Article
Chemistry, Applied
Cheng Li, Bo Gong
Summary: The study found that the thickness of amorphous lamellae of starch was mainly correlated with the amount of amylose short and medium chains, while the degree of crystallinity was negatively correlated with the amount of amylose short and long chains. Interestingly, starch molecular size distributions were shown to have no correlations with the starch lamellar/crystalline structures.
Article
Chemistry, Applied
Zhongwei Zhang, Xiangyun Fan, Hongxiang Ma, Cheng Li, Enpeng Li, Robert G. Gilbert
Summary: This study utilized size-exclusion chromatography to analyze changes in starch molecular structure in sugar-snap cookies after baking, finding a significant decrease in the size of amylose chains but little difference in amylopectin chain-length distribution. The disruption of short-range ordered structure and periodic lamellar structure suggests important implications for cookie quality determinants.
CARBOHYDRATE POLYMERS
(2021)
Article
Biotechnology & Applied Microbiology
Hong Chang, Jie Bai, Hejian Zhang, Rong Huang, Huanyu Chu, Qian Wang, Hao Liu, Jian Cheng, Huifeng Jiang
Summary: This study comprehensively analyzed the phylogenetic and structural aspects of three types of starch biosynthetic enzymes to investigate the origin and evolution of the starch biosynthetic pathway. The results suggest that the origin of this pathway is related to horizontal gene transfer and endosymbiosis gene transfer, which played important roles in plant evolution. Additionally, after the divergence of Viridiplantae from Rhodophyta, all three enzymes underwent duplications and modifications, resulting in functionally specialized isoforms and the complete starch biosynthetic pathway.
SYNTHETIC AND SYSTEMS BIOTECHNOLOGY
(2023)
Review
Chemistry, Applied
Xueer Yi, Cheng Li
Summary: The review evaluates the main factors affecting the resistant starch content of cooked white rice, aiming to assist the food industry in developing strategies to increase the resistant starch content.
FOOD HYDROCOLLOIDS
(2022)
Article
Biochemistry & Molecular Biology
Yibo Li, Lingxiao Zhao, Laiquan Shi, Lingshang Lin, Qinghe Cao, Cunxu Wei
Summary: This study investigated the physicochemical properties of starches from 44 sweet potato varieties originating from 15 countries. The results showed significant differences in granule size, iodine absorption properties, amylose content, and thermal behavior among the starches. These differences divided the varieties into different groups based on their genotype backgrounds. The research provides references for the utilization of sweet potato germplasm.
Article
Chemistry, Applied
Trinh Thi My Duyen, Pham Van Hung
Summary: This study investigated the physicochemical characteristics and digestibility of starch nanoparticles (SNPs) fabricated from debranched cassava starch varying in degree of polymerization using nanoprecipitation and microemulsion methods. SNPs fabricated from high DP starch were well-dispersed and smaller, while those from medium and low DP starch were larger and more aggregated. The SNPs produced by the microemulsion method were larger and more aggregated compared to those by the nanoprecipitation method, with all SNPs showing higher relative crystallinity and more ordered structure than native starch. SNPs fabricated from low DP starch also had higher resistant starch content and lower blood glucose response in mice.
CARBOHYDRATE POLYMERS
(2021)
Review
Biochemistry & Molecular Biology
Chengdeng Chi, Suyang Lian, Yiqing Zou, Bilian Chen, Yongjin He, Mingmin Zheng, Yingting Zhao, Hongwei Wang
Summary: This review summarizes the methods for starch acetylation and discusses the impact of acetylation on starch structure and functionalities. Innovative techniques can be used for environmentally friendly synthesis of acetylated starch. Acetylation degrades starch structures and weakens the interactions between starch molecules, resulting in the disorganization of starch multi-scale ordered structure. The introduction of acetyl groups improves the solubility, clarity, softness, water/oil absorption capacity, emulsifiability, film-forming properties, colonic fermentability, and reduces the susceptibility of starch to enzymes.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biochemistry & Molecular Biology
Chengdeng Chi, Ying Yang, Shuanglong Li, Xiaona Shen, Meiying Wang, Yiping Zhang, Xianghua Zheng, Longmei Weng
Summary: The crystalline structure and moisture content of starch play a crucial role in its structural and digestibility changes during microwave heat-moisture treatment (MHMT). Starches with lower A-type crystal content (4.13%-6.18%) and moisture content of 10%-20% exhibited more ordered structures and lower digestibility after treatment.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Plant Sciences
Aakanksha Singh, Julia Compart, Shadha Abduljaleel AL-Rawi, Harendra Mahto, Abubakar Musa Ahmad, Joerg Fettke
Summary: The non-catalytic starch-binding proteins LESV and ESV1 play a crucial role in starch metabolism, affecting phosphorylation, hydrolysis and synthesis processes. They also induce stable alterations in the glucan structures at the surface of starch granules.
