scholarly journals Assembly of polythiophenes on responsive polymer microgels for the highly selective detection of ammonia gas

2016 ◽  
Vol 7 (18) ◽  
pp. 3179-3188 ◽  
Author(s):  
Aiping Chang ◽  
Yahui Peng ◽  
Zezhou Li ◽  
Xiang Yu ◽  
Kunlun Hong ◽  
...  
Keyword(s):  
Signal Transduction ◽  
Selective Detection ◽  
Ammonia Gas ◽  
Responsive Polymer ◽  
Novel Material

A novel material that allows highly selective ammonia-to-conductance signal transduction is prepared by the assembly of polythiophenes on responsive polymer microgels.

scholarly journals Chemo-Electrical Signal Transduction by Using Stimuli-Responsive Polymer Gate-Modified Field Effect Transistor

Chemosensors ◽  
2014 ◽  
Vol 2 (2) ◽  
pp. 97-107 ◽  
Author(s):  
Akira Matsumoto ◽  
Yusuke Tsurui ◽  
Hiroko Matsumoto ◽  
Yasuhiro Maeda ◽  
Toru Hoshi ◽  
...  
Keyword(s):  
Signal Transduction ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Electrical Signal ◽  
Stimuli Responsive ◽  
Responsive Polymer ◽  
Effect Transistor ◽  
Stimuli Responsive Polymer

PSE-Coated Interdigital Resonator for Selective Detection of Ammonia Gas Sensor

2019 ◽  
Vol 19 (23) ◽  
pp. 11228-11235 ◽  
Author(s):  
Warunee Krudpun ◽  
Nonchanutt Chudpooti ◽  
Panida Lorwongtragool ◽  
Somporn Seewattanapon ◽  
Prayoot Akkaraekthalin
Keyword(s):  
Gas Sensor ◽  
Selective Detection ◽  
Ammonia Gas

Temperature responsive polymer brushes grafted from graphene oxide: an efficient fluorescent sensing platform for 2,4,6-trinitrophenol

2016 ◽  
Vol 4 (29) ◽  
pp. 7083-7092 ◽  
Author(s):  
Yajiao Song ◽  
Jianhua Lü ◽  
Bingxin Liu ◽  
Changli Lü
Keyword(s):  
Graphene Oxide ◽  
Polymer Brushes ◽  
Raft Polymerization ◽  
Selective Detection ◽  
Fluorescent Sensing ◽  
Temperature Responsive ◽  
Sensing Platform ◽  
Responsive Polymer ◽  
Responsive Behavior ◽  
Copolymer Brushes

The block copolymer brushes of PNIPAM-b-P(MQ-co-GMA) were grafted from GO by RAFT polymerization. The resulting luminescent hybrid containing Alq3exhibited a robust temperature-responsive behavior and could be used as a nano-platform for the sensitive and selective detection of TNP.

A Novel Material Fluorescence Probe Based on Covalently Functionalized Graphene Oxide by Aminocoumarin for Detection of CN−

NANO ◽  
2020 ◽  
Vol 15 (02) ◽  
pp. 2050022
Author(s):  
Wenhui Ma ◽  
Zhaochuan Yu ◽  
Zhongcai Li ◽  
Jing Wen ◽  
Baoru Zhao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Fluorescence Spectra ◽  
High Selectivity ◽  
Fluorescence Probe ◽  
Deionized Water ◽  
Selective Detection ◽  
Functionalized Graphene ◽  
Functionalized Graphene Oxide ◽  
The World ◽  
Novel Material

Owing to the hazardness, the sensitive and selective detection of cyanide (CN−) in water or water-containing systems has still been a puzzle plaguing scientists all around the world. In this paper, a novel fluorescence probe based on covalently functionalized graphene oxide (GO) by aminocoumarin for highly selective detection of CN− in deionized water was prepared under the action of EDC/NHS. This probe bears aminocoumarin group as the recognition site and fluorophore, and its fluorescence quantum yield is increased by 0.07. Simultaneously, by loading on GO, the dispersibility, selectivity and reversibility were soundly improved, which facilitated the detection process. The fluorescence spectra showed that the probe has high selectivity and sensitivity for cyanide, and has potential application in real water.

scholarly journals Indium Nitrite (InN)-Based Ultrasensitive and Selective Ammonia Sensor Using an External Silicone Oil Filter for Medical Application

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3887 ◽  
Author(s):  
Sujeet Rai ◽  
Kun-Wei Kao ◽  
Shanjgr Gwo ◽  
Ashish Agarwal ◽  
Wei Lin ◽  
...  
Keyword(s):  
Silicone Oil ◽  
Operating Temperature ◽  
Medical Application ◽  
Noninvasive Diagnosis ◽  
Selective Detection ◽  
Detection Time ◽  
Ammonia Sensor ◽  
Ammonia Gas ◽  
Lower Detection Limit ◽  
Lower Detection

