A DBD plasma machine in textile wet processing

The conception of new processes for preparation, dyeing and printing of high quality textile products is presented for a brand new technological solution involving a DBD plasmatic discharge in substrates with cellulosic basis. Developments for the machine design and its implementation in production context are discussed. Results in semi-industrial and industrial prototypes are presented giving wide overview for advantages and benefits achieved in fields such as the shortening and preparation steps, the possibility of close combination of preparation and dyeing operations, the elimination of tensioactives in mercerization of the increase in efficiency of finishing agents and extension of durability of effects. High performance finishing and the use of high technology for the improvement and durability of functional properties obtained in natural textiles are proved to be a great contribution to developments in quality, economy and ecology of textile processes. Textile products with a very high added value, able to answer to the existing or coming exigencies of the market, produced by technologies promoting sustainability, can be regarded as a key point to win a future for textile industry

Improvement of durable properties of surgical textiles using plasma treatment

Nowadays one of the important plasmas used in textile industry is Corona discharge, which is applied in air at atmospheric pressure. Corona offers many advantages such as low production costs mainly due to effective energy utilization and minimum waste materials. In this study, the main focus is to use Corona plasma to produce reusable surgical fabrics with durable properties and using chemical agents at low concentrations. Therefore a new more economic production process of surgical fabric will be offered to textile industry. In order to evaluate the effect of Corona discharge on liquid repellent finishing durability, surface energy was determined by using dynamic contact angle measurement of fabrics treated and non-treated with Corona then finished with products based on fluorocarbons after successive washings. Results showed that Corona increases, significantly, durability of finishing on the fabric. After five washings at 60 ºC, samples pre-treated with Corona at low power levels and finished at lower concentrations preserved their water repellent properties while samples non-treated with Corona and finished with high concentrations lost their affects. To study water resistance, Impact Penetration Test was applied to determine water repellency before and after several washings. The fabrics pre-treated with Corona, after twenty washings, had better effect than samples non-treated after five washings. All results show that Corona improves performance and durability of finishing products. In addition, the fabrics treated and non-treated with Corona and finished by nano-size silver product were analysed before and after washings to determine the effect of Corona on durability of antibacterial finishing

Developments in preparation and dyeing of CORONA discharged cellulosic materials

The preparation and dyeing of cellulosic fabrics hás important problems such as uniformity of aspect, cleaning efficiency, level of bleaching, conformity and fastness of colours, and ecological impact. Combination of preparation processes can give optimal solutions, regarding economy and ecology, especially if superior quality items are achieved in final products. In fact, high standards concerning whiteness, starch removal and hidrophilicity are considered a good basis for leveled, cleaner and intense dyeing. A better white basis, escellent hidrophilicity and enough removal of impurities are obtained if desizing is omitted and a CORONA discharge is made over dry grey material. Exhaustion dyeings with different classes of direct dyes show similar behavior concerning the positive influence of the discharge in the intensity of colours and their fastness. Good penetration of dyes in coronised cotton materials is assured and consequently a good fastness is abtained

Quality improvement and shortcut of preparation of CORONA discharged cotton fabrics

Textile industry has an important impact in world economy and consequently on environmental quality of life. Textile processing uses huge amount of water, chemicals and energy and it is quite easy to conclude about the enormous meaning of pollution control and rationalization of energetic demands. CORONA treatment in the wet processing of cotton textile materials has a great potential concerning the improvement of all the operations included in it, namely in preparation, dyeing, printing or final finishing. Physical and chemical surface changes in cotton structure are noticed after CORONA discharge. The increase in oxidation potential and the creation of channels through cuticle are referred as responsible for the variation in cotton properties after plasmatic discharge, specially concerning absorption of water and treatment baths. Advantages as the use of less chemicals, namely alkalis, oxidants and other auxiliaries, the reduction of times and temperatures, less damages in the materials surely can have a strong impact in economical and ecological aspects of the process. Complete hidrophilization of cellulosic materials renders very easy the access of baths and consequently conditions to more efficient operations are found. Bleaching processes aim to give textile materials the adequate whiteness degree, the removal of sizing agents, the increase of hidrophility and cleaning by extraction of seeds, husks and waxes. The use of hydrogen peroxide in alkaline medium is a flexible and more ecological process when compared with methods based in chlorinated compounds. The present work concerns the study of half bleaching process when this operation is preceded by a CORONA discharge made on dry grey fabrics. The influence in the whiteness degree, hidrophility, starch removal and uniformity of properties of the cellulosic material after preparation is studied

Raw cotton vat dyeing using Corona plasmatic radiation as pre-treatment

Corona tretment consists on the application of an electrical discharge of high voltage (around 10.000V) through air between two electrodes, using frequencies around 40kHz, at normal atmospheric temperature and pressure, on dry cotton fabric, that can be applied in textile processing allowing to rationalize water, energy and chemicals that are spent in huge amounts within this industry, fulfilling the requisites of the new world ecological demands imposed by environmental concerns. When Corona plasmatic radiation is applied as a pre-treatment of raw cotton fabric to be dyed with vat dyes, the process becomes shorter than the conventional one, lowering the costs and execution time, reflecting an economical and ecological impact on the textile process. This treatment is responsible by a complete hydrophilization of raw cotton by means of the oxidation of the hydrophobic layer, making cotton materials ready to dye directly skipping the stages of the preparation. The global differences between conventional vat dyeing process and the process with Corona are evaluated. The final treatment of vat dyeing, in which Corona is previously applied, will include an oxidation process to promote simultaneously insolubilization and cleaning of the fabric. The properties of the vat dyeing products in Corona process are maintained regarding the excellence on fastness to washing and rubbing, improving the uniformity in the final article with higher purity and more intensity and more intensity in darker colours

Soluble human Suppression of Tumorigenicity 2 is associated with endoscopic activity in patients with moderate-to-severe ulcerative colitis treated with golimumab

Suppressor of Tumorigenicity 2 (ST2) is an IL33 receptor detected in the mucosa and serum of ulcerative colitis (UC) patients. We evaluated soluble ST2 (sST2) as a surrogate biomarker of disease outcome and therapeutic response, in moderate-to-severe UC patients treated with golimumab.Agência financiadora Merck Sharp and Dohme, Lda, Portugal MK8259-22info:eu-repo/semantics/publishedVersio

BRSMG União: cultivar de feijão comum de grãos tipo jalo para o Estado de Minas Gerais.

Como existe pequena disponibilidade de cultivares do tipo jalo para plantio, as instituições que trabalham com melhoramento genético do feijoeiro em Minas Gerais, Universidades Federais de Lavras (UFLA) e de Viçosa (UFV), Empresa de Pesquisa Agropecuária de Minas Gerais (Epamig) e Empresa Brasileira de Pesquisa Agropecuária (Embrapa), uniram esforços na avaliação de linhagens com esse tipo de grão, visando a obtenção e recomendação de novas opções de cultivares que fossem superiores à ?Jalo?, indicada para o estado desde o ano de 1980. Como fruto desse trabalho conjunto está sendo recomendada a ?BRSMG União?, uma nova opção de cultivar de feijoeiro com grãos tipo jalo, para o estado de Minas Gerais.CONAFE