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Search Results: 1 - 10 of 325631 matches for " Kara S Riehman "
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African-American crack abusers and drug treatment initiation: barriers and effects of a pretreatment intervention
Wendee M Wechsberg, William A Zule, Kara S Riehman, Winnie K Luseno, Wendy KK Lam
Substance Abuse Treatment, Prevention, and Policy , 2007, DOI: 10.1186/1747-597x-2-10
Abstract: Using street outreach, 443 African-American crack users were recruited in North Carolina and randomly assigned to either the pretreatment intervention or control group.At 3-month follow-up, both groups significantly reduced their crack use but the intervention group participants were more likely to have initiated treatment.The intervention helped motivate change but structural barriers to treatment remained keeping actual admissions low. Policy makers may be interested in these pretreatment sites as an alternative to treatment for short term outcomes.Sociocultural factors may pose significant barriers for drug abusers seeking health care or substance abuse treatment. These barriers may be particularly problematic for some African-Americans and other disadvantaged populations. To help reduce the negative behaviors and outcomes associated with substance abuse and dependence, new intervention models need to be developed that specifically address the sociocultural environment of ethnic minorities [1]. Moreover, recent research has recognized the need to enhance understanding of crack cocaine dependence and how crack abusers interact with the substance abuse treatment system [2].Crack is a cheaper and smokable form of cocaine that became widely available in the mid-1980s, and it continues to be a public health problem in the United States. Crack use is present among all ethnic groups [3], but it is most common among African-Americans residing in low-income inner-city neighborhoods [4-7]. Findings from the 2001 National Household Survey on Drug Abuse (NHSDA) indicated that African-Americans made up 12% of the U.S. population, but they represented 19% of individuals who had used crack in the past year [8]. In addition, crack dependence rates are reported to be higher among African-Americans than among Hispanics or Whites [4]. Furthermore, cocaine-related emergency room episodes and overdose deaths were more common among African-Americans than any other racial/ethnic group
Concurrent pulmonary Mycobacterium avium complex (MAC) infection and active Hürthle cell thyroid carcinoma: is there a connection?  [PDF]
Kara M. Meinke Baehr, Whitney S. Goldner
Health (Health) , 2010, DOI: 10.4236/health.2010.25058
Abstract: We present two cases of pulmonary MAC infection in women with Hürthle cell thyroid carcinoma. Both cases were asymptomatic octogenarian women with active Hürthle cell thyroid carcinoma and prolonged periods of hypothyroidism prior to diagnosis of pulmonary MAC. Mycobacterium avium complex has never been reported in association with any type of thyroid cancer, specifically Hürthle cell carcinoma. A review of the literature and possible associations between the two are discussed in this article.
Identification of Phenolic Substances and Their Seasonal Changesin Sultana and Perlette Grape Cultivars
E. Zeker,S. Kara
Pakistan Journal of Biological Sciences , 1999,
Abstract: Eleven phenolics compounds were detected in grape cultivars Sultana and Perlette on two dimensional TLC. No differences were found in the phenolic content of the cultivars. The phenolic substances in the shoot tips and leaves showed some differences. Spots belonging to the flavonoids and chlorogenic acids changed in size and intensity in some stages of the annual growth cycle of the vine.
Yeni leti im Teknolojileri, Siyasal Kat l m, Demokrasi(New Communication Technologies, Political Participation, Democracy)
Süleyman KARA?OR
Y?netim ve Ekonomi , 2009,
Abstract: Developments in communication technology have increased the possibility of world's culture and identity intersection in everyday. In the past it took weeks even months to spread any events occured in any place to the rest of the world so the effects level of these events were limited. However in or times this stitution has been changed reversely any explanation in anywhere have been realized in all of the world for a few hours. The pace of cultural scientific political and social interaction in the world has increased and became inevitable. Because people have the ability of follow the all news in the word due to new communication tools and communication networks.
Leaching Requirements to Prevent Soil Salinization
Tekin Kara,Lyman S. Willardson
Journal of Applied Sciences , 2006,
Abstract: The purpose of this study was to develop a model to quantify the rate of upward water movement from a shallow water table for different soils with and without plants as a function of water table depth and time, to predict Electrical Conductivity (EC) of the soil in a one-dimensional homogenous soil profile and to develop a water management procedure to control soil profile salinity in the presence of a shallow water table. The model simulates water and solute movement from a shallow water table for a bare soil surface. Salt distribution in the soil profile, caused by a saline shallow water table, was simulated by assuming a steady state upward water movement in the absence of a crop. As water moves upward through a soil profile from a shallow water table, the water evaporates at the surface, leaving the salt behind. Some of the salt moves down to a depth about 30 cm by molecular diffusion. This raises the salt concentration within the top 30 cm of the soil. The model also simulates crop water extraction patterns and consequently the salt distribution patterns in an irrigated soil profile for a specified root distribution. After a fallow season and the resulting salt concentration near the soil surface, the salt redistributes downward because of irrigation water application. Different leaching fractions were used in the simulations. A computer program, for the model SALTCTRL (Salt Control), was written in QBASIC language. The program was tested for two soils for different leaching fractions. The soil parameters needed for the computations were selected from the literature. Application of model results is discussed and recommendations for further research were made.
