Arthroscopic Onlay Suprapectoral Bicipital Tenodesis Using Suture Anchor; A Prospective Cohort Study

Background: The long head of the biceps (LHB) tendon was assumed to be a common source of anterior shoulder pain. The inflammatory pathogenesis was considered to be the commonest. Different modalities of treatment were assigned, including conservative, physical therapy, and surgical. Biceps tenotomy and tenodesis were considered the commonest surgical techniques. Methods: We performed a prospective cohort study on 23 patients who presented with anterior shoulder pain due to pathology in the LHB from June 2019 to December 2021. participants were recruited for arthroscopic suprapectoral tenodesis and followed up at two endpoints; six and 12 months. To detect the clinical and functional outcomes, we used the Constant-Murley score, which included four domains pain, strength, range of motion, and Activities of daily living. Also, we calculated the incidence of the Popeye sign, which represented the rupture of LHB. Results: Patients could have a significant improvement in the Constant-Murley score postoperatively at both six and 12 months compared with the preoperative values, with a postoperative mean of 82.3 (78 - 88) at six months and 85.13 (80 - 91) at 12 months. Also, they achieved significant improvement in each of its components; pain, ADL, stability, and motility at six months compared with the baseline values. Additionally, only three patients developed the Popeye sign. Conclusion: The suprapectoral tenodesis was an effective procedure in the treatment of the pain of the LHB tendon with few side effects. It could significantly improve the Constant-Murley score at both six months and one year

Experimental and quantum chemical calculations on corrosion inhibition of mild steel by two furan derivatives

Two furan derivatives namely 5-methylfurfurylamine (MFA) and furfurylamine (FAM) were investigated as corrosion inhibitors for mild steel in 1 M HCl. The corrosion inhibition efficiencies (IE) were measured at 0.005M of the inhibitors using electrochemical potentiodynamic polarization measurements. The studied furan derivatives inhibit mild steel corrosion in acidic medium. The MFA shows higher inhibition efficiency of 84.77% compared to FAM of 41.75%. Quantum chemical calculations were performed at the B3LYP/6-311++G(d,p) level of density functional theory (DFT). Several quantum parameters were calculated to study the correlation between the molecular structures and the corrosion inhibition performance of the inhibitors. The MFA inhibitor shows higher HOMO energy, softness (S), fraction of electrons transferred (ΔN), and lower energy gap (ΔE) compared to the FAM. This result indicates a better corrosion inhibition performance of the MFA inhibitor. The results show that the calculated values of the quantum parameters using DFT calculations are consistent with the experimental findings

Evaluation of Treated Wastewater Quality Changes through the Vadose Zone

Due to water challenges in arid and semi-arid regions including water scarcity and increasing demands, wastewater reuse in irrigation is becoming more widely practiced. This paper presents a case study for Sadat City, Egypt, to assess the impacts of using treated wastewater (TWW) in irrigation on soil and evaluating the natural attenuation of the TWW in the vadose zone. A field and laboratory program was conducted to identify the hydraulic properties of the soil and the contaminant concentration in water and soil. Water flow and solute transport are simulated in the vadose zone using HYDRUS 1D for five soil profiles in the study area through 50 years from 1992 to 2042. Six contaminants of concern were selected to simulate (Mg, Cl, Fe, NH3, NO3 and Fecal Coliform to study the bio-clogging effect on the soil). Six irrigation scenarios were selected to simulate flow and transport according to thewastewater treatment (primary, secondary, oxidation pond, tertiary treated wastewater, tertiary for double field water duty and irrigation with two year rotation(primary treated wastewater and groundwater)). The results show the concentration of contaminants of concern which will reach to groundwater aquifer after the purification and soil leaching.The results indicate that the concentrations of contaminants of concern were affected sensitively by the initial concentration of soil columns. Keywords: Wastewater, groundwater, vadose zone, HYDRUS 1

