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https://www.readbyqxmd.com/read/28049087/sequestration-of-dyes-from-artificially-prepared-textile-effluent-using-rsm-ccd-optimized-hybrid-backbone-based-adsorbent-kinetic-and-equilibrium-studies
#1
Sukriti, Jitender Sharma, Amritpal Singh Chadha, Vaishali Pruthi, Prerna Anand, Jaspreet Bhatia, B S Kaith
Present work reports the synthesis of semi-Interpenetrating Network Polymer (semi-IPN) using Gelatin-Gum xanthan hybrid backbone and polyvinyl alcohol in presence of l-tartaric acid and ammonium persulphate as the crosslinker-initiator system. Reaction parameters were optimized with Response Surface Methodology (RSM) in order to maximize the percent gel fraction of the synthesized sample. Polyvinyl alcohol, l-Tartaric acid, ammonium persulphate, reaction temperature, time and pH of the reaction medium were found to make an impact on the percentage gel fraction obtained...
December 31, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/28044410/preparation-of-a-salecan-poly-2-acrylamido-2-methylpropanosulfonic-acid-co-2-methacryloxy-ethyl-trimethylammonium-chloride-semi-ipn-hydrogel-for-drug-delivery
#2
Xiaoliang Qi, Junjian Li, Wei Wei, Ting Su, Gancheng Zuo, Xihao Pan, Jianfa Zhang, Wei Dong
Salecan is a water-soluble bacterial polysaccharide consisting of glucopyranosyl units linked by α-1,3 and β-1,3 glycosidic bonds. salecan is suitable for the development of hydrogels for biomedical applications, given its outstanding physicochemical and biological profiles. In this study we designed a new semi-interpenetrating polymer network hydrogel that introduces the salecan polysaccharide into a stimuli-responsive poly(2-acrylamido-2-methylpropanosulfonic acid-co-[2-(methacryloxy)ethyl]trimethylammonium chloride) (PAM) hydrogel matrix for controlled insulin release...
January 3, 2017: ChemMedChem
https://www.readbyqxmd.com/read/28041916/preparation-and-characterization-of-oxidized-starch-poly-n-n-dimethylaminoethyl-methacrylate-semi-ipn-cryogels-and-in-vitro-controlled-release-evaluation-of-indomethacin
#3
Diana Felicia Apopei Loghin, Gabriela Biliuta, Sergiu Coseri, Ecaterina Stela Dragan
Fabrication of novel semi-interpenetrating polymer network (semi-IPN) cryogels by cross-linking polymerization of N,N-dimethylaminoethyl methacrylate (DMAEM) in the presence of either oxidized potato starch (OPS) or oxidized wheat starch (OWS) and their characterization are presented in the paper. The influence of the nature of entrapped polymer on the properties of the composite cryogels was evaluated by the swelling kinetics, FT-IR spectroscopy, scanning electron microscopy, and response at external stimuli such as temperature, pH, and ionic strength...
December 29, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28026935/thermoresponsive-semi-ipn-hydrogel-microfibers-from-continuous-fluidic-processing-with-high-elasticity-and-fast-actuation
#4
Yan Liu, Kaihuan Zhang, Jinghong Ma, G Julius Vancso
Hydrogels with rapid and strong response to external stimuli and possessing high elasticity and strength have been considered as platform materials for numerous applications, e.g., in biomaterials engineering. Thermoresponsive hydrogels based on semi-interpenetrating polymer networks (semi-IPN) featuring N-isopropylacrylamide with copolymers of poly(N-isopropylacrylamide-co-hydroxyethyl methacrylate) p(NIPAM-HEMA) chains are prepared and described. The copolymer was characterized by FTIR, NMR, and GPC. The semi-IPN structured hydrogel and its responsive properties were evaluated by dynamic mechanical measurements, SEM, DSC, equilibrium swelling ratio, and dynamic deswelling tests...
December 27, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28025812/the-anatomy-and-physiology-of-eyeblink-classical-conditioning
#5
Kaori Takehara-Nishiuchi
This chapter reviews the past research toward identifying the brain circuit and its computation underlying the associative memory in eyeblink classical conditioning. In the standard delay eyeblink conditioning paradigm, the conditioned stimulus (CS) and eyeblink-eliciting unconditioned stimulus (US) converge in the cerebellar cortex and interpositus nucleus (IPN) through the pontine nuclei and inferior olivary nucleus. Repeated pairings of CS and US modify synaptic weights in the cerebellar cortex and IPN, enabling IPN neurons to activate the red nucleus and generate the conditioned response (CR)...
