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The role of hydrogen peroxide and singlet oxygen in the photodegradation of melanin

Photochem. Photobiol. Sci., 2020, Advance Article
DOI: 10.1039/C9PP00481E, Paper
Andrzej Żądło, Shosuke Ito, Michał Sarna, Kazumasa Wakamatsu, Krystian Mokrzyński, Tadeusz Sarna
Hydrogen peroxide, formed during the aerobic photolysis of melanin, is not responsible for the accompanying oxidative modifications of this pigment.
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The red chlorophyll catabolite (RCC) is an inefficient sensitizer of singlet oxygen – photochemical studies of the methyl ester of RCC

Photochem. Photobiol. Sci., 2020, Advance Article
DOI: 10.1039/D0PP00071J, Paper
Steffen Jockusch, Bernhard Kräutler
Red chlorophyll catabolite, generated as an intermediate during chlorophyll breakdown in higher plants, is considered a phototoxic ‘pro-death molecule’. However, its singlet oxygen and fluorescence quantum yields are remarkably low.
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Effect of ultraviolet radiation on vertebrate animals: update from ethological and medical perspectives

Photochem. Photobiol. Sci., 2020, Advance Article
DOI: 10.1039/C9PP00488B, Perspective
Claire Vergneau-Grosset, Franck Péron
Many animals under human care are kept indoors to prevent infectious diseases, to facilitate environment control, or due to the lifestyle of their owners. This article will review published information about ultraviolet effects in vertebrate animals.
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An antipyrine based fluorescent probe for distinct detection of Al3+ and Zn2+ and its AIEE behaviour

Photochem. Photobiol. Sci., 2020, Advance Article
DOI: 10.1039/C9PP00472F, Paper
Samir Maity, Milan Shyamal, Rakesh Maity, Naren Mudi, Paresh Hazra, Prabhat Kr. Giri, Shashanka Shekhar Samanta, Santanu Pyne, Ajay Misra
A simple antipyrine based fluorescent probe, 4-(2-hydroxy-3-methoxy-benzylidene)-amino-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-one (OVAP), has been successfully synthesized using a one-step condensation method.
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Ultraviolet-C and other methods of decontamination of filtering facepiece N-95 respirators during the COVID-19 pandemic

Photochem. Photobiol. Sci., 2020, Accepted Manuscript
DOI: 10.1039/D0PP00131G, Perspective
Angeli Eloise Torres, Alexis B. Lyons, Shanthi Narla, Indermeet Kohli, Angela Parks-Miller, David Ozog, Iltefat H. Hamzavi, Henry W. Lim
During global heath emergencies such as the current COVID-19 pandemic, the decontamination of single-use personal protective equipment (PPE) becomes a necessary means to keep up with the growing demand from...
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The pigment binding behaviour of water-soluble chlorophyll protein (WSCP)

Photochem. Photobiol. Sci., 2020, Advance Article
DOI: 10.1039/D0PP00043D, Paper
Philipp Girr, Jessica Kilper, Anne-Christin Pohland, Harald Paulsen
Water-soluble chlorophyll proteins (WSCPs) bind chlorophyll with a high affinity in a fast reaction, and other tetrapyrroles with a lower affinity and altered reaction kinetics.
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Photocyclization of diarylethylenes with a boronate moiety: a useful synthetic tool to soluble PAH building blocks

Photochem. Photobiol. Sci., 2020, Advance Article
DOI: 10.1039/C9PP00497A, Paper
Mikhail Feofanov, Arber Uka, Vladimir Akhmetov, Konstantin Amsharov
We describe the oxidative photocyclization of borylated diarylethylenes as a convenient method for the preparation of borylated PAHs as highly soluble precursors for further transformations.
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The origin of the longer wavelength emission in 2-(4-fluorophenylamino)-5-(2,4-dihydroxybenzeno)-1,3,4-thiadiazole and its analogue 2-phenylamino-5-(2-hydroxybenzono)-1,3,4-thiadiazole

