Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.159.099 [Categoria DeCS]
Referências encontradas : 392 [refinar]
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[PMID]:28837871
[Au] Autor:Beltrame KK; Cazetta AL; de Souza PSC; Spessato L; Silva TL; Almeida VC
[Ad] Endereço:Laboratory of Environmental and Agrochemistry, Agrochemistry, Department of Chemistry, The State University of Maringá, 5790 Colombo Avenue, CEP 87020-900-Maringá, Paraná, Brazil.
[Ti] Título:Adsorption of caffeine on mesoporous activated carbon fibers prepared from pineapple plant leaves.
[So] Source:Ecotoxicol Environ Saf;147:64-71, 2018 Jan.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The present work reports the preparation of activated carbon fibers (ACFs) from pineapple plant leaves, and its application on caffeine (CFN) removal from aqueous solution. The preparation procedure was carried out using the H PO as activating agent and slow pyrolysis under N atmosphere. The characterization of materials was performed from the N adsorption and desorption isotherms, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Raman spectroscopy, Boehm titration and pH method. ACFs showed high BET surface area value (S = 1031m g ), well-developed mesoporous structure (mesopore volume of 1.27cm³ g ) and pores with average diameter (D ) of 5.87nm. Additionally, ACFs showed features of fibrous material with predominance of acid groups on its surface. Adsorption studies indicated that the pseudo-second order kinetic and Langmuir isotherm models were that best fitted to the experimental data. The monolayer adsorption capacity was found to be 155.50mgg . thermodynamic studies revealed that adsorption process is spontaneous, exothermic and occurs preferably via physisorption. The pineapple leaves are an efficient precursor for preparation of ACFs, which were successful applied as adsorbent material for removal of caffeine from the aqueous solutions.
[Mh] Termos MeSH primário: Ananas/química
Cafeína/análise
Carbono/química
Folhas de Planta/química
Poluentes Químicos da Água/análise
Purificação da Água/métodos
[Mh] Termos MeSH secundário: Adsorção
Brasil
Carvão Vegetal/química
Cinética
Modelos Teóricos
Termodinâmica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Water Pollutants, Chemical); 0 (carbon fiber); 16291-96-6 (Charcoal); 3G6A5W338E (Caffeine); 7440-44-0 (Carbon)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170825
[St] Status:MEDLINE


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[PMID]:29307830
[Au] Autor:Guo C; Li H; Xia X; Liu X; Yang L
[Ad] Endereço:Agricultural Big-Data Research Center, College of Information Science and Engineering, College of Plant Protection, Shandong Agricultural University, Taian 271018, China.
[Ti] Título:Functional and evolution characterization of SWEET sugar transporters in Ananas comosus.
[So] Source:Biochem Biophys Res Commun;496(2):407-414, 2018 02 05.
[Is] ISSN:1090-2104
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Sugars will eventually be exported transporters (SWEETs) are a group of recently identified sugar transporters in plants that play important roles in diverse physiological processes. However, currently, limited information about this gene family is available in pineapple (Ananas comosus). The availability of the recently released pineapple genome sequence provides the opportunity to identify SWEET genes in a Bromeliaceae family member at the genome level. In this study, 39 pineapple SWEET genes were identified in two pineapple cultivars (18 AnfSWEET and 21 AnmSWEET) and further phylogenetically classified into five clades. A phylogenetic analysis revealed distinct evolutionary paths for the SWEET genes of the two pineapple cultivars. The MD2 cultivar might have experienced a different expansion than the F153 cultivar because two additional duplications exist, which separately gave rise to clades III and IV. A gene exon/intron structure analysis showed that the pineapple SWEET genes contained highly conserved exon/intron numbers. An analysis of public RNA-seq data and expression profiling showed that SWEET genes may be involved in fruit development and ripening processes. AnmSWEET5 and AnmSWEET11 were highly expressed in the early stages of pineapple fruit development and then decreased. The study increases the understanding of the roles of SWEET genes in pineapple.
