitate on to sand grains as calcium phosphate in a pellet reactor

6p caygaocaolon11 18-04-2021 13 2   Download

This study was conducted to determine organophosphate ester compounds in indoor dust in Hanoi - a populated city in Vietnam. In the study, the concentration and distribution of fifteen organophosphate esters (OPEs) were analyzed in indoor dust specimen. In general, the recorded total concentrations of OPEs in dust ranged from 2.7 to 14.1 g/g and the average quantities varied from 0.2 to 1.0 g/g.

8p nguaconbaynhay10 20-02-2021 6 2   Download

In this study, the recombinant endoglucanase was purified by his - tag affinity chromatography with differrent processes, such as using phosphate buffer with or without sodium cloride, pretreatment of samples with ammonium sulphate before supplying into affinity column, using various concentration of imidazole for washing.

9p tamynhan10 24-10-2020 17 1   Download