Photochem. Photobiol. Sci., 2020, Advance Article
DOI: 10.1039/C9PP00490D, Paper
Ila, Reshmi Dani, Surya Pratap Verma, G. Krishnamoorthy
The longer wavelength emissions of 2-(4-fluorophenylamino)-5-(2,4-dihydroxybenzeno)-1,3,4-thiadiazole (FABT) and 2-phenylamino-5-(2-hydroxybenzono)-1,3,4-thiadiazole (PHBT) are due to ESIPT.
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Facile synthesis and exploration of excited state assisted two-photon absorption properties of D–A–D type thiophene–pyridine derivatives

Photochem. Photobiol. Sci., 2020, Advance Article
DOI: 10.1039/D0PP00047G, Paper
Viprabha Kakekochi, Sathish Chatnahalli Gangadharappa, Nikhil P. P., Chandrasekharan Keloth, Ezequiel Wolcan, Udaya Kumar D
Diagrammatic representation of excited state assisted two-photon absorption (2PA) behavior of a donor–acceptor type conjugated polymer (P2TPy) exhibiting an extremely low optical limiting threshold.
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Photochromic Meta-diamides for Optical Modulation of Ligand Activity and Neuron Function

Photochem. Photobiol. Sci., 2020, Accepted Manuscript
DOI: 10.1039/D0PP00045K, Paper
cuncun zhou, Liping Ren, Yunfan Ji, Xusheng Shao
Photopharmacology offers facile solutions to spatiotemporal control over ligand activity and receptor function. Meta-diamide insecticide acts on insect GABA receptors (GABARs) as an antagonist that causes firing of a neuron....
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Food-based strategies for prevention of vitamin D deficiency as informed by vitamin D dietary guidelines, and consideration of minimal-risk UVB radiation exposure in future guidelines.

Photochem. Photobiol. Sci., 2020, Accepted Manuscript
DOI: 10.1039/C9PP00462A, Paper
Kevin D Cashman
There is widespread acknowledgement of the presence of vitamin D deficiency in the community and the pressing need to address this. From a public health perspective, emphasis has been placed...
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Environmental effects of stratospheric ozone depletion, UV radiation and interactions with climate change: UNEP Environmental Effects Assessment Panel, update 2019

Photochem. Photobiol. Sci., 2020, Advance Article
DOI: 10.1039/D0PP90011G, Perspective
G. H. Bernhard, R. E. Neale, P. W. Barnes, P. J. Neale, R. G. Zepp, S. R. Wilson, A. L. Andrady, A. F. Bais, R. L. McKenzie, P. J. Aucamp, P. J. Young, J. B. Liley, R. M. Lucas, S. Yazar, L. E. Rhodes, S. N. Byrne, L. M. Hollestein, C. M. Olsen, A. R. Young, T. M. Robson, J. F. Bornman, M. A. K. Jansen, S. A. Robinson, C. L. Ballaré, C. E. Williamson, K. C. Rose, A. T. Banaszak, D.-P. Häder, S. Hylander, S.-Å. Wängberg, A. T. Austin, W.-C. Hou, N. D. Paul, S. Madronich, B. Sulzberger, K. R. Solomon, H. Li, T. Schikowski, J. Longstreth, K. K. Pandey, A. M. Heikkilä, C. C. White
This assessment provides an update of the interactive effects of solar ultraviolet (UV) radiation, stratospheric ozone, and climate change on human health, terrestrial and aquatic ecosystems, biochemical cycles, air quality, and material damage.
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Palladium porphyrin complexes for photodynamic cancer therapy: effect of porphyrin units and metal

Photochem. Photobiol. Sci., 2020, Advance Article
DOI: 10.1039/C9PP00363K, Paper
Jingran Deng, Haolan Li, Mengqian Yang, Fengshou Wu
The ROS generation ability and photocytotoxicity of the synthesized porphyrin compounds were enhanced with the number of porphyrin units in the photosensitizers.
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Exploration of fluorescence behavior of an imidazolium-based chemosensor in solution and in the solid state and its turn-on response to Al3+ in pure aqueous medium

