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  1. AU="Firoz Ahmed"
  2. AU="Dżugan, Małgorzata"
  3. AU="Rolf Bjerkvig"
  4. AU=Khosravi-Far Roya
  5. AU="Udeochu, Joe C"
  6. AU="Osoba, Osonde A." AU="Osoba, Osonde A."
  7. AU="Palani, Sowmiya"
  8. AU="Manfred Frick"
  9. AU="Jensen, Leonard"
  10. AU="Pakhomov, Evgeny A."
  11. AU="Subramanyam, Chithirala Bala"
  12. AU=Petrek J A
  13. AU="Thomson-Baker, B"
  14. AU=Shahidi Shahrzad
  15. AU="Taylor, Holly A"
  16. AU="Yeong Jeong Jeon"
  17. AU="Bueno-Cavanillas, Aurora"
  18. AU="Kavčič, Tina"
  19. AU="Arias-Jiménez, José Luís"
  20. AU="Tünçok, Ekin"
  21. AU="Roberto Toro"
  22. AU="Bharti Sahu"
  23. AU="Soo-Yeon Choi"
  24. AU="Nono, Sandra"
  25. AU="Diepens, Robin J W"
  26. AU="Baselga-Garriga, Clara"

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  1. Artikel ; Online: Influence of Bulk and Surface Interactions from Thick, Porous, Soil-based Substrates on the Spreading Behavior of Different Viscosity Oils

    Firoz Ahmed / Brenda Hutton-Prager

    Environmental Challenges, Vol 3, Iss , Pp 100045- (2021)

    2021  

    Abstract: Crude oils and motor oils are commonly identified in oil spills on land. Controlling and understanding their flow both across and into land is of paramount importance to minimize spread and subsequent damage to the ecosystem. Spreading kinetics and ... ...

    Abstract Crude oils and motor oils are commonly identified in oil spills on land. Controlling and understanding their flow both across and into land is of paramount importance to minimize spread and subsequent damage to the ecosystem. Spreading kinetics and surface energy studies were conducted with these oils over several realistic soil-based matrixes, consisting of topsoil (silt-dominant), sand, clay, and moisture. Spreading area through a 1.3 cm deep matrix was reduced with increased moisture content, densely packed matrixes, and higher viscosity oils. Initial contact angle (CA) measurements for all oils was typically lower on clay matrixes due to its sheet-like structure and high absorption capabilities. Individual droplet penetration took longer at lower MC in direct contradiction to bulk kinetics studies, suggesting different spreading behavior across the surface border. Low viscosity oils recorded the highest lateral spreads, and incomplete wetting profiles were identified for most conditions tested. Importantly, dimensionless profiles of droplet diameter and CA with time did not conform to universal behavior, with statistically significant influences of matrix heterogeneity, oil viscosity, and ill-controlled surface roughness identified. Flow regimes of oil droplets instead conformed to vertical spreading through thick matrixes, and a delayed lateral spreading that occurred quite late into the total penetration time of the droplet. These findings, obtained from studying realistic soil-based matrixes, draws new conclusions regarding the important influences of matrix thickness, variable porosity, and chemical heterogeneity on fluid flow behavior. This new knowledge will assist in the development of future containment efforts surrounding oil spills.
    Schlagwörter Crude oil ; Motor oil ; Spreading kinetics ; Wettability ; Contact angle ; Thick porous substrates ; Environmental sciences ; GE1-350
    Thema/Rubrik (Code) 660
    Sprache Englisch
    Erscheinungsdatum 2021-04-01T00:00:00Z
    Verlag Elsevier
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  2. Artikel ; Online: Durable biobased hybrid compounds

    Md. Ibrahim H. Mondal / Md. Inzamamul Haque / Firoz Ahmed

    Arabian Journal of Chemistry, Vol 16, Iss 9, Pp 105093- (2023)

    Potential modifying agents for the development of functional cotton fabrics

    2023  

    Abstract: The advancement of antibacterial, stain-resistant, and easy-to-clean multifunctional cotton fabrics finds its scientific appeal and practical value due to their multidisciplinary uses in pharmacy, sanitation, clinics, etc. In this investigation, the ... ...

