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Havelin J, Imbert I, Sukhtankar D, Remeniuk B, Pelletier I, Gentry J, Okun A, Tiutan T, Porreca F, King TE. Mediation of Movement-Induced Breakthrough Cancer Pain by IB4-Binding Nociceptors in Rats. J Neurosci 2017; 37:5111-5122. [PMID: 28438966 PMCID: PMC5444195 DOI: 10.1523/jneurosci.1212-16.2017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Revised: 03/30/2017] [Accepted: 04/14/2017] [Indexed: 02/04/2023] Open
Abstract
Cancer-induced bone pain is characterized by moderate to severe ongoing pain that commonly requires the use of opiates. Even when ongoing pain is well controlled, patients can suffer breakthrough pain (BTP), episodic severe pain that "breaks through" the medication. We developed a novel model of cancer-induced BTP using female rats with mammary adenocarcinoma cells sealed within the tibia. We demonstrated previously that rats with bone cancer learn to prefer a context paired with saphenous nerve block to elicit pain relief (i.e., conditioned place preference, CPP), revealing the presence of ongoing pain. Treatment with systemic morphine abolished CPP to saphenous nerve block, demonstrating control of ongoing pain. Here, we show that pairing BTP induced by experimenter-induced movement of the tumor-bearing hindlimb with a context produces conditioned place avoidance (CPA) in rats treated with morphine to control ongoing pain, consistent with clinical observation of BTP. Preventing movement-induced afferent input by saphenous nerve block before, but not after, hindlimb movement blocked movement-induced BTP. Ablation of isolectin B4 (IB4)-binding, but not TRPV1+, sensory afferents eliminated movement-induced BTP, suggesting that input from IB4-binding fibers mediates BTP. Identification of potential molecular targets specific to this population of fibers may allow for the development of peripherally restricted analgesics that control BTP and improve quality of life in patients with skeletal metastases.SIGNIFICANCE STATEMENT We present a novel preclinical measure of movement-induced breakthrough pain (BTP) that is observed in the presence of morphine controlling ongoing pain. Blockade of sensory input before movement prevented BTP, whereas nerve block after movement failed to reverse BTP. These observations indicate that blocking peripheral sensory input may prevent BTP and targeting central sites may be required for pain relief once BTP has been initiated. Preventing sensory input from TRPV1-expressing fibers failed to alter movement-induced BTP. In contrast, preventing sensory input from isolectin B4 (IB4)-binding fibers blocked movement-induced BTP. Therefore, examining molecular targets on this population of nociceptive fibers may prove useful for developing an improved strategy for preventing BTP in cancer patients with skeletal metastases.
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Affiliation(s)
- Joshua Havelin
- Department of Biomedical Sciences, College of Osteopathic Medicine, Center for Excellence in the Neurosciences, University of New England, Biddeford, Maine 04005, and
| | - Ian Imbert
- Department of Biomedical Sciences, College of Osteopathic Medicine, Center for Excellence in the Neurosciences, University of New England, Biddeford, Maine 04005, and
| | | | | | - Ian Pelletier
- Department of Biomedical Sciences, College of Osteopathic Medicine, Center for Excellence in the Neurosciences, University of New England, Biddeford, Maine 04005, and
| | - Jonathan Gentry
- Department of Biomedical Sciences, College of Osteopathic Medicine, Center for Excellence in the Neurosciences, University of New England, Biddeford, Maine 04005, and
| | - Alec Okun
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, Arizona 85724
| | - Timothy Tiutan
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, Arizona 85724
| | - Frank Porreca
- Department of Cancer Biology, Arizona Cancer Center, and
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, Arizona 85724
| | - Tamara E King
- Department of Biomedical Sciences, College of Osteopathic Medicine, Center for Excellence in the Neurosciences, University of New England, Biddeford, Maine 04005, and
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Dearborn M, Pelletier I, Gentry J, Havelin J, Imbert I, Sukhtankar D, Remeniuk B, Porreca F, King T. (306) Pain and pain relief: using motivation to explore mechanisms underlying cancer-induced pain in rats. The Journal of Pain 2016. [DOI: 10.1016/j.jpain.2016.01.213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Thompson S, Gentry J. The best of both worlds: Combining heart failure and palliative care in interdisciplinary rounds. Heart Lung 2010. [DOI: 10.1016/j.hrtlng.2010.05.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Gentry J. SU-FF-T-588: Novel Use of Electron Pre-Planning Software and a Penumbral Calculator Improves Abutment of Megavoltage Electron/Electron Fields. Med Phys 2009. [DOI: 10.1118/1.3182086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Abstract
This paper describes a framework for collecting, annotating, and archiving high-throughput assays from multiple experiments conducted on one or more series of samples. Specific applications include support for large-scale surveys of related transcriptional profiling studies, for investigations of the genetics of gene expression and for joint analysis of copy number variation and mRNA abundance. Our approach consists of data capture and modeling processes rooted in R/Bioconductor, sample annotation and sequence constituent ontology management based in R, secure data archiving in PostgreSQL, and browser-based workspace creation and management rooted in Zope. This effort has generated a completely transparent, extensible, and customizable interface to large archives of high-throughput assays. Sources and prototype interfaces are accessible at www.sgdi.org/software.
