Relevant bibliographies by topics / F substance

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'F substance'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'F substance.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "F substance"

1

Kornely, Dominique, and Kameko Halfmann. "Psychosocial Stress and Attitudes Toward Substance Use Among College Students: An Exploratory Study." Psi Chi Journal of Psychological Research 25, no. 4 (2020): 338–48. http://dx.doi.org/10.24839/2325-7342.jn25.4.338.

Full text
Abstract:
Substance use occurs on college campuses nationwide and is among the top threats to college-student health. The present study aimed to explore the impact of stress on substance use attitudes. The independent variable was acute psychosocial stress, induced using the Trier Social Stress Test. We measured chronic stress using the Adverse Childhood Experiences questionnaire. The Alcohol Purchase Task (i.e., alcohol demand, alcohol breakpoint, alcohol expenditure) and the Cognitive Appraisal of Risky Events-Revised questionnaire (i.e., expected involvement with substances and expected benefits and consequences of using substances) were the dependent variables. We predicted that participants who completed the acute stress task would report greater attitudes toward substance use behaviors and this would be more pronounced for those with higher levels of chronic stress. Acute stress did not affect willingness to pay for alcohol, F(3, 85) = 0.55, p = .65, ηp2 = 0.02, or expected positive or negative consequences from engaging in substance use, F(3, 85) = 0.44, p = .73, ηp2 = 0.02. There was a small positive association between chronic stress, as measured by adverse childhood experiences, and expected use, ρ(89) = .22, p = .04. In exploratory analyses, we found expected positive benefits of substance use to be significantly associated with expected future involvement, whereas expected negative consequences of substance use was associated with expected future involvement. Our results imply that acute and chronic stress were not significant in predicting substance use behaviors. Rather, those who expect benefits are more likely to use substances.
APA, Harvard, Vancouver, ISO, and other styles
2

Toledo-Fernández, Aldebarán, Luis Villalobos-Gallegos, and Rodrigo Marín-Navarrete. "Is the Mini-Mental State Examination (MMSE) useful for eligibility screening of research participants with substance use disorder?" Revista Internacional de Investigación en Adicciones 2, no. 1 (January 1, 2016): 39–44. http://dx.doi.org/10.28931/riiad.2016.1.06.

Full text
Abstract:
Introduction: the MMSE is used for eligibility screening of potential research participants diagnosed with substance use disorder (SUD), as abilities needed to provide a valid informed consent or accurate information could be impaired in these clinical populations. Knowledge about the capacity of the MMSE to detect impairment in these abilities or at least to assess impact of SUD on its total score, however, is rather diffuse. This has important ethical and methodological implications. Objective: to analyze effects of SUD only, main substances of abuse, age of onset of substance use, recent substance use, and psychiatric comorbidity upon MMSE outcome. The overall purpose of the study was to assess the utility of the MMSE for eligibility screening of potential research participants with SUD. Method: individuals were recruited from residential facilities for substance use treatment. A demographic questionnaire, MMSE and Mini International Neuropsychiatric Interview were used. Results: A total of 601 participants were gathered for main analysis. Controlling for education, no differences in MMSE score were detected within main substances of abuse (F=1.25[4,529], p=.28), nor between SUD only versus SUD with psychiatric comorbidity (F=.58[1,597], p=.44). Effects of age of onset and recent use of specific substances upon MMSE score were also absent. Discussion and conclusions: If there is some cognitive impairment in this clinical population, it may not be pertinently assessed by the MMSE, thus casting doubt on its pertinence for eligibility screening.
APA, Harvard, Vancouver, ISO, and other styles
3

Agzamova, Manzura Adkhamovna, Ravshanjon Muratjanovich Khalilov, and Abdulaziz Adilkhanovich Janibekov. "СHROMATOGRAPHIC ANALYSIS OF СYCLOSIVERSIOSIDE F." chemistry of plant raw material, no. 2 (June 10, 2021): 267–74. http://dx.doi.org/10.14258/jcprm.2021028314.

Full text
Abstract:
The plants Astragalus pterocephalus growing in Uzbekistan are a source of triterpene glycosides. The main triterpene glycoside, in terms of content, is a cycloartan glycoside – cyclosiversioside F. To obtain an individual biologically active compound cyclosiversioside F with 95% purity, a proposed method involves extraction with methanol, concentration and dilution with an equal volume of water, then followed by a sequential extraction from the aqueous extract with chloroform, ethyl acetate and butanol. Then a chromatographic separation of the purified amount of extractives on a column with silica gel, isolation of the substance and precipitation from a solvent system must be performed, followed by recrystallization and drying. The optimal conditions for the isolation and separation of the amount of extractive substances have been developed in order to obtain an individual glycoside. Cyclosiversioside F was authenticated by TLC in comparison with an authentic sample. Quantitative analysis of the glycoside was carried out by HPLC. The purity of cyclosiversioside F was confirmed by taking 1H and 13C NMR spectra.
APA, Harvard, Vancouver, ISO, and other styles
4

Stoolmiller, Mike, and Elaine A. Blechman. "Substance Use is a Robust Predictor of Adolescent Recidivism." Criminal Justice and Behavior 32, no. 3 (June 2005): 302–28. http://dx.doi.org/10.1177/0093854804274372.