    Abstract The advancement of antibacterial, stain-resistant, and easy-to-clean multifunctional cotton fabrics finds its scientific appeal and practical value due to their multidisciplinary uses in pharmacy, sanitation, clinics, etc. In this investigation, the cotton fabric was immersed in chitosan- vinyltriethoxy silane (Ch-VTES) and N-(2-hydroxy)propyl-3-trimethylammonium chitosan chloride- vinyltriethoxy silane (HTACC-VTES), prepared via the cost-effective sol–gel process to produce self-cleaning and antimicrobial cotton fabrics for end-uses. The Ch-VTES and HTACC-VTES modified cotton fabrics showed encouraging water contact angles of 102° and 139° respectively i.e. closer to superhydrophobicity as well as strong self-cleaning behavior without compromising the physicochemical properties of unmodified cotton fabric. Notably, the modified fabric demonstrated enchanting bacterial killing efficiency with a noticeable zone of inhibition against E. coli (17 mm for Ch-VTES and 21 mm for HTACC-VTES modified fabrics) and S. aureus (20 mm for Ch-VTES and 25 mm for HTACC-VTES modified fabrics) bacteria. Both modified cotton textiles showed an absorption peak at 1208 cm−1 (Si-O-C bending) in FTIR, suggesting that silane binds to the cotton substrate more firmly. The stability and longevity of the modified cotton fabrics with desired properties remain unchanged till 15 cycles of washing for the antibacterial test and the 20 cycles for the water contact angle. The fabricated textiles would be used for a wide range of uses, including medical applications as well as personal care products.
    Schlagwörter Antibacterial ; Easy-cleaning ; Cotton textile ; Quaternary chitosan ; Silane ; Chemistry ; QD1-999
    Thema/Rubrik (Code) 540
    Sprache Englisch
    Erscheinungsdatum 2023-09-01T00:00:00Z
    Verlag Elsevier
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  3. Artikel ; Online: Extraction, characterization and functionality assessment of Aloe vera, chitosan and silk sericin

    Joykrisna Saha / Md. Ibrahim H. Mondal / Firoz Ahmed / Mahbubur Rahman

    Arabian Journal of Chemistry, Vol 16, Iss 9, Pp 105087- (2023)

    2023  

    Abstract: Aloe vera, chitosan, and silk sericin have been investigated for their physicochemical properties as well as functional characteristics such as antibacterial, antioxidant, and UV resistance. Aloe vera was extracted by methanol as a solvent. Silk sericin ... ...

    Abstract Aloe vera, chitosan, and silk sericin have been investigated for their physicochemical properties as well as functional characteristics such as antibacterial, antioxidant, and UV resistance. Aloe vera was extracted by methanol as a solvent. Silk sericin was prepared from a boiled water solution of silk cocoons through ethanol precipitation, while chitosan was synthesized by deacetylation of chitin. FT-IR, TGA, DSC, EDX, UV–vis, and XRD were used to characterize the extracted Aloe vera, chitosan, and sericin. Antibacterial activity, antioxidant activity and UV protection factors were also investigated. The TGA graph revealed that the significant weight loss at 400 °C was 39%, 51%, and 52%. for Aloe vera, chitosan, and sericin, respectively. For E. coli, Aloe vera, chitosan, and silk sericin, the zones of inhibition were 2.5 mm, 3 mm, and 1 mm, respectively, whereas for S. aureus, the zones of inhibition were 4 mm, 5 mm, and 1.5 mm. The free radical scavenging activity of 10 mg/ml Aloe vera, chitosan and sericin was 93%, 53% and 52%, respectively. All three UV radiation zones were absorbed by an Aloe vera solution. Chitosan and silk sericin solution exclusively absorbed UV-C rays. These almost priceless natural resources can contribute to health-related beneficial issues.
    Schlagwörter Aloe vera ; Chitosan ; Silk sericin ; Antibacterial activity ; Anti-oxidant property and ultraviolet protection factor ; Chemistry ; QD1-999
    Thema/Rubrik (Code) 540
    Sprache Englisch
    Erscheinungsdatum 2023-09-01T00:00:00Z
    Verlag Elsevier
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  4. Artikel ; Online: Does gender inequality matter for access to and utilization of maternal healthcare services in Bangladesh?

    Firoz Ahmed / Fahmida Akter Oni / Sk Sharafat Hossen

    PLoS ONE, Vol 16, Iss 9, p e

    2021  Band 0257388

    Abstract: There is a high prevalence of gender gap in Bangladesh which might affect women's likelihood to receive maternal healthcare services. In this backdrop, we aim to investigate how gender inequality measured by intrahousehold bargaining power (or autonomy) ... ...

