Effect of Gamma Radiation on Dyeing of Cotton Fabric with Reactive Blue 13

2011 ◽  
Vol 15 (3) ◽  
pp. 107-114 ◽  
Author(s):  
Iram Batool ◽  
Ijaz Ahmad Bhatti ◽  
Shahid Adeel ◽  
Muhammad Abbas
Keyword(s):  
Gamma Radiation ◽  
Gamma Irradiation ◽  
Radiation Treatment ◽  
Reactive Dye ◽  
Iso Standard ◽  
Standard Methods ◽  
Colour Strength ◽  
Dyeing Parameters ◽  
Optimized Conditions ◽  
Temperature Time

The effect of gamma radiation on the dyeing of cotton with Reactive Blue 13 dye powder has been investigated. The cotton and dye powder are irradiated to absorb doses of 100, 200, 300, 400 and 500 Gy by using a Co-60 gamma irradiator. Dyeing is performed by using irradiated and un-irradiated cotton with irradiated and un-irradiated dye powder, in order to observe the effect of radiation treatment on the colour strength of the reactive dye on cotton. Different dyeing parameters such as temperature, time and p H are optimized using irradiated cotton and dye powder. The effect of gamma irradiation on the colour strength and Lab values has been observed through optimized conditions of dyeing. The colour strength and Lab values are obtained by spectra flash spectrophotometer (SF650). ISO standard methods are employed to study the effect of gamma radiation on the Colourfastness properties of fabric. It can be demonstrated that gamma irradiation not only improves the colour strength of the dye in irradiated cotton, but also enhances the Colourfastness properties.

scholarly journals Sustainable Dyeing of Microwave Treated Polyester Fabric using Disperse Yellow 211 Dye

2018 ◽  
Vol 62 (1) ◽  
Author(s):  
Shahid Adeel ◽  
Samreen Gul Khan ◽  
Sania Shahid ◽  
Muhammad Saeed ◽  
Shumaila Kiran ◽  
...  
Keyword(s):  
Microwave Treatment ◽  
Polyester Fabric ◽  
Disperse Dye ◽  
Color Strength ◽  
Iso Standard ◽  
Standard Methods ◽  
Dyeing Performance ◽  
Dyeing Parameters ◽  
Ultraviolet Treatment ◽  
Temperature Time

The aim of current work is to evaluate the dyeing performance of newly introduced disperse dye to improve its dyeing behavior onto polyester fabric using microwave radiation. Microwave heating has promisingly improved the disperse dyeing of polyester fabrics. Disperse Yellow 211 (DY 211) has been used to dye the polyester fabric under the influence of microwave treatment. Both the fabric and dye solution, were treated with the microwaves for 1- 6 min. Different dyeing parameters such as temperature, time, dispersant and dye bath volume were also optimized and ISO standard methods for colorfastness were employed to rate the influence of microwave and ultraviolet treatment on disperse dyeing. It is found that microwave treated polyester (RP, 6 min), has given good color strength and darker shades upon dyeing at 90°C for 40 min. in the presence of 2 g/100ml of dispersant using 70 mL of irradiated dye solution (RS, 6 min) of pH 8. Similarly using dye bath of pH 11, microwave treated polyester (RP, 6 min.) has given good color strength and darker shades upon dyeing at 70°C for 35 min.in the presence of 1 g/100ml of dispersant. using 50 mL of irradiated dye solution (RS). ISO standards for fastness to light, washing and rubbing revealed that good to excellent ratings have been obtained from different shades dyed at optimal condition. It is inferred that Microwave treatment has not only reduced the dyeing conditions but also improved the color characteristics of dyed polyester fabric.