Full text
Abstract:
How well does substance use predict adolescent recidivism? When the Cox proportional hazards model was applied to officially recorded first rearrest of 505 juvenile offenders, a best-fitting complex multivariate model indicated that: (a) parent reports that youths “often” use substances more than doubles first rearrest risk, (b) averaged youth and parent substance use reports predict recidivism better than a single source, (c) parent or youth denial of youth substance use predicts recidivism, (d) age at first arrest does not predict recidivism, (e) non-White/non-Asians have a 79% higher recidivism risk than peers, (f) parent-reported delinquency predicts recidivism with declining accuracy, and (g) substance use robustly predicts recidivism despite prior reported delinquency, gender, ethnicity, age, follow-up time, or data source. Findings are related to host-provocation theory.
APA, Harvard, Vancouver, ISO, and other styles
5

Leghari, Naeem Ullah, Zakia Bano, Zoofishan Ahmad, and Bushra Akram. "SUBSTANCE USE DISORDER." Professional Medical Journal 25, no. 02 (February 10, 2018): 325–31. http://dx.doi.org/10.29309/tpmj/2018.25.02.466.

Full text
Abstract:
Introduction: In the present study social support will be defined in order tofind its moderating role in depression among people with substance use disorder. Objectives:The Objective of the study was to explore that stigma is a significant predictor of depressionin people with substance used disorder. Further, the study aim was to explore the significantrole of perceived social support in depression among the people with substance use disorder.Study Design: Sample was collected through purposive sampling technique. Setting, Period:Sample was gathered from different treatment and rehabilitation centers situated across Sialkot andMultan from August 2015 to June 2016. Material & Methods: Sample included 200 maleswith substance used disorder between age range of 20 to 50 (Mean age = 31.34, S.D = 7.988)were assessed on perceived stigma of substance abuse scale (Loma, O’ Hair, Knollenberg, Hayes,& Fletcher, 2010) and Saddiqui Shah Depression Scale (Shah, 1992). Regression analysis wasapplied to analyze the hypotheses. Results: The results reflected significant relationship ofperceived stigma and depression (r= .464; F (54.275), p<.001; R²=.215]. Resultshows perceived social support as a moderator between stigma and depression among peoplewith substance use disorder (r =.565; F (46.138), p<.001; R2=319]. Conclusion: Stigmatizingattitude of significant others in people with substance use disorder is increasing the negativefeelings among people with substance use disorder. Perception of this blaming attitude byother causes a deep effect on them and they suffer depression. Further, the Perception of socialsupport from others plays a momentous role in the lives of people it is helpful to cope all theproblems.
APA, Harvard, Vancouver, ISO, and other styles
6

Benkovits, J., P. Polgár, Á. Fábián, P. Czobor, I. Bitter, and J. Réthelyi. "The effect of DTNBP1 and comt risk variants and comorbid drug-abuse in patients with schizophrenia: A Gene-Environment Interaction?" European Psychiatry 26, S2 (March 2011): 1345. http://dx.doi.org/10.1016/s0924-9338(11)73050-4.

Full text
Abstract:
IntroductionEarlier studies have shown that candidate gene risk polymorphisms and psychoactive substance abuse influence the frequency and severity of psychosis.ObjectivesIn this study we examined whether the most studied schizophrenia risk polymorphisms and psychoactive substance abuse interact in their influence on symptom severity and neurocognition.MethodsWe analyzed the clinical data of 280 schizophrenia patients, including genotyping data of the candidate genes NRG1, DTNBP1, RGS4, G72/G30 and PIP5K2A. Patients were assessed clinically by the Positive and Negative Symptom Scale (PANSS) and information about substance abuse was based on self-report and reviewing patient charts. We tested for possible interactional effects using the General Linear Model (GLM) analysis.Results15,8% of patients reported episodic or regular substance abuse, the vast majority (92%) used cannabis or the combination of cannabis and another drug. Substance abuse was associated with higher scores of the PANSS hostility/excitement factor, independent of sex, age, or genetic results (F = 4,02;p = 0,04). We found significant interactional effects of the DTNBP1 gene risk polymorphisms and substance abuse on different PANSS factors: rs2619528 and positive substance abuse interaction were associated with higher scores on the PANSS negative factor (F = 4,6;p = 0,03), and the PANSS depression factor (F = 4,75;p = 0,03). Moreover the rs3213207 - substance abuse interaction was associated with higher scores on the PANSS cognitive factor (F = 7,55;p = 0,006). Carriers of the Val allele of the COMT Val158Met polymorphism demonstrated significantly higher scores on the PANSS depression factor (F = 5,53;p = 0,02).ConclusionsOur results underscore the importance of gene-environment interactions in the phenotypic heterogeneity of schizophrenia.
APA, Harvard, Vancouver, ISO, and other styles
7

Lewis, Todd F., and A. Keith Mobley. "Substance Abuse and Dependency Risk: The Role of Peer Perceptions, Marijuana Involvement, and Attitudes toward Substance Use among College Students." Journal of Drug Education 40, no. 3 (September 2010): 299–314. http://dx.doi.org/10.2190/de.40.3.f.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Stanton, Amelia M., Abigail W. Batchelder, Norik Kirakosian, James Scholl, Dana King, Chris Grasso, Jennifer Potter, Kenneth H. Mayer, and Conall O’Cleirigh. "Differences in mental health symptom severity and care engagement among transgender and gender diverse individuals: Findings from a large community health center." PLOS ONE 16, no. 1 (January 25, 2021): e0245872. http://dx.doi.org/10.1371/journal.pone.0245872.

