It is with great pleasure that I write this editorial to welcome you to the first issue of this new International journal, “Pakistan Biomedical Journal” (PBMJ). The topics covered by the journal are certainly broad and interesting. Biomedical science is a collection of applied sciences that help us understand, research, and innovate within the field of healthcare. It includes disciplines like molecular biology, clinical virology, bioinformatics, and biomedical engineering, among others. It's designed to apply the biological sciences to advance not only individual health but also the area of public health. Biomedical Research can help health professions better understand things like the human body and cell biology, making advances in our understanding of epidemics, health initiatives, and human health in the age of longer life expectancy. It aids our understanding of infectious disease and provides research opportunities into some of our most troubling health issues. The journal will continue to publish high quality clinical and biomedical research in health and disease later in life. Peer review will remain a vital component of our assessment of submitted articles.I am very happy to have a team of excellent editors and editorial board members from the top international league covering in depth the related topics. They will ensure the highest standards of quality for the published manuscripts and, at the same time, keep the process time as short as possible. We hope to bring best researches in the field of biomedical sciences that may serve as a guideline in health awareness, understanding the mechanisms and its management in future. We definitely look forward to receiving your excellent studies to making PBMJ synonymous with high quality in the biomedical science domain.
This research work consists of synthesis of various thiosemicarbazides and 1,2,4-triazole derivatives and screening of their biological activities. All compounds were fully characterized by various spectroscopic techniques, such as 1H-NMR, 13C-NMR, and EIMS/FABMS. Melting points of all compounds were also recorded. This dissertation consists of two chapters based on the extensive literature and research findings regarding the four libraries of synthetic compounds. Each chapter has its own compounds numbering, tables, figures, schemes, and references. Chapter-1 deals with general introduction of thiosemicarbazides, their previous synthetic strategies, and their biological activites. It also describes general introduction of biological activities and their bioassays. It is comprised of the synthesis of various derivatives of 4chlorophenyl substituted thiosemicarbazides 33-57 (Part A), and nicotinic/isonicotinic substituted thiosemicarbazides 60-84 (Part B) and their in vitro activities against urease, α-glucosidase, and acetylcholinesterase (AChE) enzymes. Compounds 35, 42, 46, 49, 61, 67, 77, and 79 were new derivatives while rest of the compounds were previously known. Except few all synthetic compounds showed superior activity than the standard thiourea. Compound 57 was sixty six fold, compound 42 was nineteen fold, compounds 35, 38, 52 were about ten fold and compounds 69 and 81 were eighteen fold more potent than the standard thiourea. Some synthetic thiosemicarbazides showed weak activity against αglucosidase enzyme while showed no activity against acetylcholinesterase enzyme. Chapter-2 deals with general introduction to 1,2,4-triazole, their previous synthetic strategies, and their biological activites. It is also composed of the synthesis of various analogues of 4-chlorophenyl substituted 1,2,4-triazole derivatives 156-180 (Part A), and synthesis of thioether derivatives of 1,2,4-triazoles 181-192 (Part B) by four steps reaction and their in vitro activities against urease, α-glucosidase, and AChE enzymes. Compounds 158, 162, 163, 165, 167, and 169-173 were new derivatives, while rest of the compounds were previously reported by others. 1,2,4-Triazole derivatives 156-180 showed good to excellent urease inhibitory activities. Compounds 156, 163, 166, and 176 were more potent compounds, particularly, compound 176 showed 28-fold more potent activity than the standard thiourea. Compounds 156, 162, 163, 166, 175, and 179 exhibited weak αglucosidase inhibitory activity, while 1,2,4-triazole derivatives 156-180 showed no activity against AChE enzyme. Thioether derivatives 181-192 showed a weak inhibitory activity against urease enzyme, while good to weak inhibitory activity against α glucosidase enzyme, particularly, thioether derivatives 182 and 185 were found to be the more potent than the standard acarbose. All 1,2,4-triazole derivatives 156-180 showed no activity, while thioether derivatives 181-192 showed weak inhibitory activity against AChE enzyme.