موقعك الحالي:صفحة رئيسية>المنتجات
2024.1.16 It is important to highlight that the studies mentioned used different initial concentrations of boron, since the concentration in industrial effluents can vary from 30 to 7000 mg.L −1, as shown in Table 2. As seen in this review, pH is a notable factor
Read More
1997.7.1 Abstract. This paper reviews published methods of sample preparation, determinand purification, and the determination of boron
Read More
As the O/A ratio further increased, the extraction of boron increased slightly. However, the concentration of boron in the organic phase decreased
Read More
2022.1.6 The effect of boron concentration on the degradation capacity of the electrode is undoubtedly significant, which is related to a number of factors: firstly, the
Read More
2022.6.29 Effective removal of boron from solutions at circumneutral pH by existing technologies such as reverse osmosis is constrained by high energy consumption and
Read More
2015.5.5 We here report that boron-doped graphene nanoplatelets with desirable electrical properties can be prepared by the simultaneous reduction and boron-doping of
Read More
2022.8.1 In contrast, by increase of oxygen concentration, the combustion time of boron agglomerates first increases from 183 ms to 242 ms and then decreases to 84 ms.
Read More
2023.6.27 The influence of the thickness of the hydrogen-rich silicon nitride layer on the amount of hydrogen introduced into the bulk of silicon wafers, with boron or gallium
Read More2023.11.2 Our results demonstrate that boron doping not only increases the CO 2 adsorption capability of the catalyst but also optimizes the electronic state of Co for CO
Read More
2023.6.27 Fourier Transform-infrared spectroscopy at 5.0 K show that the hydrogen concentrations can be varied by altering the film thickness. The effect of a subsequent passivation process, i.e. deposition of a second hydrogen rich dielectric film at an elevated temperature, is also investigated.
Read More2023.12.21 The binding process of boron with NMDG-modified adsorbents is shown in Figure 2. Using the click coupling technique, ... the adsorption peaked at pH 10.0. At a low boron concentration of 5 mg/L, polyvinyl alcohol-functionalized polymers showed a higher adsorption capacity (45.5 mg/g). However, at a higher boron concentration (50 mg/L),
Read More
2022.1.6 The effect of boron concentration on the degradation capacity of the electrode is undoubtedly significant, which is related to a number of factors: firstly, the increase in boron concentration will affect the nucleation and growth process of diamond grains, within a certain range (BDD 0.1-BDD 1.5) the increase in boron concentration will
Read More
2017.10.1 The process of electrocoagulation can be used for treatment of boron-infected water and wastewaters containing boron at initial concentrations of more than 50 mg/L. Acknowledgements This paper is a part of the results of a master's thesis in Environmental Health Engineering with the research code of 1394-0-34-1805.
Read More
2015.5.5 B-doped graphene nanoplatelets prepared at 1000 °C show a maximum boron concentration of 6.04 ± 1.44 at %, which is the highest value among B-doped graphenes prepared using various methods.
Read More
2023.11.16 In ramjet combustion chambers, carbon dioxide (CO 2) produced by the combustion of carbonaceous fuel enters the chamber together with boron agglomerates.In order to investigate the effect of CO 2 concentration present in an oxygen-containing atmosphere on the combustion characteristics and oxidation mechanisms of boron
Read More
2011.1.1 Boron concentration range variation within wafers of standard recipe using Helium is about 0.3 weight % in SACVD BPSG process. This paper describes the innovative ways developed to reduce the ...
Read More
2024.2.1 The boron concentrations at pH 9.0 were reduced to 1159, 1016 and 980 mg/L at 5, 10 and 20 g/L Al(OH) 3, respectively. ... In boric acid manufacturing, the first step of the process is boron leaching from boron-containing minerals with sulfuric acid. Therefore, no further purification is required since the recovered boron stream is directed ...
Read More
2023.12.6 formed. The conditions for boron doping were a doping energy of 6.85 keV and a boron ion dose of 1.0 1710 ions/cm2 during implantation. To investigate the effects of the plasma doping energy on the boron concentration of the oxide layer, different plasma doping energy conditions during the p-type poly gate process were also used, which
Read More
2023.4.1 Boron is widely distributed in both the hydrosphere and lithosphere of the earth, its concentration is very low (Boncukcuoğlu et al., 2004; Delazare et al., 2014; Hilal et al., 2011; Kir et al., 2011; Wolska and Bryjak, 2013).Boron is the 51st common element in the earth’s crust and its concentration varies from 1 to 500 mg-B/kg, depending on the
Read More
2022.3.16 Transmission electron microscopy results. (a–g) cross-sectional TEM images for various boron concentration.And inset images (1–3) are results of the fast Fourier transform (FFT) process for ...
