This study examines the extent to which a Zernike-based optical correction can restore acuity in keratoconus as a function of disease severity and contrast level. Increasingly complete Zernike corrections in the presence of Zernike-fit error were simulated. Acuity for keratoconic eyes with <60 D maximum corneal power reached 20/13 with a fifth-order Zernike correction under high-contrast condit...

Background and objectives: Cisplatin (CP), the chemotherapy drug, is used for the treatment of many types of cancer but causes hepatotoxicity. Zataria multiflora Boiss. (ZM), is a widely used herbal medicine with potent antioxidant properties. This study aimed to assess the protective effect of Zataria multiflora against cisplatin-induced hepatotoxicity. <strong...

Background: Aspergillus flavus is a toxic contaminant in foods, which can induce mutagenic, teratogenic, and carcinogenic effects. In last decades, synthetic fungicides have been used for inhibition of fungal growth in plants. The public attention was also attracted to contamination of food chain by these chemicals. Therefore, in the current study, we decided to use Zataria multiflora (ZM) esse...

Aims: The biosynthesis of nanoparticles is widely considered today. The aim of this investigation was the biosynthesis and coating of Ag.NPs with Zataria multiflora (Zm-Ag.NPs) leaf extract and assess its apoptosis promoting effects. Methods: The Zm-Ag.NPs was characterized by UV-visible and FTIR spectroscopy, TEM, EDS, DLS and measurement of zeta-potential. Apoptosis induction effects of Zm-A...

In face recognition tasks, one kind of feature set is not adequate to generate superior results; thus, selection and combination of complementary features are crucial steps. In this paper, the fusion of two useful descriptors, i.e., the Zernike moments (ZMs) and the local binary pattern (LBP)/local ternary pattern (LTP), has been proposed. The ZM descriptor consists of good global image represe...

To investigate fluctuations in the wavefront aberrations of the eye and their relation to pulse and respiration frequencies we used a wavefront sensor to measure the dynamics of the Zernike aberrations up to the polynomial fourth radial order. Simultaneously, the subject's pulse rate was measured, from which the instantaneous heart rate was derived. We used an auto-regressive process to derive ...

The optical behaviour of the human eye is often characterized with the Zernike coefficients. Great number of measurements and statistical data are available for individuals and for various groups of people concerning the Zernike coefficients of their eyes. Although, these coefficients were obtained from measurements at discrete points and via computations using some discretization of the contin...

In this paper, a novel feature-based image watermarking scheme is proposed. Zernike moments which have invariance properties are adopted in the scheme. In the proposed scheme, feature points are first extracted from host image and several circular patches centered on these points are generated. The patches are used as carriers of watermark information because they can be regenerated to locate w...

The effect of inoculum size and medium volume on methionine production by Bacillus species EZ- 13 ZM-10 was studied. methionine-producing bacteria had already been isolated from within Anambra State University (now Chukwuemeka Odumegwu Ojukwu University), Uli campus State. They were purified identified as EZ-13 using cultural biochemical characteristics. Thereafter, they used to evaluated the i...

light is never being distributed homogeneously and it forms a gradient over biomass. the unidirectional nature of light gives rise to a vertical gradient of light intensity as a function of depth. the maximum depth of the light zone suitable for phytoplankton photosynthesis is designated as the euphotic depth. this study was designed to test the hypothesis of mixing depth of phytoplankton and i...