Results 1 to 10 of about 655,824 (283)

An archaeo-metabolomics approach for identifying cedar tar in archaeological samples: differentiating plant products and production processes [PDF]

Scientific Reports
The human ability to create manufactured substances is not a modern innovation. It began in the Middle Palaeolithic with the production of birch tar through dry distillation, a process of heating bark under low-oxygen conditions.
Barbara Huber, Océane Pollet, Sahar B. Kandil, Dennis Graen, Lou Spanneut, Daniel Giddings Vassão, Lindsay Mas-Normand, Céline Joliot, Elizabeth Roche, Sylvain Burri, Aline Durand, Martine Regert, Ricardo Fernandes, John A. Pickett, Gérald Culioli, Thibaut Devièse   +15 more
doaj   +2 more sources

Production of Pitch from Coal Tar of the Coke Chemical Production “Qarmet” [PDF]

Molecules
Medium-temperature pitch was obtained by vacuum distillation of coal tar from the Qarmet coke chemical production. To determine the composition of the organic constituent of the Qarmet coal tar, the component composition was analyzed via gas–liquid ...
Aigul T. Ordabaeva, Zainulla M. Muldakhmetov, Mazhit G. Meiramov, Sergey V. Kim, Zhenisgul I. Sagintaeva   +4 more
doaj   +2 more sources

Effectiveness of Juniper Essential Oils in Reducing Selected Cigarette Smoke Toxicants, Improving Oxidative Parameters, and Cytotoxicity Against Lung Adenocarcinoma [PDF]

Biochemistry Research International
Tobacco smoke contains toxic chemical substances that mediate the generation of reactive oxygen species and lung cancer. This study investigates the potential of essential oils (EOs) from Juniperus oxycedrus (JOX) and Juniperus phoenicea L.
Haouaouchi Fatma Zohra, Boudiba Sameh, Boudiba Louiza, Baya Berka, Karima Hanini, Gasmi Salim, Soraya Hioun, Alfred Ngenge Tamfu   +7 more
doaj   +2 more sources

Utilization of Organic Solvents for the Recycling of Waste Wooden Railroad Ties [PDF]

Molecules
Wooden waste railroad ties preserved with coal tar creosote oil represent a specific source of polluting substances. The aim of this study was to investigate and compare extraction capacity due to solvent extraction of fifteen frequently used organic ...
Željka M. Nikolić, Miloš S. Tošić, Jelena M. Radivojević, Mihajlo Gigov, Milica P. Marčeta Kaninski, Vladimir M. Nikolić, Dragana Z. Živojinović   +6 more
doaj   +2 more sources

Determination of the adsorbent specific surface area at tar removing from industrial waste water of ammonium sulphate production

Trudy Odesskogo Politehničeskogo Universiteta, 2016
At most coke plants of Ukraine and the world, ammonium sulphate (NH4)2SO4, which is an ammonium fertilizer, get in the department of trapping chemical products of coking.
Анна Володимирівна Іванченко, Дмитро Олександрович Єлатонцев   +1 more
doaj   +7 more sources

Catalytic properties of some mineral salts in relation to the process of decomposition of pyrolysis tar

Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2023
The paper discusses the results of an experimental study of the thermal decomposition of pyrolytic wood tar in a homogeneous process, as well as in the presence of a number of mineral substances: potassium sulfate, magnesium sulfate, monopotassium ...
M. V. Malko, K. V. Dobrego, S. V. Vasilevich, D. V. Degterov   +3 more
doaj   +1 more source

Improvement of the thermal properties of pitch by waste plastic (polyvinyl chloride) addition

Journal of Materials Research and Technology, 2021
To modify the thermal properties of pitch by adding polyvinyl chloride (PVC), co-pyrolysis of PVC and coal tar pitch was performed. PVC decomposes into HCl and de-HCl PVC (polyene) above 200 °C, and these substances affect the synthesis behavior of coal ...
Yun Jeong Choi, Ji Hong Kim, Ji Sun Im
doaj   +1 more source

Evaluation of demulsifiers efficiency for coal tar dehydration according to the value of its viscosity reduction

Хімія, фізика та технологія поверхні, 2023
For the first time, the relationship between the efficiency of dehydration and the value of reducing the viscosity of the coal tar by adding demulsifier has been studied for “water in tar” emulsions. The dewatering of coal tar emulsions was investigated
L. P. Bannikov, D. V. Miroshnichenko, O. L. Borisenko, A. L. Bannikov   +3 more
doaj   +1 more source

Dynamic changes in optical and chemical properties of tar ball aerosols by atmospheric photochemical aging [PDF]

Atmospheric Chemistry and Physics, 2019
Following wood pyrolysis, tar ball aerosols were laboratory generated from wood tar separated into polar and nonpolar phases. Chemical information of fresh tar balls was obtained from a high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS)
C. Li, Q. He, J. Schade, J. Passig, J. Passig, R. Zimmermann, R. Zimmermann, D. Meidan, A. Laskin, Y. Rudich   +9 more
doaj   +1 more source

FTIR Analysis of the Functional Group Composition of Coal Tar Residue Extracts and Extractive Residues

Applied Sciences, 2023
The extracts and extractive residues were obtained by single-stage extraction with acetone, CS2 and acetone/carbon disulphide solvent (IACDSM) under mild conditions, and they were then characterised by infrared and segmented peak fitting analysis.
Xiaolong Wang, Xin He, Xiaohua Wang
doaj   +1 more source