Qualitative and Quantitative Investigation of Biochar-Cu0 Composite for Nickel Adsorption.

The current investigation deals with the treatment of water pollution that is caused by the leaching of nickel ions from the metallurgical industry and new-energy batteries. Therefore, an eco-friendly treatment of nickel through the use of a composite of cotton stalk biochar with nanozerovalent copper has been presented in this investigation signifying the impact of zerovalent copper in enhancing the adsorption capacity of biochar for nickel adsorption. Thermogravimetric analysis data showed the adsorbent to be significantly stable in the higher thermal range, whereas transmission electron microscopy analysis confirmed the particles to be 27 nm and also showed the cubic geometry of the particles. A much closer scanning electron microscopy analysis shows the morphology of particles to be cubic in shape. Batch adsorption indicated a positive influence of pH increase on adsorption due to the electrostatic attraction between positive nickel ions and post point of zero charge (pHPZC) negative surface of copper biochar composite (pH > 5.5). A high adsorption rate was observed in the first 60 min, whereas adsorption increased with the increase in temperature from 303 to 318 K. Kinetic modeling confirmed the pseudo-first-order to fit best to the data. The apparent activation energy (11.96 kJ mol-1) is indicative of the chemical nature of the process. The adsorption data fitted well to the Langmuir adsorption model. The negative values of apparent ΔG° and the positive values of apparent ΔH° indicate the spontaneity and endothermicity of the process, respectively, whereas the positive values of apparent ΔS° point toward increased randomness during the process. Postadsorption XPS suggests the adsorption of nickel on the surface of biochar composites in the form of Ni(OH)2 and NiO(OH).

Frequency of transfusion transmissible infections among blood donors of Rawalpindi District, Pakistan.

Background: Transmissible Infections (TTI's) are a cause of significant burden on health care facilities by imposing a threat of infection transmission through disease reservoirs in asymptomatic donors. This eventually leads to a serious challenge in acquiring blood bags in a country like Pakistan where transfusion dependent disease are of high prevalence. The objective of this study is to determine the seroprevalence of TTI's in blood donors in Rawalpindi District through a multi-center approach. Materials and Methods: This is an observational descriptive retrospective study based on 6 transfusion centers in the Rawalpindi District. The time frame of the study was from January 2015 to December 2018. A total of 223,242 donors were consecutively included and data on donor type, the purpose of transfusion, and seroprevalence (HBV, HCV, HIV, Syphilis, and Malaria) were collected through a structured questionnaire and laboratory investigation results. The collected data were entered in SPSS version 21.0 for analysis. Results: The seroprevalence of blood borne infections was 7,897 (3.537%) of which HBV, HCV, HIV, Syphilis and Malaria accounted for 2410 (1.080%), 3105(1.391%), 0(0.000%), 2017 (0.933%) and 365 (0.171%), respectively. Reactive samples reduced from 4.850% to 3.537% over 4 years, while there was a rise of 37.478% of blood donors from 2015 to 2018. The total number of voluntary donors and replacement donors was 22079 (9.890%) and 201156 (90.107%), with a rising incidence in voluntary donors from 2015 to 2018. A considerable number of donor bags were transfused to Thalassemia, Anemia, Leukemia and Hemophilia patients, 28156 (12.612%). This number also showed increasing rates from 11.654% to 14.017%. Conclusion: In conclusion, our study suggests that the risk of transmission through transfusion is still considerable. Targeting donors with a low-risk profile, a screening questionnaire, an ample supply of quality screening tests, and awareness campaigns for the diseases in question must be carried to further decrease the risk of transmission of TTIs in Pakistan.

An Unusual Presentation of type-IV Second Branchial Cyst: A Case Report.

Second branchial cleft cysts are a cystic dilatation of the remnant of the second branchial cleft that account for 95-percent of all branchial cleft malformations, along with second branchial fistulae and sinuses. Among them, the type-IV second branchial cyst is present against the pharyngeal wall in the parapharyngeal space and is rarest of all. Herein we report a rare presentation of type-IV second branchial cyst where MRI played a critical role for accurate preoperative diagnosis. The transcervical approach is a safe and effective technique for proper exposure and hence total surgical excision in such cases.

