Streptococcus mutans possesses several extracellular sucrose-metabolizing enzymes which have been implicated as important virulence factors in dental caries. This study was initiated to investigate the genetic regulation of one of these enzymes, the extracellular fructosyltransferase (Ftf). Fusions were constructed with the region upstream of the S. mutans GS5 Ftf gene (ftf) and a promoterless ...

The alpha1-fetoprotein (AFP) gene is located between the albumin and alpha-albumin genes and is activated by transcription factor FTF (fetoprotein transcription factor), presumed to transduce early developmental signals to the albumin gene cluster. We have identified FTF as an orphan nuclear receptor of the Drosophila FTZ-F1 family. FTF recognizes the DNA sequence 5'-TCAAGGTCA-3', the canonical...

Orphan nuclear receptor fetoprotein transcription factor (FTF) was previously identified as a specific regulator of the alpha(1)-fetoprotein gene during early liver development and in response to hormonal signals (L. Galarneau, J.-F. Paré, D. Allard, D. Hamel, L. Lévesque, J. D. Tugwood, S. Green, and L. Bélanger, Mol. Cell. Biol. 16:3853-3865, 1996). Here we report a functional analysis of FTF...

The five to fifteen (FTF) is a parent questionnaire developed to assess ADHD, its common comorbid conditions and associated problems in children and adolescents. The present study examined (1) the psychometric properties of scores on the new teacher version of the FTF, (2) competing models of the FTF subdomain structure and (3) the psychometric properties and utility of scores on the newly deve...

In this study, face-to-face (FTF) and online students’ (N = 198) feelings of and desire for sense of community (SOC) in their courses were compared. In support of previous research, FTF students felt more SOC than online students. However, overall, relatively few students (FTF or online) expressed desire for SOC. Additionally, regression analyses revealed that different sets of student characte...

This study compares face-to-face (FTF) focus groups with focus groups conducted via computer-mediated communication (CMC), using a range of outcome, process and subjective measures. Sixteen groups of three undergraduates participated in focus group discussions under FTF and CMC conditions on two different topics. Topics, communication condition and order of discussion were counterbalanced over ...

BACKGROUND Few objective standards are available to assess the educational effectiveness of ophthalmology residency programs. As a possible measure, we evaluated the first-time failure (FTF) rate in the examinations of the American Board of Ophthalmology, defined as a first-attempt failure in the written examination or a first-attempt failure in the oral examination after having passed the writ...

The notion of FTF ring (see Definition 1.1 or Proposition 1.2) captures homological and finiteness properties shared by several classes of rings. Thus coherent rings with left flat-dominant dimension ≥ 1 [3, Corolario 2.2.11] or rings having quasi-Frobenius two-sided maximal quotient ring [7, Proposition 3.6; 3, Teorema 2.3.10] are examples of FTF rings. Moreover, FTF ring and QF-3 ring are rel...

The regulation of the rabbit apical sodium-dependent bile acid transporter (ASBT) was studied both in vivo and in vitro. New Zealand White rabbits were fed 0.5% deoxycholic acid (DCA) or SC-435, a competitive ASBT inhibitor, for 1 wk. In DCA-fed rabbits, ASBT expression was repressed, associated with activated FXR, and evidenced by increased ileal short heterodimer partner (SHP) mRNA. Feeding S...

The purpose of this study was to examine students’ academic self-concept and social presence in face-toface (FTF) and online version of the same course, and to examine the effects of these two variables on student learning achievement and satisfaction. A total of 257 undergraduate students enrolled in a digital design course were randomly assigned to either of two treatments: one offered FTF in...