Journal articles: 'Boric acid production'

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Yakar Elbeyli, İffet, Abdullah Zahid Turan, and İ. Ersan Kalafatoğlu. "The electrochemical production of boric acid." Journal of Chemical Technology & Biotechnology 90, no. 10 (August 19, 2014): 1855–60. http://dx.doi.org/10.1002/jctb.4496.

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Pekarsky, Alexander, Sophia Mihalyi, Maximilian Weiss, Andreas Limbeck, and Oliver Spadiut. "Depletion of Boric Acid and Cobalt from Cultivation Media: Impact on Recombinant Protein Production with Komagataella phaffii." Bioengineering 7, no. 4 (December 13, 2020): 161. http://dx.doi.org/10.3390/bioengineering7040161.

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The REACH regulation stands for “Registration, Evaluation, Authorization and Restriction of Chemicals” and defines certain substances as harmful to human health and the environment. This urges manufacturers to adapt production processes. Boric acid and cobalt dichloride represent such harmful ingredients, but are commonly used in yeast cultivation media. The yeast Komagataella phaffii (Pichia pastoris) is an important host for heterologous protein production and compliance with the REACH regulation is desirable. Boric acid and cobalt dichloride are used as boron and cobalt sources, respectively. Boron and cobalt support growth and productivity and a number of cobalt-containing enzymes exist. Therefore, depletion of boric acid and cobalt dichloride could have various negative effects, but knowledge is currently scarce. Herein, we provide an insight into the impact of boric acid and cobalt depletion on recombinant protein production with K. phaffii and additionally show how different vessel materials affect cultivation media compositions through leaking elements. We found that boric acid could be substituted through boron leakiness from borosilicate glassware. Furthermore, depletion of boric acid and cobalt dichloride neither affected high cell density cultivation nor cell morphology and viability on methanol. However, final protein quality of three different industrially relevant enzymes was affected in various ways.

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Wahbeh, Bara, Tareq Abu Hamed, and Roni Kasher. "Hydrogen and boric acid production via boron hydrolysis." Renewable Energy 48 (December 2012): 10–15. http://dx.doi.org/10.1016/j.renene.2012.04.043.

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刘, 念. "Advances in the Production of Enriched Boric Acid." Nuclear Science and Technology 06, no. 02 (2018): 27–34. http://dx.doi.org/10.12677/nst.2018.62004.

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Zheng, Yong Jun, Ji Chang Zhang, and Hui Chao Lu. "Synthesis of n-Butyl Salicylate Catalyzed by Boric Acid." Advanced Materials Research 466-467 (February 2012): 319–22. http://dx.doi.org/10.4028/www.scientific.net/amr.466-467.319.

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Boric acid (H3BO3) was an inexpensive, efficient and mild catalyst for the synthesis of n-butyl salicylate from salicylic acid and n-butanol, the esterifcation process conditions were optimized, the experimental results showed that the new process used small amount of boric acid catalyst, got higher target product yield, thus reduced the cost of production.

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Pervez, Asim, Abdul Razzaq, Muhammad Shoaib Farooq, Abdul Basit, and Muhammad Saleem Akhtar. "Role of boric acid on economic seed production of alfalfa under climatic conditions of Sargodha." World Journal of Biology and Biotechnology 5, no. 1 (April 15, 2020): 37. http://dx.doi.org/10.33865/wjb.005.01.0293.

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Alfalfa is one of the most important forage crops worldwide because of its wide range of adaptability and good forage quality. Seed yield is generally considered to be of secondary importance and is characterized by often poor seed yield and seed quality. A field experiment was conducted to determine the impact of boric acid foliar applications along with a basal dose during anthesis to enhance the alfalfa seed yield in agro-ecological conditions of Sargodha. In foliar boric acid fertilization 0, 2, 4, 6, 8, 10 boric acid along with basal dose 23-80-50 (NPK kg ha-1) was used. Phosphorous and potash were applied at the time of sowing while nitrogen will be applied in two split doses; half at sowing time and half of 1st irrigation. Two foliar applications, 1st at intensive plant growth stage and the 2ndat the beginning of the blossoming of the crop. The concentration of boric acid solutions used were 2 ,4 , 6 ,8 and 10 glit-1 which produces a seed yield of 161.7, 167.9,171.3, 175.0,186.7 and 176.1 kg ha-1 in year 2015-16 while next year in 2016-17 produces a seed yield of 286.5, 299.2,304.6, 308.3, 312.1 and 310.1kg ha-1 respectively which is higher than year 2015-16. Foliar fertilization with boron influenced forming of slightly higher number of seeds in the pod. Boron influenced the average increase of yield, with a slightly greater difference compared to control. Number of seeds per pod in boric acid dose of 0, 2, 4, 6, 8 and 10 remained 6.1, 6.3, 6.4, 6.6, 6.8 and 6.7respectively in year 2016-17 which were higher than 4.3,4.4,4.5, 4.5,4.9 and 4.7 in year 2015-16. Overall 8 g liter-1 boric acid foliar fertilization produces 8.9 % higher seed yield, 11.4 % higher no of seeds per pod compared to control in the year 2016-17 while produces 15.4% higher seed yield and 13.9 % higher no of seeds per pod as compared to control in the year 2015-16.

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Sunaryo, Geni Rina. "Boric Acid Radiolysis in Primary Coolant Water of PWR at Temperature of 250oC." Jurnal Pengembangan Energi Nuklir 19, no. 1 (July 15, 2017): 11. http://dx.doi.org/10.17146/jpen.2017.19.1.3192.

