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Showing 1 to 12 of 143 entries
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Awareness of occupational hazards and associated factors among welders in Lideta Sub-City, Addis Ababa, Ethiopia.

Journal of occupational medicine and toxicology (London, England)

Tadesse S, Bezabih K, Destaw B, Assefa Y.
PMID: 27051458
J Occup Med Toxicol. 2016 Apr 05;11:15. doi: 10.1186/s12995-016-0105-x. eCollection 2016.

BACKGROUND: Welding is a manufacturing industry where workers could be exposed to several hazards. However, there is a dearth of studies clarifying the situation in Ethiopia. The present study determined the level of awareness of occupational hazards and associated...

Phosphatation of zeolite H-ZSM-5: a combined microscopy and spectroscopy study.

Chemphyschem : a European journal of chemical physics and physical chemistry

van der Bij HE, Aramburo LR, Arstad B, Dynes JJ, Wang J, Weckhuysen BM.
PMID: 24402742
Chemphyschem. 2014 Feb 03;15(2):283-92. doi: 10.1002/cphc.201300910. Epub 2014 Jan 08.

A variety of phosphated zeolite H-ZSM-5 samples are investigated by using a combination of Fourier transfer infrared (FTIR) spectroscopy, single pulse (27)Al, (29)Si, (31)P, (1)H-(31)P cross polarization (CP), (27)Al-(31)P CP, and (27)Al 3Q magic angle spinning nuclear magnetic resonance...

The stability of amino-functionalized polyhedral oligomeric silsesquioxanes in water.

The journal of physical chemistry. B

Neyertz S, Brown D, Pilz M, Rival N, Arstad B, Männle F, Simon C.
PMID: 25942518
J Phys Chem B. 2015 May 28;119(21):6433-47. doi: 10.1021/acs.jpcb.5b01955. Epub 2015 May 15.

Octa(aminopropylsilsesquioxane) Si8O12[(CH2)3NH2]8 is a very important precursor for many other hybrid organic/inorganic polyhedral oligomeric silsesquioxanes (POSS) because of the reactivity of its primary amine groups. Unfortunately, it is unstable in water, which can lead to the cleavage of its...

Housekeeping: as a fiscal service.

Hospital progress

VESTAL A.
PMID: 13664260
Hosp Prog. 1959 Jun;40(6):112 passim.

No abstract available.

The housekeeper's responsibility in the battle against infections.

Hospital progress

VESTAL A.
PMID: 13548957
Hosp Prog. 1958 Jun;39(6):126 passim.

No abstract available.

Estimation of X-ray beam quality by electron paramagnetic resonance (EPR) spectroscopy.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

Malinen E, Vestad TA, Hult EA, Hole EO, Sagstuen E.
PMID: 15110359
Appl Radiat Isot. 2004 Jun;60(6):929-37. doi: 10.1016/j.apradiso.2004.02.005.

A novel dosimetry-based technique using EPR spectroscopy to determine X-ray beam quality is proposed. The radiation-sensitive material is made of a mixture of two polycrystalline substances with different X-ray absorption properties. The composite samples, consisting of polycrystalline lithium formate...

Theoretical study of the methylbenzene side-chain hydrocarbon pool mechanism in methanol to olefin catalysis.

Journal of the American Chemical Society

Arstad B, Nicholas JB, Haw JF.
PMID: 14995217
J Am Chem Soc. 2004 Mar 10;126(9):2991-3001. doi: 10.1021/ja035923j.

Recent experimental work has shown that methanol to olefin (MTO) catalysis on microporous solid acids proceeds through a hydrocarbon pool mechanism with methylbenzenes frequently acting as the most important reaction centers. Other recent experimental evidence suggests that side-chain methylation...

Theoretical study of ethylbenzenium ions: the mechanism for splitting off ethene, and the formation of a pi complex of ethene and the benzenium ion.

The journal of physical chemistry. A

Kolboe S, Svelle S, Arstad B.
PMID: 19099448
J Phys Chem A. 2009 Feb 05;113(5):917-23. doi: 10.1021/jp8070234.

Structures and energies of protonated ethylbenzene and 2,6-dimethylethylbenzene have been studied by quantum chemical calculations. The main goal is to study the mechanism for splitting off ethene from protonated ethylbenzene. Data are reported for the four ethylbenzenium isomers arising...

Theoretical study of the heptamethylbenzenium ion. Intramolecular isomerizations and C2, C3, C4 alkene elimination.

The journal of physical chemistry. A

Arstad B, Kolboe S, Swang O.
PMID: 16834295
J Phys Chem A. 2005 Oct 06;109(39):8914-22. doi: 10.1021/jp058166f.

Recent experimental work on the methanol-to-hydrocarbons (MTH) reaction in zeolite H-Beta suggests that the heptamethylbenzenium (heptaMB+) cation is an important intermediate. We have carried out quantum chemical calculations to investigate intramolecular isomerization reactions and eliminations of small alkenes such...

Hospital uniforms.

Hospital progress

VESTAL A.
PMID: 13630514
Hosp Prog. 1959 Feb;40(2):100 passim.

No abstract available.

The Nuclearity of the Active Site for Methane to Methanol Conversion in Cu-Mordenite: A Quantitative Assessment.

Journal of the American Chemical Society

Pappas DK, Martini A, Dyballa M, Kvande K, Teketel S, Lomachenko KA, Baran R, Glatzel P, Arstad B, Berlier G, Lamberti C, Bordiga S, Olsbye U, Svelle S, Beato P, Borfecchia E.
PMID: 30346154
J Am Chem Soc. 2018 Nov 14;140(45):15270-15278. doi: 10.1021/jacs.8b08071. Epub 2018 Nov 02.

The direct conversion of methane to methanol (MTM) is a reaction that has the potential to disrupt a great part of the synthesis gas-derived chemical industry. However, despite many decades of research, active enough catalysts and suitable processes for...

Cotton dust exposure and self-reported respiratory symptoms among textile factory workers in Northwest Ethiopia: a comparative cross-sectional study.

Journal of occupational medicine and toxicology (London, England)

Daba Wami S, Chercos DH, Dessie A, Gizaw Z, Getachew A, Hambisa T, Guadu T, Getachew D, Destaw B.
PMID: 29636789
J Occup Med Toxicol. 2018 Apr 03;13:13. doi: 10.1186/s12995-018-0194-9. eCollection 2018.

BACKGROUND: Cotton dust induced respiratory disorders are dramatically increased over the globe, especially the problem is serious in developing countries. Respiratory symptoms, such as cough, phlegm, wheezing, shortness of breath, chest tightness, chronic bronchitis, and byssinosis are common among...

Showing 1 to 12 of 143 entries