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  1. Article ; Online: Evaluation of bactericidal efficacy of silver ions on Escherichia coli for drinking water disinfection.

    Pathak, Satya P / Gopal, K

    Environmental science and pollution research international

    2012  Volume 19, Issue 6, Page(s) 2285–2290

    Abstract: Purpose: The purpose of this study is the development of a suitable process for the disinfection of drinking water by evaluating bactericidal efficacy of silver ions from silver electrodes.: Methods: A prototype of a silver ioniser with silver ... ...

    Abstract Purpose: The purpose of this study is the development of a suitable process for the disinfection of drinking water by evaluating bactericidal efficacy of silver ions from silver electrodes.
    Methods: A prototype of a silver ioniser with silver electrodes and control unit has been fabricated. Silver ions from silver electrodes in water samples were estimated with an atomic absorption spectrophotometer. A fresh culture of Escherichia coli (1.75 × 10(3) c.f.u./ml) was exposed to 1, 2, 5, 10 and 20 ppb of silver ions in 100 ml of autoclaved tap water for 60 min. The effect of different pH and temperatures on bactericidal efficacy was observed at constant silver ion concentration (5 ppb) and contact time of 30 min.
    Results: The maximum bactericidal activity (100%) was observed at 20 ppb of silver ion concentration indicating total disinfection after 20 min while minimum bactericidal activity (25%) was observed after 10 min at 01 ppb of silver ions. Likewise, 100% bactericidal activity was noticed with 2, 5 and 10 ppb of silver ions after 60, 50 and 40 min, respectively. Bactericidal activity at pH 5, 6, 7, 8 and 9 was observed at 79.9%, 79.8%, 80.5%, 100% and 100%, respectively, whereas it was 80.4%, 88.3%, 100%, 100% and 100% at 10°C, 20°C, 30°C, 40°C and 50°C, respectively.
    Conclusion: The findings of this study revealed that very low concentrations of silver ions at pH 8-9 and temperature >20°C have bactericidal efficacy for total disinfection of drinking water. Silver ionisation is suitable for water disinfection and an appropriate alternative to chlorination which forms carcinogenic disinfection by-products.
    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Disinfection/methods ; Dose-Response Relationship, Drug ; Drinking Water/analysis ; Drinking Water/microbiology ; Escherichia coli/drug effects ; Hydrogen-Ion Concentration ; Silver/analysis ; Silver/pharmacology ; Spectrophotometry, Atomic ; Temperature ; Water Purification/methods
    Chemical Substances Anti-Bacterial Agents ; Drinking Water ; Silver (3M4G523W1G)
    Language English
    Publishing date 2012-01-18
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-011-0735-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: NAD+ depletion enhances reovirus-induced oncolysis in multiple myeloma.

    Kennedy, Barry E / Giacomantonio, Michael / Murphy, J Patrick / Cutler, Samuel / Sadek, Maryanne / Konda, Prathyusha / Paulo, Joao A / Pathak, Gopal P / Renkens, Saskia H J / Grieve, Stacy / Pol, Jonathan / Gygi, Steven P / Richardson, Christopher / Gaston, Daniel / Reiman, Anthony / Kroemer, Guido / Elnenaei, Manal O / Gujar, Shashi A

    Molecular therapy oncolytics

    2022  Volume 24, Page(s) 695–706

    Abstract: Cancer cell energy metabolism plays an important role in dictating the efficacy of oncolysis by oncolytic viruses. To understand the role of multiple myeloma metabolism in reovirus oncolysis, we performed semi-targeted mass spectrometry-based ... ...

    Abstract Cancer cell energy metabolism plays an important role in dictating the efficacy of oncolysis by oncolytic viruses. To understand the role of multiple myeloma metabolism in reovirus oncolysis, we performed semi-targeted mass spectrometry-based metabolomics on 12 multiple myeloma cell lines and revealed a negative correlation between NAD+ levels and susceptibility to oncolysis. Likewise, a negative correlation was observed between the activity of the rate-limiting NAD+ synthesis enzyme NAMPT and oncolysis. Indeed, depletion of NAD+ levels by pharmacological inhibition of NAMPT using FK866 sensitized several myeloma cell lines to reovirus-induced killing. The myelomas that were most sensitive to this combination therapy expressed a functional p53 and had a metabolic and transcriptomic profile favoring mitochondrial metabolism over glycolysis, with the highest synergistic effect in KMS12 cells. Mechanistically, U-
    Language English
    Publishing date 2022-02-20
    Publishing country United States
    Document type Journal Article
    ISSN 2372-7705
    ISSN 2372-7705
    DOI 10.1016/j.omto.2022.02.017
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Bacterial contamination and antibiotic resistance in fecal coliforms from glacial water runoff.

