Are Malaysians Ready to Resume the New Norm? Findings From a Nationwide Study.

Objective: The study aimed to evaluate the knowledge, attitude, and practices toward the prevention of coronavirus disease 2019 (COVID-19) among the public in Malaysia. Methods: A cross-sectional study was conducted online among the general public in Malaysia from June 2020 to August 2020 between the second and third wave (Phase 3 of the Recovery Movement Control Order). Participants were conveniently recruited through multiple social media platforms to encourage nationwide participation. A patient-administered questionnaire was used to assess their knowledge, attitude, and practice toward the prevention of COVID-19. For descriptive analysis, percentage, mean, and standard deviation (SD) were used to report demographic characteristics and knowledge, attitude, and practice scores. For inferential analysis, t-test, ANOVA, Pearson's correlation, Spearman's correlation, Chi-square test, and Binary Logistic Regression was used to analyze the study variables' differentiation, association, and correlations. The confidence interval selected for this study was 95%. Results: A total of 420 respondents participated in this survey. The majority of the participants (n = 412, 98%) were aware of COVID-19. Most participants (60%) learned about the pandemic through social media. About half of the participants had poor knowledge (45.5%) and a negative attitude (43.3%). Participants residing in urban areas showed good preventive practices as compared to those residing in rural areas (P < 0.05). There was a significant association between participants' attitudes and preventive practices toward COVID-19, where the majority of the participants (57.4%) who showed negative attitudes were more likely to follow poor preventive practices. Conclusion: Despite having good knowledge, participants with a negative attitude toward COVID-19 were less likely to follow the preventive practices of COVID-19. People's mindset and willingness may play an important role to influence their practices. Thus, these are the vulnerable groups, and strategies should be made to change their mindset through proper counseling and education.

Transport of trans-activator of transcription (TAT) peptide in tumour tissue model: evaluation of factors affecting the transport of TAT evidenced by flow cytometry.

OBJECTIVES: Trans-activator of transcription (TAT), a cell penetrating peptide, has been explored to overcome resistance to penetration and transport inside the cell, therefore, suggested to be used as drug delivery vector into drug-resistant tumours. The generosity of this study was to evaluate modifiable factors (concentration, temperature, incubation time and spheroid age) on the penetration of TAT. METHODS: Multicellular tumour spheroids (MCTS) used as tumour tissue models to mimic some characteristics with in-vivo tumors. Cell monolayer and 3-, 5-, 7-day-old MCTS were incubated with TAT and effects of modifiable factors were determined quantitatively through flow cytometry, based on TAT-positive cell count (%) and mean fluorescence intensity. KEY FINDINGS: Enhancing TAT concentration (1, 5 and 25 µm), transport significantly increased (ANOVA, P < 0.0001) in cell monolayer and spheroids. However, rising temperature from 7 to 37°C (t, P > 0.05) and increasing incubation time; 20 min, 1 h and 3 h; (ANOVA, P > 0.05) were statistically non-significant. Moreover, TAT penetration declines as spheroids get older (ANOVA, P < 0.01). CONCLUSION: While exploiting MCTS as tumour tissue model, older spheroids could be preferred to target penetration-resistant cells and mimic the in-vivo microenvironment.

Natural drug physcion encapsulated zeolitic imidazolate framework, and their application as antimicrobial agent.

In this study, we have encapsulated natural physcion (PHY) drug loading into metal-organic frameworks MOFs, zeolitic imidazolate frameworks (ZIFs) through straight-forward nano-precipitation technique. The synthesized PHY@ZIF-8 indicated high drug loading encapsulation efficiency i.e. 88%, whereas, drug loading capacity was found to be 11.49%. The characterization of PHY loaded-ZIF 8 (PHY@ZIF-8) was carried out by powder x-ray diffraction (PXRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), and FT-IR methods. The release of PHY loaded in ZIF-8 was 88.72% at pH 5.0 which is approximately three time higher than its release in physiological system with pH 7.4 (27.61%). The remarkable stability of PHY@ZIF-8 NPs even after 25 days stem it as an effective and stable candidate. Furthermore, the antibacterial activity of pure PHY, ZIF-8 and PHY@ZIF-8 were investigated against gram negative strains and gram positive strain. The PHY@ZIF-8 showed maximum growth inhibition zones against all microorganism as compare to pure PHY. We hope that this model drug could have the potential ability for treatment of various infectious diseases.

Properties of Zinc Oxide Nanoparticles and Their Activity Against Microbes.

Zinc oxide is an essential ingredient of many enzymes, sun screens, and ointments for pain and itch relief. Its microcrystals are very efficient light absorbers in the UVA and UVB region of spectra due to wide bandgap. Impact of zinc oxide on biological functions depends on its morphology, particle size, exposure time, concentration, pH, and biocompatibility. They are more effective against microorganisms such as Bacillus subtilis, Bacillus megaterium, Staphylococcus aureus, Sarcina lutea, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumonia, Pseudomonas vulgaris, Candida albicans, and Aspergillus niger. Mechanism of action has been ascribed to the activation of zinc oxide nanoparticles by light, which penetrate the bacterial cell wall via diffusion. It has been confirmed from SEM and TEM images of the bacterial cells that zinc oxide nanoparticles disintegrate the cell membrane and accumulate in the cytoplasm where they interact with biomolecules causing cell apoptosis leading to cell death.

Biogenic Fabrication of Iron/Iron Oxide Nanoparticles and Their Application.

Enshrined in this review are the biogenic fabrication and applications of coated and uncoated iron and iron oxide nanoparticles. Depending on their magnetic properties, they have been used in the treatment of cancer, drug delivery system, MRI, and catalysis and removal of pesticides from potable water. The polymer-coated iron and iron oxide nanoparticles are made biocompatible, and their slow release makes them more effective and lasting. Their cytotoxicity against microbes under aerobic/anaerobic conditions has also been discussed. The magnetic moment of superparamagnetic iron oxide nanoparticles changes with their interaction with biomolecules as a consequence of which their size decreases. Their biological efficacy has been found to be dependent on the shape, size, and concentration of these nanoparticles.