Derivations of abelian Lie algebra extensions

Let $0 \rightarrow A\rightarrow L {\rightarrow} B \rightarrow 0$ be an abelian extension of Lie algebras. In this paper, we construct certain exact sequences which relate derivations with the Lie algebra cohomology group $H^{2}(B,A)$, and apply them to study extending derivations of $A$ and lifting derivations of $B$ to certain derivations of $L$

Effect of Aloe vera on some indicators of cell damage after a period of aerobic exercise in male athletes

Introduction: Aloe vera is a medicinal plant with antioxidant activity. The purpose of this study was to determine the effect of Aloe vera on some indicators of cell damage after a period of aerobic exercise in male athletes of 15-18 years old. Methods: In this clinical trial study, 20 male students with average weight of 64.85 &plusmn; 51 and height of 172.05 &plusmn; 6.4 were randomly assigned to 2 groups of Aloe vera supplement (n = 10) and placebo (n = 10). Then aerobic training was conducted for 4 weeks. The supplemented group took 3 capsules, each capsule contains 2 g of dried Aloe vera and placebo group took 3 capsules/day containing dextran after every meal. To determine the index of cell injury markers creatine kinase (CK), lactate dehydrogenase (LDH) and reactive protein C (CRP) were determined and blood samples were collected 24 hours before and after each test. The data were analyzed using ANOVA and independent t test. Significance level was considered as P &le; .05. Results: The use of Aloe vera during aerobic exercise significantly reduced LDH (P = .006) in the supplement group (15 reduction) compared to placebo group and CRP with 11 reduction in the supplement group compared to placebo (P = .008). There was no significant reduction in CK. Conclusion: The findings of this study showed that Aloe vera reduces cell damage and inflammation indicators. This result may reflect the role of Aloe vera as anti-inflammatory and antioxidant agent.</p

Determining the effect of aloe Vera and aerobic exercise on lactate de-hydrogenase in male athletes

Aloe Vera is a medicinal plant as antioxidants reduce cell damage and used. The purpose of this study was to determine the effect of Aloe Vera on lactate de-hydrogenase after a period of aerobic exercise in male athletes. Methods This study applied the method according to the nature of the study, based on semi-empirical research and a review of the pre-test, post-test supplements and placebo groups, respectively. In this study,20 male students weight was 64.85 ± .51 and height was 172.05 ± 6.4 were randomly assigned to two groups of Imam Ali College of Physical Education Supplement (n = 10) and placebo (10 people). Then aerobic training was conducted for 4 weeks in the supplemented group were taking 3 capsules, each capsule contains 2 grams of dried Aloe Vera and placebo group were taking 3 capsules containing Dextrin daily after every meal. To determine the index of LDH were used and blood samples were collected 24 hours before and after each test Cooper with student in the lab. To describe data, analytical data, and for the mean and standard deviation of repeated measures ANOVA and independent T-test was used for comparison between groups Significance level was P ≤ 0.05. The use of Aloe Vera during aerobic exercise significantly, cautious reduced LDH (P=0.006) in the supplement group compared to placebo was 15 reduction. Conclusion: Overall the findings of this study showed that Aloe Vera reduces lactate de-hydrogenase. This result may reflect the role of Aloe Vera has anti-inflammatory and antioxidant

Hospital acquired diarrhea in a burn center of Tehran

Background and Objectives: Incidence of hospital-acquired diarrhea has increased rapidly and burn patients are at high risk of getting it. Infection with C. difficile is the most common cause of antibiotic associated diarrhea. The aim of this study was to determine the baseline characteristics and clinical presentation of hospital-acquired diarrhea and compare C. difficile and non-C. difficile diarrhea in burn patients treated at a burn center. Materials and Methods: During a 1-year study all patients with hospital-acquired diarrhea at Motahari Burn Hospital, Tehran, Iran enrolled in this study. We compared patients with a stool sample positive for C. difficile toxin or tracing the antigen in patients who were negative for detection of toxin in their stool sample specimens. Results: Diarrhea developed in 37 patients out of 3200 admitted patients with a mean burn size of 34.8 ±20.1. Among them, 8 patients had a positive result for C. difficile. The mean time between antibiotic therapy and occurrence of diarrhea was 9.5 ± 6.2 days. Nine (23.7) patients died in the 7.8± 4.2 days, mostly due to co-morbidities. The mean duration of diarrhea was 3.6 ± 2 days. Twenty two (57.9) patients were treated with oral metronidazol and eleven (28.9) patients were treated with combination of metronidazole and vancomycin, higher rate of combination therapy was seen in Clostridium difficile CDI. Conclusion: Overall, the prevalence of hospital-acquired diarrhea was 120/10,000 and 21 of them caused by infection with C. difficile. Presence of peripheral leukocytosis and colitis were the alarm sign for diagnosis of C. difficile infection. © 2015, Tehran University of Medical Science. All rights reserved

SiC and ZrO2 Weigh Percentage Effects on Microstructure of Al Based Matrix Composite Fabricated by Spark Plasma Sintering Method

SiC and ZrO2 particle are succesfully reaction synthesized from powder of Al, ZrO2 and SiC using spark plasma sintering method. The XRD of sintered composite and microstructure of the aas-sintered products. With the ZrO2 content increasing, the grains are remarkably refined and the and the ZrO2 and nano SiC particles are dispersing more uniformly in Al matrix, forming a homogeneous structure with the least porosity

Effect of sticky mat usage in control of nosocomial infection in motahary burn hospital