ENV-625: IMPACTS OF TREATED WASTEWATER REUSE IN IRRIGATION ON GROUNDWATER: CASE STUDY OF SADAT CITY – EGYPT

Groundwater is becoming an essential water resource in Egypt due to the deficit in water balance. It is planned to increase withdrawal in 2017 to 7.5 BCM and 3.5 BCM from renewable and non-renewable groundwater aquifers, respectively. In recent years there have been efforts to protect this water resource. The main objective of this paper is studying the impacts of reusing treated wastewater in irrigation after natural attenuation through the vadose zone. Hydrogeological data were collected to characterize the aquifer in Sadat City. A field program was conducted to identify the saturated hydraulic conductivities of the aquifer and the contaminant concentrations in groundwater. Field investigations were conducted by drilling five boreholes in the study area and five monitoring wells were installed. Groundwater flow and solute transport were simulated by VISUAL MODFLOW and MT3D. Four contaminants of concern were selected for simulation: magnesium, chloride, iron and nitrates. Seven irrigation scenarios were tested: primary treated wastewater, secondary treated wastewater, oxidation pond wastewater, tertiary treated wastewater, tertiary for double field water duty, irrigation with two-year rotation (primary treated wastewater and groundwater) and in the last scenario the study area is divided into 3 zones and irrigated with tertiary treated wastewater, oxidation pond wastewater and groundwater. The simulation results of the seven scenarios were presented and compared to the initial concentrations in groundwater. The results show that the contaminants of concern concentrations depend on initial concentrations in groundwater and the quality of the infiltrated water from the vadose zone

Prospective Randomized Study Comparing the Intra-Operative and Postoperative Outcomes of Bipolar Enucleation of the Prostate Versus Thulium Laser Enucleation

Background: Benign prostatic hyperplasia (BPH) is an age-dependent patho-physiological condition. Bipolar enucleation of prostate (BipolEP) is now considered a rather effective method for the management of BPH patients. Aim and objectives: to assess the functional outcome of patients post plasma-kinetic enucleation in patients with large size prostate glands more than 80 cc as measured by Trans-rectal ultrasound. Patient and method: Our study involved 40 patients with symptomatic BPH who underwent endoscopic enucleation of the prostate using bipolar energy. Result: As regard the intraoperative complications our study showed that there were two patients (6.7%) complicated by small bladder perforation during morcellation and four patients (13.3%) had intra-operative bleeding necessitating blood transfusion and in the early postoperative period (the first 48 hours); one patient (3.33%) developed postoperative hematuria. After one month follow up we found that: 12 patients (30%) developed urge incontinence, 7 patients (17.5%) developed stress urinary incontinence and 5 patients (12.5%) developed mixed incontinence one with predominant urge and the other with predominant stress Conclusion: Bipolar enucleation (BipoLEP) is very effective for managing patients with symptomatic or complicated BPH with large gland size above 80 cc, having a high safety profile and low complications rate. Bipolar enucleation proved to be a very effective technique of endoscopic enucleation of the prostate and can stand out as a strong alternative to laser enucleation whenever laser facilities are not available with comparable results

Gold versus Palladium: A Regioselective Cycloisomerization of Aromatic Enynes

International audienceAromatic enynes can be transformed into arylnaphthalenes or benzofulvenes depending on the reaction conditions. Under gold(I) catalysis, exclusive or major 6-endo-dig cyclization took place leading to arylnaphthalenes. However, a catalytic system based on palladium iodide/1,3-Bis(diphenylphosphino)propane, in the presence of cesium carbonate as a base was necessary to furnish exclusively 5-exo-dig cyclization pattern, regardless to the electronic effects of the substituents. In the latter transformation, a mechanistic study (Kinetic Isotopic Effect, Density Functional Theory) involving a C-H activation is suggested for the exclusive benzofulvenes formation

Predictive model of 2-cyclohexylthiophene for corrosion inhibition in mild steel using computational method

Corrosion inhibition activity of 2-cyclohexylthiophene (2CHT) for mild steel in acidic media was predicted using QSAR tool. The model used two descriptors namely; Moran autocorrelation of lag4 weighted by mass (MATS4M) which explained the linearity and branching of the compounds and largest eigen values n3 of burden matrix weighted by mass (SPMAX3-Bh(m)) describes the nature and size of the neighboring atom. The modeling results revealed the potential of the compounds as a good corrosion inhibitor with percentage inhibition efficiency (%IE) of 76.5%. Quantum chemical calculation using DFT with 6-311G++(d,p) basis was used to evaluate the performance of the predicted compound as corrosion inhibitor by quantum chemical parameters such as EHUMO, ELUMO, Energy gap (Egap), hardness (?), softness (S), dipole moment (µ), electronegativity (X), electron affinity (A), ionization energy (I) and total energy (TE). The results obtained from quantum chemical parameters were found to be consistent with predicted result