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Affiliation(s)
- V J Carey
- Channing Laboratory, Brigham and Women's Hospital, Harvard Medical School, 181 Longwood Avenue, Boston, MA 02115, USA.
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Malki AM, Gentry J, Evans SC. Differential effect of selected methylxanthine derivatives on radiosensitization of lung carcinoma cells. Exp Oncol 2006; 28:16-24. [PMID: 16614702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
AIM Using caffeine as a reference derivative, this study was performed to investigate how other methylxanthine derivatives, theophylline, 3-isobutyl-methylxanthine and 1,3-dipropyl-7-methylxanthine, sensitize cells to radiation by modifying cell cycle checkpoints and inducing the apoptotic response. The effect of the methylxanthine derivatives was studied in response to gamma and ultraviolet radiation in a human large cell lung carcinoma cell line, null for p53, a normal lung epithelial cell line and the large cell lung carcinoma cell line stably transfected with p53. METHODS Effects of theophylline, 3-isobutyl-methylxanthine and 1,3-dipropyl 7-methylxanthine on cell-radiosensitization in comparison to caffeine tested by clonogenic survival assay, MTT assay, ELISA based apoptotic assay, flow cytometry, caspase-3 activity, TUNEL assay, and western blot analysis. RESULTS All the derivatives, except 3-isobutyl-methylxanthine, increased tumor cell sensitization to radiation by inducing apoptosis in the p53-null lung cancer cell line. The pattern of cell cycle progression revealed that these derivatives increased the number of cells in G1 phase by abrogating the G2/M checkpoint, directing the cells to apoptose through a p53-independent mechanism. In contrast, 3-isobutyl-methylxanthine was more potent than the other derivatives in radiosensitization of normal lung epithelial cells and the lung carcinoma cells stably transfected with wild-type p53. IBMX increased p53 protein level more than caffeine in lung carcinoma cells stably transfected with wild-type p53. CONCLUSION Our results suggest that 3-isobutyl-methylxanthine might function through a p53-dependent mechanism.
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Affiliation(s)
- A M Malki
- Edison Biotechnology Institute, Department of Chemistry and Biochemistry, Ohio University, Athens, 45701, USA
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Klingler ET, Bernal K, Paustian F, Schafer D, Hoagbin J, Gentry J, Swindells S. A 48-Year-Old HIV-Positive Man with Chronic Intermittent Diarrhea. Clin Infect Dis 2004. [DOI: 10.1086/424461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Klingler ET, Bernal K, Paustian F, Schafer D, Hoagbin J, Gentry J, Swindells S. A 48-year-old HIV-positive man with chronic intermittent diarrhea. Clin Infect Dis 2004; 39:1174, 1239-40. [PMID: 15495344 DOI: 10.1086/424448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- E Toubes Klingler
- Sections of Infectious Diseases, Department of Internal Medicine, University of Nebraska Medical Center, Omaha 68198-5400, USA.
