Field strength scaling in quasi-phase-matching of high-order harmonic generation by low-intensity assisting fields

Balogh, Emeric,Varjú,, Katalin The Optical Society 2016 Journal of the Optical Society of America B Vol.33 No.2

<P>High-order harmonic generation in gas targets is a widespread scheme used to produce extreme ultraviolet radiation; however, it has a limited microscopic efficiency. Macroscopic enhancement of the produced radiation relies on phase-matching, often only achievable in quasi-phase-matching arrangements. In the present work we numerically study quasi-phase-matching induced by low-intensity assisting fields. We investigate the required assisting field strength dependence on the wavelength and intensity of the driving field, harmonic order, trajectory class, and period of the assisting field. We comment on the optimal spatial beam profile of the assisting field. (C) 2016 Optical Society of America</P>

Laparoscopic-Assisted Percutaneous Endoscopic Gastrostomy Reduces Major Complications in High-Risk Pediatric Patients

Balogh, Brigitta,Szucs, Daniel,Gavaller, Gabriella,Rieth, Anna,Kovacs, Tamas The Korean Society of Pediatric Gastroenterology 2021 Pediatric gastroenterology, hepatology & nutrition Vol.24 No.3

Purpose: Percutaneous endoscopic gastrostomy (PEG) is a safe method to feed patients with feeding difficulty. This study aimed to compare the outcomes of conventional PEG and laparoscopic-assisted PEG (L-PEG) placement in high-risk pediatric patients. Methods: In our tertiary pediatric department, 90 PEG insertions were performed between 2014 and 2019. Children with severe thoracoabdominal deformity (TAD), previous abdominal surgery, ventriculoperitoneal (VP) shunt, and abdominal tumors were considered as high-risk patients. Age, sex, diagnosis, operative time, complications, and mortality were compared among patients who underwent conventional PEG placement (first group) and those who underwent L-PEG placement (second group). Results: We analyzed the outcomes of conventional PEG placement (first group, n=15; patients with severe TAD [n=7], abdominal tumor [n=6], and VP shunts [n=2]) and L-PEG placement (second group, n=10; patients with VP shunts [n=5], previous abdominal surgery [n=4], and severe TAD [n=1]). Regarding minor complications, 1 (6.6%) patient in the first group underwent unplanned PEG removal and 1 (10%) patient in the second group had peristomal granuloma. We observed three major complications: colon perforation (6.6%) in a patient with VP shunt, gastrocolic fistula (6.6%) in a patient with Fallot-tetralogy and severe TAD, and pneumoperitoneum (6.6%) caused by early tube dislodgement in an autistic patient with severe TAD. All the three complications occurred in the first group (20%). No major complications occurred in the second group. Conclusion: In high-risk patients, L-PEG may be safer than conventional PEG. Thus, L-PEG is recommended for high-risk patients.

Isolation of attosecond pulses from the attosecond lighthouse

Hammond, TJ,Balogh, Emeric,Kim, Kyung Taec Institute of Physics Publishing Ltd. 2017 Journal of Physics B: Atomic, Molecular and Optica Vol.50 No.1

<P>This paper proposes and verifies methods to improve the isolation of the attosecond pulses generated via the attosecond lighthouse technique in gases. We find that the converging fundamental field can compensate for the inherent diverging wavefront of the attosecond pulses, but is only valid over a limited portion of the spectrum and sacrifices the maximum attainable photon energy. We discuss two methods of manipulating the fundamental field to control the divergence of the attosecond pulses: the first method uses a perturbing beam that manipulates the wavefront, and the second method controls the fundamental dispersion. These methods improve the isolation of the attosecond pulses up to the cutoff photon energy.</P>

고온에서 방사광을 이용한 (Fe, Mg)₂SiO₄-스피넬의 올리빈으로의 역상변이

김영호,Sean Shieh,L.C. Ming,J. Balogh 대한지질학회 1994 대한지질학회 학술대회 Vol.1994 No.

