Frequency-Doubling of Femtosecond Pulses in “Thick” Nonlinear Crystals With Different Temporal and Spatial Walk-Off Parameters

We present a comparative study on frequency-doubling characteristics of femtosecond laser pulses in thick nonlinear crystals with different temporal and spatial walk-off parameters. Using single-pass second harmonic generation (SHG) of 260 fs pulses at 1064 nm from a high-average-power femtosecond Yb-fiber laser in 5-mm-long crystals of β-BaB2O4 (BBO) and BiB3O6 (BIBO), we find that for comparable values of temporal and spatial walk-off parameters in each crystal, the optimum focusing condition for SHG is more strongly influenced by spatial walk-off than temporal walk-off. It is also observed that under such conditions, the Boyd and Kleinman theory commonly used to define the optimum focusing condition for frequency-doubling of cw and long-pulse lasers is also valid for SHG of ultrafast lasers. We also investigate the effect of focusing on the spectral, temporal, and spatial characteristics of the second harmonic (SH) radiation, as well as angular acceptance bandwidth for the SHG process, under different temporal and spatial walk-off conditions in the two crystalsPeer ReviewedPostprint (author's final draft

Vitamins

This chapter is going to explain a part of the nutrients the human body needs. They are organic compounds called vitamins. Those compounds will be clarified, as well as their benefits, deficiencies, chemical structure, and why the body needs them crucially. Vitamins is an exceptionally vital recognized name required in certain amounts in the body, some of them exist as a complicated natural compounds found in herbal meals. It plays a key function in regular metabolism, the absence of which in the diet causes deficiency and several diseases. Vitamins are differentiated from the trace elements, also found in the weight-reduction plan in small quantities for health, growth, replica, and other crucial metabolism

Antioxidant activity of Linalool

In recent years, Essential oils from their various aromatic plants hadbeen reported to be used in treating of many types of cancer due to their antitumoractivity. In addition, numerous studies had investigated the highest capability ofchemopreventive phytochemicals compound to act as anticancer drugs. In thepresent research, the antioxidant activity of Linalool on free radicals compoundswas studied. The Antioxidant activity was performed using two methods, DPPHand Hydrogen Peroxide (H2O2) Scavenging Capacity. The DPPH scavengingactivity demonstrated that Linalool had antioxidant activity comparing withascorbic acid. Linalool demonstrated moderate antioxidant activity with50.57471% compared with ascorbic acid that showed 86%. Meanwhile, H2O2scavenging capacity methods investigated that Linalool exhibited moderatescavenging activity 56.36% comparing with ascorbic acid that showed 65%. Theresults of this study investigated that the Linalool can be used as easily accessiblesource of natural antioxidants. It can able to be used in the treating several typesof cancers as a result of antioxidant activity of it

Toxicity of Porous Silicon Nanoparticles on Liver of Mice

Nanoparticles are a special group of materials with unique features and extensive application in diverse fields. The present work demonstrates the toxicity impact of porous silicon nanoparticles (PSNPs) on kidney parameter which is prepared by electrochemical etching method. the synthesis of porous silicon nanoparticles are conformed by using structural and optical properties from through scanning electron microscope and atomic force microscopy techniques. The effect of toxicity of these nanoparticles on the liver parameters in laboratory animals use four groups each groups involve three duplicities was studied. Injected of porous silicon nanoparticles in the intraperitoneal at concentration of 1mg/kg. The results of biochemical assay Aspartate Amino-Transferase (GOT), Alanine Amino-Transferase (GPT), Alkaline Phosphatase (ALP) were compared with the control groups, for four weeks and then confirm a result was made with Histological study for section of liver. Results show no significant differences in levels (GOT, GPT, ALT) among the test groups via comparison with controls groups. This Result indicates no toxic effect of porous silicon nanoparticles' on kidney parameters

Caspase-1 cleavage of the TLR adaptor TRIF inhibits autophagy and β-interferon production during pseudomonas aeruginosa infection

