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1.
Acta Psychol (Amst) ; 248: 104341, 2024 Jun 12.
Article in English | MEDLINE | ID: mdl-38870686

ABSTRACT

The use of glosses to aid vocabulary learning in second languages has been one of the most actively studied areas in computer-assisted language learning (CALL) literature. To compile research articles that examine the effect of utilizing glosses on second language (L2) vocabulary learning, the present study employed a second-order meta-analysis technique. The second-order meta-analysis is a study that synthesizes and analyzes the findings of multiple meta-analyses rather than individual primary studies, providing a higher level of abstraction and overview of existing evidence. The study synthesizes the results from seven primary meta-analyses conducted between 2008 and 2023, which included 136 original studies. Results showed that the overall mean effect size for using glosses was medium (g = 0.63 for the fixed-effect size model and 0.76 for the random-effect size model). The results showed that moderators had a significantly mitigated the effects of multimedia glosses. In particular, beginner-level students benefited greatly from being exposed to multimedia glosses, resulting in a large effect size. Additionally, the recognition test tended to produce a higher effect size compared to other types of vocabulary tests. Furthermore, glossing was found to be more effective in improving vocabulary acquisition in expository texts rather than narrative texts. Moreover, single-mode glosses were reported to be more effective than multi-mode glosses. The findings indicated that in-text glosses, out-text glosses, and bottom glosses exhibited a small effect size, whereas pop-up and margin glosses demonstrated a medium effect size. Implications for language learning and suggestions for future meta-analytic research are provided.

2.
Arab J Urol ; 22(2): 81-88, 2024.
Article in English | MEDLINE | ID: mdl-38481411

ABSTRACT

Objective: To compare the efficacy of tadalafil alone, dapoxetine alone, and tadalafil with dapoxetine as a combination therapy for the treatment of premature ejaculation. Patients and Methods: Eligible patients attended our andrology clinic with premature ejaculation were randomly allocated into three groups: group A (92 participants) received on-demand tadalafil, 5 mg; group B (91 participants) were given on-demand dapoxetine, 30 mg; and group C (89 participants) received on-demand combination of tadalafil, 5 mg, and dapoxetine, 30 mg. We assessed the changes in the intravaginal ejaculatory latency time (IELT) and the satisfaction scores 1, 2, and 3 months after treatment. Results: Highly statistically significant improvements were found in the mean IELT and satisfaction scores 1, 2, and 3 months post-treatment in all groups (P = <0.001). Post hoc analysis suggested this improvement was more pronounced in group C (P < 0.001). Conclusion: Both tadalafil and dapoxetine are effective in the treatment of patients with premature ejaculation, but the combination of both drugs gives better results.

3.
Cureus ; 15(8): e43845, 2023 Aug.
Article in English | MEDLINE | ID: mdl-37736460

ABSTRACT

BACKGROUND:  Handover is considered a basic nursing practice in which a patient's care information is moved to another nurse. Handover of patients after surgery is critical due to a number of care transitions, the presence of a surgical procedure, and the influence of anesthesia. High-quality postoperative handover is essential to safe patient care. Few studies have been conducted to evaluate the quality of current postoperative handover practices and the factors contributing to the quality of such processes, especially in Saudi Arabia. AIM:  The present research aimed at evaluating nurses' perceptions of postoperative handover quality and assessing factors impacting this process. This cross-sectional study targeted registered nurses with at least one year of professional experience who were actively involved in the conduction of postoperative handovers across various surgical departments. A total sample of 143 nurses was selected via a convenient sampling technique. Study instruments included Handover Quality Rating Form, patient status, and nurses' background characteristics. RESULTS:  Overall, postoperative handover quality was perceived as high by handing over and receiving nurses. Generally, 55.2% of nurses agreed on the different items supporting the positive circumstance for handover, and 92.3% agreed on the good conduct of handover compared to only 7.69% disagreement (p˂0.001). Significant agreements were observed for teamworking (p˂0.001), as well as four indicators (out of five) measuring the overall handover quality (p<0.001). The type of involved departments impacted significantly the handover quality perception (p=0.004). The respondents' age had a significant effect on quality (p=0.036), as well as circumstances of postoperative handover (p=0.046). Moreover, significant statistical differences were found for the circumstance of handover (p=0.031), as well as teamwork (p=0.019) according to the nurses' roles. Finally, the patient's blood circulation and respiration had a significant effect (p=0.023, p=0.033, respectively), as did the patient's level of consciousness (p=0.006) in the nurses' perception of the overall postoperative handover quality. CONCLUSION:  Postoperative handover quality was highly perceived by nurses. This research explored a multitude of factors such as patient health status and nurses' socio-demographic variables and their impact on nurses' perception of handover quality. Several nurse and patient-related factors were found to impact the handover process. This current research provided findings that could direct future improvements in nursing handover practice to ensure high-quality patient care.

