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91.
The effect of localized plasmon on the photoemission and absorption in hybrid molybdenum disulfide-Gallium nitride (MoS2-GaN) heterostructure has been studied. Localized plasmon induced by platinum nanoparticles was resonantly coupled to the bandedge states of GaN to enhance the UV emission from the hybrid semiconductor system. The presence of the platinum nanoparticles also increases the effective absorption and the transient gain of the excitonic absorption in MoS2. Localized plasmons were also resonantly coupled to the defect states of GaN and the exciton states using gold nanoparticles. The transfer of hot carriers from Au plasmons to the conduction band of MoS2 and the trapping of excited carriers in MoS2 within GaN defects results in transient plasmon-induced transparency at ~1.28 ps. Selective optical excitation of the specific resonances in the presence of the localized plasmons can be used to tune the absorption or emission properties of this layered 2D-3D semiconductor material system. 相似文献
92.
Retained surgical sponge or glossypiboma is a relatively common occurrence; however, surgeons may not report these events for fear of litigation and adverse publicity. We report postoperative complications in three cases due to retained surgical sponges. The first case, a 26-year-old woman, presented with gastric outlet obstruction due to the sponge obstructing the pyloric canal three weeks following cholecystectomy, which was completely relieved following endoscopical removal of the sponge. The second case, a 32-year-old woman, presented with repeated attacks of intestinal obstruction following cholecystectomy and tubal ligation and was treated with surgical removal of the sponge. The third patient, a 40-year-old woman, presented with features of colonic obstruction following hysterectomy. Colonoscopy revealed a partial migration of the sponge through the colonic wall and on laparotomy, she was found to have multiple internal fistulae between the small and large intestines, all occurring around the inflammation caused by the retained sponge. 相似文献
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Rotavirus vaccines have been developed to prevent deaths resulting from severe diarrhea of rotavirus origin. The use of vaccines
as an intervention at scale to prevent and control the burden of rotavirus diarrhea is supported by the argument that prevailing
public health measures such as hygiene and sanitation, breast feeding and use of ORS have failed to prevent severe dehydration
resulting from diarrhea. The article reviews the existing evidence on the rationale of using rotavirus vaccine as against
the feasibility of scaling it up in developing countries like India. The vaccines currently available may not cover the strains
circulating in Indian population. The diversity of Rotavirus infection in the country is tremendous and since the safety,
immunogenicity and efficacy data has not been collected for India, there is first a need to conduct studies to measure the
extent of protection and cross-protection provided by the available vaccines for local strains, before venturing into Rotavirus
vaccination program. The potential benefits of immunization have to be first vetted against the risks involved by the policymakers
and other stakeholders. 相似文献
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Neogi U Sahoo PN Kumar R De Costa A Shet A 《AIDS research and human retroviruses》2011,27(11):1249-1253
Significant subtype-specific differences were observed in the protease (PR) region of the HIV-1 pol gene. Most of the previous studies were restricted to subtype B, although subtype C accounts for more than 50% of HIV infections worldwide. In this study we characterized PR sequences from primary clinical isolates from protease inhibitor (PI)-naive patients in South India (n=39) as well as database-derived HIV-1 subtype C sequences from India (n=542) and globally (n=2970). All the study sequences were identified as subtype C, which is predominant in India. Drug resistance genotyping analysis identified 2.6% (1/39) prevalence of major PI resistance (I54T) and 7.7% (3/39) of minor PI resistance (L10I, T74S, and A71T). Selection of T12S, I15V, L19I, M36I, R41K, H69K, L89M, and I93L was observed both in global and Indian subtype C while the L63P mutation was selected in Indian PR sequences. Three different codon-based maximum likelihood methods agreed on four sites (12, 19, 36, and 82) under positive selection in Indian sequences. 相似文献
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