scholarly journals Analysis of Ambiguous Information about Chemical Compounds in Online Databases

2017 ◽  
Vol 13 (10) ◽  
Author(s):  
Martin Rusek ◽  
Antonín Jančařík
Keyword(s):  
Chemical Compounds ◽  
Ambiguous Information ◽  
Online Databases

Cytochemical analysis of mast cell granules after poly-dl-lysine action

1978 ◽  
Vol 36 (2) ◽  
pp. 278-279
Author(s):  
R. Courtoy ◽  
L.J. Simar ◽  
J. Christophe
Keyword(s):  
Mast Cell ◽  
Mast Cells ◽  
Chemical Compounds ◽  
Cellular Membrane ◽  
Thin Sections ◽  
Organic Bases ◽  
Ferric Thiocyanate ◽  
Cytochemical Analysis ◽  
Mast Cell Granule ◽  
Amine Liberation

Several chemical compounds induce amine liberation from mast cells but do not necessarily provoque the granule expulsion. For example, poly-dl-lysine induces modifications of the cellular membrane permeability which promotes ion exchange at the level of mast cell granules. Few of them are expulsed but the majority remains in the cytoplasm and appears less dense to the electrons. A cytochemical analysis has been performed to determine the composition of these granules after the polylysine action.We have previously reported that it was possible to demonstrate polyanions on epon thin sections using a cetylpyridinium ferric thiocyanate method. Organic bases are selectively stained with cobalt thiocyanate and the sulfhydryle groups are characterized with a silver methenamine reaction. These techniques permit to reveal the mast cell granule constituents, i.e. heparin, biogenic amines and basic proteins.

Growth of near noble metal Pd and Pt thin film silicides morphology and structure

1984 ◽  
Vol 42 ◽  
pp. 498-499
Author(s):  
E. I. Alessandrini ◽  
M. O. Aboelfotoh
Keyword(s):  
Noble Metals ◽  
Annealing Temperature ◽  
Chemical Compounds ◽  
Barrier Properties ◽  
Solid State Reactions ◽  
Transmission Electron ◽  
Stable Chemical ◽  
Metal Thickness ◽  
Amorphous Si ◽  
Si Films

Considerable interest has been generated in solid state reactions between thin films of near noble metals and silicon. These metals deposited on Si form numerous stable chemical compounds at low temperatures and have found applications as Schottky barrier contacts to silicon in VLSI devices. Since the very first phase that nucleates in contact with Si determines the barrier properties, the purpose of our study was to investigate the silicide formation of the near noble metals, Pd and Pt, at very thin thickness of the metal films on amorphous silicon.Films of Pd and Pt in the thickness range of 0.5nm to 20nm were made by room temperature evaporation on 40nm thick amorphous Si films, which were first deposited on 30nm thick amorphous Si3N4 membranes in a window configuration. The deposition rate was 0.1 to 0.5nm/sec and the pressure during deposition was 3 x 10 -7 Torr. The samples were annealed at temperatures in the range from 200° to 650°C in a furnace with helium purified by hot (950°C) Ti particles. Transmission electron microscopy and diffraction techniques were used to evaluate changes in structure and morphology of the phases formed as a function of metal thickness and annealing temperature.

A Systematic Review of User Expectations and Outcomes of Crisis Support Services

Crisis ◽  
2020 ◽  
pp. 1-9
Author(s):  
Kelly Mazzer ◽  
Megan O'Riordan ◽  
Alan Woodward ◽  
Debra Rickwood
Keyword(s):  
Systematic Review ◽  
Support Services ◽  
Text Message ◽  
Positive Outcomes ◽  
Online Chat ◽  
Online Databases ◽  
Personal Crisis ◽  
Crisis Support ◽  
User Expectations ◽  
Behavioural Sciences