    Abstract There is a high prevalence of gender gap in Bangladesh which might affect women's likelihood to receive maternal healthcare services. In this backdrop, we aim to investigate how gender inequality measured by intrahousehold bargaining power (or autonomy) of women and their attitudes towards intimate partner violence (IPV) affects accessing and utilizing maternal health care services. We used Bangladesh Demographic and Health Survey (BDHS) data of 2014 covering 5460 women who gave birth at least one child in the last three years preceding the survey. We performed logistic regression to estimate the effect of women's autonomy and their attitude towards IPV on access to and utilization of maternal healthcare services. Besides, we employed different channels to understand the heterogeneous effect of gender inequality on access to maternal healthcare services. We observed that women having autonomy positively influenced attaining five required antenatal care (ANC) services (AOR: 1.17; 95% CI: 0.98-1.41) and women's negative attitudes towards IPV were positively associated with five ANC services (AOR: 1.42; 95% CI: 1.02-1.97), sufficient ANC visits (COR: 1.55; CI: 1.19-2.01), skilled birth attendant (SBA) (AOR: 1.43; 95% CI: 1.05-1.94) and postnatal care (PNC) services (AOR: 1.44; 95% CI: 1.12-1.84). Besides, rural residency, religion, household wealth, education of both women and husband were found to have some of the important channels which were making stronger effect of gender inequality on access to maternal healthcare services. The findings of our study indicate a significant association between access to maternal healthcare services and women's autonomy as well as attitude towards IPV in Bangladesh. We, therefore, recommend to protect women from violence at home and mprove their intrahousehold bargaining power to increase their access to and utilization of required maternal healthcare services.
    Schlagwörter Medicine ; R ; Science ; Q
    Thema/Rubrik (Code) 360
    Sprache Englisch
    Erscheinungsdatum 2021-01-01T00:00:00Z
    Verlag Public Library of Science (PLoS)
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  5. Artikel ; Online: Impact of Feed Point Position on Patch Antenna’s Return Loss and Bandwidth for UWB Applications

    Md. Firoz Ahmed / Md. Hasnat Kabir / Abu Zafor Md. Touhidul Islam

    Journal of Multidisciplinary Applied Natural Science, Vol 4, Iss 1, Pp 30-

    2023  Band 38

    Abstract: The demand for compact, lightweight, and high-performance antennas has increased in recent times in the communication industry. Microstrip patch antenna (MPA) becomes a better choice to effectively fulfill these requirements. In this study, hybrid ... ...

    Abstract The demand for compact, lightweight, and high-performance antennas has increased in recent times in the communication industry. Microstrip patch antenna (MPA) becomes a better choice to effectively fulfill these requirements. In this study, hybrid techniques of partial ground plane, slotted patch, and defective ground structure are employed in MPA design to reduce the return loss, good impedance matching, and increased the bandwidth, gain, and efficiency of the antenna. This research demonstrates the impact of altering the feed point position, a crucial phenomenon of antenna design, on the patch antenna and determines the proper feed point location by comparing a minimum return loss (S11) which achieves the highest performance for the designed antenna. High-frequency structure simulator (HFSS) software is used to design and simulate the patch antenna. The operating frequency of the antenna is 6.85 GHz for UWB applications (3.1–10.6 GHz). A FR4 epoxy substrate material with dimensions of 30 mm × 20 mm is used to design the antenna. It has a dielectric constant of 4.4, a thickness of 0.8 mm and a tangent loss of 0.02. Multiple resonant frequencies are observed with different return losses for each feed location. The analysis shows that the finest feeding point is found at the center of the patch (9, 0) with a very low return loss (-28.35 dB), and a high impedance bandwidth (19.7 GHz). The antenna also achieved a gain of 4.46 dB, a directivity of 4.6904 dB, and a radiation efficiency of 95.90%. Hence, the location of the feed point can be considered as an influential factor in the antenna design.
    Schlagwörter patch antenna ; return loss ; bandwidth ; feed point position ; hfss ; uwb ; fr4 ; hybrid technique ; Science ; Q
    Thema/Rubrik (Code) 600
    Sprache Englisch
    Erscheinungsdatum 2023-06-01T00:00:00Z
    Verlag Pandawa Institute
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  6. Artikel ; Online: Physiotherapy in Bangladesh

    Firoz Ahmed Mamin / Rieke Hayes

    Frontiers in Public Health, Vol

    Inequality Begets Inequality

    2018  Band 6

    Abstract: BackgroundThe demand for health services in developing countries often outweighs provision. This article describes the present condition of physiotherapy in Bangladesh. Physiotherapy is not recognized as a profession by the government. There is no single ...

