376
|
Yan H, Yin F. SU-E-T-860: Developing a Fast-Monotonic Descent (FMD) Algorithm for RapidArc Radiotherapy. Med Phys 2011. [DOI: 10.1118/1.3612824] [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
|
377
|
Scott CB, Chang VT, Gonzalez ML, Einhorn J, Yan H, Zhou B, Crump B, Kasimis B. Multidimensional model of hope and survival in patients with advanced cancer. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e19575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
378
|
Mitschelen M, Yan H, Farley JA, Warrington JP, Han S, Hereñú CB, Csiszar A, Ungvari Z, Bailey-Downs LC, Bass CE, Sonntag WE. Long-term deficiency of circulating and hippocampal insulin-like growth factor I induces depressive behavior in adult mice: a potential model of geriatric depression. Neuroscience 2011; 185:50-60. [PMID: 21524689 DOI: 10.1016/j.neuroscience.2011.04.032] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Revised: 03/28/2011] [Accepted: 04/13/2011] [Indexed: 12/21/2022]
Abstract
Numerous studies support the hypothesis that deficiency of insulin-like growth factor I (IGF-1) in adults contributes to depression, but direct evidence is limited. Many psychological and pro-cognitive effects have been attributed to IGF-1, but appropriate animal models of adult-onset IGF-1 deficiency are lacking. In this study, we use a viral-mediated Cre-loxP system to knockout the Igf1 gene in either the liver, neurons of the CA1 region of the hippocampus, or both. Knockout of liver Igf1 reduced serum IGF-1 levels by 40% and hippocampal IGF-1 levels by 26%. Knockout of Igf1 in CA1 reduced hippocampal IGF-1 levels by 13%. The most severe reduction in hippocampal IGF-1 occurred in the group with knockouts in both liver and CA1 (36% reduction), and was associated with a 3.5-fold increase in immobility in the forced swim test. Reduction of either circulating or hippocampal IGF-1 levels did not alter anxiety measured in an open field and elevated plus maze, nor locomotion in the open field. Furthermore, local compensation for deficiencies in circulating IGF-1 did not occur in the hippocampus, nor were serum levels of IGF-1 upregulated in response to the moderate decline of hippocampal IGF-1 caused by the knockouts in CA1. We conclude that adult-onset IGF-1 deficiency alone is sufficient to induce a depressive phenotype in mice. Furthermore, our results suggest that individuals with low brain levels of IGF-1 are at increased risk for depression and these behavioral effects are not ameliorated by increased local IGF-1 production or transport. Our study supports the hypothesis that the natural IGF-1 decline in aging humans may contribute to geriatric depression.
Collapse
|
379
|
Yang S, Wu J, Zuo Y, Tan L, Jia H, Yan H, Zhu X, Zeng M, Ma J, Huang W. ZD6474, a small molecule tyrosine kinase inhibitor, potentiates the anti-tumor and anti-metastasis effects of radiation for human nasopharyngeal carcinoma. Curr Cancer Drug Targets 2011; 10:611-22. [PMID: 20491619 DOI: 10.2174/156800910791859506] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2009] [Accepted: 03/12/2010] [Indexed: 11/22/2022]
Abstract
PURPOSE To investigate the capacity for ZD6474, a small molecule tyrosine kinase inhibitor, to enhance anti-tumor and anti-metastasis effects of radiation on human nasopharyngeal carcinoma (NPC). EXPERIMENTAL DESIGN NPC cell lines and xenograft models were evaluated following treatment with ZD6474 and radiation alone and in combination compared with untreated control mice. RESULTS Treatment with ZD6474 enhanced the anti-proliferative effect of radiation on NPC cell lines as detected by cell proliferation and apoptosis assays. ZD6474 also induced a significant increase in the radiosensitivity of NPC cells, with radiation enhancement ratios (RERs) ranging from 1.2 to 1.6. Despite the cytotoxicity exhibited by NPC cells following radiotherapy, the invasion and migration of NPC cells was found to be unaffected. In contrast, treatment with ZD6474 strongly inhibited the invasion and migration of NPC cells. When the administration of radiation and ZD6474 was investigated in vitro, the ability of ZD6474 to inhibit activation of the pro-survival signaling pathways induced by radiation was demonstrated. In vivo, ZD6474 significantly enhanced the anti-metastasis effects of radiation, while treatment with radiation and ZD6474 was found to be well tolerated and resulted in a strong inhibition of tumor growth. CONCLUSIONS Our results suggest the combination of radiation and ZD6474 represents a promising strategy for the treatment of human NPC.
