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4,372 Newest Publications in journal of agricultural and food chemistry
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Internal and External Validation Strategies for the Evaluation of Long-Term Effects in NIR Calibration Models
11-02-2011 | Valeria Sileoni; Frans van den Berg; Ombretta Marconi; Giuseppe Perretti; Paolo Fantozzi, Journal of Agricultural and Food Chemistry, 2011
Some of the practical aspects of long-term calibration-set building are presented in this study. A calibration model able to predict the Kolbach index for brewing malt is defined, and four different validations and resampling schemes were applied to determine its real predictive power. The ...
Elucidation of the Enantioselective Enzymatic Hydrolysis of Chiral Herbicide Dichlorprop Methyl by Chemical Modification
11-02-2011 | Yuezhong Wen; Chandan Li; Zhaohua Fang; Shulin Zhuang; Weiping Liu, Journal of Agricultural and Food Chemistry, 2011
Up to 25% of the current pesticides are chiral, the molecules have chiral centers, but most of them are used as racemates. In most cases, enantiomers of chiral pesticides have different fates in the environment. Knowledge of the function of amino acids of enzymes involved in enantioselective ...
Metabolism of a New Herbicide, [14C]Pyribenzoxim, in Rice
10-02-2011 | Hee-Ra Chang; Young Soo Keum; Suk-Jin Koo; Joon-Kwan Moon; Kyun Kim; Jeong-Han Kim, Journal of Agricultural and Food Chemistry, 2011
The in vivo metabolism of a new herbicide pyribenzoxim (benzophenone Ο-[2,6-bis(4,6-dimethoxypyrimidin-2-yloxy)benzoyl]oxime) in rice was carried out using container trials. Two radiolabeled forms of [carbonyl-14C]pyribenzoxim (P1) and [ring-14C(U)]pyribenzoxim (P2) were treated separately as ...
Thermal Stability of Ascorbic Acid and Ascorbic Acid Oxidase in African Cowpea Leaves (Vigna unguiculata) of Different Maturities
10-02-2011 | Michael Wawire; Indrawati Oey; Francis Mathooko; Charles Njoroge; Douglas Shitanda; Marc Hendrickx, Journal of Agricultural and Food Chemistry, 2011
Cowpea, an African leafy vegetable (Vigna unguiculata), contains a high level of vitamin C. The leaves harvested at 4−9 weeks are highly prone to vitamin C losses during handling and processing. Therefore, the purpose of this research was to study the effect of thermal treatment on the ...
Simple and Rapid Method for the Analysis of Phenolic Compounds in Beverages and Grains
10-02-2011 | Marjorie B. Medina, Journal of Agricultural and Food Chemistry, 2011
A new method for the detection of phenolics in food systems was developed. This method is based on interactions of phenolics with Fast Blue BB diazonium salt in alkali pH, forming azo complexes, with the absorbance measured at 420 nm after 60 min. The linear regression correlations (R2) of ...
Flavonoids from Radix Astragali Induce the Expression of Erythropoietin in Cultured Cells: A Signaling Mediated via the Accumulation of Hypoxia-Inducible Factor-1α
10-02-2011 | Ken Y. Z. Zheng; Roy C. Y. Choi; Anna W. H. Cheung; Ava J. Y. Guo; Cathy W. C. Bi; Kevin Y. Zhu; Qiang Fu; Yingqing ..., Journal of Agricultural and Food Chemistry, 2011
Radix Astragali (RA) is commonly used as a health food supplement to reinforce the body vital energy. Flavonoids, including formononetin, ononin, calycosin, and calycosin-7-O-β-d-glucoside, are considered to be the major active ingredients within RA. Here, we provided different lines of ...
Kinetic Study of the Quenching Reaction of Singlet Oxygen by Pyrroloquinolinequinol (PQQH2, a Reduced Form of Pyrroloquinolinequinone) in Micellar Solution
10-02-2011 | Kazuo Mukai; Aya Ouchi; Masahiko Nakano, Journal of Agricultural and Food Chemistry, 2011
A kinetic study of the quenching reaction of singlet oxygen (1O2) with pyrroloquinolinequinol (PQQH2, a reduced form of pyrroloquinolinequinone (PQQ)), PQQNa2 (disodium salt of PQQ), and seven kinds of natural antioxidants (vitamin C (Vit C), uric acid (UA), epicatechin (EC), epigallocatechin ...
Effect of Nanogrinding on the Pigment and Bioactivity of Djulis (Chenopodium formosanum Koidz.)
09-02-2011 | Pi-Jen Tsai; Yuh-Shuen Chen; Chih-Hung Sheu; Chin-Yen Chen, Journal of Agricultural and Food Chemistry, 2011
Betanin is an antioxidant pigment found in djulis, a grain native to Taiwan, and is a natural source food coloring, but the bright red color degrades rapidly if submitted to light, heat, or oxygen. The effects of nanogrinding on the stability of pigments and bioactive components are unknown. ...
Rice Bran Fermented with Saccharomyces boulardii Generates Novel Metabolite Profiles with Bioactivity
09-02-2011 | Elizabeth P. Ryan; Adam L. Heuberger; Tiffany L. Weir; Brittany Barnett; Corey D. Broeckling; Jessica E. Prenni, Journal of Agricultural and Food Chemistry, 2011
Emerging evidence supporting chronic disease fighting properties of rice bran has advanced the development of stabilized rice bran for human use as a functional food and dietary supplement. A global and targeted metabolomic investigation of stabilized rice bran fermented with Saccharomyces ...
Isolation and Identification of the DNA Aptamer Target to Acetamiprid
09-02-2011 | Jiang He; Yuan Liu; Mingtao Fan; Xianjin Liu, Journal of Agricultural and Food Chemistry, 2011
As an alternative to antibodies, aptamers have a great potential as analytical tools for pesticide detection. In this work, aptamers targeting acetamiprid were selected by a specific systematic evolution of ligands by exponential enrichment (SELEX) strategy, where a single-stranded DNA ...
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