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Purnama, Marselia; Purnama, Octavianti

doi:10.31253/aktek.v12i2.497

Cited by 2 publications

(2 citation statements)

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“…The cytotoxic test of the hydrogel samples was carried out using the Presto Blue test, as was done in the previous study. 26 Cell viability was then measured using the Presto Blue reagent obtained from Thermofisher A13262. The reagent can evaluate various cells based on the resazurin compound.…”

Section: 4mentioning

confidence: 99%

Composite Hydrogel of Poly(vinyl alcohol) Loaded by Citrus hystrix Leaf Extract, Chitosan, and Sodium Alginate with In Vitro Antibacterial and Release Test

Kusjuriansah,

Rodhiyah,

Syifa

et al. 2024

ACS Omega

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Citrus hystrix leaves have been used traditionally as a spice, a traditional medicine for respiratory and digestive disorders, and a remedy for bacterial infections. This study reports on the synthesis of composite hydrogels using the freeze−thaw method with poly(vinyl alcohol) (PVA) as the building block loaded by C. hystrix leaf extract (CHLE). Additionally, chitosan (CS) and sodium alginate (SA) were also loaded, respectively, to increase the antibacterial activity and to control the extract release of the composite hydrogels. The combinations of the compositions were PVA, PVA/CHLE, PVA/CHLE/CS, PVA/CHLE/SA, and PVA/ CHLE/SA/CS. The internal morphology of the hydrogels shows some changes after the PVA/CHLE hydrogel was loaded by CS, SA, and SA/CS. The analysis of the Fourier transform infrared (FTIR) spectra confirmed the presence of PVA, CHLE, CS, and SA in the composite hydrogels. From the X-ray diffraction (XRD) characterization, it was shown that the composite hydrogels maintained their semicrystalline properties with decreasing crystallinity degree after being loaded by CS, SA, and SA/CS, as also supported by differential scanning calorimetry (DSC) characterization. The compressive strength of the PVA/CHLE hydrogel decreases after the loading of CS, SA, and SA/CS, so that it becomes more elastic. Despite being loaded in the composite hydrogels, the CHLE retained its antibacterial activity, as evidenced in the in vitro antibacterial test. The loading of CS succeeded in increasing the antibacterial activity of the composite hydrogels, while the loading of SA resulted in the decrease of the antibacterial activity. The release of extract from the composite hydrogels was successfully slowed down after the loading of CS, SA, and SA/CS, resulting in a controlled release following the pseudo-Fickian diffusion. The cytotoxic activity test proved that all hydrogel samples can be used safely on normal cells up to concentrations above 1000 μg/mL.

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Section: 4mentioning

confidence: 99%

Composite Hydrogel of Poly(vinyl alcohol) Loaded by Citrus hystrix Leaf Extract, Chitosan, and Sodium Alginate with In Vitro Antibacterial and Release Test

Kusjuriansah,

Rodhiyah,

Syifa

et al. 2024

ACS Omega

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“…Previous studies have examined the effect of motivation on employees' OCB in various contexts, either directly (Ibrahim & Aslinda, 2015) or through mediating role of organizational commitment (Noor, 2009;Kim et al, 2020). Both psychological empowerment (Saleh et al, 2020;Hepkema, 2011) and affective organizational commitment (Purnama, 2013;Farzaneh et al, 2014) Taken together, although not all job demands are negative, excessive levels of job demands require high effort to meet them and thereby elicit negative responses, which, in turn, negatively affect organizational performances (Schaufeli & Bakker, 2004). Furthermore, a lack of resources impedes job demand and the achieving of work goals which evokes withdrawal behavior or reduced motivation/disengagement to prevent further energy depletion (Schaufeli & Taris, 2014).…”

mentioning

confidence: 99%

The Empirical Research on Professional Isolation During Remote Work in Context of COVID-19 and Organizational Citizenship Behavior:

Noh¹,

Lee

2022

Korean J. Ind. Organ. Psychol.

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While much has been studied about the positive and negative effects of discretionary remote work as an alternative work arrangement, little has been written about in the context of mandated remote work. The COVID-19 pandemic forced many organizations to impose remote work as a new mode of working arrangements. This abrupt change yielded positive and negative physical, social, and psychological outcomes. Drawing from the job demand and resource model and self-determination theory, this study examines the effects of professional isolation on organizational citizenship behavior, proposing the sequential mediation of psychological empowerment and affective organizational commitment as intrinsic motivators. An online survey was conducted. A total of 162 full-time remote workers (56 male (34.6%), 106 female (65.4%)) in Korea were analyzed. This study revealed that psychological empowerment and affective commitment fully mediate the relationship between professional isolation and organizational citizenship behavior. Contrary to expectation, however, the relationship between professional isolation and organization was found to be nonsignificant. Implications for practice, theory, and future research are discussed.

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Cited by 2 publications

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Composite Hydrogel of Poly(vinyl alcohol) Loaded by Citrus hystrix Leaf Extract, Chitosan, and Sodium Alginate with In Vitro Antibacterial and Release Test

Composite Hydrogel of Poly(vinyl alcohol) Loaded by Citrus hystrix Leaf Extract, Chitosan, and Sodium Alginate with In Vitro Antibacterial and Release Test

The Empirical Research on Professional Isolation During Remote Work in Context of COVID-19 and Organizational Citizenship Behavior:

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