Full text
Abstract:
Mental health disparities among transgender and gender diverse (TGD) populations have been documented. However, few studies have assessed differences in mental health symptom severity, substance use behavior severity, and engagement in care across TGD subgroups. Using data from the electronic health record of a community health center specializing in sexual and gender minority health, we compared the (1) severity of self-reported depression, anxiety, alcohol use, and other substance use symptoms; (2) likelihood of meeting clinical thresholds for these disorders; and (3) number of behavioral health and substance use appointments attended among cisgender, transgender, and non-binary patients. Participants were 29,988 patients aged ≥18 who attended a medical appointment between 2015 and 2018. Depression symptom severity (F = 200.6, p < .001), anxiety symptom severity (F = 102.8, p < .001), alcohol use (F = 58.8, p < .001), and substance use (F = 49.6, p < .001) differed significantly by gender. Relative to cisgender and transgender individuals, non-binary individuals are at elevated risk for depression, anxiety, and substance use disorders. Gender was also associated with differences in the number of behavioral health (χ2 = 51.5, p < .001) and substance use appointments (χ2 = 39.3, p < .001) attended. Engagement in treatment among certain gender groups is poor; cisgender women and non-binary patients assigned male at birth were the least likely to have attended a behavioral health appointment, whereas transgender men and cisgender women had attended the lowest number of substance use appointments. These data demonstrate the importance of (1) assessing gender diversity and (2) addressing the barriers that prevent TGD patients from receiving affirming care.
APA, Harvard, Vancouver, ISO, and other styles
9

Donnelly, Joseph, Michael Young, Rebecca Pearson, Tina M. Penhollow, and Aida Hernandez. "Area Specific Self-Esteem, Values, and Adolescent Substance Use." Journal of Drug Education 38, no. 4 (December 2008): 389–403. http://dx.doi.org/10.2190/de.38.4.f.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Chepurnov, S. A., N. E. Chepurnova, E. Paschali, N. Yu Panteleev, and I. P. Ashmarin. "Substance P and brain functional lateralization." Regulatory Peptides 37 (September 1992): S45. http://dx.doi.org/10.1016/0167-0115(92)90900-f.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "F substance"

1

Militon, Christian. "La metallogenie polyphasee a zn-pb-ba-f et mg-fe de la region de gedre-gavarnie-barroude (hautes-pyrenees)." Orléans, 1987. https://tel.archives-ouvertes.fr/tel-00798146.

Full text
Abstract:
Une prospection geologique systematique de ces terrains a conduit a la reconnaissance de quatre principaux types de mineralisations dans le socle, le devonien inferieur et le cretace : 1 - une mineralisation stratiforme a zn-pb-ba-f de type sedimentaire - exhalatif omnipresente au sommet de la barre calcaire emsienne (devonien inferieur). 2 - de nombreux filons de types b. P. G. C. A gangue de siderite avec, pour certains, presence importante de barytine ou de fluorine ; ces filons correspondent a une phase de mineralisation tardi-hercynienne, probablement en liaison avec une phase tectonique compressive impliquant un contexte decrochant a composante cisaillante senestre, evoluant progressivement vers une distension nord-sud. 3 - des amas metasomatiques a mg-fe dans la barre calcaire emsienne, pouvant representer le sommet du systeme hydrothermal responsable des filons tardi-hercyniens du socle. 4 - la dissemination de galene dans les calcaires du santonien et de petits amas decimetriques de barytine secants sur la dolomie greseuse du cenomanien ; ces indices traduisent la remobilisation de filons tardi-hercyniens principalement d'apres l'identite des compositions isotopiques du plomb.
APA, Harvard, Vancouver, ISO, and other styles
2

Seifert, Vico. "Lernfabrik Industrielle Bauteilreinigung - Angewandte F&E am Beispiel einer inlinefähigen Detektion lackbenetzungsstörender Substanzen." Fraunhofer-Institut für Verfahrenstechnik und Verpackung IVV, 2018. https://slub.qucosa.de/id/qucosa%3A31783.

Full text
Abstract:
An LKW-Achsen werden hohe Anforderungen an Sauberkeit und Lackhaftung gestellt. Lackbenetzungsstörende Substanzen (LBS) müssen deshalb vor dem Lackierprozess entfernt werden. Ohne eine inlinefähige 100%-Kontrolle auf LBS können die Qualitätsanforderungen nicht erreicht werden. Am Beispiel einer inlinefähigen Detektion von LBS wird auf die Vorgehensweise bei F&E-Projekten des Fraunhofer IVV eingegangen: Anpassung des Messsystems an den Anwendungsfall, Erprobung der Messung am realen Objekt, Erstellung von Konzepten zur Umsetzung der Mess- und Kontrollaufgabe, Integration des Detektionsmoduls in die Fertigungslinie
APA, Harvard, Vancouver, ISO, and other styles
3

Šimková, Markéta. "Posouzení bezpečnosti čerpací stanice pohonných hmot." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228345.