4.
ACS Omega ; 8(4): 4337-4343, 2023 Jan 31.
Article in English | MEDLINE | ID: mdl-36743000

ABSTRACT

Hydrogen production technologies are attracting widespread interest in energy technologies. The conventional methods for hydrogen production suffer from high cost, restricting their production everywhere. Here, we use waste formation water from a petroleum field and carbon steel materials to produce hydrogen. The most suitable conditions have been investigated to maximize the hydrogen yield. In addition, an ionic liquid (i.e., tributylmethylammonium methyl carbonate, BMAMC) has been used to control the hydrogen generation reaction. We reveal that the amount of hydrogen release rapidly increases with decreasing pH of the solution from 6.7 to 2.5. A further increase in temperature resulted in more amount of hydrogen release. Our study investigates the influence of chloride ions on hydrogen generation activity. The results revealed that ionic liquid BMAMC remarkably decreases the amount of hydrogen release with an efficiency of 92% at 5.08 × 10-4 M. The addition of ionic liquid BMAMC into waste formation water increases the activation energy of the hydrogen generation reaction. The Langmuir model is the best isotherm describing the adsorption of BMAMC on carbon steel. Finally, to confirm the adsorption of the ionic liquid BMAMC, scanning electron microscopy and Fourier-transform infrared spectroscopy analysis were conducted.

5.
Clin Case Rep ; 10(2): e05440, 2022 Feb.
Article in English | MEDLINE | ID: mdl-35169474

ABSTRACT

If not detected early, euglycemic diabetic ketoacidosis can be a serious adverse effect of sodium-glucose cotransporter-2 (SGLT2) inhibitors. Unfortunately, euglycemic diabetic ketoacidosis is underreported in recent trials and missed because of normal blood sugar levels and nonspecific symptoms on presentation. We present two patients with type 2 diabetes mellitus who developed dapagliflozin-associated euglycemic diabetic ketoacidosis followed by hyperglycemic ketoacidosis. The second patient had euglycemic ketoacidosis twice despite instructions to stop using the medication dapagliflozin.

6.
ACS Omega ; 6(40): 26640-26645, 2021 Oct 12.
Article in English | MEDLINE | ID: mdl-34661017

ABSTRACT

A promising potential device for storage of large amounts of energy is Mg-air batteries. However, the corrosion of the Mg electrode inside the battery electrolyte limits the battery's capacity to store energy. We present a new strategy to protect the Mg electrode from corrosion and increase the life cycle of Mg batteries in this article. The Mg electrode is coated with a conductive nanocomposite (PANI@3D-FCNT) in this technique. To better understand the anticorrosion properties of PANI@3D-FCNTs and their effect on the battery efficiency, electrochemical and battery tests are used. We discovered that PANI@3D-FCNT plays the most promising role in reducing Mg electrode corrosion in 3.5 wt % NaCl electrolyte, with an efficiency of 93.9%. The battery with the coated Mg electrode has a longer discharge time and a slower drop in operating voltage. The PANI@3D-FCNT nanocomposite will prolong the life of the Mg-air battery and keep the Mg electrode active for a long time. This work outstandingly provides an effective strategy to address the defects in the Mg-air batteries arising from electrode corrosion successfully. The work is a great way to open up new avenues for introducing new conductive nanocomposites in metal-air battery designs without using traditional methods.