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BORIC ACID RADIOLYSIS IN PRIMARY COOLANT WATER OF PWR AT TEMPERATURE OF 250oC. The existence of oxygen in the primary coolant system of PWR could lead to corrosion, hence it is very important to suppress the oxygen concentration in the system. Therefore, study of the effect of boric acid addition into the primary coolant water system of PWR to suppress oxygen concentration resulted from gamma-ray radiation is essential to be performed. The aim of this research is to understand reaction mechanism at temperature of 2500C and the effect of boric acid adding toward oxygen concentration in the PWR primary coolant water. Methodology used is simulation using Facsimile software. Input for the software namely radiolysis reaction mechanism for pure water, G value from radiolysis product, dose rate of 1 and 104 Gy/s, aeration and deaeration system, and specific reaction of boric acid with hydroxyl radical and hydrated electron at temperature 250C and 3000C. The output are in the form of irradiation time vs oxygen concentration time series. The results show that the oxygen production increase significantly with the irradiation time and reach the saturated concentration at 107s. Based on the plot of oxygen’s concentration at 107s vs boric acid, several results are as following: oxygen concentration significantly suppressed by boric acid addition and gives the exponential decreasement, the higher dose rate gives the higher concentration of oxygen, the aeration system gives no effect on suppressing oxygen concentration at boric acid addition up to 0.1M.

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Nakano, Octavio, Lucas Silva Barros, and Ana Caroline Amorim Krol. "EFFICIENCY OF BORIC ACID TO CONTROL PASTURE SPITTLEBUGS 𝘋𝘦𝘰𝘪𝘴 𝘧𝘭𝘢𝘷𝘰𝘱𝘪𝘤𝘵𝘢 AND 𝘕𝘰𝘵𝘰𝘻𝘶𝘭𝘪𝘢 𝘦𝘯𝘵𝘳𝘦𝘳𝘪𝘢𝘯𝘢 (HEMIPTERA: CERCOPIDAE)." BRAZILIAN JOURNAL OF AGRICULTURE - Revista de Agricultura 95, no. 1 (April 30, 2020): 59. http://dx.doi.org/10.37856/bja.v95i1.3978.

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The Urochloa spp. (sin. Brachiaria spp.) is an important grass cultivated in Brazil. However, the pasture spittlebugs pest attack can limited this forage plant supply and animal production. In search of alternative pest control methods, this research evaluated the boric acid efficiency to control spittlebugs Deois flavopicta and Notozulia entreriana (Hemiptera: Cercopidae). The experiment was carried out under completely randomized design with six treatments and four replications. The treatments were boric acid at concentrations of 0.1, 0.2 and 0.4% and insecticides permethrin 50 CE (0.005%) and imidacloprid 700 WG (0.02%). The number of surviving insects after pulverization of treatments to pasture spittlebugs pest control efficiency were performed. Boric acid at the concentration 0.4% showed 100% of efficiency to control spittlebugs D. flavopicta and N. entreriana species. Thus, boric acid at 0.4% can be used to integrated pest management programs of forage grasses.

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Duydu, Yalçın, Nurşen Başaran, and Hermann M. Bolt. "Exposure assessment of boron in Bandırma boric acid production plant." Journal of Trace Elements in Medicine and Biology 26, no. 2-3 (June 2012): 161–64. http://dx.doi.org/10.1016/j.jtemb.2012.03.008.

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Balbay, A., and Ö. Şahin. "Hydrogen Production from Sodium Borohydride in Boric Acid-water Mixtures." Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 36, no. 11 (April 4, 2014): 1166–74. http://dx.doi.org/10.1080/15567036.2011.618818.

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Balcı, Suna, Naime Aslı Sezgi, and Esin Eren. "Boron Oxide Production Kinetics Using Boric Acid as Raw Material." Industrial & Engineering Chemistry Research 51, no. 34 (August 20, 2012): 11091–96. http://dx.doi.org/10.1021/ie300685x.

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Hafez, Islam, and Mehdi Tajvidi. "Laminated Wallboard Panels Made with Cellulose Nanofibrils as a Binder: Production and Properties." Materials 13, no. 6 (March 13, 2020): 1303. http://dx.doi.org/10.3390/ma13061303.

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This study explored the development and characterization of laminated wallboard panels using renewable materials for building applications. The panels are based on cellulose nanofibrils (CNFs) as a binder and wood particles. Other additives included FiberLeanTM (microfibrillated cellulose/calcium carbonate composite), starch and fire retardant (boric acid/borax). These panels are also intended to address the environmental concerns of commercial gypsum boards. The manufacturing of the panels is via a wet-based process; hence no initial drying was required to remove the water from the CNF. It was found that the dosage of CNF (and/or FiberLeanTM) binder and the addition of starch had the largest impact upon the quality of the final product. The addition of starch was found more favorable in the presence of FiberLeanTM. The fire retardancy was induced by adding boric acid/borax (1:1). The burning test revealed that the panels treated with the fire retardant exhibited excellent burning properties comparable to that of gypsum board (inherently fire resistant). Interestingly, the addition of the boric acid/borax also appeared to increase the retention of starch in the system, leading to favorable mechanical properties.

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Listyanto, Tomy, Aditya Aji Pratama, Keisuke Ando, and Nobuaki Hattori. "Improving Fire Resistance of Mahogany (Swietenia macrophylla) Wood Impregnated with Mixture of Borax and Boric Acid." Wood Research Journal 11, no. 2 (January 26, 2021): 48–52. http://dx.doi.org/10.51850/wrj.2020.11.2.48-52.