Collapse
|
380
|
Schneider DA, Yan H, Bastos RG, Johnson WC, Gavin PR, Allen AJ, Barrington GM, Herrmann-Hoesing LM, Knowles DP, Goff WL. Dynamics of bovine spleen cell populations during the acute response to Babesia bovis infection: an immunohistological study. Parasite Immunol 2011; 33:34-44. [PMID: 21155841 DOI: 10.1111/j.1365-3024.2010.01249.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The spleen is a critical organ in defence against haemoparasitic diseases like babesiosis. Many in vitro and ex vivo studies have identified splenic cells working in concert to activate mechanisms required for successful resolution of infection. The techniques used in those studies, however, remove cells from the anatomical context in which cell interaction and trafficking take place. In this study, an immunohistological approach was used to monitor the splenic distribution of defined cells during the acute response of naïve calves to Babesia bovis infection. Splenomegaly was characterized by disproportionate hyperplasia of large versus small leucocytes and altered distribution of several cell types thought to be important in mounting an effective immune response. In particular, the results suggest that the initial crosstalk between NK cells and immature dendritic cells occurs within the marginal zone and that immature dendritic cells are first redirected to encounter pathogens as they enter the spleen and then mature as they process antigen and migrate to T-cell-rich areas. The results of this study are remarkably similar to those observed in a mouse model of malarial infection, suggesting these dynamic events may be central to the acute response of naïve animals to haemoparasitic infection.
Collapse
|
381
|
Yan H, Cannon WR, Shanefield DJ. Poly(Vinyl Butyral) Pyrolysis: Interactions with Plasticizer and Ain Ceramic Powder. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-249-377] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTTGA and FTIR were employed to investigate the effects of dibutyl phthalate and butyl benzyl phthalate on the thermal degradation behavior of PVB, a binder used commonly for tape casting. Butyl benzyl phthalate was found to enhance the crosslinking of the PVB binder when heated in a nitrogen atmosphere during binder pyrolysis, which retarded its thermal degradation.The interaction between AIN powder and PVB binder was also studied by using TGA, XPS and a special furnace for collecting residual carbon. Intrinsic char and gas phase mediated char were studied separately.
Collapse
|
382
|
Hao C, Yan H, Yang H, Huan X, Guan W, Xu X, Zhang M, Tang W, Wang N, Gu J, Lau JTF. The incidence of syphilis, HIV and HCV and associated factors in a cohort of men who have sex with men in Nanjing, China. Sex Transm Infect 2011; 87:199-201. [DOI: 10.1136/sti.2010.042903] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
|
383
|
Yin R, Hao F, Deng J, Yang XC, Yan H. Investigation of optimal aminolaevulinic acid concentration applied in topical aminolaevulinic acid-photodynamic therapy for treatment of moderate to severe acne: a pilot study in Chinese subjects. Br J Dermatol 2011; 163:1064-71. [PMID: 20491770 DOI: 10.1111/j.1365-2133.2010.09860.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Aminolaevulinic acid-photodynamic therapy (ALA-PDT) is a novel and effective treatment in acne. However, little is known about the effect of different concentrations of ALA in the treatment of acne in Chinese patients with Fitzpatrick skin type III and IV. OBJECTIVES To investigate the efficacy and safety of ALA-PDT in the treatment of moderate to severe acne in Chinese patients and to identify the suitable concentration of topical ALA. METHODS One hundred and eighty patients with moderate to severe facial acne were recruited and randomly divided into four groups. Each group was treated with a different concentration (5%, 10%, 15% and 20%) of ALA to the facial lesions on the right side and placebo agent on the left side as control. Each patient was treated once every 10 days for four sessions. The numbers of inflammatory and noninflammatory acne lesions were counted at baseline and at weeks 2, 4, 12 and 24 after the last treatment. Adverse effects were recorded at each follow-up visit. RESULTS After 24 weeks, each side treated by ALA-PDT showed clinical improvement compared with the control side treated by red light alone (P < 0·01). Statistically significantly more patients treated with 20% ALA than with 15% or 10% ALA achieved complete clearance. Regarding side-effects, a trend towards more serious erythema and pigmentation was observed with increasing ALA concentration. CONCLUSIONS Increasing the concentration of ALA seems to be beneficial for improving the results. Considering effectiveness and safety, ALA-PDT using 10% or 15% ALA is suggested to the ideal treatment for moderate to severe acne in Chinese patients with Fitzpatrick skin type III and IV.
