Multienzyme Mimicking Cascade Mn3O4 Catalyst to Augment Reactive Oxygen Species Elimination and Colorimetric Detection: A Study of Phase Variation upon Calcination Temperature.

Over decades, nanozyme has served as a better replacement of bioenzymes and fulfills most of the shortcomings and intrinsic disadvantages of bioenzymes. Recently, manganese-based nanomaterials have been highly noticed for redox-modulated multienzyme mimicking activity and wide applications in biosensing and biomedical science. The redox-modulated multienzyme mimicking activity was highly in tune with their size, surface functionalization, and charge on the surface and phases. On the subject of calcination temperature to Mn3O4 nanoparticles (NPs), its phase has been transformed to Mn2O3 NPs and Mn5O8 NPs upon different calcination temperatures. Assigning precise structure-property connections is made easier by preparing the various manganese oxides in a single step. The present study has focused on the variation of multienzyme mimicking activity with different phases of Mn3O4 NPs, so that they can be equipped for multifunctional activity with greater potential. Herein, spherical Mn3O4 NPs have been synthesized via a one-step coprecipitation method, and other phases are obtained by direct calcination. The calcination temperature varies to 100, 200, 400, and 600 °C and the corresponding manganese oxide NPs are named M-100, M-200, M-400, and M-600, respectively. The phase transformation and crystalline structure are evaluated by powder X-ray diffraction and selected-area electron diffraction analysis. The different surface morphologies are easily navigated by Fourier transform infrared, field-emission scanning electron microscopy, and high-resolution transmission electron microscopy analysis. Fortunately, for the mixed valence state of Mn3O4 NPs, all phases of manganese oxide NPs showed multienzyme mimicking activity including superoxide dismutase (SOD), catalase, oxidase (OD), and peroxidase; therefore, it offers a synergistic antioxidant ability to overexpose reactive oxygen species. Mn3O4 NPs exhibited good SOD-like enzyme activity, which allowed it to effectively remove the active oxygen (O2•-) from cigarette smoke. A sensitive colorimetric sensor with a low detection limit and a promising linear range has been designed to detect two isomeric phenolic pollutants, hydroquinone (H2Q) and catechol (CA), by utilizing optimized OD activity. The current probe has outstanding sensitivity and selectivity as well as the ability to visually detect two isomers with the unaided eye.

Appropriate Infant and Young Child Feeding Practices in an Emergency for Non-Breastfed Infants Under Six Months: The Rohingya Experience.

BACKGROUND: Since 25 August, 2017 over 693,000 Rohingya have been forced from Myanmar due to mass violence, seeking refuge in neighboring Bangladesh. Nutritional surveys during 2017 revealed worrying levels of malnutrition and poor infant feeding practices, including high numbers of infants not exclusively breastfeeding. Infants under 6 months who are not exclusively breastfed are particularly vulnerable to morbidity and mortality and require specialized feeding support, especially in emergency contexts. RESEARCH AIM: To describe Save the Children International's experiences supporting wet nursing, relactation, and artificial feeding for non-breastfed infants under 6 months in the Rohingya Response, Bangladesh. METHODS: A retrospective analysis was conducted of routine program data and documentation from Save the Children International's infant and young child feeding in emergencies interventions for the Rohingya Response, Bangladesh, from November 2017 to April 2018. The study population were infants under 6 months identified as not breastfed during the initial assessment (N = 15). RESULTS: Although wet nursing was attempted with all infants, it was successful with 6 (40%) of the infants. Additionally, 1 (6.7%) infant's mother was able to successfully relactate. The remaining infants ended up requiring feeding with human milk substitutes. CONCLUSION: Gaps exist in operational guidance to support non-breastfed infants with wet nursing and relactation in emergency settings, as well as on how to operationalize safe human milk substitute programming in line with national policies and regulations. There is an urgent need to address this gap to protect the lives of non-breastfed infants in emergencies worldwide.