Role of Glutathione Redox System on the T-2 Toxin Tolerance of Pheasant (Phasianus colchicus)

Csaba Fernye,Zsolt Ancsin,Andrea Bocsai,Krisztian Balogh,Miklos Mezes,Marta Erdelyi 한국독성학회 2018 Toxicological Research Vol.34 No.3

The purpose of the present study was to evaluate the effects of different dietary concentrations of T-2 toxin on blood plasma protein content, lipid peroxidation and glutathione redox system of pheasant (Phasianus colchicus). A total of 320 one-day-old female pheasants were randomly assigned to four treatment groups fed with a diet contaminated with different concentrations of T-2 toxin (control, 4 ㎎/㎏, 8 ㎎/㎏ and 16 ㎎/㎏). Birds were sacrificed at early (12, 24 and 72 hr) and late (1, 2 and 3 weeks) stages of the experiment to demonstrate the effect of T-2 toxin on lipid peroxidation and glutathione redox status in different tissues. Feed refusal and impaired growth were observed with dose dependent manner. Lipid-peroxidation was not induced in the liver, while the glutathione redox system was activated partly in the liver, but primarily in the blood plasma. Glutathione peroxidase activity has changed parallel with reduced glutathione concentration in all tissues. Based on our results, pheasants seem to have higher tolerance to T-2 toxin than other avian species, and glutathione redox system might contribute in some extent to this higher tolerance, in particular against free-radical mediated oxidative damage of tissues, such as liver.

방사광과 다이아몬드 앤빌을 이용한 PBHfO3 와 흑연에 대한 고압 연구

김영호,박정미,고태경 ( L . C . Ming,J . Balogh ) 한국광물학회 1994 광물과 암석 (J.Miner.Soc.Korea) Vol.7 No.2

Characteristic Changes in Decidual Gene Expression Signature in Spontaneous Term Parturition

Haidy El-Azzamy,Nandor Gabor Than,Andrea Balogh,Roberto Romero,Yi Xu,Christopher LaJeunesse,Olesya Plazyo,Zhonghui Xu,Theodore G. Price,Zhong Dong,Adi L. Tarca,Zoltan Papp,Sonia S. Hassan,Tinnakorn Ch 대한병리학회 2017 Journal of Pathology and Translational Medicine Vol.51 No.3

Background: The decidua has been implicated in the “terminal pathway” of human term parturition, which is characterized by the activation of pro-inflammatory pathways in gestational tissues. However, the transcriptomic changes in the decidua leading to terminal pathway activation have not been systematically explored. This study aimed to compare the decidual expression of developmental signaling and inflammation-related genes before and after spontaneous term labor in order to reveal their involvement in this process. Methods: Chorioamniotic membranes were obtained from normal pregnant women who delivered at term with spontaneous labor (TIL, n = 14) or without labor (TNL, n = 15). Decidual cells were isolated from snap-frozen chorioamniotic membranes with laser microdissection. The expression of 46 genes involved in decidual development, sex steroid and prostaglandin signaling, as well as pro- and anti-inflammatory pathways, was analyzed using high-throughput quantitative real-time polymerase chain reaction (qRT-PCR). Chorioamniotic membrane sections were immunostained and then semi-quantified for five proteins, and immunoassays for three chemokines were performed on maternal plasma samples. Results: The genes with the highest expression in the decidua at term gestation included insulin-like growth factor-binding protein 1 (IGFBP1), galectin-1 (LGALS1), and progestogen-associated endometrial protein (PAEP); the expression of estrogen receptor 1 (ESR1), homeobox A11 (HOXA11), interleukin 1β (IL1B), IL8, progesterone receptor membrane component 2 (PGRMC2), and prostaglandin E synthase (PTGES) was higher in TIL than in TNL cases; the expression of chemokine C-C motif ligand 2 (CCL2), CCL5, LGALS1, LGALS3, and PAEP was lower in TIL than in TNL cases; immunostaining confirmed qRT-PCR data for IL-8, CCL2, galectin-1, galectin-3, and PAEP; and no correlations between the decidual gene expression and the maternal plasma protein concentrations of CCL2, CCL5, and IL-8 were found. Conclusions: Our data suggests that with the initiation of parturition, the decidual expression of anti-inflammatory mediators decreases, while the expression of pro-inflammatory mediators and steroid receptors increases. This shift may affect downstream signaling pathways that can lead to parturition.

