http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Shim, Junghyun,Torollo, Gideon,Angeles-Shim, Rosalyn B.,Cabunagan, Rogelio C.,Choi, Il-Ryong,Yeo, Un-Sang,Ha, Woon-Goo 日本育種學會 2015 Breeding science Vol. No.
<P>Rice tungro disease (RTD) is one of the destructive and prevalent diseases in the tropical region. RTD is caused by <I>Rice tungro spherical virus</I> (RTSV) and <I>Rice tungro bacilliform virus</I>. Cultivation of japonica rice (<I>Oryza sativa</I> L. ssp <I>japonica</I>) in tropical Asia has often been restricted because most japonica cultivars are sensitive to short photoperiod, which is characteristic of tropical conditions. Japonica1, a rice variety bred for tropical conditions, is photoperiod-insensitive, has a high yield potential, but is susceptible to RTD and has poor grain quality. To transfer RTD resistance into Japonica1, we made two backcrosses (BC) and 8 three-way crosses (3-WC) among Japonica1 and RTSV-resistant cultivars. Among 8,876 BC<SUB>1</SUB>F<SUB>2</SUB> and 3-WCF<SUB>2</SUB> plants, 342 were selected for photoperiod-insensitivity and good grain quality. Photoperiod-insensitive progenies were evaluated for RTSV resistance by a bioassay and marker-assisted selection (MAS), and 22 BC<SUB>1</SUB>F<SUB>7</SUB> and 3-WCF<SUB>7</SUB> lines were selected based on the results of an observational yield trial. The results demonstrated that conventional selection for photoperiod-insensitivity and MAS for RTSV resistance can greatly facilitate the development of japonica rice that is suitable for cultivation in tropical Asia.</P>
Yang, Angel,Park, Jong-Hyouk,Abd El-Aty, A.M.,Choi, Jeong-Heui,Oh, Jae-Ho,Do, Jung-Ah,Kwon, Kisung,Shim, Ki-Hoon,Choi, Ok-Ja,Shim, Jae-Han Elsevier 2012 FOOD CONTROL Vol.28 No.1
<P><B>Abstract</B></P><P>The principal objective of this study was to investigate the effect of household processing, including washing and cooking on pesticide residue levels in various food samples. For this study, 31 food materials were selected and 44 pesticide residues were monitored using the “quick, easy, cheap, effective, rugged, and safe” QuEChERS extraction-based and liquid chromatography–tandem mass spectrometry (LC–MS/MS) methods. Eight pesticides, including acetamiprid, azoxystrobin, fenobucarb, fosthiazate, iprobenfos, lufenuron, propiconazole, and trifloxystrobin were detected in nine food samples including colored rice, glutinous rice (white rice), glutinous rice (unpolished rice), green chili, ginger, butterbur, chinamul, spinach, and perilla leaf. Results indicated that residue levels in positive food commodities declined substantially following washing and cooking. However, the residual level of acetamiprid increased in green chilis after boiling and stir-frying. In sum, household processing (washing and cooking) tended to substantially reduce or eliminate pesticide residues in a synergistic manner. These applications are necessary to protect consumers from the negative health effects of pesticide residues detected in food commodities.</P> <P><B>Highlights</B></P><P>► The effects of household processing on pesticide residue levels were investigated. ► Residue levels were substantially declined following washing and cooking. ► The household processing tend to remove the residues in a synergistic manner.</P>
Park, Ji-Yeon,Yang, Angel,Park, Jong-Hyouk,Abd El-Aty, A.M.,Oh, Jae-Ho,Do, Jung-Ah,Kwon, Kisung,Shim, Ki-Hoon,Choi, Ok-Ja,Shim, Jae-Han The Korean Society for Applied Biological Chemistr 2012 Applied Biological Chemistry (Appl Biol Chem) Vol.55 No.4
Separation of pesticides and other chemical contaminants from fatty food matrices prior to subsequent steps in the analytical process remains a challenging issue, and much effort has been invested to further enhance this method. The aim of the present study was to develop a simple multi-residue method involving a quick, easy, cheap, effective, rugged, and safe (QuEChERS) extraction method for the identification and quantification of 41 pesticide residues in cooked fatty food matrices, including heated soybean oil, roasted sesame, and boiled soybean using gas chromatography-micro/electron capture detector (GC-${\mu}ECD$). The analytes were subsequently confirmed via GC-mass spectrometry (MS). The responses of analytes were linear with excellent correlation coefficients ($r^2$) ranging from 0.993 to 1.000 (calculated from absolute peak areas). For the majority of the tested pesticides, the mean recoveries ranged from 68.5 and 121.4% with relative standard deviations ranging from 0.4 to 18.7%. Instrument limits of detection and quantification ranged from 0.004 to $0.30{\mu}g/kg$ and 0.0125 to $1.00{\mu}g/kg$, respectively. The developed method presented in this study was applied successfully to determine pesticide residue levels in cooked fatty food matrices. None of the samples contained detectable amounts of pesticide residues.
