Decolorization of Reactive Black 5 Dye by Heterogeneous Photocatalysis with TiO 2 /UV / Decoloración del tinte Negro Remazol B mediante fotocatálisis heterogénea con TiO 2 /UV / Descoloração do corante sintético Negro Remazol B por fotocatálise heterogênea com TiO 2 /UV

Abstract Reactive Black 5 (RB5) is an azo dye widely used in the textile industry because of its high chemical stability. Since it does not entirely fix on the fabrics, it pollutes water sources. In this work, the decolorization of aqueous solutions with RB5 was performed by heterogeneous photocatalysis with TiO2/UV. The reaction was carried out in an aluminum photoreactor equipped with five lamps. The effect of TiO2 (0.1, 0.175, and 0.25 g L-1), RB5 concentration (50, 75, and 100 mg L-1), and pH (3, 7, and 11) was evaluated for 14 h, using a Box-Behnken experimental statistical design. Complete decolorization of RB5 was obtained at 14 h, employing 0.175 g L-1 TiO2, 50 mg L-1 RB5, and pH 3. A 98.44% of decolorization was achieved in 10 h (0.25 g L-1 of TiO2, 50 mg L-1 of RB5, and pH 7). The highest decolorization percentage of RB5 (99.51%) was obtained at 10 h of exposure to UV light, using 0.5 g L-1 of TiO2, 50 mg L-1 of the dye, and a pH of 3. Cytotoxicity tests on the HepG2 cell line indicated that photocatalytic degradation of RB5 did not generate cytotoxic byproducts.

Resumen El Negro Remazol B (NRB) es un colorante azoico, usado en la industria textil por su estabilidad química. Este tinte no se fija al 100%, ocasionando contaminación en el agua. En este trabajo se evaluó la decoloración de soluciones acuosas con NRB mediante fotocatálisis heterogénea con TiO2/UV. La reacción se realizó en un fotorreactor de aluminio equipado con cinco lámparas. El efecto de la concentración de TiO2 (0,1; 0,175 y 0,25 g L-1), y NRB (50, 75 y 100 mg L-1) y el pH (3, 7 y 11) fue evaluado durante 14 h, tomando un diseño estadístico experimental Box-Behnken. La decoloración completa del NRB se obtuvo después de 14 h (0,175 g L-1 de TiO2, 50 mg L-1 de NRB, y pH 3). Se alcanzó un 98,44% de decoloración después de 10 h (0,25 g L-1 de TiO2, 50 mg L-1 de NRB, y pH 7). Se encontró que el mejor porcentaje de decoloración del NRB (99,51%) se obtuvo a las 10 h de exposición a luz UV, utilizando 0,5 g L-1 de TiO2, 50 mg L-1 del colorante y un pH de 3. Los ensayos de citotoxicidad sobre la línea celular HepG2 indicaron que la degradación fotocatalítica del NRB no generó subproductos citotóxicos.

Resumo O Negro Remazol B (RNB) é um corante azoico usado na indústria têxtil pela sua estabilidade química. O corante não é fixo no tecido em 100%, então contamina as fontes de água. Neste trabalho, avaliou-se a descoloração de soluções aquosas com RNB por meio de fotocatálise heterogênea com TiO2/UV. A reação foi feita no fotoreactor de alumínio com cinco lâmpadas. O efeito da concentração de TiO2 (0,1; 0,175 e 0,25 g L-1), RNB (50, 75 e 100 mg L-1) e pH (3, 7 e 11) foi avaliado durante 14 h utilizando o modelo estatístico Box-Behnken. Ás 14 h, foi atingida a descoloração completa do RNB (pH 3; 0,175 g L-1 de TiO2 e 50 mg L-1 de RNB). Utilizando 0,25 g L-1 de TiO2, 50 mg L-1 de RNB e pH 7, obteve-se descoloração de 98,44% em 10 h. Encontrou-se que a melhor porcentagem de descoloração do RNB (91,51%) foi obtida com 10 h de exposição à luz UV usando 0,5 g L-1 de TiO2, 50 mg L-1 do corante e pH de 3. Adicionalmente, os testes de citotoxicidade na linha celular HepG2 mostraram que a degradação fotocatalítica do RNB não gerou subprodutos citotóxicos.

The role of multifunctional nucleoprotein P54nrb/NonO in tumor / 中国肿瘤生物治疗杂志

@#[摘 要] P54nrb/NonO是一种能够行使多种生物学功能的核蛋白，在人体多种组织和细胞系中广泛表达并具有高度的种间保守 性，与多种疾病的发生、发展密切相关。近年来， P54nrb/NonO在多种肿瘤中的作用报道逐渐增多，然而其具体的肿瘤生物学作用 和分子机制尚不明确。P54nrb/NonO在乳腺癌、前列腺癌、结直肠癌、黑色素瘤、鼻咽癌、肺癌、血液系统肿瘤等多种肿瘤中发挥重 要作用。

Research on the effectiveness between high flow nasal oxygen cannula and non-rebreather oxygen face mask in post-extubation patients / 中华急诊医学杂志

