Read by QxMD icon Read

organ regeneration

Rodrigo de Abreu Domingos, Fabiana Valéria da Fonseca
The oil refinery industry seeks solutions to reduce its water uptake and consumption by encouraging the reuse of internal streams and wastewater from treatment systems. After conventional treatment the petroleum refinery wastewater still contains a considerable quantity of recalcitrant organics and the adsorption on activated carbon is currently used in Brazilian refineries, although it is still expensive due to the difficulty of its regeneration. This study evaluated the use of adsorbent and ion exchange resins for the removal of organic matter from refinery wastewater after conventional treatment in order to verify its feasibility, applying successive resin regenerations and comparing the results with those obtained for activated carbon process...
March 12, 2018: Journal of Environmental Management
Saurabh Sudha Dhiman, Namita Shrestha, Aditi David, Neha Basotra, Glenn R Johnson, Bhupinder S Chadha, Venkataramana Gadhamshetty, Rajesh K Sani
Residual solid and liquid streams from the one-pot CRUDE (Conversion of Raw and Untreated Disposal into Ethanol) process were treated with two separate biochemical routes for renewable energy transformation. The solid residual stream was subjected to thermophilic anaerobic digestion (TAD), which produced 95 ± 7 L methane kg-1 volatile solid with an overall energy efficiency of 12.9 ± 1.7%. A methanotroph, Methyloferula sp., was deployed for oxidation of mixed TAD biogas into methanol. The residual liquid stream from CRUDE process was used in a Microbial Fuel Cell (MFC) to produce electricity...
March 12, 2018: Bioresource Technology
Yingqian Peng, Edouard Baulier, Yifeng Ke, Alejandra Young, Novruz B Ahmedli, Steven D Schwartz, Debora B Farber
Extracellular vesicles (EVs) released by virtually every cell of all organisms are involved in processes of intercellular communication through the delivery of their functional mRNAs, proteins and bioactive lipids. We previously demonstrated that mouse embryonic stem cell-released EVs (mESEVs) are able to transfer their content to different target retinal cells, inducing morphological and biochemical changes in them. The main objective of this paper is to characterize EVs derived from human embryonic stem cells (hESEVs) and investigate the effects that they have on cultured retinal glial, progenitor Müller cells, which are known to give rise to retinal neurons under specific conditions...
2018: PloS One
Ayda Nemati Vesali Azar, Seda Keskin
Efficient separation of acetylene (C2 H2 ) from CO2 and CH4 is important to meet the requirement of high-purity acetylene in various industrial applications. Metal organic frameworks (MOFs) are great candidates for adsorption-based C2 H2 /CO2 and C2 H2 /CH4 separations due to their unique properties such as wide range of pore sizes and tunable chemistries. Experimental studies on the limited number of MOFs revealed that MOFs offer remarkable C2 H2 /CO2 and C2 H2 /CH4 selectivities based on single-component adsorption data...
2018: Frontiers in Chemistry
David S Ucker, Jerrold S Levine
Within an organism, environmental stresses can trigger cell death, particularly apoptotic cell death. Apoptotic cells, themselves, are potent regulators of their cellular environment, involved primarily in effecting homeostatic control. Tumors, especially, exist in a dynamic balance of cell proliferation and cell death. This special feature of the tumorous microenvironment-namely, the prominence and persistence of cell death-necessarily entails a magnification of the extrinsic, postmortem effects of dead cells...
2018: Frontiers in Immunology
Ellen A G Chernoff, Kazuna Sato, Hai V N Salfity, Deborah A Sarria, Teri Belecky-Adams
The differentiated state of spinal cord ependymal cells in regeneration-competent amphibians varies between a constitutively active state in what is essentially a developing organism, the tadpole of the frog Xenopus laevis , and a quiescent, activatable state in a slowly growing adult salamander Ambystoma mexicanum , the Axolotl. Ependymal cells are epithelial in intact spinal cord of all vertebrates. After transection, body region ependymal epithelium in both Xenopus and the Axolotl disorganizes for regenerative outgrowth (gap replacement)...
2018: Frontiers in Cellular Neuroscience
Raffaele Rani, Konrad Abramowicz, Daniel S Falster, Frank Sterck, Åke Brännström
Allocation of carbohydrates between competing organs is fundamental to plant development, growth and productivity. Carbohydrates are synthesized in mature leaves and distributed via the phloem vasculature to developing buds where they are consumed to produce new biomass. The distribution and mass-allocation processes within the plant remain poorly understood and may involve complex feedbacks between different plant functions, with implications for the emergent structure of the plant. Here, we investigate how the order in which dormant buds are flushed affects the development of tree size and reproductive output during the first 20 years of growth in full light and shaded canopy environments...