Factors contributing to distress among school and college-going adolescents during COVID-19 Lockdown: A cross-sectional study conducted in Sibi Balochistan, Pakistan.

BACKGROUND: Due to the COVID-19 pandemic, many countries have implemented nationwide lockdowns. While this leads to a decrease in disease transmission, there is a concurrent increase in the levels of psychological distress. To estimate the levels of psychological distress in school- and college-going adolescents currently under lockdown and to determine the factors associated with this psychological distress. MATERIALS AND METHODS: A cross-sectional study conducted in Army Public School and College (APSAC) Sibi, Balochistan province of Pakistan between March and May 2020. Students of APSAC Sibi were enrolled in this research. Modified Kuppuswamy Socioeconomic Scale, Godin Leisure-Time Exercise Questionnaire, and Kessler-10 were used for data acquisition. Chi-square and t-tests and univariate analysis (nonparametric test) were performed using the Statistical Package for the Social Sciences (SPSS) version 23.0 (IBM, Armonk, US). RESULTS: Out of 225 participants, 57.4% were studying at school. Sixty-four percent of the participants were likely to be suffering from psychological distress. There is a significant effect of physical activity, sleep duration, bedtime at night, screen-time duration, and COVID-19 positive family member on the levels of distress. A moderate positive correlation was between psychological distress and bed-time at night (rho[223] = 0.328, P < 0.001) and screen time duration (rho[223] = 0.541, P < 0.001). A moderate negative correlation of physical activity (rho[223] = -0.340, P < 0.001) and a weak negative correlation of sleep duration hours (rho[225] = -0.158, P = 0.018) was found with psychological distress levels. CONCLUSIONS: The COVID-19 lockdown and pandemic have had a considerable psychological impact on both school-going and college-going students, showing increased level of stress. A strong public health campaign along with mental and physical and social support programs are the need of the hour.

Novel nanocomposite of biochar-zerovalent copper for lead adsorption.

In this study, a composite of zerovalent copper-biochar was investigated for its ability to remove lead from water. The prepared material was characterized by using scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), X-ray diffractomter (XRD), and X-ray photoelectron spectroscopy (XPS). The pH effect on adsorption of lead was investigated within the range of 2-8 and the effect of temperature was studied at 303, 308, 313, and 318 K. The kinetics of lead adsorption on biochar composite was evaluated and the equilibrium time of 12 hr was established. To further evaluate the nature of adsorption, Langmuir model was tested and the adsorption capacities were evaluated for lead adsorption on the surface of copper biochar composite. The activation energy, entropy, and enthalpy values indicated the adsorption phenomenon to be chemisorptive and spontaneous in nature. Comparison of adsorption capacities with the reported adsorbents in the literature concluded zerovalent copper-biochar composite to be an efficient adsorbent for the removal of lead in the experimental conditions under study. RESEARCH HIGHLIGHTS: Highly efficient composite of zerovalent copper with biochar was synthesized for lead adsorption. XPS and XRD shows the presence of zerovalent copper in the biochar composite. pH and temperature were the main governing factors in the adsorption process. Adsorption capacity for lead is higher than many of the reported adsorbents.

Microbial Patterns and Antibiotic Susceptibility in Blood Culture Isolates of Septicemia Suspected Children in the Pediatrics Ward of a Tertiary Care Hospital.

