Assessment of Arthrobacter viscosus as reactive medium for forming permeable reactive biobarrier applied to PAHs remediation

Polycyclic aromatic hydrocarbons (PAHs) are significant environmental contaminants as they are present naturally as well as anthropogenically in soil, air and water. In spite of their low solubility, PAHs are spread to the environment, and they are present in surface water, industrial effluent or groundwater. Amongst all remediation technologies for treating groundwater contaminated with PAHs, the use of a permeable reactive biobarrier (PRBB) appears to be the most cost-effective, energy efficient, and environmentally sound approach. In this technology, the microorganisms are used as reactive medium to degrade or stabilize the contaminants. The main limits of this approach are that the microorganisms or consortium used for forming the PRBB should show adequate characteristics. They must be retained in the barrier-forming biofilm, and they should also have degradative ability for the target pollutants. The aim of the present work is to evaluate the viability of Arthrobacter viscosus as bioreactive medium for forming PRBB. Initially, the ability of A. viscosus to remove PAHs, benzo[a]anthracene 100 μM and phenanthrene 100 μM was evaluated operating in a batch bench-scale bioreactor. In both cases, total benzo[a]anthracene and phenanthrene removals were obtained after 7 and 3 days, respectively. Furthermore, the viability of the microorganisms was evaluated in the presence of chromium in a continuous mode. As a final point, the adhesion of A. viscosus to sepiolite forming a bioreactive material to build PRBB was demonstrated. In view of the attained results, it can be concluded that A. viscosus could be a suitable microorganism to form a bioreactive medium for PAHs remediation.This work has been supported by the Spanish Ministry of Economy and Competitiveness and FEDER Funds (Project CTM 2011-25389). Marta Pazos received financial support under the Ramon y Cajal programme and Marta Cobas under the final project master grant "Campus do Mar Knowledge in depth"

Приклади завдань для позакласної роботи з інформатики у початковій школі

У статті коротко описана методика проведення позакласної роботи з інформатики у початковій школі

Intraperitoneal drain placement and outcomes after elective colorectal surgery: international matched, prospective, cohort study

Despite current guidelines, intraperitoneal drain placement after elective colorectal surgery remains widespread. Drains were not associated with earlier detection of intraperitoneal collections, but were associated with prolonged hospital stay and increased risk of surgical-site infections.Background Many surgeons routinely place intraperitoneal drains after elective colorectal surgery. However, enhanced recovery after surgery guidelines recommend against their routine use owing to a lack of clear clinical benefit. This study aimed to describe international variation in intraperitoneal drain placement and the safety of this practice. Methods COMPASS (COMPlicAted intra-abdominal collectionS after colorectal Surgery) was a prospective, international, cohort study which enrolled consecutive adults undergoing elective colorectal surgery (February to March 2020). The primary outcome was the rate of intraperitoneal drain placement. Secondary outcomes included: rate and time to diagnosis of postoperative intraperitoneal collections; rate of surgical site infections (SSIs); time to discharge; and 30-day major postoperative complications (Clavien-Dindo grade at least III). After propensity score matching, multivariable logistic regression and Cox proportional hazards regression were used to estimate the independent association of the secondary outcomes with drain placement. Results Overall, 1805 patients from 22 countries were included (798 women, 44.2 per cent; median age 67.0 years). The drain insertion rate was 51.9 per cent (937 patients). After matching, drains were not associated with reduced rates (odds ratio (OR) 1.33, 95 per cent c.i. 0.79 to 2.23; P = 0.287) or earlier detection (hazard ratio (HR) 0.87, 0.33 to 2.31; P = 0.780) of collections. Although not associated with worse major postoperative complications (OR 1.09, 0.68 to 1.75; P = 0.709), drains were associated with delayed hospital discharge (HR 0.58, 0.52 to 0.66; P < 0.001) and an increased risk of SSIs (OR 2.47, 1.50 to 4.05; P < 0.001). Conclusion Intraperitoneal drain placement after elective colorectal surgery is not associated with earlier detection of postoperative collections, but prolongs hospital stay and increases SSI risk

Sudaki İlk Yabancı Ayrılıyor

Thames Water, Körfez'den ayrılırken arkasında tartışmalar bırakıyor

Experimental Study of Moment Method for Undergraduates in Electromagnetic

N. F. O. Serteller, A. G. Ak, G. Kocyigit, T. C. Akinci. Experimental Study of Moment Method for Undergraduates in Electromagnetic // Electronics and Electrical Engineering. - Kaunas: Technologija, 2011. - No. 3(109). - P. 115-118. The experimental study and Moment Method with is programmed in Mathematica are presented here to facilitate introductory instruction on numerical methods for undergraduate electrical education students. The Method of Moments (MOM) is introduced at the beginning level to prepare students for subsequent advanced topics in complex matrix method and linear vector space theory. The study is carried out with parallel plate capacitor. The different capacitor (dielectric) materials are tried and coincidental program of MOM are studied. III. 4, bibl. 9, tabl. 1 (in English; abstracts in English and Lithuanian).WOS:0002890455000262-s2.0-7996116458

Determination of Nurses’ Attitudes and Beliefs on Sexual Care Towards Urology Patients

Objective: The aim of this descriptive research is to determine the attitudes and beliefs of urology nurses regarding sexual care. Material and Methods: The data of this study were collected via internet between May and August 2020. The sample of the study consisted of 118 nurses who voluntarily agreed to participate in the study, able to use internet and working in clinics which urology patients are cared for. The data of the study were collected using data collection form that consists questions regarding the sociodemographic characteristics of the nurses and Sexual Attitudes and Belief Scale. Number and percentage distribution, Kruskal-Wallis, MannWhitney U test, Spearman Correlation Analysis were used in the analysis of the data. Results: It was determined that the average age of the nurses was 32.61±6.73 (min:22, max:46) years. In this study, the mean score of the Sexual Attitudes and Beliefs Scale was determined as 40.86±8.57 (min:15 max:65). It was found that 79.7% (n:94) of the nurses did not spare time to discuss the sexual problems of their patients. It was found that the marital status of the nurses (U:190,00 p:0.010) and being educated about sexual care (U:1052.00 p:0.007) affected their sexual attitudes and beliefs. It was determined that the mean score of the nurses to feel themselves competent in providing counseling regarding sexual care to their patients was 4.25±2.39 (min:0, max:10) out of ten. It was determined that the mean score of the nurses for feeling comfortable while giving counseling to their patients regarding sexual care was 4.32±2.63 out of ten (min:0 to max:10). Conclusion: In conclusion, it has been determined that urology nurses have a moderate obstacle in providing consultancy to patients about sexual care, and do not feel comfortable and comfortable. It is recommended to strengthen nursing education curricula on sexual health and care