Full text
Abstract:
Safety study of refuelling station. Diploma thesis, Institute of Metrology and Quality Assurance Testing, Brno University of Technology. This Diploma thesis deal with quantitative risk assessment of exposure. It means for population, animals and environment stocking, transport and manipulation with vairous fuel at refuelling station in particular area and influence of other industrial effects in close area of this refuelling station. There is more specified a Method of Dow´s fire and explosion Index, method of Guidelines for Quantitative Risk Assessment and method FMEA (Failure Mode and Effect Analysis).
APA, Harvard, Vancouver, ISO, and other styles
4

Wurzbacher, Michael Verfasser], Werner [Akademischer Betreuer] Back, and Rudi F. [Akademischer Betreuer] [Vogel. "Untersuchungen zum Einfluss antioxidativer Substanzen auf die Geschmacksstabilität des Bieres / Michael Wurzbacher. Gutachter: Rudi F. Vogel. Betreuer: Werner Back." München : Universitätsbibliothek der TU München, 2011. http://d-nb.info/1019588489/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Trantzschel, Thomas [Verfasser], and Johannes [Akademischer Betreuer] Bernarding. "Parawasserstoffinduzierte Kernspinpolarisation an biologisch relevanten Substanzen zur Signalsteigerung ind der 1 H- und 19 F-NMR und MRT / Thomas Trantzschel. Betreuer: Johannes Bernarding." Magdeburg : Universitätsbibliothek, 2014. http://d-nb.info/1054638349/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Tennhardt, Lars. "Potenzial technischer Abwasser- und Klärschlammbehandlungsverfahren zur Elimination endokrin aktiver Substanzen /." Pirna : Forum für Abfallwirtschaft und Altlasten, 2004. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=013208477&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Gallenkemper, Martin. "Verhalten endokrin wirksamer Substanzen bei der Nanofiltration von wässrigen Medien /." Aachen : Shaker, 2005. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014156408&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Wintgens, Thomas. "Modellierung von Membranbioreaktoren für die Abwasserbehandlung unter Berücksichtigung endokrin wirksamer Substanzen /." Aachen : Mainz, 2005. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014901159&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Christ-Kohlrausch, Friederike. "Unterschiede im Transfer von Zytokininduzierenden Substanzen (CIS) über High-Flux Dialyse Membranen /." Berlin : Grauer Verl, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014908426&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Gehring, Martin. "Verhalten der endokrin wirksamen Substanz Bisphenol A bei der kommunalen Abwasserentsorgung /." Pirna : Forum für Abfallwirtschaft und Altlasten, 2004. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=017472748&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "F substance"

1

F, Christiane. Zoo Station: The story of Christiane F. [memoir]. San francisco, CA: Zest Books, 2013.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Inciardi, James A. Cocaine-exposed infants: Social, legal, and public health issues. Thousand Oaks, Calif: Sage Publications, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Office, General Accounting. Pipeline safety: Actions taken to improve the program : fact sheet for the Honorable Bruce F. Vento, House of Representatives. Washington, D.C: The Office, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

United States. National Transportation Safety Board. Railroad accident report: Derailment of Seaboard System Railroad train no. F-690 with hazardous material release, Jackson, South Carolina, February 23, 1985 and collision of Seaboard System Railroad train no. F-481 with standing cars, Robbins, South Carolina, February 25, 1985. Washington, D.C: The Board, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

United States. National Transportation Safety Board. Railroad accident report: Derailment of Seaboard System Railroad train no. F-690 with hazardous material release, Jackson, South Carolina, February 23, 1985 and collision of Seaboard System Railroad train no. F-481 with standing cars, Robbins, South Carolina, February 25, 1985. Washington, D.C: The Board, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Guerrero, Peter F. Lawn care pesticide risks remain uncertain while prohibited safety claims continue: Statement of Peter F. Guerrero, Associate Director, Environmental Protection Issues, Resources, Community, and Economic Development Division, before the Subcommittee on Toxic Substances, Environmental Oversight, Research and Development Committee on Environment and Public Works, United States Senate. [Washington, D.C.]: The Office, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

A clinical guide to reproductive and developmental toxicology. Boca Raton, Fla: CRC Press, 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Namita, Wahi. Part VII Rights—Substance and Content, Ch.52 Property. Oxford University Press, 2016. http://dx.doi.org/10.1093/law/9780198704898.003.0052.

Full text
Abstract:
This chapter examines the fundamental right to property as an important, albeit contentious, provision in the Indian Constitution. It considers Article 19(1)(f) of the Constitution, which guaranteed to all citizens the fundamental right to ‘acquire, hold and dispose of property’. It considers the shifts and continuities concerning this right in India, in both colonial and Independent India. It analyses case law relating to agrarian reform under the First, Fourth, and Seventeenth Amendments (Article 31(4) and (6), Articles 31A and 31B). It also assesses the laws within the scope of Article 31(2) needed to satisfy the requirements of public purpose and compensation. It concludes by commenting on the abolition of the fundamental right to property through the Forty-fourth Constitutional Amendment, as well as attempts to reinstate this right in the Indian Constitution.
APA, Harvard, Vancouver, ISO, and other styles
9

