4 research outputs found
Optical Absorption in B Cluster: A Time-Dependent Density Functional Approach
The linear optical absorption spectra of three isomers of planar boron
cluster B are calculated using time-dependent spin-polarized density
functional approach. The geometries of these cluster are optimized at the
B3LYP/6-311+G* level of theory. Even though the isomers are almost degenerate,
the calculated spectra are quite different, indicating a strong
structure-property relationship. Therefore, these computed spectra can be used
in the photo-absorption experiments to distinguish between different isomers of
a cluster.Comment: Version2: Latex and hyperref enabled. Minor typos corrected. 4
figures, 2 pages. Accepted manuscript. To appear in AIP Conference
Proceeding
Remarkable Hydrogen Storage on Beryllium Oxide Clusters: First Principles Calculations
Since the current transportation sector is the largest consumer of oil, and
subsequently responsible for major air pollutants, it is inevitable to use
alternative renewable sources of energies for vehicular applications. The
hydrogen energy seems to be a promising candidate. To explore the possibility
of achieving a solid-state high-capacity storage of hydrogen for onboard
applications, we have performed first principles density functional theoretical
calculations of hydrogen storage properties of beryllium oxide clusters
(BeO) (n=2 -- 8). We observed that polar BeO bond is responsible for
H adsorption. The problem of cohesion of beryllium atoms does not arise,
as they are an integral part of BeO clusters. The (BeO) (n=2 -- 8)
adsorbs 8--12 H molecules with an adsorption energy in the desirable
range of reversible hydrogen storage. The gravimetric density of H
adsorbed on BeO clusters meets the ultimate 7.5 wt% limit, recommended for
onboard practical applications.
In conclusion, beryllium oxide clusters exhibit a remarkable solid-state
hydrogen storage.Comment: This document is the Accepted Manuscript version of a Published Work
that appeared in final form in JPCC, copyright American Chemical Society
after peer review and technical editing by the publisher. To access the final
edited and published work see , see
http://pubs.acs.org/doi/abs/10.1021/jp410994
A selective and colorimetric chemosensor for fluoride based on dimeric azulene boronate ester
India Hypertension Control Initiative—Hypertension treatment and blood pressure control in a cohort in 24 sentinel site clinics
Abstract The India Hypertension Control Initiative (IHCI) is a multi‐partner initiative, implementing and scaling up a public health hypertension control program across India. A cohort of 21,895 adult hypertension patients in 24 IHCI sentinel site facilities in four Indian states (Punjab, Madhya Pradesh, Maharashtra, and Telangana), registered from January 2018 until June 2019 were assessed at baseline and then followed up for blood pressure (BP) control and antihypertensive medication use. Among all registrations, 11 274 (51%) of the patients returned for a follow‐up visit between July 2019 and September 2019. Among patients returning for follow‐up, 26.3% had BP controlled at registration, and 59.8% had BP controlled at follow‐up (p < .001). The absolute improvement in BP control was more than two times greater in primary care (48.1 percentage point increase) than secondary care facilities (22.9 percentage point increase). Most IHCI patients received prescriptions according to state‐specific treatment protocols. This study demonstrates that a scalable public health hypertension control program can yield substantial BP control improvements, especially in primary care settings. However, high loss to follow‐up limits population health impact; future efforts should focus on improving systems to increase the likelihood that patients will return to the clinic for routine hypertension care