Evaluation of new biodegradable fluid on the basis  of accelerated durability test, FTIR and ICP spectroscopy

The paper deals with the properties of newly developed synthetic biodegradable fluid in terms of its operational and physico-chemical properties. The evaluated fluid is a new biodegradable fluid MOL Farm UTTO Synt, which belongs to the group of universal gear-hydraulic fluids. At the beginning, the fluid was subjected to accelerated durability test under laboratory conditions, with monitoring its impact on technical conditions of the used hydraulic pump UD 25. After that, the FTIR spectroscopy analysis was performed, with monitoring thermal oxidation, oxidation by acid products, water content and additives depletion. Depletion of additives was also monitored by the ICP spectroscopy. Based on these results, it can be stated that the newly developed fluid has good operational and physico-chemical properties after the durability test and is suitable for further testing under operational conditions without a risk of damaging agricultural machines.

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Production, Characterization, and Evaluation of Pellets from Rice Harvest Residues

Energies ◽

10.3390/en13020479 ◽

2020 ◽

Vol 13 (2) ◽

pp. 479 ◽

Cited By ~ 3

Author(s):

Cristina Moliner ◽

Alberto Lagazzo ◽

Barbara Bosio ◽

Rodolfo Botter ◽

Elisabetta Arato

Keyword(s):

Moisture Content ◽

Rice Straw ◽

Rice Husk ◽

Mechanical Performance ◽

Chemical Properties ◽

Quality Standards ◽

Operational Conditions ◽

Diametral Compression ◽

Physical Chemical ◽

Physico Chemical

Pellets from residues from rice harvest (i.e., straw and husk) were produced and their main properties were evaluated. Firstly, rice straw pellets were produced at lab scale at varying operational conditions (i.e., load compression and wt % of feeding moisture content) to evaluate their suitability for palletization. Successively, rice straw and husk pellets were commercially produced. All the samples were characterized in terms of their main physical, chemical, and physico-chemical properties. In addition, axial/diametral compression and durability tests were performed to assess their mechanical performance. All the analyzed properties were compared with the established quality standards for non-woody pellets. In general, rice straw pellets presented suitable properties for their use as pelletized fuels. Rice husk pellets fell out of the standards in recommended size or durability and thus preliminary treatments might be required prior their use as fuels.

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Construction proposal of hydraulic equipment designed to test hydraulic components and energy carriers

MATEC Web of Conferences ◽

10.1051/matecconf/201930201020 ◽

2019 ◽

Vol 302 ◽

pp. 01020

Author(s):

Jozef Nosian ◽

Marietta Markiewicz ◽

Romana Janoušková ◽

Patrícia Feriancová

Keyword(s):

Hydraulic Systems ◽

Hydraulic Pump ◽

Laboratory Equipment ◽

Energy Carriers ◽

Hydraulic Equipment ◽

Hydraulic Fluids ◽

Measurement And Testing ◽

Test Individual ◽

Over Time ◽

Agricultural Machines

The aim of the present article is the construction of a device for measuring and testing hydrostatic converters and subsequent verification measurement of the proposed device. This device will allow the measurement and testing of hydraulic pumps under laboratory conditions. In our case, we will test the hydraulic pump UD–25R, which is used in hydraulic drives of agricultural machines. Last but not least, the device described in the article can be used to test individual energy carriers used in hydraulic systems. The described device can simulate conditions that occur in operation. Using verification measurements we have proved that the designed laboratory equipment is suitable for testing hydraulic components and also allows monitoring and testing of the properties of individual hydraulic fluids. The measurement will result in a change in flow rate over time.

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Fluorescence and Physico-Chemical Properties of Hydrogenated Detonation Nanodiamonds

C – Journal of Carbon Research ◽

10.3390/c6010007 ◽

2020 ◽

Vol 6 (1) ◽

pp. 7 ◽

Cited By ~ 2

Author(s):

Giannis Thalassinos ◽

Alastair Stacey ◽

Nikolai Dontschuk ◽

Billy J. Murdoch ◽

Edwin Mayes ◽

...