December 27, 2016: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/28012776/a-novel-in-feed-delivery-platform-applied-for-oral-dna-vaccination-against-ipnv-enables-high-protection-in-atlantic-salmon-salmon-salar
#6
Miguel Reyes, Cesar Ramírez, Ivan Ñancucheo, Ricardo Villegas, Guillermo Schaffeld, Luis Kiman, Javier Gonzalez, Patricio Oyarzun
BACKGROUND: DNA vaccination has emerged as a promising tool against infectious diseases of farmed fish. Oral delivery allows stress-free administration that is ideal for mass immunization and of paramount importance for infectious pancreatic necrosis (IPN) and other viral disease that affect young salmonids and cause economic losses in aquaculture worldwide. METHODS: We describe the development and in vivo assessment of an "in-feed" formulation strategy for oral immunization with liposomal DNA vaccines, by delivering a vaccine construct coding for an immunogenic region of the VP2 capsid protein...
December 21, 2016: Vaccine
https://www.readbyqxmd.com/read/27960330/reshaping-lithium-plating-stripping-behavior-via-bifunctional-polymer-electrolyte-for-room-temperature-solid-li-metal-batteries
#7
Xian-Xiang Zeng, Ya-Xia Yin, Nian-Wu Li, Wen-Cheng Du, Yu-Guo Guo, Li-Jun Wan
High-energy rechargeable Li metal batteries are hindered by dendrite growth due to the use of a liquid electrolyte. Solid polymer electrolytes, as promising candidates to solve the above issue, are expected to own high Li ion conductivity without sacrificing mechanical strength, which is still a big challenge to realize. In this study, a bifunctional solid polymer electrolyte exactly having these two merits is proposed with an interpenetrating network of poly(ether-acrylate) (ipn-PEA) and realized via photopolymerization of ion-conductive poly(ethylene oxide) and branched acrylate...
December 14, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27933324/effect-of-aqueous-storage-on-original-and-repair-bond-strength-and-residual-monomer-release-of-fiberreinforced-composites
#8
Diana Wolff, Michael Coupek, Ralf Erber, Tanja Krueger, Johannes Krisam, Hans Joerg Staehle, Cornelia Frese
PURPOSE: To evaluate the effects of aqueous storage on shear bond strength (SBS) and monomer release of fiberreinforced composites (FRCs). MATERIALS AND METHODS: Four unidirectional FRCs were tested, including one semi-interpenetrating polymer network (IPN) (ES, everStick) and three cross-linked polymer (CLP) FRCs (GT, GrandTec; TF, TenderFiber; DP, Dentapreg). The SBS of samples of original resin to fresh FRC with an intact oxygen inhibition layer (n = 30/group) and repair resin to FRC after surface treatment (n = 30/group) was evaluated after 6 and 12 months of storage in artificial saliva...
December 8, 2016: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/27931029/selective-necrosectomy-for-infected-pancreatic-necrosis
#9
Ola Ahmed, Claire L Donohoe, Daragh B Murphy, Brian J Marsh, John Conneely, Gerry P McEntee
BACKGROUND: Until recently, a diagnosis of infected pancreatic necrosis (IPN) warranted necrosectomy, which was associated with high morbidity and mortality rates greater than 20%. Preoperative percutaneous drainage delayed the need for necrosectomy with improved outcomes. METHODS: In 2008, this institution changed its approach to the management of such cases opting instead for percutaneous drainage with selective deferred necrosectomy. A total of 38 consecutive patients with IPN from January 2008 to December 2014 were included...