THE EFFECT OF GAMMA STERILIZATION AND ITS EFFECT ON MICROSCOPIC STRUCTURE OF DEEP FROZEN DOG SKULL

2018 ◽  
pp. 37-40
Author(s):  
Phuong Thao Tien Nguyen ◽  
Anh Hung Tran ◽  
Van Tam Le ◽  
Huu Thao Phung ◽  
Phan Quynh Anh Nguyen
Keyword(s):  
Structural Change ◽  
Gamma Radiation ◽  
Gamma Irradiation ◽  
Key Words ◽  
Bone Matrix ◽  
Infected Tissue ◽  
Microscopic Structure ◽  
Bacteriological Examination ◽  
Microscopic Scale

Objective: To evaluate the effect of gamma sterilization and its effect on microscopic structure of deeply frozen dog skull. Subjects and methods: 50 pairs of dog skull fragments have the same size,which were taken symmetrically through the midline of the skull, were divided into two lots. Evident lot consisting of 50 pieces are just deeply frozen, not irradicated. Experimental lot which was composed of 50 pieces were deeply frozen and exposed to 25kGy of gamma radiation. Afterwards, to evaluate the effect of gamma sterilization and compare the alter of bone matrix between lot groups. Results: After gamma irradiation, all dog skull fragments were negative with bacteriological examination. In microscopic scale, no difference was found between the two lots and there was no structural change in the irradiated fragments of all dog skull. Conclusion: Gamma irradiation with 25 kGy: (i) It has the ability to kill bacteria completely in the type of bacteria commonly infected tissue. (ii) It does not alter the structure of dog skull in microstructures. Key words: dog skull, gamma, sterilize

Mass Treatment of Flooded Archival Materials by Gamma Radiation

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Matteo Montanari ◽  
Sara Pipponzi ◽  
Pietro Livi ◽  
Antonio Prodi
Keyword(s):  
Gamma Radiation ◽  
Gamma Irradiation ◽  
Culture Method ◽  
Test Species ◽  
Atp Assay ◽  
Recovery Processes ◽  
Mycelia Growth ◽  
Thermal Drying ◽  
Radiation Treatments ◽  
Main Components

Abstract This work describes mass recovery processes of flooded archival materials at industrial scale. The presence of fungi on paper represents a threat to the integrity of the document because they degrade cellulose, one of the main components of paper. Gamma radiation treatments are investigated as mass disinfection agents for their high penetrating power, speed of treatment, and absence of risk due to chemical residuals. We compared two different recovery processes: thermal drying followed by gamma irradiation and gamma irradiation followed by thermal drying. Both these processes were conducted simultaneously on naturally contaminated archival items and on paper specimens artificially contaminated with species test. Efficacy was assessed by culture method and ATP assay, right after the treatments and after four years of storage at room temperature. Coupling gamma irradiation with a drying step with dry heat at 55–60 °C reduces the fungal loads on natural items up to levels close to the detection limits, and the reduction is maintained after four years. On artificial specimens, spore germination is completely inhibited, mycelia growth is also highly affected, but the melanised test species appear to be more resistant. A synergistic effect between gamma irradiation, water content, and thermal drying is highlighted in this paper.

A Profoundly Touchy Approved Spectrofluorimetric Approach for Assurance of Ixabepilone as Anticancer Drug by Utilizing Its Quenching Impact on Acetoxymercuric Fluorescein Reagent

2021 ◽  
pp. 39-52
Author(s):  
Hesham Salem ◽  
Amany Abdelaziz ◽  
Aliaa Gamal ◽  
Ramy El Sabaa
Keyword(s):  
Human Plasma ◽  
Anticancer Drug ◽  
Fluorescence Intensity ◽  
Solution Concentration ◽  
Quenching Effect ◽  
Bulk Powder ◽  
Optimized Conditions ◽  
Temperature Time ◽  
Sulfur Containing ◽  
Satisfactory Recovery

