Introduction: basic concept of boron and its physical and chemical properties

Zhu, Yinghuai; Cai, Jianghong; Hosmane, Narayan S.; Zhang, Yingjun

doi:10.1016/b978-0-12-822127-3.00003-x

Cited by 13 publications

(11 citation statements)

References 162 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These bacteria need B for the biosynthesis of AI-2B, and the MoA that we proposed for NOB complexes could explain why these complexes ensure absorption of neutrons and gamma-radiation when they reach the colon [ 138 , 168 , 169 ]. Additionally, in areas where the natural radiation of the soil is increased, the concentration of B in the blood of animals and humans is very low because B in the body is consumed by natural radiation from the environment and transformed into lithium and helium, but only the 10 B isotope conducts the reaction [ 174 , 175 , 176 ]. In these areas, people have very advanced OA (over 70%) [ 177 , 178 , 179 , 180 ].…”

Section: Discussionmentioning

confidence: 99%

New Insights into Boron Essentiality in Humans and Animals

Biță

Scorei²,

Bălşeanu

et al. 2022

IJMS

View full text Add to dashboard Cite

Boron (B) is considered a prebiotic chemical element with a role in both the origin and evolution of life, as well as an essential micronutrient for some bacteria, plants, fungi, and algae. B has beneficial effects on the biological functions of humans and animals, such as reproduction, growth, calcium metabolism, bone formation, energy metabolism, immunity, and brain function. Naturally organic B (NOB) species may become promising novel prebiotic candidates. NOB-containing compounds have been shown to be essential for the symbiosis between organisms from different kingdoms. New insights into the key role of NOB species in the symbiosis between human/animal hosts and their microbiota will influence the use of natural B-based colon-targeting nutraceuticals. The mechanism of action (MoA) of NOB species is related to the B signaling molecule (autoinducer-2-borate (AI-2B)) as well as the fortification of the colonic mucus gel layer with NOB species from B-rich prebiotic diets. Both the microbiota and the colonic mucus gel layer can become NOB targets. This paper reviews the evidence supporting the essentiality of the NOB species in the symbiosis between the microbiota and the human/animal hosts, with the stated aim of highlighting the MoA and targets of these species.

show abstract

Section: Discussionmentioning

confidence: 99%

New Insights into Boron Essentiality in Humans and Animals

Biță

Scorei²,

Bălşeanu

et al. 2022

IJMS

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…Boron has shown high promise as a fuel additive for propulsion and energetic applications due to its high gravimetric (58 kJ/g) and volumetric (140 kJ/mL) enthalpies of oxidation. − Its ignition performance, however, is hindered by the presence of a native oxide on the surface, which melts at relatively low temperatures (450 °C at atmospheric pressure). − The melting of the oxide shell before the solid core clogs the pores leads to particle agglomeration and acts as a diffusion barrier to the incoming oxidizer, thus delaying the boron (B) oxidation. , Attempts to overcome these limitations include surface functionalization of B by organic compounds, − reduction of the oxide, followed by surface passivation using nonthermal plasma processing, and coating with metals to form composites and metal borides by ball milling and high-temperature sintering methods. − Functionalization with organic compounds results in the reduction of the amount of energy released per unit mass due to the presence of less energetic materials on the B surface. Nonthermal plasma processing has been shown to be successful in enhancing the energetic performance over untreated boron but requires low-pressure equipment that is harder to scale-up.…”

Section: Introductionmentioning

confidence: 99%

Nanoenergetic Materials: Enhanced Energy Release from Boron by Aluminum Nanoparticle Addition

Agarwal

Matsoukas

2022

ACS Omega

View full text Add to dashboard Cite

Boron has the highest enthalpy of oxidation per unit mass (and volume) among metals and metalloids and is an excellent candidate as a solid fuel. However, the native oxide present on the surface limits the available energy and rate of its release during oxidation. Here, we report a simple and effective method that removes the oxide in situ during oxidation via an exothermic thermite reaction with aluminum that enriches the particle in B at the expense of Al. B/Al blends with different compositions are optimized using thermogravimetry and differential scanning calorimetry, and the best sample in terms of energy release is characterized by high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, energy-dispersive spectroscopy, and X-ray diffraction. All compositions release more energy than the individual components, and the blend containing 10% Al by weight outperforms pure B by 40%. The high energy release is due to the synergistic effect of B oxidation and thermite reaction between Al and B 2 O 3 . We demonstrate the formation of ternary oxide by the oxidation of the B/Al blend that provides porous channels for the oxidation of B, thereby maximizing the contact of the metal and oxidizer. Overall, the results demonstrate the potential of using B/Al blends to improve the energetic performance of B.

show abstract

“…To this end, carbon-based homocyclic agents offer a relatively limited degree of tuneability due the intrinsic electronic properties of the carbon element. In contrast, boron 21–26 and phosphorus 27–31 heterocycles captivate due to their unique and wide regioselective chemistry ( vide infra ). This results in major advantages for rational drug design, which can selectively be attributed to either boron or phosphorus atom.…”

Section: Introductionmentioning

confidence: 99%

“…This results in major advantages for rational drug design, which can selectively be attributed to either boron or phosphorus atom. In short, high degree of tuneability of B- 21–26 and P-containing 27–31 heterocycles in combination with chemical stability allow for precise molecular engineering. Thus, physicochemical traits ( e.g.…”

Section: Introductionmentioning

confidence: 99%