Article
Ophthalmology
Cecilia Diez-Montero, Alberto Lopez-de la Rosa, Alberto Lopez-Miguel, Miguel J. Maldonado
Summary: The relationship between anterior chamber depth (ACD) and lens thickness (LT), as well as its three main components, in cataractous and non-cataractous eyes was assessed in this study. The presence of cataracts does not modify the inverse relationship of the LT, anterior and posterior cortex, and nucleus with ACD, and this relationship does not seem to depend importantly on axial length (AxL). The possible differences in LT, anterior and posterior cortex, and nucleus between cataractous and non-cataractous eyes may not be caused by lens opacification, but possibly by the progressive lens growth due to aging.
GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY
(2023)
Article
Food Science & Technology
Guadalupe Mendez-Montealvo, Gonzalo Velazquez, Heidi A. Fonseca-Florido, Eduardo Morales-Sanchez, Adrian Soler
Summary: The study revealed that long-term acid hydrolysis resulted in changes in the crystalline and double-helical structure of the non-conventional starch achira, impacting its functionality. However, by adjusting the hydrolysis time appropriately, the functionality of AS can be regulated.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Nguyen Thi Mai Huong, Phan Ngoc Hoa, Pham Van Hung
Summary: The study investigated morphology, molecular crystalline structure, and digestibility of debranched mung bean starches with or without microwave treatment and retrogradation at different temperatures. The results showed that microwave treatment and further crystallization significantly improved the crystalline structure of starch granules, leading to higher resistant starch content and enhanced resistance to enzyme digestion.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Review
Chemistry, Applied
Shuaibo Shao, Xueer Yi, Cheng Li
Summary: Developing Chinese steamed bread with slower starch digestibility is important for improving human health. Current strategies focus on incorporating whole flours with high dietary fiber or polyphenols, but this affects the texture and sensory characteristics of the bread. Further exploration of strategies for reducing starch digestibility is needed.
Article
Nutrition & Dietetics
Xiaolong Ji, Zhiwen Wang, Xueyuan Jin, Zhenpeng Qian, Le Qin, Xudan Guo, Mingsong Yin, Yanqi Liu
Summary: This study investigated the effect of inulin (IN) on three different crystalline starches, revealing varying responses to IN including changes in pasting, retrogradation, and structural characteristics. Results showed that IN interacted with starch via hydrogen bonding and electrostatic force, inhibiting retrogradation to different degrees in different starches. These findings contribute to the theoretical knowledge of the IN-starch compound system and offer a solid foundation for further applications.
