Co-production of parabiotic metabolites by Lactobacillus acidophilus LA5 and Bifidobacterium animalis subsp. lactis BB12 in dairy effluents
Saber
Amiri
Department of Food Science and Technology, Faculty of Agriculture, Urmia University, Urmia, Iran
author
Mahmoud
Rezazadeh Bari
Department of Food Science and Technology, Faculty of Agriculture, Urmia University, Urmia, Iran
author
Mohammad
Alizadeh Khaledabad
Department of Food Science and Technology, Faculty of Agriculture, Urmia University, Urmia, Iran
author
Reza
Rezaei Mokarram
Department of Food Science and Technology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
author
Mahmoud
Sowti Khiabani
Department of Food Science and Technology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
author
text
article
2021
eng
In this study, the effects of initial pH (5 − 7), temperature (30 − 38 ◦C) and incubation time (12 − 48 h), as well as yeast extract and free linoleic acid concentrations, respectively (0 – 4 %) and (0 − 400 µL), on the co-production of conjugated linoleic acid (CLA), exopolysaccharides (EPSs) and bacteriocins (BACs) by Lactobacillus acidophilus LA5 and Bifidobacterium animalis subsp. lactis BB12 and their biomass in cheese whey and milk permeate were evaluated. The results showed that biomass, CLA, EPSs and BACs activity ranged Log 0.80 - Log 8.67 g.L-1, 3.08-107.95 µg.mL-1, 107.75-351.92 mg.L-1 and 9.29-14.62 mm, respectively. Yeast extract concentration was the only factor with the positive significant effect on biomass and parabiotic metabolites i.e. its increasing caused to an increase in both of them (p <0.05). The temperature significantly affected the production of biomass and CLA; its increasing resulted in increasing both (p <0.05). The initial pH had significant, but different, effects on EPSs and BACs production (p <0.05) i.e. EPSs and BACs production decreased and increased, respectively, as a result of increased initial pH. Increasing free linoleic acid concentration from 0 up to 400 µL led to increased CLA biosynthesis. Higher biomass, EPSs and BACs are produced in cheese whey, compared with milk permeate, but CLA produced in milk permeate was higher than that obtained in cheese whey. B. animalis BB12 produced more biomass, CLA and EPSs in comparison to L. acidophilus LA5. However, these probiotics had no statistical difference in terms of producing BACs. This work successfully demonstrated the co-production potential of CLA, EPSs and BACs by two commercial probiotics in dairy effluents.
Chemical Review and Letters
Eurasian Science Society (ESS)
2676-7279
4
v.
2
no.
2021
66
76
https://www.chemrevlett.com/article_122364_841471b9640184a6ca83176def339bd5.pdf
dx.doi.org/10.22034/crl.2021.253739.1086
Bulk microstructure evolution of two high Hf–containing nickel–based alloys during exposure at temperatures from 1100 to 1250°C
Patrice
BERTHOD
Institut Jean Lamour, University of Lorraine, Nancy, France
author
Dame Assane
Kane
Faculty of Science and Technologies, University of Lorraine, Vandoeuvre-les-Nancy, France
author
text
article
2021
eng
Two Hf–poorest versions of a high performance chromia–forming nickel–based polycrystalline cast alloy reinforced by HfC carbides were investigated by replacing more or less hafnium by tantalum to reduce production cost. After elaboration, microstructure control, thermal analysis and exposures at temperature were carried out on samples cut in the obtained ingots. The as–cast microstructures of the two alloys are similar to the initial alloy one but their behaviors at the three considered high temperatures (1100, 1200 and 1250°C) were more or less different: more fragmentation of he MC carbides and precipitation of chromium carbides during aging. Some decreasing effects on the room temperature hardness were observed, and one can suppose that the high temperature mechanical properties of these two {(Hf,Ta)C carbides}–containing alloys derived from the HfC–strengthened initial one may be lowered.
Chemical Review and Letters
Eurasian Science Society (ESS)
2676-7279
4
v.
2
no.