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The study was aimed to investigate the effects of mixture of borax and boric acid concentration and different level of pressure on absorption, retention quantity, and fire resistance properties of mahogany (Swietenia macrophylla). A total of 50 samples of 9 x 19 x 1016 mm (ASTM E 69-02) were taken from mahoganylumber and then air-dried. A total of 45 samples were impregnated with aqueous solutions of borax and boric acid in three different concentrations (5, 7, and 9 %) and at three different pressure levels (5, 7.5, and 10 atm) for 2 hours pressure time, while5 samples were liftedas control. Dried impregnated samples and untreated samples were feeding in flame with lid combustion method refers to ASTM E 69-02. Interestingly, the results showed that borax and boric acid effectively improved the fire resistanceproperties(mass losses, ignition temperature, maximum temperature, and smoke and smolder production)of mahogany wood.Mixtures of borax and boric acid at a concentration level of 9% and pressure of 10 atm arerecommended to obtain the best results compare to the other interactions on combustion properties.

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Li, Hui, Xin-Xin Ma, Zhong-Chun Gu, Xiao Wang, Jun-Zhang Li, Jun Jiang, Ben-Hua Fei, and Zhi-Bin Yang. "Pyrolysis and combustion characteristics of boric acid and borax treated decorative bamboo filaments." BioResources 15, no. 4 (September 9, 2020): 8146–60. http://dx.doi.org/10.15376/biores.15.4.8146-8160.

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A cone calorimeter and thermogravimetric analysis were used in this work to determine the combustion and pyrolysis characteristics of decorative bamboo filaments before and after being treated with boric acid and borax (1:1) flame-retardants. The kinetics were calculated using the Coates-Redfern model. The results showed that in comparison to the control sample, the flame combustion time decreased from 52 s to 40 s, and the peak value of the heat release rate (PKHRR) and total heat release (THR) of the boric acid and borax treated samples were significantly decreased, by 21.0% and 22.2%, respectively. The peak value of the smoke release rate (PKSPR), total smoke production (TSP), and the specific extinction area (ASEA) were reduced substantially, by 90.6%, 93.3%, and 93.0%, respectively. After the boric acid and borax (1 to 1 ratio) flame retardant treatment, the pyrolysis range, the mass loss, the maximum mass loss rate, and the corresponding peak temperature of the samples all significantly decreased with the same heating rate. The activation energy of the BB-treated samples was higher than the control group, which indicated the boric acid and borax flame retardant had flame retardant efficiency.

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Lenzi, Alessandro, Marco Paci, Geoffrey Giudetti, and Roberto Gambini. "Tracing Ancient Carbon Dioxide Emission in the Larderello Area by Means of Historical Boric Acid Production Data." Energies 14, no. 14 (July 7, 2021): 4101. http://dx.doi.org/10.3390/en14144101.

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The impact of natural CO2 emissions in the development of geothermal areas is presently gaining more attention than ever before. In Italian geothermal fields, a reduction in the natural CO2 emissions has been observed. This paper reviews and provides an analysis of the historical production data of boric acid from 1818 to 1867 used to calculate the natural emissions of CO2 associated with boric acid production that pre-dates the use of geothermal resources for power production, which started in 1913. Boric acid was already being extracted from the natural geothermal fluids in geysers and natural ponds emitting steam and gases. After 1827 the ‘lagone coperto’ (covered lake) equipment optimized production, and the drilling of shallow wells (20–30 m) starting in 1836, which further increased the quantity of its extraction. The first geothermal reservoir was developed at the turn of the century and the Larderello geothermal field began to grow. The use of deep wells, keeping pace with the power production, led to the gradual disappearance of the natural ponds and the ‘lagoni’ (lakes) in the historical area, so the residual natural emission of CO2 is presently restricted to diffuse soil emission. Comparisons of the ancient CO2 emissions with those of the Geothermal Power Plant (GPP) in the Larderello area show that both amounts are in the same order of magnitude, suggesting a balance between the depletion of natural emissions and geothermal activity.

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Davies, T. W., S. Çolak, and R. M. Hooper. "Boric acid production by the calcination and leaching of powdered colemanite." Powder Technology 65, no. 1-3 (March 1991): 433–40. http://dx.doi.org/10.1016/0032-5910(91)80204-v.

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Gönen, Mehmet, Emmanuel Nyankson, and Ram B. Gupta. "Boric Acid Production from Colemanite Together with ex Situ CO2 Sequestration." Industrial & Engineering Chemistry Research 55, no. 17 (April 22, 2016): 5116–24. http://dx.doi.org/10.1021/acs.iecr.6b00378.

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Lim, Byung-Chul, Hye-Jung Kim, and Deok-Kun Oh. "High Production of d-Tagatose by the Addition of Boric Acid." Biotechnology Progress 23, no. 4 (2007): 824–28. http://dx.doi.org/10.1002/bp070056y.

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Elbeyli, İffet Yakar. "Production of crystalline boric acid and sodium citrate from borax decahydrate." Hydrometallurgy 158 (December 2015): 19–26. http://dx.doi.org/10.1016/j.hydromet.2015.09.022.

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Yalçın, Ali, and Mehmet Gönen. "A novel approach for the production of zinc borate (4ZnO·B2O3·H2O) using a single-step hydrothermal method." Main Group Metal Chemistry 44, no. 1 (January 1, 2021): 1–8. http://dx.doi.org/10.1515/mgmc-2021-0001.