    Pathak, S P / Gopal, K

    Bulletin of environmental contamination and toxicology

    2007  Volume 79, Issue 2, Page(s) 163–167

    MeSH term(s) Anti-Bacterial Agents/pharmacology ; Drug Resistance, Bacterial ; Environmental Monitoring ; Escherichia coli/drug effects ; Escherichia coli/isolation & purification ; Feces/microbiology ; Fresh Water/microbiology ; Ice Cover ; India ; Water Microbiology ; Water Pollution/analysis ; Water Supply/analysis
    Chemical Substances Anti-Bacterial Agents
    Language English
    Publishing date 2007-08
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 6895-0
    ISSN 1432-0800 ; 0007-4861
    ISSN (online) 1432-0800
    ISSN 0007-4861
    DOI 10.1007/s00128-007-9128-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Prevalence of bacterial contamination with antibiotic-resistant and enterotoxigenic fecal coliforms in treated drinking water.

    Pathak, S P / Gopal, K

    Journal of toxicology and environmental health. Part A

    2008  Volume 71, Issue 7, Page(s) 427–433

    Abstract: Pollution indicator bacteria such as coliforms, fecal coliforms, and fecal streptococci were enumerated using a multiple-tube fermentation method in 100 treated drinking-water samples from 20 locations in residential, commercial, and industrial areas of ... ...

    Abstract Pollution indicator bacteria such as coliforms, fecal coliforms, and fecal streptococci were enumerated using a multiple-tube fermentation method in 100 treated drinking-water samples from 20 locations in residential, commercial, and industrial areas of a tropical city during summer. Thirty-four percent of the samples were bacteriologically nonpotable. Maximum coliform-contaminated (27%) samples were derived from industrial areas, while samples contaminated with fecal coliform (23%) and fecal streptococci (20%) originated from commercial areas. Coliforms identified as Escherichia coli, Klebsiella sp., Enterobacter sp., and Citrobacter sp. were present in 29%, 26%, 24%, and 15% of samples, respectively. Fecal coliforms were examined for antibiotic susceptibility with disc diffusion method. All test isolates exhibited multiple antibiotic resistance (MAR) for kanamycin, nalidixic acid, tetracycline, and trimethoprim. Escherichia coli isolates were examined for enterotoxigenicity using the suckling mice bioassay and 60% of the isolates displayed enterotoxigenicity. Data indicate that drinking water contaminated with antibiotic-resistant enterotoxigenic fecal bacteria may be responsible for presence of waterborne diarrheal diseases attributed to therapeutic agents used by urban populations in the tropics.
    MeSH term(s) Colony Count, Microbial ; Decontamination/methods ; Drug Resistance, Multiple, Bacterial ; Enterotoxigenic Escherichia coli/drug effects ; Enterotoxigenic Escherichia coli/isolation & purification ; Environmental Monitoring ; Fresh Water/microbiology ; Humans ; India ; Water Microbiology ; Water Pollution/analysis ; Water Pollution/prevention & control ; Water Supply/analysis
    Language English
    Publishing date 2008
    Publishing country England
    Document type Journal Article
    ZDB-ID 1413345-3
    ISSN 1528-7394 ; 0098-4108 ; 1087-2620
    ISSN 1528-7394 ; 0098-4108 ; 1087-2620
    DOI 10.1080/15287390701838796
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Combined effect of substance P and curcumin on cutaneous wound healing in diabetic rats.

    Kant, Vinay / Kumar, Dinesh / Prasad, Raju / Gopal, Anu / Pathak, Nitya N / Kumar, Pawan / Tandan, Surender K

    The Journal of surgical research

    2017  Volume 212, Page(s) 130–145

    Abstract: Background: Our earlier studies demonstrated that topically applied substance P (SP) or curcumin ...

