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Resistant starch

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https://www.readbyqxmd.com/read/28739411/impact-of-heat-moisture-and-annealing-treatments-on-physicochemical-properties-and-digestibility-of-starches-from-different-colored-sweet-potato-varieties
#1
Phan Thanh Bao Trung, Luu Bui Bao Ngoc, Phan Ngoc Hoa, Nguyen Ngoc Thanh Tien, Pham Van Hung
The objective of this study is to investigate the change in physicochemical properties and digestibility of starches isolated from colored sweet potato varieties under heat-moisture treatment (HMT) or annealing treatment (ANN). The results showed that morphology and X-ray diffraction patterns of the sweet potato starches remained unchanged after the HMT or ANN. The HMT significantly reduced peak viscosity, breakdown and setback and significantly increased pasting temperature, trough and final viscosities of the sweet potato starches...
July 21, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28736992/microbiota-metabolome-and-immune-alterations-in-obese-mice-fed-a-high-fat-diet-containing-type-2-resistant-starch
#2
Javad Barouei, Zach Bendiks, Alice Martinic, Darya Mishchuk, Dustin Heeney, Yu-Hsin Hsieh, Dorothy Kieffer, Jose Zaragoza, Roy Martin, Carolyn Slupsky, Maria L Marco
SCOPE: We examined the intestinal and systemic responses to incorporating a type 2 resistant starch (RS) into a high fat diet fed to obese mice. METHODS AND RESULTS: Diet-induced obese, C57BL/6J mice were fed a HF diet without or with 20% (by weight) high-amylose maize resistant starch (HF-RS) for six weeks. Serum adiponectin levels were higher with RS consumption, but there were no differences in weight gain and adiposity. With HF-RS, the expression levels of ileal TLR2 and Reg3g and cecal occludin, TLR2, TLR4, NOD1 and NOD2 were induced; whereas colonic concentrations of the inflammatory cytokine IL-17A declined...
July 24, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28736040/structural-characteristics-and-prebiotic-effects-of-semen-coicis-resistant-starches-type-3-prepared-by-different-methods
#3
Chen Bao, Hongliang Zeng, Yi Zhang, Longtao Zhang, Xu Lu, Zebin Guo, Song Miao, Baodong Zheng
In order to investigate the effects of different preparation methods on Semen coicis resistant starch, the structural properties and prebiotic effects of autoclaving treatment-purified S. coicis resistant starch (GP-SRS3), ultrasonic-autoclaving treatment-purified S. coicis resistant starch (UP-SRS3), enzyme-autoclaving treatment-purified S. coicis resistant starch (EP-SRS3) and microwave-moisture treatment-purified S. coicis resistant starch (MP-SRS3) were studied compared to high-amylose maize starch (HAMS)...
July 20, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28732856/thermoplastic-starch-nanohybrid-films-with-polyhedral-oligomeric-silsesquioxane
#4
I Martinez-Pardo, Robert A Shanks, Benu Adhikari, Raju Adhikari
Thermoplastic starch forms packaging films that have low gas permeability, but they are more permeable to water vapour and they are attacked by water. Our approach was to create surface and internal localised hydrophobicity using added reactive nano-materials to form nano-silica hybrids with emphasis on enhancing surface water resistance. Functionalization was via epoxy-POS, that were further linked to hydrophobic erucamide or an amphiphilic poly(oxyethylene-co-oxypropylene) mono-amine. High amylose thermoplastic starch was combined with mono-functionalised hepta-isobutyl polyhedral oligomeric silsesquioxane (POS)...