Collapse
|
384
|
He WJ, Fu ZH, Han HJ, Yan H, Zeng GZ, Ji CJ, Chu HB, Zhang YM, Tan NH. Benzoic Acid Allopyranosides and Lignan Glycosides from the Twigs of Keteleeria evelyniana. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2011. [DOI: 10.5560/znb.2011.66b0733] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
385
|
Wang C, Hexemer A, Nasiatka J, Chan ER, Young AT, Padmore HA, Schlotter WF, Lüning J, Swaraj S, Watts B, Gann E, Yan H, Ade H. Resonant Soft X-ray Scattering of Polymers with a 2D Detector: Initial Results and System Developments at the Advanced Light Source. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1757-899x/14/1/012016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
386
|
Kimura M, Koontz B, Yan H, Rabbani Z, Satoh T, Baba S, Yin F, Donatucci C, Polascik T, Vujaskovic Z. A Modern Animal Model of Radiation-induced Erectile Dysfunction. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
387
|
Xu Q, Yang S, Wang Z, Yan Z, Jia X, Yan H. Efficient Heterotrophic Culture of Chlorella USTB-01 by Feeding the Mixture of Glucose and A Nitrogen Containing Compound. J Biotechnol 2010. [DOI: 10.1016/j.jbiotec.2010.09.807] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
388
|
Liu J, Mendenhall MP, Holley AT, Back HO, Bowles TJ, Broussard LJ, Carr R, Clayton S, Currie S, Filippone BW, García A, Geltenbort P, Hickerson KP, Hoagland J, Hogan GE, Hona B, Ito TM, Liu CY, Makela M, Mammei RR, Martin JW, Melconian D, Morris CL, Pattie RW, Pérez Galván A, Pitt ML, Plaster B, Ramsey JC, Rios R, Russell R, Saunders A, Seestrom SJ, Sondheim WE, Tatar E, Vogelaar RB, VornDick B, Wrede C, Yan H, Young AR. Determination of the axial-vector weak coupling constant with ultracold neutrons. PHYSICAL REVIEW LETTERS 2010; 105:181803. [PMID: 21231098 DOI: 10.1103/physrevlett.105.181803] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Indexed: 05/30/2023]
Abstract
A precise measurement of the neutron decay β asymmetry A₀ has been carried out using polarized ultracold neutrons from the pulsed spallation ultracold neutron source at the Los Alamos Neutron Science Center. Combining data obtained in 2008 and 2009, we report A₀ = -0.119 66±0.000 89{-0.001 40}{+0.001 23}, from which we determine the ratio of the axial-vector to vector weak coupling of the nucleon g{A}/g{V}=-1.275 90{-0.004 45}{+0.004 09}.