Ammonia is an essential biomarker for noninvasive diagnosis of liver malfunction. Therefore, selective detection of ammonia is essential for medical application. Here, we demonstrate a portable device to selectively detect sub-ppm ammonia gas. The presented gas sensor is composed of a Pt coating on top of an ultrathin Indium nitrite (InN) epilayer with a lower detection limit of 0.2 ppm, at operating temperature of 200 °C, and detection time of 1 min. The sensor connected with the external filter of nonpolar 500 CS silicone oil to diagnose liver malfunction. The absorption of 0.7 ppm acetone and 0.4 ppm ammonia gas in 10 cc silicone oil is 80% (0.56 ppm) and 21.11% (0.084 ppm), respectively, with a flow rate of 10 cc/min at 25 °C. The absorption of acetone gas is 6.66-fold higher as compared to ammonia gas. The percentage variation in response for 0.7 ppm ammonia and 0.7 ppm acetone with and without silicone oil on InN sensor is 17.5% and 4%, and 22.5%, and 14% respectively. Furthermore, the percentage variation in response for 0.7 ppm ammonia gas with silicone oil on InN sensor is 4.3-fold higher than that of 0.7 ppm acetone. The results show that the InN sensor is suitable for diagnosis of liver malfunction.

Stable Cobalt Porphyirn Ometed Type Small Molecule Sensor for the Sensitive and Selective Detection of Ammonia Gas at Room Temperature

2021 ◽  
pp. 2100147
Author(s):  
Muhammad Naeem Shah ◽  
Srinivasa Rao Pathipati ◽  
Shahid Mehmood ◽  
Faheem Ullah ◽  
Muhammad Sohail ◽  
...  
Keyword(s):  
Small Molecule ◽  
Room Temperature ◽  
Selective Detection ◽  
Ammonia Gas

Ultrastructural aspects of olfactory signal transduction and its development

1994 ◽  
Vol 52 ◽  
pp. 142-143
Author(s):  
Bert Ph. M. Menco
Keyword(s):  
Signal Transduction ◽  
Olfactory Receptor ◽  
Receptor Cell ◽  
Freeze Substitution ◽  
Luminal Surface ◽  
Tissue Sections ◽  
Olfactory Receptor Cells ◽  
Receptor Cells ◽  
Olfactory Signal ◽  
Odor Molecule

Vertebrate olfactory receptor cells are specialized neurons that have numerous long tapering cilia. The distal parts of these cilia line the interface between the external odorous environment and the luminal surface of the olfactory epithelium. The length and number of these cilia results in a large surface area that presumably increases the chance that an odor molecule will meet a receptor cell. Advanced methods of cryoprepration and immuno-gold labeling were particularly useful to preserve the delicate ultrastructural and immunocytochemical features of olfactory cilia required for localization of molecules involved in olfactory signal-transduction. We subjected olfactory tissues to freeze-substitution in acetone (unfixed tissues) or methanol (fixed tissues) followed by low temperature embedding in Lowicryl K11M for that purpose. Tissue sections were immunoreacted with several antibodies against proteins that are presumably important in olfactory signal-transduction.

Signal-regulated oxidation of proteins via MICAL

2020 ◽  
Vol 48 (2) ◽  
pp. 613-620
Author(s):  
Clara Ortegón Salas ◽  
Katharina Schneider ◽  
Christopher Horst Lillig ◽  
Manuela Gellert
Keyword(s):  
Signal Transduction ◽  
Hydrogen Peroxide ◽  
Cell Death ◽  
Redox Regulation ◽  
Signal Transduction Pathways ◽  
Cellular Functions ◽  
Intracellular Signals ◽  
Amino Acid Side Chains ◽  
Specific Receptors ◽  
Sulfur Containing

Processing of and responding to various signals is an essential cellular function that influences survival, homeostasis, development, and cell death. Extra- or intracellular signals are perceived via specific receptors and transduced in a particular signalling pathway that results in a precise response. Reversible post-translational redox modifications of cysteinyl and methionyl residues have been characterised in countless signal transduction pathways. Due to the low reactivity of most sulfur-containing amino acid side chains with hydrogen peroxide, for instance, and also to ensure specificity, redox signalling requires catalysis, just like phosphorylation signalling requires kinases and phosphatases. While reducing enzymes of both cysteinyl- and methionyl-derivates have been characterised in great detail before, the discovery and characterisation of MICAL proteins evinced the first examples of specific oxidases in signal transduction. This article provides an overview of the functions of MICAL proteins in the redox regulation of cellular functions.

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