[Mh] Termos MeSH primário: Ananas/genética
Proteínas de Transporte/genética
Frutas/genética
Regulação da Expressão Gênica de Plantas
Genoma de Planta
Filogenia
Proteínas de Plantas/genética
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Ananas/classificação
Ananas/crescimento & desenvolvimento
Ananas/metabolismo
Evolução Biológica
Proteínas de Transporte/metabolismo
Mapeamento Cromossômico
Éxons
Frutas/crescimento & desenvolvimento
Frutas/metabolismo
Duplicação Gênica
Regulação da Expressão Gênica no Desenvolvimento
Íntrons
Proteínas de Plantas/metabolismo
Alinhamento de Sequência
Homologia de Sequência de Aminoácidos
Açúcares/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Carrier Proteins); 0 (Plant Proteins); 0 (Sugars)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180213
[Lr] Data última revisão:
180213
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180109
[St] Status:MEDLINE


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[PMID]:28764027
[Au] Autor:Xu X; Xue C; Chang Y; Liu G
[Ad] Endereço:College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
[Ti] Título:Chain conformation, rheological and charge properties of fucoidan extracted from sea cucumber Thelenota ananas: A semi-flexible coil negative polyelectrolyte.
[So] Source:Food Chem;237:511-515, 2017 Dec 15.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:As a bioactive and functional polysaccharide, sea cucumber fucoidan has received increasing attention. Chain conformation and physicochemical properties of fucoidan extracted from Thelenota ananas (Ta-FUC) was investigated by utilizing HPSEC-MALLS-Visc-RI, microelectrophoresis and steady shear measurements. The conformation parameter α (0.61±0.02), the Mark-Houwink-Kuhn-Sakurada exponent α (0.92±0.01), α (0.64±0.01) and the Smidsrød-Haug stiffness parameter B (0.036±0.010) consistently manifested that Ta-FUC adopted a semi-flexible coil conformation in NaCl solution. Based on a wormlike cylinder model, stiffness parameters, including persistence length q (13.27±0.80nm) and cylinder diameter d (0.79nm), were calculated. This polysaccharide demonstrated shear-thinning rheological behaviour, and critical concentration from dilute to semidilute concentration regime was determined as 3.6mg/ml. Ta-FUC exhibited as a negative polyelectrolyte in wide pH and ionic strength ranges. These molecular characteristics and physicochemical properties would facilitate further application of Ta-FUC as a functional ingredient in food.
[Mh] Termos MeSH primário: Polissacarídeos/isolamento & purificação
Pepinos-do-Mar
[Mh] Termos MeSH secundário: Ananas
Animais
Polieletrólitos
Viscosidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Polyelectrolytes); 0 (Polysaccharides); 9072-19-9 (fucoidan)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171107
[Lr] Data última revisão:
171107
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170803
[St] Status:MEDLINE


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[PMID]:28403608
[Au] Autor:Nikolaivits E; Makris G; Topakas E
[Ad] Endereço:Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens , 9 Heroon Polytechniou Street, Zographou Campus, 15780 Athens, Greece.
[Ti] Título:Immobilization of a Cutinase from Fusarium oxysporum and Application in Pineapple Flavor Synthesis.
[So] Source:J Agric Food Chem;65(17):3505-3511, 2017 May 03.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In the present study, the immobilization of a cutinase from Fusarium oxysporum was carried out as cross-linked enzyme aggregates. Under optimal immobilization conditions, acetonitrile was selected as precipitant, utilizing 9.4 mg protein/mL and 10 mM glutaraldehyde as cross-linker. The immobilized cutinase (imFocut5a) was tested in isooctane for the synthesis of short-chain butyrate esters, displaying enhanced thermostability compared to the free enzyme. Pineapple flavor (butyl butyrate) synthesis was optimized, leading to a conversion yield of >99% after 6 h, with an initial reaction rate of 18.2 mmol/L/h. Optimal reaction conditions were found to be 50 °C, a vinyl butyrate/butanol molar ratio of 3:1, vinyl butyrate concentration of 100 mM, and enzyme loading of 11 U. Reusability studies of imFocut5a showed that after four consecutive runs, the reaction yield reaches 54% of the maximum. The efficient bioconversion offers a sustainable and environmentally friendly process for the production of "natural" aroma compounds essential for the food industry.
