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https://www.readbyqxmd.com/read/28231688/study-on-removal-difference-in-indoor-particulate-matter-and-volatile-organic-compounds-through-application-of-the-plants
#1
Seung-Han Hong, Jiyeon Hong, Jihyeon Yu, Young-Wook Lim
This study was conducted to evaluate the ability of plants to purify indoor air by observing the effective reduction rate among pollutant types of particulate matter and volatile organic compounds. Particulate matter and four types of volatile organic compounds were measured in a new building that is less than 3 years old and under three different conditions: before applying the plant, after applying the plant, and a room without a plant. The removal rate of each pollutant type due to the plant was also compared and analyzed...
February 22, 2017: Environmental Health and Toxicology
https://www.readbyqxmd.com/read/28230977/extracellular-self-assembly-of-functional-and-tunable-protein-conjugates-from-bacillus-subtilis
#2
Charlie Gilbert, Mark Howarth, Colin R Harwood, Tom Ellis
The ability to stably and specifically conjugate recombinant proteins to one another is a powerful approach for engineering multifunctional enzymes, protein therapeutics and novel biological materials. While many of these applications have been illustrated through in vitro and in vivo intracellular protein conjugation methods, extracellular self-assembly of protein conjugates offers unique advantages: simplifying purification, reducing toxicity and burden, and enabling tunability. Exploiting the recently described SpyTag-SpyCatcher system, we describe here how enzymes and structural proteins can be genetically-encoded to covalently conjugate in culture media following programmable secretion from Bacillus subtilis...
February 23, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28230878/multifunctional-hybrid-porous-filters-with-hierarchical-structures-for-simultaneous-removal-of-indoor-vocs-dusts-and-microorganisms
#3
Yang Zhao, Ze-Xian Low, Shasha Feng, Zhaoxiang Zhong, Yong Wang, Zhong Yao
Air purification often requires multiple layers of filters with different functions to remove various air pollutants, which lead to high pressure drop, high air flow path and frequent filter replacement. In this work, a novel multifunctional Ag@MWCNTs/Al2O3 hybrid filter with a depth-type hierarchical structure for simultaneous removal of fine particles, microorganisms and VOCs was designed and fabricated. The novel hybrid air filter showed leading air purification performances to date, achieving 82.24% degradation of formaldehyde at room temperature, 99...
February 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28230851/using-hiclip-to-identify-rna-duplexes-that-interact-with-a-specific-rna-binding-protein
#4
Yoichiro Sugimoto, Anob M Chakrabarti, Nicholas M Luscombe, Jernej Ule
The structure of RNA molecules has a critical role in regulating gene expression, largely through influencing their interactions with RNA-binding proteins (RBPs). RNA hybrid and individual-nucleotide resolution UV cross-linking and immunoprecipitation (hiCLIP) is a transcriptome-wide method of monitoring these interactions by identifying RNA duplexes bound by a specific RBP. The hiCLIP protocol consists of the following steps: in vivo cross-linking of RBPs to their bound RNAs; partial RNA digestion and purification of RNA duplexes interacting with the specific RBP using immunoprecipitation; ligation of the two arms of RNA duplexes via a linker; reverse transcription; cDNA library amplification; and finally high-throughput DNA sequencing...
March 2017: Nature Protocols
https://www.readbyqxmd.com/read/28230850/metal-and-additive-free-photoinduced-borylation-of-haloarenes
#5
Adelphe M Mfuh, Brett D Schneider, Westley Cruces, Oleg V Larionov
Boronic acids and esters have critical roles in the areas of synthetic organic chemistry, molecular sensors, materials science, drug discovery, and catalysis. Many of the current applications of boronic acids and esters require materials with very low levels of transition metal contamination. Most of the current methods for the synthesis of boronic acids, however, require transition metal catalysts and ligands that must be removed via additional purification procedures. This protocol describes a simple, metal- and additive-free method of conversion of haloarenes directly to boronic acids and esters...