Ji-Yeon Park,Angel Yang,Jong-Hyouk Park,A. M. Abd El-Aty,Jae-Ho Oh,Jung-Ah Do,Kisung Kwon,Ki-Hoon Shim,최옥자,심재한 한국응용생명화학회 2012 Applied Biological Chemistry (Appl Biol Chem) Vol.55 No.4
Separation of pesticides and other chemical contaminants from fatty food matrices prior to subsequent steps in the analytical process remains a challenging issue, and much effort has been invested to further enhance this method. The aim of the present study was to develop a simple multi-residue method involving a quick, easy, cheap, effective, rugged, and safe (QuEChERS)extraction method for the identification and quantification of 41pesticide residues in cooked fatty food matrices, including heated soybean oil, roasted sesame, and boiled soybean using gas chromatography-micro/electron capture detector (GC-μECD). The analytes were subsequently confirmed via GC-mass spectrometry (MS). The responses of analytes were linear with excellent correlation coefficients (r 2) ranging from 0.993 to 1.000 (calculated from absolute peak areas). For the majority of the tested pesticides, the mean recoveries ranged from 68.5 and 121.4% with relative standard deviations ranging from 0.4 to 18.7%. Instrument limits of detection and quantification ranged from 0.004 to 0.30 μg/kg and 0.0125 to 1.00 μg/kg, respectively. The developed method presented in this study was applied successfully to determine pesticide residue levels in cooked fatty food matrices. None of the samples contained detectable amounts of pesticide residues.
Na, Tae Woong,Rahman, Md. Musfiqur,Park, Jong-Hyouk,Yang, Angel,Park, Ki Hun,El-Aty, A.M. Abd,Shim, Jae-Han 한국응용생명화학회 2012 Applied Biological Chemistry (Appl Biol Chem) Vol.55 No.5
Persistence and degradation behaviors of acequinocyl and hydroxyacequinocyl were determined in perilla leaf grown under greenhouse conditions. Acequinocyl (15%, SC) was sprayed on perilla leaf at the recommended dose rate of 37.5 g/250 L water/10a with single and double dose applications. Leaf samples were collected randomly at 0 (2 h after application), 1, 3, 5, and 7 days post-application from two different plots. The samples were extracted with acetonitrile, purified through a solid phase extraction procedure, and analyzed via ultra performance liquid chromatography coupled with photo diode array detector (UPLC-PDA). Residues were confirmed via liquid chromatography tandem mass spectrometry (LC-MS/MS) in positive-ion electrospray ionization ($ESI^+$) mode. Calibration curves were linear over the concentration ranges for the analytes with $r^2{\geq}0.992$. The limits of detection and quantification were 0.05 and 0.165 mg/kg for both acequinocyl and hydroxyacequinocyl. The method was validated in triplicate at two fortification concentrations in the matrix. Good recoveries were observed for the target analytes, ranging between 94.95 and 113.26% with relative standard deviations less than 6%. The rates of disappearance of total acequinocyl on perilla leaf for single and double doses were described as first-order kinetics with half-lives of 2.8 and 3.1-days, respectively.