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https://www.readbyqxmd.com/read/29154877/investigation-the-effect-of-graphene-oxide-and-gelatin-starch-weight-ratio-on-the-properties-of-starch-gelatin-go-nanocomposite-films-the-rsm-study
#1
Shima Afshar, Hossein Banisadi
In this study, we reported the design and fabrication of starch/gelatin/graphene oxide biodegradable nanocomposite films with proper potential for food packaging applications. The experiments were designed using Design Expert software via RSM by defining gelatin/starch weight ratio (G/S wt. ratio) and graphene oxide (GO) wt.% as process parameters affecting on the properties of the prepared films. The optimization was done and various properties of the optimum film were investigated. The XRD and SEM images confirmed that GO layers could intercalate in the starch/gelatin matrix and proper dispersion of nanofillers in the matrix obtained via solution casting method...
November 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29152461/use-of-toll-like-receptor-assays-for-the-detection-of-bacterial-contaminations-in-icodextrin-batches-released-for-peritoneal-dialysis
#2
Hêla Hacine-Gherbi, Agnès Denys, Mathieu Carpentier, Arnaud Heysen, Pierrick Duflot, Pierre Lanos, Fabrice Allain
Icodextrin is a starch derivative used for preparing solutions of peritoneal dialysis. Unfortunately, peptidoglycans (PGN) and lipopolysaccharides (LPS) have been reported to contaminate certain icodextrin batches and to contribute to the development of sterile peritonitis. The decision of selecting or rejecting icodextrin batches is however difficult, because of limitations in the detection of these bacterial contaminants. Besides monocyte activation tests of cytokine release, a number of bio-assays using stably TLR-transfected cell lines have been developed...
2017: Toxicology Reports
https://www.readbyqxmd.com/read/29151081/association-between-standard-laboratory-and-functional-tests-of-coagulation-in-dilutional-coagulopathy-an-in-vitro-study
#3
L J Krzych, P F Czempik
Standard laboratory tests (SLTs) of coagulation are in common use in clinical practice. We aimed to determine the association between SLTs and functional tests of coagulation in blood samples diluted with balanced crystalloid and colloid solutions in an ex vivo setting. The study group comprised 32 healthy young male volunteers. Whole blood samples were diluted at a 4:1 ratio with balanced crystalloid (Plasmalyte®) and two balanced colloids, 6% hydroxyethyl starch 130/0.4 (Volulyte®) and succinylated gelatin (Geloplasma®)...
August 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/29150842/the-effect-of-6-hydroxyethyl-starch-130-0-4-on-acute-kidney-injury-in-paediatric-cardiac-surgery-a-prospective-randomised-trial
#4
H-W Oh, J-H Lee, H-C Kim, E-H Kim, I-K Song, H-S Kim, J-T Kim
We have evaluated the effect of a colloid solution on acute kidney injury in paediatric cardiac surgery. A total of 195 patients were ramdomly divided into an hydroxyethyl starch group and a control group. In the starch group, 6% hydroxyethyl starch 130/0.4 (Volulyte(®) ) was used as the primary fluid for volume resuscitation but was limited to 30 ml.kg(-1) . In the control group, only crystalloid fluid was used during the peri-operative period. The incidence of acute kidney injury, peri-operative transfusion, clinical outcomes and laboratory data were compared...
November 17, 2017: Anaesthesia
https://www.readbyqxmd.com/read/29146428/preparative-fractionation-of-dextrin-by-polyethylene-glycol-effects-of-initial-dextrin-concentration-and-ph
#5
Xiuting Hu, Yu Wang, Chengmei Liu, Zhengyu Jin, Yaoqi Tian
Polyethylene glycol (PEG) was further applied for fractionating dextrin prepared from cassava starch. The initial dextrin concentration and pH of the dextrin solutions were crucially considered in this study with the average molecular-weight dispersity (DMa) as the index. The results showed that the initial dextrin concentration significantly affected the mass fraction and the molecular weight distribution of each dextrin fraction obtained from gradient PEG precipitation. However, the initial dextrin concentration, which ranged from 0...
