Boron from net charge acceptor to donor and its effect on hydrogen uptake by novel Mg-B-electrochemically synthesized reduced graphene oxide.

Hydrogen uptake (H-uptake) is studied in ball milled Mg-B-electrochemically synthesized reduced graphene oxide (erGO) nanocomposites at PH2 ≈ 15 bar, ~ 320 °C. B/C (weight ratio): 0, ~ 0.09, ~ 0.36, ~ 0.90 are synthesized maintaining erGO≈10wt %. B occupies octahedral interstices within Mg unit cell-revealed by electron density maps. Persistent charge donations from Mg and B to C appear as Mg-C (~ 283.2 eV), B-C (~ 283.3-283.9 eV) interactions in C-1s core X-ray photoelectron spectroscopy (XPS) at all B/C. At B/C > 0.09, charge reception by B from Mg yields Mg-B interaction. This net charge acceptor role of B renders it electron-rich and does not alter Mg unit cell size significantly. Despite charge donation to both C and B, the Mg charge is < + 2, resulting in long incubation times (> 5 h) at B/C > 0.09. At B/C≈0.09 the minimal Mg-B interaction renders B a charge donor, resulting in Mg-B repulsion and Mg unit cell expansion. Mg-C peak shift to lower binding energies (C-1s XPS), decreases incubation time to ~ 2.25 h and enhances H-uptake kinetics. Various atomic interactions influence the reduction of incubation time in H-uptake and increase its kinetics in the order: (Mg → C; B → C)B/C≈0.09, B: donor > (Mg → C)B/C=0 > (ternary Mg → B → C)B/C>0.09, B: acceptor.

Exploratory study on the operational issues faced in collection, transportation, and laboratory testing related to COVID-19 in remote areas of selected EAG states of North East and East India.

BACKGROUND: COVID-19 ongoing pandemic has proved beyond doubt that all countries in the world from high income to low- and middle-income countries were unprepared with under-diagnosed and underreported losses of precious human lives on already overstretched healthcare delivery infrastructure. Thus, the urgent need of the hour is to understand and identify the operational issues and challenges encountered in the sample collection process and also at the testing labs in order to respond at the earliest. This early and effective response will help not only to address the identified issues in the whole chain of sample collecting to test result communication but also it will help to improve the functioning of the entire system involved in this process. OBJECTIVES: The present study was undertaken to identify the issues faced during various steps involved in laboratory testing as part of the COVID-19 control activities in selected remote districts of North East and East India. Further, perceived adequacy of human resources, equipment, diagnostic kits, and other essential consumables including PPEs vis-a-vis the load of samples received from the catchment areas of the testing laboratories were also explored. METHODS: The study was a qualitative research using in-depth interview method to collect and collate the data from the chain of personnel involved in sample collection, storage, transportation, and testing by recorded telephonic interview by state-level collaborators as per the study protocol. The respondents were recruited from randomly selected sites of remote districts for sample collection, storage, transportation, and dedicated testing labs in six states of North East and Eastern India. The study findings were analyzed by two-dimensional scaling and hierarchical cluster analysis to get the collective picture involving transcription, preliminary data scrutiny, content analysis, and interpretation of the verbal IDI; classified and summarized by triangulation; free listing and pile sorting of suggestions. RESULTS: The entire laboratory testing related human resources has been working on war-footing round-the-clock to fulfil the expectation of the stakeholders and maintaining high quality despite the ever-increasing load of sample testing in both the public and private sectors. The findings indicated that the healthcare workers from all levels of laboratory diagnosis have taken it as a challenge to control the pandemic even with limitations of logistics to capacity building. Positive suggestions to improve laboratory services were to increase human resources, infrastructure, IT with the robust mechanism of monitoring and supervision. CONCLUSIONS: Upgradation of laboratory capacities and expertise in public health has become one of the points of concern to contain the COVID-19 pandemic of the new millennium.

Laparoscopic management of hydatid cyst in the lesser sac.

Hydatid cyst is a disease caused by Echinococcus granulosus. Various anatomical location of hydatid cyst has been described in literature. Liver is the most common site of hydatid cyst and lungs are the second most common site. Hydatid cyst of lesser sac is a rare entity. Here we present a rare case report of laparoscopic management of hydatid cyst in lesser sac.