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Abd Rahman MR, Hassan Z, Hassan MS, Hashim R, Wong LS, Leong WY, Syd Jaafar SH, Salvamani S. Enhanced Goat Milk MUFA Quality via Date Pit Supplementation: A Time-Based Pattern Recognition Analysis Utilizing Agricultural Waste Byproduct. Int J Food Sci 2023; 2023:1797017. [PMID: 37350796 PMCID: PMC10284659 DOI: 10.1155/2023/1797017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 05/10/2023] [Accepted: 05/11/2023] [Indexed: 06/24/2023]
Abstract
Date pits are agricultural waste byproducts and are available in tons yearly. Milk MUFAs are lipids beneficial for health and sorted out for food product development. This work is aimed at researching the effect of supplementing dairy goats with date pit powder (DPP) as a source of fatty acids (FA), an alternative to enhancing the unsaturated FA in milk and analysed via chemometrics in a 3-month supplementation-based study. Saanen-Boer crossed dairy goats were divided into six groups comprising of control, 10 g and 20 g both for Ajwa DPP (high-quality dates) and Mariami DPP (agricultural waste byproduct), and another 30 g for Mariami DPP only. The supplementation exercise was done daily on each dairy goat. The DPP and milk samples were analysed for its FA profile applying GC-FID and followed by chemometric techniques, namely, PCA and PLS. Results indicated that the n-6/n-3 ratio was the highest for the unsupplemented group compared to the DPP-treated goats with lower n-6/n-3 ratios. The M30 group showcased the most promising health-related class of FAs viewed by 3D PCA and PLS model clustering patterns, in particular monounsaturated FA (MUFA) (C18:1n9c or oleic acid). These results suggest that Mariami DPP supplementation at higher doses and time to lactating Saanen-Boer cross goats can be a means to milk FA quantity and quality enhancement and that chemometrics via pattern recognition can be useful statistical tools when dealing with overwhelming data.
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Affiliation(s)
- M. R. Abd Rahman
- Faculty of Health and Life Sciences, INTI International University, Persiaran Perdana Bandar Baru Nilai, Putra Nilai, 71800 Nilai, N. Sembilan, Malaysia
- Department of Food Biotechnology, Faculty of Science and Technology, Universiti Sains Islam Malaysia, Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia
| | - Z. Hassan
- Department of Food Biotechnology, Faculty of Science and Technology, Universiti Sains Islam Malaysia, Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia
| | - M. S. Hassan
- Department of Industrial Chemistry, Faculty of Science and Technology, Universiti Sains Islam Malaysia, Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia
| | - R. Hashim
- Department of Food Biotechnology, Faculty of Science and Technology, Universiti Sains Islam Malaysia, Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia
| | - L. S. Wong
- Faculty of Health and Life Sciences, INTI International University, Persiaran Perdana Bandar Baru Nilai, Putra Nilai, 71800 Nilai, N. Sembilan, Malaysia
| | - W. Y. Leong
- Faculty of Health and Life Sciences, INTI International University, Persiaran Perdana Bandar Baru Nilai, Putra Nilai, 71800 Nilai, N. Sembilan, Malaysia
| | - S. H. Syd Jaafar
- Department of Food Biotechnology, Faculty of Science and Technology, Universiti Sains Islam Malaysia, Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia
| | - S. Salvamani
- School of Health Sciences, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
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Gadour E, Hassan Z. ENDOSCOPIC ULTRASOUND-GUIDED BILIARY DRAINAGE VERSUS PERCUTANEOUS TRANSHEPATIC CHOLANGIGRAPHY, SYSTEMATIC REVIEW. ESGE Days 2022 2022. [DOI: 10.1055/s-0042-1745200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2023]
Affiliation(s)
- E. Gadour
- University Hospitals of Morecambe Bay NHS Foundation Trust, Gastroenterology, Lancaster, United Kingdom
| | - Z. Hassan
- Stockport Hospitals NHS Foundation Trust, Medicine, Manchester, United Kingdom
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Abbas SR, Khan RT, Shafique S, Mumtaz S, Khan AA, Khan AM, Hassan Z, Hussain SA, Abbas S, Abbas MR, Batool A, Safder MA. Study of resveratrol against bone loss by using in-silico and in-vitro methods. BRAZ J BIOL 2021; 83:e248024. [PMID: 34932613 DOI: 10.1590/1519-6984.248024] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 05/29/2021] [Indexed: 11/22/2022] Open