October 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28725229/the-synergistic-priming-effect-of-exogenous-salicylic-acid-and-h2o2-on-chilling-tolerance-enhancement-during-maize-zea-mays-l-seed-germination
#5
Zhan Li, Jungui Xu, Yue Gao, Chun Wang, Genyuan Guo, Ying Luo, Yutao Huang, Weimin Hu, Mohamed S Sheteiwy, Yajing Guan, Jin Hu
Chilling stress is an important constraint for maize seedling establishment in the field. To examine the role of salicylic acid (SA) and hydrogen peroxide (H2O2) in response to chilling stress, we investigated the effects of seed priming with SA, H2O2, and SA+H2O2 combination on maize resistance under chilling stress (13°C). Priming with SA, H2O2, and especially SA+H2O2 shortened seed germination time and enhanced seed vigor and seedling growth as compared with hydropriming and non-priming treatments under low temperature...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28724910/investigating-glycemic-potential-of-rice-by-unraveling-compositional-variations-in-mature-grain-and-starch-mobilization-patterns-during-seed-germination
#6
Maria Krishna de Guzman, Sabiha Parween, Vito M Butardo, Crisline Mae Alhambra, Roslen Anacleto, Christiane Seiler, Anthony R Bird, Chung-Ping Chow, Nese Sreenivasulu
Rice lines with slower starch digestibility provide opportunities in mitigating the global rise in type II diabetes and related non-communicable diseases. However, screening for low glycemic index (GI) in rice breeding programs is not possible due to time and cost constraints. This study evaluated the feasibility of using in vitro cooked grain amylolysis, starch mobilization patterns during seed germination, and variation in starch structure and composition in the mature seed to differentiate patterns of starch digestibility...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28720961/valorizing-guava-psidium-guajava-l-seeds-through-germination-induced-carbohydrate-changes
#7
Cheng Xian Ling, Ying Ping Chang
Guava seeds are produced as a waste product by the guava processing industry. Their high carbohydrate contents may suit the carbohydrate needs of the feed sector but their high dietary fiber content limits their feed value. The feed values of fruit seeds can be improved through germination, which involves the mobilization of nutrients through seed enzymes and alters the seed carbohydrate composition. The changes of selected carbohydrates in guava (Psidium guajava L.) seeds brought by germination to those in red bean (Vigna angularis) and winter wheat (Triticum aestivum L...
June 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28711449/intrarenal-flow-alterations-during-transition-from-euvolemia-to-intravascular-volume-expansion-in-heart-failure-patients
#8
Petra Nijst, Pieter Martens, Matthias Dupont, W H Wilson Tang, Wilfried Mullens
OBJECTIVES: The goal of this study was to assess: 1) the intrarenal flow in heart failure (HF) patients during the transition from euvolemia to intravascular volume overload; and 2) the relationship between intrarenal flow and diuretic efficiency. BACKGROUND: Intrarenal blood flow alterations may help to better understand impaired volume handling in HF. METHODS: Resistance index (RI) and venous impedance index (VII) were assessed in 6 healthy subjects, 40 euvolemic HF patients with reduced ejection fraction (HFrEF) and 10 HF patients with preserved ejection fraction (HFpEF)...
July 6, 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28705505/physicochemical-properties-in-vitro-digestibility-and-structural-elucidation-of-rs4-from-rice-starch
#9
Bilal Ahmad Ashwar, Navreen Jan, Adil Gani, Asima Shah, Farooq Ahmad Masoodi
Starches extracted from four different rice cultivars were phosphorylated by using STMP/STPP (sodium trimetasulphate/sodium tripolyphosphate) to make modified food starches with high contents of type 4 resistant starch (RS4). The results revealed 10- fold improvement in RS4 content by the phosphorylation of starch. The phosphorus % and DS values of rice starches ranged from 0.33 to 0.35, and 0.016 to 0.018, respectively. FT-IR spectroscopy showed reduction of OH stretching band at 3290cm(-1) and the appearance of P=O at 1244-1266cm(-1) which confirms crosslinking of starch with STMP/STPP...
July 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28699723/fermentation-isolation-purification-and-characterization-of-an-antitubercular-antibiotic-from-streptomyces-luridus-mtcc-4402
#10
S Anuradha, K Shravan Kumar, S Bhama, V Kishan
Tuberculosis, caused by Mycobacterium tuberculosis, continues to be a serious public health problem around the world, and it urges the need for development of new antitubercular drugs. An antibiotic producing strain, Streptomyces luridus (MTCC 4402) was earlier isolated from soil by our group. In this work, the phylogenic status was established by 16S rRNA gene sequence analysis. The strain was found to be active against clinically resistant strains. The culture was grown in shake flasks in a medium containing cornsteep liquor, glucose, CaCO(3), soyabean meal and starch...
