Synthesis and characterization of a new reusable calix[4]arene-bonded silica gel sorbent for antidiabetic drugs.

A novel calix[4]arene-bonded silica gel (C4BS) is prepared by covalent attachment of a calix[4]arene derivative to silica gel through a thiol-ene process. The structure and properties of C4BS were studied by Fourier Transform Infra-Red (FTIR) spectroscopy, thermal gravimetric analysis (TGA), elemental analysis (CHN), scanning electron microscopy (SEM), and surface area analysis (BET). In addition, the binding affinity of some antidiabetic drugs towards C4BS was investigated, by quantitative measurement of the drugs in aqueous solution using UV-visible spectroscopy.

Synthesis of a new chitosan--butylcalix[4]arene polymer as adsorbent for toxic mercury ion.

In this paper, we have synthesized a novel chitosan--butylcalix[4]arene polymer (CCP) as a highly efficient adsorbent for mercury ion (Hg) removal from water. In fact, a lower rim diamine derivative of -butylcalix[4]arene has been cross-linked with chitosan chain by carbonyl diimidazole (CDI) as the linker. CDI forms a urea linkage between calix[4]arene diamine derivative and amine groups of the chitosan polymeric chain.

Recent progress to construct calixarene-based polymers using covalent bonds: synthesis and applications.

The combination of supramolecular chemistry and polymer sciences creates a great possibility to afford calixarene-based polymers offering unique features and applications. The enhancement of calixarene's versatility in this manner has made chemists better able to achieve different objectives in host-guest chemistry. The calixarene-based polymers can be divided into covalent polymers and supramolecular polymers regarding the interactions.

Highly functionalized calix[4]arenes multicomponent reactions: synthesis and recognition properties.

Multicomponent reactions (MCRs) include several aspects of green chemistry principles, so it is obvious that chemists in different areas are increasingly interested in providing their product by multicomponent approaches. MCRs can be very useful in supramolecular chemistry, especially to produce novel supramolecular derivatives. Therefore, there are several reports of highly-functionalized calix[4]arene derivatives obtained by MCRs instead of conventional stepwise protocols during the last decade.

Simultaneous voltammetric sensing of acetaminophen, epinephrine and melatonin using a carbon paste electrode modified with zinc ferrite nanoparticles.

A highly selective electrochemical sensor was fabricated based on a modified carbon paste electrode with zinc ferrite nanoparticles (ZnFeO NPs). The nanocomposite has attractive properties such as high surface-to-volume ratio and good electrocatalytic activity towards the drugs acetaminophen (AC), epinephrine (EP), and melatonin (MT), best at working voltages of 0.35, 0.

Effect of hydroalcoholic extract of Hypericum perforatum L. leaves on ethylene glycol-induced kidney calculi in rats.

Purpose: To investigate the effects of the hydroalcoholic extract of Hypericum perforatum (H. perforatum) leaves on the kidney calculi in rats.

Materials And Methods: Fifty-two Wistar male rats were randomly divided into 4 groups: Groups 2, 3, and 4 received ethylene glycol (EG) 1% + ammonium chloride (0.

Comparison of early maladaptive schemas and parenting origins in patients with opioid abuse and non-abusers.

Objective: The aim of this study was to examine the difference of early maladaptive schemas and parenting origins in opioid abusers and non-opioid abusers.

Method: The early maladaptive schemas and parenting origins were compared in 56 opioid abusers and 56 non-opioids abusers. Schemas were assessed by the Young Schema Questionnaire 3rd (short form); and parenting origins were assessed by the Young Parenting Inventory.

Menstrual irregularities and related plasma hormone levels in multiple sclerosis patients treated with beta interferone.

Multiple sclerosis is a chronic inflammatory disease of central nervous system.Women are more susceptible to this disease. One of the obvious clinical complaints in women with multiple sclerosis specially treated with Beta Interferones is menstrual cycle irregularity.

Dendritic spine changes in medial prefrontal cortex of male diabetic rats using Golgi-impregnation method.

Background: Neuropathy is one of the major complications contributing to morbidity in patients with diabetes mellitus. The effect of diabetes on brain has not been studied so much and no gross abnormality has been found in the central nervous system of patients with diabetic neuropathy. This study was conducted to evaluate the time-dependent structural changes in medial prefrontal cortex of male diabetic rats using Golgi-impregnation method.