Abstract
By applying the in-silico method, resveratrol was docked on those proteins which are responsible for bone loss. The Molecular docking data between the resveratrol and Receptor activator of nuclear factor-kappa-Β ligand [RANKL] receptors proved that resveratrol binds tightly to the receptors, showed the highest binding affinities of -6.9, -7.6, -7.1, -6.9, -6.7, and -7.1 kcal/mol. According to in-vitro data, Resveratrol reduced the osteoclasts after treating Marrow-Derived Macrophages [BMM] with Macrophage colony-stimulating factor [MCSF] 20ng / ml and RANKL 50ng / ml, with different concentrations of resveratrol (2.5, 10 μg / ml) For 7 days, the cells were treated with MCSF (20 ng / ml) and RANKL (40 ng / ml) together with concentrated trimethyl ether and resveratrol (2.5, 10 μg / ml) within 12 hours. Which, not affect cell survival. After fixing osteoclast cells with formaldehyde fixative on glass coverslip followed by incubation with 0.1% Triton X-100 in PBS for 5 min and after that stain with rhodamine phalloidin staining for actin and Hoechst for nuclei. Fluorescence microscopy was performed to see the distribution of filaments actin [F.actin]. Finally, resveratrol reduced the actin ring formation. Resveratrol is the best bioactive compound for drug preparation against bone loss.
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Affiliation(s)
- S R Abbas
- Karakoram International University, Department of Biological Sciences, Gilgit, Pakistan
| | - R T Khan
- University of Azad Jammu and Kashmir, Department of Botany, Azad Jammu and Kashmir, Pakistan
| | - S Shafique
- University of Poonch, Department of Plant Breeding and Molecular Genetics, Rawalakot, Azad Jammu and Kashmir, Pakistan
| | - S Mumtaz
- Karakoram International University, Department of Biological Sciences, Gilgit, Pakistan
| | - A A Khan
- Bahauddin Zakariya University, College of Agriculture Bahadur Campus, Layyah, Pakistan
| | - A M Khan
- University of Sargodha, Department of Biotechnology, Sargodha, Pakistan
| | - Z Hassan
- Bahauddin Zakariya University, College of Agriculture Bahadur Campus, Layyah, Pakistan
| | - S A Hussain
- Karakoram International University, Department of Biological Sciences, Gilgit, Pakistan
| | - S Abbas
- Karakoram International University, Department of Biological Sciences, Gilgit, Pakistan
| | - M R Abbas
- University of Azad Jammu and Kashmir, Department of Computer Sciences and IT, Muzaffarabad, Pakistan
| | - A Batool
- Virtual University Lahore, Department of Biotechnology, Lahore, Pakistan
| | - M A Safder
- Karakoram International University, Department of Biological Sciences, Gilgit, Pakistan
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Rajamanickam S, Mohammad SM, Hassan Z, Omar AF, Muhammad A. Investigations into Ag nanoparticles–carbon–poly(9,9-di-n-octylfluorenyl-2,7-diyl) (PFO) composite: morphological, structural, optical, and electrical characterization. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-021-03938-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Fatima K, Abbas SR, Zia M, Sabir SM, Khan RT, Khan AA, Hassan Z, Zaman R. Induction of secondary metabolites on nanoparticles stress in callus culture of Artemisia annua L. BRAZ J BIOL 2021; 81:474-483. [PMID: 33053134 DOI: 10.1590/1519-6984.232937] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 04/02/2020] [Indexed: 12/17/2022] Open
Abstract
Nanoparticles are known bio elicitors in plant biotechnology. Different concentrations of ZnO, CuO and CoO nanoparticles were used for the enhanced accumulation of secondary metabolites and antioxidant activities in the callus derived from root, shoot and leaf of Artemisia annua L. Biomass of callus was somehow affected on high concentrations of Nps. Phenolic content was observed maximum (60µg) in shoot callus at 0.1mg/l of CuONps. Total antioxidant activity was observed maximum (33µg) in root callus at 0.1mg/l of ZnOnps. Total reducing power maximum (33µg) was observed in root callus at concentration of 0.05 mg/l of CoONps. Maximum radical scavenging activity was observed in shoot callus at 0.05mg/l of ZnONps. Rutin gallic acid and caffic acid were also determined in most of the samples by HPLC. The study concludes that different Nps have positive effect on the induction of secondary metabolites in A.annua plant.
