Correction: T cell activation and differentiation is modulated by a CD6 domain 1 antibody Itolizumab.

[This corrects the article DOI: 10.1371/journal.pone.0180088.].

Synthesis and photoluminescence properties of red emitting phosphor La2-x Eux Li0.5 Al0.5 O4 [x = 0.2-2] with K2 NiF4 structure.

Europium (Eu)3+ -substituted La2 Li0.5 Al0.5 O4 red emitting phosphors were prepared by a conventional high-temperature solid-state reaction method. Powder X-ray diffraction, diffuse reflectance spectra and spectrofluorometry were used as vital characterizing tools for the phosphors. The Eu concentration dependence luminescence properties and Judd-Ofelt intensity parameters were investigated and calculated, respectively. All compositions showed an orange red emission (due to the magnetic and electric dipole transitions of the Eu3+ ion) with the appropriate Commission Internationale de l'Eclairage (CIE) colour gamut under near ultraviolet or blue ray light excitation. The calculated critical distance showed that the energy transfer occured between Eu to Eu via an exchange mechanism. The Eu1.4 La0.6 Li0.5 Al0.5 O4 composition showed the highest red emission intensity with CIE colour saturation compared with that of the commercial Eu-activated yttrium oxysulfide red phosphor.

Dried blood spots are an acceptable and useful HIV surveillance tool in a remote developing world setting.

Enzyme-linked immunosorbent assay and Western blot analysis of dried blood spots (DBS) on filter paper have been shown to be as sensitive and specific as analysis of serum, and therefore may be a cost-effective and culturally appropriate HIV seroprevalence tool in remote areas. This study examines the acceptability of DBS in a tropical, rural population from an outpatient clinic in Andhra Pradesh, India, where participation was offered to every fifth patient seeking general medical care between March and April 2001. All 1413 patients approached for the study agreed to participate and provide a DBS for examination. The overall HIV seroprevalence in this sample was 2.8%. Of the participants, 51.7% were male, 93.2% were between the ages of 18 and 40, 85.3% were married, 29.7% were employed, 47.6% had no education and 73.1% resided in a rural setting. In the univariate analysis, history of genital warts (P = 0.01), sexually transmitted disease (P = 0.001), premarital sexual intercourse (P = 0.002), sexual contact with a commercial sex worker (P = 0.003), being employed (P = 0.011) and having more than 10 injections for medical purposes (P = 0.006) all correlated with being HIV-infected. Given the uniform willingness of these clinic attendees to be tested, we conclude that DBS is a useful, cost-effective tool in HIV serosurveillance in a rural, tropical setting.