    Abstract BackgroundThe demand for health services in developing countries often outweighs provision. This article describes the present condition of physiotherapy in Bangladesh. Physiotherapy is not recognized as a profession by the government. There is no single registration and regulation body. The health-related and economic benefits of physiotherapy are not felt by the majority of Bangladeshi citizens.Areas coveredThe burden of disease is changing, and Bangladesh needs a profession that specializes in physical rehabilitation to face these challenges. This article outlines the benefits to patients and the wider economy from a broad physiotherapy regime for all Bangladeshi citizens. It describes the many barriers the profession faces.ConclusionPhysiotherapy is efficacious in many post-trauma situations and long-term conditions. Economic evidence supports the provision physiotherapy as a cost-effective treatment which should be considered as part of the provision of a universal health-care service. Official recognition of the protected “physiotherapist” title and a single registration and regulation agency are recommended.
    Schlagwörter Bangladesh ; sustainable development goals ; universal health coverage ; rehabilitation ; physiotherapy ; Public aspects of medicine ; RA1-1270
    Thema/Rubrik (Code) 360
    Sprache Englisch
    Erscheinungsdatum 2018-03-01T00:00:00Z
    Verlag Frontiers Media S.A.
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  7. Artikel ; Online: Prevalence and molecular detection of multidrug-resistant Salmonella spp. isolated from eggshells in the local markets of Dhaka, Bangladesh

    Talal Hossain / Md. Abu Sayem Khan / Md. Firoz Ahmed / Sabita Rezwana Rahman

    International Journal of One Health, Vol 8, Iss 2, Pp 101-

    2022  Band 107

    Abstract: Background and Aim: Salmonella spp. are frequently associated with various parts of the egg, including the shell, and cause foodborne outbreaks worldwide. Antibiotic-resistant Salmonella spp. pose serious threats to human and animal health; therefore, ... ...

    Abstract Background and Aim: Salmonella spp. are frequently associated with various parts of the egg, including the shell, and cause foodborne outbreaks worldwide. Antibiotic-resistant Salmonella spp. pose serious threats to human and animal health; therefore, preventive measures against these pathogens are important. This study aimed to isolate and characterize Salmonella spp. from eggshell samples from different local markets in Dhaka, Bangladesh. Materials and Methods: Salmonella spp. were recovered from eggshells by enrichment culture and biochemical tests and characterized through molecular amplification of Salmonella-specific genes. Antibiotic sensitivity testing and molecular detection of isolates were performed by disk diffusion method and polymerase chain reaction (PCR), respectively. The invA, fliC, and sdfI genes were used in PCR to identify the genus Salmonella, and the species Salmonella Typhimurium and Salmonella Enteritidis, respectively. Results: The prevalence of Salmonella spp. was recorded as 40%, in which S. Typhimurium was the predominant serotype. PCR analysis revealed that 100%, 59%, and 13.6% of these isolates possessed the invA, fliC, and sdfI genes, respectively. The isolates exhibited multidrug resistance phenotypes, with resistance (95.5%) toward tetracycline, sulfamethoxazole, and clindamycin and sensitivity (86.3%) toward chloramphenicol. Conclusion: The findings of this study reflect the potential of eggs as a reservoir of multidrug-resistant Salmonella spp.; therefore, we recommend the careful handling of eggs to avoid contamination from farm to market.
    Schlagwörter antibiotic resistance ; eggs ; health hazards ; poultry industry ; salmonella ; Medicine ; R ; Medicine (General) ; R5-920
    Thema/Rubrik (Code) 616
    Sprache Englisch
    Erscheinungsdatum 2022-11-01T00:00:00Z
    Verlag Veterinary World
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  8. Artikel ; Online: Molecular docking and dynamics simulation study of medicinal fungi derived secondary metabolites as potential inhibitor for COVID-19 treatment

    Md Abu Sayem Khan / Md Ibrahim Miah / Zahidul Islam / Sunjida Afrin / Md Firoz Ahmed / Sabita Rezwana Rahman

    Informatics in Medicine Unlocked, Vol 41, Iss , Pp 101305- (2023)

    2023  

    Abstract: The severity of COVID-19, lack of specific treatment, and controversies on the vaccine's efficacy demand the development of new drugs against SARS-CoV-2. Fungi produce various metabolites with diverse molecular structures that have emerged as promising ... ...