September 2016: Indian Journal of Experimental Biology
https://www.readbyqxmd.com/read/28690287/stroke-volume-variation-svv-and-pulse-pressure-variation-ppv-as-indicators-of-fluid-responsiveness-in-sevoflurane-anesthetized-mechanically-ventilated-euvolemic-dogs
#11
Yusuke Endo, Jun Tamura, Tomohito Ishizuka, Takaharu Itami, Kiwamu Hanazono, Kenjiro Miyoshi, Tadashi Sano, Kazuto Yamashita, William W Muir
Changes in stroke volume variation (SVV) and pulse pressure variation (PPV) in response to fluid infusion were experimentally evaluated during vecuronium infusion and sevoflurane anesthesia in 5 adult, mechanically ventilated, euvolemic, beagle dogs. Sequential increases in central venous pressure (CVP; 3-7[baseline], 8-12, 13-17, 18-22 and 23-27 mmHg) were produced by infusing lactated Ringer's solution and 6% hydroxyethyl starch solution. Heart rate (beats/min), right atrial pressure (RAP, mmHg), pulmonary arterial pressure (PAP, mmHg), pulmonary capillary wedge pressure (PCWP, mmHg), transpulmonary thermodilution cardiac output (TPTDCO, L/min), stroke volume (SV, ml/beat), arterial blood pressure (ABP, mmHg), extravascular lung water (EVLW, ml), pulmonary vascular permeability index (PVPI, calculated), SVV (%), PPV (%) and systemic vascular resistance (SVR, dynes/sec/cm(5)) were determined at each predetermined CVP range...
July 10, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28682366/digestion-of-isolated-legume-cells-in-a-stomach-duodenum-model-three-mechanisms-limit-starch-and-protein-hydrolysis
#12
Rewati R Bhattarai, Sushil Dhital, Peng Wu, Xiao Dong Chen, Michael J Gidley
Retention of intact plant cells to the end of the small intestine leads to transport of entrapped macronutrients such as starch and protein for colonic microbial fermentation, and is a promising mechanism to increase the content of resistant starch in diets. However, the effect of gastro-intestinal bio-mechanical processing on the intactness of plant cells and the subsequent resistance to enzymatic digestion of intracellular starch and protein are not well understood. In this study, intact cells isolated from legume cotyledons are digested in a laboratory model which mimics the mechanical and biochemical conditions of the rat stomach and duodenum...
July 19, 2017: Food & Function
https://www.readbyqxmd.com/read/28677623/acute-consumption-of-resistant-starch-reduces-food-intake-but-has-no-effect-on-appetite-ratings-in-healthy-subjects
#13
Jorge L Ble-Castillo, Isela E Juárez-Rojop, Carlos A Tovilla-Zárate, Carlos García-Vázquez, Magda Z Servin-Cruz, Arturo Rodríguez-Hernández, Claudia I Araiza-Saldaña, Ana M Nolasco-Coleman, Juan C Díaz-Zagoya
Previous studies have shown the benefits of native banana starch (NBS) supplementation in improving glucose metabolism and reducing body weight (BW) in humans. However, the effect of this starch on appetite regulation is unknown. The aim of this study was to examine the effects of NBS rich resistant starch on subjective measurements of appetite, energy intake, and appetite hormones in healthy subjects. Postprandial glucose and insulin responses were also assessed. In a randomized, single-blind, crossover study, 28 healthy young subjects consumed a beverage containing either 40 g of NBS or 40 g of digestible corn starch (DCS) on two separate occasions...
July 4, 2017: Nutrients
https://www.readbyqxmd.com/read/28673844/optimization-of-paddy-parboiling-process-for-higher-starch-crystallinity-by-response-surface-methodology
#14
Soumya Ranjan Purohit, Pavuluri Srinivasa Rao
Paddy parboiling has received considerable attention as far as nutritional and milling improvement is concerned. Parboiling is also advantageous as it renders enhanced head rice yield and insect resistance. However, lower starch crystallinity of parboiled rice invites easy fungal infestation under favourable moisture and temperature conditions during storage. Additionally, parboiled rice is expected to possess higher resistant starch. Unfortunately, conventional processing conditions lead to either very less or moderate resistant starch content...
June 30, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28669072/free-and-immobilized-aspergillus-oryzae-sbs50-producing-protease-resistant-and-thermostable-phytase
#15
Sapna, Bijender Singh
Optimization for enhanced phytase production by Aspergillus oryzae SBS50 in submerged fermentation was investigated using Taguchi design. In first step design, starch, beef extract, magnesium sulphate, ferrous sulphate and Tween 80 were identified as significant factors affecting phytase production. These significant factors were further optimized at four different levels using a second Taguchi design and were observed that 1% starch, 2% beef extact, 3% Tween 80, 0.1% magnesium sulphate and 0.225% ferrous sulphate supported maximum phytase production (47,432 U/L)...