March 9, 2018: Tree Physiology
Roberta R Rodrigues, Jared Heath Delcamp, Hammad Cheema
The development of high voltage solar cells is an attractive way to use sunlight for solar-to-fuel devices, multijunction solar-to-electric systems, and to power limited area consumer electronics. By designing a low oxidation potential organic dye (RR9)/redox shuttle (Fe(bpy)33+/2+) pair for dye-sensitized solar cell (DSC) devices, the highest single device photovoltage (1.42 V) has been realized for a DSC not relying on doped TiO2. Additionally, Fe(bpy)33+/2+ offers a robust, readily tunable ligand platform for redox potential tuning...
March 12, 2018: Angewandte Chemie
Fernando Calahorro, Patricia G Izquierdo
Synapses are specialized contact sites that mediate information flow between neurons and their targets. Important physical interactions across the synapse are mediated by synaptic adhesion molecules. These adhesions regulate formation of synapses during development and play a role during mature synaptic function. Importantly, genes regulating synaptogenesis and axon regeneration are conserved across the animal phyla. Genetic screens in the nematode Caenorhabditis elegans have identified a number of molecules required for synapse patterning and assembly...
March 12, 2018: Invertebrate Neuroscience: IN
Christien P Laber, Jonathan E Hunter, Filipa Carvalho, James R Collins, Elias J Hunter, Brittany M Schieler, Emmanuel Boss, Kuldeep More, Miguel Frada, Kimberlee Thamatrakoln, Christopher M Brown, Liti Haramaty, Justin Ossolinski, Helen Fredricks, Jozef I Nissimov, Rebecca Vandzura, Uri Sheyn, Yoav Lehahn, Robert J Chant, Ana M Martins, Marco J L Coolen, Assaf Vardi, Giacomo R DiTullio, Benjamin A S Van Mooy, Kay D Bidle
Marine phytoplankton account for approximately half of global primary productivity1 , making their fate an important driver of the marine carbon cycle. Viruses are thought to recycle more than one-quarter of oceanic photosynthetically fixed organic carbon2 , which can stimulate nutrient regeneration, primary production and upper ocean respiration2 via lytic infection and the 'virus shunt'. Ultimately, this limits the trophic transfer of carbon and energy to both higher food webs and the deep ocean2 . Using imagery taken by the Moderate Resolution Imaging Spectroradiometer (MODIS) onboard the Aqua satellite, along with a suite of diagnostic lipid- and gene-based molecular biomarkers, in situ optical sensors and sediment traps, we show that Coccolithovirus infections of mesoscale (~100 km) Emiliania huxleyi blooms in the North Atlantic are coupled with particle aggregation, high zooplankton grazing and greater downward vertical fluxes of both particulate organic and particulate inorganic carbon from the upper mixed layer...
March 12, 2018: Nature Microbiology
Verónica Poza-Nogueiras, Emilio Rosales, Marta Pazos, M Ángeles Sanromán
Over the last decades, advanced oxidation processes have often been used alone, or combined with other techniques, for remediation of ground and surface water pollutants. The application of heterogeneous catalysis to electrochemical advanced oxidation processes is especially useful due to its efficiency and environmental safety. Among those processes, electro-Fenton stands out as the one in which heterogeneous catalysis has been broadly applied. Thus, this review has introduced an up-to-date collation of the current knowledge of the heterogeneous electro-Fenton process, highlighting recent advances in the use of different catalysts such as iron minerals (pyrite, magnetite or goethite), prepared catalysts by the load of metals in inorganic and organic materials, nanoparticles, and the inclusion of catalysts on the cathode...
March 2, 2018: Chemosphere
Carla C Baan
Developments in organ preservation techniques, novel immunosuppressants and improved diagnostics have made organ transplantation the success it is today. That does not mean that we are not still striving to perfect techniques, or that there are no more problems to solve. New strategies to address the donor organ shortage, prevent and manage antibody-mediated rejection, lower long-term allograft failure rates and reduce the toxicity of life-long immunosuppressive medication are urgently needed, and are being widely researched...
March 9, 2018: Transplantation
Celia M Rodriguez-Dominguez, Madeline R Carins Murphy, Christopher Lucani, Timothy J Brodribb
The capacity of plant species to resist xylem cavitation is an important determinant of resistance to drought, mortality thresholds, geographic distribution and productivity. Unravelling the role of xylem cavitation vulnerability in plant evolution and adaptation requires a clear understanding of how this key trait varies between the tissues of individuals and between individuals of species. Here, we examine questions of variation within individuals by measuring how cavitation moves between organs of individual plants...