Detection of torque teno sus virus infection in Indian pigs.

BACKGROUND AND AIM: Torque teno viruses (TTVs) are circular, single-stranded DNA viruses, which infect a wide range of animals including livestock and companion animals. Swine TTVs (torque teno sus viruses [TTSuVs]) are thought to act as a primary or coinfecting pathogen in pathological conditions such as porcine dermatitis and nephropathy syndrome and post-weaning multisystemic wasting syndrome. So far, the presence of the virus has not been reported in India. Considering that TTSuVs have the potential to cross the species barrier into humans and that pork consumption is common in North-Eastern states of India, the current study aims to investigate the presence of TTSuV in the Indian pig population. MATERIALS AND METHODS: A total of 416 samples were collected during 2014-2018, from both apparently healthy pigs and also from pigs suspected of having died from classical swine fever and/or porcine reproductive and respiratory syndrome. These samples were screened for TTSuV infection by polymerase chain reaction (PCR) and DNA sequencing techniques. RESULTS: The presence of the virus was confirmed in 110 samples from 12 different states of India. Phylogenetic analysis of the nucleotide sequences obtained from the PCR products indicated the presence of viruses of both Iotatorquevirus and Kappatorquevirus genera in India. CONCLUSION: The study is the first report on the presence of TTSuVs in India and highlights the circulation of both genera of the virus in the country.

Physicochemical investigations on non-covalent interactions between Padimate O and cyclodextrin receptors in both solution and solid states.

Ultraviolet B (UV-B) radiation is very harmful to human body. It can cause serious health problem mainly skin cancer, sunburn and photo-aging. Padimate O (PMO) is a sunscreen agent. The aim of this work is to form inclusion complexes with α-cyd and ß-cyd in both aqueous environment and solid state that established by UV-Vis, FTIR spectroscopy, mass spectra, powder X-ray diffraction pattern and as α-cyd and ß-cyd are known to us as good drug vehicles, hence, the experimental results suggest that they can be used as good sunscreen agent carrier and photostabilizer additive for increasing the photostability and other properties of PMO. In solution phase, UV-Vis spectroscopy demonstrated that the entire process of formation of complexes is observed with 1:1 stoichiometry which is further justified by mass spectra. Thermodynamic parameters support the whole process in both cases and it is revealed that ß-cyd forms more firmly inclusion complex than α-cyd with PMO. Successful formation of solid inclusion complexes is supported by FTIR spectroscopy and powder-XRD. The enhancement of the thermal stability of the α-cyd/PMO and ß-cyd/PMO complexes is demonstrated by TGA study.

Abdominal Tuberculosis: A Diagnostic Dilemma.

According to the World Health Organization, more than 2 billion people are estimated to be infected with tuberculosis (TB) and approximately 95% of tuberculosis cases occur in developing countries. Extrapulmonary forms of tuberculosis constitute approximately one-sixth of all cases and the prevalence of extrapulmonary tuberculosis (TB) seems to be rising, particularly due to increasing prevalence of acquired immunodeficiency syndrome (AIDS). In patients with extrapulmonary TB, abdomen is involved in 12% of patients. Gastrointestinal involvement is found in 66 to 75% of abdominal cases, with the terminal ileum and the ileocecal region being the most common sites of involvement. Here, we report a case of abdominal TB. HOW TO CITE THIS ARTICLE: Tarafder AJ, Al-Mahtab M, Das SR, Karim R, Rahaman H, Rahman S. Abdominal Tuberculosis: A Diagnostic Dilemma. Euroasian J Hepato-Gastroenterol 2015;5(1):57-59.

Two novel domino reactions triggered by thiyl-radical addition to vinylcyclopropyl oxime ether.

Two domino reactions of vinylcyclopropyl oxime ethers involving (i) thiyl radical addition, ring-opening, and hydroxylation reactions and (ii) thiyl radical addition, ring-opening, and aldol-type reactions were developed.