Structural changes in smectite due to interaction with a biosurfactant-producing bacterium Pseudoxanthomonas kaohsiungensis

Biswas, Bhabananda; Chakraborty, Argha; Sarkar, Binoy; Naidu, Ravi

doi:10.1016/j.clay.2016.11.008

Cited by 32 publications

(10 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the characteristic band at 842 cm –1 belonged to the bending vibrations of Al–Mg–OH, which was most significant in Mg-BENT. A new band at 1541 cm –1 in CT-BENT was correlated with the NH 2 vibration mode in chitosan. , SA-BENT showed new peaks at 1706 and 1548 cm –1 associated with the bending vibrations and asymmetric stretching vibration of the carboxyl group. , Bands at 2850 and 2918 cm –1 were due to a CH 2 symmetric stretching mode and asymmetric stretching mode. The absorbance bands at 1433 and 2956 cm –1 correspond to CH 3 bending and stretching vibration modes.…”

Section: Resultsmentioning

confidence: 85%

“…9−11 Cell immobilization on mineral carriers refers to the restriction and localization of intact cells to a spatial region to protect strains and maintain its physiological activity. 12 Bentonite with montmorillonite as the main mineral component, which has an excellent specific surface area and a high cation exchange capacity (CEC), has been explored as a promising microorganism adsorbent 13,14 and soil amendment to enhance the enzymatic activity 15 and reshape the soil microbial community structure by reducing the pathogen proportion. 16 The immobilized capacity of bacteria on carriers depends on an initial adhesion between the solid surface and the bacterial cells followed by tight adhesion between the cells and ultimately evolves to form stable biofilms.…”

Section: ■ Introductionmentioning

confidence: 99%

“…A variety of advanced technologies have been employed in the microbial fertilizer industry for enhancing the storage, transport, and efficiency of the formulation, including encapsulated microorganisms in biocompatible polymers, − a water retention hydrogel, , and an immobilized cell on solid carriers. − Cell immobilization on mineral carriers refers to the restriction and localization of intact cells to a spatial region to protect strains and maintain its physiological activity . Bentonite with montmorillonite as the main mineral component, which has an excellent specific surface area and a high cation exchange capacity (CEC), has been explored as a promising microorganism adsorbent , and soil amendment to enhance the enzymatic activity and reshape the soil microbial community structure by reducing the pathogen proportion …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Elucidating Adhesion Behaviors and the Interfacial Interaction Mechanism between Plant Probiotics and Modified Bentonite Carriers

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Bentonite mineral can be used as the support carrier of microbial inoculant. The promising carrier should have excellent adsorption capacity and affinity for plant probiotics. However, the adhesion mechanisms and interface interaction underlying the bentonite carriers and plant probiotics remain uncertain. In this study, the interface interactions of two kinds of plant growth-promoting bacteria (Rs-2 and SL-44) and five different bentonite carriers were examined. The results indicated that the maximum bacteria adsorption capacity and affinity were obtained by hydrophobic stearic acid-modified bentonite (SA-BENT) owing to its attractive acid–base interaction as calculated by extended-DLVO theory. The stronger acid–base interaction between Rs-2 and the carriers promoted its adhesion, which may be attributed to its more hydrophobic surface structure acting as a broom to remove interfacial water. SL-44 had a stronger adsorption binding energy and smaller adsorption capacity since its EPS components (e.g., low polarity, aromatic lipophilic protein macromolecules) were preferentially absorbed and occupied absorption sites based on the fluorescence excitation–emission matrix (EEM) and normalized volume integral of the fluorescence region.

show abstract

Section: Resultsmentioning

confidence: 85%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Elucidating Adhesion Behaviors and the Interfacial Interaction Mechanism between Plant Probiotics and Modified Bentonite Carriers

et al. 2021

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…This phenomenon might be explained as follows: Kaolin particles had higher edge charge and van der Waals force interaction than bentonite particles [45], and therefore the electrostatic interaction between the negative charged XG and the positive charged kaolin particles formed more wellbonded XG-clay matrix. On the other hand, the highly expendable nature of bentonite allowed the water molecules to enter the interlayer region [73,74]. Due to the hydrophilic property of XG, this water absorption behaviour was more remarkable for XG-treated soils than untreated soils.…”

Section: Strengthening Efficiency For Different Sand-clay Mixturesmentioning

confidence: 99%

The Optimisation Analysis of Sand-Clay Mixtures Stabilised with Xanthan Gum Biopolymers