[Mh] Termos MeSH primário: Butiratos/síntese química
Hidrolases de Éster Carboxílico/química
Aromatizantes/química
Proteínas Fúngicas/química
Fusarium/enzimologia
[Mh] Termos MeSH secundário: Ananas/química
Biocatálise
Butiratos/química
Hidrolases de Éster Carboxílico/metabolismo
Enzimas Imobilizadas/química
Enzimas Imobilizadas/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Butyrates); 0 (Enzymes, Immobilized); 0 (Flavoring Agents); 0 (Fungal Proteins); 1BHV00T1M4 (n-butyl n-butyrate); EC 3.1.1.- (Carboxylic Ester Hydrolases); EC 3.1.1.- (cutinase)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170608
[Lr] Data última revisão:
170608
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170414
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.7b00659


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[PMID]:28372238
[Au] Autor:Roda A; Lucini L; Torchio F; Dordoni R; De Faveri DM; Lambri M
[Ad] Endereço:Università Cattolica del Sacro Cuore, Istituto di Enologia e Ingegneria Agro-Alimentare, Via Emilia Parmense 84, 29122 Piacenza, Italy.
[Ti] Título:Metabolite profiling and volatiles of pineapple wine and vinegar obtained from pineapple waste.
[So] Source:Food Chem;229:734-742, 2017 Aug 15.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Vinegar is an inexpensive commodity, and economic considerations require that a relatively low-cost raw material be used for its production. An investigation into the use of a new, alternative substrate - pineapple waste - is described. This approach enables the utilization of the pineapple's (Ananas comosus) peels and core, which are usually discarded during the processing or consumption of the fruit. Using physical and enzymatic treatments, the waste was saccharified, and the resulting substrate was fermented with Saccharomyces cerevisiae for 7-10days under aerobic conditions at 25°C. This resulted in an alcohol yield of approximately 7%. The alcoholic medium was then used as a seed broth for acetic fermentation using Acetobacter aceti as the inoculum for approximately 30days at 32°C to obtain 5% acetic acid. Samples were analyzed at the beginning and end of the acetification cycle to assess the volatile and fixed compounds by GC-MS and UHPLC-QTOF-MS. The metabolomic analysis indicated that l-lysine, mellein, and gallic acid were significantly more concentrated in the pineapple vinegar than in the original wine. Higher alcohols, aldehydes, and ketones characterized the aroma of the final pineapple vinegar, whilst off-flavors were significantly reduced relative to the initial wine. This study is the first to highlight the metabolite profile of fruit vinegar with a slight floral aroma profile derived from pineapple waste. The potential to efficiently reduce the post-harvest losses of pineapple fruits by re-using them for products with added food values is also demonstrated.
[Mh] Termos MeSH primário: Ácido Acético/análise
Ácido Acético/metabolismo
Ananas/metabolismo
Metaboloma
Vinho/análise
[Mh] Termos MeSH secundário: Acetobacter/metabolismo
Ananas/química
Cromatografia Líquida de Alta Pressão/métodos
Fermentação
Aromatizantes/análise
Aromatizantes/metabolismo
Frutas/química
Frutas/metabolismo
Cromatografia Gasosa-Espectrometria de Massas/métodos
Saccharomyces cerevisiae/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Flavoring Agents); Q40Q9N063P (Acetic Acid)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170523
[Lr] Data última revisão:
170523
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170405
[St] Status:MEDLINE


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[PMID]:28317739
[Au] Autor:Techavuthiporn C; Boonyaritthongchai P; Supabvanich S
[Ad] Endereço:Division of Biological Science, Faculty of Science and Technology, HuachiewChalermprakiet University, Samutprakarn, Thailand. Electronic address: chairat.tec@gmail.com.
[Ti] Título:Physicochemical changes of 'Phulae' pineapple fruit treated with short-term anoxia during ambient storage.