Objective To compare the clinical effects of high flow nasal cannula (HFNC) and non-rebreathing oxygen face mask (NRB) in post-extubation patients.Methods 88 critically ill patients with machinery ventilations were divided into HFNC group and NRB group randomly.Blood gas analysis and hemodynamic parameters were assessed 1 hour prior to extubation and 6 hours after extubation.The primary clinical outcomes measured were ventilation-free days,re-intubation patient numbers,length of stay in ICU (Intensive Care Unite),total duration of hospitalization and mortality.The scant of breath degree and comfortableness of patient were recorded according to the Visual analogue scale.The measurement data were described by mean ± standard deviation ((x) ± s) and analyzed with t test,enumeration data were described by number of cases and composition ratio and analyzed with X2test,P ＜ 0.05 was considered to have statistical difference.Results There was no significant difference in clinical features between the two groups,The oxygenation index of HFNC group is significantly higher than that of NRB group after extubation [(251.4 ±43.9) vs.(201.7 ±60.7),P =0.037)].There were more ventilator-free days in the HFNC group than NRB group [(4.2 ± 2.1) vs.(3.4 ± 2.8),P =0.037)] and fewer patients required reintubation (P =0.028).The rate of ventilator associated pneumonia is also lower than NRB group (P =0.024).The patients' scant of breath feeling were obviously allevated comparing with the NRB group [(2.9 ± 1.1) vs.(3.7 ± 1.8),P =0.042)].The oxygenation index of NRB group significantly decreased after extubation [(242.9 ±68.4vs.201.7 ±60.7 P =0.048)].The two groups demonstrated similar hemodynamic patterns before and after extubation.And there were no statistically significant clinical differences in PaCO2,length of ICU stay,total duration of hospitalization or mortality.Conclusions Compared with NRB,HFNC is a more safe and effective clinical tool in the prevention and treatment of critical adult patients with extubation failure.

Effect of p54nrb gene silencing on the endothelial cells migration of human umbilical vein and the angiogenesis in vitro / 解放军医学杂志

Objective To explore the effects of p54nrb gene silencing on the proliferation, migration of human umbilical vein endothelial cell (HUVEC) and angiogenesis in vitro. Methods HUVECs were infected by p54nrb-specific shRNA-containing lentiviruses for 24h, then the cells were cultured in media containing puromycin until stable establishment of p54nrb-silencing HUVEC cell line. The efficiency of p54nrb gene silencing technique was determined by Western blotting, and the effects of this technique on the proliferation of HUVECs was assessed by the Cell Counting Kit-8 (CCK-8) assay. The migration of p54nrbsilencing HUVECs was measured by wound healing assay and Transwell motility assay. Vessel formation assay was used to detect the angiogenesis ability of p54nrb-silencing HUVECs. Results Western blotting showed that the expression of p54nrb protein in p54nrb-silencing HUVECs decreased significantly, implying a stable establishment of p54nrb-silencing HUVEC cell line. The CCK-8 assay revealed that knockdown of p54nrb gene promoted the proliferation of HUVECs slightly. Wound healing assay and Transwell motility assay displayed that knockdown of p54nrb significantly inhibited the motility of HUVECs. Vessel formation assay showed that knockdown of p54nrb inhibited in vitro the formation of vessel-like structures of HUVEC cells. Conclusion p54nrb significantly promote the migration and angiogenesis in vitro of HUVECs, and may be an important modulin involved in angiogenesis.

Impacts of Tetrakis-hydroxymethyl Phosphonium Sulfate (THPS) Based Biocides on the Functional Group Activities of Some Oil Field Microorganisms Associated with Corrosion and Souring.

Aim: To determine the biocidal efficacy of THPS based biocides currently used in oil fields to control souring and corrosion. Methodology: By direct monitoring of inhibition of cell growth and inhibition of microbial functional group activities such as the ability to reduce sulfate and generate sulfide by sulfate reducing bacteria (SRB), reduce nitrate to nitrite by heterotrophic nitrate reducing bacteria (hNRB) and oxidation of sulfide and reduction of nitrate by sulfide oxidizing, nitrate reducing bacteria( so-NRB) using CSB-K medium. Results: We observed that higher doses of THPS (>400 ppm) was required to considerably inhibit the ability of SRB to reduce sulfate and generate hydrogen sulfide. It was also observed that the activities of SRB were more affected by the THPS biocides than those of hNRB and so-NRB. Conclusion: We conclude that SRB may have developed low level microbial resistance to THPS based biocides as higher doses are required to inhibit their activities. It is therefore recommended that THPS should be used in combination with other biocides or metabolic inhibitors for it to be effective at lower concentrations.

Impacts of Some Non-oxidizing Biocides on the Functional Group Activities of Some Problem Causing Microorganisms in Oil Production Facilities.

Aim: To determine the impacts of some non-oxidizing biocides such as glutaradehyde, sodium azide, isothiazolone on the functional group activities of some oil field microorganisms Methodology: Samples of non-oxidizing biocides were obtained from Microcheck and the inhibition of some functional group activities in produced and injection water samples were determined using CSB-K medium. Results: Glutaradehyde and sodium azide exhibited relatively high level inhibition while isothiazolones exhibited low level inhibition. Glutaradehyde further demonstrated a positive selective inhibitory activity. While SRB activities were inhibited by over 78%, that of hNRB and so-NRB were affected by less than 38%. Conclusion: Glutaradehyde can be developed to an efficient biocide with a positive selective action and can work in synergy with beneficial microbes to eliminate the problem causing ones.