Keyword(s):

Chemical Properties ◽

Detonation Nanodiamonds ◽

Fluorescence Properties ◽

Spectroscopy Analysis ◽

Time Resolved ◽

Colloidal Properties ◽

Physico Chemical ◽

First Time ◽

Electron Energy Loss ◽

Surface Chemistries

Hydrogenated detonation nanodiamonds are of great interest for emerging applications in areas from biology and medicine to lubrication. Here, we compare the two main hydrogenation techniques—annealing in hydrogen and plasma-assisted hydrogenation—for the creation of detonation nanodiamonds with a hydrogen terminated surface from the same starting material. Synchrotron-based soft X-ray spectroscopy, infrared absorption spectroscopy, and electron energy loss spectroscopy were employed to quantify diamond and non-diamond carbon contents and determine the surface chemistries of all samples. Dynamic light scattering was used to study the particles’ colloidal properties in water. For the first time, steady-state and time-resolved fluorescence spectroscopy analysis at temperatures from room temperature down to 10 K was performed to investigate the particles’ fluorescence properties. Our results show that both hydrogenation techniques produce hydrogenated detonation nanodiamonds with overall similar physico-chemical and fluorescence properties.

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Micro/Nano Indentation and Micro-FTIR Spectroscopy Study of Weathering of Coated Engineering Thermoplastics

MRS Proceedings ◽

10.1557/proc-875-o2.2 ◽

2005 ◽

Vol 875 ◽

Author(s):

Samik Gupta ◽

Jan Lohmeijer ◽

Savio Sebastian ◽

Nisha Preschilla ◽

Amit Biswas

Keyword(s):

Ftir Spectroscopy ◽

Performance Prediction ◽

Mechanical Performance ◽

Coating Layer ◽

Chemical Properties ◽

Depth Sensing ◽

Nano Indentation ◽

Physico Chemical ◽

Spectroscopy Studies ◽

Micro Indentation

AbstractA novel combination of depth-sensing nano-indentation, micro-indentation and micro-FTIR techniques is employed towards understanding the durability of coating layers used on engineering thermoplastics upon exposure to harsh weathering environments. This combination of techniques enables study of changes in surface-to-bulk properties in the clearcoat-substrate system upon weathering; typically observed as a degradation starting from the surface and then proceeding inwards to the bulk of the material. Nano-indentation measurements carried out to understand the mechanical properties of the coating layer provide insights into the changes in hardness and modulus upon prolonged weathering exposure. Depth-sensing micro-indentation and micro-FTIR spectroscopy studies performed to evaluate mechanical performance and chemical changes, respectively, explain the influence of the substrate on the coating layer, especially at the interface upon weathering. This unique combination of depth-sensing indentation and micro-FTIR spectroscopy has led to an understanding of the properties of the coating layer and the substrate individually as well as an integral system as a function of weathering exposure time. Finally, the physico-chemical properties of the coating and substrate are linked to performance prediction, enabling optimization of coating-substrate combinations.

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Physico-chemical properties investigation of softwood surface after treatment with organic anhydride

Open Chemistry ◽

10.2478/s11532-013-0337-x ◽

2013 ◽

Vol 11 (12) ◽

pp. 2098-2106 ◽

Cited By ~ 7

Author(s):

Ruxanda Bodîrlău ◽

Carmen-Alice Teacă ◽

Dan Roşu ◽

Liliana Roşu ◽

Cristian-Dragoş Varganici ◽

...