7.
J Ultrasound ; 24(2): 183-189, 2021 Jun.
Article in English | MEDLINE | ID: mdl-33400253

ABSTRACT

INTRODUCTION: The Abdominal Compartment Society (WSACS) developed a medical management algorithm with a stepwise approach to keep intra-abdominal pressure (IAP) ≤ 15 mm Hg. The role of point-of-care ultrasound (POCUS) as a bedside modality in the critical care patients is not well studied in relation to the intra-abdominal hypertension (IAH) management algorithm. AIM: To test the role of point-of-care ultrasound (POCUS) in the medical management of patients with intra-abdominal hypertension (IAH). METHOD: We conducted a prospective observational study. Those who met the inclusion criteria were assigned to undergo POCUS and small bowel ultrasound as adjuvant tools in their IAH management. RESULTS: A total of 22 patients met the inclusion criteria and were included in the study. The mean age of the study participants was 65 ± 22.6 years, 61% were men, and the most frequent admission diagnoses were hepatic encephalopathy and massive ascites (five cases). Ultrasound and abdominal X-rays were comparable in confirming correct NGT position, but the ultrasound was superior in determining the gastric content (fluid vs. solid) and diagnoses of gastric paresis in two cases. Small bowel obstruction was present in four patients and confirmed with abdominal CT; two of the patients underwent surgical intervention for mesenteric vessel occlusion and transmesenteric internal hernia. Enema treatment was found to empty the bowel incompletely 72%, 56%, and 42% of the time on days 1, 2, and 3, respectively. Four patients with cirrhosis admitted with upper gastrointestinal bleeding and hepatic encephalopathy (out of a total of 8) were found to have large amounts of ascites, and US-guided paracentesis was performed. CONCLUSION: POCUS can be used in the nonoperative management of IAH. It is an important tool in the diagnosis and treatment of patients with IAH.


Subject(s)
Intra-Abdominal Hypertension , Adult , Aged , Aged, 80 and over , Critical Care , Female , Humans , Intra-Abdominal Hypertension/diagnostic imaging , Intra-Abdominal Hypertension/therapy , Male , Middle Aged , Point-of-Care Systems , Point-of-Care Testing , Ultrasonography
8.
J Psycholinguist Res ; 50(3): 543-562, 2021 Jun.
Article in English | MEDLINE | ID: mdl-31997130

ABSTRACT

This study aims to investigate the acquisition of vocabulary recognition and vocabulary production in the short-and- long-term via listening and reading comprehension activities using ®Voice software. Sixty participants were invited to read or listen to two passages in different sessions, that is, three sessions in listening inputs and one session in reading comprehension. The materials in reading comprehension input were converted into audio and given for the students who were assigned to participate in the listening sessions. Vocabulary recognition was measured through written multiple-choice tests, whereas the vocabulary production was assessed by a cloze test for both scenarios. Each test was administered before the intervention immediately after the intervention and at a delayed post of time for both inputs. Results showed that the students were able to learn new vocabulary from both modes in the pre-post-delayed treatments. Participants scored higher in recognition vocabulary test than in the production test. In view of the vocabulary gains in both scenarios in the post-tests, the performance of listeners was significantly lower than that of readers after the first session, which was almost the same after the second session, and significantly higher after the third listening session. However, vocabulary acquisition from listening comprehension mode was significantly higher than that from reading input in the delayed post-tests.


Subject(s)
Reading , Vocabulary , Comprehension , Humans , Language , Language Tests
9.
Heart Views ; 21(2): 88-96, 2020.
Article in English | MEDLINE | ID: mdl-33014301