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Affiliation(s)
- K Fatima
- Department of Biotechnology, Quaid-e-Azam University Isalmabad, Pakistan
| | - S R Abbas
- Department of Biological Sciences, Hunza Campus, Karakorum International University Gilgit, Pakistan
| | - M Zia
- Department of Biotechnology, Quaid-e-Azam University Isalmabad, Pakistan
| | - S M Sabir
- Department of Chemistry, University of Poonch, Rawalakot, Pakistan
| | - R T Khan
- Department of Botany, University of Azad Jammu and Kashmir, Pakistan
| | - A A Khan
- College of Agriculture, Bahauddin Zakariya University, Bahadur Sub Campus Layyah, Pakistan
| | - Z Hassan
- College of Agriculture, Bahauddin Zakariya University, Bahadur Sub Campus Layyah, Pakistan
| | - R Zaman
- Department of Biochemistry, University of Haripur, Pakistan
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Latief M, Shafi O, Hassan Z, Abbas F. FAVIPIRAVIR AND DEXAMETHASONE IN MANAGEMENT OF SARS-COV2 INFECTION. IJMMR 2021. [DOI: 10.11603/ijmmr.2413-6077.2020.2.11485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background. The clinical presentation of Coronavirus disease 19 (COVID-19) varies from mild symptoms to severe illness including multiorgan dysfunction. Favipiravir is an antiviral agent which has been previously used for treatment of influenza and was recently approved for treatment of mild to moderate COVID-19 in India.
Objective. The Objective of this study was to assess the role of Favipiravir and Dexamethasone in patients with COVID-19.
Methods. A total of 17 patients were included in this observational study. The included patients were RT-PCR for SARS-Cov-2 positive with increased inflammatory markers. All patients received Antiviral therapy, Anticoagulation (Enoxaparin 0.4mg subcutaneous twice daily), Steroids (Dexamethasone 8mg daily for 5days and 4mg daily for 5 days). Viral clearance (time to RT-PCR negative), time to defervescence after antiviral therapy, time to become independent of Oxygen support was studied.
Results. Fever, myalgias, dry cough and dyspnea were the commonest presentation of COVID-19. All of our patients had lymphopenia. In our study 11 (64.7%) patients had bilateral ground glass opacities on CT chest while 6 had consolidation in addition to ground glass opacities. In two patients, who required non-invasive ventilation, Favipiravir was stopped and these patients received Remdesivir for a total of 5 days. In patients who received Favipiravir only, the Median time to RT-PCR negative, defervescence and oxygen independence was 8,3 and 6 days respectively.
Conclusion. Our observational study demonstrated improvement in the majority of patients with COVID-19 with use of Favipiravir. Additional studies are needed to compare the efficiency of Favipiravir with Remdesivir.
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Mahmood A, Lani M, Hassan Z, Razak S, Ahmad F. Antioxidant and antimicrobial properties of Indo-Malayan stingless bee (Heterotrigona itama) honey from different seasons and distribution of flowers. Food Res 2021. [DOI: 10.26656/fr.2017.5(2).546] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The quality of honey produced by stingless bees can be affected by a variety of factors.
