1176
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Chen G, Kocaoglu-Vurma N, Harper W, Rodriguez-Saona L. Application of infrared microspectroscopy and multivariate analysis for monitoring the effect of adjunct cultures during Swiss cheese ripening. J Dairy Sci 2009; 92:3575-84. [DOI: 10.3168/jds.2008-1939] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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1177
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Chen G, Liu G. Analysis of oxytetracycline residue in salmon muscle using a portable analyzer based on EuIIIluminescence. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2009. [DOI: 10.1080/02652030903013302] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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1178
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Tuutijärvi T, Lu J, Sillanpää M, Chen G. As(V) adsorption on maghemite nanoparticles. JOURNAL OF HAZARDOUS MATERIALS 2009; 166:1415-20. [PMID: 19167160 DOI: 10.1016/j.jhazmat.2008.12.069] [Citation(s) in RCA: 183] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2008] [Revised: 12/11/2008] [Accepted: 12/11/2008] [Indexed: 05/05/2023]
Abstract
In this study a novel adsorbent, maghemite nanoparticles (gamma-Fe(2)O(3)), is used for As(V) removal. Maghemite nanoparticles are an exceptional adsorbent material due to its magnetic properties and a good adsorption capacity. The aims of the study were to investigate the suitability of maghemite nanoparticles for As(V) adsorption and to compare properties of different maghemites and their As(V) adsorption efficiency. Maghemite nanoparticles were characterized by XRD, XPS, TEM, VSM, BET and Zeta potential analyzers. Size of the particles varied from 3.8 to 18.4 nm. Adsorption experiments were carried out with three different kinds of maghemite nanoparticles: (i) commercially available, (ii) homemade with mechanochemical method and (iii) homemade with sol-gel process. All three different kinds of maghemite nanoparticles were successful in removing As(V) from water, one of them reached as high adsorption capacity as 50mg/g.
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1179
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Postel MW, Jaung MS, Chen G, Yu S, Stallones L, Xiang H. Farm work-related injury among middle school students in rural China. J Agric Saf Health 2009; 15:129-42. [PMID: 19496342 DOI: 10.13031/2013.26800] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Farm work-related injuries are considered an important issue facing rural area adolescents. However, little research has been done in developing countries, including China. This study evaluated agricultural work-related injuries among Chinese middle school adolescents, focusing on the potential association between farm work hours, sleep patterns, school-related stress, and farm work-related injuries. This cross-sectional study surveyed 1,551 middle school students in Hunan Province who reported working on farms. The surveys assessed their involvement in farm work, sleep patterns, school activities, and farm work-related injuries during a three-month recall period. The cumulative incidence of farm work-related injury was 15.6% among the 1187 students who reported working on a farm. Average days per month farming, number of pesticide applications per month, sleep disturbances, and school-related stress were significantly associated with farm work-related injuries (p < 0.05). Multivariable logistic regression analysis revealed that after adjusting for possible confounding effects of age, gender, and farm work days per month, sleep disturbance (less than 7 hours of sleep: OR = 2.36, 95% CI = 1.07-5.22; awakening at night and having trouble falling back to sleep: OR = 2.70, 95% CI = 1.36-5.37; having nightmares: OR = 2.24, 95% CI = 1.18-4.24) and school-related stress (difficult homework: OR = 2.45, 95% CI = 1.21-4.99; extra homework assigned often by parents: OR = 3.62, 95% CI = 1.88-6.97; and scolded/chastised by parents for poor school performance: OR = 2.53, 95% CI = 1.75-3.65) were statistically significant risk factors for farm work-related injuries (p < 0.05).