Objectives This study aims to determine microbial patterns and antibiotic susceptibility to alert clinicians to the emerging pathogens that may pose a threat to the community, especially children. Materials and Methods This retrospective cross-sectional study was conducted in the Department of Pathology, Holy Family Hospital, Rawalpindi, Pakistan, from July 2019 to December 2019. Two samples were taken from two different sites of each patient at the time of fever (> 100° F) to avoid chances of contamination. A blood sample of 5 to 10 mL was drawn from each site. In a 50 mL brain heart infusion broth (BHIB), 5 to 10% blood was injected in two different bottles and incubated for 48 hours at 37°C. After 48 hours, subculture was done by streaking the drops of blood samples taken from BHIB on blood and MacConkey agar. Cultures were incubated in aerobic conditions at 37°C for 24 to 48 hours. For testing antibiotic susceptibility, criteria defined by the Clinical and Laboratory Standards Institute (CLSI) were followed. Microbes were identified under a microscope by observing their morphological characteristics after gram staining and applying biochemical tests. Antibiotic sensitivity test was performed using standard aseptic methods. Statistical Analysis Bacterial isolates and their susceptibility patterns were represented using frequencies and percentage charts. Results Out of 423 blood cultures, growth was recorded in 92 (21.75%) of the cultures with female to male ratio 2.1:1. The gram-positive bacteria accounted for 43.48% ( n = 40), whereas gram-negative bacteria covered the majority 54.36% ( n = 50). Among isolates, Staphylococcus aureus (42.39%) was the most common, followed by Acinetobacter spp. (17.39%) and Pseudomonas aeruginosa (14.13%). Acinetobacter spp. showed 0% susceptibility to amikacin and cefotaxime. All the isolates were 100% resistant to amoxicillin-clavulanic acid. S. aureus showed lower sensitivity for ceftazidime (0%), clindamycin (66.67%), ciprofloxacin (0%), clarithromycin (11.76%), and ceftriaxone (0%). Tigecycline showed 100% sensitivity for all isolates tested. Conclusion Gram-negative bacteria form the majority of isolates in our setup, with Acinetobacter as the most common species among them. The resistance against cephalosporins, penicillin, and fluoroquinolones shown by Acinetobacter , Pseudomonas , Salmonella, and Klebsiella is of grave concern. Among gram-positive bacteria, S. aureus has established resistance against multiple drugs. Limited and objective use of antibiotic therapy is a much-needed strategy under new guidelines.

Changes in Hematological Parameters and Liver Enzymes During Laparoscopic Cholecystectomy.

Background Changes in hematological parameters, such as neutrophils, leukocytes, neutrophil-lymphocyte ratio, platelet lymphocyte ratio, and mean platelet volume, have been observed during laparoscopic surgeries. Objectives The objectives of this research were to assess the changes in hematological parameters and liver enzymes during laparoscopic cholecystectomy (LC). Methods This prospective observational study included patients undergoing laparoscopic cholecystectomy for symptomatic cholelithiasis. Patients with comorbidities, including hepatitis, diabetes, and where laparoscopic cholecystectomy was converted to open cholecystectomy, were excluded. Preoperative and postoperative baseline hematological parameters and liver function tests (LFTs) were recorded. Characteristics like age, gender, body mass index (BMI), indication for surgery, duration of surgery, the pressure of pneumoperitoneum, and the duration of hospital stay were noted. A paired sample t-test was applied to assess the difference between the mean pre and postoperative values of different hematological parameters. Results It was observed that hemoglobin (Hb), hematocrit (Hct), platelets, and alkaline phosphatase (ALP) decreased postoperatively. However, mean corpuscular volume (MCV), mean platelet volume (MPV), leukocytes, and alanine transaminase (ALT) increased postoperatively. The difference in mean Hb, MCV, Hct, leukocytes, MPV, and ALT was statistically significant (p<0.05). Conclusion There were significant changes in the levels of hematological parameters and liver enzymes during LC.

Relationship between knowledge on COVID-19 and psychological distress among students living in quarantine: an email survey.

Psychological distress is a generic term which refers to "feeling of emotional strain" that affects our normal mental and physical functioning. The aim of this study is to investigate the psychological distress perceived by the Pakistani students living in quarantine and to determine risk and protective factors, including knowledge of COVD-19, among this population. It is a descriptive cross-sectional study conducted from February to May 2020. Students enrolled at different colleges and universities of Pakistan participated in this survey. One-way analysis of variance (ANOVA) is computed for comparing knowledge scores of participants having different levels of psychological distress. A total of 937 participants completed the survey questionnaire, with slightly more male respondents (60.6%) than female (39.4%). The average age of survey participants is 22.0 years (SD = 3.01), with majority (76.2%) belonging to urban areas. The mean COVID-19 knowledge score is 8.91 (SD = 1.69, range: 1-12), suggesting an overall 74.25% precision rate for this knowledge test for individual participant. The participants scored least knowledge regarding the disease transmission, showing a percentage correctness of only 40%. Majority of the participants (57.3%) are likely to be well, while others (42.7%) have shown symptoms of mental distress. The analysis reveals that participants with moderate mental distress (M = 8.81, SD = 2.37) and those with severe mental distress (M = 8.75, SD = 2.69) scored lower than participants who were likely to be well (M = 9.49, SD = 1.71). Our study concludes that a higher knowledge base regarding the disease will help to mitigate distress levels. Our study suggests that in order to deal with this pandemic effectively, the knowledge regarding COVID-19 should be properly conveyed to general public. It is need of the hour to address mental issues of the population aggressively along with providing awareness about COVID-19.