December 9, 2016: Digestive Surgery
https://www.readbyqxmd.com/read/27890353/anxiety-and-nicotine-dependence-emerging-role-of-the-habenulo-interpeduncular-axis
#10
REVIEW
Susanna Molas, Steven R DeGroot, Rubing Zhao-Shea, Andrew R Tapper
While innovative modern neuroscience approaches have aided in discerning brain circuitry underlying negative emotional behaviors including fear and anxiety responses, how these circuits are recruited in normal and pathological conditions remains poorly understood. Recently, genetic tools that selectively manipulate single neuronal populations have uncovered an understudied circuit, the medial habenula (mHb)-interpeduncular (IPN) axis, that modulates basal negative emotional responses. Interestingly, the mHb-IPN pathway also represents an essential circuit that signals heightened anxiety induced by nicotine withdrawal...
November 24, 2016: Trends in Pharmacological Sciences
https://www.readbyqxmd.com/read/27865957/starch-functionalized-biodegradable-semi-ipn-as-a-ph-tunable-controlled-release-platform-for-memantine
#11
Sayan Ganguly, Tushar Maity, Subhadip Mondal, Poushali Das, Narayan C Das
Sequentially prepared semi-interpenetrating polymer network (semi-IPN) has been developed here via Michael type addition of acrylic acid (AA) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) on to starch. The semi-IPN hydrogel have proficiency in fast water imbibition towards gel network and swelling tunable character with pH alteration in ambient condition. The synthesized gel has been characterized by Fourier transformed infrared spectroscopy (FTIR) to confirm Michael type grafting of monomers on to starch...
February 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27858313/complete-genomic-sequence-of-an-infectious-pancreatic-necrosis-virus-isolated-from-rainbow-trout-oncorhynchus-mykiss-in-china
#12
Feng Ji, Jing-Zhuang Zhao, Miao Liu, Tong-Yan Lu, Hong-Bai Liu, Jiasheng Yin, Li-Ming Xu
Infectious pancreatic necrosis (IPN) is a significant disease of farmed salmonids resulting in direct economic losses due to high mortality in China. However, no gene sequence of any Chinese infectious pancreatic necrosis virus (IPNV) isolates was available. In the study, moribund rainbow trout fry samples were collected during an outbreak of IPN in Yunnan province of southwest China in 2013. An IPNV was isolated and tentatively named ChRtm213. We determined the full genome sequence of the IPNV ChRtm213 and compared it with previously identified IPNV sequences worldwide...
November 18, 2016: Virus Genes
https://www.readbyqxmd.com/read/27847559/impaired-norepinephrine-regulation-of-monocyte-inflammatory-cytokine-balance-in-heart-failure
#13
Tien Mh Ng, Myron L Toews
AIM: To evaluate the effect of norepinephrine on inflammatory cytokine expression in ex vivo human monocytes and monocytic THP-1 cells. METHODS: For human monocyte studies, cells were isolated from 12 chronic heart failure (HF) (66 ± 12 years, New York Heart Association functional class III-IV, left ventricular ejection fraction 22% ± 9%) and 14 healthy subjects (66 ± 12 years). Monocytes (1 × 10(6)/mL) were incubated with lipopolysaccharide (LPS) 100 ng/mL, LPS + norepinephrine (NE) 10(-6) mol/L or neither (control) for 4 h...
October 26, 2016: World Journal of Cardiology
https://www.readbyqxmd.com/read/27842806/synthesis-of-dual-responsive-carbohydrate-polymer-based-ipn-microbeads-for-controlled-release-of-anti-hiv-drug
#14
S Eswaramma, K S V Krishna Rao
The present study aims at preparation of dual responsive interpenetrating polymer network hydrogel microbeads from sodium alginate and functionally modified guar gum. Guar gum was modified by graft copolymerization using N-vinylcaprolactam, the maximum % grafting 123.2, obtained at different optimized conditions. The graft copolymer was blended with sodium alginate to form hydrogel microbeads by emulsion crosslinking method using glutaraldehyde as crosslinker. Zidovudine, an anti-HIV drug was encapsulated with 68% encapsulation efficiency...
January 20, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27832819/negative-pressure-irrigation-and-endoscopic-necrosectomy-through-man-made-sinus-tract-in-infected-necrotizing-pancreatitis-a-technical-report
#15
Zhihui Tong, Lu Ke, Baiqiang Li, Gang Li, Jing Zhou, Xiao Shen, Weiqin Li, Ning Li, Jieshou Li
BACKGROUND: In recent years, a step-up approach based on minimally invasive techniques was recommended by latest guidelines as initial invasive treatment for infected pancreatic necrosis (IPN). In this study, we aimed to describe a novel step-up approach for treating IPN consisting of four steps including negative pressure irrigation (NPI) and endoscopic necrosectomy (ED) as a bridge between percutaneous catheter drainage (PCD) and open necrosectomy METHODS: A retrospective review of a prospectively collected internal database of patients with a diagnosis of IPN between Jan, 2012 to Dec, 2012 at a single institution was performed...
