PREPARATION AND CHARACTERIZATION OF ENTERIC COATED MUCOADHESIVE TABLET OF CAPTOPRIL

Delayed sustained release formulation is to retard release of the drug form the stomach and release in the intestinal pH. Captopril is recommended as first choice of drug. Attacks of the myocardial infarction are generally in the early morning or night. Captopril is showing less bioavailability in presence of food. With enteric coating problem should be solved out. It also minimizes the gastric irritation of the captopril. Captopril is widely used for the arterial hypertension. It also used for myocardial infarction and in diabetic nephropathy. The drug dose is taken three times daily, which may give poor patients compliance. In the present investigation, an attempt was made to decrease dosing frequency by prepare a mucoadhesive tablets using various polymers such as HPMC K4M, bael gum and chitosan. Eudragit RL100 used as enteric coating polymer. Formulations friability, drug content, surface pH, wash off test, mucoadhesive strength and dissolution study. The results of friability tests carried out for all the formulations are within the official limit and acceptable. According to wash off test the formulation containing bael gum showing better results. All the formulation was showing better swelling property. F4 (formulation containing bael gum) was showing best mucoadhesive strength among all the formulations.  In in-vitro drug release study formulation (F4) containing bael gum showing better control release among all the formulations i.e. 86.488 % in 12 hrs

Cardiovascular Risk Profiles amongst Women in a Multiethnic Population in Inner City Britain: A Potential Impact of Anaemia

The risk of diabetes is markedly reduced in men with iron deficiency anaemia (IDA). The nature of this relationship in women is not clear, nor is there information about the influence of ethnicity, given the increased susceptibility of diabetes amongst South Asians and Afro-Caribbeans. We reviewed 3563 patients with a diagnosis of anaemia from 2000 to 2007. The age-adjusted prevalence of vitamin B12 deficiency and IDA was calculated, together with cardiovascular comorbidities amongst Caucasians, South Asians, and Afro-Caribbeans. The prevalence of vitamin B12 deficiency (women only) or IDA was markedly higher in South Asians compared to Caucasians and Afro-Caribbeans. Among women with IDA, diabetes was more prevalent among South Asians (45%, 95% CI 39.0–51.0) compared to Caucasians (3.0%, 2.1–4.0);P&lt;0.001. Among South Asian women with vitamin B12 deficiency, the prevalence of diabetes was reduced 8.5% (5.2–12.0). South Asian women with vitamin B12 deficiency had a higher prevalence of myocardial infarction (MI) and ischemic heart disease (IHD), but this relationship was reversed in IDA. IDA is associated with a greater prevalence of diabetes in South Asian women, but it is not coordinated by a greater risk of macrovascular complications. Given the cardiovascular impact of diabetes in South Asians, this association merits further study in relation to its pathophysiological implication.</jats:p

Analytical Investigation on Papr Reduction in OFDM Systems Using Golay Codes

Abstract Orthogonal frequency division multiplexing (OFDM) is a common technique in multi carrier communications. One of the major issues in developing OFDM is the high peak to average power ratio (PAPR). Golay sequences have been introduced to construct 16-QAM and 256-QAM (quadrature amplitude modulation) code for the orthogonal frequency division multiplexing (OFDM), reducing the peak-to-average power ratio. In this paper we have considered the use of coding to reduce the peakto- average power ratio (PAPR) for orthogonal frequency division multiplexing (OFDM) systems. By using QPSK Golay sequences, 16 and 256 QAM sequences with low PAPR are generated</jats:p