scholarly journals Corrigendum QUALITATIVE ANALYSIS OF GLASS FIBRE FILTER AND RESPIRABLE FOAM USING X-RAY FLUORESCENCE

2017 ◽  
pp. 099
Author(s):  
Nenad Živković
Keyword(s):  
Qualitative Analysis ◽  
Environmental Protection ◽  
Glass Fibre ◽  
Science And Technology ◽  
State University ◽  
X Ray ◽  
Ondo State

CorrigendumThompson Faraday Ediagbonya1, S.A. Uzoekwe2, H. Ayedun1QUALITATIVE ANALYSIS OF GLASS FIBRE FILTER AND RESPIRABLE FOAM USING X-RAY FLUORESCENCE 1Chemical Sciences, Ondo State University of Science and Technology, Okitipupa, Nigeria2Chemical Sciences Department, Federal University Utuoke, Bayelsa, Nigeria  FACTA UNIVERSITATIS, Series Working and Living Environmental Protection Vol. 13, No 3, 2016, pp. 215 -223, DOI: 10.22190/FUWLEP1603215E The Editor-in-Chief has been informed that in the article ‘Qualitative Analysis of Glass Fibre Filter and Respirable Foam Using X-Ray Fluorescence’, FACTA UNIVERSITATIS, Series Working and Living Environmental Protection Vol. 13, No 3, 2016, pp. 215-223, DOI: 10.22190/FUWLEP1603215E, co-author’s names - S.A. Uzoekwe, H. Ayedun - have been omitted. After further discussion with the corresponding author, the Editor-in-Chief has decided to publish a corrigendum for this article. Link to the corrected article - DOI: 10.22190/FUWLEP1603215E

A Qualitative Analysis on Environmental Protection and Its Feasibility with Special Reference to a Selected Locality

2019 ◽  
Vol 118 (10) ◽  
pp. 60-66
Author(s):  
A. Govindarajan ◽  
N. Kumar
Keyword(s):  
Qualitative Analysis ◽  
Special Reference ◽  
Environmental Protection ◽  
The People ◽  
Good Environment

It is our prime importance to protect our environment in which we live. Our ancestors left with good environment and now pollution comes in with air, water, noise, soil and so on. The paper suggests a possible way to protect our society especially for the people of Chennai from air, water and radiation by protecting the environment. If same is followed in other cities it can save many, it is only a small means of a bigger initiative of saving our people.

scholarly journals Characterization of Chromium Compensated GaAs Sensors with the Charge-Integrating JUNGFRAU Readout Chip by Means of a Highly Collimated Pencil Beam

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1550
Author(s):  
Dominic Greiffenberg ◽  
Marie Andrä ◽  
Rebecca Barten ◽  
Anna Bergamaschi ◽  
Martin Brückner ◽  
...  
Keyword(s):  
Low Noise ◽  
State University ◽  
Noise Performance ◽  
X Ray ◽  
A Value ◽  
Resolution Capability ◽  
Sensor Properties ◽  
Pixel Pitch ◽  
Lower Noise

Chromium compensated GaAs or GaAs:Cr sensors provided by the Tomsk State University (Russia) were characterized using the low noise, charge integrating readout chip JUNGFRAU with a pixel pitch of 75 × 75 µm2 regarding its application as an X-ray detector at synchrotrons sources or FELs. Sensor properties such as dark current, resistivity, noise performance, spectral resolution capability and charge transport properties were measured and compared with results from a previous batch of GaAs:Cr sensors which were produced from wafers obtained from a different supplier. The properties of the sample from the later batch of sensors from 2017 show a resistivity of 1.69 × 109 Ω/cm, which is 47% higher compared to the previous batch from 2016. Moreover, its noise performance is 14% lower with a value of (101.65 ± 0.04) e− ENC and the resolution of a monochromatic 60 keV photo peak is significantly improved by 38% to a FWHM of 4.3%. Likely, this is due to improvements in charge collection, lower noise, and more homogeneous effective pixel size. In a previous work, a hole lifetime of 1.4 ns for GaAs:Cr sensors was determined for the sensors of the 2016 sensor batch, explaining the so-called “crater effect” which describes the occurrence of negative signals in the pixels around a pixel with a photon hit due to the missing hole contribution to the overall signal causing an incomplete signal induction. In this publication, the “crater effect” is further elaborated by measuring GaAs:Cr sensors using the sensors from 2017. The hole lifetime of these sensors was 2.5 ns. A focused photon beam was used to illuminate well defined positions along the pixels in order to corroborate the findings from the previous work and to further characterize the consequences of the “crater effect” on the detector operation.

scholarly journals SOLUTION OF THE FUNDAMENTAL TASKS OF DEEP PROCESSING OF PLANT WASTE IN THE RESHETNEV SI-BERIAN STATE UNIVERSITY OF SCIENCE AND TECHNOLOGY

