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https://www.readbyqxmd.com/read/29339281/bifidogenic-effects-of-cordyceps-sinensis-fungal-exopolysaccharide-and-konjac-glucomannan-after-ultrasound-and-acid-degradation
#1
Ang-Xin Song, Yu-Heng Mao, Ka-Chai Siu, Jian-Yong Wu
The bifidogenic effects of exopolysaccharide (EPS) of a medicinal fungus (Cordyceps sinensis) and a well-known food polysaccharide konjac glucomannan (KGM) with different molecular weight (MW) ranges were evaluated through in vitro experiments in liquid cultures of Bifidobacteria. Native EPS and KGM were partially degraded with power ultrasound (US) to improve the water solubility, and further hydrolysed with trifluoroacetic acid to much lower MW. The acid-hydrolysed fractions (EPS-AH and KGM-AH) supported the growth of all five tested bifidobacterial species, while the US-degraded high MW fractions, EPS-US and KGM-US, could only slightly supported the growth of some species...
January 12, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29327417/konjac-flour-noodles-associated-with-gastric-outlet-obstruction
#2
Christine Jackman, Ryan Waddell, Leon Fisher, Michael Ben-Meir, Gabriel Blecher, Gerard S Goh, Katie Walker
No abstract text is available yet for this article.
January 12, 2018: Emergency Medicine Australasia: EMA
https://www.readbyqxmd.com/read/29258196/mussel-inspired-fabrication-of-konjac-glucomannan-poly-lactic-acid-cryogels-with-enhanced-thermal-and-mechanical-properties
#3
Lin Wang, Yi Yuan, Ruo-Jun Mu, Jingni Gong, Yongsheng Ni, Xin Hong, Jie Pang, Chunhua Wu
Three-dimensional nanofibers cryogels (NFCs) with both thermally-tolerant and mechanically-robust properties have potential for wide application in biomedical or food areas; however, creating such NFCs has proven to be extremely challenging. In this study, konjac glucomannan (KGM)/poly (lactic acid) (PLA)-based novel NFCs were prepared by the incorporation of the mussel-inspired protein polydopamine (PDA) via a facile and environmentally-friendly electrospinning and freeze-shaping technique. The obtained KGM/PLA/PDA (KPP) NFCs were characterized by field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and compressive and tensile test...
December 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29238029/characterization-of-konjac-ceramide-kcer-binding-to-sema3a-receptor-nrp1
#4
Seigo Usuki, Noriko Tamura, Tomohiro Tamura, Katsuyuki Mukai, Yasuyuki Igarashi
Konjac ceramide (kCer) can be prepared by a chemoenzymatic method as previously published (Usuki, S.; Tamura, N.; Sakai, S.; Tamura, T.; Mukai, K.; Igarashi, Y. Biochem. Biophys. Rep. 5, 160-167 (2016)). Thus prepared kCer showed an activation effect on Sema3A signaling pathway to induce phosphorylation of CRMP2 and microtubule depolymerizaion, resulting in opposing NGF-induced neurite outgrowth. In the present study, we have shown that kCer is a potential Sema3A-like ligand that has a competitive effect on Sema3A binding to a cell surface receptor Nrp1, but animal-type ceramides have no effect on Sema3A binding to Nrp1...
December 14, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/29238028/konjac-ceramide-kcer-regulates-ngf-induced-neurite-outgrowth-via-the-sema3a-signaling-pathway
#5
Seigo Usuki, Noriko Tamura, Kohei Yuyama, Tomohiro Tamura, Katsuyuki Mukai, Yasuyuki Igarashi
The tuber of the konjac plant is a source enriched with GlcCer (kGlcCer), and has been used as a dietary supplement to improve the dry skin and itching that are caused by a deficiency of epidermal ceramide. Previously, we showed chemoenzymatically prepared konjac ceramide has a neurite-outgrowth inhibitory effect that is very similar to that of Sema3A and is not seen with animal-type ceramides. While, it has been unclear whether kCer may act on Sema3A or TrkA signaling pathway. In the present study, we showed kCer induces phosphorylation of CRMP2 and microtubules depolymerization via Sema3A signaling pathway not TrkA...
