Prevalence and correlates of substance use among persons with mental disorders in a Nigerian Psychiatric Hospital

Few studies in Nigeria have investigated the relationship between psychiatric disorders and substance use. Yet, evidence worldwide suggests that substance related problems might be a major burden among persons with psychiatric disorders. One hundred and five persons with mental illness (105) were evaluated for substance use with the Alcohol, Smoking, and Substance Involvement screening test (ASSIST). A questionnaire was used to elicit Sociodemographic variables. A high proportion had initiated tobacco (50.9%) and cannabis (34.5%) during adolescent. Factors associated with hazardous drug consumption were male sex (p<0.05), younger age (p<0.05)  unemployment (p<0.01) being unmarried (p<0.05) and lower educational level (p<0.05). Routine screening and brief interventions for substance use in psychiatric facilities should be critical components of mental health service delivery

NOVEL SMART pH SENSITIVE CHITOSAN GRAFTED ALGINATE HYDROGEL MICROCAPSULES FOR ORAL PROTEIN DELIVERY: II. EVALUATION OF THE SWELLING BEHAVIOR

Objective: The main objective of this study is to evaluate the swelling behavior of pH sensitive chitosan (CS) grafted alginate (ALG) hydrogel microcapsules and compared with a simple alginate-chitosan mixed polyelectrolyte complex (PEC) to show the benefits of the used covalently grafting technique. In addition, the behavior of the swelling process under physiological conditions to stimulate gastric, colonic and intestinal medium for grafted PEC microcapsules will be investigated as well.Methods: The new pH sensitive hydrogel microcapsules were prepared using grafting to†technique. Swelling studies were conducted in buffer saline solutions with different pHs using wet beads. In addition; the sensitivity of the grafted microcapsules to the change of pH in the simulated gastric fluid (SGF; pH 1.2), (SIF; pH 6.8) and (SCF; pH 7.4) was investigated.Results: It was observed from the swelling studies that sharp phase transition was recognized between pH 3–4. While this transition became broader and recognized between pH 3.0-7.4, where the maximum value of the equilibrium swelling degree was varied depending on the variation of CS concentration from 0.1% to 0.5%, both grafted and mixed microcapsules exhibit higher swelling degree at high pH 6.8 (120%, 100%) respectively.Conclusion: It was clear from all swelling studies that the grafting technique may be a suitable way for large-scale production of pH sensitive alginate–chitosan microcapsules as a potential system for site-specific oral delivery of protein drugs to different regions of the intestinal tract.Â

NOVEL SMART pH SENSITIVE CHITOSAN GRAFTED ALGINATE HYDROGEL MICROCAPSULES FOR ORAL PROTEIN DELIVERY: I. PREPARATION AND CHARACTERIZATION

Objectives: Preparation and characterization of a new pH sensitive chitosan (CS) grafted alginate (ALG) hydrogel microcapsules for the oral delivery of protein.Methods: The pH sensitive hydrogel microcapsules were prepared for the first time using grafting to†technique. Firstly, alginate was activated using Ï-Benzoquinone (PBQ) as a coupling agent to graft Chitosan chains later on. Both of activated and grafted alginate microcapsules were characterized by Fourier transform-Infra red spectroscopy (FT-IR), thermal gravimetric analysis (TGA) and the morphological structures were investigated using Scanning electron microscopy (SEM) examination.Results: It was found that the optimum conditions affecting the activation process and also the swelling degree of the prepared hydrogel microcapsules were 2% ALG, 0.04M PBQ pH10, 45 °C for 2h. In addition, the grafting process depends on the attached amount of PBQ and CS concentration. Maximum grafting efficiency (GE %) and chitosan add-on percentage were 98.6% and 14.8% respectively using 0.3% CS at 40 °C for 3h.Conclusions: Novel pH sensitive hydrogel microcapsules were prepared via grafting of chitosan molecules on to activated alginate backbone. The formulated microcapsules can be applied as a new pH sensitive carrier for protein drugs. Â

Trends of gastric malignancies: Case study of Ibn Sina Hospital 2010-2011

Back ground: Gastric malignancies carry poor prognosis, because they commonly present at an advanced stage.Objective: to find out mode of presentation and its impact on the outcome and management of gastric cancer and to find if there are changes in trends of gastric malignancies over the last decade.Patients and methods: A review of 53 patients with gastric malignancies, treated at Ibn Sina Hospital from August 2010 through August 2011. Their demographic data, pattern of clinical presentation, histopathology grading and staging, type of management and hospital mortality were studied.Statistical analysis: Data was fed to Statistical Package for Social Sciences. Means and correlations were computed where appropriate. One sample t-test was performed. Statistical significance was taken at P = 0.05.Results: Out of 53 patients males comprise 30(56.6%) males. The peak frequency was at the age group 55-70 years. Patients from the Northern Region of Sudan constituted 34%. Adenocarcinoma comprised 43(81.3%), GIST 8(15%), lymphoma 1(1.9%) and carcinoid 1(1.9%). Epigastric painwas the commonest symptom in 47(88.7%) patients. Smoking and snuff (Tombak) and high salt diet were found in 7.5% and 5.7% and 3.8% patients respectively. Blood group A and O was found in 22.6% and 60.4% respectively. Family cancer syndrome was found in 11.3% patients.Malignancies of the antrum constitute 27(65.85%), cardia 4(9.8%), body 7(17.1%), and whole stomach 3(7.3%) patients. There were only 6.25% clinically early cases. Potentially curative resection was attempted in 31.7%. The mean hospital stay was 12 days.Conclusion: Patients presented at stage III and IV comprise 30 (93.75%) out of 32 carcinoma patients. The hospital morbidity was 13(24.6%) patients and mortality 4(7.5%) patients. When compared with results from same hospital there is improvement in outcome over a decade.Keywords: Adenocarcinoma, lymphoma, carcinoid, dysphagia