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Abstract Zinc borate having the formula of 4ZnO·B2O3·H2O has been used as a fire retardant for polymers requiring high processing temperatures since it has a high dehydration temperature (around 415°C). The effects of reaction time, reaction temperature were investigated on the heterogeneous reaction between solid zinc oxide and boric acid solution. A stoichiometric amount of zinc oxide and 5.0% excess boric acid were used in experiments and the other parameters, mixing speed (1700 rpm), the solid-liquid ratio of 20%, and the amount of seed crystal (3.9% wt) were kept constant for all experiments. A 91.1% conversion was obtained at 120°C for 5 h of reaction time. Precipitated product was filtered and washed by hot water to remove the excess boric acid. Finally it was dried until reaching to a constant mass in an air circulating oven at 105°C. Powder products were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). FTIR spectrum and XRD pattern of powders are consistent with data of the zinc borate given in the literature. According to SEM analysis, whiskers are less than 1 μm in diameter and their lengths are in the range of 1–10 μm.

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Flores, Rilner Alves, Patrícia Pinheiro da Cunha, Virgínia Damin, Klaus de Oliveira Abdala, Deyvid Diego Carvalho Maranhão, Marivone Moreira dos Santos, and Raissa Alves Rodrigues. "Physiological quality and grain production of Phaseolus vulgaris (cv. BRS Pérola) using boron (B) application under irrigatation system." APRIL 2019 13, (04) 2019 (April 20, 2019): 520–28. http://dx.doi.org/10.21475/ajcs.19.13.04.p1383.

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Some aspects of the micronutrients management in common bean under boron fertilization in tropical agroecosystems are still poorly understood. The aim of this work was to evaluate the physiological quality and grain production of common bean using different B sources and dose applications, cultivated under irrigated system. The experimental design was a randomized block, in a factorial scheme 2 x 5 x 3, with two sources of B (boric acid containing 17% of B applied in leaves and FTE (fritted trace elements) and BR-12 including 1.8% of B, applied on the soil) with five doses of each source: 0 (control), 2, 4, 6 and 8 kg ha-1, with three repetitions. Each plot had a total area of 5.06 m2 (2.25m x 2.25m). The stomatal conductance and transpiration were reduced by increasing B doses, mainly when boric acid was used. Results showed that application of boric acid at 8 kg ha-1 of B reduced grain production about 21%. However, application of 6 kg ha-1 FTE BR 12 on the soil promoted grain production. However, application of 6 kg ha-1 of B using FTE (fritted trace elements) BR-12 as a source on the soil, promoted higher production and differential profit (618 US$ ha-1). Therefore, these sources and doses are recommended to common beans under irrigation systems in Brazilian Savanna agroecosystems.

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ZareNezhad, Bahman. "Production of Crystalline Boric Acid through the Reaction of Colemanite Particles with Propionic Acid." Developments in Chemical Engineering and Mineral Processing 11, no. 3-4 (May 15, 2008): 363–80. http://dx.doi.org/10.1002/apj.5500110412.

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Lavanya, V., Udaykumar Nidoni, B. Kisan, H. Amarananjundeshwara, and V. Ramya. "Physiological characterization of Jasmine flower (Jasminum sambac) senescence during storage." Journal of Applied and Natural Science 8, no. 3 (September 1, 2016): 1475–78. http://dx.doi.org/10.31018/jans.v8i3.986.

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The aim of this work was to identify metabolic differences and hormonal profiles in jasmine flower (Jasminum sambac) and to investigate the possibility that experimental promotion of retardation of the senescence of jasmine flower may mediated by abscisic acid (ABA) and phenolic content. Determinations of ABA and phenols were made in flower senescing under different conditions using two different packaging materials such as polyethylene (PE) and polypropylene (PP) of 200 gauge micron thickness with no ventilation. Pre-treatment of 4 % boric acid for jasmine flowers was selected. Abscisic acid levels in petals also increased during senescence 91.27 pmol g-1, but much less in boric acid-treated jasmine flower 34.16 pmol g-1. However, the lowest content of total phenolics was measured in buds and partially opened flowers 50.90 Î¼g/g but highest in fully opened 61.80 Î¼g/g on the fourth day of storage, respectively. It was concluded that boric acid prevented the early rise in ethylene production and considerably improved jasmine flower shelf-life.

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Bueno, Amanda Magalhães, Aline Fanciel de Andrade, Aline dos Santos de Carvalho, Rilner Alves Flores, Klaus de Oliveira Abdala, Glenio Guimarães Santos, and Marcio Mesquita. "Yield and physiological quality of common bean grains as a function of boron application in the soil." June 2021, no. 15(06):2021 (June 10, 2021): 909–17. http://dx.doi.org/10.21475/ajcs.21.15.06.p3136.