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Kellert R, Preston R, Johnson C, Safferman D, Shaplro M, Gentry J. Evaluation of Dual Mechanism Impactors for Isometric Particles. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/i360076a006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gentry J, Steeves R, Paliwal B, Mehta M, Hartje S. The operational impact of a program to measure and monitor radiation dose to external beam patients. J Oncol Manag 2000; 9:10-5. [PMID: 11186555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Abstract
Urokinase plasminogen activator (uPA) generates plasmin, a process inhibited by plasminogen-activator inhibitor (PAI)-1 and localized to the cell surface by binding of uPA to a specific receptor. Plasmin degrades extracellular matrix (ECM) both directly and by activation of matrix metalloproteinases (MMPs). Because stellate cells play a central role in the pathogenesis of liver fibrosis both via production of ECM proteins and through secretion of MMPs, their contribution to plasmin generation was assessed. Stellate cells were prepared from rat liver and cultured on plastic. Northern analysis showed cellular expression of messenger RNA (mRNA) for PAI-1, uPA, and uPA receptor. Zymography/reverse zymography identified cell-surface-associated uPA activity and uPA and PAI-1 in culture media. Net uPA activity in culture media was maximal after 7 days in culture and then declined, whereas PAI-1 antigen levels remained consistently elevated between 7 and 21 days in culture. Stellate cell-mediated plasmin generation was also seen in in vitro cultures supplemented with plasminogen. Because hepatic stellate cells (HSCs) contain retinoids and release them on activation, the effect of retinoic acid on the plasminogen-activating system was also assessed. Treatment of cultured HSCs with retinoic acid (1 micromol/L) increased uPA secretion 2.6-fold but did not alter PAI-1. We conclude that stellate cells synthesize key components of the plasminogen-activating system and generate plasmin and therefore have the ability to regulate MMP activation. Upregulation of uPA synthesis by retinoic acid may have implications in matrix remodeling in sites of stellate cell activation in which high concentrations of retinoids may be achieved.
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Affiliation(s)
- H Leyland
- University Medicine, Southampton General Hospital, England
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Abstract
BACKGROUND & AIMS Hepatic lipocyte proliferation and activation are pivotal in liver fibrosis. Disruption of normal lipocyte-matrix interactions may contribute to this process. The synthesis of transin, which degrades normal liver matrix, by culture-activated hepatic lipocytes was investigated. METHODS Lipocytes were isolated by pronase/collagenase perfusion, density gradient centrifugation, and centrifugal elutriation. Transin messenger RNA in lipocytes was analyzed by Northern blotting. Transin activity was analyzed by zymography, Western blotting, immunocytochemistry, and quantitative [14C]beta-casein degradation assay. RESULTS Transin messenger RNA was detected in early primary culture (3-5 days) but not in freshly isolated lipocytes or late primary culture. Zymography of lipocyte medium showed caseinolytic activity (relative molecular weight, 57 kilodaltons and 60 kilodaltons) inhibited by ethyl-enediaminetetraacetic acid but not thiol or serine protease inhibitors. Immunoblotting and immunocytochemistry confirmed the presence of transin in media and cells. Quantitative transin activity decreased progressively with increasing duration of primary lipocyte culture and myofibroblastic transformation. CONCLUSION Rat hepatic lipocytes express the transin gene and secrete its product during the early phase of lipocyte activation in primary culture. Because this enzyme degrades a wide spectrum of normal basement membrane proteins and activates progelatinase B and interstitial collagenase, it may have an important role in liver injury and fibrosis.
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Affiliation(s)
- S K Vyas
- University of Southampton, Hampshire, England
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Gentry J. Hospital restructuring: good news or bad? Imprint 1993; 40:31-2. [PMID: 8150470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Kreider R, Ratzlaff R, Bertun E, Edwards J, Miriel V, Lloyd C, Gentry J. 682 EFFECTS OF AMINO ACID & CARNITINE SUPPLEMENTATION ON IMMUNE STATUS DURING AN INTERCOLLEGIATE SWIM SEASON. Med Sci Sports Exerc 1993. [DOI: 10.1249/00005768-199305001-00684] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Affiliation(s)
- J Gentry
- Institute for Social Research, University of Michigan, Ann Arbor
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Lloyd G, Dowling E, Redondo D, Kreider R, Miller G, Williams M, Gentry J. EFFECTS OF A COMMERCIAL SUPPLEMENT CONTAINING SODIUM PHOSPHATE AND BICARBONATE ON HEMATOLOGIC RESPONSES TO SWIM PERFORMANCE. Med Sci Sports Exerc 1992. [DOI: 10.1249/00005768-199205001-00285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bertun E, Kreider R, Ratzlaft R, Edwards J, Redondo D, Dowling E, Miriel V, Williams M, Somma T, Sechrist S, Coleman F, Gentry J. EFFECTS OF AMINO ACID & CARNITINE SUPPLEMENTATION DURING SWIM TRAINING ON IMMUNE STATUS I. Med Sci Sports Exerc 1992. [DOI: 10.1249/00005768-199205001-00006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Redondo D, Kreider R, Mirlel V, Dowling E, Benun E, Willlama M, Somma T, Sechrist S, Coleman F, Gentry J. EFFECTS OF AMWO ACID It CARNITINE SUPPLEMENTATION ON PROTEIN DEGRADATION AND SUBSTRATE USE IN INTERCOLLEGIATE SWIMMERS. Med Sci Sports Exerc 1992. [DOI: 10.1249/00005768-199205001-00008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kreider R, Ratzlaff R, Bertun E, Edwards J, Redondo D, Dowling E, Miriel V, Williams M, Somma T, Sochrist S, Coleman F, Gentry J. EFFECTS OF AMINO ACID & CARNITINE SUPPLEMENTATION DURING SWIM TRAINING ON IMMUNE STATUS II. Med Sci Sports Exerc 1992. [DOI: 10.1249/00005768-199205001-00007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
Within 6 months, a 10-member Nursing Services task force created and administered a literature-based retention survey. Tool development and administration is described. The 33-item tool was completed by 85% of the staff. Responses led to the formation of work groups, charged with addressing dissatisfiers and communicating implementation strategies to the hospital at large.