Background and Objectives: Infection is the most common cause of death among burnt patients and infection control decrease the rate of mortality. The use of sticky mat can control contamination by preventing the entrance microorganisms into the hospital wards. This study was designed to evaluate the sticky mats effect in reduction of microorganism�s entry by personnel shoes to burn intensive care unit (BICU). Materials and Methods: This is a simple cross sectional study. We tested outer soles of personnel�s shoes with swap and cultured them before and after sticky mat contact in the entrance of BICU. Results were analyzed with IBM SPSS version 22 software. McNemar and Wilcoxon Signed Ranks tests were used. Results: We analyzed 60 outer soles of the shoes before and after contact with sticky mats. Coagulase negative Staphylococci, Gram positive bacilli, Staphylococcus aureus, Aspergillus fumigatus, Pseudomonas aeruginosa and Acinetobacter baumannii were isolated before contact from 57 (95), 32 (53), 4 (6.7) and 3 (5) cases, respectively. Coagulase negative Staphylococci, Gram positive bacilli, Staphylococcus aureus, Aspergillus fumigatus, Pseudomonas aeruginosa were isolated after contact from 36 (60), 30 (50), 16 (26.6), 2 (3.3) and 3 (5) cases, respectively. No Acinetobacter was isolated after contact with sticky mat. Total isolated colonies before and after contact with sticky mats were 2573 and 830, respectively. There were significant statistically differences between the colony counts of coagulase ngative staphylococci, Gram positive bacilli, and Staphylococci aureus before and after contact with sticky mats (P. < 0.001). Conclusion: Regarding to statistical analysis, the effect of mat in removing the microorganisms was 56. It confirms the effectiveness of sticky mat controlling the infection and reducing the amount of hospital contamination. © 2016, Tehran University of Medical Science. All rights reserved

Serum testosterone in Arabian stallions during breeding and non-breeding seasons in Iran

The study was conducted to investigate the serum testosterone concentrations of Arabian stallions during breeding and non-breeding seasons under natural photoperiodic condition in west south of Iran (Khuzestan Province; latitude 48:40°N, longitude 31:20°E and altitude 22.5 m). The blood samples (10 ml) were collected from the jugular vein, and it stood at room temperature for 3 h and was centrifuged. The sera were kept at -20°C until assayed by radioimmunoassay. The results show that total serum testosterone levels (ng/ml) in Arabian stallions was higher in May to June (Summer Solstice; 1.08±0.078) than in November to December (Winter Solstice; 0.65±0.11) (p&lt;0.05). We conclude that serum testosterone concentration during the non-breeding season is lower than that of the breeding season. The results confirm a seasonal rhythm in the reproductive cycle of Arabian stallions over the year in this specific region.Key words: Arabian stallion, season, testosterone, photoperiod

Perfect transfer of m-qubit GHZ states

By using some techniques such as spectral distribution and stratification associated with the graphs, employed in [1,2] for the purpose of Perfect state transfer (PST) of a single qubit over antipodes of distance-regular spin networks and PST of a $d$-level quantum state over antipodes of pseudo-distance regular networks, PST of an m-qubit GHZ state is investigated. To do so, we employ the particular distance-regular networks (called Johnson networks) J(2m,m) to transfer an m-qubit GHZ state initially prepared in an arbitrary node of the network (called the reference node) to the corresponding antipode, perfectly. Keywords: Perfect state transferenc, GHZ states, Johnson network, Stratification, Spectral distribution PACs Index: 01.55.+b, 02.10.YnComment: 17 page

An innovative framework for real-time monitoring of pollutant point sources in river networks

Simultaneous identification of the location and release history of pollutant sources in river networks is an ill-posed and complicated problem, particularly in the case of multiple sources with time-varying release patterns. This study presents an innovative method for solving this problem using minimum observational data. To do so, a procedure is proposed in which, the number and the suspected reaches to the existence of pollutant sources are determined. This is done by defining two different types of monitoring stations with an adaptive arrangement in addition to real-time data collection and reliable flow and transport mathematical models. In the next step, the sources’ location and their release history are identified by solving the inverse source problem employing a geostatistical approach. Different scenarios are discussed for different conditions of number, release history and location of pollutant sources in the river network. Results indicated the capability of the proposed method in identifying the characteristics of the sources in complicated cases. Hence, it can be effectively used for the comprehensive monitoring of river networks for different purposes

Potential of Iranian wild barley (Hordeum vulgare ssp. spontaneum) in breeding for drought tolerance

The vast genetic resources of wild barley (Hordeum vulgare ssp. spontaneum, hereafter WB) may hold unique assets for improving barley (H. vulgare ssp. vulgare) cultivars for drought stress. To evaluate genetic potential and characterization of variation among a diverse collection of barley and WB genotypes, mostly originated from Iran, a field experiment was performed under three moisture environments (control, mild and intense drought stress) during two years (2012–2014). Considerable variation was observed among the wild and cultivated genotypes for drought tolerance and agronomic traits. Principal component analysis (PCA) grouped genotypes studied into three groups (WB, two-row barley and sixrow barley groups). However, Iranian and foreign WB genotypes were not completely separated, showing a high variation within both gene pools. The high significance of genotype by environment interaction, confirms importance of using accurate target environments for drought stress breeding. A number of WB genotypes with the highest values of the number of tillers, number of seed per spike, seed weight, grain yield and yield stability index under stressed environments were identified as superior genotypes. Most of these genotypes originate from Iran, highlighting the importance of this germplasm in barley breeding