December 14, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/29202887/the-effects-of-gelled-konjac-glucomannan-fibre-on-appetite-and-energy-intake-in-healthy-individuals-a-randomised-cross-over-trial
#6
Fei Au-Yeung, Elena Jovanovski, Alexandra L Jenkins, Andreea Zurbau, Hoang V T Ho, Vladimir Vuksan
Konjac glucomannan (KGM) is a viscous dietary fibre that can form a solid, low-energy gel when hydrated and is commonly consumed in a noodle form (KGM-gel). Increased meal viscosity from gel-forming fibres have been associated with prolonged satiety, but no studies to date have evaluated this effect with KGM-gel. Thus, our objective was to evaluate subsequent food intake and satiety of KGM-gel noodles when replacing a high-carbohydrate preload, in a dose-response manner. Utilising a randomised, controlled, cross-over design, sixteen healthy individuals (twelve females/four males; age: 26·0 (sd 11·8) years; BMI: 23·1 (sd 3·2) kg/m2) received 325 ml volume-matched preloads of three KGM-gel noodle substitution levels: (i) all pasta with no KGM-gel (1849 kJ (442 kcal), control), half pasta and half KGM-gel (1084 kJ (259 kcal), 50-KGM) or no pasta and all KGM-gel (322 kJ (77 kcal), 100-KGM)...
December 5, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/29183414/effects-of-soluble-fiber-inclusion-in-gestation-diets-with-varying-fermentation-characteristics-on-lactational-feed-intake-of-sows-over-two-successive-parities
#7
C Q Tan, H Q Sun, H K Wei, J J Tan, G Long, S W Jiang, J Peng
The effects of soluble fiber inclusion in gestation diets with varying fermentation characteristics (fermentation kinetics and short-chain fatty acids (SCFA)-profile) on lactational feed intake of sows and their piglet growth over two parities were investigated using an in vitro-in vivo methodology. After breeding, 90 multiparous Landrace sows were randomized to one of three experimental diets: the control (CON) diet, konjac flour (KF) diet or sugar beet pulp (SBP) diet. All diets had similar levels of net energy, CP, insoluble fiber and NDF, but KF and SBP diets had higher soluble fiber levels than the CON diet...
November 29, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/29182557/effect-of-dietary-acidolysis-oxidized-konjac-glucomannan-supplementation-on-serum-immune-parameters-and-intestinal-immune-related-gene-expression-of-schizothorax-prenanti
#8
Mingrui Chen, Shuyao Wang, Xue Liang, Donghui Ma, Li He, Yaowen Liu
The present study was conducted to investigate the effects of dietary acidolysis-oxidized konjac glucomannan (A-OKGM) (0%, 0.4%, 0.8%, and 1.6%) supplementation on the immunity and expression of immune-related genes in Schizothorax prenanti. After feeding for eight weeks, the serum and guts were used for measurement of biochemical parameters, and immune-related gene expression in the gut were also analyzed by real-time quantitative polymerase chain reaction (RT-qPCR). C-reactive protein and IgM levels were significantly higher in the A-OKGM fed groups than in the control group, regardless of the dosage...
November 28, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29169946/preparation-and-characterization-of-chitosan-collagen-peptide-oxidized-konjac-glucomannan-hydrogel
#9
Liangling Liu, Huigao Wen, Ziqie Rao, Chen Zhu, Meng Liu, Lian Min, Lihong Fan, Shengxiang Tao
In this paper, the microbial transglutaminase (MTGase) was used as a catalyst to graft the collagen peptide (COP) molecules on the amino group of chitosan to obtain water-soluble chitosan-collagen peptide (CS-COP) derivatives. The preparation of composite hydrogel was via the Schiff-base reaction between the amino of CS-COP and the aldehyde of oxidized konjac glucomannan (OKGM). The hydrogels were characterized by various techniques including Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM)...