March 2017: Nature Protocols
https://www.readbyqxmd.com/read/28230785/the-application-of-a-modified-d-roms-test-for-measurement-of-oxidative-stress-and-oxidized-high-density-lipoprotein
#6
Fumiaki Ito, Tomoyuki Ito, Chinatsu Suzuki, Tomoyo Yahata, Kazuyuki Ikeda, Kenji Hamaoka
Reactive oxygen species (ROS) are involved in the initiation and progression of atherosclerosis. ROS-derived hydroperoxides, as an indicator of ROS production, have been measured by using the diacron reactive oxygen metabolites (d-ROMs) test, which requires iron-containing transferrin in the reaction mixture. In this study we developed a modified d-ROMs test, termed the Fe-ROMs test, where iron ions were exogenously added to the reaction mixture. This modification is expected to exclude the assay variation that comes from different blood iron levels in individuals...
February 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28230323/simultaneous-determination-of-seven-nitrogen-containing-phenyl-ethers-in-cosmetics-by-gas-chromatography-with-mass-spectrometry-and-dispersive-solid-phase-extraction
#7
Jiale Huang, Langjun Zhou, Zhiqing Xun, Qiang Wang, Senyu Lin, Xindong Guo, Yongtong Cai
An analytical method was established for the simultaneous determination of seven nitrogen-containing phenyl ethers (2-anisidine, 3-anisidine, 4-anisidine, 2-nitroanisole, 3-nitroanisole, 4-nitroanisole and 3,3'-dimethoxybenzidine) in cosmetics by gas chromatography with mass spectrometry in this work. The samples were extracted with ethyl acetate and purified with primary secondary amine during the dispersed solid phase extraction. The analytes were separated by a DB-17MS column and detected in the electron ionization mode of mass spectrometry in the selected ions monitoring mode...
February 23, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28230046/gel-phase-formation-in-dilute-triblock-copolyelectrolyte-complexes
#8
Samanvaya Srivastava, Marat Andreev, Adam E Levi, David J Goldfeld, Jun Mao, William T Heller, Vivek M Prabhu, Juan J de Pablo, Matthew V Tirrell
Assembly of oppositely charged triblock copolyelectrolytes into phase-separated gels at low polymer concentrations (<1% by mass) has been observed in scattering experiments and molecular dynamics simulations. Here we show that in contrast to uncharged, amphiphilic block copolymers that form discrete micelles at low concentrations and enter a phase of strongly interacting micelles in a gradual manner with increasing concentration, the formation of a dilute phase of individual micelles is prevented in polyelectrolyte complexation-driven assembly of triblock copolyelectrolytes...
February 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28229907/expression-and-functional-evaluation-of-biopharmaceuticals-made-in-plant-chloroplasts
#9
REVIEW
Bei Zhang, Balamurugan Shanmugaraj, Henry Daniell
After approval of the first plant-made biopharmaceutical by FDA for human use, many protein drugs are now in clinical development. Within the last decade, significant advances have been made in expression of heterologous complex/large proteins in chloroplasts of edible plants using codon optimized human or viral genes. Furthermore, advances in quantification enable determination of in-planta drug dosage. Oral delivery of plastid-made biopharmaceuticals (PMB) is affordable because it eliminates prohibitively expensive fermentation, purification processes addressing major challenges of short shelf-life after cold storage...
February 21, 2017: Current Opinion in Chemical Biology
https://www.readbyqxmd.com/read/28229589/production-of-cinnamyl-alcohol-glucoside-from-glucose-in-escherichia-coli
#10
Wei Zhou, Huiping Bi, Yibin Zhuang, Qinglin He, Hua Yin, Tao Liu, Yanhe Ma
Rosin, a cinnamyl alcohol glucoside, is one of the important ingredients in Rhodiola rosea, which is a valuable medicinal herb used for centuries. Rosin displayed multiple biological activities. The traditional method for producing rosin and derivatives is direct extraction from R. rosea, which suffers from limited availability of natural resources and complicated purification procedure. In this work, we achieved de novo biosynthesis of rosin in Escherichia coli. Firstly, a biosynthetic pathway of aglycon cinnamyl alcohol from phenylalanine was constructed...
