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The Caragana korshinskii Kom stems were pulverized using a laboratory plant shredder (FZ-102, Shanghai, China) and sieved to obtain 40–60 mesh powder, followed by pyrolysis under N 2 in a muffle furnace (Boyuntong GF11Q-B, Nanjing, China). Pyrolysis of the powder was conducted with a heating rate of 5 °C/min at a nitrogen flow rate of 1.2 L/min.

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Decoupling feldspar dissolution and precipitation rates at ...

This is particularly true at near-neutral pH conditions, which is the condition for the majority of natural waters (Drever, 1988, McBride, 1994, Langmuir, 1997). For example, it is impossible to prepare a near-neutral pH solution that is near-equilibrium with respect to feldspars but not supersaturated with a large number of secondary Al-Si phases.

Author: Chen Zhu, J. Donald Rimstidt, Yilun Zhang, Jinting Kang, Jinting Kang, Jacques Schott, Honglin Yuan

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Recovery of phosphate and dissolved organic matter from ...

The Mg 2+ in the supernatant was almost undetectable (<1.5 mg/L) at pH above 7.0, whereas Ca 2+ was lower than 40 mg/L. This suggests the favorable condition of the composite use in neutral and alkali solution systems due to relatively stability of the composite.

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Effects of Dietary Stevioside Supplementation on Feed ...

Jan 23, 2019 · On days 19 and 20, rumen fluid samples were collected at 0, 2.5, and 6 h after morning feeding via the mouth of goat using a plastic pipe and approximately 10 mL of ruminal fluid was extracted and discarded [18,19]. The first 10-mL sample was discarded to eliminate saliva contamination that would falsely elevate the pH level.

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(PDF) Tea Ash-A New Medium for Water Defluoridation

A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.

Release of selected chemical elements from shale drill ...

Leaching batch test as a quality control and compliance tool was used to describe solubility and release of selected chemical elements to aqueous solution at different pH (3–12). Despite low cation exchange capacity values, shale leachates were found to contain elements of potential concerns.

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CONSUMERS - European Commission

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(PDF) Facile fabrication of pH-responsive and swellable ...

Jan 21, 2019 · Facile fabrication of pH-responsive and swellable slow release microparticles of chlorpheniramine maleate with chitosan-starch matrices and their crosslinks

PPT – INTRODUCTION TO FOOD ANALYSIS 1126 PowerPoint ...

pH DETERMINATION 18 pH Determination. pH refers to the relative amounts of acid and base in a product. It is scientifically defined as the negative log of the hydrogen ion concentration. pH ranges from 0 to 14 with pH of 7 being neutral. pH values below 7 are considered acids and pH values above 7 are basic or alkaline.

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(PDF) Facile fabrication of pH-responsive and swellable ...

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Preparation and Photocatalytic Performance of …

In this study, multiwalled carbon nanotubes (MWCNTs)/TiO 2 nanocomposites were obtained by constant volumetric wet impregnation processes. The prepared catalysts were characterized by scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The effect of reaction conditions on photocatalytic performance of the catalysts was investigated by the degradation of methyl orange ...

CONSUMERS - European Commission

Stay informed, get involved! The Rapid Alert System enables quick exchange of information between 31 European countries and the European Commission about dangerous non-food products posing a risk to health and safety of consumers.

Impact of concentrated leachate recirculation on ...

Products of neutral pH chemical oxidation, had a definite positive impact on the quantity of β-proteobacteria 16S rRNA, whereas the same gene specified for Nitrospira sp. as well as amoA did not ...

A method for Si isotope tracer kinetics experiments: Using ...

The Si isotope tracer method introduces an enriched rare Si isotope (29 Si or 30 Si) to an experimental solution that is interacting with a natural silicate mineral (Gruber et al., 2013).The contrast in isotope composition between experimental solutions and mineral reactant with natural abundances of Si isotopes makes the method extremely sensitive for detection of reactions.

Seasonal variations of atmospheric heterocyclic aromatic ...

1. Introduction. Heterocyclic aromatic amines (HAAs), a family of compounds known to be mutagenic and carcinogenic, are formed during the process of cooking meat, poultry, fish, and other foods at high cooking temperatures (Nagao et al., 1977).All they have a characteristic multi-ring aromatic structure with one or more nitrogen atoms in their ring system and exocyclic amino group.

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Comparison of characteristics and fibril-forming ability ...

From Fig. 7(a), in different pH buffer, the values of fibril-forming ability of BC was higher (p < 0.05) than that of TC and both of which reaching the maximum at pH 7.0. Subsequently, the effect of different NaCl concentrations on fibril-forming ability was studied at constant pH …

Journal of Nanomaterials - Hindawi Publishing Corporation

Artemia egg shells have an asymptotic sized pore structure (pore diameter: 500 nm–2500 nm), which could be used as a porous carrier for the preparation of nanocomposite materials. The objective of the present study was to prepare shell-supported TiO2 using a naturally porous carrier, Artemia egg shell, and to exhibit a case study of shell-supported TiO2 for formaldehyde removal.

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pH DETERMINATION 18 pH Determination. pH refers to the relative amounts of acid and base in a product. It is scientifically defined as the negative log of the hydrogen ion concentration. pH ranges from 0 to 14 with pH of 7 being neutral. pH values below 7 are considered acids and pH values above 7 are basic or alkaline.

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A 59-year sedimentary record of metal pollution in the ...

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Cellulose-Nanofiber-Mediated Sorption-Benefitting Holed ...

After addition of 9.27 g of TEOS, the mixture was stirred at RT for 24 h and then subjected to hydrothermal treatment at 423 K for 24 h. The bottom precipitates were collected by filtration, thoroughly washed with D.W. to neutral pH, and dried at 353 K overnight. After pyrolysis at 823 K in air for 3 h, silicalite-1(0) was obtained.

Effects of Tea Saponin Supplementation on Nutrient ...

Abstract. Two experiments were conducted using Dorper × thin-tailed Han crossbred ewes. In experiment 1, eighteen ewes were randomly assigned to two dietary treatments (a basal diet, or the same basal diet supplemented with 2.0 g tea saponin (TS)/head/day) to investigate the effects of TS supplementation on nutrient digestibility and methane emissions.

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What causes 'old person' smell? | HowStuffWorks

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