46 research outputs found
An integrated experimental and theoretical approach to probe Cr (VI) uptake using decorated halloysite nanotubes for efficient water treatment
No full textHalloysite nanotubes (HNTs) were surface functionalized using four distinct chemical moieties (amidoxime, hydrazone, ethylenediamine (EDA), and diethylenetriamine (DETA)), producing modified HNTs (H1–H4) capable of binding with Cr(VI) ions. Advanced techniques like FTIR, XRD, SEM, and EDX provided evidence of the successful functionalization of these HNTs. Notably, the functionalization occurred on the surface of HNTs, rather than within the interlayer or lumen. These decorated HNTs were effective in capturing Cr(VI) ions at optimized sorption parameters, with adsorption rates ranging between 58–94%, as confirmed by atomic absorption spectroscopy (AAS). The mechanism of adsorption was further scrutinized through the Freundlich and Langmuir isotherms. Langmuir isotherms revealed the nearest fit to the data suggesting the monolayer adsorption of Cr(VI) ions onto the nanotubes, indicating a favorable adsorption process. It was hypothesized that Cr(VI) ions are primarily attracted to the amine groups on the modified nanotubes. Quantum chemical calculations further revealed that HNTs functionalized with hydrazone structures (H2) demonstrated a higher affinity (interaction energy −26.33 kcal mol−1) for the Cr(VI) ions. This can be explained by the formation of stronger hydrogen bonds with the NH moieties of the hydrazone moiety, than those established by the OH of oxime (H1) and longer amine chains (H3 and H4), respectively. Overall, the findings suggest that these decorated HNTs could serve as an effective and cost-efficient solution for treating water pollution.This article is published as Shah, Syed Nadeem Ahmad, Sonia Zulfiqar, Fernando Ruipérez, Muhammad Rafique, Mudassir Iqbal, Michael J. Forrester, Muhammad Ilyas Sarwar, and Eric W. Cochran. "An integrated experimental and theoretical approach to probe Cr (VI) uptake using decorated halloysite nanotubes for efficient water treatment." RSC advances 14, no. 5 (2024): 2947-2960. doi: https://doi.org/10.1039/D3RA07675J. © 2024 The Author(s). This Open Access Article is licensed under a Creative Commons Attribution-Non Commercial 3.0
Antecedents and Outcome of Electronic Word of Mouth (EWOM) Moderating Role of Product Involvement
No full textIn this competitive world, the consumers are now becoming less attentive and aware towards traditional ways of advertising so that's why many companies are now focusing to reduce spending toward commercial advertising and diverting more toward the word of mouth promotions. For this reason, electronic word of mouth eWOM is under the constant consideration of academician and practitioners. Seeing the importance of eWOM in recent times the current study seeks to model the antecedents and outcomes of eWOM. Specifically, this study examines the impact of source credibility, message appeal and brand equity on purchase intentions through eWOM. A survey questionnaire is used to test the said objectives. Data is collected from 224 mobile users with the help of convenient sampling. In general, the results of the study are in favor of the validation of measures and proposed rational paths. This study offers empirical evidence which may provide solid grounds for practical implication
Study on fabrication of electrospun polymeric nanofibers for wound care and drug delivery（エレクトロスピニング法を用いた創傷治療用および薬剤運搬用高分子ナノファイバーの作製に関する研究）
No full text信州大学(Shinshu university)博士（工学）この博士論文は、次の学術雑誌論文を一部に使用しています。 / Polymers 13(4) :510(2021); doi:10.3390/polym13040510 © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)./ Current Research in Biotechnology 4 :445-458(2022); doi:10.1016/j.crbiot.2022.09.008 © 2022 The Author(s). Published by Elsevier B.V./ Polymers 14(7) :1361-(2022); doi:10.3390/polym14071361 © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).ThesisSARWAR MUHAMMAD NAUMAN. Study on fabrication of electrospun polymeric nanofibers for wound care and drug delivery（エレクトロスピニング法を用いた創傷治療用および薬剤運搬用高分子ナノファイバーの作製に関する研究）. 信州大学, 2024, 博士論文. 博士（工学）, 甲第822号, 令和06年03月20日授与.doctoral thesi
Study on fabrication of electrospun polymeric nanofibers for wound care and drug delivery（エレクトロスピニング法を用いた創傷治療用および薬剤運搬用高分子ナノファイバーの作製に関する研究）
