keyword
https://read.qxmd.com/read/38174272/bismuth-ferrite-based-acetone-gas-sensor-evaluation-of-graphene-oxide-loading
#1
JOURNAL ARTICLE
Pandurang Ghadage, K P Shinde, Digambar Nadargi, Jyoti Nadargi, Hamid Shaikh, Mohammad Asif Alam, Imtiaz Mulla, Mohaseen S Tamboli, J S Park, Sharad Suryavanshi
We report a BiFeO3 /graphene oxide (BFO/GO) perovskite, synthesized using a CTAB-functionalized glycine combustion route, as a potential material for acetone gas sensing applications. The physicochemical properties of the developed perovskite were analysed using XRD, FE-SEM, TEM, HRTEM, EDAX and XPS. The gas sensing performance was analysed for various test gases, including ethanol, acetone, propanol, ammonia, nitric acid, hydrogen sulphide and trimethylamine at a concentration of 500 ppm. Among the test gases, the developed BFO showed the best selectivity towards acetone, with a response of 61% at an operating temperature of 250 °C...
January 2, 2024: RSC Advances
https://read.qxmd.com/read/38147197/a-review-on-inorganic-gaseous-pollutants-in-conservation-spaces-monitoring-instrumentation-and-indoor-concentrations
#2
REVIEW
Lisa Vergelli, Francesca Frasca, Chiara Bertolin, Gabriele Favero, Anna Maria Siani
This contribution presents the results of a review of scientific literature on gaseous inorganic pollutants monitored in confined indoor spaces housing cultural heritage. A survey on standards suggesting concentration thresholds together with European projects on the topic was provided. Sixty-six scientific articles were systematically selected based on the PRISMA flow diagram over the period 1984-2021 for a total number of 80 case studies mainly located in Europe (64%). Monitoring was mainly performed in museums and galleries (61%), specifically in exhibition rooms (79%)...
December 26, 2023: Environmental Monitoring and Assessment
https://read.qxmd.com/read/37687329/alleviation-of-adverse-effects-of-drought-stress-on-growth-and-nitrogen-metabolism-in-mungbean-vigna-radiata-by-sulphur-and-nitric-oxide-involves-up-regulation-of-antioxidant-and-osmolyte-metabolism-and-gene-expression
#3
JOURNAL ARTICLE
Huida Lian, Cheng Qin, Jie Shen, Mohammad Abass Ahanger
The influence of drought induced by polyethylene glycol (PEG) and the alleviatory effect of nitric oxide (50 µM) and sulphur (S, 1 mM K2 SO4 ) were studied in Vigna radiata . Drought stress reduced plant height, dry weight, total chlorophylls, carotenoids and the content of nitrogen, phosphorous, potassium and sulphur. The foliar applications of NO and sulphur each individually alleviated the decline, with a greater alleviation observed in seedlings treated with both NO and sulphur. The reduction in intermediates of chlorophyll synthesis pathways and photosynthesis were alleviated by NO and sulphur...
August 28, 2023: Plants (Basel, Switzerland)
https://read.qxmd.com/read/37511046/coronary-microvascular-dysfunction-evolving-understanding-of-pathophysiology-clinical-implications-and-potential-therapeutics
#4
REVIEW
Chun Yeung Kei, Kuljit Singh, Rustem F Dautov, Thanh H Nguyen, Yuliy Y Chirkov, John D Horowitz
Until recently, it has been generally held that stable angina pectoris (SAP) primarily reflects the presence of epicardial coronary artery stenoses due to atheromatous plaque(s), while acute myocardial infarction (AMI) results from thrombus formation on ruptured plaques. This concept is now challenged, especially by results of the ORBITA and ISCHEMIA trials, which showed that angioplasty/stenting does not substantially relieve SAP symptoms or prevent AMI or death in such patients. These disappointing outcomes serve to redirect attention towards anomalies of small coronary physiology...
July 10, 2023: International Journal of Molecular Sciences
https://read.qxmd.com/read/37325503/therapeutic-gas-releasing-nanomedicines-with-controlled-release-advances-and-perspectives
#5
REVIEW
Yaw Opoku-Damoah, Run Zhang, Hang T Ta, Zhi Ping Xu
Nanoparticle-based drug delivery has become one of the most popular approaches for maximising drug therapeutic potentials. With the notable improvements, a greater challenge hinges on the formulation of gasotransmitters with unique challenges that are not met in liquid and solid active ingredients. Gas molecules upon release from formulations for therapeutic purposes have not really been discussed extensively. Herein, we take a critical look at four key gasotransmitters, that is, carbon monoxide (CO), nitric oxide (NO), hydrogen sulphide (H2 S) and sulphur dioxide (SO2 ), their possible modification into prodrugs known as gas-releasing molecules (GRMs), and their release from GRMs...