F, Christiane. Zoo Station: The Story of Christiane F. Lerner Publishing Group, 2013.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Center for Substance Abuse Prevention (U.S.), ed. Supplementary administration manual for the expanded female version of the Addiction Severity Index (ASI) instrument, the ASI-F. Rockville, Md. (Rockwall II Building, 5600 Fishers Lane, Rockville 20857): U.S. Dept. of Health and Human Services, Substance Abuse and Mental Health Services Administration, Center for Substance Abuse Prevention, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "F substance"

1

McKeganey, Neil. "f." In A–Z of Substance Misuse and Drug Addiction, 57–59. London: Macmillan Education UK, 2014. http://dx.doi.org/10.1007/978-1-137-31923-4_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

"2H-Benzo[f]isoindole." In Substance Index, edited by Backes, Fröhlich, and Padeken. Stuttgart: Georg Thieme Verlag, 2000. http://dx.doi.org/10.1055/b-0035-114531.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

"1,4,5,8-Tetrahydro-pyrazolo[3,4-f]indazole." In Substance Index, edited by Backes, Fröhlich, and Padeken. Stuttgart: Georg Thieme Verlag, 2000. http://dx.doi.org/10.1055/b-0035-114526.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

"5,7-Dihydro-2H-λ6-Thieno[3,4-f]-1,3-benzodioxole." In Substance Index, edited by Backes, Fröhlich, and Padeken. Stuttgart: Georg Thieme Verlag, 2000. http://dx.doi.org/10.1055/b-0035-114524.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

"Benzo[f]naphtho[2,1-c]cinnoline (22) to 13H-Di[1,4]benzothiazino[2,3-a:3,2-d]cycloheptatriene (23)." In Substance index, edited by Backes, Fröhlich, and Padeken. Stuttgart: Georg Thieme Verlag, 2002. http://dx.doi.org/10.1055/b-0035-114928.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

"[3′,2′:2,3]-Pyrylio-18-nor-androsta-2,13-diene (21) to 8,13-Dihydronaphtho[2′,3′:4,5]furo[3,2-f]quinoline (21)." In Substance index, edited by Backes, Fröhlich, and Padeken. Stuttgart: Georg Thieme Verlag, 2002. http://dx.doi.org/10.1055/b-0035-114924.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

"7,12-Dihydronaphtho[2′,3′:4,5]furo[2,3-f]quinoline (21) to 7,8-Dihydronaphtho[1′,8′:5,6,7]oxepino[3,2-b]indole (21)." In Substance index, edited by Backes, Fröhlich, and Padeken. Stuttgart: Georg Thieme Verlag, 2002. http://dx.doi.org/10.1055/b-0035-114925.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

"6.6.6.6.7, 3S,2N: Triphenyleno[2,3-f][1,3(λ5),5,2,4]trithiadiazepine (23) to 2β,3β-Epoxy-9β,19-cyclo-cholest-6-ene (19)." In Substance index, edited by Backes, Fröhlich, and Padeken. Stuttgart: Georg Thieme Verlag, 2002. http://dx.doi.org/10.1055/b-0035-114929.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

"4.5.6.6.7, 2N: 1,2,3,3a,8,12b,12c-Octahydrodibenzo[b,f]pyrrolo[3′,4′:3,4]cyclobuta[1,2-d]azepine, Dibenzo-4,12-diazatricyclo[5.5.0.02,6]dodeca-8,11-diene (20) to Isocorrole (23)." In Substance index, edited by Backes, Fröhlich, and Padeken. Stuttgart: Georg Thieme Verlag, 2002. http://dx.doi.org/10.1055/b-0035-114917.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

"Ketene-F,F-Acetals (I)." In Substance index : from the 4th edition and the additional and supplementary volumes to the 4th edition, edited by Backes, Fröhlich, and Padeken. Stuttgart: Georg Thieme Verlag, 2000. http://dx.doi.org/10.1055/b-0035-114347.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "F substance"

1

Sasco, Elena. "Influența restricțiilor hidrice asupra fungului Fusarium Solani Var. Coeruleum." In International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.75.

Full text
Abstract:
The article presents data on the influence of water restrictions on the fungi Fusarium solani var. coeruleum. The considerable decrease of the share of the strain factor from 68.88% to 16.97% for F. solani, denotes the high survival capacity of the fungus in conditions of osmotic restrictions produced by the osmotic substance PEG, thus confirming the data from the literature. The spread of the mycelium in the form of plaque or film, the intensity of pigmentation, the presence of aerial mycelium show changes in the adaptation of the fungus to osmotic conditions, which have significantly affected the growth of F. solani.
APA, Harvard, Vancouver, ISO, and other styles
2

Kodama, K., O. Larm, P. Olsson, B. Pasehe, J. Risenfeldt, and J. Swedenborg. "ANTITHROMBIN III BINDING TO IMMOBILIZED HEPARIN FRAGMENTS AND ITS RELATION TO F XA INHIBITION." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643091.