A dependable, sensitive, basic and cheap spectrofluorimetric approach has been created for test of sulfur-containing drug; ixabepilone in bulk powder, vials and human plasma. The approach depends on the quenching effect of ixabepilone on the fluorescence intensity of acetoxymercuric fluorescene (AMF) reagent at λem of 530 nm and λex of 500 nm. Parameters which will control the reaction such as pH, AMF solution concentration, temperature, time and solvents were examined and optimized. According to the optimized conditions, the proposed approach was practiced over the concentration area of 20-100 ng mL-1 with adequate linearity (r = 0.9998). The developed approach was approved confirming to ICH rules in terms of accuracy, precision, linearity, LOD and LOQ. The proposed approach was practiced to analyze ixabepilone in Ixempra® vials with satisfactory recovery % of 99.89 and RSE% of 1.24. The results achieved were compared to those achieved by an already reported HPLC approach.

scholarly journals Effect of gamma irradiation on fatty acid composition of total lipids in rabbit skin

2014 ◽  
Vol 68 (3) ◽  
pp. 34-36
Author(s):  
S. Kostyuk ◽  
A. Busenko
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Gamma Radiation ◽  
Gamma Irradiation ◽  
Acid Composition ◽  
Total Lipids ◽  
Rabbit Skin

It is found that gamma radiation leads to a significant decrease in the skin of rabbits content of these fatty acids, as meristinіс, pantadekanovaya, palmitic, palmitoleic, linoleic, arachidonic, and at the end issledvany, ie 76 Tide day, the concentration of fatty acids increased, and meristinіс palmitoleic and close to the physiological norm.

scholarly journals Gamma radiation treatment activates glucomoringin synthesis in Moringa oleifera

2017 ◽  
Vol 27 (5) ◽  
pp. 569-575 ◽  
Author(s):  
Tsifhiwa Ramabulana ◽  
Risimati D. Mavunda ◽  
Paul A. Steenkamp ◽  
Lizelle A. Piater ◽  
Ian A. Dubery ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Moringa Oleifera ◽  
Radiation Treatment

scholarly journals Gamma Radiation-Induced Disruption of Cellular Junctions in HUVECs Is Mediated through Affecting MAPK/NF-κB Inflammatory Pathways

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
H. Wang ◽  
R. Chandra Segaran ◽  
L. Y. Chan ◽  
Aref A. M. Aladresi ◽  
A. Chinnathambi ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Cell Viability ◽  
Gamma Irradiation ◽  
Mapk Pathway ◽  
Umbilical Vein ◽  
Mitogen Activated Protein Kinase ◽  
Migration Ability ◽  
Protein Levels ◽  
Cellular Junctions ◽  
Radiation Induced

Ionizing radiation-induced cardiovascular diseases (CVDs) have been well documented. However, the mechanisms of CVD genesis are still not fully understood. In this study, human umbilical vein endothelial cells (HUVECs) were exposed to gamma irradiation at different doses ranging from 0.2 Gy to 5 Gy. Cell viability, migration ability, permeability, oxidative and nitrosative stresses, inflammation, and nuclear factor kappa-light-chain-enhancer of activated B cell (NF-κB) pathway activation were evaluated postirradiation. It was found that gamma irradiation at doses ranging from 0.5 Gy to 5 Gy inhibited the migration ability of HUVECs without any significant effects on cell viability at 6 h and 24 h postirradiation. The decreased transendothelial electrical resistance (TEER), increased permeability, and disruption of cellular junctions were observed in HUVECs after gamma irradiation accompanied by the lower levels of junction-related proteins such as ZO-1, occludin, vascular endothelial- (VE-) cadherin, and connexin 40. The enhanced oxidative and nitrosative stresses, e.g., ROS and NO2- levels and inflammatory cytokines IL-6 and TNF-α were demonstrated in HUVECs after gamma irradiation. Western blot results showed that protein levels of mitogen-activated protein kinase (MAPK) pathway molecules p38, p53, p21, and p27 increased after gamma irradiation, which further induced the activation of the NF-κB pathway. BAY 11-7085, an inhibitor of NF-κB activation, was demonstrated to partially block the effects of gamma radiation in HUVECs examined by TEER and FITC-dextran permeability assay. We therefore concluded that the gamma irradiation-induced disruption of cellular junctions in HUVECs was through the inflammatory MAPK/NF-κB signaling pathway.