Keyword(s):

Chemical Treatment ◽

Photoelectron Spectroscopy ◽

Succinic Anhydride ◽

Chemical Properties ◽

Weight Percent Gain ◽

Weight Percent ◽

Spectroscopy Analysis ◽

X Ray ◽

Physico Chemical ◽

Thermal Stability Of

AbstractWood originating from a softwood species was subjected to chemical treatment by reaction with succinic anhydride in N, N-dimethylformamide at different concentration values. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analysis were used to study changes that occurred on a softwood surface. The extent of chemical treatment on softwood was evaluated by determining the weight percent gain values. Thermal properties of modified softwood and the water absorption were also evaluated. The chemical treatment with succinic anhydride influenced the thermal stability of the softwood samples with increasing anhydride concentration levels.

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Decoration of specific sites on freeze-fractured membranes

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100081565 ◽

1978 ◽

Vol 36 (2) ◽

pp. 140-141

Author(s):

H. Gross ◽

H. Moor

Keyword(s):

Pure Water ◽

Freeze Fracture ◽

Chemical Properties ◽

Surface Forces ◽

Sulfate Pentahydrate ◽

Copper Sulfate Pentahydrate ◽

Physico Chemical ◽

Water Of Hydration ◽

Small Container ◽

Binding Forces

Fracturing under ultrahigh vacuum (UHV, p ≤ 10-9 Torr) produces membrane fracture faces devoid of contamination. Such clean surfaces are a prerequisite foe studies of interactions between condensing molecules is possible and surface forces are unequally distributed, the condensate will accumulate at places with high binding forces; crystallites will arise which may be useful a probes for surface sites with specific physico-chemical properties. Specific “decoration” with crystallites can be achieved nby exposing membrane fracture faces to water vopour. A device was developed which enables the production of pure water vapour and the controlled variation of its partial pressure in an UHV freeze-fracture apparatus (Fig.1a). Under vaccum (≤ 10-3 Torr), small container filled with copper-sulfate-pentahydrate is heated with a heating coil, with the temperature controlled by means of a thermocouple. The water of hydration thereby released enters a storage vessel.

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PHYSICO CHEMICAL PROPERTIES OF NICKEL OXIDE AT HIGH TEMPERATURE

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1976798 ◽

1976 ◽

Vol 37 (C7) ◽

pp. C7-438-C7-442 ◽

Cited By ~ 2

Author(s):

R. FARHI ◽

G. PETOT-ERVAS

Keyword(s):

High Temperature ◽

Nickel Oxide ◽

Chemical Properties ◽

Physico Chemical

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Physico-Chemical Properties of Recombinant Desulphatohirudin

Thrombosis and Haemostasis ◽

10.1055/s-0038-1645073 ◽

1990 ◽

Vol 63 (03) ◽

pp. 499-504 ◽

Cited By ~ 4

Author(s):

A Electricwala ◽

L Irons ◽

R Wait ◽

R J G Carr ◽

R J Ling ◽

...

Keyword(s):

Molecular Weight ◽

Gel Filtration ◽

Chemical Properties ◽

Alpha Helix ◽

Apparent Molecular Weight ◽

Correlation Spectroscopy ◽

Nmr Studies ◽

Recombinant Hirudin ◽

Physico Chemical ◽

Recombinant Molecule

SummaryPhysico-chemical properties of recombinant desulphatohirudin expressed in yeast (CIBA GEIGY code No. CGP 39393) were reinvestigated. As previously reported for natural hirudin, the recombinant molecule exhibited abnormal behaviour by gel filtration with an apparent molecular weight greater than that based on the primary structure. However, molecular weight estimation by SDS gel electrophoresis, FAB-mass spectrometry and Photon Correlation Spectroscopy were in agreement with the theoretical molecular weight, with little suggestion of dimer or aggregate formation. Circular dichroism studies of the recombinant molecule show similar spectra at different pH values but are markedly different from that reported by Konno et al. (13) for a natural hirudin-variant. Our CD studies indicate the presence of about 60% beta sheet and the absence of alpha helix in the secondary structure of recombinant hirudin, in agreement with the conformation determined by NMR studies (17)

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