July 2017: 3 Biotech
https://www.readbyqxmd.com/read/28651695/dietary-salba-salvia-hispanica-l-improves-the-altered-metabolic-fate-of-glucose-and-reduces-increased-collagen-deposition-in-the-heart-of-insulin-resistant-rats
#16
Agustina Creus, Adriana Benmelej, Noelia Villafañe, Yolanda B Lombardo
This study reports the effects of dietary Salba (chia) seeds on the mechanisms underlying impaired glucose metabolism in the heart of dyslipemic insulin-resistant rats fed a sucrose-rich diet (SRD). Wistar rats were fed a SRD for 3 months. Afterwards, half the animals continued with the SRD; in the other half's diet chia seeds replaced corn oil (CO) for three months (SRD+chia). In the control group, corn starch replaced sucrose. The replacement of CO by chia seeds in the SRD restored the activities of key enzymes involved in heart glucose metabolism decreasing fatty acid oxidation...
June 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28624244/evolutionary-engineering-of-salt-resistant-chlamydomonas-sp-strains-reveals-salinity-stress-activated-starch-to-lipid-biosynthesis-switching
#17
Yuichi Kato, Shih-Hsin Ho, Christopher J Vavricka, Jo-Shu Chang, Tomohisa Hasunuma, Akihiko Kondo
The aim of this study was to improve biomass production of the green microalga Chlamydomonas sp. JSC4 under high salinity conditions. For this purpose, heavy ion beam-coupled mutagenesis and evolutionary engineering were performed using JSC4 as the parent strain. After long-term and continuous cultivation with high salinity, salt-resistant strains that grow well even in the presence of 7% sea salt were successfully obtained. Transcriptional analysis revealed inactivation of starch-to-lipid biosynthesis switching, which resulted in delayed starch degradation and decreased lipid content in the salt-resistant strains...
June 9, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28622652/deterioration-pattern-of-six-biodegradable-potentially-low-environmental-impact-mulches-in-field-conditions
#18
Marta M Moreno, Sara González-Mora, Jaime Villena, Juan A Campos, Carmen Moreno
Polyethylene plastic mulches are widely used in agriculture due to the countless advantages they have. However, the environmental problems associated with their use have led us to look for alternative mulch materials which degrade naturally and quickly, impact the environment less and function satisfactorily. To this end, biodegradable plastics and paper mulches are being used, but aspects related to their degradation should be studied more in-depth. This work provides the deterioration pattern of six biodegradable mulch materials (i...
June 13, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28606841/effects-of-adding-corn-oil-and-soy-protein-to-corn-starch-on-the-physicochemical-and-digestive-properties-of-the-starch
#19
Xu Chen, Xiao-Wei He, Bin Zhang, Xiong Fu, Jay-Lin Jane, Qiang Huang
This study aimed to understand effects of adding corn oil (CO) and soy protein (SP) to corn starch on the physicochemical properties and digestive rates of annealed starch complex and mechanisms of interactions between corn starch (CS), CO and SP. Binary and ternary blends were prepared using CS mixed with CO (10%, dsb) and/or SP (10%, dsb) and incubated in a water bath at 50°C for 14h. Results showed that more agglomerates of the granules were in the ternary blends. With the addition of CO and/or SP, the CS displayed a decreased pasting temperature, an increased peak viscosity and a decreased enthalpy change of amylose-lipid complex dissociation...
June 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28606521/enzyme-resistant-dextrins-from-potato-starch-for-potential-application-in-the-beverage-industry
#20
Kamila Kapusniak Jochym, Ewa Nebesny
The objective of this study was to produce soluble enzyme-resistant dextrins by microwave heating of potato starch acidified with small amounts of hydrochloric and citric acids and to characterize their properties. Twenty five samples were initially made and their solubility was determined. Three samples with the highest water solubility were selected for physico-chemical (dextrose equivalent, molecular weight distribution, pasting characteristics, retrogradation tendency), total dietary fiber (TDF) analysis, and stability tests...
September 15, 2017: Carbohydrate Polymers
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