2021
77
84
https://www.chemrevlett.com/article_124866_54c51eaeb6686cccd2715872a354c054.pdf
dx.doi.org/10.22034/crl.2021.266573.1100
Studies on Some Mechanical Properties of PVC-Wood Fiber Composite
David
Arthur
Department of Pure and Applied Chemistry, University of Maiduguri, Nigeria
author
Danzarami
Danlami
Department of Chemistry ABU zaria
author
Emmanuel
Uwaiya
Department of Chemistry Ahmadu Bello University Zaria
author
Augustina
Aroh
Department of Chemistry ABU Zaria
author
text
article
2021
eng
In this study some mechanical properties of PVC-Wood fibre composite were investigated. The wood fibre was gotten from a mahogany tree. The sample was moulded and shaped at a temperature of 150oC using a hadraulic hot press and pressure of 3bar for 5mins and the mechanical properties were studied base on varying the wood fibre contents from 0% to 50%. The hardness test carried out using the durometer hardness tester show a decrease in the hardness of the composite as the wood fibre is varied from 0%, 10%, 20%, 30% 40% and 50% and the impact strength of the composite decreases as well in that order. The tensile strength conducted using the Mensato Tensometer show a decrease at 10% wood fibre, while an increase in the wood fibre to 20% show an increase in the tensile strength on further addition of the wood fibre a decrease is noticed. This decrease in tensile strength decreases the strain of the PVC-wood fibre composite and hence increasing the modulus of elasticity of the PVC-wood fibre composite as the wood fibre is been added.
Chemical Review and Letters
Eurasian Science Society (ESS)
2676-7279
4
v.
2
no.
2021
85
91
https://www.chemrevlett.com/article_122363_65533d5519988db8f83f49a61047a21b.pdf
dx.doi.org/10.22034/crl.2021.242652.1076
Pyrolysis of plastic wastes as a way of obtaining valuable chemical raw materials (n1)
Krystian
Leski
Faculty of Chemical Engineering and Technology, Cracow University of Technology, Cracow, Poland
author
Gabriela
Berkowicz-Płatek
Faculty of Chemical Engineering and Technology, Cracow University of Technology, Cracow, Poland
author
text
article
2021
eng
This article presents a mini-review of the literature on the laboratory scale pyrolysis of selected plastic waste. Among the various types of polymer materials polyolefins (PE and PP), as well as polystyrene (PS), polyoxymethylene (POM), and polyvinyl chloride (PVC), were selected. The paper highlights valuable compounds and chemical raw materials can be obtained by pyrolyzing the waste polymers.
Chemical Review and Letters
Eurasian Science Society (ESS)
2676-7279
4
v.
2
no.
2021
92
97
https://www.chemrevlett.com/article_128144_bd1dbc5a78af5f6a5082d707783e67ac.pdf
dx.doi.org/10.22034/crl.2021.272418.1101
Plant Mediated Synthesis of CdS Nanoparticles, their characterization and application for photocatalytic degradation of toxic organic dye
Amir
Ullah
Department of Chemistry, Hazara University Mansehra 21120, KPK, Pakistan
author
Sufian
Rasheed
HEJ Research Institute of Chemistry, University of Karachi, Sindh, Pakistan
author
Irfan
Ali
Department of Chemistry, Hazara University Mansehra 21120, KPK, Pakistan
author
Niamat
Ullah
Department of Chemistry, Government Post Graduate College Kohat, Khyber Pakhtunkhwa, Pakistan
author
text
article
2021
eng
In this work, environmentally friendly and cheap method for the synthesis of CdS nanoparticles for the first time using extract of Dicliptera Roxburghiana is presented. The present method is found to be reproducible and rapid. Structural analysis is carried out by UV-visible, FTIR, XRD, EDX, SEM, and TEM. XRD and TEM analysis revealed that the nanoparticles have spherical shape and size in the range of 2.5-8nm. FTIR studies showed the presence of functional groups which belong to the phytochemicals of plant extract that surrounds the nanoparticle preventing them from agglomeration. Thus the prepared CdS NPs exhibit excellent stability even after 2 months. The optical band gap was calculated using Tauc Plot i.e. 3.31 eV. Their activity as photocatalysts against an aqueous solution of methylene blue degradation under solar irradiation in a comparative manner is also reported and the particle has a % degradation of 87.12% in just 120 minutes under solar light irradiation.
