Numerous studies based on mathematical models and tools indicate that there is a strong inherent relationship between the chemical properties of the chemical compounds and drugs with their molecular structures. In the last two decades, the graph-theoretic techniques are frequently used to analyse the various physicochemical and structural properties of the molecular graphs which play a vital role in chemical engineering and pharmaceutical industry. In this paper, we compute Zagreb indices of the generalized sum graphs in the form of the different indices of their factor graphs, where generalized sum graphs are obtained under the operations of subdivision and strong product of graphs. Moreover, the obtained results are illustrated with the help of particular classes of graphs and analysed to find the efficient subclass with dominant indices.

Muhammad Javaid

Saira Javed

Abdulaziz Mohammed Alanazi

Majdah R. Alotaibi

Computing Analysis of Zagreb Indices for Generalized Sum Graphs under Strong Product

Shewanella putrefaciens is a specific spoilage bacterium for fish during cold storage. To better understand the molecular mechanisms of cold stress adaptation of S. putrefaciens, tandem mass tag- (TMT-) based quantitative proteomic analysis was performed to detect the effects of cold stress on protein expression profiles in S. putrefaciens which had been cultivated at 4&#xb0;C and 30&#xb0;C, respectively. A total of 266670 peptide spectrum matching numbers were quantified proteins after data analysis. Of the 2292 proteins quantitatively analyzed, a total of 274 were found to be differentially expressed (DE) under cold stress compared with the nonstress control. By integrating the results of Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses, 9 common KEGG terms were found notable for the cold-responsive proteins. Generally, the DE proteins involved in carbohydrate, amino acid, and fatty acid biosynthesis and metabolism were significantly upregulated, leading to a specific energy conservation survival mode. The DE proteins related to DNA repair, transcription, and translation were upregulated, implicating change of gene expression and more protein biosynthesis needed in response to cold stress.

Xin Gao

Peiyun Li

Jun Mei

Jing Xie

TMT-Based Quantitative Proteomics Analysis of the Fish-Borne Spoiler Shewanella putrefaciens Subjected to Cold Stress Using LC-MS/MS

The chemical composition and physicochemical properties of hexane and ethyl acetate extracts of skin, juice, and seeds of Opuntia dillenii fruit collected from three Moroccan regions (Oujda, Nador, and Essaouira) were studied. The study revealed that the seed oil extracts presented the highest yield of 13.12&#x0025;, followed by the skin fraction (1.77&#x0025;) and the juice extract (0.49&#x0025;). The evaluation of fatty acid compositions using GC-MS analysis revealed the presence of linoleic acid as a dominating unsaturated fatty acid with a value of 72.39&#x0025;, followed by palmitic acid, oleic acid, and stearic acid in all localities. Otherwise, the juice extract of Oujda locality was richer in margaric acid (37.41&#x0025;), followed by Essaouira skin extract (10.7&#x0025;) and Oujda seed extract (6.18&#x0025;). However, the campesterol was detected only in trace in the juice extract. The physicochemical properties of O. dillenii seed oils such as acid value, peroxide value, ester value, pH value, saponification value, density, and refractive index were all found to be in good agreement with the quality criteria for pure and fresh oils. In addition, principal component analysis (PCA) and hierarchical cluster analysis (HCA) were implemented to compare the difference in the chemical composition of the different O. dillenii extracts.

EL Hassania Loukili

Farid Abrigach

Mohamed Bouhrim

Mohamed Bnouham

Marie-laure Fauconnier

Mohammed Ramdani

Chemical Composition and Physicochemical Analysis of Opuntia dillenii Extracts Grown in Morocco

An atomic implantation method was used to modify diatomite with CuCl. The CuCl/diatomite samples were characterized by different techniques, including FTIR, XRD, BET, SEM-TEM, EDX, and CO-TPR. Characterization results revealed the formation of CuCl particles of 50&#x2013;60&#x2009;nm highly dispersed on diatomite surface. CO adsorption measurements showed that 2CuCl/diatomite exhibits the highest CO adsorption capacity among all CuCl-modified samples with diatomite. Its CO adsorption capacity of 2.96&#x2009;mmol/g at 30&#xb0;C is 10 times higher than that of unmodified diatomite (0.29&#x2009;mmol/g). The CO adsorption on CuCl-modified diatomites was found to fit well with the Langmuir&#x2013;Freundlich model.

Manh B. Nguyen

Tuyen V. Nguyen

Giang H. Le

Trang T. T. Pham

Khu Le Van

Giang T.T. Pham

Tung Ngoc Nguyen

Quang Vinh Tran

Tuan A. Vu

High CO Adsorption Performance of CuCl-Modified Diatomites by Using the Novel Method &#x201c;Atomic Implantation&#x201d;

Analytical Chemistry

Agricultural Chemistry

Environmental Chemistry

Food Chemistry

Geochemistry

Inorganic Chemistry

Medicinal Chemistry

Materials Chemistry

Nuclear Chemistry

Organometallic Chemistry

Organic Chemistry

Physical Chemistry

Petroleum Chemistry

Theoretical Chemistry

biochemistry

About this journal

Journal of Chemistry publishes original research articles as well as review articles on all aspects of fundamental and applied chemistry, including biological, environmental, forensic, inorganic, organic, physical and theoretical.

Journal profile

Meet the editorial board

Journal of Chemistry maintains an Editorial Board of practicing researchers from around the world, to ensure manuscripts are handled by editors who are experts in the field of study.

Editor spotlight

Submit your proposal

Do you think there is an emerging area of research that really needs to be highlighted? Or an existing research area that has been overlooked or would benefit from deeper investigation? Raise the profile of a research area by leading a Special Issue.

Special Issues

Author guidelines

Editorial board

Databases and indexing

Journal of Chemistry - Table of contents 2021

title

Journal of Chemistry publishes original research articles as well as review articles on all aspects of fundamental and applied chemistry, including biological, environmental, forensic, inorganic, organic, physical and theoretical.

Journal of Chemistry