March 12, 2018: New Phytologist
Karen E Hayes, Jamie A Barr, Mingyi Xie, Joan A Steitz, Ivan Martinez
Cellular quiescence (also known as G0 arrest) is characterized by reduced DNA replication, increased autophagy, and increased expression of cyclin-dependent kinase p27Kip1 . Quiescence is essential for wound healing, organ regeneration, and preventing neoplasia. Previous findings indicate that microRNAs (miRNAs) play an important role in regulating cellular quiescence. Our recent publication demonstrated the existence of an alternative miRNA biogenesis pathway in primary human foreskin fibroblast (HFF) cells during quiescence...
February 5, 2018: Bio-protocol
Andrey Elchaninov, Timur Fatkhudinov, Natalia Usman, Irina Arutyunyan, Andrey Makarov, Anastasia Lokhonina, Irina Eremina, Viktor Surovtsev, Dmitry Goldshtein, Galina Bolshakova, Valeria Glinkina, Gennady Sukhikh
AIM: To investigate the influence of the umbilical cord-derived multipotent stromal cells (MSCs) on recovery of the liver after the subtotal resection, that is, removal of 80% of the organ mass, a renowned model of the small-for-size liver remnant syndrome. METHODS: The MSCs were obtained from the intervascular tissue of umbilical cords, dissected from rat fetuses, by the explant culture technique. The vital labeling of MSCs with РКН26 was carried out on the 3rd passage...
February 27, 2018: World Journal of Hepatology
Mohsen Ghafari, John D Atkinson
A novel one-step hyper-cross-linking method, using 1,2-dichloroethane (DCE) and 1,6-dichlorohexane (DCH) cross-linkers, expands the micropore volume of commercial styrenic polymers. Performance of virgin and modified polymers was evaluated by measuring hexane, toluene, and methyl-ethyl-ketone (MEK) adsorption capacity, adsorption/desorption kinetics, and desorption efficiency. Hyper-cross-linked polymers have up to 128% higher adsorption capacity than virgin polymers at P/P0  = 0.05 due to micropore volume increases up to 330%...
February 27, 2018: Journal of Hazardous Materials
Tom G L Vandekerckhove, Kanae Kobayashi, Joery Janda, Sam Van Nevel, Siegfried E Vlaeminck
Autotrophic denitrification with sulfur is an underexplored alternative to heterotrophic denitrification to remove nitrate from wastewater poor in organics. The application on ion exchange regeneration water (19.4-32.1 mS cm-1 ) is novel. Three fixed bed reactors were tested at 15 °C for >4 months, inoculated with activated sludge from sewage treatment. All were fast in start-up (<10 days) with high performance (94 ± 2% removal efficiency). pH control with NaOH rendered higher nitrate removal rates than limestone addition to the bed (211 ± 13 vs...
February 13, 2018: Bioresource Technology
Quang Viet Ly, Jin Hur
This study assessed the relative contributions of different constitutes in dissolved organic matter (DOM) with two different sources (i.e., urban river and effluent) to membrane fouling on three types of ultrafiltration (UF) membranes via excitation emission matrix - parallel factor analysis (EEM-PARAFAC), size exclusion chromatography (SEC), and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). Two polyethersulfone membranes with different pore sizes and one regenerated cellulose membrane were used as representative hydrophobic (HPO) and hydrophilic (HPI) UF membranes, respectively...
March 1, 2018: Chemosphere
Ellen Heber-Katz, Phillip Messersmith
The capacity to regenerate entire body parts, tissues, and organs had generally been thought to be lost in evolution with very few exceptions (eg. the liver) surviving in mammals. The discovery of the MRL mouse and the elucidation of the underlying molecular pathway centering around hypoxia inducible factor, HIF-1α, has allowed a drug and materials approach to regeneration in mice and hopefully humans. The HIF-1α pathway is ancient and permitted the transition from unicellular to multicellular organisms. Furthermore, HIF-1α and its regulation by PHDs, important oxygen sensors in the cell, provides a perfect drug target...
March 7, 2018: Advanced Drug Delivery Reviews
Jonas Lorenz, Alica Kubesch, Sarah Al-Maawi, Frank Schwarz, Robert A Sader, Markus Schlee, Shahram Ghanaati
OBJECTIVES: The aim of the present study was the histological investigation of an allogeneic spongious bone block for horizontal and vertical ridge augmentation in humans. The amount of new bone, soft tissue, and residual bone substitute were histomorphometrically assessed after a mean healing period of 6 months. MATERIALS AND METHODS: Fourteen patients received augmentation with an allogeneic spongious bone block (Tutobone® , Tutogen Medical, Neunkirchen, Germany)...
March 9, 2018: Clinical Oral Investigations
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"