End-to-End Joint Antenna Selection Strategy and Distributed Compress and Forward Strategy for Relay Channels

Multi-hop relay channels use multiple relay stages, each with multiple relay nodes, to facilitate communication between a source and destination. Previously, distributed space-time codes were proposed to maximize the achievable diversity-multiplexing tradeoff, however, they fail to achieve all the points of the optimal diversity-multiplexing tradeoff. In the presence of a low-rate feedback link from the destination to each relay stage and the source, this paper proposes an end-to-end antenna selection (EEAS) strategy as an alternative to distributed space-time codes. The EEAS strategy uses a subset of antennas of each relay stage for transmission of the source signal to the destination with amplify and forwarding at each relay stage. The subsets are chosen such that they maximize the end-to-end mutual information at the destination. The EEAS strategy achieves the corner points of the optimal diversity-multiplexing tradeoff (corresponding to maximum diversity gain and maximum multiplexing gain) and achieves better diversity gain at intermediate values of multiplexing gain, versus the best known distributed space-time coding strategies. A distributed compress and forward (CF) strategy is also proposed to achieve all points of the optimal diversity-multiplexing tradeoff for a two-hop relay channel with multiple relay nodes.Comment: Accepted for publication in the special issue on cooperative communication in the Eurasip Journal on Wireless Communication and Networkin

Prevalence and risk factors of cervical cancer among women in an urban community of Kwara State, North Central Nigeria

Background. Cervical cancer is the second most common malig- nancy in women worldwide with a high incidence in under-devel- oped countries and Nigeria is one of these countries. This study aimed at screening for cervical cancer using Papanicolaou smear and to identify risk factors for cervical cancer among women in Olufadi community, Kwara state, North-central Nigeria. Methods. This was a cross-sectional study involving the screening of women aged 25-64 years for cervical cancer using Papanicolaou smear. Respondents were selected through systematic random sam- pling of households. Interviewer- administered questionnaire and clinical report form were also used to collect data. In addition, Pap smear samples were taken. Data was analyzed using SPSS version 15. Results. Only 10 (5.0%) respondents had positive cytology result, while the rest were normal. Of the 10 positive cytology results, 1(10.0%) was high grade squamous intraepithelial lesion (HGSIL) while the remaining 9(90.0%) were low grade squamous intraepithelial lesion (LGSIL) which corresponds to 0.5% and 4.5% of the total respondents respectively. Risk fac- tors for cervical cancer identified included coitarche, tobacco smoking, number of sexual partners and family history of cervi- cal cancer. Conclusion. The findings from this study attest to the increasing burden of cervical cancer. The high number of positive results obtained from the study coupled with the presence of risk factors was an indication of how useful regular screening will be in the early detection of cervical cancer

Testing the efficacy of voluntary urban greenhouse gas emissions inventories

Drawing from an original dataset of urban metropolitan carbon footprints, we explore the correlations between national level climate change commitments and subnational level inventories. We ask: Does voluntary reporting allow a city to perform better than national average? Does ambitiousness in commitment have an impact on performance in footprint reduction? Does having long-term commitments affect performance in footprint reduction? Do binding national level commitments (such as those under the Kyoto Protocol) affect performance at the city level in terms of footprint reduction? To provide answers, we synthesize data from the largest repository of voluntary sub-national commitments and actions towards footprint reduction and greenhouse gas inventories from around the world, the Carbonn platform. More than 500 cities report at least one action, commitment or inventory to this database. We find, using a subset of this database, perhaps counter intuitively that cities with more ambitious commitments do not necessarily have steeper reductions in emissions. Our data also suggest that having long-term self-reported goals does not make the cities perform better in terms of footprint reduction. This appears to be true for both government and community commitments reported. Lastly, and positively, our data did reveal a statistically significant effect for cities belonging to countries that had committed to the Kyoto Protocol, suggesting the necessity of binding national (and supranational) climate targets

Neutron Electric Dipole Moment Constraint on Scale of Minimal Left-Right Symmetric Model

Using an effective theory approach, we calculate the neutron electric dipole moment (nEDM) in the minimal left-right symmetric model with both explicit and spontaneous CP violations. We integrate out heavy particles to obtain flavor-neutral CP-violating effective Lagrangian. We run the Wilson coefficients from the electroweak scale to the hadronic scale using one-loop renormalization group equations. Using the state-of-the-art hadronic matrix elements, we obtain the nEDM as a function of right-handed W-boson mass and CP-violating parameters. We use the current limit on nEDM combined with the kaon-decay parameter $\epsilon$ to provide the most stringent constraint yet on the left-right symmetric scale $M_{W_R} > (10 \pm 3)$ TeV.Comment: 20 pages and 8 figure