    Abstract The severity of COVID-19, lack of specific treatment, and controversies on the vaccine's efficacy demand the development of new drugs against SARS-CoV-2. Fungi produce various metabolites with diverse molecular structures that have emerged as promising antiviral drug candidates. Therefore, the present study aimed to investigate medicinal fungi derived secondary metabolites as potential inhibitors of 3 different targets associated with viral entry (human TMPRSS2) and replication (main and papain-like protease) through molecular docking and dynamic simulation studies. Based on our findings, we identified Phelligridin E, Lepiotaprocerine G, and Inoscavin A as the potential blockers of SARS-CoV-2 main protease, papain-like protease, and human TMPRSS2, respectively. These compounds strongly interacted with their corresponding target, passed Lipinski Rule's and had acceptable ADMET properties. Drug-protein complexes showed good stability during MD simulation. Estimation of binding free energy using the MM-GBSA method validated the inhibitor potential of identified compounds. Taken together, we believe that further in vitro and in vivo investigations on our proposed molecules may contribute to expanding the therapeutic arsenal in our fight against COVID-19.
    Schlagwörter SARS-CoV-2 ; COVID-19 ; Medicinal fungi ; Metabolites ; Docking simulation ; Computer applications to medicine. Medical informatics ; R858-859.7
    Thema/Rubrik (Code) 540
    Sprache Englisch
    Erscheinungsdatum 2023-01-01T00:00:00Z
    Verlag Elsevier
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  9. Artikel ; Online: Health and safety issues among construction workers in Bangladesh

    Firoz Ahmed Mamin / Ganesh Dey / Shazal Kumar Das

    International Journal of Occupational Safety and Health, Vol 9, Iss

    2019  Band 1

    Abstract: Background: Bangladesh is a rapidly developing country. Lots of infrastructures are set up every year. A large number of people are working in the construction industry. Work related injuries and deaths of construction workers are common. The aim of this ...

    Abstract Background: Bangladesh is a rapidly developing country. Lots of infrastructures are set up every year. A large number of people are working in the construction industry. Work related injuries and deaths of construction workers are common. The aim of this study was to find the health and safety awareness of informal construction workers. Methodology: This study was a cross sectional study by using a preset questionnaire among the construction workers in Bangladesh. Results: Participants of this study had lower income and education. About 87% of participants did not receive any health and safety training and did not wear safety equipment when they were working. About 57% of the participants had a history of injury. This study also found that the main reasons for the non-use of safety equipment were lack of safety equipment, motivation and training. Conclusion: Construction workers are not adequately aware about health and safety issues that relate to them.
    Schlagwörter Bangladesh ; construction workers ; health and safety ; injury ; Public aspects of medicine ; RA1-1270
    Thema/Rubrik (Code) 690
    Sprache Englisch
    Erscheinungsdatum 2019-08-01T00:00:00Z
    Verlag Occupational Health and Safety Society of Nepal
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  10. Artikel ; Online: Health and safety issues among construction workers in Bangladesh

    Firoz Ahmed Mamin / Ganesh Dey / Shazal Kumar Das

    International Journal of Occupational Safety and Health, Vol 9, Iss 1, Pp 13-

    2019  Band 18

    Abstract: Background: Bangladesh is a rapidly developing country. Lots of infrastructures are set up every year. A large number of people are working in the construction industry. Work related injuries and deaths of construction workers are common. The aim of this ...

    Abstract Background: Bangladesh is a rapidly developing country. Lots of infrastructures are set up every year. A large number of people are working in the construction industry. Work related injuries and deaths of construction workers are common. The aim of this study was to find the health and safety awareness of informal construction workers. Methodology: This study was a cross sectional study by using a preset questionnaire among the construction workers in Bangladesh. Results: Participants of this study had lower income and education. About 87% of participants did not receive any health and safety training and did not wear safety equipment when they were working. About 57% of the participants had a history of injury. This study also found that the main reasons for the non-use of safety equipment were lack of safety equipment, motivation and training. Conclusion: construction workers are not adequately aware about health and safety issues that relate to them.
    Schlagwörter key words: bangladesh ; construction workers ; health and safety ; injury ; Public aspects of medicine ; RA1-1270
    Thema/Rubrik (Code) 690
    Sprache Englisch
    Erscheinungsdatum 2019-08-01T00:00:00Z
    Verlag Occupational Health and Safety Society of Nepal
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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