[So] Source:Food Chem;228:388-393, 2017 Aug 01.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The effects of short-term anoxia exposure for 16h on physicochemical changes of 'Phulae' pineapple fruit stored at ambient temperature (25±2°C) were investigated. The respiratory rate of the fruit was induced by the anoxia treatment. However, it retarded the increase in moisture loss and maintained both flesh and pulp colour by inhibiting polyphenol oxidase (PPO) activity of the both tissues. The anoxia exposure delayed the increase in total sugar content and enhanced total ascorbic acid content during storage. The half-cut pineapple fruit showed that the anoxia exposure completely inhibited internal transparency of the flesh tissue adjacent to core during the storage. In conclusion, the short-term anoxia exposure for 16h maintained postharvest quality, retarded physiological disorder and enhanced nutritional values of the pineapple fruit stored at ambient temperature (25±2°C).
[Mh] Termos MeSH primário: Ananas/química
Frutas/química
Hipóxia/metabolismo
[Mh] Termos MeSH secundário: Armazenamento de Alimentos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170501
[Lr] Data última revisão:
170501
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170321
[St] Status:MEDLINE


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[PMID]:28238440
[Au] Autor:Matagne A; Bolle L; El Mahyaoui R; Baeyens-Volant D; Azarkan M
[Ad] Endereço:Université de Liège, Laboratoire d'Enzymologie et Repliement des Protéines, Centre d'Ingénierie des Protéines, Liège, Belgium.
[Ti] Título:The proteolytic system of pineapple stems revisited: Purification and characterization of multiple catalytically active forms.
[So] Source:Phytochemistry;138:29-51, 2017 Jun.
[Is] ISSN:1873-3700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Crude pineapple proteases extract (aka stem bromelain; EC 3.4.22.4) is an important proteolytic mixture that contains enzymes belonging to the cysteine proteases of the papain family. Numerous studies have been reported aiming at the fractionation and characterization of the many molecular species present in the extract, but more efforts are still required to obtain sufficient quantities of the various purified protease forms for detailed physicochemical, enzymatic and structural characterization. In this work, we describe an efficient strategy towards the purification of at least eight enzymatic forms. Thus, following rapid fractionation on a SP-Sepharose FF column, two sub-populations with proteolytic activity were obtained: the unbound (termed acidic) and bound (termed basic) bromelain fractions. Following reversible modification with monomethoxypolyethylene glycol (mPEG), both fractions were further separated on Q-Sepharose FF and SP-Sepharose FF, respectively. This procedure yielded highly purified molecular species, all titrating ca. 1 mol of thiol group per mole of enzyme, with distinct biochemical properties. N-terminal sequencing allowed identifying at least eight forms with proteolytic activity. The basic fraction contained previously identified species, i.e. basic bromelain forms 1 and 2, ananain forms 1 and 2, and comosain (MEROPS identifier: C01.027). Furthermore, a new proteolytic species, showing similarities with basic bomelain forms 1 and 2, was discovered and termed bromelain form 3. The two remaining species were found in the acidic bromelain fraction and were arbitrarily named acidic bromelain forms 1 and 2. Both, acidic bromelain forms 1, 2 and basic bromelain forms 1, 2 and 3 are glycosylated, while ananain forms 1 and 2, and comosain are not. The eight protease forms display different amidase activities against the various substrates tested, namely small synthetic chromogenic compounds (DL-BAPNA and Boc-Ala-Ala-Gly-pNA), fluorogenic compounds (like Boc-Gln-Ala-Arg-AMC, Z-Arg-Arg-AMC and Z-Phe-Arg-AMC), and proteins (azocasein and azoalbumin), suggesting a specific organization of their catalytic residues. All forms are completely inhibited by specific cysteine and cysteine/serine protease inhibitors, but not by specific serine and aspartic protease inhibitors, with the sole exception of pepstatin A that significantly affects acidic bromelain forms 1 and 2. For all eight protease forms, inhibition is also observed with 1,10-phenanthrolin, a metalloprotease inhibitor. Metal ions (i.e. Mn , Mg and Ca ) showed various effects depending on the protease under consideration, but all of them are totally inhibited in the presence of Zn . Mass spectrometry analyses revealed that all forms have a molecular mass of ca. 24 kDa, which is characteristic of enzymes belonging to the papain-like proteases family. Far-UV CD spectra analysis further supported this analysis. Interestingly, secondary structure calculation proves to be highly reproducible for all cysteine proteases of the papain family tested so far (this work; see also Azarkan et al., 2011; Baeyens-Volant et al., 2015) and thus can be used as a test for rapid identification of the classical papain fold.
[Mh] Termos MeSH primário: Ananas/química
Cisteína Proteases/isolamento & purificação
Extratos Vegetais/análise
Proteínas de Plantas/isolamento & purificação
Proteólise
[Mh] Termos MeSH secundário: Bromelaínas/análise
Fracionamento Químico/métodos
Cisteína Endopeptidases/análise
Cisteína Proteases/análise
Proteínas de Plantas/análise
Caules de Planta/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Extracts); 0 (Plant Proteins); 9001-00-7 (Bromelains); EC 3.4.- (Cysteine Proteases); EC 3.4.22.- (Cysteine Endopeptidases); EC 3.4.22.- (comosain); EC 3.4.22.31 (ananain); EC 3.4.22.32 (stem bromelain)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170501
[Lr] Data última revisão:
170501
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170228
[St] Status:MEDLINE


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[PMID]:28159298
[Au] Autor:da Silva TL; Aguiar-Oliveira E; Mazalli MR; Kamimura ES; Maldonado RR
[Ad] Endereço:Integrated College Maria Imaculada, R. Paula Bueno, Centro, Postal Code: 13.080-040, Mogi Guaçu, São Paulo, Brazil.
[Ti] Título:Comparison between titrimetric and spectrophotometric methods for quantification of vitamin C.
[So] Source:Food Chem;224:92-96, 2017 Jun 01.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Vitamin C is usually quantified by titrimetric or chromatographic methods. However, these methods have limitations: food color interferes with the titrimetric method and the chromatographic method is costly. The aim of this study was to compare a spectrophotometric method, based on reduction of cupric ions in the presence of cuproine complex, with a titrimetric method, based on reduction of 2,6-dicholorophenolindophenol. Linearity, precision, accuracy, and limits of detection (LOD) and quantification (LOQ) were evaluated using a standard vitamin C solution. Both methods were also applied for AA quantification in industrialized orange and pineapple juices. The methods were precise and accurate when applied to the standard solution. The spectrophotometric method was more sensitive, with lower values for LOD (0.002mgmL ) and LOQ (0.010mgmL ), and more accurate with error less than 5% while results from the titrimetric method were affected by the juice color, which generated errors in excess of 15%.
[Mh] Termos MeSH primário: Ananas
Ácido Ascórbico/análise
Técnicas de Química Analítica/métodos
Citrus sinensis
Sucos de Frutas e Vegetais/análise
[Mh] Termos MeSH secundário: Técnicas de Química Analítica/normas
Limite de Detecção
Espectrofotometria/métodos
Espectrofotometria/normas
Titulometria/métodos
Titulometria/normas
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE
[Nm] Nome de substância:
PQ6CK8PD0R (Ascorbic Acid)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170817
[Lr] Data última revisão:
170817
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170205
[St] Status:MEDLINE


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[PMID]:28095462
[Au] Autor:Li X; Kanakala S; He Y; Zhong X; Yu S; Li R; Sun L; Ma J
[Ad] Endereço:College of Landscape Architecture of Sichuan Agricultural University, Chengdu, Sichuan, China.
[Ti] Título:Physiological Characterization and Comparative Transcriptome Analysis of White and Green Leaves of Ananas comosus var. bracteatus.