November 20, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29153856/the-effect-of-viscous-soluble-fiber-on-blood-pressure-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#10
K Khan, E Jovanovski, H V T Ho, A C R Marques, A Zurbau, S B Mejia, J L Sievenpiper, V Vuksan
AIMS: Dietary fiber intake, especially viscous soluble fiber, has been established as a means to reduce cardiometabolic risk factors. Whether this is true for blood pressure remains controversial. A systematic review and meta-analysis of randomized controlled trials (RCTs) was conducted to investigate the effects of viscous soluble fiber supplementation on blood pressure and quantify the effect of individual fibers. DATA SYNTHESIS: MEDLINE, Embase, and Cochrane databases were searched...
October 7, 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/29123902/influence-of-body-position-during-heimlich-maneuver-to-relieve-supralaryngeal-obstruction-a-manikin-study
#11
Michitaro Ichikawa, So Oishi, Katsunori Mochizuki, Kenichi Nitta, Kazufumi Okamoto, Hiroshi Imamura
Aim: HASH(0x46ac7c8) To study the most effective body position for Heimlich maneuver. Methods: A choking simulation manikin was connected to a laryngeal model of a child or an adult, and a differential pressure transducer recorded the airway pressure and waveform during the maneuver. A konjac jelly was placed on the larynx to mimic complete supralaryngeal obstruction. The maneuver (five successive compressions) was carried out six times each in standing, prone, and supine positions...
October 2017: Acute Medicine & Surgery
https://www.readbyqxmd.com/read/29076996/a-review-on-konjac-glucomannan-gels-microstructure-and-application
#12
REVIEW
Dan Yang, Yi Yuan, Lin Wang, Xiaoshan Wang, Ruojun Mu, Jie Pang, Jianbo Xiao, Yafeng Zheng
Konjac glucomannan (KGM) has attracted extensive attention because of its biodegradable, non-toxic, harmless, and biocompatible features. Its gelation performance is one of its most significant characteristics and enables wide applications of KGM gels in food, chemical, pharmaceutical, materials, and other fields. Herein, different preparation methods of KGM gels and their microstructures were reviewed. In addition, KGM applications have been theoretically modeled for future uses.
October 27, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29074203/a-simply-enzymatic-hydrolysis-pretreatment-for-%C3%AE-mannanase-production-from-konjac-powder
#13
Shengping You, Juanjuan Ding, Yemei Dai, Ruizhe Xing, Wei Qi, Mengfan Wang, Rongxin Su, Zhimin He
Currently, the traditional fermentation using konjac powder for β-mannanase production presents operational difficulties and high energy consumption, because of the individual hot air sterilization for konjac powder. A simply enzymatic hydrolysis pretreatment for konjac powder was developed to solve the problems of the traditional process in a 7-L fermenter. In the new process, when hydrolysis yield of konjac powder was above 50%, the media became liquid state from gelatinous state and could be sterilized immediately, avoiding the hot air sterilization and solving the operational difficulties...
September 28, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29037672/rapid-and-non-invasive-detection-and-imaging-of-the-hydrocolloid-injected-prawns-with-low-field-nmr-and-mri
#14
Min Li, Bin Li, Weijia Zhang
Method development for monitoring economically motivated food adulteration is pivotal for preventing health problems caused by illegal food additives. In this work, low-field nuclear magnetic resonance (LF-NMR) spectroscopy and magnetic resonance imaging (MRI) was applied for the detection and mapping of adulterated prawns injected with different hydrocolloids including gelatin, carrageenan, agar, amorophophallus konjac and xanthan gum. The characteristic T2 fitting curves were obtained which can be used to tell apart adulterated prawns from normal ones...
March 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/28967225/effect-of-meat-enhancement-solutions-with-hydroxypropyl-methylcellulose-and-konjac-flour-on-texture-and-quality-attributes-of-pale-soft-and-exudative-pork
#15
B L Booren, M E Castell-Perez, R K Miller
The objective of this study was to determine whether addition of hydrocolloids, buffer ingredients, salt, and sodium phosphate improve the color, texture, and pH of normal and pale, soft, and exudative (PSE) meat. Specific solutions include potassium bicarbonate (KHCO), ammonium bicarbonate (NHHCO), hydroxypropyl methylcellulose (HPMC), and konjac flour (KF). Three studies were carried out. First, the stability and viscoelastic properties of the different solutions was determined. Second, fresh normal (pH 5...