Abstract. Background: Crisis support services play an important role in providing free, immediate access to support people in the community experiencing a personal crisis. Recently, services have expanded from telephone to digital modalities including online chat and text message services. This raises the question of what outcomes are being achieved for increasingly diverse service users across different modalities. Aims: This systematic review aimed to determine the expectations and outcomes of users of crisis support services across three modalities (telephone, online chat, and text message/SMS). Method: Online databases (CINAHL, MEDLINE, PsycARTICLES, PsycINFO, Psychological and Behavioural Sciences Collection) and gray literature were searched for studies measuring expectations and outcomes of crisis support services. Results: A total of 31 studies were included in the review, the majority of which were telephone-based. Similar expectations were found for telephone and online chat modalities, as well as consistently positive outcomes, measured by changes in emotional state, satisfaction, and referral plans. Limitations/Conclusion: There is a paucity of consistent outcome measures across and within modalities and limited research about users of text message/SMS services.

Vulnerability of medical students and professionals to extreme work stress: A select review of the literature

2018 ◽  
Vol 14 (2) ◽  
pp. 181-187
Author(s):  
Maciej Walkiewicz ◽  
Małgorzata Tartas
Keyword(s):  
Medical Students ◽  
Work Stress ◽  
English Language ◽  
Psychological Intervention ◽  
Medical Professionals ◽  
Extreme Stress ◽  
Online Databases ◽  
Medical Career ◽  
Medical University ◽  
The Impact

The goal of the paper is to describe the extent to which medical students and professionals are vulnerable to extreme stress. A select review of existing literature on this area has been undertaken, using the English-language online databases EBSCO, Medline and PubMed. The search has identified 36 citations relating to 6324 medical students and 28,285 medical staff (physicians, residents, nurses). The review indicates that merely beginning medical studies is a risk factor for stress, and that medical professionals, who are vulnerable to extreme work stress, say that they do not receive enough support from their co-workers. They are also often notably impulsive, introverted, neurotic and perfectionist, with low emotional intelligence and agreeableness, as well as low and external locus of control. Additionally, from longitudinal studies we have been able to identify psychological factors underpinning admission to a medical university that may be useful for predicting future stress in medical career. The results of this study may be taken into account when organizing psychological intervention programs targeted at educating future medical professionals. It seems that early identification of people at risk could reduce the impact of stress related to medical career and enhance the somatic and mental health of medical professionals.

Analysis of Bioactive Chemical Compounds of Trogoderma granarium (Insecta: Coleoptera: Dermestidae) Using Gas Chromatography – Mass Spectrometry

2017 ◽  
Vol 9 (03) ◽  
Author(s):  
Jenan Mohammed Ubaid ◽  
Abeer Fauzi Al-Rubaye ◽  
Imad Hadi Hameed
Keyword(s):  
Acetic Acid ◽  
Benzoyl Chloride ◽  
Methanolic Extract ◽  
Biological Activities ◽  
Chemical Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Pentanoic Acid ◽  
Trogoderma Granarium ◽  
Trans Methyl ◽  
Phenacyl Thiocyanate

Methanolic extract of bioactive compounds of Trogoderma granarium was assayed. GC-MS analysis of Trogoderma granarium revealed the existence of the Pentanoic acid , 1,1-dimethylpropyl ester , (1H)-Pyrimidinone , 5-chloro-4,6- diphenyl, Cyclobutanemethanol , α-methyl- , Nitro-2-methyl-1,3-propanediol , Hydroxylamine ,O-(2-methylpropyl)- , Uridine , 2',3'-O-(phenylmethylene)- ,Acetic acid ,2-benzoylthio-,2-oxo-2-phenylethyl ester , methylpropyl)- , Uridine , 2',3'-O-(phenylmethylene)- , 5'-(4-methylbenzenesulfo , Indolinol , 1-benzoyl-, Benzeneethanol , β-methyl-,(s)- , Acetic acid ,2-benzoylthio-,2-oxo-2-phenylethyl ester , Phenacyl thiocyanate , Deoxy-L-ribose-2,5-dibenzoate , Methenamine , Alanine , N-methyl-n-propargyloxycarbonyl-, decyl ester , Benzoyl chloride , Thiophene-2-ol , benzoate , Ethanone , -(5- nitrotetrazol-2-yl)-1-phenyl- , 2,5-Dimethylhexane-2,5-dihydroperoxide , Benzamide , N-(3-benzylthio-1,2,4-thiadiazol- 5-yl)- , Methyl p-(2-phenyl-1-benzimidazolyl)benzoate , Methyl-2-phenoxyethylamine , Pentaborane(11) , cis-Methoxy- 5-trans-methyl-1R-cyclohexanol , Nitro-1-phenyl-3-(tetrahydropyran-2-yloxy)propan-1-one , cis-Methoxy-5-transmethyl-1R-cyclohexanol. Trogoderma granarium produce many important secondary metabolites with high biological activities.