ABSTRACT

In 1992, the Brugada brothers published a patient series of aborted sudden death, who were successfully resuscitated from ventricular fibrillation (VF). These patients had a characteristic coved ST-segment elevation in the right precordial leads on their 12-lead electrocardiogram with no apparent structural heart abnormality. This disease was referred to as "right bundle branch block, persistent ST-segment elevation, and sudden death syndrome." The term Brugada syndrome (BrS) was first coined for this new arrhythmogenic entity in 1996. BrS is more prevalent in Southeast Asian ethnic groups and was considered a familial disease due to the presence of syncope and/or sudden deaths in several members of the same family, however, the genetic alteration was only noted in 1998. The genetic characterization of BrS has proven to be challenging. The most common and well-established BrS genotype involves loss-of-function mutations in the SCN5A gene, but only represents between 15% and 30% of the diagnosed patients. Patients with BrS can present with a range of symptoms which can include syncope, seizures, and nocturnal agonal breathing due to polymorphic ventricular tachycardia or VF. If these arrhythmias are sustained, sudden cardiac death may result. Despite the significant progress on the understanding of BrS over the last two decades, there remain a number of uncertainties and challenges; we present an update review on the subject.

10.
BMC Cardiovasc Disord ; 20(1): 182, 2020 04 19.
Article in English | MEDLINE | ID: mdl-32306901

ABSTRACT

BACKGROUND: Combined oral contraceptive pills are associated with an established risk for venous thrombosis; however, their risk for arterial thrombosis remains uncertain, especially with the development of low dose new generations of combined oral contraceptive. Arterial thrombosis is less likely to occur with the use of oral contraceptive pills in the absence of cardiovascular risk factors. CASE PRESENTATION: We report a 35-year old female with no cardiovascular risk factors who presented with thrombotic anterior wall myocardial infarction 6 months after using a third generation low dose combined oral contraceptive pills (Marvelon; ethinylestradiol 30 mcg and desogestrel 150 mcg). CONCLUSION: Third generation low dose combined oral contraceptives may lead to myocardial infarction in young women, even in the absence of other cardiovascular risk factors.


Subject(s)
Anterior Wall Myocardial Infarction/chemically induced , Contraceptives, Oral, Combined/adverse effects , Contraceptives, Oral, Hormonal/adverse effects , Contraceptives, Oral, Synthetic/adverse effects , Desogestrel/adverse effects , Thrombosis/chemically induced , Adult , Anterior Wall Myocardial Infarction/diagnostic imaging , Anterior Wall Myocardial Infarction/drug therapy , Anticoagulants/therapeutic use , Contraceptives, Oral, Combined/administration & dosage , Contraceptives, Oral, Hormonal/administration & dosage , Contraceptives, Oral, Synthetic/administration & dosage , Desogestrel/administration & dosage , Enoxaparin/therapeutic use , Female , Humans , Risk Factors , Thrombosis/diagnostic imaging , Thrombosis/drug therapy , Treatment Outcome
11.
J Psycholinguist Res ; 49(3): 435-451, 2020 Jun.
Article in English | MEDLINE | ID: mdl-32072431

ABSTRACT

Second language writing researchers have examined the affordances of Automated Writing Evaluation programs in providing immediate feedback that helps improve students' writing outputs. However, a little is known about tracking learners' process during writing essays and whether much/less pauses made by learners could predict good/poor quality of students' writing output. This article aims to address this issue by recording a case study of 8 postgraduate students' pauses during writing two types of text genre; descriptive and argumentative essays. Their pauses have been recorded using Keystroke logging program-Input Log 7.0 (Leijten and Van Waes in Writ Commun 30:358-392, 2013. https://doi.org/10.1177/0741088313491692) and their screen activities were captured by Active Presenter program. Findings revealed that the students' pauses were significantly higher in word boundary than in sentence and/or paragraph boundaries. Moreover, on word boundary, pauses before words were significantly higher than that after words for both types of text genre. Concerning pauses across text genre, students' pauses were significantly higher in the argumentative essay than that of the descriptive essay. Multiple regression revealed negative correlation between much pauses and poor quality of students' product in the descriptive essay while there was no correlation found in the argumentative essay.