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1180
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Lin L, Chen G, Zou X, Zhao J, Zhu F, Tu M, Xu S, Lin W, Yang S, Zhang Y, Lin M, Chen N, Huang H, Liang J, Li L, Yao J. Diabetes, pre-diabetes and associated risks on Minnesota code-indicated major electrocardiogram abnormality among Chinese: a cross-sectional diabetic study in Fujian province, southeast China. Obes Rev 2009; 10:420-30. [PMID: 19460110 DOI: 10.1111/j.1467-789x.2009.00600.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The goal of this study was to determine the prevalence of diabetes mellitus (DM), impaired glucose regulation (IGR) and related metabolic disorders (overweight, obesity and hypertension) in a Chinese population (20-74 years old). An additional goal was to investigate the relationship between glucose metabolism and the Minnesota code-indicated major abnormal electrocardiogram (MA-ECG). There were 3960 individuals selected from urban and rural areas of Fujian, China from July 2007 to May 2008 by multistage-stratified sampling. Ultimately, data from 3208 subjects (20-74 years old) were analysed (including physical measurements, blood biochemical analysis, oral glucose tolerance test and 12-lead resting ECG). According to World Health Organization diagnostic criteria, the prevalence rates of DM and IGR were 9.51% (male, 10.08%; female, 9.14%) and 14.40% (male, 14.48%; female, 14.35%) respectively. Newly diagnosed DM was found in 53.44% of the diabetic subjects. Based on the 2000 China census, the age-standardized prevalence rates of DM and IGR were 7.19% (male, 7.74%; female, 6.61%) and 11.96 % (male, 12.35%; female, 11.56%) respectively. The age-standardized prevalence rates of DM and IGR in urban areas (7.74% and 12.97% respectively) were slightly but no significantly higher than in rural areas (6.67%, 10.86%). The prevalence rates of overweight, obesity and hypertension were 25.50%, 3.52% and 28.52% respectively (age- and sex- standardized rates: 23.69%, 3.02 % and 22.45 %). After adjusting for other confounding risk factors, multiple logistic regression analysis showed that DM and impaired glucose tolerance were independent risk factors for MA-ECG. Non-diabetic subjects with increased 30-min plasma glucose (PG) after an oral glucose load had a higher risk of MA-ECG after adjusting for other risk factors, especially in those with normal glucose tolerance but with 30-min PG >or= 7.8 mmol L(-1) (odds ratio = 1.371 [1.055-1.780]). The prevalence rates of DM and IGR as well as other metabolic disorders have increased dramatically in the last decade in China, especially in rural areas, with many undiagnosed cases of DM. Even slightly elevated PG levels may predict early cardiovascular events.
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1181
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Pezawas L, Meyer-Lindenberg A, Goldman AL, Verchinski BA, Chen G, Kolachana BS, Egan MF, Mattay VS, Hariri AR, Weinberger DR. Epistasis of BDNF and SLC6A4 impact Brain Structure in Depression. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71706-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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1182
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Riboldi M, Seregni M, Sharp G, Baroni G, Chen G. WE-C-BRC-09: Targeting Accuracy in Real-Time Tumor Tracking Via External Surrogates: A Retrospective Clinical Study. Med Phys 2009. [DOI: 10.1118/1.3182477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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1183
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Chen G, Mori S, Sharp G, Lu H, Wolfgang J, Kung J, Hong T. SU-FF-T-576: Effects of Respiration On Proton Dose Distributions and DVHs in Pancreatic Cancer as Assessed by 4D Treatment Planning. Med Phys 2009. [DOI: 10.1118/1.3182074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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1184
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Peng C, Ahunbay E, Chen G, Lawton C, Li X. SU-FF-T-79: Dosimetric QA Tests of An Online Replanning Technique for Prostate Adaptive Radiotherapy. Med Phys 2009. [DOI: 10.1118/1.3181552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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1185
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Huang C, Chen Y, Zhou T, Chen G. Sulfation of dietary flavonoids by human sulfotransferases. Xenobiotica 2009; 39:312-22. [PMID: 19350454 DOI: 10.1080/00498250802714915] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Dietary flavonoids catechin, epicatechin, eriodictyol, and hesperetin were investigated as substrates and inhibitors of human sulfotransferases (hSULTs). Purified recombinant proteins and human intestine cytosol were used as enzyme sources. hSULT1A1 and hSULT1A3 as well as human intestine cytosol can catalyse the sulfation of the investigated flavonoids. Sulfation of catechin, epicatechin, eriodictyol, and hesperetin by recombinant hSULTs showed substrate inhibition at high flavonoid concentrations. Hesperetin and eriodictyol are potent inhibitors of purified hSULT1A1, hSULT1A3, hSULT1E1, and hSULT2A1. Catechin and epicatechin inhibited hSULT1A1 and hSULT1A3, but not hSULT1E1 and hSULT2A1. The sulfation efficacy and potency of inhibition is related to the C-ring structure of flavonoids. These results suggest that dietary flavonoids may regulate human SULT activity and, therefore, affect the regulation of hormones and neurotransmitters, detoxification of drugs, and the bioactivation of pro- carcinogens and pro-mutagens.
