Preparation, Characterization and In Vitro Biological Activities of New Diphenylsulphone Derived Schiff Base Ligands and Their Co(II) Complexes.

The present work describes the chemical preparation of Schiff bases derived from 4,4'-diaminodiphenyl sulfone (L1-L5) and their Co(II) metal complexes. The evaluation of antimicrobial and anticancer activities against MCF-7 cell line and human lung cancer cell line A-549 was performed. The aforementioned synthesized compounds are characterized by spectroscopic techniques and elemental analysis confirms successful synthesis. The results from the above analytical techniques revealed that the complexes are in an octahedral geometry. The antimicrobial activity of the synthesized Schiff base ligands and their metal complexes under study was carried out by using the agar well diffusion method. The ligand and complex interactions for biological targets were predicted using molecular docking and high binding affinities. Further, the anticancer properties of the synthesized compounds are performed against the MCF-7 cell line and human lung cancer cell line A-549 using adriamycin as the standard drug.

Comparative bioleaching of metals from pulverized and non-pulverized PCBs of cell phone charger: advantages of non-pulverized PCBs.

Sample inhomogeneity is a severe issue in printed circuit boards especially when we are comparing the bioleaching efficiency. To avoid the ambiguous results obtained due to inhomogeneity in PCBs, 12 similar cell phone chargers (of renowned company) having same make and batch number were collected from scrap market. PCBs obtained from them were used in present studies. Out of these 12, three PCBs were used separately for chemical analysis of PCBs with prior acid digestion in aqua regia. It was found that, 10.8, 68.0, and 710.9 mg/l of Zn, Pb, and Cu were present in it, respectively. Six PCBs were used for bioleaching experiment with two variations, pulverized and non-pulverized. Though the pulverized sample have shown better leaching than non-pulverized one, former has some disadvantages if overall recycling of e-waste (metallic and nonmetallic fraction) is to be addressed. At the end of leaching experiments, copper was recovered using a simple setup of electrodeposition and 92.85% recovery was attained. The acidophiles involved in bioleaching were identified by culture dependent and culture independent techniques such as DGGE and species specific primers in PCR.

Randomized, double-blind, placebo-controlled study to investigate the pharmacodynamic interaction of 5-HT3 antagonist ondansetron and paracetamol in postoperative patients operated in an ENT department under local anesthesia.

BACKGROUND: The preclinical incision pain models and clinical studies in healthy volunteers have demonstrated the central serotonergic analgesic mechanism, paracetamol analgesia. This has been evidenced by raised serotonin concentrations in the brain following paracetamol administration in a few studies. The inhibition of paracetamol analgesia by 5-HT3 antagonists suggests that this analgesia is 5-HT3 mediated. However, in a few studies, 5-HT3 antagonists themselves exhibited an analgesic action. Various studies in this context stated intricate results. The present study was intended to understand the pharmacodynamic interaction between paracetamol and ondansetron in postoperative patients. METHODS: This randomized clinical trial included 32 postoperative cases of either sex, ages between 18 and 70 years. The patients were randomly allocated into the placebo and test groups and received respective treatment at the end of surgery. The pain score was recorded using Visual Analogue Scale (VAS) and Face, Legs, Activity, Cry, Consolability (FLACC) behavioral scale at awakening and every 30 min for the next 3 h. The postoperative rescue analgesic consumption for 24 h was recorded. The data were analyzed using OpenEpi and SciStatCalc statistical software. RESULTS: A significantly higher pain score was observed in the placebo group postoperatively for 60 min on VAS (p<0.05 and p<0.01), whereas the FLACC behavior scale score was significantly higher at 120 and 150 min (p<0.05). The test group patients were more comfortable throughout the study, and the postoperative analgesic requirement was significantly lesser (p<0.05). CONCLUSIONS: The pharmacodynamic interaction between paracetamol and ondansetron coadministration does not block but instead increase paracetamol analgesia, reduce the postoperative analgesic requirement, and improve the postoperative comfort level.

Physiological taste threshold in type 1 diabetes mellitus.

The sense of taste is one of the important oral chemical senses that play a critical role in human life. The taste threshold increases by number of factors such as age, local and systemic disease like diabetes, consumption of alcohol, smoking. The aim of the present study was to assess the relationship between taste threshold in type 1 diabetics and non diabetics for four basic taste modalities (i.e. sweet, salt, sour and bitter). We studied 70 cases of type 1 diabetic and 70 non diabetics. The taste threshold was evaluated using 7 different serially half diluted concentrations of glucose (2.00 M-0.031 M), Nacl (1.00 M-0.0156 M), citric acid (0.05 M-0.0007 M) and quinine sulphate (0.001 M-0.000015 M). A significant increase in taste threshold for sweet (P<0.0001), salt, sour and bitter (P<0.001) in type 1 diabetic was observed. We concluded that taste sensation was reduced in type 1 diabetics.