Photochem. Photobiol. Sci., 2020, Advance Article
DOI: 10.1039/C9PP00477G, Paper
Vaishali Saini, Rangan Krishnan, Bharti Khungar
An imidazolium-based quinoline framework is constructed, and its fluorescence behaviour studies with fluorescence turn-on chemosensory response to the selective detection of Al3+ in aqueous medium are discussed in detail.
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In vitro photodynamic treatment of cancer cells induced by aza-BODIPYs

Photochem. Photobiol. Sci., 2020, Advance Article
DOI: 10.1039/D0PP00026D, Paper
Miryam Chiara Malacarne, Stefano Banfi, Enrico Caruso
Two new aza-BODIPY photosensitizers featuring an iodine atom on each pyrrolic unit of their structure, were synthesized in fairly good yields and tested in vitro on two human cancer cell lines to assess their photodynamic efficacy.
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Turn-on mode fluorescent diarylethenes: Effect of electron-donating and electron-withdrawing substituents on photoswitching performance

Photochem. Photobiol. Sci., 2020, Accepted Manuscript
DOI: 10.1039/D0PP00064G, Paper
Ryota Iwai, Masakazu Morimoto, Masahiro Irie
Diarylethene derivatives having benzothiophene S,S-dioxide groups undergo turn-on mode fluorescence photoswitching. For the practical application to super-resolution fluorescence microscopy, the photoswitchable fluorescent molecules are desired to be resistant against photodegradation....
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Can Jameis Winston be a productive QB despite the multitude of INTs?

Production vs. volatility: Can a quarterback outproduce a bad turnover-worthy throw rate?




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Update on the Treatment of Tuberculosis and Latent Tuberculosis Infection

Interview with Henry M. Blumberg, MD, author of Update on the Treatment of Tuberculosis and Latent Tuberculosis Infection, published in the June 8 issue of JAMA, the Journal of the American Medical Association. Summary Points: 1. Tuberculosis is a public health problem. The responsibility for prescribing an appropriate regimen and assuring that treatment is completed is assigned to the public health program or the treating physician, not the patient. 2. Directly observed therapy is recommended for all patients being treated for active TB, this will necessitate the need for greater collaboration between the treating physician and the public health department. 3. Initial therapy for newly diagnosed patients with tuberculosis consists of a 4-drug regimen including isoniazid, rifampin, pyrazinamide and ethambutol. 4. Testing for latent TB infection should be targeted at those who are at increased risk of progression to active TB. 5. Despite its limitations, the tuberculin skin test remains the most commonly used test for the diagnosis of latent TB infection; newer diagnostic tests for latent TB infection are on the horizon. 6. Active tuberculosis should be excluded before beginning treatment for latent tuberculosis infection. 7. Nine months of isoniazid is the preferred therapy for the treatment of latent TB infection.




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Symptom Experience After Discontinuing Use of Estrogen Plus Progestin

Interview with Judith K. Ockene, PhD, MEd, author of Symptom Experience After Discontinuing Use of Estrogen Plus Progestin, published in the July 13 issue of JAMA, the Journal of the American Medical Association. Summary Points: 1. Of the women who stopped E plus P, 21.2% had menopausal symptoms (hot flashes or night sweats) after stopping study medication compared to 4.8% of women who were on placebo. 2. Of the women who had menopausal symptoms when they started the study (about 12%) and were in the active hormone group, over 50% had a recurrence of symptoms after they stopped MHT compared to 21% of placebo users who had a recurrence of symptoms. 3. Women in the E plus P group reported higher rates of pain or stiffness (36.8%) after they stopped study medication compared to women who had been on placebo (22.2%). 4. Women who had symptoms after they stopped study medication reported using a wide range of strategies to manage symptoms and a large proportion found the strategies to be helpful.




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Clinical Decision Support and Appropriateness of Antimicrobial Prescribing: A Randomized Trial

Interview with Matthew H. Samore, MD, author of Clinical Decision Support and Appropriateness of Antimicrobial Prescribing: A Randomized Trial, published in the November 9 issue of JAMA, the Journal of the American Medical Association. Summary points: 1. Repetitive use of a diagnostic and treatment algorithm to ingrain new prescribing habits was a valuable part of this practice change intervention. 2. Clinical decision support systems (CDSS) are feasibly implemented in practice settings that lack electronic medical records, including rural communities. 3. CDSS needs to be integrated with tools that save clinicians' time to be sustainable.