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1186
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Siewerdsen J, Chen G. TU-A-303A-01: C-Arm Cone-Beam CT: Principles and Applications. Med Phys 2009. [DOI: 10.1118/1.3182309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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1187
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Wolfgang J, Lee J, Sharp G, Chen G. SU-FF-J-174: Volume Rendered Cardiac Segmentation and Analysis for Breast Radiotherapy. Med Phys 2009. [DOI: 10.1118/1.3181467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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1188
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Kainz K, White J, Chen G, Li X. SU-FF-T-115: Dosimetric Comparison of Helical Tomotherapy with Conventional Techniques for Simultaneous Irradiation of Prone Breast and Regional Lymph Nodes. Med Phys 2009. [DOI: 10.1118/1.3181589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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1189
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Hallman J, Mori S, Sharp G, Hong T, Chen G. SU-FF-J-99: 4D Multi-Organ Motion Analysis in Pancreatic Cancer Patients. Med Phys 2009. [DOI: 10.1118/1.3181391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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1190
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Lee J, Hallman J, Sharp G, Chen G, Wolfgang J. SU-FF-J-106: Volumetric Visualization of Clinical Contours, Dose, High-Definition Patient Anatomy for Four-Dimensional Adaptive Radiotherapy Treatment Planning. Med Phys 2009. [DOI: 10.1118/1.3181398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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1191
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Chen G, Hu B, Qi S, Schultz C, Wang D, Li X. SU-FF-T-591: Improvement of IMRT Plan Quality with Non-Isocentric Beam Arrangement for Head and Neck Cancers. Med Phys 2009. [DOI: 10.1118/1.3182089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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1192
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Sarker J, Chu A, Mui K, Wolfgang J, Hirsch A, Chen G, Sharp G. SU-FF-T-655: A Simulation of Position and Volume Errors in 4D-CT Caused by Irregular Breathing. Med Phys 2009. [DOI: 10.1118/1.3182153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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1193
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Xia B, Fu X, Cai X, Chen G, Yang H, Fan M, Zhao K. Involved-field radiotherapy for patients with limited small cell lung cancer: Patterns of local-regional failure and feasibility. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.7554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
7554 Background: To investigate the feasibility of the involved-field radiotherapy in patients with limited-stage small cell lung cancer (LSCLC) according to the patterns of local failure, focused on the first local-regional failure. Methods: Two clinical phase II studies for patients with LSCLC treated at our institute between 1997 and 2007 were reviewed. All patients received combined chemotherapy (CHT) with cisplatin and etoposide, and thoracic RT (TRT) was generally delivered sequentially following one to three cycles of CHT and consisted of either 56 Gy in 40 fractions for 4 weeks or 55 Gy in 22 fractions for 4–5 weeks. TRT fields encompassed primary tumor volume (post-CHT) and the involved nodal areas (pre- and post-CHT) without elective node irradiation. The local-regional failure was defined as failure within thoracic cavity and supraclavicular fossa except for pleural effusion, which was then divided into two subtypes: in-field and out-field failure according to the first occurred site in the planning target volume or not. Results: There were 89 patients completed the planed regimen and eligible for evaluating patterns of failure, 54 patients (57%) in 56 Gy cohort and 35 patients(43%) in 55 Gy cohort. The media cycles of CHT were 6 (4–8). The overall survival and local progression-free survival rates for 89 patients at 2 years were 56% and 71%, respectively, with a median survival of 25.6 months. 56 patients (63%) developed distant metastases and 21 patients (24%) developed local-regional failures: 12 in-field and 9 out-field. 8 out of 9 out-field failures occurred in the ipsilateral supraclavicular fossa, and the media duration to the end of TRT was 6 mouths (5–14). Comparing the 56 Gy and 55 Gy cohorts, the rates of any thoracic, in-field and out-field failures were no difference significantly. Conclusions: Thoracic radiotherapy using involved-field technique in patients with LSCLC resulted in a high failure rate of the supraclavicular fossa. Whether improving accuracy for the initial evaluation of clinical stage could reduce out-field failure in supraclavicular fossa need to be investigated. No significant financial relationships to disclose.