    Abstract Background: Our earlier studies demonstrated that topically applied substance P (SP) or curcumin on excision skin wound accelerated the wound healing in streptozotocin-induced diabetic rats. In the present study, we aimed to evaluate the wound healing potential of combination of SP and curcumin in diabetic rats.
    Materials and methods: Open cutaneous excision wound was created on the back of each of the 60 diabetic rats. Wound-inflicted rats were equally divided into three groups namely, control, gel treated, and SP + curcumin treated. Normal saline, pluronic gel, and SP (0.5 × 10
    Results: SP + curcumin combination significantly accelerated wound closure and decreased messenger RNA expressions of tumor necrosis factor-alpha, interleukin-1beta, and matrix metalloproteinase-9, whereas the combination markedly increased the expressions of interleukin-10, vascular endothelial growth factor, transforming growth factor-beta1, hypoxia-inducible factor 1-alpha, stromal cell-derived factors-1alpha, heme oxygenase-1 and endothelial nitric oxide synthase, and activities of superoxide dismutase, catalase, and glutathione peroxidase in granulation-healing tissue, compared with control and gel-treated groups. In combination group, granulation tissue was better, as was evidenced by improved fibroblast proliferation, collagen deposition, microvessel density, growth-associated protein 43-positive nerve fibers, and thick regenerated epithelial layer.
    Conclusions: The combination of SP and curcumin accelerated wound healing in diabetic rats and both the drugs were compatible at the doses used in this study.
    MeSH term(s) Administration, Cutaneous ; Animals ; Anti-Inflammatory Agents/pharmacology ; Anti-Inflammatory Agents/therapeutic use ; Biomarkers/metabolism ; Curcumin/pharmacology ; Curcumin/therapeutic use ; Diabetes Mellitus, Experimental/complications ; Diabetes Mellitus, Experimental/metabolism ; Diabetes Mellitus, Experimental/pathology ; Drug Therapy, Combination ; Male ; Neurotransmitter Agents/pharmacology ; Neurotransmitter Agents/therapeutic use ; Rats ; Rats, Wistar ; Skin/drug effects ; Skin/injuries ; Skin/metabolism ; Skin/pathology ; Substance P/pharmacology ; Substance P/therapeutic use ; Treatment Outcome ; Wound Healing/drug effects ; Wound Healing/physiology ; Wounds and Injuries/complications ; Wounds and Injuries/drug therapy ; Wounds and Injuries/metabolism ; Wounds and Injuries/pathology
    Chemical Substances Anti-Inflammatory Agents ; Biomarkers ; Neurotransmitter Agents ; Substance P (33507-63-0) ; Curcumin (IT942ZTH98)
    Language English
    Publishing date 2017-01-28
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80170-7
    ISSN 1095-8673 ; 0022-4804
    ISSN (online) 1095-8673
    ISSN 0022-4804
    DOI 10.1016/j.jss.2017.01.011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Strong Anharmonicity-Induced Low Thermal Conductivity and High n-type Mobility in the Topological Insulator Bi

    Pathak, Riddhimoy / Dutta, Prabir / Srivastava, Ashutosh / Rawat, Divya / Gopal, Radha Krishna / Singh, Abhishek K / Soni, Ajay / Biswas, Kanishka

    Angewandte Chemie (International ed. in English)

    2022  Volume 61, Issue 41, Page(s) e202210783

    Abstract: Intrinsically low lattice thermal conductivity ( ... ...

    Abstract Intrinsically low lattice thermal conductivity (κ
    Language English
    Publishing date 2022-09-02
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202210783
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  7. Article ; Online: Detection and isolation of selected genes of interest from metagenomic libraries by a DNA microarray approach.

    Pathak, Gopal P / Gärtner, Wolfgang

    Methods in molecular biology (Clifton, N.J.)

    2010  Volume 668, Page(s) 299–312

    Abstract: A DNA microarray-based approach is described for screening metagenomic libraries for the presence of selected genes. The protocol is exemplified for the identification of flavin-binding, blue-light-sensitive biological photoreceptors (BL), based on a ... ...