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Antiretroviral Treatment of Adult HIV Infection 2012 Recommendations of the International Antiviral Society-USA Panel

Interview with Melanie A. Thompson, MD, and Paul A. Volberding, MD, authors of Antiretroviral Treatment of Adult HIV Infection 2012 Recommendations of the International Antiviral Society-USA Panel. Summary Points:

  • Antiretroviral treatment is recommended and should be offered to all persons with HIV, regardless of CD4 cell count.
  • Particular attention should be paid to the design of an antiretroviral regimen for persons with concurrent conditions, such as viral hepatitis, opportunistic infections, and other medical diseases, because of the potential for drug interactions.
  • Monitoring of entry into and retention in HIV care, adherence to antiretroviral therapy, and quality of care indicators are recommended and should be used to increase care engagement and quality.




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Initial Management of Acute Pancreatitis

This JAMA Clinical Guidelines Synopsis summarizes the American Gastroenterological Association Institute’s 2018 guideline on initial management of acute pancreatitis.




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Progress in Multiple Sclerosis Research: An Example of Bedside to Bench

This Viewpoint attributes improved understanding of the role of autoantibodies and B-cell activity in MS pathogenesis and the development of effective therapies to the ability of physician-scientists to bring clinical insights to laboratory research and it emphasizes the importance of supporting and encouraging these investigators to reinvigorate science at the bedside.




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The Equitable Distribution of COVID-19 Therapeutics and Vaccines

This Viewpoint proposes a framework for international cooperation among governments and organizations to replace competition and hoarding with equitable global distribution of COVID-19 therapeutics and vaccines as they are developed.




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Surgery in a Time of Uncertainty—The Need for Universal Respiratory Precautions in the Operating Room

This Viewpoint proposes that universal respiratory precautions in the operating room—use of respirators with face masks and eye protection—could protect staff from possible coronavirus disease 2019 (COVID-19) infection and facilitate resumption of elective surgeries canceled during the first wave of the pandemic.




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Forty Years of A Piece of My Mind

Forty years ago, in 1980, Jimmy Carter was president. Pac-Man debuted. In medicine, smallpox was declared to be eradicated. Additionally, on May 9, 1980, A Piece of My Mind was inaugurated in JAMA. The first essay, “Tuna on Rye, 1984,” was written by then–senior editor Samuel Vaisrub under the pen name Sam Vee. He introduced the column with an editorial entitled “For the Peace of Your Mind.”




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For the Peace of Your Mind

We hasten to assure our readers that a piece of my mind...is not intended as a sounding board for peevish gripes, nit-picking beefs, or sundry assortments of righteous indignation, which are usually prefaced by an angry “let me give you a piece of my mind.” Nor is this section of The Journal meant to be a podium for pompous preachments and ex cathedra pronouncements. Nor again is it designed to be a forum for half-baked speculations and warmed-over hypotheses. Least of all is a piece of my mind envisaged as a jamboree of jokes and a shivaree of limericks.




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My Friend Claims Her Second Round of Cancer

As my Italian father would say, since the house is burning      let us warm ourselves, and so




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The Changing of the Seasons

In this narrative medicine essay, a level-one trauma nurse compares Arizona’s 2 seasons with the waning and the waxing of patient admissions and with the cycle of grief for loss of her mother and son, realizing how much their deaths have affected her nursing.




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Of What Am I Afraid? Plumbing the Depths

In this narrative medicine essay, a psychologist peels back the layers of her reticence and comes to terms with working with transgender patients as a member of LGBT community.




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The Cost of Technology—Patient-Centered Care

In this narrative medicine essay, a primary care physician describes a drawing by a 7-year-old patient who is sitting on an examination table with her mother cradling her baby sister with the physician’s back to them entering data in the computer as an example of a system that is sacrificing human contact for electronics.




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To Isaiah, a Casualty of a Fractured System

In this narrative medicine essay, Donald M. Berwick shares the story of his patient Isaiah with the 2012 Harvard Medical School graduating class as an example of a patient who deserved the treatment that cured him of leukemia but whose life was lost to poverty and exhorts them to regard health care as human right that must be preserved in the clinic and in public.