FRONTIERS IN NUTRITION
(2022)
Article
Agricultural Engineering
Chengdeng Chi, Youcai Zhou, Feiyang Cheng, Xu Guo, Bilian Chen, Yiping Zhang, Yongjin He
Summary: Chlorella sp. MBFJNU-17, a strain rich in starch and protein, can be obtained by adjusting the glucose and urea content during cultivation. The structure and digestibility of the starch produced by MBFJNU-17 cells can be modulated by regulating the glucose and urea content in heterotrophic cultivation conditions.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Physics, Condensed Matter
J. A. Villada, Marius Ramirez-Cardona, M. A. Hernandez-Landaverde, J. C. Franco-Correa, S. Jimenez-Sandoval, M. E. Rodriguez-Garcia
Summary: The study investigated how the substrate temperature affects the growth of Cu2-xTe films using the RF sputtering technique, discovering different structural phases at various temperatures. A new stoichiometric Cu7Te4 phase, delta', was identified at all temperatures, while higher temperatures favored the delta' phase with Cu7Te4 or Cu2-xTe composition and lower temperatures favored the commensurate superstructure 7C with higher Cu/Te ratio. The transition between these phases was observed at around 250 degrees C.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Physical
Fausto M. Guiza, Yeray A. Rodriguez-Nunez, David Ramirez, Arnold R. Romero Bohorquez, Jose Antonio Henao, Robert A. Toro, Jose Miguel Delgado, Graciela Diaz de Delgado
Summary: In this study, two new tetrahydroquinoline derivatives were synthesized through a one-pot reaction and characterized by various techniques. The crystal structures and intermolecular interactions were analyzed, and the compounds showed potential as monoamine oxidase B (MAO-B) inhibitors, similar to the drug rasagiline commonly used in Parkinson's and Alzheimer's diseases.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Optics
Eric Ortiz-Vazquez, I. A. Lujan-Cabrera, Cesar Isaza, J. A. Rizzo-Sierra, C. F. Ramirez-Gutierrez
Summary: A methodology based on genetic algorithms is used to design and optimize broadband modulated one-dimensional photonic crystals based on porous silicon. Different modulation functions are tested to maximize the reflectance intensity in a target region, and the structures show high mechanical stability.
Article
Materials Science, Multidisciplinary
R. F. Sierra-Moreno, I. A. Lujan-Cabrera, J. M. Cabrera-Teran, Eric Ortiz-Vazquez, M. E. Rodriguez-Garcia, C. F. Ramirez-Gutierrez
Summary: This work proposes a methodology using porous silicon thermal oxidation to reduce optical losses and change the optical response of one-dimensional photonic structures. The method involves controlling variations in porosity, pore filling, and refractive index by oxidizing the samples in an air atmosphere at different temperatures and sintering times. The samples were characterized using different analytical techniques and the optical properties were analyzed using UV-Vis spectroscopy and mathematical models. The study provides insights into the optical response of oxidized porous silicon for UV-Vis range applications.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Food Science & Technology
Elsa Gutierrez-Cortez, Ezequiel Hernandez-Becerra, Sandra M. Londono-Restrepo, Beatriz M. Millan-Malo, Eduardo Morales-Sanchez, Marcela Gaytan-Martinez, Mario E. Rodriguez-Garcia
Summary: This study focused on the physiochemical changes in maize endosperm during a thermo-alkaline nixtamalization process. It was found that calcium content increased in the outer layers, starch granules showed no damage, and the pasting properties were influenced by the morphology of the paste.
JOURNAL OF CEREAL SCIENCE
(2022)
Article
Materials Science, Characterization & Testing
Analio J. Dugarte-Dugarte, Robert A. Toro, Jacco van de Streek, Jose Antonio Henao, Graciela Diaz de Delgado, Jose Miguel Delgado
Summary: The previously unreported crystal structure of (S)-Dapoxetine hydrochloride (DAPHCl) has been determined and optimized using laboratory X-ray powder diffraction data, dispersion-corrected DFT calculations, and the Rietveld method. This compound's crystal structure consists of DAPHCl moieties held together by hydrogen bonds, pi π, and C-H π interactions in a complex 3D arrangement.
POWDER DIFFRACTION
(2022)
Article
Energy & Fuels
Julio Colmenares-Zerpa, Genesis Marquez, Ricardo Jose Chimentao, Analio Dugarte-Dugarte, Jose Miguel Delgado, Sergio Gonzalez-Cortes, Claudio Lugo, Freddy E. Imbert, Pedro Rodriguez-Sulbaran
Summary: This study prepared a series of BEA-type zeolitic materials in hydrothermal systems with different crystallization times to investigate their catalytic performance in the alkylation of isobutane with trans-2-butene. The materials were characterized by various techniques and showed high selectivity towards C7-C9+ compounds, particularly C8 compounds. The study emphasized the importance of balancing the acidic sites and porous topology of zeolitic materials, as well as selecting appropriate reaction parameters to favor the yield of alkylate.