Comparison of Mean Fluoroscopic Time and Mean Contrast Volume Used in Patients Undergoing Coronary Angiography by the Transfemoral Versus Transradial Route.

Introduction The prolonged fluoroscopic time during coronary angiography results in a higher radiation dose delivered to patients. Similarly, a higher contrast volume used is associated with higher rates of contrast-induced nephropathy. This study was designed to identify the better technique in terms of lesser fluoroscopic time and volume of contrast used during the procedure. Objective To compare mean fluoroscopic time and mean contrast volume used in patients undergoing coronary angiography through the transfemoral versus transradial route. Methods A randomized controlled trial (RCT) was conducted at the department of cardiology, Pakistan Institute of Medical Sciences (PIMS) Islamabad between June 2017 and December 2017. Ninety (n=90) patients planned for coronary angiography between 30 and 70 years of age were enrolled. Patients were randomly allocated to Group A (transfemoral route group) and Group B (transradial route group). Fluoroscopic time (minutes) and contrast volume (milliliters) used were measured in each patient. Results The mean contrast volume used in Group A was 70.4 ml (SD=8.7) and in Group B, it was 90.1 ml (SD=9.8) (P<0.001). The mean fluoroscopic time in Group A was 5.1 min (SD=1.2), and in group B, it was 8.6 min (SD=1.2) (P<0.001). Similar trends were noted when data were stratified with respect to age and gender. Conclusion The mean fluoroscopic time and the mean contrast volume were significantly less in patients where coronary angiography was performed through the transfemoral route than through the transradial route in this study.

Personality Dynamism and Academic Performance Among Boarders and Non-boarders Studying in a Medical University.

Introduction The personality of a human being consists of his behavior, cognition, emotional abilities, and interaction with his surroundings. The personality of an individual is modified by his ability for social perception, life experiences, and training. The pattern of study in which a person acquires education has a great influence on their personality. Objective To compare the personality traits and academic performance of boarders and non-boarders studying in a medical university. Material and methods It is a comparative, descriptive cross-sectional study done at Rawalpindi Medical University, Pakistan. The duration of the study was from January 2019 to April 2019. A questionnaire was randomly distributed among the students of Rawalpindi Medical University and filled under supervision. The questionnaire had two parts: (1) Academic performance information and (2) Big Five inventory (BFI-40). Only MBBS students of Rawalpindi Medical University were included. For statistical analysis, the independent t-test was applied using the Windows IBM Statistical Package for the Social Sciences Version 22 (SPSS, IBM Corp., Armonk, NY, US). The statistically significant value was taken as 0.05. Results Out of 300 questionnaires distributed, 287 were properly filled, giving a response rate of 95.6%. The Cronbach's alpha value was .750. The mean age was 20.87±1.344. There were 216 (75.1%) male and 71 (24.9%) females. One-hundred eighty-three (63.8%) were boarders and 104 (36.2%) were non-boarders. The mean scores of extraversion, agreeableness, and conscientiousness were higher for boarders while the mean scores of neuroticism and openness were higher for non-boarders. High average percentages in professional exams were common in non-boarders while boarders were taking more supplementary exams comparatively. Conclusion Self-discipline, surgency from external activities/situations, and getting along with others are common traits among boarders. On the other hand, non-boarders are more creative but emotionally unstable. The academic status of boarders is comparatively poor. Thus, the hostel administration should be particularly concerned about the activities of boarders, and parents should be aware of their child's academic status. Teachers should pay special attention to the character development of students.