Bacterial infection can trigger autophagy and inflammasome activation, but the effects of inflammasome activation on autophagy are unknown. We examined this in the context of Pseudomonas aeruginosa macrophage infection, which triggers NLRC4 inflammasome activation. P. aeruginosa induced autophagy via TLR4 and its adaptor TRIF. NLRC4 and caspase-1 activation following infection attenuated autophagy. Caspase-1 directly cleaved TRIF to diminish TRIF-mediated signaling, resulting in inhibition of autophagy and in reduced type I interferon production. Expression of a caspase-1 resistant TRIF mutant enhanced autophagy and type I interferon production following infection. Preventing TRIF cleavage by caspase-1 in an in vivo model of P. aeruginosa infection resulted in enhanced bacterial autophagy, attenuated IL-1β production, and increased bacterial clearance. Additionally, TRIF cleavage by caspase-1 diminished NLRP3 inflammasome activation. Thus, caspase-1 mediated TRIF cleavage is a key event in controlling autophagy, type I interferon production, and inflammasome activation with important functional consequences

Mitochondrial damage contributes to Pseudomonas aeruginosa activation of the inflammasome and is downregulated by autophagy.

The nucleotide-binding domain, leucine-rich repeat containing family caspase recruitment domain containing 4 (NLRC4) inflammasome can be activated by pathogenic bacteria via products translocated through the microbial type III secretion apparatus (T3SS). Recent work has shown that activation of the NLRP3 inflammasome is downregulated by autophagy, but the influence of autophagy on NLRC4 activation is unclear. We set out to determine how autophagy might influence this process, using the bacterium Pseudomonas aeruginosa, which activates the NLRC4 inflammasome via its T3SS. Infection resulted in T3SS-dependent mitochondrial damage with increased production of reactive oxygen intermediates and release of mitochondrial DNA. Inhibiting mitochondrial reactive oxygen release or degrading intracellular mitochondrial DNA abrogated NLRC4 inflammasome activation. Moreover, macrophages lacking mitochondria failed to activate NLRC4 following infection. Removal of damaged mitochondria by autophagy significantly attenuated NLRC4 inflammasome activation. Mitochondrial DNA bound specifically to NLRC4 immunoprecipitates and transfection of mitochondrial DNA directly activated the NLRC4 inflammasome; oxidation of the DNA enhanced this effect. Manipulation of autophagy altered the degree of inflammasome activation and inflammation in an in vivo model of P. aeruginosa infection. Our results reveal a novel mechanism contributing to NLRC4 activation by P. aeruginosa via mitochondrial damage and release of mitochondrial DNA triggered by the bacterial T3SS that is downregulated by autophagy

Biochemical Changes in Renal Function and Plasma Protein Profile of Petrol Station Attendants in Basrah

The current study is aimed to evaluate the possible biochemical variation in renal functions and proteins of plasma due to exposure of petrol vapor. Thirty-six station attendant assessed in Basrah, Iraq. A corresponding (20), healthy persons were used as controls group. The results of our study have been shown a significant increase in the level of blood urea, blood creatinine and in the level of plasma protein for those workers from (6-10) years, when compared the results with the control group. The results refer to that exposure to petroleum products is cause imbalance in renal function. These results, from our study, may be directly related to the time of exposure

Non-technical skills for urological surgeons (NoTSUS) : development and evaluation of curriculum and assessment scale

In the last decade non-technical skills (NTS) have emerged as a vital area for improvement within surgery. This study aims to develop and evaluate a Non-technical Skills for Urological Surgeons (NoTSUS) training curriculum and assessment scale. This international, longitudinal and observational study began with a 3-round Delphi methodology to refine curriculum contents and rating scale. Sessions with up to four participants were delivered where each candidate undertook an independent scenario within the validated full immersion simulation environment. Candidates were assessed using both the NoTSS (Non-technical Skills for Surgeons) and NoTSUS rating scales by NTS-trained and non-trained experts. A post-training evaluation survey was distributed. 62 participants comprising trainees (n = 43) and specialists (n = 19) undertook the NoTSUS course. The NoTSS and NoTSUS scales correlated well, with a mean difference of 3.3 in the overall total (p = 0.10, r = 0.53). However, there was significant differences in scores between the NoTSS-trained and non-trained raters (n = 28, p = 0.03). A one-way ANOVA test revealed significant improvement throughout the four simulation scenarios in each session (p = 0.02). The NoTSUS curriculum received positive feedback from participants and demonstrated educational value and acceptability. The NoTSUS curriculum has demonstrated high educational value for NTS training aimed at urologists, with marked improvement throughout sessions. Correlation of NoTSUS and NoTSS scales proves its suitability for evaluating NTS in future training. Demonstration of inter-rater reliability indicates that the scale is reliable for use in assessment by expert faculty members. Furthermore, qualitative feedback from participants suggests gain of transferrable skills over the course. The online version of this article (10.1007/s00345-020-03406-6) contains supplementary material, which is available to authorized users