Hao

Chen

et al. 2021

Sustainability

View full text Add to dashboard Cite

Sand–clay mixtures can be encountered in both natural soils (e.g., residual soils, clay deposits and clinosols) and artificial fills. The method of utilising biopolymers in ground improvement for sand–clay mixtures has emerged recently. However, a full understanding of the strengthening effect of biopolymer-treated sand–clay mixtures has not yet been achieved due to a limited number of relevant studies. In this study, xanthan gum (XG), as one of the eco-friendly biopolymers, was used to treat reconstituted sand–clay mixtures that had various compositions in related to clay (or sand) content and clay type (kaolin and bentonite). A series of laboratory unconfined compression strength (UCS) tests were conducted to probe the performances of XG-treated sand–clay mixtures from two aspects, i.e., optimum treatment conditions (e.g., XG content and initial moisture content) to achieve the maximum strengthening effect and strengthening efficiency for the sand–clay mixtures with different compositions. The experimental results indicated that the optimum initial moisture content decreased as the sand content increased. The optimum XG content, which also decreased with the increasing sand content, remained approximately 3.75% for all sand–kaolin mixtures and 5.75% for all sand–bentonite mixtures if calculated based on clay fraction. While untreated sand–kaolin mixtures and sand–bentonite mixtures had comparable UCS values, XG-treated sand–kaolin mixtures seemed to have better improved mechanical strength due to higher ionic (or hydrogen) bonds with XG and low-swelling properties compared with bentonite. The deformation modulus of XG-treated sand–clay mixtures were positively related with UCS. The variation in UCS and stiffness for each treatment condition increased as the sand content was elevated for both sand-kaolin and sand-bentonite mixtures. An increment in the proportion of the heterogeneous composite formed by irregular sand particles conglomerated with the XG–clay matrix in total soil might be responsible for this phenomenon.

show abstract

“…Within this family, Xanthomonas, Stenotrophomonas, Xylella and Pseudoxanthomonas are closely related genera which forms a phylogroup (referred to as XSXP phylogroup in this study) . Xanthomonas, Xylella and Pseudoxanthomonas are characterized by a yellow pigment xanthomonadin and exopolysaccharide xanthan gum production (Biswas, Chakraborty, Sarkar, & Naidu, 2017;da Silva, Vettore, Kemper, Leite, & Arruda, 2001;He, Cao, & Poplawsky, 2020;Katzen et al, 1998;Lu et al, 2008;Rajagopal, Sundari, Balasubramanian, & Sonti, 1997). XSXP phylogroup have a long history of taxonomic reshuffling based on phenotypic, morphological characteristics and genotypic methods.…”

Section: Introductionmentioning

confidence: 99%

Deep phylo-taxono genomics reveals Xylella as a variant lineage of plant associated Xanthomonas with Stenotrophomonas and Pseudoxanthomonas as misclassified relatives

Bansal

Kaur

Singh

et al. 2021

Preprint

View full text Add to dashboard Cite

Genus Xanthomonas is a group of phytopathogens which is phylogenetically related to Xylella, Stenotrophomonas and Pseudoxanthomonas following diverse lifestyles. Xylella is a lethal plant pathogen with highly reduced genome, atypical GC content and is taxonomically related to these three genera. Deep phylo-taxono-genomics reveals that Xylella is a variant Xanthomonas lineage that is sandwiched between Xanthomonas species. Comparative studies suggest the role of unique pigment and exopolysaccharide gene clusters in the emergence of Xanthomonas and Xylella clades. Pan genome analysis identified set of unique genes associated with sub-lineages representing plant associated Xanthomonas clade and nosocomial origin Stenotrophomonas. Overall, our study reveals importance to reconcile classical phenotypic data and genomic findings in reconstituting taxonomic status of these four genera.

show abstract

Structural changes in smectite due to interaction with a biosurfactant-producing bacterium Pseudoxanthomonas kaohsiungensis

Cited by 32 publications

References 45 publications

Elucidating Adhesion Behaviors and the Interfacial Interaction Mechanism between Plant Probiotics and Modified Bentonite Carriers

Elucidating Adhesion Behaviors and the Interfacial Interaction Mechanism between Plant Probiotics and Modified Bentonite Carriers

The Optimisation Analysis of Sand-Clay Mixtures Stabilised with Xanthan Gum Biopolymers

Deep phylo-taxono genomics reveals Xylella as a variant lineage of plant associated Xanthomonas with Stenotrophomonas and Pseudoxanthomonas as misclassified relatives

Contact Info

Product

Resources

About