Subject(s)
Cognition , Language , Multilingualism , Writing , Adult , Education, Graduate , Female , Humans , Students
12.
Rev Environ Health ; 34(2): 153-169, 2019 Jun 26.
Article in English | MEDLINE | ID: mdl-31085749

ABSTRACT

Introduction Obstructive sleep apnea (OSA) is a widely prevalent sleep-related breathing disorder, which leads to several life-threatening diseases. OSA has systemic effects on various organ systems. Untreated OSA is associated with long-term health consequences including hypertension, heart disease, diabetes, depression, metabolic disorders, and stroke. In addition, untreated OSA is reported to be associated with cognitive dysfunction, impaired productivity at the workplace and in an increased risk of motor vehicle accidents (MVAs) resulting in injury and fatality. Other consequences of OSA include, but are not limited to, impaired vigilance, daytime somnolence, performance deficits, morning headaches, mood disturbances, neurobehavioral impairments, and general malaise. Additionally, OSA has become an economic burden on most health systems all over the world. Many driving license regulations have been developed to reduce MVAs among OSA patients. Methods Studies of the personal, societal, public health, and legal aspects of OSA are reviewed. Data were collected through the following databases: MEDLINE, Google Scholar, Scopus, SAGE Research Methods, and ScienceDirect. Conclusion OSA leads to worsening of patients' personal relationships, decreasing work productivity, and increasing occupational accidents as well as MVAs. The costs of undiagnosed and untreated OSA to healthcare organizations are excessive. Thus, proper management of OSA will benefit not only the patient but will also provide widespread benefits to the society as a whole.


Subject(s)
Public Health/statistics & numerical data , Sleep Apnea, Obstructive/epidemiology , Sleep Apnea, Obstructive/prevention & control , Accidents, Occupational/statistics & numerical data , Accidents, Traffic/statistics & numerical data , Humans , Interpersonal Relations , Prevalence , Sleep Apnea, Obstructive/economics , Sleep Apnea, Obstructive/etiology
13.
J Psycholinguist Res ; 48(5): 1005-1023, 2019 Oct.
Article in English | MEDLINE | ID: mdl-30993570

ABSTRACT

This article investigates how the use of a deliberate approach of analyzing a given reading may predict differences in CVA effectiveness. Sixty Arab EFL learners were randomly assigned to an experimental group and a control group, thirty participants for each. The experimental group received training in the deliberate Clarke and Nation (System 8:211-220, 1980) CVA technique, whereas the control group were not guided through a training method. Then, both groups were asked to answer three vocabulary tests and then participate to finish a series of six readings adjusted using Nation's K-level reading lexicon to control the difficult words during readings. After treatments, the students took a post-test vocabulary session. Results show that the group that have used the deliberate CVA technique retained about twice as many new words as the other group did. That is the use of a deliberate-CVA methodology significantly improves learning. The experimental manipulation produced a learning effect that was 76.1% greater than that of the control group in terms of word context recognition and 128.0% greater than that of the control group in terms of word definition accuracy. Pedagogical implications, limitations and directions for further research are discussed.


Subject(s)
Arabs , Language , Learning/physiology , Reading , Vocabulary , Adult , Female , Humans , Language Tests , Multilingualism , Young Adult
14.
Cardiol J ; 26(3): 226-232, 2019.
Article in English | MEDLINE | ID: mdl-29611170

ABSTRACT

BACKGROUND: Awareness of risks associated with radiation exposure to patients and medical staff has significantly increased. It has been reported before that the use of advanced three-dimensional electroanatomical mapping (EAM) system significantly reduces fluoroscopy time, however this study aimed for zero or near zero fluoroscopy ablation to assess its feasibility and safety in ablation of atrial fibrillation (AF) and other tachyarrhythmias in a "real world" experience of a single tertiary care center. METHODS: This was a single-center study where ablation procedures were attempted without fluoroscopy in 34 consecutive patients with different tachyarrhythmias under the support of EAM system. When transseptal puncture (TSP) was needed, it was attempted under the guidance of intracardiac echocardiography (ICE). RESULTS: Among 34 patients consecutively enrolled in this study, 28 (82.4%) patients were referred for radiofrequency ablation (RFA) of AF, 3 (8.8%) patients for ablation of right ventricular outflow tract (RVOT) ventricular extrasystole (VES), 1 (2.9%) patient for ablation of atrioventricular nodal reentry tachycardia (AVNRT), 2 (5.9%) patients for typical atrial flutter ablation. In 21 (62%) patients the en- tire procedure was carried out without the use of fluoroscopy. Among 28 AF patients, 15 (54%) patients underwent ablation without the use of fluoroscopy and among these 15 patients, 10 (67%) patients required TSP under ICE guidance while 5 (33%) patients the catheters were introduced to left atrium through a patent foramen ovale. In 13 AF patients, fluoroscopy was only required for double TSP. The total procedure time of AF ablation was 130 ± 50 min. All patients referred for atrial flutter, AVNRT, and VES of the RVOT ablation did not require any fluoroscopy. CONCLUSIONS: This study demonstrates the feasibility of zero or near zero fluoroscopy procedure including TSP with the support of EAM and ICE guidance in a "real world" experience of a single tertiary care center. When fluoroscopy was required, it was limited to TSP hence keeping the radiation dose very low.