Full text
Abstract:
Covalent end-point attachment of heparin fragments (8 000 daltons) to artitifical materials results as published before in a highly thromboresistant surface. Approximately one out of six bonded fragments carry the antithrombin III (AT) binding sequence. i.e. the high affinity site. With regard to thrombin inhibition the heparin surface resembles the endothelium. The present work deals with the uptake on the immobilized heparin and its significance for F Xa inhibition. The uptake of AT was studied at 0.15 M and 0.35 M NaCl concentration (TRIS buffer, pH 7.4) respectively and determined as disappearance of AT activity in the exposed solutions. Large amounts were adsorbed at 0.15 M and the uptake was both concentration and time dependent. At 0.35 M the uptake was the same at all the tested AT concentrations: 5 pico-moles/square cm. It was deduced that mainly high affinity sites had taken up AT at 0.35 M and that both high and low affinity sites had taken up AT at 0.15 M.The non-AT-adsorbed heparin surface did not induce inhibition of F Xa (in TRIS buffer solution) after exposure. The surface AT-adsorbed at 0.15 M induced F Xa inhibition with the same rate in several consecutive exposed aliquots. The surface AT-adsorbed at 0.35 M had a lower inhibitory capacity and only the first F Xa aliquot was inhibited at the same rate as on the surface AT-adsorbed at 0.15 M. The inhibition rate for a second aliquot was slowlier due to the facts that AT had been consumed and that the density of AT on high affinity sites had decreased. It is concluded that AT on high affinity sites determines the rate at which F Xa is inhibited whereas the amount of AT on low affinity sites determines the inhibitory capacity by continously providing the high affinity sites with AT. The migration of AT must take place horizontally in the 100-200 A thick surface layer and may mimic events happening on a cellular membrane with binding sites of different classes for a substance.
APA, Harvard, Vancouver, ISO, and other styles
3

Huffer, Marika, and Anita Cservenka. "Effects of Age and Sex on Primary Method and Form of Cannabis Use." In 2020 Virtual Scientific Meeting of the Research Society on Marijuana. Research Society on Marijuana, 2021. http://dx.doi.org/10.26828/cannabis.2021.01.000.6.

Full text
Abstract:
While cannabis is the most commonly used illicit substance, few studies have focused on the relationship between sociodemographic factors and primary method or form of cannabis use. The primary aims of this study were to understand the effects of age and sex on primary form (marijuana, concentrates, edibles) and method (joints, blunts, hand pipe, bong, hookah, vaporizer, edibles) of cannabis use. Participants (n=852; n=536 male) completed an online survey that included the ‘Daily Sessions, Frequency, Age of Onset, and Quantity of Cannabis Use Inventory’ used to collect information on the primary method and form of cannabis use in male and female participants divided into young adults ages 18 to 25 (Y) and adults 26 and older (O). Chi square analysis showed a significant effect of sex for primary method (χ2 (1)=122.4, p<.001) and primary form (χ2 (1)=24.6, p<.001) of cannabis use. Post hoc comparisons using Bonferroni corrections (adjusted p=0.002) showed that males were significantly more likely to report blunts (M=35%; F=10%), while females were significantly more likely to report joints (F=16%; M=8%) and edibles (F=15%; M=4%) as their primary method of cannabis use. Males were also significantly more likely to report marijuana (M=66%; F=55%), while females were significantly more likely to endorse edibles (F=17%; M=10%) as their primary form of cannabis use. Chi square analysis showed a significant effect of age for primary method (χ2 (1)=139.9, p<.001) of cannabis use. Young adults were significantly more likely to report using bongs (Y=19%; O=11%), vaporizers (Y=26%; O=9%), and edibles (Y=12%; O=5%), while participants 26 or older were significantly more likely to report using blunts (O=39%; Y=10%) as their primary method of cannabis use. There were no significant differences between age groups for the primary form of cannabis use. Findings from this study suggest there are significant effects of age and sex on primary method and form of cannabis use. Future studies should examine how other sociodemographic factors may affect cannabis use and how method and form of cannabis use affect long-term health outcomes.
APA, Harvard, Vancouver, ISO, and other styles
4

Ng, Jun Hong Clarence, Tariq Almubarak, and Hisham A. Nasr-El-Din. "Seed Extracts as Natural, Green, Non-Toxic Corrosion Inhibitors." In SPE Trinidad and Tobago Section Energy Resources Conference. SPE, 2021. http://dx.doi.org/10.2118/200935-ms.

Full text
Abstract:
Abstract Acid treatments are commonly used in the oilfield to remove inorganic scale or to stimulate formatio ns. These treatments typically consist of using hydrochloric acid (HCl), acetic acid, formic acid, or chelating agents. At elevated temperatures, these acids are highly corrosive and can cause severe damage to tubulars as well as downhole equipment. To reduce damage from these acids, corrosion inhibitors are added to the treatment solution. Corrosion inhibitors used in the oil and gas industry are typically quaternary amines or sulfur-containing compounds. These compounds adsorb to the surface of the metal, thereby reducing contact between the metal surface and the corrosive substance. However, these corrosion inhibitors are damaging to the environment and harmful to human health. Alternative new environmentally-friendly corrosion inhibitors are also either toxic to the human body or face performance limitations at higher temperature field applications. To develop new environmentally friendly and non-toxic corrosion inhibitors for high-temperature applications, 15 edible seeds were tested as alternative sources of corrosion inhibitors. In order to determine the inhibition effect of 15 different seeds, N-80 and S13Cr coupons were exposed to 15 wt.% HCl solutions at temperatures between 77-250°F with 2 wt.% of grounded seed added for 6 hours. In addition, a control solution containing no corrosion inhibitor was used to establish a corrosion rate for a base case. This paper will show the results of such seeds and attempt to provide an awareness of natural seeds extract for use as corrosion inhibitors in conjunction with well acid treatments. It was noted that out of the 15 seeds, seeds 1 and 2 were found to perform the best at these conditions, exhibiting more than 90% corrosion inhibition efficiency. Seed 4 was observed to perform the worst, exhibiting only 16.8% inhibition efficiency. At 150°F, 2 wt.% of seeds 1 and 2 were tested with seed 1 achieving a corrosion rate of 0.00253 lb/ft2 while seed 2 was unable to provide sufficient inhibition with a corrosion rate of 0.153 lb/ft2. The control solution was found to have a corrosion rate of 0.371 lb/ft2 over the 6 hours at 150°F. Seed 1 was further tested at 200°F with the addition of corrosion inhibitor intensifiers and resulted in a corrosion rate of 0.00087 lb/ft2, while at 250°F, a corrosion rate of 0.00811 lb/ft2 was observed. The tests using S13Cr also showed that seed 1 worked well as a corrosion inhibitor for CRAs. The thermal degradation of seed 1 was also examined using NMR. These results show a new naturally occurring, green, non-toxic, high-temperature applicable corrosion inhibitor that can be developed from edible seeds.
APA, Harvard, Vancouver, ISO, and other styles
5