scholarly journals RESÍDUOS DE 14C-PROCHLORAZ EM MANGAS IRRADIADAS

2001 ◽  
Vol 11 ◽  
Author(s):  
MARIA APARECIDA COSTA ◽  
VALDEMAR LUIZ TORNISIELO ◽  
JULIO MARCOS MELGES WALDER
Keyword(s):  
Gamma Radiation ◽  
Degradation Product ◽  
Radiation Treatment ◽  
Refrigerated Storage ◽  
Post Harvest ◽  
Brazilian Legislation ◽  
Low Levels

O objetivo deste trabalho foi avaliar os níveis residuais de Prochloraz aplicado em mangas, na pré e pós-colheita após o tratamento com radiação. Os frutos foram submetidos à radiação gama na dose de 1,0 kGy visando verificar se a mesma induziu a degradação do fungicida. As mangas tratadas na pós-colheita foram armazenadas por 21 dias a 12 °C. Os resíduos de Prochloraz não apresentaram decréscimo durante o período de carência (21 dias) estabelecido pela Legislação Brasileira de Agrotóxicos. O armazenamento refrigerado (12 °C) e a irradiação gama também não contribuíram para a degradação do fungicida. O Prochloraz ficou retido principalmente na casca (média = 1,64 µg/g), que funcionou como barreira à contaminação da polpa (média = 0,06 µg/g). O produto de degradação, formado nas cascas das mangas tratadas na pós-colheita, foi identificado como sendo o BTS 44596. Os metabólitos, encontrados em níveis baixos, confirmaram a ocorrência de baixa degradação do fungicida em mangas. 14C-PROCHLORAZ RESIDUES IN IRRADIATED MANGOES Abstract The aim of this work was to evaluate the Prochloraz residual levels applied in mangoes, in pre and post-harvest after radiation treatment. The fruits were submitted to gamma radiation with of 1,0 kGy dose, aiming to verify if it induces the fungicide degradation. Treated post-harvest mangoes were stored, at 12 0C during 21 days. Prochloraz residues did not present reduction after safe period (21 days), established by the Brazilian legislation on agrochemicals. The refrigerated storage (12 0C) and the gamma radiation also did not contribute to the degradation of the fungicide. Prochloraz was mainly retained in the peels (mean = 1,64 µg/g) which served as barrier to the pulp (mean = 0,06 µg/g) contamination. The degradation product, formed in peels of post-harvest treated mangoes was the metabolite BTS 44596. The metabolites found in very low levels, confirm that low fungicide degradation occurs in mangoes.

Degradation and Anticarboxylesterase Activity of Disulfoton and Phorate after 60Co Gamma Irradiation

1969 ◽  
Vol 52 (4) ◽  
pp. 805-811
Author(s):  
D L Grant ◽  
C R Sherwood ◽  
K A Mccully
Keyword(s):  
Gamma Radiation ◽  
Gamma Irradiation ◽  
Low Temperatures ◽  
Brilliant Green ◽  
Organophosphorus Pesticides ◽  
Beef Liver ◽  
Oxygen Analog ◽  
60Co Gamma ◽  
Dose Levels

Abstract Disulfoton and phorate were subjected to gamma radiation from 60Co at dose levels of 0, 0.1, 0.5, 1, 2, and 4 Mrad. The inhibition of beef liver carboxylesterases by disulfoton and phorate in vitro was greater with increasing doses of radiation. The degradation of these organophosphorus pesticides was monitored by GLC with electron capture and phosphorus detectors, by TLC with detection by Brilliant green, and by enzyme inhibition with 5-bromoindoxyl acetate as substrate. The pesticides were degraded to the greatest extent in hexane or acetone solution. Less decomposition occurred at low temperatures. The sulfoxide and oxygen analog were present in most irradiated samples. The sulfone, oxygen analog sulfone, and oxygen analog sulfoxide were present in some of the disulfoton and phorate samples which were irradiated with 4 Mrad.

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