Boric acid
-
The highest luminescence product consists of spheroidal and relatively uniform particles with sizes around 0.6-1.0 µm. The variation of the precipitated precursor with temperature, the influence of sintering temperature on structure and luminescence, the mineralization role of boric acid and the chemical reactions that occur with generation of precipitated precursors and upon heating to give luminescent solid solution products are mentioned.
10p dianmotminh02 03-05-2024 2 1 Download
-
In this work, the influences of boric acid and high alumina cement used as modifying additives on the formation of CaO∙Al2O3 and CaO∙2Al2O3 were studied. Herein, commercially available chalk of the M-90 label and technical alumina of the G-0 label were utilized as initial raw materials. Heat treatment of powder mixtures with various concentrations of modifying additives was carried out in the temperature range of 1250-1350oC with an isothermal exposure times of 1h and 2h.
8p nhanchienthien 25-07-2023 10 3 Download
-
In the present paper, the fluorescence sensor based on Schiff base and boric acid was developed for easy and rapid detection of L-tryptophan in different samples such as milk and bovine serum albumin. The photoluminescence intensity was measured by using fluorescent measurements and the results indicated that the developed fluorescent sensor was exhibited selective, sensitive, reliable determination against L-tryptophan, and a series of various analytes such as cations, amino acids, and organic compounds were used to investigate the selectivity of the fluorescent chemosensor.
13p lyhuyenthu 31-01-2023 2 2 Download
-
The present work aimed at studying the interaction between caesium iodide particles and gaseous boric acid through a Thermal Gradient Tube (TGT) from 1023 K to 453 K under Ar/H2O. Particles size range of transported particles was measured by ELPI and the fraction of gaseous compounds by ICP-MS and UV–visible spectroscopy.
10p vironald 15-12-2022 9 4 Download
-
Bài viết Ảnh hưởng của calcium cloride, boric acid và brassinolide xử lý trước thu hoạch đến màu sắc vỏ và thời gian bảo quản trái quýt hồng nghiên cứu ảnh hưởng của calcium cloride, boric acid và Brassinolide xử lý trước thu hoạch đến màu sắc vỏ trái và thời gian bảo quản trái quýt Hồng (Citrus reticulata Blanco cv. Hong) nhằm tìm ra loại dưỡng chất ảnh hưởng đến màu sắc vỏ trái, khả năng bảo quản sau thu hoạch trái quýt Hồng.
8p viaudi 29-08-2022 15 2 Download
-
Thí nghiệm thực hiện nhằm mục tiêu tìm ra nồng độ Ca(NO3)2 và H3BO3 riêng lẻ hoặc kết hợp đến sự sinh trưởng, năng suất và độ cứng cây trên giống lúa ML202. Thí nghiệm được bố trí theo thể thức khối hoàn toàn ngẫu nhiên gồm 9 nghiệm thức: Đối chứng (phun nước), Ca(NO3)2 0,5%, Ca(NO3)2 1%, H3BO3 50 ppm, H3BO3 100 ppm, Ca(NO3)2 0,5% + H3BO3 50 ppm, Ca(NO3)2 0,5% + H3BO3 100 ppm, Ca(NO3)2 1% + H3BO3 50 ppm và Ca(NO3)2 1% + H3BO3 100 ppm, mỗi nghiệm thức được lặp lại 4 lần.
9p viindranooyi 09-05-2022 26 3 Download
-
Nghiên cứu nhằm nâng cao chất lượng và năng suất, chất lượng và giảm tổn thất sau thu hoạch của trái quýt Hồng. Thí nghiệm được thực hiện tại Phòng thí nghiệm Sinh lý thực vật, trường Đại học Cần ơ và huyện Lai Vung, tỉnh Đồng áp, từ tháng 3 năm 2019 đến tháng 02 năm 2020.
7p vilouispasteur 11-03-2022 40 3 Download
-
Quantitative bacterial culture (QBC) is the gold standard for diagnosing canine urinary tract infections. Current guidelines recommend QBC within 24h of urine collection and that unpreserved urine is refrigerated until culture. However, temperature-controlled transport is rarely feasible, indicating a need for alternative storage during transport of urine from primary veterinary practices to the microbiology laboratory.
8p vidarwin 22-02-2022 19 1 Download
-
Impedance measurement was used to quantify the amounts of PbSO4 and PbO in the initial stage of the oxidation. H3BO3 decreased the positive grid corrosion of all alloys, while impurities increased it. Although impurities increased the self-discharge during constant current discharge, H3BO3 was found to decrease it, except for the alloy containing the 3 impurities and the Cu-containing alloy. Under open-circuit conditions, H3 BO3 increased significantly the self-discharge rate, but impurities were found to suppress it.
15p langthannam 29-12-2021 7 0 Download
-
Solutions of salicyclic, ascorbic, and citric acids were reacted with boric acid, followed by NaH2PO4 . The products, triphosphateborate ester of salicylic acid (1), orthosphateborate ester of ascorbic acid (2), triphosphateborate ester of ascorbic acid (3), and orthosphateborate ester of citric acid (4), were flash precipitated with cold acetone and characterised by microanalysis, thermal analysis, FT-IR, Raman, 11 B NMR, 31P MAS NMR, and mass spectroscopic techniques.