Study effect of crude extracts of Hibiscus sabdarifa L. on some Enterobacteriaceae

2018 ◽  
Vol 9 (SPL1) ◽  
Author(s):  
Sabreen A Kamal ◽  
Ishraq A Salih ◽  
Hawraa Jawad Kadhim ◽  
Zainab A Tolaifeh
Keyword(s):  
Escherichia Coli ◽  
Ethyl Acetate ◽  
Bacterial Growth ◽  
Chemical Compounds ◽  
Inhibition Zone ◽  
Crude Extracts ◽  
And Control

Red rose or roselle (beauty rose ) is natively known as red tea belong to Malvaceae, it is flowers use traditionally for antihypertensive hepato protective, anticancer,antidiabetic,antibacterial, cytotoxicity and antidiarreal, By preparing red tea from it's flower. In this study, we extract chemical compounds by using two solvent which are Ethanol, Ethyl acetate. so we can extract Anthocyanin which is responsible for red colour of flower with many chemical compounds. then study the effect of these extracts on 5 genera from Enterobacteriacaea which can cause diarrheae (Shigella, Salmonella, Escherichia coli, Proteus and Klebsiella ) by preparing 3 concentrations for each solvent (250, 500, 750 ) mg/ml, and control then compare with two antibiotic (Azereonam 30 mg/ml and Bacitracin 10 mg/ml ) these extracts revealed obvious inhibition zone in bacterial growth.

DMSP – Database for Modeling Signaling Pathways

2008 ◽  
Vol 47 (02) ◽  
pp. 104-148
Author(s):  
M. Breit ◽  
B. Pfeifer ◽  
C. Baumgartner ◽  
R. Modre-Osprian ◽  
B. Tilg ◽  
...  
Keyword(s):  
Knowledge Base ◽  
Signaling Pathways ◽  
Protein Interaction ◽  
Initial Step ◽  
Point Of View ◽  
Biological Knowledge ◽  
Literature Study ◽  
Online Databases ◽  
Qualitative Level ◽  
Pathway Models

Summary Objectives: Presently, the protein interaction information concerning different signaling pathways is available in a qualitative manner in different online protein interaction databases. The challenge here is to derive a quantitative way of modeling signaling pathways from qualitative way of modeling signaling pathways from a qualitative level. To address this issue we developed a database that includes mathematical modeling knowledge and biological knowledge about different signaling pathways. Methods: The database is part of an integrative environment that includes environments for pathway design, visualization, simulation and a knowledge base that combines biological and modeling information concerning pathways. The system is designed as a client-server architecture. It contains a pathway designing environment and a simulation environment as upper layers with a relational knowledge base as the underlying layer. Results: DMSP – Database for Modeling Signaling Pathways incorporates biological datasets from online databases like BIND, DIP, PIP, and SPiD. The modeling knowledge that has been incorporated is based on a literature study. Pathway models can be designed, visualized and simulated based on the knowledge stored in the DMSP. The user can download the whole dataset and build pathway models using the knowledge stored in our database. As an example, the TNF? pathway model was implemented and tested using this approach. Conclusion: DMSP is an initial step towards the aim of combining modeling and biological knowledge concerning signaling pathways. It helps in understanding pathways in a qualitative manner from a qualitative level. Simulation results enable the interpretation of a biological system from a quantitative and systemtheoretic point of view.

Sign in / Sign up

Export Citation Format

Share Document