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We carried out a field experiment to evaluate the effects of soil application of sources and doses of boron (B) on production yield and quality of grains of Phaseolus vulgaris (BRS Estilo) grown in an irrigated system. The factorial design was 4x5, being four sources of boron (boric acid, borax, borogran, and FTE BR12) and five doses (0, 1, 2, 3, and 4 kg ha-1) (three replications). We evaluated relative chlorophyll index (RCI), leaf B content, yield, seed viability, and economic value. The data were subjected to analysis of variance, and when significant, evaluated by Tukey test (qualitative) and regression (quantitative). Boron sources affected the RCI 28 days after emergence (DAE). The results for boric acid, borogran, and FTE BR12 were significantly higher (3%, p-value<0.05) than the results for borax. At 46 DAE, boric acid resulted in a RCI 5% higher than the other sources. Borax and boric acid promoted high leaf B contents (126.11 and 105.63 mg dm-3, respectively). The maximum yield (2,224.03 kg ha-1) was obtained by using 2.21 kg ha-1 of B, regardless of the source. Seed viability showed a linear behavior by using borax and boric acid and a quadratic behavior by using borogran and FTE BR12. The dose that resulted in the highest differential profit return (US$ 398.00) was 3.00 kg ha-1. Based on the productive, physiological, and economic results, the dose of 3.00 kg ha-1 provides the highest profit margin for common bean producers

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Kolosova, Anastasiya, Maria Sokolskaya, Evgeniy Pikalov, and Oleg Selivanov. "Production of facing ceramic material using cullet." E3S Web of Conferences 91 (2019): 02003. http://dx.doi.org/10.1051/e3sconf/20199102003.

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The research presents experimental results concerning the charge composition development for ceramics, used for cladding facades and basements of buildings and structures. The given composition is suggested to be based on the low plasticity clay as a basic component, which cannot be used to produce crackless, durable and frost resistant ceramics without introducing functional additives. The following functional additives were applied in the conducted experiments: boric acid, used as a fuse for the reduction of liquid phase sintering temperature and the increase of vitreous phase amount; various empties cullet, used as a fluxing and strengthening additive, which is the source of vitreous phase, forming the rigid frame of interconnected ceramic particles through a layer of vitreous phase. The research experiments stated that the highest compressive strength and frost resistance and the least water absorption can be achieved when 30 wt. % of colorless empties cullet and 2,5 wt.% of boric acid are introduced into the charge. Besides the research demonstrates the results of determining the dependence of bending strength, density, thermal conductivity, open and total porosity. The developed charge composition on the one hand stipulates the solution environmental and technical-economic problems of natural resources rational use and waste management, and on the other hand allows producing high quality facing ceramic products at a reduced cost and using low demand resources.

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Nascimento, Carlos Antonio Costa do, Godofredo Cesar Vitti, Letícia de Abreu Faria, Pedro Henrique Cerqueira Luz, and Fernanda Latanze Mendes. "Ammonia volatilization from coated urea forms." Revista Brasileira de Ciência do Solo 37, no. 4 (August 2013): 1057–63. http://dx.doi.org/10.1590/s0100-06832013000400022.

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Nitrogen fertilization is a major component of the cost of agricultural production, due to the high cost and low efficiency of fertilizers. In the case of urea, the low efficiency is mainly due to losses by volatilization, which are more pronounced in cultivation systems in which plant residues are left on the soil. The objective of this work was to compare the influence of urea coated with sulfur or boric acid and copper sulfate with conventional N fertilizers on N volatilization losses in sugar cane harvested after stubble burning. The sources urea, sulfur-coated urea, urea coated with boric acid and copper sulfate, as well as nitrate and ammonium sulfate, were tested at amounts containing N rates of 120 kg ha-1 N. The integration of new technologies in urea fertilization can reduce N losses by volatilization. These losses were most reduced when using nitrate and ammonium sulfate. The application of a readily acidified substance (boric acid) to urea was more efficient in reducing volatilization losses and nutrient removal by sugar cane than that of a substance with gradual acidification (elemental sulfur).

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Bulutcu, A. N., C. O. Ertekin, and M. B. Kuskay Celikoyan. "Impurity control in the production of boric acid from colemanite in the presence of propionic acid." Chemical Engineering and Processing: Process Intensification 47, no. 12 (November 2008): 2270–74. http://dx.doi.org/10.1016/j.cep.2007.12.012.

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Kuskay, B., and A. N. Bulutcu. "Design parameters of boric acid production process from colemanite ore in the presence of propionic acid." Chemical Engineering and Processing: Process Intensification 50, no. 4 (April 2011): 377–83. http://dx.doi.org/10.1016/j.cep.2011.02.013.

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An, Jing, and Xiangxin Xue. "Life cycle environmental impact assessment of borax and boric acid production in China." Journal of Cleaner Production 66 (March 2014): 121–27. http://dx.doi.org/10.1016/j.jclepro.2013.10.020.

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Gunduz, Oguzhan, L. S. Ozyegin, Sergey V. Dorozhkin, Onur Meydanoglu, Niyazi Eruslu, S. Kayali, Simeon Agathopoulos, and Faik N. Oktar. "Bovine Hydroxyapatite (BHA) Boron Oxide Composites." Key Engineering Materials 396-398 (October 2008): 403–6. http://dx.doi.org/10.4028/www.scientific.net/kem.396-398.403.

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Composites of calcinated bovine bone derived hydroxyapatite (HA) with 5, 7.5 and 10 wt % B2O3 were prepared by sintering. The production of HA from natural sources is preferred due to economical and time saving reasons. In this study scanning electron microscopy (SEM) investigations, microhardness and compression strength measurements were performed on composites. The experimental results indicated that compression strength and microhardness of HA-boron-oxide composites decrease when the content of boric acid and sintering temperature increase. The best mechanical properties achieved for 5 wt % addition of dehydrated boric acid. It was seen that at higher sintering temperatures, the compression strength and the microhardness decrease due to the very intensive pore formation. The results agree fairly well with microstructure analysis.

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Pavlycheva, E. A., E. S. Pikalov, and O. G. Selivanov. "Recovery of Polymer Waste in the Production of Ceramics Veneer with a Self-glazing Effect." Ecology and Industry of Russia 25, no. 6 (June 22, 2021): 20–25. http://dx.doi.org/10.18412/1816-0395-2021-6-20-25.

