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Journal articles on the topic 'H2S strip test'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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1

Martins, M. T., G. Castillo, and B. J. Dutka. "Evaluation of drinking water treatment plant efficiency in microorganism removal by the coliphage, total coliform and H2S paper strip tests." Water Science and Technology 35, no. 11-12 (1997): 403–7. http://dx.doi.org/10.2166/wst.1997.0767.

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Two potable water quality monitoring tests, the H2S paper strip test and coliphage test, were evaluated on Chilean raw potable source waters and drinking waters that had received conventional treatment to render them safe for drinking. Based on 108 samples in this study, it was found that the H2S paper strip provided consumers with equivalent to, or greater protection than, the total coliform MPN test. In treated water, a highly significant relationship (P =<0.0001) between total coliforms and H2S paper strip tests was observed. Significant relationships were also observed between total
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2

Pillai, J., K. Mathew, R. Gibbs, and G. E. Ho. "H2S paper strip method – a bacteriological test for faecal coliforms in drinking water at various temperatures." Water Science and Technology 40, no. 2 (1999): 85–90. http://dx.doi.org/10.2166/wst.1999.0092.

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Epidemics arising from waterborne diseases are a global health problem. Faecal contamination of drinking water is the main cause of these outbreaks. According to WHO (1996) for drinking water to be safe, a 100 ml sample should not contain any coliform bacteria. The standard methods currently used for routine testing have many limitations especially when applied in remote areas. The H2S method has been developed as an on-site, inexpensive and easy to use method to test drinking water for remote and rural areas. The present work analyses the reliability of the H2S method for detecting faecal con
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3

Anishchenko, Evgeniya, Carmela Vigorito, Luigi Mele, Patrizia Lombari, Alessandra Perna, and Diego Ingrosso. "Novel Applications of Lead Acetate and Flow Cytometry Methods for Detection of Sulfur-Containing Molecules." Methods and Protocols 2, no. 1 (2019): 13. http://dx.doi.org/10.3390/mps2010013.

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Hydrogen sulfide (H2S) is the most recently established gaseous vasodilator, enzymatically produced from cysteine metabolism, involved in a number of pathophysiological processes. However, its accurate detection in vivo is critical due to its volatility and tendency to form sulfane sulfur derivatives, thus limiting the data interpretation of its biological roles. We developed new applications of the simple and rapid method to measure H2S release in cell culture systems, based on the lead acetate strip test. This test, previously prevalently used in microbiology, was compared with the agar trap
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4

Vigorito, Carmela, Evgeniya Anishchenko, Luigi Mele, et al. "Uremic Toxin Lanthionine Interferes with the Transsulfuration Pathway, Angiogenetic Signaling and Increases Intracellular Calcium." International Journal of Molecular Sciences 20, no. 9 (2019): 2269. http://dx.doi.org/10.3390/ijms20092269.

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(1) The beneficial effects of hydrogen sulfide (H2S) on the cardiovascular and nervous system have recently been re-evaluated. It has been shown that lanthionine, a side product of H2S biosynthesis, previously used as a marker for H2S production, is dramatically increased in circulation in uremia, while H2S release is impaired. Thus, lanthionine could be classified as a novel uremic toxin. Our research was aimed at defining the mechanism(s) for lanthionine toxicity. (2) The effect of lanthionine on H2S release was tested by a novel lead acetate strip test (LAST) in EA.hy926 cell cultures. Effe
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5

Castillo, G., R. Duarte, Z. Ruiz, et al. "Evaluation of disinfected and untreated drinking water supplies in chile by the h2s paper strip test." Water Research 28, no. 8 (1994): 1765–70. http://dx.doi.org/10.1016/0043-1354(94)90249-6.

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6

Sivaborvorn, Komol, and B. J. Dutka. "Coliphage Presence in Various Types of Potable Water in Thailand." Water Quality Research Journal 24, no. 4 (1989): 583–88. http://dx.doi.org/10.2166/wqrj.1989.036.

