The Growth and Sporulation of <i>Bacillus subtilis</i> in Nanotesla Magnetic Fields

Obhođaš, Jasmina; Valković, V.; Kollar, Robert; Hrenović, Jasna; Nađ, Karlo; Vinković, Andrija; Orlic, Z.

doi:10.1089/ast.2020.2288

Cited by 6 publications

(11 citation statements)

References 39 publications

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“…The findings of Obhođaš et al (16) demonstrated that magnetic fields below 400 nT significantly enhance the growth of Bacillus subtilis compared to controls growing in the Earth's magnetic field. This might suggest that microorganisms favor extremely low magnetic fields.…”

Section: Imcs -Environment Where Life Might Have Originatedmentioning

confidence: 99%

“…and R 2 curves presumably towards the better agreement between two data sets, those for LUCA and the abundances of elements in stars, but it would not change the shape of the curve. For example, the correction for potassium in LUCA for a factor of 5.5 (16) shifts up the R 2 estimates for 0.035 (i.e. 3.5 % better agreement was observed between abundance curves for LUCA and stars throughout the chemical galactic evolution).…”

Section: The Estimation Of Toriginmentioning

confidence: 99%

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Origins of Chiral Life in Interstellar Molecular Clouds

Valković¹,

Obhođaš²

2021

Preprint

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The phenomenon of life is discussed within a framework of its origin as defined by the following assumptions. Life, as we know it, is (H-C-N-O) based and relies on the number of bulk (Na-Mg-P-S-Cl-K-Ca) and trace elements (Li-B-F-Si-V-Cr-Mn-Fe-Co-Ni-Cu-Zn-As-Se-Mo-I-W). It originated when the element abundance curve of the living matter and of the universe coincided. By studying the chemical evolution of the solar neighborhood we have obtained the best agreement between the two curves for (4 ± 1)x109 years after the Big Bang. The dust-forming planetary system and stars already contained an excess of L- type amino acids and D- type sugars when incorporated into proteins and primitive organisms. Therefore, the emerging life had to be chiral. Because of the universe's aging, life originated only once.

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Section: Imcs -Environment Where Life Might Have Originatedmentioning

confidence: 99%

Section: The Estimation Of Toriginmentioning

confidence: 99%

Origins of Chiral Life in Interstellar Molecular Clouds

Valković¹,

Obhođaš²

2021

Preprint

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“…Figure 2 presents concentrations of selected essential elements relative to iron in LUCA, compared to the same for the present Sun (Asplund et al 2009). It has been recently shown by Obhođaš et al (2021) that preconcentration factors can be different in very low magnetic fields. Bacillus subtilis grown in magnetic fields of 100 nT, which are intensities found in IMCs (Crutcher 2012), required 5.5 times less potassium compared to the control culture growing in the Earth's magnetic field.…”

Section: The Estimation Of T Originmentioning

confidence: 99%

“…Thus, the abundances derived for LUCA may be severely misleading. If potassium abundance in LUCA is corrected by factor 5.5 inferred from the experiment with the Bacillus subtilis grown in the magnetic field of 100 nT (Obhođaš et al 2021), the LUCA abundance curve resembles the Sun abundance curve more closely. The essential element concentration factors of primitive life forms for intensities of magnetic and gravitational fields found in IMCs will be systematically studied in our future research.…”

Section: The Estimation Of T Originmentioning

confidence: 99%

“…On the other hand, the corrections for concentration factors in LUCA would shift the χ 2 and R 2 curves presumably toward the better agreement between two data sets (those for LUCA and the abundances of elements in stars of the solar neighborhood), but it would not change the shape of the χ 2 and R 2 curves. For example, the correction for potassium in LUCA for a factor of 5.5 (Obhođaš et al 2021) shifts up the R 2 estimates for 0.035 (i.e., 3.5% better agreement was observed between abundance curves for LUCA and stars of the solar neighborhood throughout their chemical evolution).…”

Section: The Estimation Of T Originmentioning

confidence: 99%

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Origins of Chiral Life in Interstellar Molecular Clouds

Valković

Obhođaš

2022

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The exploring of galactic chemical composition across the the Milky Way, and specifically across the solar neighborhood, provides insights into the chemical evolution of the universe. Since the formation of the first stars some hundred million years after the big bang (BB), heavier elements are synthesized in different stellar production processes at the expense of lighter elements. When the relative abundances of the life-forming elements evaluated for the Last Universal Common Ancestor (LUCA) are compared with the solar neighborhood stellar abundances, a striking similarity occurs. In this study, we tested the hypothesis that in some particular regions and at some particular time, the abundance curve of the first living matter and the universe coincided. Indeed, the best agreement between the two curves was obtained for (4 ± 1)× 109 yr after the BB, indicating the time of the origin of life. All organisms evolved on the Earth independently of place and time are leading to the LUCA and involve chiral molecules such as L amino acids and D sugars in fundamental life processes. The growing evidence from carbonaceous meteorites analysis shows an excess of L-type amino acids and D-type sugars, suggesting that the increase in L-type or D-type molecular chirality is the process that takes place in planetary and stellar forming systems, thus the life emerging from interstellar molecular clouds (IMCs) had to be chiral. Here we propose the spin-polarized proton–proton scattering as a potential physical process that takes place in IMCs environments and could lead to enrichment of L-type amino acids and D-type sugars.

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Hypomagnetic Field Exposure Affecting Gut Microbiota, Reactive Oxygen Species Levels, and Colonic Cell Proliferation in Mice

Zhan

Luo

Qin

et al. 2022

Bioelectromagnetics

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The gut microbiota has been considered one of the key factors in host health, which is influenced by many environmental factors. The geomagnetic field (GMF) represents one of the important environmental conditions for living organisms. Previous studies have shown that the elimination of GMF, the so-called hypomagnetic field (HMF), could affect the physiological functions and resistance to antibiotics of some microorganisms. However, whether long-term HMF exposure could alter the gut microbiota to some extent in mammals remains unclear. Here, we investigated the effects of long-term (8-and 12-week) HMF exposure on the gut microbiota in C57BL/6J mice. Our results clearly showed that 8-week HMF significantly affected the diversity and function of the mouse gut microbiota. Compared with the GMF group, the concentrations of short-chain fatty acids tended to decrease in the HMF group. Immunofluorescence analysis showed that HMF promoted colonic cell proliferation, concomitant with an increased level of reactive oxygen species (ROS). To our knowledge, this is the first in vivo finding that long-term HMF exposure could affect the mouse gut microbiota, ROS levels, and colonic cell proliferation in the colon. Moreover, the changes in gut microbiota can be restored by returning mice to the GMF environment, thus the possible harm to the microbiota caused by HMF exposure can be alleviated. Bioelectromagnetics. 43:462-475, 2022.

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The Growth and Sporulation of Bacillus subtilis in Nanotesla Magnetic Fields

Cited by 6 publications

References 39 publications

Origins of Chiral Life in Interstellar Molecular Clouds

Origins of Chiral Life in Interstellar Molecular Clouds

Origins of Chiral Life in Interstellar Molecular Clouds

Hypomagnetic Field Exposure Affecting Gut Microbiota, Reactive Oxygen Species Levels, and Colonic Cell Proliferation in Mice

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