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The results of studies on the development of the composition of the charge based on low-plasticity clay using waste products from the consumption of products made of unplasticized polyvinyl chloride are presented. In addition, boric acid as a flux and titanium dioxide as a source of the vitreous phase are introduced into the composition of the charge to obtain the effects of vitrification of the surface of ceramic particles and self-glazing of the surface of the samples. The dependences of the main properties of ceramics veneer on the ratio between the amounts of polymer waste and titanium dioxide with the introduction of 5% by weight of boric acid have been established. The quantities of charge components that ensure the energy efficiency of the developed ceramics while ensuring strength, water absorption and frost resistance at a level corresponding to the requirements for products for brick cladding of buildings and structures have been determined. The use of this composition expands the range and raw material base for the production of ceramics veneer, allow you to dispose of polymer waste at any degree of purity and destruction in sufficiently large quantities.

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Yildirim, Mert, and Zeki Candan. "Performance properties of particleboard panels modified with nanocellulose/boric acid." BioResources 16, no. 1 (January 26, 2021): 1875–90. http://dx.doi.org/10.15376/biores.16.1.1875-1890.

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The physical and mechanical properties of particleboard panels were evaluated relative to various loading levels of nanocellulose (NC) and boric acid (BA) in the urea-formaldehyde (UF) resin used for panel production. The results showed that NC and BA reinforcement substantially affected the performance properties of the particleboard panels. It was determined that using 3% NC and 3% BA in the panels afforded the best results relative to thickness swelling (TS), water absorption (WA), moisture content (MC), modulus of rupture (MOR), modulus of elasticity (MOE), and internal bonding strength (IB). It was concluded that the performance properties of the particleboard panels could be enhanced by adjusting the loading levels of NC and BA. The study also showed that it is possible to apply NC and BA as modifiers for the formaldehyde resin in the process of manufacturing particleboard panels. The NC and BA reinforcement techniques could be used to develop novel furniture components and interior design materials.

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Taylan, N., H. Gürbüz, and A. N. Bulutcu. "Effects of ultrasound on the reaction step of boric acid production process from colemanite." Ultrasonics Sonochemistry 14, no. 5 (July 2007): 633–38. http://dx.doi.org/10.1016/j.ultsonch.2006.11.001.

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Kostić, Života G., Predrag Lj Stefanović, Pavle B. Pavlović, Dejan B. Cvetinović, and Slobodan Đ. Šikmanović. "Optimal plasma process routes for boron nitride (BN) powder production from boric acid (H3BO3)." Ceramics International 26, no. 2 (March 2000): 165–70. http://dx.doi.org/10.1016/s0272-8842(99)00036-x.

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Lai, Tongfei, Ying Wang, Xuelian Bai, Qinqin Qi, Maojun Xu, and Ting Zhou. "Dissecting inhibitory effect of boric acid on virulence and patulin production of Penicillium expansum." Postharvest Biology and Technology 117 (July 2016): 187–96. http://dx.doi.org/10.1016/j.postharvbio.2016.03.003.

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Zare Nezhad, B., M. Manteghian, and N. S. Tavare. "On the confluence of dissolution, reaction and precipitation: The case of boric acid production." Chemical Engineering Science 51, no. 11 (June 1996): 2547–52. http://dx.doi.org/10.1016/0009-2509(96)00112-1.

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Marušáková, Daniela, Pavel Kůs, Lorant Szatmary, and Iveta Adéla Prokůpková. "Influence of Boric Acid Solution and Gamma Irradiation on Selective Sorbents." Defect and Diffusion Forum 405 (November 2020): 193–98. http://dx.doi.org/10.4028/www.scientific.net/ddf.405.193.

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We tested stability of 43 selective sorbents, covering the widest range of functional groups, efficiency of sorption, method of production, and which are theoretically useful for sorption of cesium, strontium, cobalt, arsenic and actinoids. We present 3 of them: A = TiO2, B = Al2O3 and C = MxH(TiO)4(SiO4)3 . z H2O. In first testing, sorbents were exposed to the model solution of boric acid for 168 hours, in which they were mixed in a closed container with a rotator. After the exposure, sorbent solutions were filtered and analysed by spectroscopic techniques (Infrared Spectroscopy (IR), Raman Spectroscopy (RS) and newly by Scanning Electron Microscopy (SEM), combined with Energy Dispersive Spectroscopy (EDS)). Exposed spectra were compared with spectra of new, non-exposed sorbents. In second testing, sorbents were exposed to gamma radiation for 12 days with total dose 666 ± 43 kGy, produced by cobalt bomb and analysed by same techniques. The aim of our testing was to find out how sorbents behave in model boric acid solution and what effect has the gamma radiation on sorbent spectra and to analyse sorbents by SEM with EDX.

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Jia, Peng. "Research on Critical Cut Depth of Glass BK7 in Diamond Cutting." Materials Science Forum 770 (October 2013): 230–33. http://dx.doi.org/10.4028/www.scientific.net/msf.770.230.

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In diamond cutting of optical glasses, the magnitude of critical depth of cut for brittle-ductile transition is an important factor affecting the machinability of the work material in terms of production rate and surface quality. In this work, scratching tests with increasing depths of cut were conducted on glass BK7 to evaluate the influence of the cutting fluid properties on the critical depth of cut. Boric acid solutions of different concentrations were selected as cutting fluids in the tests. The resulting scratches were examined utilizing a white light interferometer and the values of the critical depth of cut were determined based on the observations of the micro-morphology of the scratch surfaces produced. Experimental results indicated that compared with the process without cutting fluid action, the critical depth of cut in diamond cutting of glass BK7 can be increased by using boric acid solution as the cutting fluid.