Collapse
|
389
|
Wang D, Han Y, Zang H, Yan H, Zang D. e0553 Effect of pulmonary hypertension on the prognosis of patients with cardiac resynchronisation therapy. BRITISH HEART JOURNAL 2010. [DOI: 10.1136/hrt.2010.208967.553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
390
|
Bao Y, Yan H, Liu L, Xu Q. Efficient Extraction of Lycopene from Rhodopseudomonas palustris with n-Hexane and Methanol after Alkaline Wash. Chem Eng Technol 2010. [DOI: 10.1002/ceat.201000033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
391
|
Al-Chalabi A, Matevossian E, Preissel A, Perren A, Yang Z, Schuster T, Schreiber C, Schimmel P, Nairz E, Yan H, Geiger A, Kreymann B. A model of ischemic isolated acute liver failure in pigs: standardizing monitoring and treatment. ACTA ACUST UNITED AC 2010; 45:86-97. [PMID: 20847566 DOI: 10.1159/000319878] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Accepted: 08/02/2010] [Indexed: 11/19/2022]
Abstract
BACKGROUND Acute liver failure (ALF) models in pigs have been widely used for evaluating newly developed liver support systems. But hardly any guidelines are available for the surgical methods and the clinical management. METHODS The study validated several standard operating procedures describing in detail the surgical method and intensive care monitoring and treatment (control of potassium, glucose and bicarbonate levels, cardiovascular and intracranial pressure monitoring, etc.). ALF was induced in animals with a mean of 56 kg. Two surgical methods were compared: ligation of hepatic arteries with either end-to-side portacaval shunt (ESPS) and bile duct ligation or side-to-side portacaval shunt (SSPS) without bile duct ligation. RESULTS During total portal vein clamping, the animals in the ESPS group developed severe hypotension, splanchnic congestion and metabolic acidosis. One animal died after approximately 1.5 h. This model therefore represents a multiorgan failure model rather than an isolated ALF model. In the SSPS group, none of these side effects were observed, while clinical, laboratory and histopathological signs of ALF were evident. CONCLUSIONS A reproducible model in pigs representing ALF can be established with the help of the standardized monitoring and treatment procedures presented.
Collapse
|
392
|
Zhou W, Yan H. A discriminatory function for prediction of protein-DNA interactions based on alpha shape modeling. Bioinformatics 2010; 26:2541-8. [DOI: 10.1093/bioinformatics/btq478] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
393
|
Wang X, Wen X, Criddle C, Yan H, Zhang Y, Ding K. Bacterial community dynamics in two full-scale wastewater treatment systems with functional stability. J Appl Microbiol 2010; 109:1218-26. [PMID: 20477893 DOI: 10.1111/j.1365-2672.2010.04742.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To characterize the bacterial community dynamics over 1 year in two full-scale wastewater treatment systems operated under constant conditions and exhibiting stable performance. METHODS AND RESULTS Functional stability was defined and quantified by the effluent concentration of biological oxygen demand, total nitrogen and ammonia. Community dynamics were investigated using specific PCR followed by terminal restriction fragment length polymorphism (T-RFLP) of the 16S rRNA gene. The T-RFLP results indicated that during the period of functional stability, the bacterial community structures in two full-scale wastewater treatment systems were not stable, and the average change rates every 15 days of the two systems were 22.6 ± 6.9 and 21.6 ± 7.3%, respectively. The corresponding species with dominant T-RFs were determined by clonal sequencing and T-RFLP. Based on Pareto-Lorenz distribution curves, it was observed that only a small number of micro-organisms were numerically dominant in the two systems. CONCLUSIONS The results of this study showed that, throughout the period of the study, the bacterial community structure changed significantly in two full-scale wastewater treatment systems despite the stable function. SIGNIFICANCE AND IMPACT OF THE STUDY The findings enrich the theory involving the relation between bacterial community dynamics and functional stability in full-scale wastewater treatment plants.
Collapse
|
394
|
Zhao Y, Zou D, Wang R, Ma X, Yan X, Man X, Gao L, Fang J, Yan H, Kang X, Yin P, Hao Y, Li Q, Dent J, Sung J, Halling K, Wernersson B, Johansson S, He J. Dyspepsia and irritable bowel syndrome in China: a population-based endoscopy study of prevalence and impact. Aliment Pharmacol Ther 2010; 32:562-72. [PMID: 20497141 DOI: 10.1111/j.1365-2036.2010.04376.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND Dyspepsia and irritable bowel syndrome (IBS) are common in Western populations. AIM To determine the epidemiology of dyspepsia and IBS in China. METHODS A representative sample of 18 000 adults from five regions of China were asked to complete the modified Rome II questionnaire; 20% were asked to complete the 36-item Short Form Health Survey (SF-36). Participants from Shanghai were invited to provide blood samples and undergo oesophago-gastroduodenoscopy. Odds ratios (ORs) and 95% confidence intervals (CIs) were determined using a multivariate logistic regression model. RESULTS The survey was completed by 16 091 individuals (response rate: 89.4%). Overall, 387 participants (2.4%) had dyspepsia and 735 (4.6%) had IBS. All SF-36 dimension scores were at least five points lower in individuals with than without dyspepsia or IBS (P < or = 0.001). In Shanghai, 1030 (32.7%) of the 3153 respondents agreed to endoscopy; neither dyspepsia nor IBS was found to be associated with reflux oesophagitis, peptic ulcer disease or Helicobacter pylori infection. CONCLUSIONS Prevalence estimates for dyspepsia and IBS in China are lower than in Western populations. In China, dyspepsia or IBS symptoms are generally not associated with underlying organic disease.