Chemical Review and Letters
Eurasian Science Society (ESS)
2676-7279
4
v.
2
no.
2021
98
107
https://www.chemrevlett.com/article_128669_5da656033d1de9c9333241a2d097acf0.pdf
dx.doi.org/10.22034/crl.2021.262754.1097
Computational techniques in designing a series of 1,3,4-trisubstituted pyrazoles as unique hepatitis C virus entry inhibitors
Stephen
Ejeh
52 Abba Zuru closed Area F ABU Zaria.
author
Adamu
Uzairu
Department of Chemistry, Faculty of Physical Science, Ahmadu Bello University, Zaria-Nigeria
author
Gideon
Shallangwa
Department of Chemistry, Faculty of Physical Science, Ahmadu Bello University, Zaria-Nigeria
author
Stephen
Abechi
Department of Chemistry, Faculty of Physical Science, Ahmadu Bello University, Zaria-Nigeria
author
text
article
2021
eng
In this study, we developed a QSAR model for studying the antiviral activity of 1,3,4-trisubstituted pyrazoles derivatives on hepatitis C virus infected in human HuH-7 cell lines. We employed random analysis to split the data sets. Statistically robust model was generated with R2, Q2 and R2pred values of 0.777, 0.731 and 0.774 respectively. The reliability of this model was confirmed by acceptable validation parameters, and this model also fulfilled the Golbraikh and Tropsha standard model conditions. Through the evaluation of selected molecular descriptors we observed that, topological charge index of order 4 (GGI4), mean topological charge index of order 1 (JGI1), octanol water partition coefficient (XlogP), 3D topological distance based autocorrelation lag5/weighted by polarizabilities (TDB5p) and total molecular surface area (FPSA-2) are the molecular properties determining biological activities of the study compounds, which shed light on the vital features that aid in the design of unique potent hepatitis C virus entry inhibitors using computer-aided drug design tools.
Chemical Review and Letters
Eurasian Science Society (ESS)
2676-7279
4
v.
2
no.
2021
108
119
https://www.chemrevlett.com/article_125292_150ab3d997c34f179d0f69cab5c1bcf9.pdf
dx.doi.org/10.22034/crl.2021.248725.1079
Ginger intercalated sodium montmorillonite nano clay: assembly, characterization, and investigation antimicrobial properties
Milad
Edraki
Polymer Department, Technical Faculty, South Tehran Branch, Islamic Azad University, Tehran, Iran
author
Issa
Mousazadeh Moghaddampour
Department of Chemistry, Faculty of Science, University of Guilan, Rasht, Iran, P.O. Box
41635-19141
author
Ebrahim
Alinia-Ahandani
Department of Biochemistry, Payame Noor University, Tehran, P.O. Box 19395-3697, Iran
author
Mohammad
banimahd keivani
Department of Chemistry, Payame Noor University (PNU), P.O. Box: 19395-4697, Tehran, Iran
author
Milad
Sheydaei
Faculty of Polymer Engineering, Sahand University of Technology, P.O. Box 51335-1996, Tabriz, Iran
author
text
article
2021
eng
In this work, we have successfully incorporated ginger particles into the sodium montmorillonite (Na+-MMT) structure. A new nanoparticles (G-MMT) were characterized using Fourier transform infrared (FT-IR) spectroscopy, ultraviolet-visible-near infrared (UV-VIS-NIR), X-ray diffraction analysis (XRD), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). Also, the antimicrobial properties of G-MMT nanoparticles were investigated using agar diffusion method. The results showed that the spherical particles of ginger were placed between the layers, and also slightly on the surface. Montmorillonite (MMT) layers, such as heat shields, protect the ginger from degradation. The results of antibacterial test showed that G-MMT inhibits 8 lethal types of gram-positive and gram-negative bacteria, as well as one type of yeast. Due to the antibacterial properties of G-MMT and the fact that ginger is protected at high temperatures, this nanoparticle can have a suitable place in various applications.
Chemical Review and Letters
Eurasian Science Society (ESS)
2676-7279
4
v.
2
no.
2021
120
129
https://www.chemrevlett.com/article_129053_fa242c7fbcb200c566df9425eca2a346.pdf
dx.doi.org/10.22034/crl.2021.273340.1103