Read More
2022.6.29 Boron is present in the form of boric acid (B(OH)3 or H3BO3) in seawater, geothermal waters, and some industrial wastewaters but is toxic at elevated concentrations to both plants and humans. Effective removal of boron from solutions at circumneutral pH by existing technologies such as reverse osmosis is constrained by high energy
Read More
2023.10.18 Plasma doping (PLAD) technology is widely used in the semiconductor industry. One of the problems associated with PLAD is precise dosage control and monitoring during the doping process. Excessive boron doping into the n-type poly gate will affect the p-MOSFET threshold voltage. In this study, we develop a novel method for the
Read More
2023.5.1 Boron tube diffusion process parameters for high-efficiency n-TOPCon solar cells with selective boron emitters. Author links open overlay panel Qinqin Wang a, kaiyuan Guo a, ... The peak concentrations of the p ++ and p + layers were 3.3 × 10 19 atoms/cm 3 and 6.6 × 10 18 atoms/cm 3, respectively (Fig. 6, ...
Read More
The combustion process of boron–magnesium agglomerates containing various weight percentages of magnesium powders (i.e., 0%, 2%, 5%, 15%, 25%, 35%, and 45%) were investigated in different oxygen-rich atmospheres (i.e., 40%, 60%, 80%, and 100%). ... An increase in the magnesium content or oxygen concentration makes the phenomenon
Read More
2022.8.1 Boron concentration prediction from Compton camera image for boron neutron capture therapy based on generative adversarial network. ... To simulate the CC imaging of the 0.478 MeV photons released in the BNCT process, the model based on the single layer CZT CC prototype from Kromek D-matrix has been built, the spatial
Read More
Boron is an essential plant micronutrient taken up via the roots mostly in the form of boric acid. Its important role in plant metabolism involves the stabilization of molecules with cis-diol groups. The element is involved in the cell wall and membrane structure and functioning; therefore, it participates in numerous ion, metabolite, and hormone transport reactions.
Read More
2023.8.15 The elution process was stopped until no boron was detected in the effluent. The elution curves were plotted using the time (t, min) ... The time for the boron concentration in the effluent to reach half of the influent concentration (τ) decreases with increasing flow rate from 216 to 99 min. The reason can be explained by the insufficient ...
Read More
The boron concentrations in the raffinate from the last contact rows of row 11 and row 12 were used to determine calculate the extraction efficiency of boron. The method was also adopted in the simulated multistage counter-current stripping experiment. ... The total boron recovery of the whole process was 97.79%. The above results showed that ...
Read More
2014.3.5 The most effective method to remove boron from aqueous solutions is adsorption technique, because the process requirements are simple and can be used in aqueous media with low concentration of boron. Boron adsorption can be conducted on various sorbents, e.g. chelating resins, polysaccharides, oxides, synthesized clay and fly
Read More
2021.6.10 Boron is taken up from the soil in the form of boric acid, B(OH 3), via a passive process, through a combination of direct diffusion across the membrane and facilitated diffusion through the ...
Read More2017.2.6 a function of lateral position for an opaque mask. (b) Equi-concentration contours for a 70 keV boron implant through a 1 m slit. Chapter 9 8 9.3 Damage As each ion penetrates the target, it undergoes a series of collisions displacing ... the competing process of self-annealing can occur to repair some or all of the damage as it is generated. A ...
Read More
2018.6.6 This study aims to investigate removal of boron from aqueous solution by electrocoagulation process at concentrations of less than 50 ppm. ... Boron concentration was reduced to less than 1.35 mg L −1 which means 95.6% removal efficiency is succeeded with the usage of Fe–Al electrodes. However, maximum boron removal efficiencies were
Read More
2021.3.28 1. Introduction. Boron is a common element in the environment and the 10th most abundant ionic species in the ocean [].Boron concentration in the ocean varies depending on the site and season, but the global average of boron concentration has been widely known as approximately 4.8 mg/L []; yet, it can range from 7 up to 13 mg/L in
Read More
2020.12.1 1. Introduction. Boron is a vital nutrient for human health and plant growth, and is considered as one of the seven most important nutrients for plant growth and development [1].Boron deficiency and toxicity vary within limited degrees of concentration, whereas excessive boron in irrigation water could be toxic and harmful for plants [2].The
Read More2018.2.1 Residual boron concentrations of 3.49, 8.24, 1.34, 13.50, and 18.74 mg L−1 were obtained from initial boron concentrations of 10, 20, 30, 40, and 50 mg L−1, respectively. The decrease in boron removal can be explained by the fact that the generated iron ions are not sufficient. According to the other investigators,[3,43] EC can be used for ...
Read More
2023.8.2 Boron is a chemical element with the symbol “B” and atomic number 5. It is a metalloid, meaning it has properties of both metals and nonmetals. Boron minerals are essential to many industrial and technological applications due to their unique properties and characteristics. It is essential to note that while boron is a necessary nutrient ...
Read More
2022.8.27 The boron removal efficiency rate of the SWRO + BWRO process, in a real operational context, can reach over 91%, and the final boron concentration in the produced water can meet the requirements of the water quality standards . Another method for improving the boron removal efficiency of SWRO is to add boron-selective resin (BSR)
Read More
2021.7.9 The currently used industrial method for large-scale H 2 O 2 production is the anthraquinone cycling process, ... 20 nA do not produce enough x-rays of boron, as boron has trace concentration in ...
Read More
الصين -تشنغ تشو -المنطقة الوطنية للتنمية الصناعية للتكنولوجيا المتطورة، جادة العلوم رقم 169.
الاتصال: 0371-86549132.