November 11, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29137998/effect-of-temperature-and-selected-sugars-on-dilute-solution-properties-of-two-hairless-canary-seed-starches-compared-with-wheat-starch
#6
Ali Heydari, Seyed Mohammad Ali Razavi, Mahdi Irani
In this paper, influence of temperature (25, 35, 45 and 55°C) and sugars (sucrose and lactose) at different concentrations (0, 5, 10 and 15%) on some molecular parameters of starches from two canary seed varieties (C05041 and CDC Maria) in the dilute regime were investigated in comparison to wheat starch (WS). The results indicated that the intrinsic viscosity ([η]) values of C05041, CDC Maria and WS samples were 1.42, 1.46 and 1.70 dl/g at 25°C, respectively. Intrinsic viscosity of selected starches decreased with an increase in temperature, but the effect of high temperatures were somewhat unnoticeable...
November 11, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29137091/the-effects-of-hypervolemic-infusion-on-microcirculation-perfusion-of-patients-during-laparoscopic-colorectal-surgery
#7
Yunxin Deng, Qianlin Zhu, Buwei Yu, Minhua Zheng, Jue Jin
The aim of this study is to assess the effects of hypervolemic infusion with different solutions on microcirculation perfusion during laparoscopic colorectal surgery.Thirty-six patients were randomly divided into Ringer lactate solution [RL] group, succinylated gelatin injection [Gel] group, and hypertonic saline hydroxyethyl starch 40 injection [HS] group. Hypervolemic infusion was performed during the induction period of general anesthesia. Arterial blood-gas parameters, noninvasive hemodynamics, gastric tonometry values, and central venous pressure (CVP) were compared at baseline (T1); the end of hypervolemic infusion (T2); 5 min (T3), 15 min (T4), 30 min (T5), and 60 min (T6) during pneumoperitoneum; 5 min (T7), 15 min (T8), and 25 min (T9) after pneumoperitoneum...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29133086/role-of-entanglement-concentration-in-dynamic-viscoelasticity-and-film-forming-property-of-cereal-starches
#8
Li Guo
Entanglement concentration (ce, w/v) means the onset of overlap and interpenetration of random-coil chains in a macromolecule solution. The effects of ce on the dynamic viscoelasticity and film-forming property of cereal starches were investigated. The results showed that ce affected significantly the ratio of crystalline to amorphous regions of normal rice starch, waxy rice starch, normal maize starch and wheat starch because the absorbance ratio (1047cm(-1)/1022cm(-1)) increased more obviously at concentrations increasing from 0...
November 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29113432/graphene-oxide-filled-lignin-starch-polymer-bionanocomposite-structural-physical-and-mechanical-studies
#9
Meryem Aqlil, Annie Moussemba Nzenguet, Younes Essamlali, Asmae Snik, Mohamed Larzek, Mohamed Zahouily
In this study, graphene oxide (GO) was investigated as a potential nanoreinforcing agent in starch/lignin (ST/L) biopolymer matrix. Bionanocomposite films based on ST/L blend matrix and GO were prepared by solution-casting technique of the corresponding film-forming solution. The structures, morphologies, and properties of bionanocomposite films were characterized by Fourier transform infrared (FTIR), thermal gravimetric analysis (TGA), ultraviolet-visible (UV-vis), SEM, and tensile tests. The experimental results showed that content of GO have a significant influence on the mechanical properties of the produced films...
November 17, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29111739/competitive-removal-of-cu-ii-and-cd-ii-from-water-using-a-biocomposite-hydrogel
#10
Jayabrata Maity, Samit Kumar Ray
With an objective to improve the adsorption properties of a synthetic hydrogel, potato starch (PS) was incorporated in the ter-copolymer (TP) of acrylic acid (AA), acrylamide (AM), and bicarboxylic itaconic acid (IA) during polymerization of the monomers. The resulting TP-PS composite hydrogels were characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), nuclear magnetic resonance (NMR), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX), and rheological properties...