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Jia, Peng. "Influence of Cutting Compound on Critical Cut Depth of Glass BK7." Key Engineering Materials 579-580 (September 2013): 97–100. http://dx.doi.org/10.4028/www.scientific.net/kem.579-580.97.

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In diamond cutting of optical glasses, the magnitude of critical depth of cut for brittle-ductile transition is an important factor affecting the machinability of the work material in terms of production rate and surface quality. In this work, scratching tests with increasing depths of cut were conducted on glass BK7 to evaluate the influence of the cutting fluid properties on the critical depth of cut. Boric acid solutions of different concentrations were selected as cutting fluids in the tests. The resulting scratches were examined utilizing a white light interferometer and the values of the critical depth of cut were determined based on the observations of the micro-morphology of the scratch surfaces produced. Experimental results indicated that compared with the process without cutting fluid action, the critical depth of cut in diamond cutting of glass BK7 can be increased by using boric acid solution as the cutting fluid.

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Jia, Peng. "Indentation and Scratching Experimental Research on Brittle-Ductile Transition of Optical Glass SF6." Key Engineering Materials 589-590 (October 2013): 480–84. http://dx.doi.org/10.4028/www.scientific.net/kem.589-590.480.

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In diamond cutting of optical glasses, the magnitude of critical depth of cut for brittle-ductile transition is an important factor affecting the machinability of the work material in terms of production rate and surface quality. In this work, scratching tests with increasing depths of cut were conducted on glass BK7 to evaluate the influence of the cutting fluid properties on the critical depth of cut. Boric acid solutions of different concentrations were selected as cutting fluids in the tests. The resulting scratches were examined utilizing a white light interferometer and the values of the critical depth of cut were determined based on the observations of the micro-morphology of the scratch surfaces produced. Experimental results indicated that compared with the process without cutting fluid action, the critical depth of cut in diamond cutting of glass BK7 can be increased by using boric acid solution as the cutting fluid.

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Zhou, Ming, Peng Jia, and Min Li. "Research on the Influence of Cutting Fluids on the Critical Depth of Cut in Diamond Cutting of Optical Glass BK7." Key Engineering Materials 431-432 (March 2010): 126–29. http://dx.doi.org/10.4028/www.scientific.net/kem.431-432.126.

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In diamond cutting of optical glasses, the magnitude of critical depth of cut for brittle-ductile transition is an important factor affecting the machinability of the work material in terms of production rate and surface quality. In this work, scratching tests with increasing depths of cut were conducted on glass BK7 to evaluate the influence of the cutting fluid properties on the critical depth of cut. Boric acid solutions of different concentrations were selected as cutting fluids in the tests. The resulting scratches were examined utilizing a white light interferometer and the values of the critical depth of cut were determined based on the observations of the micro-morphology of the scratch surfaces produced. Experimental results indicated that compared with the process without cutting fluid action, the critical depth of cut in diamond cutting of glass BK7 can be increased by using boric acid solution as the cutting fluid.

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Hare, Robert C. "Increase Longleaf Pine Seed Yields by Inhibiting Conelet Abortion." Southern Journal of Applied Forestry 11, no. 1 (February 1, 1987): 6–9. http://dx.doi.org/10.1093/sjaf/11.1.6.

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Abstract A single foliar spray with either antiethylene compounds or cytokinins shortly after anthesis reduced conelet abortion by half and doubled seed production. Spraying with boric acid plus Cytex® , a relatively economical form of cytokinin derived from seaweed, was equally effective,and addition of certain antiethylene compounds further improved seed yield. South. J. Appl. For. 11(1):6-9.

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Vitkalova, Irina, Anastasiya Torlova, Evgeniy Pikalov, and Oleg Selivanov. "Development of environmentally safe acid-resistant ceramics using heavy metals containing waste." MATEC Web of Conferences 193 (2018): 03035. http://dx.doi.org/10.1051/matecconf/201819303035.

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The paper presents research results concerning charge composition development to produce environmentally safe acid-resistant ceramics on the basis of low-plastic clay of the Vladimir region possessing self-glazing effect. 5 wt. % boric acid, 5 wt. % lanthanum oxide and up to 5 wt. % electroplating sludge have been introduced into the charge composition as functional additives. Boric acid serves as a flux and a source acid-resistant and heat-resistant vitreous phase based on borosilicates, but compositions contained in the electroplating sludge are decomposed in the process of ceramics firing causing the formation of calcium oxide and heavy metal oxides, which additionally increase material acid-resistance and heat-resistance like lanthanum oxide. To receive the developed material, semidry pressing technology has been applied under the charge forming moisture of 8 wt. %, specific pressure of 15 МPа and one-stage firing at max temperature of 1050 °C. The research presents the testing results of ceramics principal operating properties and environmental safety. The developed material can be used in clinker and acid-resistant bricks and tiles production for masonry and tiling in aggressive environment like buildings foundations and bases, premises with high moisture, as well as in sewerage systems, chimneys and ventilation ducts.

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ZareNezhad, Bahman. "Direct production of crystalline boric acid through heterogeneous reaction of solid borax with propionic acid: Operation and simulation." Korean Journal of Chemical Engineering 21, no. 5 (September 2004): 956–62. http://dx.doi.org/10.1007/bf02705577.