Different seasons may have an influence on stingless bee behaviour while different flower
sources may affect the properties of stingless bee honey. Thus, this study aimed to
determine the antioxidant and antimicrobial properties of stingless bee honey from
different multifloral sources collected during dry and rainy seasons. Honey was collected
from hives placed in two different areas with multifloral (area A and B). The difference
between these areas was area A only planted with two types of flowers (with stevia) and
area B with more than two flowers. Pollen in the honey samples was identified to confirm
the seasonal variations. The antioxidative potential of the honey samples was determined
using total phenolic content (TPC), DPPH and FRAP assays and total carotenoid content
(TCC). Antimicrobial properties were analysed using well diffusion method (mm) against
the foodborne pathogens Escherichia coli, Staphylococcus aureus, Listeria
monocytogenes and Salmonella enterica serovar Typhimurium. The results revealed that
honey harvested during the dry season showed higher antioxidant properties compared to
those harvested in the rainy season. The highest antioxidant activities were measured in
honey samples taken from area B. Nevertheless, honey harvested in both seasons showed
antimicrobial properties against all tested food pathogens, with the dry season samples
showing the highest inhibition. Surprisingly, only honey from area A present showed no
antimicrobial effect against E. coli. This study showed that the antioxidant and
antimicrobial properties of multifloral stingless bee honey are strongly affected by
seasonal differences and the distribution of the flowering plant
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Chia TY, Murugaiyah V, Khan NA, Sattar MA, Abdulla MH, Johns EJ, Ahmad A, Hassan Z, Kaur G, Mei HY, Ahmad FU, Akhtar S. Inhibition of L-NAME-induced hypertension by combined treatment with apocynin and catalase: the role of Nox 4 expression. Physiol Res 2021; 70:13-26. [PMID: 33728924 DOI: 10.33549/physiolres.934497] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Reactive oxygen species (ROS) such as superoxide (O2-) generated by NAD(P)H oxidases have emerged as important molecules in blood pressure regulation. This study investigated the effect of apocynin and catalase on blood pressure and renal haemodynamic and excretory function in an L-NAME induced hypertension model. Forty Male Wistar-Kyoto (WKY) rats (n=8 per group) were treated with either: vehicle (WKY-C); L-NAME (WKY-L, 15 mg/kg/day in drinking fluid); WKY-L given apocynin to block NAD(P)H oxidase (WKY-LApo, 73 mg/kg/day in drinking water.); WKY-L given catalase to enhance ROS scavenging (WKY-LCat, 10000 U/kg/day i.p.); and WKY-L receiving apocynin plus catalase (WKY-LApoCat) daily for 14 days. L-NAME elevated systolic blood pressure (SBP), 116+/-1 to 181±4 mmHg, reduced creatinine clearance, 1.69+/-0.26 to 0.97+/-0.05 ml/min/kg and fractional sodium excretion, 0.84+/-0.09 to 0.55+/-0.09 % at day 14. Concomitantly, plasma malondialdehyde (MDA) increased six fold, while plasma total superoxide dismutase (T-SOD), plasma nitric oxide (NO) and plasma total antioxidant capacity (T-AOC) were decreased by 60-70 % and Nox 4 mRNA expression was increased 2-fold. Treatment with apocynin and catalase attenuated the increase in SBP and improved renal function, enhanced antioxidative stress capacity and reduced the magnitude of Nox4 mRNAs expression in the L-NAME treated rats. This study demonstrated that apocynin and catalase offset the development of L-NAME induced hypertension, renal dysfunction and reduced oxidative stress status, possibly contributed by a reduction in Nox4 expression during NOS inhibition. These findings would suggest that antioxidant compounds such as apocynin and catalase have potential in treating cardiovascular diseases.
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Affiliation(s)
- T Y Chia
- Cardiovascular and Renal Physiology Research Laboratory, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia. or . Department of Pharmacology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, Minden, Penang, Malaysia.
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Abd HR, Hassan Z, Ahmed NM, Omar A, Thahab S, Lau KS. Rapid synthesis of Ce3+:YAG via CO2 laser irradiation combustion method: Influence of Ce doping and thickness of phosphor ceramic on the performance of a white LED device. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2020.121866] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Abstract
Case report A 76-year-old Caucasian woman with a history of previous BCCs excised from the head and legs was referred from the dermatology team with a biopsy proven superficial BCC to the left palm. The patient had presented to the dermatology team with the same lesion 7 years prior to the definitive diagnosis. The lesion was described as 27 × 15 mm scaly, poorly-defined, plaque-like lesion to the central palm. There was no ulceration or visible telangiectasia. At the time, an initial diagnosis of psoriasis was given and she received several courses of topical treatments to no avail. Eventually, a biopsy was taken which revealed a multifocal superficial BCC. After unsuccessful attempts at treating with topical Imiquimod, the lesion was surgically excised and resurfaced with a full thickness skin graft. Discussion The current understanding that BCCs derive from cells of the hair follicle cannot explain their appearance on the palm. Alternative hypotheses have been proposed as to their actual origin which would account for this rare occurrence. Ultimately, histology can determine the nature of the lesion. We urge clinicians encountering atypical, non-healing lesions to glabrous skin to keep in mind a diagnosis of skin cancer as a delayed diagnosis can lead to increased morbidity.