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1194
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Wei J, Xie L, Qian X, Chen G, Yu L, Ding Y, Liu B. A novel model including CXCR4 and CDK6 as potential predictive marker for docetaxel (doc) sensitivity in gastric cancer (GC). J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e15548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e15548 Background: A growing body of evidence has shed light on biomarkers for chemotherapeutic agent sensitivity in gastric cancer (GC) treatment. It has been demonstrated β-tubulin Ш (TUBB3) and microtubule associated protein tau (MAPT) might be considered as potential markers for taxanes treatment. However, an integrated predictive model for docetaxel (doc) sensitivity is still needed to customized chemotherapy in gastric cancer. Methods: Doc resistant gastric cancer cell line was established by exposure to gradually increasing doc concentration on an intermittent dosage schedule. Microarray was performed to explore different gene expression levels between parental cells and resistant cells. 11 gastrointestinal cancer cell lines were used to validate gene levels by real-time quantitative PCR as well as doc cytotoxicity. Histoculture drug response assay (HDRA) was adopted to examine doc sensitivity in 25 surgically dissected GC specimens. Discrimination analyses were used to determine which linear combinations of these genes best distinguished responder patients from nonresponder patients by adding one more genes each time. Results: After functional analysis of microarray, a panel of 11 genes were further validated, which resulting 4 genes, CXCR4 (P=0.047), CDK6 (P=0.014), USP15 (P<0.001) and CDH1 (P=0.001) that correlated to the doc sensitivity. The mRNA levels of CXCR4 and CDK6 were significantly higher in resistant GC specimens (P=0.0298, 0.022 respectively). A final response index including 5 genes (CXCR4, CDK6, USP15, TUBB3 and MAPT) showed potential predictive value for doc associated chemotherapy with an accuracy of 84% (P=0.001). Conclusions: A predictive model with five genes for doc therapy was generated and showed novel predictive role in doc sensitivity in GC. No significant financial relationships to disclose.