12p langthannam 29-12-2021 11 0 Download
-
Boron methacrylate (BAc) monomer was synthesized via an esterification reaction. Boric acid, neopentyl glycol, and 2-hydroxyethyl methacrylate (HEMA) were reacted to obtain boron-containing acrylic monomer. Characterization was achieved by FT-IR, 13 C NMR, 1 H NMR, and 11 B NMR and the results for the synthesized monomer were compared to those for HEMA. Homopolymer and copolymers with styrene (St) were synthesized via free radical polymerization. The properties of the synthesized styrene copolymers were investigated using several techniques.
12p langthannam 29-12-2021 4 0 Download
-
In this work, boron-doped CQDs (B-CQDs) were synthesized by using boric acid, urea, and citric acid via hydrothermal method to use as a novel additive material for poly(3-hexylthiophene-2,5-diyl) (P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) based organic solar cells. The OSCs with an inverted device structure were fabricated on titanium dioxide (TiO2 ) thin film. It was showed the crystallinity, morphological and optical properties of P3HT:PCBM films improved after B-CQDs additive. The best performance was obtained to be a 39.65% of FF, a 546 mV of Voc, an 8.
13p langthannam 29-12-2021 9 0 Download
-
The fine-tuned regulation of the Halliwell–Asada cycle (ascorbate–glutathione pathway) in Arabidopsis thaliana under boron (B) toxicity was shown in our previous report. In this study, we investigated the expression levels of some members of the glutathione S-transferase (GST) superfamily, such as phi (GSTF2, GSTF6, GSTF7, and GSTF8), tau (GSTU19), and zeta (GSTZ1) classes in Arabidopsis thaliana that were exposed to 1 mM boric acid (1B) and 3 mM boric acid (3B).
9p tudichquannguyet 29-11-2021 14 1 Download
-
Recently, boron (B) has been found to form a complex with anthocyanin, which could be evidence for the B tolerance mechanisms that reduce free B in the leaf tissues of plants. However, the molecular mechanism of anthocyanin biosynthesis and transport has not been satisfactorily elucidated in plants exposed to toxic B. Therefore, the changes in expression levels of some of the phenylpropanoid pathway genes, early and late flavonoid biosynthetic genes, and transcription factors related to anthocyanin biosynthesis and transport were determined in Arabidopsis thaliana under B toxicity.
11p tudichquannguyet 29-11-2021 10 1 Download
-
Microwave irradiation has been used to improve the one-pot synthesis of substituted 2-amino-4,6-diarylnicotinonitrile in the presence of boric acid as an efficient and green catalyst under solvent-free conditions within 48–60s. All the analogs that have not been reported previously were characterized by their melting points, IR, 1H NMR, and 13C NMR spectra. One of the structures was verified by the analysis of a single crystal. The reported synthetic procedure provided remarkable advantages such as short reaction times, excellent yield, facile workup, and the use of a green catalyst.
44p tudichquannguyet 29-11-2021 6 1 Download
-
Protic ionic liquids (PILs) were synthesized through a stoichiometric neutralization reaction between 2,2′ - (ethylenedioxy)-bis(ethylamine) { Edbea} and various acids (formic, acetic, boric, decanoic, and gentisic acid). The PILs were characterized by elemental analyses, FTIR, 1 H and 13 C NMR spectroscopy, and thermogravimetric analysis. All the PILs except PIL3 were liquid at room temperature. The viscosity of the PILs (PIL1, 2, 4, 5) was measured using a cone-and-plate viscometer at ambient temperature.
21p tudichquannguyet 29-11-2021 7 0 Download
-
The purpose of this study was to compare the adsorption behavior of cationic and anionic dyes onto a hexagonal boron nitride (hBN) nanostructure that was rich in a negative charge. Herein, the hBN nanostructure was synthesized using boric acid as a precursor material. The characteristic peaks of the hBN nanostructure were performed using Fourier transform infrared (FT-IR) and Raman spectroscopies. The morphology and the particle size of hBN nanostructure were determined by transmission electron microscopy (TEM) and scanning electron microscopy (SEM).
12p tudichquannguyet 29-11-2021 7 1 Download
-
In this study, boric acid (BA) is employed as a crosslinking agent to improve the characteristics of two commonly used polymeric films, ethyl cellulose (EC) and polyvinyl alcohol (PVA), for topical drug delivery applications. The developed films are characterized by FTIR spectroscopy and SEM analysis. The results show that the surfaces of the prepared films are even and transparent, except for the BA-modified EC sample. The initial cumulative release for erythromycin (EM) is found to be 0.30 and 0.36 mg/mL for EC and PVA films, which drops to 0.25 and 0.
10p tudichquannguyet 29-11-2021 6 1 Download
-
Boron oxide (B2 O3 ) is derived from dehydration of boric acid and is a colorless, semitransparent, crystalline compound that is moderately soluble in water. On the other hand, boron oxide is chemically hygroscopic. This gives the molecule the ability to soak up water and adhere to tissues. Boron oxide can be used locally after tumor debulking in inoperable tumors and especially when the tumor-free margin distance cannot be provided.
15p thiencuuchu 27-11-2021 8 1 Download
-
: Boron is a naturally occurring trace element found in organic and inorganic complexes. Boron-containing compounds are required for living organisms for diverse metabolic functions, including nitrogen fixation in microorganisms, cell wall stability in plants, and bone and carbohydrate metabolism in animals. The number of studies about the effect of boron in biological model systems is very limited; so far, there has been no study on the correlation between boron and amyloid-beta toxicity.
7p thiencuuchu 27-11-2021 6 1 Download