Horváth, Imre, and György Kuczogi. "Physical Modeling of Mechanical Objects of Constrained Movement." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/cie-4271.

Full text
Abstract:
Abstract Presented is a computational method for physical modeling of mechanical objects of constrained movement. In a physical modeling environment, an object’s behavior is modeled as it is implied by its geometry and substance, and the appearing physical (mechanical, thermal, and other) phenomena. The developed software is able to describe various forms of movement of a rigid object, configure obstacles in the space, check for collisions of the moving object with the obstacles, and compute post-collision trajectories of the object. The motivation for the background research is an industrial problem, namely, spatial positioning of moving objects without using extra energy. The novelty of this work is in (a) the interactive definition of constituents of the modeling environment, (b) the integrated simulation of an arbitrary sequence of spatial movements and multiple collisions, and (c) the applicability to preliminary design of mechanical equipment. The process of physical modeling has been implemented in six phases: (a) geometric modeling and determination of the substantial attributes of the object, (b) computing of the pre-defined movements, (c) specification and positioning obstacles in the space, (d) checking for single and multiple collisions, (e) computing of post-collision movements, and (f) controlling of multiple and repeated events. Among others, the developed software is able to compute compound movements in the space and any sequence of eccentric collisions with four types of obstacles.
APA, Harvard, Vancouver, ISO, and other styles
6

McDermott, Mary D., Charles D. Griffin, Daniel K. Baird, Carl E. Baily, John A. Michelbacher, Kenneth E. Rosenberg, and S. Paul Henslee. "Completion of Experimental Breeder Reactor-II Sodium Processing at Argonne National Laboratory." In 10th International Conference on Nuclear Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/icone10-22485.

Full text
Abstract:
The Experimental Breeder Reactor - II (EBR-II) at Argonne National Laboratory - West (ANL-W) was shutdown in September 1994 as mandated by the United States Department of Energy. Located in eastern Idaho, this sodium-cooled reactor had been in service since 1964, and was a test facility for fuels development, materials irradiation, system and control theory tests, and hardware development. The EBR-II termination activities began in October 1994, with the reactor being maintained in an industrially and radiologically safe condition for decommissioning. With the shutdown of EBR-II, its sodium coolant became a waste necessitating its reaction to a disposal form. A Sodium Process Facility (SPF), designed to convert sodium to 50 wt% sodium hydroxide, existed at the ANL-W site, but had never been operated. The SPF was upgraded to current standards and codes, and then modified in 1998 to convert the sodium to 70 wt% sodium hydroxide, a substance that solidifies at 65°C (150°F) and is acceptable for burial as low level radioactive waste in Idaho. In December 1998, the SPF began operations. Working with sodium and highly concentrated sodium hydroxide presented some unique operating and maintenance conditions. Several lessons were learned throughout the operating period. Processing of the 330 m3 (87,000 gallons) of EBR-II primary sodium, 50 m3 (13,000 gallons) of EBR-II secondary sodium, and 290 m3 (77,000 gallons) of Fermi-1 primary sodium was successfully completed in March 2001, ahead of schedule and within budget.
APA, Harvard, Vancouver, ISO, and other styles
7

Shurupova, М. N., V. S. Shurupov, and R. S. Romanets. "To the resource study of the Rosaceae plants with antiviral activity in Southern Siberia." In Problems of studying the vegetation cover of Siberia. TSU Press, 2020. http://dx.doi.org/10.17223/978-5-94621-927-3-2020-48.

Full text
Abstract:
The survey is directed at revealing of the natural reserves of 9 species of Rosaceae family in the Southern Siberia: Agrimonia pilosa Ledeb., Alchemilla vulgaris L. s.l., Filipendula ulmaria (L.) Maxim., F. vulgaris Moench., F. stepposa Juz., and Pentaphylloides fruticosa (L.) O. Schwarz. Raw materials of these species are considered as a strategically important source of biologically active substances with antiviral activity being perspective for pharmaceutic branch. For habitats from some regions of Southern Siberia, the resource indicators of these species are given, such as the coefficient of shrinkage, productivity, area of thickets and biological reserves.
APA, Harvard, Vancouver, ISO, and other styles
8

Anichina, K. "SYNTHESIS AND ANTINEMATODAL ACTIVITY STUDIES OF SOME FUSED TRIAZINOBENZIMIDAZOLES." In International Trends in Science and Technology. RS Global Sp. z O.O., 2020. http://dx.doi.org/10.31435/rsglobal_conf/30122020/7351.

