<p class="abstract"><strong>Background:</strong> Intertrochanteric fractures are common osteoporotic fractures in adults above 60 years with high mortality and morbidity. Common techniques for fixation of these fractures are sliding hip screw and plate or intramedullary nailing. Intramedullary nailing has advantage of short incision, less operative time, rapid rehabilition & thus decreased medical complications. PFNA II is newer intramedullary implant developed to obtain better fixation strength in osteoporotic bones. Biomechanical studies has demonstrated that PFNA II blade has a significance of higher cut out resistance than other commonly used screw systems.</p><p class="abstract"><strong>Methods:</strong> Prospective follow up study carried out at J.L.N. Medical College Ajmer from 1 March 2017 to 31st October 2018. 30 patients with unstable intertrochanteric fractures were included and operated on fracture table in supine position with PFNA2. We measured operative time, duration of hospital stay, modified Harris hip score and complications.<strong></strong></p><p class="abstract"><strong>Results:</strong> The mean age of the patients was 70.83 years of age. The mean time in surgery was 38.2 minutes. The mean amount of blood loss in surgery was 110.8 ml. In implant related complications, 2 patients had cut out and 1 patient had pull - out of the implant. Functional results according to modified Harris hip scores was found to be excellent in 8 (30%) patients, good in 12 (40%) patients, fair in 7 (20%) patients and poor in 3 (10%) patients.</p><p><strong>Conclusions:</strong> Elderly patients treated with PFNA2 has good outcome as less operative time, minimal blood loss, early weight bearing, less union time and very few cases of medial penetration and back out of spiral blade. </p>
No abstract
Enzymes provide a uniquely crafted chiral environment for a reaction to proceed in high selectivity and catalytic activity. However, enzymes are very substrate‐specific and thus provide little use in synthetic settings where broad substrate applicability is desirable. (i) Modifying an enzyme, either through modification of some residues or by installing a nonnative transition metal complex, can broaden the substrate scope and allow nonnatural transformations while increasing the activity and selectivity of small‐molecule catalysis. Coupled with the recent advances in genetic engineering and directed evolution method, (ii) modifying enzymes as per the requirement is getting more accessible. These modifications are resulting in increased attention to the enzymatic catalysis field, some even replacing established organometal‐catalyzed industrial processes. (iii) However, even with improvement in such techniques, creating an abiotic reaction from a noncatalytic scaffold remains a significant limitation.
Adsorption technique is widely used for removal of toxic organic contaminants from aqueous streams. Owing to the hazardous or otherwise undesirable characteristics of phenolic compounds in particular, their presence in wastewater from municipal and industrial discharge is one of the most important environmental issue. The discharge of poor quality effluents by the chemical-based laboratories and refineries in India is posing a serious threat to water sources and wastewater treatment installations alike. Our study was set up in the Indo - French Unit for Water & Wastewater Technologies (IFUWWT), IIT Delhi. The main objective of this study was to assess the efficiency of a laboratory-scale activated sludge treatment process in producing a final effluent conforming to regulatory standards of Central Pollution Control Board, India (CPCB norms) with regards to COD and metal ion loads. The study was conducted in three principal stages: characterization of wastewater containing nanoparticles; treatability studies of laboratory generated discards and investigations of heavy metal ions before and after treatment. The various raw effluent parameters analyzed were COD, BOD, F/M ratio, Sludge Value Index, Total Solids and concentrations of Cu, Ag and Zn. Studies were conducted using two aerobic sequencing batch reactors (SBR). MLSS of the aeration basin was calculated to be 7180±261.3 mg/L while the F/M ratio was kept down to 0.1560±.0149; besides, an SVI of 107.24 mL/g complied with the state of bioreactor’s sludge. These set of values suggested to set an extended aeration processes for the reactors. Accordingly, the detention time in aeration basin was 24 hours. The results showed over 98% influent COD reduction and nearly 100% removal of metal ions. The sample used was operated on sludge collected from Vasant Kunj Wastewater Treatment plant. Based on the results from waste characterization and treatability studies, it was decided that the mixed liquor discharged in the activation tank should have glucose solution and laboratory discarded sample in 1:1 ratio. The reactor was operated on a glucose fed batch basis for 30 days. For the sake of metal analysis, the digested water samples were analyzed for the presence of copper, silver and zinc using the ElementAS AAS4141 Atomic Absorption Spectrophotometer (by Electronics Corporation of India Ltd). The biosorption capacities were found to be over 95% in all the cases with the minimum correlation coefficient for calibration curve being 0.9811. Such a high sludge yield is suggestive of the fact that heavy metals are in very low concentrations in the considered carboy sample. Because of these insignificant values, the amount of metal ions introduced to the system gets adsorbed almost completely, hence leaving behind no metal ion within the supernatant. Well-treated wastewater has enormous potential as a source of water for crops, households and industry.
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