November 10, 2016: BMC Surgery
https://www.readbyqxmd.com/read/27818845/rate-dependent-stiffness-and-recovery-in-interpenetrating-network-hydrogels-through-sacrificial-metal-coordination-bonds
#16
Matthew S Menyo, Craig J Hawker, J Herbert Waite
Four-arm poly(ethylene glycol) (PEG) star polymers modified with 3-hydroxy-4-pyridinone (HOPO) end groups were shown to form transient, coordination networks upon addition of trivalent cations In(3+), Fe(3+), and Al(3+). These coordination-based hydrogels exhibited high activation energies of viscoelasticity (34 kT) and characteristic bond lifetimes tunable over 2 orders of magnitude and could be incorporated into poly(hydroxyethylacrylamide)-based covalent scaffolds to create interpenetrating network hydrogels...
November 17, 2015: ACS Macro Letters
https://www.readbyqxmd.com/read/27809475/elastomeric-light-emitting-polymer-enhanced-by-interpenetrating-networks
#17
Huier Gao, Si Chen, Jiajie Liang, Qibing Pei
Conjugated polymers containing long-chain alkyl side groups for solubility are generally unstretchable: large strain induces crack formation, fracture, or plastic deformation. When the polymers are stretched to reorient the conjugated chains along the stretching direction, high dichroic ratio is observed both for absorption of the ground state and radiative decay of the excited state. Here an interpenetrating polymer network (IPN) approach is reported to impart elastomeric deformability to a conjugated polymer...
November 30, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27806778/-experience-of-minimal-access-video-assisted-retroperitoneal-debridement-in-treatment-of-infected-pancreatic-necrosis
#18
J Feng, Z W Liu, S W Cai, H H Jiao, J D Du, X L Xin, J Y Chen, P F Wang, L He, S C Lu, Y Y Xiao, M Q Wang
Objective: To explore the experience of minimal-access video-assisted retroperitoneal debridement in treatment of infected pancreatic necrosis(IPN). Methods: A retrospective review was performed on 12 patients with IPN who underwent minimal-access video-assisted retroperitoneal debridement between June 2008 and June 2013 in People's Liberation Army General Hospital and First Affiliated Hospital of People's Liberation Army General Hospital, respectively.There were 10 male patients and 2 female patients aging from 33 to 55 years with mean age of(43±8)years...
November 1, 2016: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/27793697/development-and-experience-dependent-plasticity-in-the-dorsomedial-habenula
#19
Peter Koppensteiner, Christopher Galvin, Ipe Ninan
Of the two major subdivisions of the habenula, the medial and lateral nuclei, the medial habenula is the least understood in terms of synaptic transmission, intrinsic properties and plasticity. The medial habenula (MHb) is composed of glutamatergic neurons which receive the majority of their inputs from the septal region and project predominantly to the interpeduncular nucleus (IPN). To understand the synaptic transmission, we studied both glutamatergic and GABAergic synaptic transmission in the dorsal region of the medial habenula (dMHb)...
December 2016: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/27774684/pcl-plla-semi-ipn-shape-memory-polymers-smps-degradation-and-mechanical-properties
#20
Lindsay N Woodard, Vanessa M Page, Kevin T Kmetz, Melissa A Grunlan
Thermoresponsive shape memory polymers (SMPs) based on poly(ε-caprolactone) (PCL) whose shape may be actuated by a transition temperature (T trans ) have shown utility for a variety of biomedical applications. Important to their utility is the ability to modulate mechanical and degradation properties. Thus, in this work, SMPs are formed as semi-interpenetrating networks (semi-IPNs) comprised of a cross-linked PCL diacrylate (PCL-DA) network and thermoplastic poly(l-lactic acid) (PLLA). The semi-IPN uniquely allows for requisite crystallization of both PCL and PLLA...
December 2016: Macromolecular Rapid Communications
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