    Abstract A DNA microarray-based approach is described for screening metagenomic libraries for the presence of selected genes. The protocol is exemplified for the identification of flavin-binding, blue-light-sensitive biological photoreceptors (BL), based on a homology search in already sequenced, annotated genomes. The microarray carried 149 different 54-mer oligonucleotides, derived from consensus sequences of BL photoreceptors. The array could readily identify targets carrying 4% sequence mismatch, and allowed unambiguous identification of a positive cosmid clone of as little as 10 ng against a background of 25 μg of cosmid DNA. The protocol allows screening up to 1,200 library clones in concentrations as low as ca. 20 ng, each with a ca. 40 kb insert size readily in a single batch. Calibration and control conditions are outlined. This protocol, when applied to the thermophilic fraction of a soil sample, yielded the identification and functional characterization of a novel, BL-encoding gene that showed a 58% similarity to a known, BL-encoding gene from Kineococcus radiotolerans SRS30216 (similarity values refer to the respective LOV domains).
    MeSH term(s) Amino Acid Sequence ; DNA, Bacterial/genetics ; DNA, Bacterial/isolation & purification ; Gene Library ; Genes, Bacterial ; Metagenome ; Metagenomics/instrumentation ; Metagenomics/methods ; Molecular Sequence Data ; Molecular Structure ; Oligonucleotide Array Sequence Analysis/instrumentation ; Oligonucleotide Array Sequence Analysis/methods ; Sequence Alignment
    Chemical Substances DNA, Bacterial
    Language English
    Publishing date 2010
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1940-6029
    ISSN (online) 1940-6029
    DOI 10.1007/978-1-60761-823-2_21
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Identifying social determinants of health from clinical narratives: A study of performance, documentation ratio, and potential bias.

    Yu, Zehao / Peng, Cheng / Yang, Xi / Dang, Chong / Adekkanattu, Prakash / Gopal Patra, Braja / Peng, Yifan / Pathak, Jyotishman / Wilson, Debbie L / Chang, Ching-Yuan / Lo-Ciganic, Wei-Hsuan / George, Thomas J / Hogan, William R / Guo, Yi / Bian, Jiang / Wu, Yonghui

    Journal of biomedical informatics

    2024  Volume 153, Page(s) 104642

    Abstract: Objective: To develop a natural language processing (NLP) package to extract social determinants of health (SDoH) from clinical narratives, examine the bias among race and gender groups, test the generalizability of extracting SDoH for different disease ...

    Abstract Objective: To develop a natural language processing (NLP) package to extract social determinants of health (SDoH) from clinical narratives, examine the bias among race and gender groups, test the generalizability of extracting SDoH for different disease groups, and examine population-level extraction ratio.
    Methods: We developed SDoH corpora using clinical notes identified at the University of Florida (UF) Health. We systematically compared 7 transformer-based large language models (LLMs) and developed an open-source package - SODA (i.e., SOcial DeterminAnts) to facilitate SDoH extraction from clinical narratives. We examined the performance and potential bias of SODA for different race and gender groups, tested the generalizability of SODA using two disease domains including cancer and opioid use, and explored strategies for improvement. We applied SODA to extract 19 categories of SDoH from the breast (n = 7,971), lung (n = 11,804), and colorectal cancer (n = 6,240) cohorts to assess patient-level extraction ratio and examine the differences among race and gender groups.
    Results: We developed an SDoH corpus using 629 clinical notes of cancer patients with annotations of 13,193 SDoH concepts/attributes from 19 categories of SDoH, and another cross-disease validation corpus using 200 notes from opioid use patients with 4,342 SDoH concepts/attributes. We compared 7 transformer models and the GatorTron model achieved the best mean average strict/lenient F1 scores of 0.9122 and 0.9367 for SDoH concept extraction and 0.9584 and 0.9593 for linking attributes to SDoH concepts. There is a small performance gap (∼4%) between Males and Females, but a large performance gap (>16 %) among race groups. The performance dropped when we applied the cancer SDoH model to the opioid cohort; fine-tuning using a smaller opioid SDoH corpus improved the performance. The extraction ratio varied in the three cancer cohorts, in which 10 SDoH could be extracted from over 70 % of cancer patients, but 9 SDoH could be extracted from less than 70 % of cancer patients. Individuals from the White and Black groups have a higher extraction ratio than other minority race groups.
    Conclusions: Our SODA package achieved good performance in extracting 19 categories of SDoH from clinical narratives. The SODA package with pre-trained transformer models is available at https://github.com/uf-hobi-informatics-lab/SODA_Docker.
    MeSH term(s) Humans ; Natural Language Processing ; Social Determinants of Health ; Female ; Male ; Narration ; Bias ; Electronic Health Records ; Documentation/methods ; Data Mining/methods
    Language English
    Publishing date 2024-04-14
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2057141-0
    ISSN 1532-0480 ; 1532-0464
    ISSN (online) 1532-0480
    ISSN 1532-0464
    DOI 10.1016/j.jbi.2024.104642
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Evaluation of the presence-absence (P-A) test: A simplified bacteriological test for detecting coliforms in rural drinking water of India.