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Abstract Three types of drinking water used in Thailand, tap water, rain water and deep well water (200 m) were tested for bacteriological and coliphage content. 13.5% of the samples contained only coliphage and 13% contained both coliphage and total coliforms. The incidence of coliphage in these potable water supplies reflect the probability of human pathogenic virus also surviving in these waters. The H2S paper-strip test was found to be an equally sensitive indicator of coliform presence compared to MF and MPN total coliform procedures.
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7

Parmar, Vikas, and Madhubala Purohit. "Faecal Contamination in Ground Water Resources of Urban Areas of Ujjain." International Journal of Scientific Research and Management 8, no. 03 (2020): 42–46. http://dx.doi.org/10.18535/ijsrm/v8i03.b01.

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Ground water is one of the most important natural resource next to air being essential for life. Quality of ground water depends upon natural process, such as wet/dry condition, salts, many geogenic and anthropogenic activities. Among all contamination ground water is more susceptible to microbial contamination. According to WHO report about 80% of all diseases in human being are caused due to drinking water contaminated by bacteria of faecal origin. Various water born diseases are prevalent in Ujjain like typhoid, dysentery, jaundice, amebeosis, colitis etc. Purpose of the study was to assess
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8

Gawthorne, Tanya, Robyn A. Gibbs, Kuruvilla Mathew, and Goen E. Ho. "H2S papers as presumptive tests for Salmonella contamination in tropical drinking water." Water Science and Technology 34, no. 7-8 (1996): 187–94. http://dx.doi.org/10.2166/wst.1996.0621.

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Coliform bacteria may not be adequate as sole indicators of recent faecal contamination in tropical waters. Salmonella spp. in particular have been found in tropical waters in the absence of traditional indicator bacteria. Remote areas without access to a laboratory have no opportunity for salmonellae analysis as portable tests are currently not available. H2S papers indicate the presence of hydrogen sulphide producing bacteria, a characteristic shared by the majority of Salmonella spp.. The potential of H2S papers to act as a presumptive test for salmonellae in the absence of coliform bacteri
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9

Tian, Zhen-Nan, Ding-Qi Wu, Xue-Jiao Sun, Ting-Ting Liu, and Zhi-Yong Xing. "A Benzothiazole-Based Fluorescent Probe for Ratiometric Detection of Al3+ and Its Application in Water Samples and Cell Imaging." International Journal of Molecular Sciences 20, no. 23 (2019): 5993. http://dx.doi.org/10.3390/ijms20235993.

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An easily prepared benzothiazole-based probe (BHM) was prepared and characterized by general spectra, including 1H NMR, 13C NMR, HRMS, and single-crystal X-ray diffraction. Based on the synergistic mechanism of the inhabitation of intramolecular charge transfer (ICT), the BHM displayed high selectivity and sensitivity for Al3+ in DMF/H2O (v/v, 1/1) through an obvious blue-shift in the fluorescent spectrum and significant color change detected by the naked eye, respectively. The binding ratio of BHM with Al3+ was 1:1, as determined by the Job plot, and the binding details were investigated usin
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10

Zhang, You-Ming, Bing-Bing Han, Peng-Peng Mao, et al. "A novel fluorescent sensor based on 4-(diethylamino)-2-(hydroxy)-phenyl imine functionalized naphthalimide for highly selective and sensitive detection of CN– and Fe3+." Canadian Journal of Chemistry 97, no. 8 (2019): 597–602. http://dx.doi.org/10.1139/cjc-2018-0138.

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In this work, a novel sensor molecule HB1, based on a 4-(diethylamino)-2-(hydroxy)-phenyl imine functionalized naphthalimide derivative, was successfully designed and synthesized. Interestingly, the HB1 showed fluorescence identification ability for CN– in DMSO/H2O (8:2, v/v) solution. After addition of CN– into the HB1 solution, the fluorescence intensity of HB1 solution could be enhanced obviously. The anti-disturbance experiments demonstrated that other anions could not interfere in the detection of CN–. On the other hand, HB1 was capable of dual-channel (absorption and fluorescence) detect
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11

Kang, Y. T., Y. Fujita, and T. Kashiwagi. "Combined Heat and Mass Transfer Under Different Inlet Subcooling Modes During NH3-H2O Falling Film Absorption Process." Journal of Energy Resources Technology 123, no. 3 (2001): 242–49. http://dx.doi.org/10.1115/1.1377895.