Subject(s)
Arrhythmias, Cardiac/surgery , Catheter Ablation , Electrophysiologic Techniques, Cardiac , Radiation Dosage , Radiation Exposure/prevention & control , Radiography, Interventional , Adult , Aged , Arrhythmias, Cardiac/diagnosis , Arrhythmias, Cardiac/physiopathology , Catheter Ablation/adverse effects , Echocardiography , Feasibility Studies , Female , Fluoroscopy , Humans , Male , Middle Aged , Operative Time , Predictive Value of Tests , Radiation Exposure/adverse effects , Radiography, Interventional/adverse effects , Risk Factors , Time Factors , Treatment Outcome
16.
PLoS One ; 12(5): e0176664, 2017.
Article in English | MEDLINE | ID: mdl-28505210

ABSTRACT

Celiac disease (CD), a multi-factorial auto-inflammatory disease of the small intestine, is known to occur in both sporadic and familial forms. Together HLA and Non-HLA genes can explain up to 50% of CD's heritability. In order to discover the missing heritability due to rare variants, we have exome sequenced a consanguineous Saudi family presenting CD in an autosomal recessive (AR) pattern. We have identified a rare homozygous insertion c.1683_1684insATT, in the conserved coding region of AK5 gene that showed classical AR model segregation in this family. Sequence validation of 200 chromosomes each of sporadic CD cases and controls, revealed that this extremely rare (EXac MAF 0.000008) mutation is highly penetrant among general Saudi populations (MAF is 0.62). Genotype and allelic distribution analysis have indicated that this AK5 (c.1683_1684insATT) mutation is negatively selected among patient groups and positively selected in the control group, in whom it may modify the risk against CD development [p<0.002]. Our observation gains additional support from computational analysis which predicted that Iso561 insertion shifts the existing H-bonds between 400th and 556th amino acid residues lying near the functional domain of adenylate kinase. This shuffling of amino acids and their H-bond interactions is likely to disturb the secondary structure orientation of the polypeptide and induces the gain-of-function in nucleoside phosphate kinase activity of AK5, which may eventually down-regulates the reactivity potential of CD4+ T-cells against gluten antigens. Our study underlines the need to have population-specific genome databases to avoid false leads and to identify true candidate causal genes for the familial form of celiac disease.


Subject(s)
Adenylate Kinase/genetics , Alleles , Celiac Disease/genetics , Consanguinity , Exome , Genetic Variation , High-Throughput Nucleotide Sequencing , Adenylate Kinase/chemistry , Chromosome Mapping , Computational Biology , Evolution, Molecular , Female , Genotype , Humans , Hydrogen Bonding , Inheritance Patterns , Male , Models, Molecular , Mutation , Pedigree , Penetrance , Protein Conformation , Saudi Arabia
17.
Praxis (Bern 1994) ; 106(11): 571-572, 2017.
Article in German | MEDLINE | ID: mdl-28537119
18.
Acta Pol Pharm ; 74(1): 103-109, 2017 Jan.
Article in English | MEDLINE | ID: mdl-29474766