October 2022: Exploration (Beijing)
https://read.qxmd.com/read/37048379/anti-inflammatory-and-vasorelaxant-effects-induced-by-an-aqueous-aged-black-garlic-extract-supplemented-with-vitamins-d-c-and-b12-on-cardiovascular-system
#6
JOURNAL ARTICLE
Lucia Recinella, Maria Loreta Libero, Valentina Citi, Annalisa Chiavaroli, Alma Martelli, Roberta Foligni, Cinzia Mannozzi, Alessandra Acquaviva, Simonetta Di Simone, Vincenzo Calderone, Giustino Orlando, Claudio Ferrante, Serena Veschi, Anna Piro, Luigi Menghini, Luigi Brunetti, Sheila Leone
Multiple studies demonstrated biological activities of aged black garlic, including anti-inflammatory, antioxidant, and cardioprotective effects. We aimed to investigate the protective effects of an aged black garlic water extract (ABGE) alone or in association with multivitamins consisting of combined Vitamins D, C, and B12, on mouse heart specimens exposed to E. coli lipopolysaccharide (LPS). Moreover, we studied the hydrogen sulphide (H2 S) releasing properties and the membrane hyperpolarization effect of the Formulation composed by ABGE and multivitamins, using Human Aortic Smooth Muscle Cells (HASMCs)...
April 6, 2023: Foods (Basel, Switzerland)
https://read.qxmd.com/read/36742165/gaseous-metabolites-as-therapeutic-targets-in-ulcerative-colitis
#7
REVIEW
Chu K Yao, Chen Sarbagili-Shabat
Diet therapies are currently under-utilised in optimising clinical outcomes for patients with active ulcerative colitis (UC). Furthermore, existing dietary therapies are framed by poorly defined mechanistic targets to warrant its success. There is good evidence to suggest that microbial production of gaseous metabolites, hydrogen sulfide (H2 S) and nitric oxide (NO) are implicated in the development of mucosal inflammation in UC. On a cellular level, exposure of the colonic epithelium to excessive concentrations of these gases are shown to promote functional defects described in UC...
January 28, 2023: World Journal of Gastroenterology: WJG
https://read.qxmd.com/read/36563571/nitric-oxide-and-hydrogen-sulfide-work-together-to-improve-tolerance-to-salinity-stress-in-wheat-plants-by-upraising-the-asa-gsh-cycle
#8
JOURNAL ARTICLE
Cengiz Kaya, Ferhat Ugurlar, Muhammed Ashraf, Pravej Alam, Parvaiz Ahmad
The participation of nitric oxide (NO) in wheat plant tolerance to salinity stress (SS) brought about by hydrogen sulphide (H2 S) via modifying the ascorbate-glutathione (AsA-GSH) cycle was studied. The SS-plants received either 0.2 mM sodium hydrosulfide (NaHS; H2 S donor), or NaHS plus 0.1 mM sodium nitroprusside (SNP; a NO donor) through the nutrient solution. Salinity stress decreased plant growth, leaf water status, leaf K+ , and glyoxalase II (gly II), while it elevated proline content, leaf Na+ content, oxidative stress, methylglyoxal (MG), glyoxalase I (gly I), the superoxide dismutase, catalase and peroxidase activities, contents of endogenous NO and H2 S...
November 30, 2022: Plant Physiology and Biochemistry: PPB
https://read.qxmd.com/read/36478328/role-of-hydrogen-sulphide-in-physiological-and-pathological-angiogenesis
#9
REVIEW
Yan-Xia Zhang, Mi-Rong Jing, Chun-Bo Cai, Shuai-Gang Zhu, Chao-Jing Zhang, Qi-Meng Wang, Yuan-Kun Zhai, Xin-Ying Ji, Dong-Dong Wu
The role of hydrogen sulphide (H2 S) in angiogenesis has been widely demonstrated. Vascular endothelial growth factor (VEGF) plays an important role in H2 S-induced angiogenesis. H2 S promotes angiogenesis by upregulating VEGF via pro-angiogenic signal transduction. The involved signalling pathways include the mitogen-activated protein kinase pathway, phosphoinositide-3 kinase pathway, nitric oxide (NO) synthase/NO pathway, signal transducer and activator of transcription 3 (STAT3) pathway, and adenosine triphosphate (ATP)-sensitive potassium (KATP ) channels...
December 7, 2022: Cell Proliferation
https://read.qxmd.com/read/36165928/effects-of-exogenous-taurine-on-growth-photosynthesis-oxidative-stress-antioxidant-enzymes-and-nutrient-accumulation-by-trifolium-alexandrinum-plants-under-manganese-stress
#10
JOURNAL ARTICLE
Arslan Hafeez, Rizwan Rasheed, Muhammad Arslan Ashraf, Muhammad Rizwan, Shafaqat Ali
Plants essentially require manganese (Mn) for their normal metabolic functioning. However, excess Mn in the cellular environment is detrimental to plant growth, development, and physio-biochemical functions. Taurine (TAU) is an amino acid with potent antioxidant and anti-inflammatory properties in animals and humans. However, no previous study has investigated the potential of TAU in plant metal stress tolerance. The current study provides some novel insights into the effect of TAU in modulating the defense system of Trifolium alexandrinum plants under Mn toxicity...