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Learning to Talk: Speaking the Language of Patients

In this narrative medicine essay, a resident physician recalls the joy she felt while learning the formal language of medicine as a student and anticipates the lifelong joy of learning to interpret that language in ways most helpful for her patients.




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John Lennon’s Elbow: The Long, Winding Road of the EMR Progress Note

In this narrative medicine essay, an attending physician shares his observations of how the changing nature of electronic medical record (EMR) hospital progress notes—often entered out of sequence and becoming ever longer and more unreadable—can hamper interacting with patients and providing patient care.




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The Sound of Silence—When There Are No Words

In this narrative medicine essay, a surgeon and palliative care physician describes the isolating silence that she felt her after the slaying of her father in Egypt when she was 18 years old and how that lingering silence has come to guide her when sitting with patients, when there are no words.




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A dual-targeted CeO2–DNA nanosensor for real-time imaging of H2O2 to assess atherosclerotic plaque vulnerability

J. Mater. Chem. B, 2020, 8,3502-3505
DOI: 10.1039/C9TB02459J, Communication
Zhenhua Liu, Yujie Cao, Xiaona Zhang, Huazhen Yang, Yujie Zhao, Wen Gao, Bo Tang
A novel dual-targeted CeO2–DNA nanosensor by modifying with folic acid (FA) and CD36 antibody was designed.
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Highly efficient electrochemiluminescence of ruthenium complex-functionalized CdS quantum dots and their analytical application

J. Mater. Chem. B, 2020, 8,3598-3605
DOI: 10.1039/C9TB02463H, Paper
Xiaofei Wang, Huiwen Liu, Honglan Qi, Qiang Gao, Chengxiao Zhang
Highly efficient electrochemiluminescence of ruthenium complex-functionalized CdS quantum dots via ECL resonance energy transfer (ECL-RET) and their analytical application.
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Electrodeposition of nickel nanostructures using silica nanochannels as confinement for low-fouling enzyme-free glucose detection

J. Mater. Chem. B, 2020, 8,3616-3622
DOI: 10.1039/C9TB02472G, Paper
Jialian Ding, Xinru Li, Lin Zhou, Rongjie Yang, Fei Yan, Bin Su
This work reports an enzyme-free glucose sensor based on nickel nanostructures electrodeposited on a fluorine-doped tin oxide (FTO) electrode modified with a silica nanochannel membrane (SNM).
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Ti3C2Tx MXene-derived TiO2/C-QDs as oxidase mimics for the efficient diagnosis of glutathione in human serum

J. Mater. Chem. B, 2020, 8,3513-3518
DOI: 10.1039/C9TB02478F, Communication
Zhaoyong Jin, Gengfang Xu, Yusheng Niu, Xiaoteng Ding, Yaqian Han, Wenhan Kong, Yanfeng Fang, Haitao Niu, Yuanhong Xu
A Ti3C2Tx MXene-derived TiO2/C-QD oxidase mimic was developed and used for the efficient diagnosis of glutathione in human serum.
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Recent advances of tissue-interfaced chemical biosensors

J. Mater. Chem. B, 2020, 8,3371-3381
DOI: 10.1039/C9TB02476J, Review Article
Chuanrui Chen, Yue Guo, Peining Chen, Huisheng Peng
This review discusses recent advances of tissue interfaced chemical biosensors, highlights current challenges and gives an outlook on future possibilities.
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Glutamate detection at the cellular level by means of polymer/enzyme multilayer modified carbon nanoelectrodes

J. Mater. Chem. B, 2020, 8,3631-3639
DOI: 10.1039/C9TB02461A, Paper
Miriam Marquitan, Melanie D. Mark, Andrzej Ernst, Anna Muhs, Stefan Herlitze, Adrian Ruff, Wolfgang Schuhmann
Carbon nanoelectrodes in the sub-micron range were modified with an enzyme cascade immobilized in a spatially separated polymer double layer system for the detection of glutamate at the cellular level.
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Nucleoside-based fluorescent carbon dots for discrimination of metal ions