2020 ◽  
pp. 303-308
Author(s):  
Edkham Shukriyevich Akbulatov ◽  
Aleksey Viktorovich Lyubyashkin ◽  
Tat'yana Vasil'yevna Ryazanova ◽  
Yuriy Davydovich Alashkevich ◽  
Elena Vladimirovna Isaeva ◽  
...  
Keyword(s):  
Raw Materials ◽  
Science And Technology ◽  
Scientific Activity ◽  
Chemical Technology ◽  
State University ◽  
Highly Qualified ◽  
Plant Materials ◽  
Plant Raw Materials ◽  
Introductory Article ◽  
Business Structures

A special issue of the journal "Chemistry of Plant Raw Materials" published on the 65th anniversary of the department "Chemical Technology of Wood and Biotechnology", the 90th anniversary of the Siberian State Technological University and the 60th anniversary of the Siberian State Aerospace University. The combination of the two largest and socio-economically significant universities ensured the creation in 2016 of the Reshetnev Siberian State University of science and technology. This is the first supporting university in Eastern Siberia, providing training for highly qualified specialists in more than 100 programs for the forestry, woodworking and chemical industries, aviation and space industry, mechanical engineering, scientific and financial organizations, international and Russian business structures, and the media. The introductory article presents a brief historical excursion, the main directions and prospects of scientific activity of the department “Chemical technology of wood and biotechnology”. They are related to solving the problem of deep complex processing of plant materials with the involvement of modern biological and chemical technologies.

scholarly journals Assessing the Heamatology of Uda Rams Fed Graded Levels of Processed Cassava (Manihot esculentus L.) Peels

2021 ◽  
pp. 30-37
Author(s):  
M. M. Mika’ilu ◽  
A. A. Kwaido ◽  
S. A. Maigandi ◽  
I. M. Ribah ◽  
K. M. Aljameel ◽  
...  
Keyword(s):  
Factorial Design ◽  
Analysis Of Variance ◽  
Science And Technology ◽  
Processing Method ◽  
State University ◽  
Normal Range ◽  
Significant Difference ◽  
Feeding Trials ◽  
Cassava Peels ◽  
Hematological Values

The experiment was carried out at Kebbi State University of Science and Technology, Aliero using thirty two (32) yearlings Uda Rams in two feeding trials ran concurrently. Sixteen (16) rams were used in each experiment with four treatments replicated four times in a completely randomized factorial design (2 × 4). The animal represents the replicates while the processing method (drying and ensiling) and the level of inclusion represents the treatments respectively. The level of inclusion are 0, 10, 20 and 30% dried cassava peels (DCP) and ensiled cassava peels (ECP) respectively. Data were collected in each trial on hematological characteristics. Data generated was subjected to analysis of variance and least significant difference (LSD) was used to separate the means. Hematological values of rams fed DCP were within the normal range while those fed ECP were below the normal range. The results shows significant difference (P<0.05) between dried and ensiled method of processing in terms of haemoglobin, MCH, WBC and MCV. Rams fed dried cassava peels had lower haemoglobin and PCV compared to normal range. It was concluded that there was no significant difference between rams fed dried cassava peels and those fed ensiled cassava peels at 30% level of inclusion.

Influence of microstructural defects and hydrostatic pressure on water absorption in composite materials for tidal energy

2018 ◽  
Vol 52 (21) ◽  
pp. 2899-2917 ◽  
Author(s):  
DM Grogan ◽  
M Flanagan ◽  
M Walls ◽  
SB Leen ◽  
A Doyle ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Composite Materials ◽  
Hydrostatic Pressure ◽  
Water Absorption ◽  
Glass Fibre ◽  
Tidal Energy ◽  
Operating Conditions ◽  
X Ray ◽  
Energy Devices ◽  
X Ray Computed

The lifespan and economic viability of tidal energy devices are constrained, in part, by the complex degradation of the tidal turbine blade materials due to prolonged immersion in a hostile sub-sea environment. Seawater penetration is a significant degradation mechanism in composite materials. This work aims to investigate the influence of microstructure and hydrostatic pressure on water absorption in four polymer composites which are candidate materials for use in tidal energy devices. These materials are: a glass fibre powder epoxy, a carbon fibre powder epoxy, glass fibre Ampreg epoxy and a chopped fibre glass fibre Polyether Ether Ketone. X-ray computed tomography is used to characterise the voids, resin-rich areas and other manufacturing defects present in each material. These defects are known to significantly alter the rate of moisture diffusion, as well as the total uptake of water at saturation. The samples are then exposed to accelerated water aging and hydrostatic pressurisation in order to simulate a range of expected sub-sea operating conditions. The material micro-structure, the matrix material and pressurisation level are shown to strongly influence both the moisture absorption rate and total water uptake. Significant volumetric changes are also noted for all samples, both during and after aging. X-ray computed tomography scans of specimens also provide a unique insight into the role of voids in storing water once a material has reached saturation.