Galectins: Double-edged Swords in the Cross-roads of Pregnancy Complications and Female Reproductive Tract Inflammation and Neoplasia

Nandor Gabor Than,Roberto Romero,Andrea Balogh,Eva Karpati,Salvatore Andrea Mastrolia,Orna Staretz-Chacham,Sinuhe Hahn,Offer Erez,Zoltan Papp,김종재 대한병리학회 2015 Journal of Pathology and Translational Medicine Vol.49 No.3

Galectins are an evolutionarily ancient and widely expressed family of lectins that have unique glycan-binding characteristics. They are pleiotropic regulators of key biological processes, such as cell growth, proliferation, differentiation, apoptosis, signal transduction, and pre-mRNA splicing, as well as homo- and heterotypic cell-cell and cell-extracellular matrix interactions. Galectins are also pivotal in immune responses since they regulate host-pathogen interactions, innate and adaptive immune responses, acute and chronic inflammation, and immune tolerance. Some galectins are also central to the regulation of angiogenesis, cell migration and invasion. Expression and functional data provide convincing evidence that, due to these functions, galectins play key roles in shared and unique pathways of normal embryonic and placental development as well as oncodevelopmental processes in tumorigenesis. Therefore, galectins may sometimes act as double-edged swords since they have beneficial but also harmful effects for the organism. Recent advances facilitate the use of galectins as biomarkers in obstetrical syndromes and in various malignancies, and their therapeutic applications are also under investigation. This review provides a general overview of galectins and a focused review of this lectin subfamily in the context of inflammation, infection and tumors of the female reproductive tract as well as in normal pregnancies and those complicated by the great obstetrical syndromes.

Role of Glutathione Redox System on the T-2 Toxin Tolerance of Pheasant (Phasianus colchicus)

Fernye, Csaba,Ancsin, Zsolt,Bocsai, Andrea,Balogh, Krisztian,Mezes, Miklos,Erdelyi, Marta Korean Society of ToxicologyKorea Environmental Mu 2018 Toxicological Research Vol.34 No.3

The purpose of the present study was to evaluate the effects of different dietary concentrations of T-2 toxin on blood plasma protein content, lipid peroxidation and glutathione redox system of pheasant (Phasianus colchicus). A total of 320 one-day-old female pheasants were randomly assigned to four treatment groups fed with a diet contaminated with different concentrations of T-2 toxin (control, 4 mg/kg, 8 mg/kg and 16 mg/kg). Birds were sacrificed at early (12, 24 and 72 hr) and late (1, 2 and 3 weeks) stages of the experiment to demonstrate the effect of T-2 toxin on lipid peroxidation and glutathione redox status in different tissues. Feed refusal and impaired growth were observed with dose dependent manner. Lipid-peroxidation was not induced in the liver, while the glutathione redox system was activated partly in the liver, but primarily in the blood plasma. Glutathione peroxidase activity has changed parallel with reduced glutathione concentration in all tissues. Based on our results, pheasants seem to have higher tolerance to T-2 toxin than other avian species, and glutathione redox system might contribute in some extent to this higher tolerance, in particular against free-radical mediated oxidative damage of tissues, such as liver.

Prospecting for Insect Pheromones in Indonesia: Finds, Failures and the Future

Angerilli, N.P.D.,Permana, A.D.,Sasaerila, Y.,Hallett, R.,Zilahi-Balogh, R.,Edmonds, R. Korean Society of Applied Entomology 1998 Journal of Asia-Pacific Entomology Vol.1 No.1

The isolation, identification and application of pheromones in agriculture and forestry in Indonesia is beginning and is of increasing importance in the official government strategy of pest management. As the fourth most populous country in the world, home to some of the largest remaining tropical rainforests and undergoing rapid industrualization, there are a variety of powerful reasons for Indonesia to continue to develop and implement IPM prograns that are effective, readily available and user-friendly. Many IPM programs will be benefited from the inclusion of a pheromone-based component. Several recent pheromone research projects, undertaken in Indonesia to identify and develop pheromones as tools in IPM programs, were examined. These include diamondback moth(Plutella xylostella(L.)); soybean pod borer(Etiella zinckenella Trietschke and E. hobsoni Butler); sugar cane top borer(Scirpophaga nivella F.); and some coleopteran and other pests of palm(Oryctes rhinoceros(L.), Rhynchophorus ferrugineus(Olivier), R. vulneratus(Panzer) and Setothosea asigna(vE)). The nature of the pheromone was discussed in each case and how the pheromone information can be of assistance in IPM programs involving these insect pests was reviewed. Some obstacles to pheromone research as well as some of the limitations to the inclusion the influence of difficulties in communication and access to information, bureaucracy and the acquisition of equipment and supplies are not uncommon. Further, communication of research results as well as the general level of capitalization of agricultural effort in addition to grower sociocultural factors can be problematic. However there are a large number of opportunities for productive pheromone research and we present an active 'hot' list of target insect/crop combinations which are likely to prove rewarding. Facilitation of a continuous indigenous research effort involv-ing pheromones is being achieved through the development and strengthening of a Pheromone and Semiochemical Research Group centered at the Bandung Institute of Technology.