Structure and physicochemical properties of starches in lotus (<i><scp>N</scp>elumbo nucifera</i> Gaertn.) rhizome

Yu, Huaguang; Cheng, Libao; Yin, Jie; Yan, Shunjun; Liu, Kejun; Zhang, Fengmin; Xu, Bin; Li, Liangjun

doi:10.1002/fsn3.37

Cited by 63 publications

(24 citation statements)

References 34 publications

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“…XRD results for the partially hydrolyzed starch and the cationic starch derivatives (Figure ) show three well defined peaks for the starch at 15.1°, 17.3°, 19,1°, and 23.2° 2θ angles. The observed reflection angles are very close to the angles attributed to A‐type crystallinity of the starch . For the cationized derivatives, only one large peak with a lower intensity at 19.9° is observed in the same region, which confirms that the cationized derivatives have a lower degree of crystallinity than the hydrolyzed starch.…”

Section: Resultssupporting

confidence: 70%

Cationic starch derivatives as reactive shale inhibitors for water‐based drilling fluids

Cescon

Quartarone

Silva

et al. 2018

J of Applied Polymer Sci

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One of the major problems associated with the use of water‐based drilling fluids is the interaction of water with specific rock formations, such as shales, and the consequent swelling of reactive clays that may be present in that type of rock. Several types of clays reactivity inhibitors have been used by the oil industry, and the most effective ones are the cationic polyelectrolytes, such as the poly(diallyldimethylammonium chloride) (PDADMAC). However, this polyelectrolyte is very toxic. In this work, a series of cationic starch derivatives with different cationic degrees were synthesized with the objective of evaluating their potential as environmentally correct shale reactivity inhibitors. The results showed that the synthesized derivatives presented a good capacity of adsorption on bentonite and an efficient inhibition of the shale reactivity. The derivative with an intermediate cationic degree presented the best performance. In the tests with the formulated fluids this derivative provided an intact cuttings recovery of 84.8% and a total recovery of 92.3%. These values are very close to those found for the PDADMAC additive, therefore indicating that this cationic starch derivative presents a good potential as inhibitor of the shale reactivity. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46621.

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Section: Resultssupporting

confidence: 70%

Cationic starch derivatives as reactive shale inhibitors for water‐based drilling fluids

Cescon

Quartarone

Silva

et al. 2018

J of Applied Polymer Sci

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“…In this study, we reveal that both the gene evolutionary rates across the lotus genome and the ratios of loss‐of‐function in several large gene families were varied, which implied differential functional constraints and selective pressure in lotus. Temperate and tropical lotus differs significantly in their rhizome carbohydrate content (Yu et al ; Yang et al ). Comparative transcriptomic study of rhizome from temperate and tropical lotus also showed that differentially expressed genes were enriched in carbohydrate metabolism, including starch synthesis and glucan metabolic process (Yang et al ).…”

Section: Discussionmentioning

confidence: 99%

“…The gene expression data were analyzed using the software package of Transcriptome Analysis with Reference Genomes in the BMKCloud cloud server (http://www.biocloud.net). As one of the main characters to distinguish temperate and tropical lotus is the rhizome phenotype (Yu et al ; Yang et al ), gene expression profile during rhizome development and bud development of these candidate genes were analyzed with Expander 6 (Shamir et al ; Yang et al ).…”

Section: Methodsmentioning

confidence: 99%

Whole genome re-sequencing reveals evolutionary patterns of sacred lotus (Nelumbo nucifera)

Huang

Yang

et al. 2018

J. Integr. Plant Biol.

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Sacred lotus (Nelumbo nucifera or lotus) is an important aquatic plant in horticulture and ecosystems. As a foundation for exploring genomic variation and evolution among different germplasms, we re-sequenced 19 individuals from three cultivated temperate lotus subgroups (rhizome, seed and flower lotus), one wild temperate lotus subgroup (wild lotus), one tropical lotus group (Thai lotus) and an outgroup (Nelumbo lutea). Through genetic diversity and polymorphism analysis by non-missing SNP sites widely distributed in the whole genome, we confirmed that wild and Thai lotus exhibited greater differentiation with a higher genomic diversity compared to cultivated lotus. Rhizome lotus had the lowest genomic diversity and a closer relationship to wild lotus, whereas the genomes of seed and flower lotus were admixed. Genes in energy metabolism process and plant immunity evolved rapidly in lotus, reflecting local adaptation. We established that candidate genes in genomic regions with significant differentiation associated with temperate and tropical lotus divergence always exhibited highly divergent expression pattern. Together, this study comprehensive and credible interpretates important patterns of genetic diversity and relationships, gene evolution, and genomic signature from ecotypic differentiation of sacred lotus.

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“…Lotus ( Nelumbo nucifera Gaertn) is a perennial aquatic plant in Australia, India, Japan and especially in China (Yu et al . ; Liu et al . ).…”

Section: Introductionmentioning

confidence: 99%

Chemical Deterioration of Lotus Seeds During Storage

Luo

Liu

Huang

et al. 2016

Journal of Food Quality

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Starch, protein and lipids, the major components in lotus seeds, affected taste and cooking properties of the food. The chemical compositions, gelatinization properties, crystal structure of the starch, compositions of fatty acids and soluble protein of lotus seeds, stored for 24 months, 12 months and as fresh were studied. The overall starch, protein and lipid contents in lotus seeds remained unchanged during storage, but structural changes occurred. The contents of amylose and free fatty acid increased significantly during prolonged storage, but the solubility of protein decreased dramatically. The increases of onset temperature, peak temperature and gelatinization enthalpy of lotus seed starch were also studied by a differential scanning calorimetry. Its content especially for disulfide bonds, increased from 63.24 to 95.59 μ mol/g. All changes had significant correlation with storage time and ultimately denatured the sensory quality of selected aged lotus seeds. The study could be conductive to fresh lotus seed discrimination from stale seed, and dynamic monitoring of lotus seed, by determination chemical deterioration of lotus seeds during storage. Practical Applications This study is helpful to discriminate fresh lotus seed from stale seed, and explain aging mechanism, and put forward the improvement measures of lotus seed storage conditions.

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Structure and physicochemical properties of starches in lotus (Nelumbo nucifera Gaertn.) rhizome

Cited by 63 publications

References 34 publications

Cationic starch derivatives as reactive shale inhibitors for water‐based drilling fluids

Cationic starch derivatives as reactive shale inhibitors for water‐based drilling fluids

Whole genome re-sequencing reveals evolutionary patterns of sacred lotus (Nelumbo nucifera)

Chemical Deterioration of Lotus Seeds During Storage

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