J. Mater. Chem. B, 2020, 8,3640-3646
DOI: 10.1039/C9TB02758K, Paper
Tieli Zhou, Jinyi Zhang, Biwu Liu, Shihong Wu, Peng Wu, Juewen Liu
Using nucleosides and citrate as starting materials, a series of fluorescent carbon dots were synthesized showing different quenching properties by metal ions for their detection by a sensor array.
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Recent development of biofuel cell based self-powered biosensors

J. Mater. Chem. B, 2020, 8,3393-3407
DOI: 10.1039/C9TB02428J, Review Article
Shuai Hao, Xiaoxuan Sun, He Zhang, Junfeng Zhai, Shaojun Dong
BFC-based SPBs have been used as power sources for other devices and as sensors for detecting toxicity and BOM.
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From design to applications of stimuli-responsive hydrogel strain sensors

J. Mater. Chem. B, 2020, 8,3171-3191
DOI: 10.1039/C9TB02692D, Review Article
Dong Zhang, Baiping Ren, Yanxian Zhang, Lijian Xu, Qinyuan Huang, Yi He, Xuefeng Li, Jiang Wu, Jintao Yang, Qiang Chen, Yung Chang, Jie Zheng
Stimuli-responsive hydrogel strain sensors that synergize the advantages of both hydrogel and smart functional materials have attracted increasing interest from material design to emerging applications in health monitors and human–machine interfaces.
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Structurally coloured contact lens sensor for point-of-care ophthalmic health monitoring

J. Mater. Chem. B, 2020, 8,3519-3526
DOI: 10.1039/C9TB02389E, Paper
Yunlong Wang, Qilong Zhao, Xuemin Du
A structurally coloured contact lens sensor has been developed for point-of-care diagnosis of eye diseases.
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Silver nanoprism-based plasmonic ELISA for sensitive detection of fluoroquinolones

J. Mater. Chem. B, 2020, 8,3667-3675
DOI: 10.1039/C9TB02776A, Paper
Meifang Yuan, Qirong Xiong, Ganggang Zhang, Zhijuan Xiong, Daofeng Liu, Hongwei Duan, Weihua Lai
Silver nanoprism-based plasmonic ELISA for qualitative and quantitative detection of fluoroquinolones.
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Aptamer-based nanostructured interfaces for the detection and release of circulating tumor cells

J. Mater. Chem. B, 2020, 8,3408-3422
DOI: 10.1039/C9TB02457C, Review Article
Pi Ding, Zhili Wang, Zeen Wu, Weipei Zhu, Lifen Liu, Na Sun, Renjun Pei
This paper summarizes various aptamer-functionalized nanostructured interfaces for the detection and release of circulating tumor cells.
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Novel perylene probe-encapsulated metal–organic framework nanocomposites for ratiometric fluorescence detection of ATP

J. Mater. Chem. B, 2020, 8,3661-3666
DOI: 10.1039/C9TB02319D, Paper
Xiaomeng Zhou, Juanmin Li, Li-Li Tan, Qiang Li, Li Shang
Schematic illustration of PDI@ZIF-8 nanocomposite synthesis and ratiometric fluorescence assay for ATP sensing. 2-MIm: 2-methylimidazole.
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Toehold-regulated competitive assembly to accelerate the kinetics of graphene oxide-based biosensors

J. Mater. Chem. B, 2020, 8,3683-3689
DOI: 10.1039/C9TB02454A, Paper
Huan Du, Junbo Chen, Jie Zhang, Rongxing Zhou, Peng Yang, Xiandeng Hou, Nansheng Cheng
With toehold-regulation, the kinetics of graphene oxide-based biosensors can be accelerated.
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Assessing the range of enzymatic and oxidative tunability for biosensor design

J. Mater. Chem. B, 2020, 8,3460-3487
DOI: 10.1039/C9TB02666E, Review Article
Hattie C. Schunk, Derek S. Hernandez, Mariah J. Austin, Kabir S. Dhada, Adrianne M. Rosales, Laura J. Suggs
This review aims to inspire novel biosensor design by addressing materials chemistries through the lense of enzymatic and oxidative susceptibility in the spectra of inflammatory disease biomarkers.
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