ABSTRACT

Tellurium (Te) is a semiconductor and is frequently doped with copper, tin, gold or silver. It is also used to color glass and ceramics and is one of the primary ingredients in blasting caps. Te is little known about its biological activity but it is well known for toxic to human and animals. It has inhibited the lipids profiles and oxidative stress in the brain of the mice. Sodium tellurite 4.15, 8.3 and 16.6 mg/kg (1/20, 1/10 and 1/5 of LD50, respectively) was given to male Wistar rats orally in saline for a period of 15 days. On day 16, the blood was collected and the livers were dissected out for biochemical assays. The hepatotoxicity biomarkers [biliru- bin, aspartate aminotransferase (AST), alanine transaminase (ALT), and alkaline phosphatase (ALP)] were ele- vated significantly and dose dependently in the serum of Te treated groups as compared to control group. The content of thiobarbituric acid reactive substances in Te treated groups was increased significantly and dose- dependently as compared to control group. Conversely, the content of glutathione and activities of antioxidant enzymes (glutathione peroxidase, glutathione reductase, glutathione-S-transferase, superoxide dismutase and catalase) were decreased significantly in Te treated groups as compared to control group. No data of effect of inorganic Te compounds on the liver toxicity of rats are available. The aim of the present study was to evalu- ate the hepatotoxicity of inorganic Te compounds. In conclusion, Te accelerated hepatotoxicity and oxidative stress in liver tissue of rats.


Subject(s)
Chemical and Drug Induced Liver Injury/etiology , Tellurium/toxicity , Animals , Chemical and Drug Induced Liver Injury/metabolism , Dose-Response Relationship, Drug , Male , Oxidative Stress/drug effects , Rats , Rats, Wistar
19.
Acta Pol Pharm ; 73(3): 675-82, 2016.
Article in English | MEDLINE | ID: mdl-27476286

ABSTRACT

Tellurium (Te) is a semiconductor and is frequently doped with copper, tin, gold or silver. It is also used to color glass and ceramics and is one of the primary ingredients in blasting caps. Little is known about Te biological activity but it is well known for toxicity to human and animals. It has inhibited the lipids profiles and oxidative stress in the brain of mice. Sodium tellurite 4.15, 8.3 and 16.6 mg/kg (1/20, 1/10 and 1/5 of LD50, respectively) was given to male Wistar rats orally in saline for a period of 15 days. On day 16, the blood was collected and the livers were dissected out for biochemical assays. The hepatotoxicity biomarkers [bilirubin, aspartate aminotransferase (AST), alanine transaminase (ALT) and alkaline phosphatase (ALP)] were elevated significantly and dose dependently in the serum of Te treated groups as compared to control group. The content of thiobarbituric reactive substances in Te treated groups was increased significantly and dose-dependently as compared to control group. Conversely, the content of glutathione and activities of antioxidant enzymes (glutathione peroxidase, glutathione reductase, glutathione-S-transferase, superoxide dismutase and catalase) were decreased significantly in Te treated groups as compared to control group. No data of inorganic Te compounds on the liver toxicity of rats are available. The aim of the present study was to evaluate the hepatotoxicity of inorganic Te compound. In conclusion, Te accelerated hepatotoxicity and oxidative stress in liver tissue of rats.


Subject(s)
Chemical and Drug Induced Liver Injury/pathology , Tellurium/toxicity , Alanine Transaminase/blood , Alkaline Phosphatase/blood , Animals , Aspartate Aminotransferases/blood , Chemical and Drug Induced Liver Injury/enzymology , Dose-Response Relationship, Drug , Male , Oxidative Stress/drug effects , Rats , Rats, Wistar , Tellurium/administration & dosage
20.
Sensors (Basel) ; 16(4)2016 Apr 06.
Article in English | MEDLINE | ID: mdl-27058539

ABSTRACT

In recent years, there has emerged applications of vehicular ad hoc networks (VANETs) towards security, safety, rescue, exploration, military and communication redundancy systems in non-populated areas, besides its ordinary use in urban environments as an essential part of intelligent transportation systems (ITS). This paper proposes a novel algorithm for the process of organizing a cluster structure and cluster head election (CHE) suitable for VANETs. Moreover, it presents a robust clustering-based routing protocol, which is appropriate for deserts and can achieve high communication efficiency, ensuring reliable information delivery and optimal exploitation of the equipment on each vehicle. A comprehensive simulation is conducted to evaluate the performance of the proposed CHE and routing algorithms.

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