Article
Chemistry, Multidisciplinary
Mayra Cuellar-Cruz, Marius Ramirez-Cardona, Selene R. Islas, Abel Moreno
Summary: The atmospheric and chemical conditions during the Precambrian era favored the origin of life. Minerals and rocks catalyzed the synthesis of biomolecules, and mineral clays were found to have the best-suited surface for protobiomolecule polymerization. Inorganic structures called biomorphs, similar to microfossils, may have existed since that time. Clays and environmental conditions played a crucial role in the structure, composition, and crystalline habit of the first organisms.
ACS EARTH AND SPACE CHEMISTRY
(2022)
Article
Mathematics
Cesar Isaza, Ivan Alonso Lujan-Cabrera, Ely Karina Anaya Rivera, Jose Amilcar Rizzo Sierra, Jonny Paul Zavala De Paz, Cristian Felipe Ramirez-Gutierrez
Summary: This work presents an optimization tool based on genetic algorithms for inverse design of photonic crystals. By generating a population of chromosomes with disordered layer thicknesses based on target reflectance, the algorithm aims to find the best-fitted configuration. The research shows that it is possible to obtain photonic crystal configurations with specific stop bands using this method, which can be used to train a neural network for solving the inverse design problem of crystals with specific optical responses.
Article
Engineering, Mechanical
Francisco G. Mejia Hernandez, Marius Ramirez Cardona, Gilgamesh Luis Raya, Armando I. Martinez Perez, Edgar Vera E. Cardenas, Rene Cabrera, Edgar Cardoso Legorreta, Martin Reyes Perez
Summary: This paper reports on the sliding wear tests performed on base and thermal treated gray cast iron samples from an internal combustion engine cylinder liner under dry and lubricated conditions. The results show that the thermal treatment leads to a decrease in friction coefficient and specific wear rate due to the appearance of irregular graphite nodules. The study highlights the importance of the thermal treatment in enhancing the self-lubricating function of low carbon cast iron and its synergistic effect with oil lubricant.
TRIBOLOGY TRANSACTIONS
(2023)
Article
Astronomy & Astrophysics
Jorge David Castano-Yepes, Fernando Martinez Paniagua, Victor Munoz-Vitelly, Cristian Felipe Ramirez-Gutierrez
Summary: This study investigates the impact of finite volume and thermal fluctuations on the critical end point of the QCD phase diagram. The results show that the temperature at the pseudocritical point decreases by about 7% for small volumes, and the critical end point shifts towards higher densities and lower temperatures by approximately 12%. Furthermore, the results indicate that chiral symmetry restoration is robust against thermal fluctuations in this approximation.
Article
Crystallography
Robert A. Toro, Analio Dugarte-Dugarte, Jacco van de Streek, Jose Antonio Henao, Jose Miguel Delgado, Graciela Diaz de Delgado
Summary: The structure of the diuretic drug RS-trichlormethiazide was determined using laboratory X-ray powder diffraction data and different computational methods. The compound forms chains and layers through pi-pi and C-Cl center dot center dot center dot pi interactions, with hydrogen bonds playing a significant role in the overall structure. Hirshfeld surface analysis highlighted the importance of H center dot center dot center dot O and H center dot center dot center dot Cl interactions. The study also compared the structure with that of S-trichlormethiazide.
ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Angelica M. Castillo-Paz, Sandra M. Londono-Restrepo, Cesar Ortiz-Echeverri, Rafael Ramirez-Bon, Mario E. Rodriguez-Garcia
Summary: The study analyzed the physicochemical properties of bovine trabecular bone (BTB) and found the presence of various minor ions and preferred orientation of hydroxyapatite nanocrystals in natural scaffolds. Through 3D reconstruction and density calculations, it was discovered that the areal bone mineral density of BTB is inversely related to sample porosity. The mechanical properties of the scaffolds are influenced by the crystalline structure, morphology, and distribution of hydroxyapatite nanocrystals.