Full text
Abstract:
4-Aryl-3,4-dihydro[1,3,5]triazino[1,2-a]benzimidazole-2-amines 3a-f were synthesized in the reaction of cyclocondensation between 2-guanidinobenzimidazole and versatilebenzaldehydes. Structures of all prepared compounds were confirmed by IR, 1H NMR spectroscopyand elemental analysis.Antinematodal activity in vitro of the substances was investigated using isolated Trichinella spiralis muscle larvae. The tested triazonobenzimidazoles showed different activity depending on the substituent R in their moleculeas the derivatives substituted with a hydroxyl group demonstrated the best anti-Trichinella spiralis activity in the series.
APA, Harvard, Vancouver, ISO, and other styles
9

Santos, Genivaldo P., Pedro T. Lacava, Susane R. Gomes, and José Atíllio F. F. Rocco. "Kinetics Parameters Evaluation of Paraffin-Based Fuel." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-86275.

Full text
Abstract:
In recent years, Hybrid Propulsion is turning into a significant alternative to Liquid and Solid Propulsion Systems, it presents attractive features and good balance between performance and environmental impact. Thus, paraffin based propellant grains are indicated as a substitute for hydroxyl-terminated polybutadiene (HTPB), the actual solid propellant fuel grain. Despite being a well-known material, scarce data on the relation of activation energy (Ea) and molecular weight (WCxHy) of paraffin is available. In this work, the kinetic parameters (activation energy and pre-exponential factor) of microcrystalline 140/145°F paraffin have been raised through Thermo Gravimetric Analysis in conjunction with the Arrhenius kinetic mechanism, according to ASTM-E1461 and the dependence of molecular weight with melting point from Etessam and Sawyer approach. The 140/145°F paraffin activation energy calculated in this study was compared with different activation energy from alkanes and substances used as fuel in the propulsion systems field. The analysis indicated that the microcrystalline 140/145°F paraffin, manufactured by Petrobras, presents activation energy of 224 KJ.mol−1 and pre-exponential factor of 5.48×1022 min−1. Ignition was achieved with a 50 W pyrotechnic igniter. The firing test with 140/145°F paraffin fuel and gaseous oxygen (GOX) mass flux of 130 Kg.s−1 m−2 at pressure above 0.80 MPa, was easily sustained.
APA, Harvard, Vancouver, ISO, and other styles
10

Vasilyev, A., V. Zakharov, V. Lyashenko, R. Medvedev, O. Chelebyan, and A. Maiorova. "Experience of Low-Emission Combustion of Aviation and Bio Fuels in Individual Flames After Front Mini-Modules of a Combustion Chamber." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-75419.

Full text
Abstract:
In the world economy more and more attention is paid to the environment protection. This has brought a requirement for reduction of harmful substances emission from the gas turbine engine combustors to the foreground scene. Several concepts of low-emission combustion of liquid fuels have been suggested to solve the problem of nitric oxide emission reduction. The authors consider combustion of lean homogenized (quick-mixed) fuel-air mixtures to be the most promising concept for a multi-mode combustion chamber. Based on the accumulated experience, the authors have formed some notion with respect to design peculiarities of low-emission combustors. Based on such general notions, an attempt has been made to create a model combustion chamber for decreasing harmful substances emission. A design for compact mixing modules has been worked out, as well as for a perforated flame tube. 3D computations have been carried out for the flow in the combustor compartment with 3 mini-modules, so to compare design and experimental data. In calculations the air entered the flame tube through a channel with a rectangular cross-section and, further, through swirlers of three burners (60% of air flow). Besides, the air came into the gap between the flame tube and casing through two side channels and, further, it got inside the flame tube through cooling system holes (40% of air flow). In parallel, tests have been carried out in similar combustor compartment, using standard fuels, measuring harmful substances emission at gas temperature (T4) up to 1700 K. Data obtained testifies to essential reduction of nitric oxides in the experimental combustor being considered. Emission index NOx does not exceed value of 1 g/kg f in all the conditions investigated. Fuel efficiency is ≥ 99% for all the measurement regimes, except one, where it is 98%. Additionally, tests have been conducted, using bio fuel obtained from plant raw material. Research results have revealed problems of changeover to such type of fuel mixtures. Comparing test data with 3D simulation results, it can be noted that there, where computed value of the fuel combustion efficiency coincides with the measured one, NOx value also coincides. However, the emission index value is higher there, where the fuel combustion efficiency value obtained in computation is higher, i.e. where there are zones with higher temperature. The experimental results obtained have confirmed possibility of organizing low-emission combustion, as well as possibility of achieving the nitric oxide emission index level equal to 1 g/kg f at the combustor inlet temperature of 682K. It is evident that more detailed design study is required for transfer of the experimental technology to the working compartment of the combustion chamber. The achieved level of harmful substances emission, after improvement and implementation of technology, may allow meeting the strictest ICAO requirements and reducing the airport fees significantly.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'F substance' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography