Read by QxMD icon Read

malic acid

Urtzi Leibar, Inmaculada Pascual, Fermín Morales, Ana Aizpurua, Olatz Unamunzaga
BACKGROUND: Global warming influence on grape quality is a great concern among grapegrowers and enologists. The effects of simulated year 2100 expected CO2 , T and RH conditions (FCC; 700 µmol CO2 /mol air, 28/18 °C day/night and 33/53% RH, day/night) vs. the current condition situation (Curr; 390 µmol CO2 /mol air, 24/14 °C and 45/65% RH); well-irrigated vs. expected future water deficits and three soils with different clay contents (41, 19 and 8%) on yield and berry quality of grapevine cv...
October 17, 2016: Journal of the Science of Food and Agriculture
Kazuo Erami, Yasutake Tanaka, Sayaka Kawamura, Motonori Miyago, Ai Sawazaki, Katsumi Imaizumi, Masao Sato
Egg yolk is an important source of nutrients and contains different bioactive substances. In the present study, we studied the benefits of egg yolk in preventing low-protein-diet-induced fatty liver in rats. Rats were fed the following diets, which were based on the AIN-76 formula, for 2 wk: an adequate-protein diet containing 20% casein (C), a low-protein diet containing 5% casein (LP-C), a low-protein diet supplemented with 12.5% egg yolk (LP-EY), and a low-protein diet supplemented with 4.1% egg yolk oil (LP-EYO)...
2016: Journal of Nutritional Science and Vitaminology
Xuan-Xuan Chen, Yun-Bao Jiang, Eric V Anslyn
A supramolecular polymeric system that shows an unusual "racemate-rules" chiroptical property, an effect opposite to the well-known "majority-rules", has been utilized for accurate determination of malic acid enantiopurity at high ee values.
October 18, 2016: Chemical Communications: Chem Comm
Yunfei Yuan, Yupeng Zhao, Jiali Yang, Yueming Jiang, Fei Lu, Yongxia Jia, Bao Yang
Banana is a tropical fruit widely accepted by people over the world. Its chemical composition is critical for its organoleptic properties and nutritional value. In this work, the metabolite changes during postharvest senescence were investigated using NMR spectroscopy. The 1D and 2D NMR spectroscopic information revealed the primary and secondary metabolites in banana fruit, including organic acids, amino acids, carbohydrates and phenolics. Bananas at five senescence stages showed similar chemical profiles, but the levels of the individual compounds varied to a large extent...
March 1, 2017: Food Chemistry
Manuel Ramírez, Rocío Velázquez, Matilde Maqueda, Emiliano Zamora, Antonio López-Piñeiro, Luis M Hernández
Torulaspora delbrueckii can improve wine aroma complexity, but its impact on wine quality is still far from being satisfactory at the winery level, mainly because it is easily replaced by S. cerevisiae yeasts during must fermentation. New T. delbrueckii killer strains were selected to overcome this problem. These strains killed S. cerevisiae yeasts and dominated fermentation better than T. delbrueckii non-killer strains when they were single-inoculated into crushed red grape must. All the T. delbrueckii wines, but none of the S...
October 3, 2016: International Journal of Food Microbiology
Deepak Pant, Tenzin Dolker
The research reports a novel green method to use citrus fruits for the management of spent NMC based lithium ion batteries (LIBs). Citrus fruit juice (CJ) can provide an excellent chemical combination to remove the binder and support the leaching with efficiency in between 94% to 100%. CJ have many advantages in LIBs recycling as an economic and green method due to rich in many organic acids like citric and malic acid as complexing agents with ascorbic acid and citrus flavonoids, for the reduction of many heavy metals...
September 30, 2016: Waste Management
P Domizio, Y Liu, L F Bisson, D Barile
The present work demonstrates that yeasts belonging to the Schizosaccharomyces genus release a high quantity of polysaccharides of cell wall origin starting from the onset of the alcoholic fermentation. By the end of the alcoholic fermentation, all of the Schizosaccharomyces yeast strains released a quantity of polysaccharides approximately 3-7 times higher than that released by a commercial Saccharomyces cerevisiae yeast strain under the same fermentative conditions of synthetic juice. A higher content of polysaccharide was found in media fermented by Schizosaccharomyces japonicus with respect to that of Schizosaccharomyces pombe...
February 2017: Food Microbiology
Aynur Kurt, Hülya Torun, Nesrin Colak, Gerald Seiler, Sema Hayirlioglu-Ayaz, Faik Ahmet Ayaz
BACKGROUND: The hybrid grape cultivar Isabel (Vitis labrusca x V. vinifera) is widely grown in the Black Sea region of Turkey and constitutes an important part of the diet of its inhabitants. Phenological and ampelographical studies of the grape have previously been performed, but there are no data concerning nutrient composition. Its nutrient content needs to be investigated to ascertain its potential economic and nutritional uses in the region. RESULTS: The concentrations (range, g kg(-1) fresh weight) of major soluble sugars (fructose; 2...
October 3, 2016: Journal of the Science of Food and Agriculture
Muhammad Arif, Mazhar Ali Raja, Shah Zeenat, Zhe Chi, Chenguang Liu
The main objective of this work was to develop polyelectrolyte complex (PEC) nanoparticles based on poly (malic acid), chitosan (PMLA/CS) as pH-dependent delivery systems. The results indicated that the PMLA/CS Nps were successfully prepared. The prepared PMLA/CS Nps showed spherical morphology with a mean diameter of 212.81 nm and negative surface charge of -24.60 mV, and revealing significant pH-sensitive properties as the mass ratio of PMLA to CS was 5:5. The prepared PMLA/CS Nps were characterized by FT-IR, TEM and DLS...
September 30, 2016: Journal of Biomaterials Science. Polymer Edition
Zhen Gao, Chengjun Zhang, Meng Luo, Yusen Wu, Shuyan Duan, Jiefa Li, Lei Wang, Shiren Song, Wenping Xu, Shiping Wang, Caixi Zhang, Chao Ma
Pears are one of the most popular nutrient-rich fruits in the world. The pear core and mesocarp have significantly different metabolism, although they display similar profiles. Most strikingly, the core is more acidic in taste. Our results showed that there is more titrated acid but lower total soluble solids in the core compared to the mesocarp, and the content of citric acid was more than 17-fold higher in the core compared to the mesocarp at the ripening stage. Proteomics was used to investigate the difference between core and mesocarp tissues during 'Cuiguan' pear ripening...
September 30, 2016: Proteomics
Xiaoxiang Dong, Xiulai Chen, Yuanyuan Qian, Yuancai Wang, Li Wang, Weihua Qiao, Liming Liu
A four-carbon dicarboxylic acid L-malate has recently attracted attention due to its potential applications in the fields of medicine and agriculture. In this study, Escherichia coli W3110 was engineered and optimized for L-malate production via one-step L-malate synthesis pathway. First, deletion of the genes encoding lactate dehydrogenase (ldhA), pyruvate oxidase (poxB), pyruvate formate lyase (pflB), phosphotransacetylase (pta), and acetate kinase A (ackA) in pta-ackA pathway led to accumulate 20.9 g/L pyruvate...
September 26, 2016: Biotechnology and Bioengineering
Fumikazu Akamatsu, Tomokazu Hashiguchi, Yuri Hisatsune, Takaaki Oe, Takafumi Kawao, Tsutomu Fujii
A method for detecting the undeclared addition of acidic ingredients is required to control the authenticity of Japanese apricot liqueur. We developed an analytical procedure that minimizes carbon isotope discrimination for measurement of the δ(13)C values of citric and malic acid isolated from Japanese apricot liqueur. Our results demonstrated that freeze-drying is preferable to nitrogen spray-drying, because it does not significantly affect the δ(13)C values of citric acid and results in smaller isotope discrimination for malic acid...
February 15, 2017: Food Chemistry
Fernando G de Macedo, Joana D Bresolin, Elcio F Santos, Felipe Furlan, Wilson T Lopes da Silva, Joe C Polacco, José Lavres
Nickel (Ni) availability in soil varies as a function of pH. Plants require Ni in small quantities for normal development, especially in legumes due its role in nitrogen (N) metabolism. This study investigated the effect of soil base saturation, and Ni amendments on Ni uptake, N accumulation in the leaves and grains, as well as to evaluate organic acids changes in soybean. In addition, two N assimilation enzymes were assayed: nitrate reductase (NR) and Ni-dependent urease. Soybean plants inoculated with Bradyrhizobium japonicum were cultivated in soil-filled pots under two base-cation saturation (BCS) ratios (50 and 70%) and five Ni rates - 0...
2016: Frontiers in Plant Science
Tiehong Yang, Wei Li, Xiao Duan, Lin Zhu, Li Fan, Youbei Qiao, Hong Wu
Polymeric micelles represent an effective delivery system for poorly water-soluble anticancer drugs. In this work, two types of CPT-conjugated polymers were synthesized based on poly(β-L-malic acid) (PMLA) derivatives. Folic acid (FA) was introduced into the polymers as tumor targeting group. The micellization behaviors of these polymers and antitumor activity of different self-assembled micelles were investigated. Results indicate that poly(ethylene glycol)-poly(β-L-malic acid)-campotothecin-I (PEG-PMLA-CPT-I, P1) is a grafted copolymer, and could form star micelles in aqueous solution with a diameter of about 97 nm, also that PEG-PMLA-CPT-II (P2) is an amphiphilic block copolymer, and could form crew cut micelles with a diameter of about 76 nm...
2016: PloS One
Elise Vene, Ghislaine Barouti, Kathleen Jarnouen, Thomas Gicquel, Claudine Rauch, Catherine Ribault, Sophie M Guillaume, Sandrine Cammas-Marion, Pascal Loyer
The present work reports the investigation of the biocompatibility, opsonisation and cell uptake by human primary macrophages and HepaRG cells of nanoparticles (NPs) formulated from poly(β-malic acid)-b-poly(β-hydroxybutyrate) (PMLA-b-PHB) and poly(β-malic acid)-b-poly(trimethylene carbonate) (PMLA-b-PTMC) diblock copolymers, namely PMLA800-b-PHB7300, PMLA4500-b-PHB4400, PMLA2500-b-PTMC2800 and PMLA4300-b-PTMC1400. NPs derived from PMLA-b-PHB and PMLA-b-PTMC do not trigger lactate dehydrogenase release and do not activate the secretion of pro-inflammatory cytokines demonstrating the excellent biocompatibility of these copolymers derived nano-objects...
September 15, 2016: International Journal of Pharmaceutics
Óscar Rodríguez, Wesley Gomes, Sueli Rodrigues, Fabiano A N Fernandes
The effects of the application of an acoustically assisted treatment on the vitamins (C, B1, B2, B3, and B5), the antioxidant activity (DPPH, FRAP), the polyphenol and flavonoid contents, the organic acid contents (citric and malic) and drying kinetics of pineapple (Ananas comosus var. Perola) have been studied. Treatments were carried out using two different soaking media: distilled water and pineapple juice at 30°C during 10, 20 and 30min without and with acoustic assistance (23.2W/L). After treatment, samples were dried at 60°C and 0...
September 7, 2016: Ultrasonics Sonochemistry
Tatjana Gazivoda Kraljević, Anja Harej, Mirela Sedić, Sandra Kraljević Pavelić, Višnja Stepanić, Domagoj Drenjančević, Jasminka Talapko, Silvana Raić-Malić
The 4-substituted 1,2,3-triazole core in designed coumarin hybrids (4-35) with diverse physicochemical properties was introduced by eco-friendly copper(I)-catalyzed Huisgen 1,3-dipolar cycloaddition under microwave irradiation. Coumarin-1,2,3-triazole-benzofused heterocycle hybrids emerged as the class of compounds exhibiting the highest antiproliferative activity. The strong relationship between lipophilicity and antiproliferative activities was observed indicating that lipophilic 1,2,3-triazole-coumarin hybrids containing phenylethyl (13), 3,5-difluorophenyl (14), 5-iodoindole (30) and benzimidazole (33 and 35) subunits showed the most potent cytostatic effects...
August 31, 2016: European Journal of Medicinal Chemistry
Lina Sun, Huarong Chen, Wenxiong Lin, Xiangmin Lin
: Edwardsiella tarda is a virulent fish pathogen that causes extensive economic losses in the aquaculture industry worldwide. The antibiotic resistance status of E. tarda is high, especially in the biofilm status; however, the mechanisms underlying its resistance remain largely unknown. In this study, isobaric tag for relative and absolute quantitation (iTRAQ)-based quantitative proteomics methods were used to compare the differential expression of E. tarda in response to oxytetracycline (OXY) stress in biofilm...
September 13, 2016: Journal of Proteomics
Carolina V Toledo, Carolina Barroetaveña, Ângela Fernandes, Lillian Barros, Isabel C F R Ferreira
This study addresses issues regarding chemical and bioactive properties of nine wild edible mushrooms from native Nothofagus forest from Patagonia, Argentina. Macronutrients, sugars, fatty acids, tocopherols, organic acids, phenolic compounds and antioxidant properties were determined. Protein was found in high levels and varied between 3.35 g/100 g dw in Cyttaria hariotii and 22.29 g/100 g dw in Lepista nuda. All of them presented mannitol and trehalose as main sugars. Mannitol was significantly higher in Ramaria patagonica, although absent in Fistulina endoxantha, whereas trehalose predominated in Aleurodiscus vitellinus, Hydropus dusenii, Cortinarius magellanicus, C...
2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Jiantao Zhao, Yao Xu, Qin Ding, Xinli Huang, Yating Zhang, Zhirong Zou, Mingjun Li, Lu Cui, Jing Zhang
Association mapping has been widely used to map the significant associated loci responsible for natural variation in complex traits and are valuable for crop improvement. Sugars and organic acids are the most important metabolites in tomato fruits. We used a collection of 174 tomato accessions composed of Solanum lycopersicum (123 accessions) and S. lycopersicum var cerasiforme (51 accessions) to detect significantly associated loci controlling the variation of main sugars and organic acids. The accessions were genotyped with 182 SSRs spreading over the tomato genome...
2016: Frontiers in Plant Science
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"