February 23, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28229436/purification-and-characterization-of-a-novel-ubiquitin-like-antitumour-protein-with-hemagglutinating-and-deoxyribonuclease-activities-from-the-edible-mushroom-ramaria-botrytis
#11
Rong Zhou, Ya-Jie Han, Min-Hui Zhang, Ke-Ren Zhang, Tzi Bun Ng, Fang Liu
A novel ubiquitin-like antitumour protein (RBUP) was isolated from fruiting bodies of the edible mushroom Ramaria botrytis. The protein was isolated with a purification protocol involving ion exchange chromatography on DEAE-Sepharose fast flow and gel filtration on Sephadex G-75. SDS-PAGE, Native-PAGE and ultracentrifugation analysis disclosed that RBUP was a monomeric protein with a molecular weight of 18.5 kDa. ESI-MS/MS demonstrated that it shared 69% amino acid sequence similarity with Coprinellus congregates ubiquitin (gi|136667)...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28229416/human-induced-pluripotent-stem-cell-derived-mesenchymal-stem-cells-as-an-individual-specific-and-renewable-source-of-adult-stem-cells
#12
Glen Lester Sequiera, Sekaran Saravanan, Sanjiv Dhingra
This chapter deals with the employment of human-induced pluripotent stem cells (hiPSCs) as a candidate to differentiate into mesenchymal stem cells (MSCs). This would enable to help establish a regular source of human MSCs with the aim of avoiding the problems associated with procuring the MSCs either from different healthy individuals or patients, limited extraction potentials, batch-to-batch variations or from diverse sources such as bone marrow or adipose tissue. The procedures described herein allow for a guided and ensured approach for the regular maintenance of hiPSCs and their subsequent differentiation into MSCs using the prescribed medium...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28229045/occurrence-of-giardia-cryptosporidium-and-entamoeba-in-wild-rhesus%C3%A2-macaques-macaca-mulatta-living-in-urban-and-semi-rural-north-west-india
#13
John J Debenham, Kristoffer Tysnes, Sandhya Khunger, Lucy J Robertson
Giardia duodenalis, Cryptosporidium spp., and Entamoeba spp. are intestinal protozoa capable of infecting a range of host species, and are important causes of human morbidity and mortality. Understanding their epidemiology is important, both for public health and for the health of the animals they infect. This study investigated the occurrence of these protozoans in rhesus macaques (Macaca mulatta) in India, with the aim of providing preliminary information on the potential for transmission of these pathogens between macaques and humans...
April 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/28225865/continuous-blood-purification-treatment-for-endotoxin-induced-acute-respiratory-distress-syndrome
#14
Y Jiang, R Lin, Y Xu, S Zhang, K Cui, M Zhu, A Li, C Chen, J Yang, W Yang
This study aimed to explore the effects of continuous blood purification (CBP) treatment in pigs affected with acute respiratory distress syndrome (ARDS). A total of 12 healthy male pigs, weighing 12±1.8 kg, were randomly and equally assigned to the control and experimental groups. The ARDS pig model was prepared by intravenous injections of endotoxin (20 µg/kg). The control group was given conventional supportive therapy, while the experimental group was given continuous veno-venous hemofiltration therapy...
February 16, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28225803/bacterial-expression-correct-membrane-targeting-and-functional-folding-of-the-hiv-1-membrane-protein-vpu-using-a-periplasmic-signal-peptide
#15
Arpan Deb, William A Johnson, Alexander P Kline, Boston J Scott, Lydia R Meador, Dustin Srinivas, Jose M Martin-Garcia, Katerina Dörner, Chad R Borges, Rajeev Misra, Brenda G Hogue, Petra Fromme, Tsafrir S Mor
Viral protein U (Vpu) is a type-III integral membrane protein encoded by Human Immunodeficiency Virus-1 (HIV- 1). It is expressed in infected host cells and plays several roles in viral progeny escape from infected cells, including down-regulation of CD4 receptors. But key structure/function questions remain regarding the mechanisms by which the Vpu protein contributes to HIV-1 pathogenesis. Here we describe expression of Vpu in bacteria, its purification and characterization. We report the successful expression of PelB-Vpu in Escherichia coli using the leader peptide pectate lyase B (PelB) from Erwinia carotovora...
