The photoinduced synthesis of zinc oxide nanoparticles (ZnO NPs) was carried out to unveil the effects of change in wavelength of photons. ZnO NPs were synthesized by the coprecipitation technique exposed to different light regimes [dark environment, daylight, and blue-, green-, yellow-, and red-colored light-emitting diodes (LEDs)] at room temperature. X-ray diffractogram (XRD) revealed the wurtzite structure of ZnO NPs. A small change in the size of ZnO NPs (17.11–22.56 nm) was observed with the variation in wavelength of lights from 350 to 700 nm. Spherical to hexagonal disks and rodlike surface morphologies were observed by scanning electron microscopy (SEM). The elemental composition and surface chemistry of NPs were studied by energy-dispersive X-ray diffractive (EDX) and Fourier transform infrared (FTIR) spectra. Maximum free radical quenching activity, cation radical scavenging, and total antioxidant capacity were found in ZnO NPs synthesized under green light (28.78 ± 0.18, 30.05 ± 0.21%, and 36.55 ± 2.63 μg AAE/mg, respectively). Daylight-synthesized NPs (DL-ZNPs) showed the greatest total reducing potential (15.81 ± 0.33 μg AAE/mg) and metal-chelating activity (37.77 ± 0.31%). Photoinduced ZnO NPs showed significant enzyme inhibitory effects on amylase, lipase, and urease by red-light NPs (87.49 ± 0.19%), green-light NPs (91.44 ± 0.29%), and blue-light NPs (92.17 ± 0.34%), respectively. Photoinduced ZnO NPs have been employed as nanozymes and found to exhibit intrinsic peroxidase-like activity as well. Blue-light-synthesized ZnO NPs displayed the strongest antibacterial activity (23 mm) against methicillin-resistant Staphylococcus aureus (MRSA). This study can be considered as a novel step toward the synthetic approach using LEDs to synthesize ZnO NPs with specific physicochemical properties and extends a great prospect in the environmental chemistry, food safety, and biomedical fields as nanozyme, antioxidant, antibacterial, anti-α-amylase, antiurease, and antilipase agents.

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Introduction: One of the major public health concerns across the world is the fractures occurring at the distal end of radius with an incidence rate of 25.4 per 10000 elderly people who are of about 65 years of age. These fractures are the most common fractures occurring in the upper extremities of elderly patients. More than 210 million dollars are regularly spent on the management of radial fractures of the distal ends which are expected to increase every year, however, the process of managing radial distal fractures is still controversial. Aim: To compare the outcomes of surgical and non-surgical management of distal radial fractures in elderly patients. Methodology: The current study involved 90 patients who were more than 65 years of age and were treated either surgically or non-surgically. Patients who were treated non-surgically were treated with cast immobilization whereas patients who underwent surgery had either plate or external fixation. Functional scores and baseline radiographs were recorded before treatment, and follow-up was conducted at 2, 6, 12, 24, and 52 weeks. Radiographic and clinical follow-ups were observed along functional scores were calculated and observed. Results: Patients who were treated without surgery had a mean age of 76 years, whereas 44 patients who were treated with surgery had a mean age of 73 years. No significant differences were observed between the groups in terms of other demographic factors. No differences in the functional status were observed in terms of arms, hands, and shoulders whereas pain scores also exhibited no significant differences. Conclusion: It is suggested that minor limitations exist between wrist motion range and grip strength which was diminished with the non-operative care, but functional recovery was not limited during 12 months follow-up.