Collapse
|
395
|
Yang S, Wu J, Zuo Y, Tan L, Jia H, Yan H, Zhu X, Zeng M, Ma J, Huang W. ZD6474, a Small Molecule Tyrosine Kinase Inhibitor, Potentiates the Anti-Tumor and Anti-Metastasis Effects of Radiation for Human Nasopharyngeal Carcinoma. Curr Cancer Drug Targets 2010. [DOI: 10.2174/1568210204916190096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
396
|
Bi Y, Lai D, Yan H. Synthetic evaluation of the effect of health promotion: impact of a UNICEF project in 40 poor western counties of China. Public Health 2010; 124:376-91. [PMID: 20609869 DOI: 10.1016/j.puhe.2010.03.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2009] [Revised: 02/07/2010] [Accepted: 03/16/2010] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To synthetically evaluate the effects of a health promotion project launched by the Ministry of Health of China and the United Nations Children's Fund (UNICEF) in 40 poor western counties of China. STUDY DESIGN The two surveys were cross-sectional studies. Stratified multistage random sampling was used to recruit subjects. METHODS Data were collected through two surveys conducted in the 40 'UNICEF project counties' in 1999 and 2000. After categorizing the 27 evaluation indicators into four aspects, a hybrid of the Analytic Hierarchy Process, the Technique for Order Preference by Similarity to Ideal Solution, and linear weighting were used to analyse the changes. The 40 counties were classified into three different levels according to differences in the synthetic indicator derived. Comparing the synthetic evaluation indicators of these two surveys, issues for implementation of the project were identified and discussed. RESULTS The values of the synthetic indicators were significantly higher in 2000 than in 1999 (P=0.02); this indicated that the projects were effective. Among the 40 counties, 11 counties were at a higher level in 2000, 10 counties were at a lower level, and others were in the middle level. Comparative analysis showed that 36% of village clinics were not licensed to practice medicine, nearly 50% of village clinics had no records of medicine purchases, nearly 20% of village clinics had no pressure cooker for disinfection, and 20% of pregnant women did not receive any prenatal care. CONCLUSIONS The health promotion projects in the 40 counties were effective. Health management, medical treatment conditions, maternal health and child health care have improved to some extent. However, much remains to be done to improve health care in these 40 poor counties. The findings of this study can help decision makers to improve the implementation of such improvements.
Collapse
|
397
|
Yan H, Koontz B, Kimura M, Vujaskovic Z, Yin F. TH-C-204B-07: Development of Image-Guided Radiosurgery with Novalis TX for Small Animal Study. Med Phys 2010. [DOI: 10.1118/1.3469500] [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
|
398
|
Chang VT, Scott CB, Yan H, Gonzalez ML, Einhorn J, Zhou B, Cogswell J, Crump B, McPherson M, Kasimis B. Patient-reported outcomes for determining prognostic groups in veterans with advanced cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.9040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
399
|
Xu LQ, Liu XD, Sun LG, Yan H, Liu Y, Luo YH, Huang J, Wang YH. Distribution of radionuclides in the guano sediments of Xisha Islands, South China Sea and its implication. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2010; 101:362-368. [PMID: 20346552 DOI: 10.1016/j.jenvrad.2010.02.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2009] [Revised: 02/04/2010] [Accepted: 02/15/2010] [Indexed: 05/29/2023]
Abstract
Several natural and anthropogenic radionuclides ((210)Pb, (226)Ra and (137)Cs) in guano-phosphatic coral sediments and pure guano particles collected from Ganquan, Guangjin, Jinqing and Jinyin Islands of the Xisha archipelago, South China Sea, were analyzed. The Constant Initial Concentration (CIC) model and the Constant Rate of Supply (CRS) model were applied for age calculation. The average supply rate of (210)Pb was 126 Bq m(-2) a(-1), very close to the flux of northern hemisphere average (125 Bq m(-2) a(-1)). The activities of anthropogenic radionuclides in the sediments were very low, indicating that human nuclear tests did not notably impact this region. The main source of radionuclides in the sediments was from atmospheric precipitation, and the organic matter derived from plant and produced by nutrient-rich guano could further enhance them.