    Ramteke, P W / Pathak, S P / Bhattacherjee, J W / Gopal, K / Mathur, N

    Environmental monitoring and assessment

    2013  Volume 33, Issue 1, Page(s) 53–59

    Abstract: ... surface water and piped supplies were tested in order to compare the presence-absence (P-A) test with standard ... 1030 (74.88%) were positive by the MPN and P-A test, respectively. The P-A test detected 96 ... of the positives detected by the MPN test. The P-A test may be effectively used as a rapid screening method ...

    Abstract One thousand three-hundred and ninety-four drinking water sources comprising ground water, surface water and piped supplies were tested in order to compare the presence-absence (P-A) test with standard MPN method to detect coliforms as indicators of water quality. Out of 1394 samples, 1074 (77.04%) and 1030 (74.88%) were positive by the MPN and P-A test, respectively. The P-A test detected 96% of the positives detected by the MPN test. The P-A test may be effectively used as a rapid screening method to detect coliform contamination in less polluted sources such as ground water and piped supplies.
    Language English
    Publishing date 2013-11-07
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 782621-7
    ISSN 1573-2959 ; 0167-6369
    ISSN (online) 1573-2959
    ISSN 0167-6369
    DOI 10.1007/BF00546661
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  10. Article: Occurrence of antibiotic and metal resistance in bacteria from organs of river fish.

    Pathak, S P / Gopal, K

    Environmental research

    2005  Volume 98, Issue 1, Page(s) 100–103

    Abstract: Bacterial populations in some organs, viz., liver, spleen, kidney, gill, and arborescent organ of the catfish Clarias batrachus were enumerated followed by determination of resistance for antibiotics and metals. The total viable counts in these organs, ... ...

    Abstract Bacterial populations in some organs, viz., liver, spleen, kidney, gill, and arborescent organ of the catfish Clarias batrachus were enumerated followed by determination of resistance for antibiotics and metals. The total viable counts in these organs, observed, were 2.24x10(4), 2.08x10(4), 1.44x10(4), 1.23x10(4), and 6.40x10(3) colony-forming units/mL, respectively. The random bacterial isolates from these fish organs showed resistance in decreasing order for colistin (98%), ampicillin (82%), gentamycin (34%), carbenicillin (28%), tetracyline (20%), streptomycin (12%), and ciprofloxacin (02%). Most of the isolates exhibited an increasing order of tolerance for the metals (microg/mL) copper (100), lead (200), manganese (400), cadmium (200), and chromium (50), with minimum inhibitory concentration (MIC) ranging from <50 to 1600 microg/mL. These observations indicate that the significant occurrence of bacterial population in organs of fish with high incidence of resistance for antibiotics and metals may pose risk to fish fauna and public health.
    MeSH term(s) Animals ; Anti-Bacterial Agents/pharmacology ; Bacteria/drug effects ; Catfishes/microbiology ; Drug Resistance, Bacterial/physiology ; Metals, Heavy/pharmacology ; Microbial Sensitivity Tests ; Rivers ; Water Pollutants, Chemical/poisoning
    Chemical Substances Anti-Bacterial Agents ; Metals, Heavy ; Water Pollutants, Chemical
    Language English
    Publishing date 2005-05
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2004.05.012
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