TNF-α Loaded on Gold Nanoparticles as a Good Therapeutic Agent against Breast Cancer AMJ13 Cells

Although the remarkable anti tumor effect of tumor necrosis factor (TNF-α) and the essential role in diverse cellular and immunological properties have been evidenced, the clinical use of TNF-α is hindered due to its toxicity. Our study was aimed to develop a new drug delivery system by binding pygelated gold nanoparticles (50 nm) with TNF-α and then investigate the anticancer activity against AMJ13 cell line. The binding of these compounds were confirmed and characterized using ultraviolet-visible spectroscopy (UV-Vis), scanning electrone microscope (SEM), and transmision electrone microscope (TEM). Varios parameters in vitro were used to examine the anticancer activity of each compound against AMJ13 cell line. Gold nanoparticles (GNPs) and TNFα-GNPs were found to exert cell growth arrest against the cancer cell line. The anti-proliferative effect of these compounds was due to cell death and inducing apoptosis as confirmed by using 4', 6-Diamidino-2-phenylindole (DAPI) fluorescent assay, flow cytometry assay, and finally mitochondrial membrane potential (MMP) staining, Real-time polymerase chanin reaction (RT-PCR) was used to detect changes in the expression of p53 protein. In addition, we studied the effect of drug delivery system on body weight on mice. In conclusion, the results of this study demonstrated that the TNFα-GNPs inhibited AMJ13 cells proliferation, resulting in apoptosis during novel pathway that involved mitochondrial damage and up-reglulated p53. Taken together, the results suggested that the TNFα loaded GNPs could be a promising therapy protocol for cancer cells and could be used for wide medical applications and offer new drug recompensing a chemotherapy drug

Effect of TNF-Gold Nanoparticles Combination on Kidney and Liver Parameters of Female Mice

Background: Nanomedicine has emerged as a powerful platform for applying nanotechnology in the prevention and treating many diseases. Objective: To investigate the toxicity of designated anti-cancer drugs composed of gold nanoparticles (GNPs), tumor necrosis factor-alpha (TNF-α), and cysteine-Alanine-Leucine-Asparagine-Asparagine (CALNN) peptide on kidney and liver parameters, using animals’ model. Methods: A Combination of TNF-α and CALNN peptide on the surface of GNPs were achieved depending on formation of dative covalent bond between molecules and pH of solutions, which leads to react with active groups of different molecules of nanoparticles, which characterized using ultraviolet visible spectroscopy. Moreover, their effects on kidney and liver blood variables had been examined. These blood values included measurement of the glutamic oxaloacetic transaminase, glutamic pyruvic transaminase and alkaline phosphatase, creatinine, and urea levels after intraperitoneal injection of an anti-cancer drug in female albino mice. Results: Overall, the results indicated that there was no significant change in the concentration of different biochemical values between treated and control groups. Conclusion: The results suggest that GNPs-TNF-α-CALNN combination have no harmful impact on kidney and liver organs of tested mice. Keywords: Nanomedicine, GNPs, TNF-α, CALNN peptide, drug delivery, cytotoxicity Citation: Abood NA, Kadhim HS, Jabir MS. Effect of TNF-gold nanoparticles combination on kidney and liver parameters of female mice. Iraqi JMS. 2022; 20(2): 245-251. doi: 10.22578/IJMS.20.2.1