Phonons of Metallic Vicinal Surfaces
Abdelkader Kara,Talat S. Rahman
Physics , 2001, DOI: 10.1016/S0039-6028(01)01992-6
Abstract: We present an analysis of the vibrational dynamics of metal vicinal surfaces using the embedded atom method to describe the interaction potential and both a real space Green's function method and a slab method to calculate the phonons. We report two main general characteristics : a global shift of the surface vibrational density of states resulting from a softening of the force field. The latter is a direct result of the reduction of coordination for the different type of surface atoms; and an appearance of high frequency modes above the bulk band, resulting from a stiffening of the force field near the step atom. The latter is due to a rearrangement of the atomic positions during the relaxation of the surface atoms yielding a large shortening of the nearest neighbor distances near the step atoms.
Structure, Dynamics and Themodynamics of a metal chiral surface: Cu(532)
Abdelkader Kara,Talat S. Rahman
Physics , 2005, DOI: 10.1088/0953-8984/18/39/018
Abstract: The structure, vibrational dynamics and thermodynamics of a chiral surface, Cu(532), has been calculated using a local approach and the harmonic approximation, with interatomic potentials based on the embedded atom method. The relaxation of atomic positions to the optimum configuration results in a complex relaxation pattern with strong contractions in the bond length of atoms near the kink and the step site and an equivalently large expansion near the least under-coordinated surface atoms. The low coordination of the atoms on the surface affects substantially the vibrational dynamics and thermodynamics of this system. The local vibrational density of states show a deviation from the bulk behavior that persist down to the 10th layer resulting in a substantial contribution of the vibrational entropy to the excess free energy amounting to about 90 meV per unit cell at 300K.
Some New Paranormed Difference Sequence Spaces Derived by Fibonacci Numbers
E. E. Kara,S. Demiriz
Mathematics , 2013,
Abstract: In this study, we define new paranormed sequence spaces by the sequences of Fibonacci numbers. Furthermore, we compute the $\alpha-,\beta-$ and $\gamma-$ duals and obtain bases for these sequence spaces. Besides this, we characterize the matrix transformations from the new paranormed sequence spaces to the Maddox's spaces $c_{0}(q),c(q),\ell(q)$ and $\ell_{\infty}(q)$.
The optimization of voltage parameter for tissue electroporation in somatic embryos of Astragalus chrysochlorus (Leguminosae)
N Turgut-Kara, S Ari
African Journal of Biotechnology , 2010,
Abstract: Somatic embryo tissues of Astragalus chrysochlorus were transformed with the b-glucuronidase (GUS) and neomycin phosphotransferase II (npt II) genes by electroporation. The effect of electric field strength was tested for transient expression. It was found that 1000 V/cm and 200 ms and 1 pulse was the optimum combination to transform embryo tissues (expression level was 61.5%). Electroporated somatic embryo tissues were positive for GUS expression and PCR analysis for the genes GUS and npt II. After PCR analysis, we found that the efficiency of the somatic embryos with transient GUS expression by electroporation was 48%.
In vitro plant regeneration from embryogenic cell suspension culture of Astragalus chrysochlorus (Leguminoseae)
N Turgut-Kara, S Ari
African Journal of Biotechnology , 2008,
Abstract: In vitro plant regeneration was achieved from embryogenic cell suspension culture of Astragalus chrysochlorus. When 30-day-old aseptically grown seedlings were cultured on Murashige and Skoog (MS) medium containing 0.1 mg/l -naphthaleneacetic acid (NAA) plus 1.0 mg/l 6-benzyladenine (BA), friable callus was formed within two weeks from the mesocotyl of the seedling. After three weeks, proliferated actively growing calli were transferred to MS liquid medium containing 2,4- dichlorophenoxyacetic acid (2,4-D), indole-3-acetic acid (IAA) or NAA and subcultured at two week intervals. After two weeks, induction of somatic embryos up to the torpedo stage occured at all tested concentrations of 2,4-D, IAA or NAA. Somatic embryos developed only in MS medium containing 0.5 mg/l IAA within two weeks and 2% of globular embryos were developed into the cotyledonary stage embryos. Eighty one percent of somatic embryos cultured in MS medium supplemented with 0.5 mg/l IAA were found to be diploid by flow cytometric analysis. Plantlet propagation was achieved on half strength MS liquid medium supplemented with 3% (w/v) sucrose after four weeks of culture. After a month on half strength MS medium [1.5% (w/v) sucrose and 0.8% (w/v) agar] 29 of 71 shoots developed into rooted plantlets.
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