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The spatial structure of ACTH-(6-9)-PGP molecule has been investigated using theoretical conformational analysis method. Amino acid sequence of the N-terminal pentapeptide fragment of His-Phe-Arg-Trp-Pro of this molecule conforms to the fragment 6-9 of ACTH hormone. Calculations of conformational states of this molecule are carried out regarding nonvalent, electrostatic and torsional interactions and the energy of hydrogen bonds. The spatial structure of the His-Phe-Arg-Trp-Pro-Gly-Pro molecule was estimated on the low–energy conformations of the N-terminal tetrapeptide fragment His-Phe-Arg-Tr..read more
Namiq Akhmedov, Leyla Agayeva, Gulnara Akverdieva, Rena Abbasli and Larisa Ismailova
- 08 Oct 2021
- Volume Detail: VOLUME 43, NO5, OCT-2021
- Pages: 500
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The co-polymerization of polyaniline is one of the most important methods used to improve the electrical activity and thermal stability of polyaniline. Previously, electrochemical co-polymerization of phenol and aniline was performed on 304 stainless steel anodes. In this study, we present the co-polymerization of aniline and phenol chemically at laboratory temperature in an acidic medium with ammonium pyrosulfate as an oxidant. The Scanning Electron Microscopy (SEM) analysis of poly(aniline-co-phenol) sample shows a rough (non-smooth) surface with crystalline particles with microscopic diamet..read more
Juhaina Alghdir and Ahmad Falah
- 08 Oct 2021
- Volume Detail: VOLUME 43, NO5, OCT-2021
- Pages: 505
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Biocompatibilities of nanoparticles are crucial for biomedical applications. Diverse silver nanoparticles (5 nm, 10 nm, 20 nm, 40 nm and 80 nm) caped with citrate and polyvinylpyrrolidone (PVP) were synthesized and primed their protein coronas. Nanoparticles were characterized with UV-visible spectroscope, Dynamic light scattering (DLS) and Transmission Electron Microscope (TEM). Comparative biocompatibilities were verified and recorded using MTS techniques. Human hepatoma carcinoma HepG2) cell line was used for measuring cytotoxic effect by MTS assays. Deleterious and comparative behaviors of..read more
Abdul Hameed, Komal Saba, Raheela Taj, Andaleeb Azam, Rohullah and Aamina Paracha
- 08 Oct 2021
- Volume Detail: VOLUME 43, NO5, OCT-2021
- Pages: 513
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The preparation of vegetable oil-water emulsions stabilized by soybean protein and microgel is described. The soybean protein was obtained from n-hexane-defatted soybean powder using a Soxhlet extractor. Using equal volumes of oil and water, vegetable oil-water emulsions were formed either by handshaking the mixture or homogenizing the mixture using a Lab homogenizer. The emulsion was characterized using a drop test and microscopy observation. The drop test shows that the preferred emulsion is vegetable oil-in-water (o/w). The effect of salt and emulsifier concentration on the stability and em..read more
Samuel Olalekan Olusanya, Gbenga Joseph Adebayo, Samuel Olutayo. Afolabi and Adewumi Oluwasogo Dada
- 08 Oct 2021
- Volume Detail: VOLUME 43, NO5, OCT-2021
- Pages: 520
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During this present study, we tested the adsorption performance of heavy metal ions; bivalent lead (Pb (II)) and the anionic dye (methyl orange (MO)) from model aqueous solutions with the ion exchange resin of the Amberlite®IRC-50 type. This performance was evaluated using inductively coupled plasma (ICP) and atomic absorption spectroscopy (AAS). The pH of the solution was adjusted to 6.5 for the bath temperature, the initial mass concentration of Pb (II) and MO was adopted at 20 mg/L, the mass of the resin-type adsorbent Amberlite®IRC-50 was taken at 0.1g and the adsorption capacity Qe was st..read more
Jaouad Bensalah, Mohamed Berradi, Amar Habsaoui, Omar Dagdag, Adblhay El Amri,
Omar El Khattabi, Ahmed Lebkiri and El Housseine Rifi
- 08 Oct 2021
- Volume Detail: VOLUME 43, NO5, OCT-2021