No full textこの博士論文は、次の学術雑誌論文を一部に使用しています。 / Polymers 13(4) :510(2021); doi:10.3390/polym13040510 © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)./ Current Research in Biotechnology 4 :445-458(2022); doi:10.1016/j.crbiot.2022.09.008 © 2022 The Author(s). Published by Elsevier B.V./ Polymers 14(7) :1361-(2022); doi:10.3390/polym14071361 © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).ThesisSARWAR MUHAMMAD NAUMAN. Study on fabrication of electrospun polymeric nanofibers for wound care and drug delivery（エレクトロスピニング法を用いた創傷治療用および薬剤運搬用高分子ナノファイバーの作製に関する研究）. 信州大学, 2024, 博士論文. 博士（工学）, 甲第822号, 令和06年03月20日授与
After-sales services, brand equity and purchasing intention to buy second-hand product
No full textThis study aims to examine the concept of brand equity and willingness to buy second-handproducts in the automobile context. The customer-based brand equity model is used as a theoretical lens toexamine after-sales services, brand credibility and brand loyalty as drivers of brand equity and willingness tobuy the second-hand product
Study Attitude And Academic Achievement At Secondary Level In Pakistan
No full textThe author compared study attitudes of low and high achievers by using a self-developed study attitude scale (SAS) consisting of 36 items. Academic performance was measured through marks obtained by the students in the 9th grade examination conducted by the external body. The analysis revealed that the study attitude of secondary school students was related with their academic achievement. A t-test for independent samples showed that there was a significant difference between the study attitude of male, female, rural and urban students
When is it safe to operate after the failure of therapeutic steroid injections in carpal tunnel syndrome?
No full textCarpal Tunnel Syndrome (CTS) is a multifactorial neuropathy caused by the compression of the median nerve due to its entrapment as it passes through the carpal tunnel in the wrist. It accounts for nearly 90% of neuropathies and usually presents as numbness, tingling, weakness, and pain. These symptoms are predominantly present in the thumb, second finger, third finger, and radial half of the hand's fourth finger. In the US, CTS has a prevalence of 50 per 1,000, which is similar to the prevalence in other developed countries.1 Overall, the prevalence of CTS in the general population in developed countries ranges from 3% to 6%, whereas the prevalence of CTS in developing countries like Pakistan has been reported to be from 10% to 15%.2
The management of mild to moderate CTS ranges from conservative management, including ultrasound therapy using the pulsed mode, wrist splinting, and tendon gliding exercises, to Neuro-mobilization.3 On the other hand, the management of moderate to severe CTS, which is unresponsive to the above-mentioned therapies comprises therapeutic steroid injections and surgical decompression of the median nerve. In many cases, surgical decompression is used as a last resort after the failure of therapeutic steroid injections. However, studies have shown that surgical decompression in these cases is associated with poor postoperative outcomes, including increased risk of pain and paresthesia.4 Furthermore, such cases are also associated with an increased risk of surgical site infections, non-infectious wound complications, and 1 year-reoperation. The risk of these complications is maximum when surgery is performed within 30 days of the last therapeutic steroid injection along with a high number of therapeutic steroid injections (infections 1.77%, non-infectious complications 1.12%, 1-year re-operation 2.09%), and is minimal when performed from 90 to 180 days of the last therapeutic steroid injection with a low number of therapeutic steroid injections (infections 1.19%, non-infectious complications 0.44%, 1-year re-operation 1.58%). Therefore, surgical decompression of the median nerve should be delayed for 90 to 180 days after the last therapeutic steroid injection, depending on the severity.5
There is a high prevalence of CTS in developing countries like Pakistan and therapeutic steroid injections are frequently prescribed as first-line treatment for moderate to severe CTS.
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Reinvestigation of environmental Kuznets curve with ecological footprints: Empirical analysis of economic growth and population density
No full textWhy did I buy this? Purchase regret and repeat purchase intentions: A model and empirical application
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