November 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29099424/colloids-and-the-microcirculation
#11
Huaiwu He, Dawei Liu, Can Ince
Colloid solutions have been advocated for use in treating hypovolemia due to their expected effect on improving intravascular retention compared with crystalloid solutions. Because the ultimate desired effect of fluid resuscitation is the improvement of microcirculatory perfusion and tissue oxygenation, it is of interest to study the effects of colloids and crystalloids at the level of microcirculation under conditions of shock and fluid resuscitation, and to explore the potential benefits of using colloids in terms of recruiting the microcirculation under conditions of hypovolemia...
November 1, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29094671/reducing-agent-can-be-omitted-in-the-incubation-medium-of-the-batch-in-vitro-fermentation-model-of-the-pig-intestines
#12
C Poelaert, G Nollevaux, C Boudry, B Taminiau, C Nezer, G Daube, Y-J Schneider, D Portetelle, A Théwis, J Bindelle
Over the past decade, in vitro methods have been developed to study intestinal fermentation in pigs and its influence on the digestive physiology and health. In these methods, ingredients are fermented by a bacterial inoculum diluted in a mineral buffer solution. Generally, a reducing agent such as Na2S or cysteine-HCl generates the required anaerobic environment by releasing metabolites similar to those produced when protein is fermented, possibly inducing a dysbiosis. An experiment was conducted to study the impact of two reducing agents on results yielded by such in vitro fermentation models...
November 2, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/29083113/hydroxyethyl-starch-and-kidney-function-a-retrospective-study-in-patients-undergoing-therapeutic-plasma-exchange
#13
Muthuchellappan Radhakrishnan, Akshay Batra, Sundar Periyavan, Mariamma Philip, Vivek Anand
PURPOSE: Hydroxyethyl starch (HES) and albumin are used as replacement fluids during therapeutic plasma exchange (TPE). HES solutions are no longer recommended in critically ill patients due to its effect on kidneys and coagulation. In this retrospective study, we tried to look at the association between cumulative HES administration and kidney function in patients undergoing TPE. METHODS: Transfusion medicine department register was scrutinized to identify adult patients who had completed at least 5 cycles of TPE during the period June 2014-May 2015...
October 30, 2017: Journal of Clinical Apheresis
https://www.readbyqxmd.com/read/29054631/-green-technology-bio-stimulation-by-an-electric-field-for-textile-reactive-dye-contaminated-agricultural-soil
#14
Sivasankar Annamalai, Manikandan Santhanam, Subbulakshmi Selvaraj, Maruthamuthu Sundaram, Kannan Pandian, Marta Pazos
The aim of the study is to degrade pollutants as well as to increase the fertility of agricultural soil by starch enhancing electrokinetic (EKA) and electro-bio-stimulation (EBS) processes. Starch solution was used as an anolyte and voltage gradient was about 0.5V/cm. The influence of bacterial mediated process was evaluated in real contaminated farming soil followed by pilot scale experiment. The in-situ formation of β-cyclodextrin from starch in the treatments had also influence on the significant removal of the pollutants from the farming soil...
October 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29054526/one-step-synthesis-of-starch-silver-nanoparticle-solution-and-its-application-to-antibacterial-paper-coating
#15
Jeyoung Jung, Gownolla Malegowd Raghavendra, Dowan Kim, Jongchul Seo
Antibacterial starch-silver nanoparticles (ST-AgNPs) for use as coating solutions were prepared in a single step by ultrasonicating a mixture of starch, silver nitrate, and distilled water. The starch was used as an eco-friendly and inexpensive reducing agent. UV-vis spectra and transmission electron microscopy indicated that our single-step process was effective for synthesizing starch-based coating solution with AgNPs. Further, the as-prepared coating solution with AgNPs was applied to expand the application of paper for antibacterial packaging...