- Pages: 535
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In this work, the collagen hydrolysates with different molecular weights were successfully extracted from the limed hide waste, and used at the nutrient solutions for crop breeding. Firstly, using the single factor and orthogonal exp eriments, hydrolytic process parameters of limed hide waste were optimized for the Alcalase-based enzymatic and Ca(OH)2-based alkali, and alkali-enzyme methods that led to the corresponding collagen hydrolysates with different molecular weights. The obtained collagen hydrolysates were characterized by gel permeation chromatography (GPC), amino acid analysis, the i..read more
Li Zhao, Yanru Long and Haibin Gu
- 08 Oct 2021
- Volume Detail: VOLUME 43, NO5, OCT-2021
- Pages: 546
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This research article reports original experimental and modeling detail of kinetics of the electron transfer reaction between Co(II) and chlorate ions in acetic acid solution. Design of experiment methodology has been employed to elucidate the effects of temperature and initial concentrations of reactants on the rate of reaction. Levenberg-Marquardt method has been used to fit processed kinetic data (temperatures, initial concentrations of reactants, and concentrations and rates of production of Co(III)) on to various possible rate equations. This algorithm provides a proficient mean for compe..read more
Mahwish Mobeen Khan and Syed Mumtaz Danish Naqvi
- 08 Oct 2021
- Volume Detail: VOLUME 43, NO5, OCT-2021
- Pages: 559
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In this study, In Vitro antibacterial and antifungal activities of azo series based on transition metal complexes (Cu2+, Zn2+, Mn2+, Co2+ and Ni2+) with already our reported ligands named as; [(E)-1-(1, 3-dioxolan-2-yl)-2-phenyldiazene] (K-1), [(E)-1-(1, 3-dioxolan-2-yl)-2-(4-methylphenyl)diazene] (K-2), 2-[(E)-phenyl diazenyl]-1H-benzimidazole] (K-3), [(E)-1-(1, 3-dioxolan-2-yl)-2-(4-ethylphenyl)diazene] (K-4), and [(E)-1-(1, 3-dioxolan-2-yl)-2-(2-methylphenyl)-diazene] (K-5) were studied. FTIR 1H-NMR and mass spectrometric techniques were applied for interpretation of synthesized complexes. ..read more
Khalil Ahmad, Habib-ur-Rehman Shah, Areeba Ashfaq, Muhammad Ashfaq, Muhammad Kashif, Hafiza Ammara Naseem, Tariq Aziz, Sajidah Parveen and Hafsa and Imran Nazir
- 08 Oct 2021
- Volume Detail: VOLUME 43, NO5, OCT-2021
- Pages: 578
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In the present study, the crude polysaccharides from pomegranate peels (CPP) were prepared by compound enzyme-extraction technology, and the response surface methodology was used to optimize the extraction parameters. Box–Behnken design (BBD) was applied to estimate the effects of extraction temperature, extraction pH, and dosage of compound enzyme on the yield of CPP. A mathematical model with high fitness was obtained. Extraction temperature, extraction pH, and dosage of compound enzyme exhibited independent and interactive effects on CPP yield. CPP were purified by macroporous resin HP-20 a..read more
Chunlin Ke and Zuomei Li
- 08 Oct 2021
- Volume Detail: VOLUME 43, NO5, OCT-2021
- Pages: 587
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Excessive accumulation of free radicals can cause a variety of diseases. According to reports, chalcone has the activity of scavenging free radicals. In this study, we synthesized a chalcone derivative CZM-3-5 and evaluated its antioxidant activity using a chemical assessment method (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS•+) assay, 2,2-diphenyl-1-picrylhydrazyl (DPPH•) assay and total reducing antioxidant power (FRAP) assay) and a cell model of oxidative damage induced by hydrogen peroxide (H2O2). The chemical evaluation results show that the compound CZM-3-5 has good an..read more
Cen Xiang, Xiangshun Kong, Feng Gao, Yufan Zhao, Jiang Liu, Yuan Yuan and Yuou Teng
- 08 Oct 2021
- Volume Detail: VOLUME 43, NO5, OCT-2021
- Pages: 598
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