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Experiments were conducted for ammonia-water falling film absorption in a plate heat exchanger with offset strip fins. The objectives of this paper were to analyze combined heat and mass transfer during the ammonia-water absorption process under different inlet subcooling modes, and to obtain heat transfer coefficients (Nusselt number). This paper examined the effects of the inlet subcooling modes, the inlet concentration difference, liquid Reynolds number, and vapor Reynolds number on the heat transfer performance. Inlet liquid concentrations were set at 0, 5, 10, and 15 percent in mass of am
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12

Mungarndee, Suriyaphun S., Robert F. Lundy, and Ralph Norgren. "Expression of Fos during sham sucrose intake in rats with central gustatory lesions." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 295, no. 3 (2008): R751—R763. http://dx.doi.org/10.1152/ajpregu.90344.2008.

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For humans and rodents, ingesting sucrose is rewarding. This experiment tested the prediction that the neural activity produced by sapid sucrose reaches reward systems via projections from the pons through the limbic system. Gastric cannulas drained ingested fluid before absorption. For 10 days, the rats alternated an hour of this sham ingestion between sucrose and water. On the final test day, half of them sham drank water and the other half 0.6 M sucrose. Thirty minutes later, the rats were killed and their brains immunohistochemically stained for Fos. The groups consisted of controls and ra
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13

Alippi, A. M., and A. C. López. "First Report of Leaf Spot Disease of Maize Caused by Pantoea ananatis in Argentina." Plant Disease 94, no. 4 (2010): 487. http://dx.doi.org/10.1094/pdis-94-4-0487a.

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From 2007 to 2008, an uncharacterized disease of maize (Zea mays L.) was observed in commercial fields of Laguna Blanca, Formosa, Argentina and from different fields of Santa Fe and Catamarca provinces of Argentina. Symptoms included light-colored necrotic streaks on leaves and tan or white irregular blotches that sometimes were surrounded by reddish purple-to-dark brown margins. Severity of symptoms varied greatly from one field to another. Abundant bacterial streaming was observed from lesions when examined at ×150. Gram-negative, facultatively anaerobic bacteria were consistently isolated f
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14

Akhlaque, Mohammad, Naseer Ahmad Chaudhry, and Farakh A. Khan. "Bacteriological Analysis of Drinking Water along the Karakorum Highway (KKH)." Annals of King Edward Medical University 9, no. 4 (2016). http://dx.doi.org/10.21649/akemu.v9i4.1373.

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The present study was undertaken to asses the bacteriological quality of drinking water in Northern Areas of Pakistan. This study was comprised of total 32 water samples taken from river, water in distribution system and spring from different areas along the Karakorum Highway (KKH) from Thahkot to Khunjrab pass. Chlorination may affect the results, so its status was enquired from the local peoples and found that none of the 32 sample points in the residential areas were chlorinated. All the water samples were tested for contamination by H2S strip Test. This study revealed that, according to WH
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15

Al-Zahrani, Fatimah A. M., Reda M. El-Shishtawy, Abdullah M. Asiri, et al. "A new phenothiazine-based selective visual and fluorescent sensor for cyanide." BMC Chemistry 14, no. 1 (2020). http://dx.doi.org/10.1186/s13065-019-0656-x.

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AbstractA new donor-π-acceptor derived from phenothiazine, namely 2-(2-((10-hexyl-10H-phenothiazin-3-yl)methylene)-3-oxo-2,3-dihydroinden-1-ylidene) malononitrile (PTZON) was synthesized and fully characterized, and its potential as a fluorescent sensor for cyanide anion was investigated. The PTZON showed a visible absorption band at 564 nm corresponds to an intramolecular charge transfer (ICT) and an emission band at 589 nm in CH3CN/H2O. The results of cyanide anion titration revealed ratiometric changes in both absorption and fluorescence spectra as a result of the nucleophilic addition of c
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