C–O Ring Formation

2017 ◽  
Author(s):  
Tristan H. Lambert
Keyword(s):  
Science And Technology ◽  
State University ◽  
University Of Michigan ◽  
Colorado State University ◽  
Boston University ◽  
Chapel Hill ◽  
Chiral Phosphoric Acid ◽  
National University ◽  
University Of Bristol ◽  
The University

The enantioselective bromocyclization of dicarbonyl 1 to form dihydrofuran 3 using thiocarbamate catalyst 2 was developed (Angew. Chem. Int. Ed. 2013, 52, 8597) by Ying-Yeung Yeung at the National University of Singapore. Access to dihydrofuran 5 from the cyclic boronic acid 4 and salicylaldehyde via a morpholine-mediated Petasis borono-Mannich reaction was reported (Org. Lett. 2013, 15, 5944) by Xian-Jin Yang at East China University of Science and Technology and Jun Yang at the Shanghai Institute of Organic Chemistry. Chiral phosphoric acid 7 was shown (Angew. Chem. Int. Ed. 2013, 52, 13593) by Jianwei Sun at the Hong Kong University of Science and Technology to catalyze the enantioselective acetalization of diol 6 to form tetrahydrofuran 8 with high stereoselectivity. Jan Deska at the University of Cologne reported (Org. Lett. 2013, 15, 5998) the conversion of glutarate ether 9 to enantiopure tetrahy­drofuranone 10 by way of an enzymatic desymmetrization/oxonium ylide rearrange­ment sequence. Perali Ramu Sridhar at the University of Hyderabad demonstrated (Org. Lett. 2013, 15, 4474) the ring-contraction of spirocyclopropane tetrahydropyran 11 to produce tetrahydrofuran 12. Michael A. Kerr at the University of Western Ontario reported (Org. Lett. 2013, 15, 4838) that cyclopropane hemimalonate 13 underwent conver­sion to vinylbutanolide 14 in the presence of LiCl and Me₃N•HCl under microwave irradiation. Eric M. Ferreira at Colorado State University developed (J. Am. Chem. Soc. 2013, 135, 17266) the platinum-catalyzed bisheterocyclization of alkyne diol 15 to fur­nish the bisheterocycle 16. Chiral sulfur ylides such as 17, which can be synthesized easily and cheaply, were shown (J. Am. Chem. Soc. 2013, 135, 11951) by Eoghan M. McGarrigle at the University of Bristol and University College Dublin and Varinder K. Aggarwal at the University of Bristol to stereoselectively epoxidize a variety of alde­hydes, as exemplified by 18. The amine 20-catalyzed tandem heteroconjugate addition/Michael reaction of quinol 19 and cinnamaldehyde to produce bicycle 21 with very high ee was reported (Chem. Sci. 2013, 4, 2828) by Jeffrey S. Johnson at the University of North Carolina, Chapel Hill. Quinol ether 22 underwent facile photorearrangement–cycloaddition to 23 under irradiation, as reported (J. Am. Chem. Soc. 2013, 135, 17978) by John A. Porco, Jr. at Boston University and Corey R. J. Stephenson, now at the University of Michigan.

The Evolution of X-Ray Instrumentation at Rich. Seifert & Co.

1995 ◽  
Vol 39 ◽  
pp. 47-56
Author(s):  
A. Haase
Keyword(s):  
World War Ii ◽  
World War I ◽  
Science And Technology ◽  
German Language ◽  
X Rays ◽  
X Ray Diffraction ◽  
World War ◽  
Executive Management ◽  
X Ray ◽  
Max Von Laue

To facilitate orientation in time, some selected events will be briefly presented. Approximately five hundred years ago, Columbus discovered America. One hundred years ago, on November 8th, 1895, Wilhelm Conrad R6ntgen discovered the X-rays which in the German language are called after him. In 1912 Max von Laue conducted the first X-ray diffraction experiment. In 1892 Richard Seifert Sr. founded the Electrotechnical Plant in Hamburg. After World War I (1914-1918) the company founder gradually handed the firm over to his son Richard Seifert Jr. After his son had completed studies in physics and electrical engineering he conducted pioneering experiments on the application of X-rays in science and technology. From the very beginning, X-ray equipment was produced in the three fields of medicine, science and technology. It was only ten years after World War II (1939-1945) that the line of medical equipment was discontinued and the daughter [1] as a member of the third generation gradually took over executive management tasks.

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