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The putative role of carboxylesterase 2 in insecticide tolerance in Bemisia tabaci
Soyoung Kang,Deok-Ho Kwon,Jung Hun Oh,Si Hyeock Lee 한국응용곤충학회 2010 한국응용곤충학회 학술대회논문집 Vol.2010 No.05
The hemipteran whitefly Bemisia tabaci (Gennadius) is one of the most destructive pests damaging more than 600 agricultural crop species worldwide. The B and Q biotypes are most widely spread in Korea but they are not distinguishable based on morphological characters. Carboxylesterase 2 (Coe2) was determined to be 5.9 times more expressed in B biotype compared to Q biotype. Comparison of deduced amino acid sequences of Coe2 (595 a.a.) showed a total of 3.85% polymorphisms between B and Q types but no differences in major active sites. Quantitative real-time PCR revealed that both B and Q biotypes possess a single copy of coe2, suggesting that the overexpression of Coe2 in B biotype is likely due to overtranscription. To determine the putative role of Coe2 in insecticide tolerance, esterases were separated by native isoelectric focusing (IEF) and inhibited by various insecticides. The putative Coe2 band was apparently inhibited by pyrethroid and organophosphate insecticides, but not by imidacloprid. These findings suggest that overexpression of Coe2 confers chemical defense against pyrethroid and organophosphate insecticides, perhaps by sequestration.
Jin, Soyoung,Oh, Minyoung,Oh, Seung Jun,Oh, Jungsu S.,Lee, Sang Ju,Chung, Sun Ju,Kim, Jae Seung Lippincott 2017 Clinical nuclear medicine Vol.42 No.2
<P>Conclusion: F-18-FP-CIT PETs with the first 10 minutes could be useful for the differential diagnosis of atypical Parkinson disorder by providing complementary FDG-like information to the dopamine transporter binding on late-phase FP-CIT images.</P>
Kim, Daesoo,Yoon, Taeho,Park, Sangjin,Shin, Soyoung,Ryu, Ji Heon,Oh, Seung M. The Electrochemical Society 2014 Journal of the Electrochemical Society Vol.161 No.14
<P>In order to address the role of aluminum dopant in spinel-structured lithium manganese oxide (Li<SUB>1.08</SUB>Mn<SUB>1.84</SUB>Al<SUB>0.08</SUB>O<SUB>3.96</SUB>, Al-doped LMO) electrode, high-temperature (60°C) charge/discharge cycling and storage experiments are carried out. The Al-doped LMO outperforms the un-doped counterpart with respect to capacity fading and Mn dissolution. However, the electrode polarization becomes substantial for the Al-doped LMO after the high-temperature storage. As the resistive component to be responsible for the electrode polarization, Al<SUB>2</SUB>O<SUB>3</SUB> and Al(OH)<SUB>x</SUB>F<SUB>3-x</SUB> are identified on the Al-doped LMO surface from X-ray photoelectron spectroscopy study. It is very likely that the doped Al ions dissolve into the electrolyte during the high-temperature storage but re-deposit as a form of Al<SUB>2</SUB>O<SUB>3</SUB> and Al(OH)<SUB>x</SUB>F<SUB>3-x</SUB> on the LMO surface. Due to a scavenging action of these Al species for hydrogen fluoride, Mn dissolution is suppressed to give an improved cycle and storage performance at elevated temperature.</P>