October 2017: Journal of Texture Studies
https://www.readbyqxmd.com/read/28917879/laccase-tempo-oxidation-in-the-production-of-mechanically-strong-arabinoxylan-and-glucomannan-aerogels
#16
Kirsti Parikka, Ida Nikkilä, Leena Pitkänen, Abdul Ghafar, Tuula Sontag-Strohm, Maija Tenkanen
New wheat arabinoxylan and konjac glucomannan hydrogels and aerogels were prepared by hemiacetal crosslinking induced by laccase/TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl) -catalysed oxidation, which selectively converts the primary hydroxyl groups to aldehydes. The degree of oxidation of the product aldehydes was ca. 10% of the total carbohydrates of the polysaccharides, and the determination of storage and viscous moduli of the oxidised samples showed that they had formed true hydrogels. Two freezing methods for the hydrogels, conventional freezing and ice crystal templating, were investigated for aerogel production, the ice crystal templated products especially were mechanically strong in compression test against the ice crystals' growth direction...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821092/the-effect-of-temperature-on-the-colligative-properties-of-food-grade-konjac-gum-in-water-solutions
#17
Joanna Kruk, Kacper Kaczmarczyk, Anna Ptaszek, Urszula Goik, Paweł Ptaszek
This research paper presents the results of tests on the colligative properties of konjac gum chains in water solutions. For this purpose, the measurements of osmotic pressure and intrinsic viscosity of aqueous solutions, in the function of konjac gum concentration and temperature were carried out. The applied methods allowed for the determination of the second osmotic virial coefficients B2, which raised with the increase of temperature. It indicate that increase of temperature causes higher affinity of polysaccharide's chains to water...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821076/confirmation-and-measurement-of-hydrophobic-interaction-in-sol-gel-system-of-konjac-glucomannan-with-different-degree-of-deacetylation
#18
Chen Xin, Jian Chen, Hongshan Liang, Jiawei Wan, Jing Li, Bin Li
Fluorescence measurement was used as a tool to study the hydrophobic interaction in sol-gel system of konjac glucomannan (KGM) with different degree of deacetylation (DD). In the concentration from 0 to 10g/L, I1/I3 ratio of native KGM declined from 1.75 to 1.25. Before and after heating, the critical associating concentration of the native KGM was 0.60g/L and 0.95g/L respectively, but this value of deacetylated KGM (DD=32.58%) was 0.58g/L and 0.45g/L respectively. The addition of Na2SO4 and NaSCN exhibited more significant influence on deacetylated KGM compared with native KGM...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28772883/high-strength-konjac-glucomannan-silver-nanowires-composite-films-with-antibacterial-properties
#19
Jia Lei, Lei Zhou, Yongjian Tang, Yong Luo, Tao Duan, Wenkun Zhu
Robust, high-strength and environmentally friendly antibacterial composite films were prepared by simply blending konjac glucomannan (KGM) and silver nanowires (Ag NWs) in an aqueous system. The samples were then characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), thermal gravimetric analysis, mechanical property tests, Fourier transform infrared spectra (FT-IR), X-ray photoelectron spectroscopy (XPS) and antimicrobial tests. The results showed that there was a high ratio of Ag NWs uniformly distributed in the composite films, which was vital for mechanical reinforcement and stable antibacterial properties...
May 12, 2017: Materials
https://www.readbyqxmd.com/read/28739406/structural-characterization-and-properties-of-konjac-glucomannan-and-zein-blend-films
#20
Kai Wang, Kao Wu, Man Xiao, Ying Kuang, Harold Corke, Xuewen Ni, Fatang Jiang
A series of konjac glucomannan (KGM)/zein blend films were successfully prepared with zein in proportions 0-30%. The hydrophobicity of blend films were significantly stronger than pure KGM film, indicated by increased contact angle, swelling and solubility properties, and moisture absorption. Moreover, other properties including mechanical, thermal, water vapor and oxygen barrier were also found to be increased. FTIR indicated that hydrogen bond interactions and Maillard reaction occurred between KGM and zein molecules, and microstructural observations indicated that the aggregated zein was homogeneously dispersed in the KGM continuous matrix...
December 2017: International Journal of Biological Macromolecules
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