September 19, 2022: Chemosphere
https://read.qxmd.com/read/36163644/relaxation-mechanisms-of-chloroform-root-extracts-of-prangos-heyniae-and-prangos-uechtritzii-on-mouse-corpus-cavernosum
#11
JOURNAL ARTICLE
Elif Alan, Gokay Albayrak, Gulnur Sevin, Gunay Yetik-Anacak, Sura Baykan
Erectile dysfunction (ED) is the inability to achieve/maintain an erection. Because of the side effects, interactions, or ineffectiveness of currently used drugs, novel drug discovery studies are ongoing. The roots of Turkish endemic plants Prangos uechtritzii and Prangos heyniae are traditionally used as aphrodisiacs in Anatolia and contain coumarin-like relaxant compounds. This study aims to reveal the relaxant effect mechanisms of chloroform root extracts of P. heyniae (Ph-CE) and P. uechtritzii (Pu-CE)...
September 26, 2022: Andrologia
https://read.qxmd.com/read/36152705/the-participation-of-nitric-oxide-in-hydrogen-sulphide-mediated-chromium-tolerance-in-pepper-capsicum-annuum-l-plants-by-modulating-subcellular-distribution-of-chromium-and-the-ascorbate-glutathione-cycle
#12
JOURNAL ARTICLE
Cengiz Kaya, Ferhat Ugurlar, Muhammed Ashraf, Mohamed A El-Sheikh, Andrzej Bajguz, Parvaiz Ahmad
The promising response of chromium-stressed (Cr(VI)-S) plants to hydrogen sulphide (H2 S) has been observed, but the participation of nitric oxide (NO) synthesis in H2 S-induced Cr(VI)-S tolerance in plants remains to be elucidated. It was aimed to assess the participation of NO in H2 S-mediated Cr(VI)-S tolerance by modulating subcellular distribution of Cr and the ascorbate-glutathione (AsA-GSH) cycle in the pepper seedlings. Two weeks following germination, plants were exposed to control (no Cr) or Cr(VI)-S (50 μM K2 Cr2 O7 ) for further two weeks...
September 21, 2022: Environmental Pollution
https://read.qxmd.com/read/36033315/heating-and-emission-characteristics-from-combustion-of-charcoal-and-co-combustion-of-charcoal-with-faecal-char-sawdust-char-briquettes-in-a-ceramic-cook-stove
#13
JOURNAL ARTICLE
Austine O Otieno, Patrick G Home, James M Raude, Sylvia I Murunga, Anthony Gachanja
Over reliance on charcoal has accelerated deforestation in sub-Saharan Africa. Seeking alternative sustainable and environmentally friendly sources of biomass energy to meet the escalating energy demand is therefore vital. However, limited evidence exists on the concentrations of toxic emissions of different biomass fuels. Herein, dried human faeces and sawdust were pyrolyzed at 350 °C to produce biochar and mixed in equal ratio to produce briquettes through densification, with molasses (10 wt.%) used as a binder...
August 2022: Heliyon
https://read.qxmd.com/read/35753358/naphthalimide-derivatives-as-fluorescent-probes-for-imaging-endogenous-gasotransmitters
#14
REVIEW
M Ranjana, Dhanya Sunil
Gasotransmitters have gained significant recognition attributed to their evident biological impacts, and is accepted as a promising and less-explored area with immense research scope. The three-member family comprising of nitric oxide, carbon monoxide and hydrogen sulphide as endogenous gaseous signaling molecules have been found to elicit a plethora of crucial biological functions, spawning a new research area. The sensing of these small molecules is vital to gain deeper insights into their functions, as they can act both as a friend or a foe in mammalian systems...
June 23, 2022: Chemico-biological Interactions
https://read.qxmd.com/read/35723409/physiological-pathological-and-pharmacological-interactions-of-hydrogen-sulphide-and-nitric-oxide-in-the-myocardium-of-rats-with-left-ventricular-hypertrophy
#15
JOURNAL ARTICLE
Ashfaq Ahmad
Left ventricular hypertrophy (LVH) is characterized by increased myocardium thickness due to increased oxidative stress and downregulation of cystathione γ lyase (CSE) endothelial nitric oxide synthase (eNOS). Upregulation of CSE by hydrogen sulphide (H2 S) and ENOS by L-arginine can arrest the progression of LVH individually. The present study explored the combined treatment of H2 S and NO in the progression of LVH, and demonstrated that the response is due to H2 S, NO or formation of either new molecule in physiological, pathological, and pharmacological in vivo settings of LVH...