October 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29052006/risk-factors-for-and-the-prevention-of-acute-kidney-injury-after-abdominal-surgery
#16
REVIEW
Yongbo An, Kai Shen, Yingjiang Ye
Postoperative acute kidney injury in patients undergoing abdominal surgery is not rare and often results in bad outcomes for patients. The incidence of postoperative acute kidney injury is hard to evaluate reliably due to its non-unified definitions in different studies. Risk factors for acute kidney injury specific to abdominal surgery include preoperative renal insufficiency, intraabdominal hypertension, blood transfusion, bowel preparation, perioperative dehydration, contrast agent and nephrotoxic drug use...
October 19, 2017: Surgery Today
https://www.readbyqxmd.com/read/29050601/preparation-of-cationized-starch-from-food-industry-waste-biomass-and-its-utilization-in-sulfate-removal-from-aqueous-solution
#17
Katja Lappalainen, Johanna Kärkkäinen, Matti Niemelä, Harri Vartiainen, Olli Rissanen, Hanne Korva
In this work, untreated starch-rich potato peel waste was used as a starting material in preparation of cationized starch (CS)(1) in water solution with 2-chloro-3-hydroxypropyltrimethylammonium chloride (CHPTAC) as the cationization reagent. The impact of various factors (activation time, temperature, reaction time, the amount of CHPTAC and NaOH) on the degree of substitution (DS) of CS was studied by using experimental design. The DS values were determined by (1)H NMR. The highest DS (0.40) was obtained when the reaction time was 8h, temperature 30°C, the molar ratio of CHPTAC and NaOH to AGU 3 and 3...
December 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29035463/effect-of-balanced-crystalloid-gelatin-and-hydroxyethyl-starch-on-coagulation-detected-by-rotational-thromboelastometry-in-vitro
#18
Silvie Sevcikova, Tomas Vymazal, Miroslav Durila
BACKGROUND: Fluid resuscitation with crystalloid and colloid solutions is a common treatment in perioperative medicine. However, a variety of unbalanced or balanced solutions are used in clinical practice and there is still vivid debate going on regarding selection of optimal fluid with minimal negative effect on coagulation to minimize bleeding and blood transfusion requirements. The aim of the study was to investigate adverse effects of balanced crystalloids and colloids on coagulation measured by thromboelastometry in vitro...
October 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/29025649/room-temperature-preparation-of-fluorescent-starch-nanoparticles-from-starch-dopamine-conjugates-and-their-biological-applications
#19
Yingge Shi, Dazhuang Xu, Meiying Liu, Lihua Fu, Qing Wan, Liucheng Mao, Yanfeng Dai, Yuanqing Wen, Xiaoyong Zhang, Yen Wei
Fluorescent organic nanoparticles (FONs) have been regarded as the promising candidates for biomedical applications owing to their well adjustment of chemical structure and optical properties and good biological properties. However, the preparation of FONs from the natural derived polymers has been rarely reported thus far. In current work, we reported a novel strategy for preparation of FONs based on the self-polymerization of starch-dopamine conjugates and polyethyleneimine in rather mild experimental conditions, including air atmosphere, aqueous solution, absent catalysts and at room temperature...
January 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29023716/production-of-cornstarch-granules-enriched-with-quercetin-liposomes-by-aggregation-of-particulate-binary-mixtures-using-high-shear-process
#20
Taíse Toniazzo, Helena Galeskas, Gustavo C Dacanal, Samantha C Pinho
Liposomes are colloidal structures capable of encapsulating, protecting, and releasing hydrophobic bioctives, as flavonoids. Quercetin is a flavonoid with high antioxidant activity that provides benefits to health. The wet-agglomeration processes in high-shear equipment are useful to produce granules from binary mixtures, obtaining a powder with homogeneous composition and without segregation or elutriation of fine particles. In this study, the binary mixtures containing microparticles of native cornstarch and nanoparticles of quercetin liposomes were aggregated in high-shear batches, using maltodextrin solution as binder agent...
October 12, 2017: Journal of Food Science
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