2017: PloS One
https://www.readbyqxmd.com/read/28225254/insights-into-free-volume-variations-across-ion-exchange-membranes-upon-mixed-solvents-uptake-by-small-and-ultra-small-angle-neutron-scattering
#16
Francois-Marie Allioux, Christopher J Garvey, Christine Rehm, Blaise L Tardy, Raymond Riley Dagastine, Peter D Hodgson, Lingxue Kong, Ludovic Francis Dumée
Ion-exchange membranes are composite separation materials increasingly used in a variety of electro-membranes and electro-chemical processes. Although promising for solvent reclamation, to date, their main applications are limited to aqueous environments due to physico-chemical and microstructural changes of the materials upon exposure to non-aqueous and mixed solvents solutions, affecting long term stability and separation performance. In the present work, the structural changes of commercial and novel hybrid ion-exchange membranes in mixed methanol/water and ethanol/water solutions are assessed for the first time using ultra-and small-angle neutron scattering techniques...
February 22, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28225217/proteomic-analysis-of-the-cullin4b-interactome-using-proximity-dependent-biotinylation-in-living-cells
#17
Hailong Zhang, Shupeng Li, Pingting Liu, Frankie H F Lee, Albert H C Wong, Fang Liu
Cullin 4B (CUL4B) mutations have been implicated in mental retardation and dopamine-related behaviors due to disruptions in their interaction with Cullin-RING E3 ligases (CRLs). Thus, further identification of CUL4B substrates can increase the knowledge of protein homeostasis and illuminate the role of CUL4B in neuropsychiatric disease. However, the transient nature of the coupling between CUL4B and its substrates is difficult to detect in vivo using current approaches, thus hampers efforts to investigate functions of CRLs within unperturbed living systems...
February 22, 2017: Proteomics
https://www.readbyqxmd.com/read/28225144/molecular-and-genetic-basis-for-early-stage-structural-diversifications-in-hapalindole-type-alkaloid-biogenesis
#18
Qin Zhu, Xinyu Liu
Heterologous expressions and purifications of all WelU proteins from the welwitindolinone pathways in Hapalosiphon welwitschii UTEX B1830 and IC-52-3 led to the discovery that WelU1 and WelU3 selectively assemble 12-epi-fischerindole U (2) and 12-epi-hapalindole C (1), respectively, from 3-geranyl 3-isocyanovinyl indolenine (4) via an enzymatic cascade featuring the Cope rearrangement, stereoselective aza-Prins cyclization and regioselective carbocation deposition. In combination with the in vitro characterization of WelU1/WelU3-homolog AmbU4 for the biogenesis of 12-epi-hapalindole U, this study provide a unified view on the origin of the early stage structural diversifications in hapalindole-type alkaloid biosynthesis, post common intermediate 4...
February 22, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28225020/improved-antitumor-activity-of-trail-fusion-protein-via-formation-of-self-assembling-nanoparticle
#19
Kaizong Huang, Ningjun Duan, Chunmei Zhang, Ran Mo, Zichun Hua
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) has been known as a promising agent for cancer therapy due to its specific apoptosis-inducing effect on tumor cells rather than most normal cells. However, systemically delivered TRAIL suffers from a rapid clearance from the body with an extremely short half-life. Thermally responsive elastin-like polypeptides (ELPs) are a promising class of temperature sensitive biopolymers based on the structural motif found in mammalian tropoelastin and retain the advantages of polymeric drug delivery systems...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28224978/methylated-antibody-affinity-purification-to-improve-proteomic-identification-of-plant-rna-polymerase-pol-v-complex-and-the-interacting-proteins
#20
Guochen Qin, Jun Ma, Xiaomei Chen, Zhaoqing Chu, Yi-Min She
Affinity purification followed by enzymatic digestion and mass spectrometry has been widely utilized for the sensitive detection of interacting proteins and protein complexes in various organisms. In plants, the method is technically challenging due to the low abundance proteins, non-specific binding and difficulties of eluting interacting proteins from antibody beads. In this report, we describe a strategy to modify antibodies by reductive methylation of lysines without affecting their binding properties, followed by on-bead digestion of bound proteins with endoproteinase Lys-C...
February 22, 2017: Scientific Reports
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