[So] Source:PLoS One;12(1):e0169838, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Leaf coloration is one of the most important and attractive characteristics of Ananas comosus var. bracteatus. The chimeric character is not stable during the in vitro tissue culturing. Many regenerated plants lost economic values for the loss of the chimeric character of leaves. In order to reveal the molecular mechanisms involved in the albino phenotype of the leaf cells, the physiological and transcriptional differences between complete white (CWh) and green (CGr) leaf cells of A. comosus var. bracteatus were analyzed. A total of 1,431 differentially expressed unigenes (DEGs) in CGr and CWh leaves were identified using RNA-seq. A comparison to the COG, GO and KEGG annotations revealed DEGs involved in chlorophyll biosynthesis, chloroplast development and photosynthesis. Furthermore, the measurement of main precursors of chlorophyll in the CWh leaves confirmed that the rate-limiting step in chlorophyll biosynthesis, and thus the cause of the albino phenotype of the white cells, was the conversion of pyrrole porphobilinogen (PBG) to uroporphyrinogen III (Uro III). The enzyme activity of porphobilinogen deaminase (PBGD) and uroporporphyrinogn III synthase (UROS), which catalyze the transition of PBG to Uro III, was significantly decreased in the CWh leaves. Our data showed the transcriptional differences between the CWh and CGr plants and characterized key steps in chlorophyll biosynthesis of the CWh leaves. These results contribute to our understanding of the mechanisms and regulation of pigment biosynthesis in the CWh leaf cells of A. comosus var. bracteatus.
[Mh] Termos MeSH primário: Ananas/genética
Clorofila/metabolismo
Regulação da Expressão Gênica de Plantas
Folhas de Planta/genética
Proteínas de Plantas/genética
Transcriptoma/genética
[Mh] Termos MeSH secundário: Ananas/metabolismo
Perfilação da Expressão Gênica
Sequenciamento de Nucleotídeos em Larga Escala
Fotossíntese
Folhas de Planta/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Proteins); 1406-65-1 (Chlorophyll)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170808
[Lr] Data última revisão:
170808
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170118
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0169838


  10 / 392 MEDLINE  
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[PMID]:28049294
[Au] Autor:Dai H; Huang H
[Ad] Endereço:School of Food Science and Engineering, South China University of Technology , Guangzhou 510641, China.
[Ti] Título:Enhanced Swelling and Responsive Properties of Pineapple Peel Carboxymethyl Cellulose-g-poly(acrylic acid-co-acrylamide) Superabsorbent Hydrogel by the Introduction of Carclazyte.
[So] Source:J Agric Food Chem;65(3):565-574, 2017 Jan 25.
[Is] ISSN:1520-5118
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The superabsorbent hydrogels were synthesized by grafting acrylic acid and acrylamide onto pineapple peel carboxymethyl cellulose and effect of carclazyte introduction was compared. The structure and morphology of the superabsorbents were investigated by Fourier transform infrared spectroscopy, X-ray diffraction, and field emission scanning electron microscopy. Swelling behaviors of the superabsorbents were investigated in distilled water, 0.9% NaCl solution, various salt and pH solutions, as well as surfactant solutions and simulated physiological fluids. The swelling dynamic mechanism of the superabsorbents was explained well by Fickian diffusion and Schott's pseudo-second-order models. The introduction of carclazyte effectively improved the swelling capacity of the superabsorbents in various solutions as well as its salt- and pH-sensitivity. The prepared superabsorbents also exhibited excellent sensitivities to various surfactant solutions and simulated physiological fluids, showing potential applications in the biomaterials field.
[Mh] Termos MeSH primário: Acrilamidas/química
Ananas/química
Carboximetilcelulose Sódica/química
Hidrogel de Polietilenoglicol-Dimetacrilato/química
Extratos Vegetais/química
[Mh] Termos MeSH secundário: Adsorção
Catálise
Frutas/química
Concentração de Íons de Hidrogênio
Difração de Raios X
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Acrylamides); 0 (Plant Extracts); 0 (poly(acrylamide-co-acrylic acid)); 25852-47-5 (Hydrogel, Polyethylene Glycol Dimethacrylate); K679OBS311 (Carboxymethylcellulose Sodium)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170105
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jafc.6b04899



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