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Başpınar, M. Serhat, Erhan Kahraman, Gökhan Görhan, and İsmail Demir. "Production of fired construction brick from high sulfate-containing fly ash with boric acid addition." Waste Management & Research 28, no. 1 (May 7, 2009): 4–10. http://dx.doi.org/10.1177/0734242x08096529.

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Wang, Qi, Guo Zheng, Jian Jie Ai, and Xue Jing Wei. "Study on the Hydrolytic Stability of Borate Ester." Applied Mechanics and Materials 84-85 (August 2011): 499–503. http://dx.doi.org/10.4028/www.scientific.net/amm.84-85.499.

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In this paper, borate ester had been synthesized by the raw materials glycerol and boric acid. The hydrolytic stability of borate ester was made in-depth study by Karl Fischer trace water analyzer. The result shows that the method was simple and accurate. It not only determined the hydrolytic stability of borate ester, but also quantified the extent of its hydrolysis which had important significance in actual production.

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Chander, Subhash, Rajasekharan P.E., and Reju M. Kurian. "Pollen storage studies in sugar apple (Annona squamosa L.) cv. Balanagar." Israel Journal of Plant Sciences 66, no. 3-4 (August 27, 2019): 196–202. http://dx.doi.org/10.1163/22238980-20191080.

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Annona cv. ‘Arka Sahan’ essentially needs assisted pollination with sugar apple pollen for commercial fruit production. However, there is no perfect synchronization in flowering of the pollen source sugar apple cv. Balanagar with that of cv. ‘Arka Sahan’. So, an attempt was made to store the pollen of the former to assure its availability as and when cv. ‘Arka Sahan’ flowers need to be pollinated. In vitro pollen germination was assessed using different concentrations of sucrose (5%, 10% and 15%) with and without boric acid (100 ppm). Pollen collected on the second day of anthesis showed maximum germination (43.47%) in 5% sucrose + 100 ppm boric acid while those collected on first day of anthesis did not show any germination. Pollen collected at different times of the day showed a rapid decrease in pollen germination from maximum germination at 6 am (36.55%) to no germination at 2 pm. The maximum pollen germination was in 10% sucrose + 100 ppm boric acid combination for the stored pollen as well as pollen collected during late hours of the day. Pollen stored under varying temperatures lost viability within 1 month at 4°C while pollen stored at −196°C in liquid nitrogen retained germination for 2 months. Pollen germination and pollen tube growth were progressively reduced with storage time. Structure of stored pollen examined using Scanning Electron Microscope (SEM), revealed deformed and shriveled pollen structure. The results of this study indicated that the Annona pollen tends to be viable for a period of 2 months.

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ZareNezhad, Bahman. "Experimental and theoretical investigation of boric acid production through reactive dissolution of oxalic acid crystals in borax aqueous solution." Korean Journal of Chemical Engineering 20, no. 1 (January 2003): 44–47. http://dx.doi.org/10.1007/bf02697183.

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Жерновая, Natalya Zhernovaya, Онищук, Viktor Onishchuk, Скурятина, Elena Skuryatina, Затаковая, and Raisa Zatakovaya. "FEASIBILITY STUDY ON USE OF COLEMANITE IN THE TECHNOLOGY OF FLOAT GLASS." Bulletin of Belgorod State Technological University named after. V. G. Shukhov 1, no. 12 (November 11, 2016): 200–205. http://dx.doi.org/10.12737/22804.

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Currently actively formed market of translucent constructions. Manufacturers seek to physico-chemical improvement, technological and operational properties of sheet glass by changing their composition, as well as expand the resource base. Much attention is paid borosilicate glass, large-scale production which has a number of drawbacks: high cost and scarcity of traditional raw material of boron – borax, boric acid, high volatility of boron oxide. Alternative boron-containing material is colemanite – water calcium borate.

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El-Hoseiny, Hanan M., Mohamed N. Helaly, Nabil I. Elsheery, and Shamel M. Alam-Eldein. "Humic Acid and Boron to Minimize the Incidence of Alternate Bearing and Improve the Productivity and Fruit Quality of Mango Trees." HortScience 55, no. 7 (July 2020): 1026–37. http://dx.doi.org/10.21273/hortsci15053-20.

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Mango production faces several challenges, such as nutrient deficiency, physiological stress, and alternate bearing, which eventually affect tree productivity. This study was carried out during the 2017 and 2018 seasons to evaluate the effect of single and combined applications of humic acid (as potassium humate; 0.15%, 0.30%, 0.45%) and boron (as boric acid; 300, 600 mg·L−1) on ‘Zebda’ mango trees grown at Dir AlMalak region, Sharkeya Governorate, Egypt. Foliar spray was applied twice before flowering (first week of January and first week of February), and a third spray was applied by the beginning of flowering (first week of March) in both seasons. Humic acid and boron effectively enhanced tree growth, flowering, yield, and fruit quality. Humic acid was more effective than boron in this respect. Combined application of both materials surpassed the single application of each material on overall tree physiology and annual productivity. The observed results may be a consequence of the increase in tree photosynthetic pigments, nutrients, organic solutes, and phytohormones such as auxins, gibberellins, and cytokinins. The reduction in abscisic acid content may be related to the role of humic acid and boron protecting the plant against destructive oxidative reactions; improving the ability of the trees to withstand environmental stresses; thereby reduce floral malformation percentage, minimize the incidence of alternate bearing, and improve annual tree productivity and fruit quality. The most pronounced effect in this regard was noted with the application of 0.30% humic acid + 600 mg·L−1 boric acid.

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Journal articles on the topic 'Boric acid production'

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