Collapse
|
400
|
Yan H, Yu SH, Xie GL, Fang W, Su T, Li B. Grain Discoloration of Rice Caused by Pantoea ananatis (synonym Erwinia uredovora) in China. PLANT DISEASE 2010; 94:482. [PMID: 30754503 DOI: 10.1094/pdis-94-4-0482b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In the autumn of 2008, a new bacterial disease of rice was noted in paddy fields near Hangzhou, Zhejiang Province, China. The disease caused severe discoloration of rice grains on cv. Zhong-zhe-you 1 (Oryza sativa L.). It often occurred at early flowering of hybrid rice. Initially, light, rusty, water-soaked lesions appeared on the lemma or palea and then turned brown. More immature and lighter grains were observed on panicles at harvest. No bacterial ooze was observed. Ten bacterial isolates were recovered from eight samples of discolored rice grains (1). Six isolates were selected for identification. They were similar to those of the reference strain of Pantoea ananatis (Serrano, synonym Erwinia uredovora) LMG 2665T (ATCC 33244) from Belgium in phenotypic tests based on the Biolog Microbial Identification System, version 4.2 (Biolog Inc., Hayward, CA), pathogenicity tests, gas chromatographic analysis of fatty acid methyl esters (FAME) using the Microbial Identification System (MIDI Inc, Newark, DE) with the aerobic bacterial library (TAB 5.0), and electron microscopy (TEM,KYKY-1000B, Japan). All isolates were facultatively anaerobic, gram-negative rods that measured 1.6 to 2.5 × 0.5 to 0.7 μm and had three to six peritrichous flagella. Colonies on nutrient agar were yellow and raised with smooth margins. A hypersensitive reaction was observed on tobacco (Nicotiana tobacum cv. Benshi) 24 h after inoculation. All isolates were identified as P. ananatis with Biolog similarity indices of 0.716 to 0.852 and FAME similarity indices of 0.783 to 0.903. Further identification as P. ananatis was done by 16S rDNA sequence analysis. Amplicons were produced from three strains using the universal primers (3) fD2: 5'-AGA GTT TGA TCA TGG CTC AG-3' forward primer and rP1: 5'-ACG GTT ACC TTG TTA CGA CTT-3' reverse primer and then sequenced (GenBank Accession Nos. GU324769, GU324770, and GU338399). A BlastN search of GenBank revealed that they had 97 to 98% nt identity with P. ananatis strain 3Pe76 (GenBank Accession No. EF178449). Koch's postulates were completed by spray inoculating panicles of rice cv. Zhong-zhe-you 1 at booting stage, grown in pots, with cell suspensions containing 108 CFU/ml of the six strains at 25 to 29°C. Three plants were inoculated with each strain, controls were sprayed with water, and the experiment was repeated once. Three weeks after inoculation, all strains produced symptoms on panicles similar to those observed in the field. Yellow pigmented bacteria were reisolated from symptomatic panicles and their identity was confirmed by FAMEs. These results indicate that the pathogen is P. ananatis (2), which also causes leaf blight and bulb decay of onion. To our knowledge, this is the first report of rice grain discoloration caused by P. ananatis in China. The disease cycle on rice and the control strategies in the regions are being further studied. References: (1) J. Y. Luo et al. Plant Dis. 91:1363, 2007. (2) H. G. Truper and L. de Clari. Int. J. Syst. Bacteriol. 47:908, 1997. (3) W. G. Weisburg et al. J. Bacteriol. 173:697, 1991.
Collapse
|