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Affiliation(s)
- A Ames
- Vanderbilt Hospital and Clinic, Nashville, Tennessee
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Longnecker DL, Menninger RW, Gentry J. Psychiatric services in a managed care world. Health Syst Rev 1991; 24:19, 22, 24-7. [PMID: 10128628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Gentry J. Secret to success: retiree volunteers. Volunt Leader 1990; 30:11-2. [PMID: 10293525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Barnwell M, Gentry J, Roberts J. Nurses care for computers. Nurs Times 1984; 80:61-2. [PMID: 6561560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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Gentry J. Creative computing: the faith factor. Health Soc Serv J 1983; 93:809. [PMID: 10263736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Lim FF, Barnett J, Bright A, Chaput MP, Cox C, Floyd DM, Gentry J, Thrashe J, Washbon EC. Extraction of Light Filth from Tea: Collaborative Study. J AOAC Int 1981. [DOI: 10.1093/jaoac/64.2.287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
The present AOAC method for determining insect and rodent filth in tea is time-consuming because it produces filter papers which are heavy in plant residue and therefore requires long paper-reading times. Anew method for the analysis of light filth in tea was developed to remedy existing problems and to improve recoveries. The method consists of the following steps: sample preparation, wet sieving, dilution with 40% isopropanol, extraction with Tween 80-Na4EDTA-40% isopropanol, flotation with mineral oil-heptane, and trapping off in a Wildman trap flask. In an interlaboratory collaborative study, analysts reported combined insect fragment recoveries of 99.2% for the proposed method and 93.0% for the AOAC method; the same analysts recorded combined rodent hair recoveries of 92.2% for the proposed method and 47.6% for the official method. Average times for reading individual subsamples were 9 min for the proposed method and 27 min for the AOAC method. The proposed method has been adopted official first action.
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Affiliation(s)
- Faith F Lim
- Food and Drug Administration, 850 Third Ave, Brooklyn, NY 11232
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Lim FF, Barnett J, Bright A, Chaput MP, Cox C, Floyd DM, Gentry J, Thrasher J, Washbon EC. Extraction of light filth from tea: collaborative study. J Assoc Off Anal Chem 1981; 64:287-90. [PMID: 7228825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The present AOAC method for determining insect and rodent filth in tea is time-consuming because it produced filter papers which are heavy in plant residue and therefore required long paper-reading times. A new method for the analysis of light filth in tea was developed to remedy existing problems and to improve recoveries. The method consists of the following steps: sample preparation, wet sieving, dilution with 40% isopropanol, flotation with mineral oil-heptane, and trapping off in a Wildman trap flask. In an interlaboratory collaborative study, analysts reported combined insect fragment recoveries of 99.2% for the proposed method and 93.0% for the AOAC method; the same analysts recorded combined rodent hair recoveries of 92.2% for the proposed method and 47.6% for the official method. Average times for reading individual subsamples were 9 min for the proposed method and 27 min for AOAC method. the proposed method has been adopted official first action.
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Abstract
This paper describes a series of young patients hospitalized in a psychiatric facility because they presented symptoms indicative of a psychotic disorder when, in fact, the youngsters were dealing with the strain of keeping a family secret hidden. Case presentation oriented to how the burden prohibited proper psychological development and the manner of how these secrets came to light are offered. The commonality of patients exhibiting this phenomenon is discussed.
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Cushman M, Gentry J, Dekow FW. Condensation of imines with homophthalic anhydrides. A convergent synthesis of cis- and trans-13-methyltetrahydroprotoberberines. J Org Chem 1977; 42:1111-6. [PMID: 845705 DOI: 10.1021/jo00427a001] [Citation(s) in RCA: 109] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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