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1195
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Zhang HJ, Ji BP, Chen G, Zhou F, Luo YC, Yu HQ, Gao FY, Zhang ZP, Li HY. A combination of grape seed-derived procyanidins and gypenosides alleviates insulin resistance in mice and HepG2 cells. J Food Sci 2009; 74:H1-7. [PMID: 19200096 DOI: 10.1111/j.1750-3841.2008.00976.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
This study investigated the effects of grape seed-derived procyanidins (GSP), gypenosides (GPE), and combination procyanidins/gypenosides on insulin resistance in mice and HepG2 cells. ICR mice were randomly divided into 2 control and 4 treatment groups. The control mice were to receive either normal diet (ND) or high-fat diet (HFD), and the treatment groups were fed high-fat diet with either 80 mg/kg of GSP (GSP80), GPE (GPE80), GSP + GPE (1: 1, GSP40 + GPE40), or 500 mg/kg of metformin for a 6-wk period. All the groups of mice except the normal control were on high-fat diet along with fructose (15%) administered in drinking water throughout the period of treatment. An insulin-resistant HepG2 cell model was developed after 24 h of 5 x 10(-7) mol/L insulin incubation. The treatment of GPE80 could significantly reduce the index of insulin resistance (HOMA-IR) and increase hepatic glycogen concentration, compared with HFD group (P < 0.05). When GSP and GPE were administered simultaneously, synergic effects were observed in decreasing the HOMA-IR index and serum total cholesterol (TC) level and enhancing glucose tolerance. All treatment groups showed considerable raise of hepatic glucokinase activity (P < 0.05 compared with HFD group). GSP application increased the consumption of extracellular glucose in HepG2 cells. Our data suggest that the combination of GSP and GPE may have functional efficacy in consumers with insulin resistance.
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1196
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Zhu GH, Lee H, Lan YC, Wang XW, Joshi G, Wang DZ, Yang J, Vashaee D, Guilbert H, Pillitteri A, Dresselhaus MS, Chen G, Ren ZF. Increased phonon scattering by nanograins and point defects in nanostructured silicon with a low concentration of germanium. PHYSICAL REVIEW LETTERS 2009; 102:196803. [PMID: 19518985 DOI: 10.1103/physrevlett.102.196803] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2008] [Indexed: 05/22/2023]
Abstract
The mechanism for phonon scattering by nanostructures and by point defects in nanostructured silicon (Si) and the silicon germanium (Ge) alloy and their thermoelectric properties are investigated. We found that the thermal conductivity is reduced by a factor of 10 in nanostructured Si in comparison with bulk crystalline Si. However, nanosize interfaces are not as effective as point defects in scattering phonons with wavelengths shorter than 1 nm. We further found that a 5 at. % Ge replacing Si is very efficient in scattering phonons shorter than 1 nm, resulting in a further thermal conductivity reduction by a factor of 2, thereby leading to a thermoelectric figure of merit 0.95 for Si95Ge5, similar to that of large grained Si80Ge20 alloys.
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1197
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Wu HS, Wang Y, Zhang CY, Gu M, Liu YX, Chen G, Wang JH, Tang Z, Mao ZS, Shen QR. Physiological and biochemical responses of in vitro Fusarium oxysporum f.sp. niveum to benzoic acid. Folia Microbiol (Praha) 2009; 54:115-22. [PMID: 19418248 DOI: 10.1007/s12223-009-0017-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2008] [Revised: 10/22/2008] [Indexed: 12/22/2022]
Abstract
The allelopathic potential of an artificially applied allelochemical, benzoic acid, on in vitro Fusarium oxysporum f.sp. niveum (a soil-borne pathogen causing watermelon wilt) was evaluated. Benzoic acid strongly inhibited its growth, sporulation and conidia germination, whereas it stimulated virulence factors of this pathogen. The biomass was reduced by 83-96 % and the conidia germinating rate and conidia production rate were decreased by 100 % at a concentration of >200 mg/L. However, phytopathogenic enzyme activities and mycotoxin production were stimulated with an increase of 10.2-1250 % for enzyme activities and 610-2630 % for mycotoxin yield.
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1198
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Liu Y, Chen G, Liu Y, Li R, Wang Z, Shen D. Analysis of genetic regulation and cytokines expressions of distraction osteogenesis reconstruction for cleft palate on rhesus. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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1199
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Zhang Y, Chen G, Fang X, Cao X. Problem based learning practicing in dental alveolar education for 38 Chinese students. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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1200
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Chen G, Liu Y, Liu Y, Ma H, Wang Z, Li H. Analysis of genetic regulation and cytokine expression of distraction osteogenesis reconstruction for cleft palate on rhesus. Part I: insulin-like growth factor-I and alkaline phosphatase. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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