January 16, 2022: Current Issues in Molecular Biology
https://read.qxmd.com/read/35334141/hydrogen-sulphide-h-2-s-in-the-hidden-half-role-in-root-growth-stress-signalling-and-rhizospheric-interactions
#16
REVIEW
P Mathur, S Roy, M Nasir Khan, S Mukherjee
Apart from nitric oxide (NO) and carbon monoxide (CO), hydrogen sulphide (H2 S) has emerged as a potential gasotransmitter that has regulatory roles in root differentiation, proliferation and stress signalling. H2 S metabolism in plants exhibits spatio-temporal differences that are intimately associated with sulphide signalling in the cytosol and other subcellular components, e.g. chloroplast and mitochondria. H2 S biosynthesis in plant organs uses both enzymatic and non-enzymatic pathways. H2 S generation in roots and aerial organs is modulated by developmental phase and changes in environmental stimuli...
June 2022: Plant Biology
https://read.qxmd.com/read/35104157/the-effect-of-the-long-term-inhibition-of-hydrogen-sulfide-production-on-the-reactivity-of-the-cardiovascular-system-in-wistar-rats
#17
JOURNAL ARTICLE
Magdalena Drobna, Andrea Berenyiova, Sona Cacanyiova
In this study, we investigated the blood pressure responses of the peripheral bed in vivo after chronic hydrogen sulphide (H2S) inhibition combined with acute nitric oxide (NO) deficiency. We also evaluated the role of endogenously produced H2S in the vasoactive responses of large- and medium-sized arteries in vitro. Changes in integrated blood pressure responses were measured after chronic inhibition of cystathionine-γ-lyase, an enzyme involved in H2S synthesis, with DL-propargylglycine (PPG), and acute inhibition of NO-synthase with nonspecific L-NG-nitro arginine methyl ester (L-NAME), and vasoactive responses of the thoracic aorta (TA) and mesenteric artery (MA) were investigated after acute incubation with PPG...
February 1, 2022: Canadian Journal of Physiology and Pharmacology
https://read.qxmd.com/read/34866296/harnessing-the-power-of-hydrogen-sulphide-h-2-s-for-improving-fruit-quality-traits
#18
REVIEW
R Tayal, V Kumar, M Irfan
Hydrogen sulphide (H2 S) is a gaseous molecule and originates endogenously in plants. It is considered a potential signalling agent in various physiological processes of plants. Numerous reports have examined the role of H2 S in fruit ripening and in enhancing fruit quality traits. H2 S coordinates the fruit antioxidant system, fruit ripening phytohormones, such as ethylene and abscisic acid, together with other ripening-related signalling molecules, including nitric oxide and hydrogen peroxide. Although many studies have increased understanding of various aspects of this complex network, there is a gap in understanding crosstalk of H2 S with key players of fruit ripening, postharvest senescence and fruit metabolism...
December 5, 2021: Plant Biology
https://read.qxmd.com/read/34783146/hydrogen-sulphide-and-nitric-oxide-mitigate-the-negative-impacts-of-waterlogging-stress-on-wheat-triticum-aestivum-l
#19
JOURNAL ARTICLE
M F B Mfarrej, X Wang, M Hamzah Saleem, I Hussain, R Rasheed, M Arslan Ashraf, M Iqbal, M Sohaib Chattha, M Nasser Alyemeni
Nitric oxide (NO) and hydrogen sulphide (H2 S) are important gaseous signalling molecules that regulate key physiochemical mechanisms of plants under environmental stresses. A number of attempts have been made to improve waterlogging tolerance in plants, but with limited success. Having said that, NO and H2 S are vital signalling molecules, but their role in mitigating waterlogging effects on crop plants is not well established. We investigated the efficacy of exogenous NO and H2 S to alleviate waterlogging effects in two wheat cultivars (Galaxy-2013 and FSD-2008)...
November 15, 2021: Plant Biology
https://read.qxmd.com/read/34714595/emerging-nitric-oxide-and-hydrogen-sulphide-releasing-carriers-for-skin-wound-healing-therapy
#20
JOURNAL ARTICLE
Moisés L Pinto, Rosana Vieira Pinto, Sílvia Carvalho, Fernando Antunes, João Pires
Nitric oxide (NO) and hydrogen sulphide (H2S) have been recognized as important signalling molecules involved in multiple physiological functions, including wound healing. Their exogenous delivery has been established as a new route for therapies, being the topical application the nearest to commercialization. Nevertheless, the gaseous nature of these therapeutic agents and their toxicity at high levels imply additional challenges in the design of effective delivery systems, including the tailoring of their morphology and surface chemistry to get controllable release kinetics and suitable lifetimes...
October 29, 2021: ChemMedChem
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