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Affiliation(s)
- S. Ramadan
- Mersey Regional Plastic Surgery and Burns Service, Whiston Hospital, Liverpool, UK
- Corresponding author.
| | - N. Sharma
- Department of Dermatopathology, Whiston Hospital, Liverpool, UK
| | - Z. Hassan
- Mersey Regional Plastic Surgery and Burns Service, Whiston Hospital, Liverpool, UK
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Magaji FA, Okolo MO, Hassan Z, Shambe IH, Pam VC, Ocheke AN, Yiltok ES, Golit W, Anzaku SA, Daloek M, Ogwuche J, Imade GE, Isichie C, Mutihir JT, Oguche S, Agbaji O, Musa J, Sagay SA, Zoakah AI, Cohn SE. Prevalence of hepatitis B virus infection among pregnant women in Jos, Nigeria. Ann Afr Med 2020; 19:176-181. [PMID: 32820729 PMCID: PMC7694709 DOI: 10.4103/aam.aam_20_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Objectives: The study sought to determine the prevalence and risk factors associated with Hepatitis B surface antigenemia (HBsAg) positivity among pregnant women in Jos, Nigeria. Methodology: This was a cross-sectional study carried out among the pregnant population in five healthcare facilities in Jos, between November 1, 2017 and April 30, 2018. Informed consent was obtained, and data on sociodemographic and risk factors for hepatitis B virus (HBV) infection were collected. Hepatitis B viral infection was assessed using the in vitro HBsAg diagnostic rapid kit (Acon Laboratories, USA). Descriptive statistics, Chi-square test, and logistic regression were performed to identify predictors of HBV infection in the study population. All statistical analyses were carried out on STATA version 15. Results: Of the 3,238 women enrolled, 7.4% (241/3238) (95% confidence interval [CI] = 6.6% to 8.4%) were HBsAg positive. The absence of HBV vaccination (adjusted odds ratio [AOR] = 2.49; 95% CI = 1.49–4.09; P < 0.001), co-infection with HIV (AOR = 1.90; 95% CI = 1.18–3.08; P = 0.009), and higher parity (AOR = 1.37; 95% CI = 1.04–1.79; P = 0.024) were independently associated with HBV infection in pregnancy. Conclusions: The prevalence of HBV infection among pregnant women was high, especially among those without prior vaccination for HBV, those with HIV co-infection and higher parity.
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Affiliation(s)
- Francis Ajang Magaji
- Jos University Teaching Hospital; Department of Obstetrics and Gynecology, University of Jos, Jos, Nigeria
| | - Mark Ojogba Okolo
- Jos University Teaching Hospital; Department of Medical Microbiology, University of Jos, Jos, Nigeria
| | - Z Hassan
- Jos University Teaching Hospital; Department of Community Medicine, University of Jos, Jos, Nigeria
| | - Iornum H Shambe
- Jos University Teaching Hospital; Department of Obstetrics and Gynecology, University of Jos, Jos, Nigeria
| | - Victor Chung Pam
- Jos University Teaching Hospital; Department of Obstetrics and Gynecology, University of Jos, Jos, Nigeria
| | - Amaka Ngozi Ocheke
- Jos University Teaching Hospital; Department of Obstetrics and Gynecology, University of Jos, Jos, Nigeria
| | - Esther S Yiltok
- Jos University Teaching Hospital; Department of Pediatrics, University of Jos, Jos, Nigeria
| | - Williams Golit
- Jos University Teaching Hospital; Department of Obstetrics and Gynecology, Plateau State Specialist Hospital, Jos, Nigeria
| | - Stephen Ajen Anzaku
- Department of Obstetrics and Gynecology, Bingham University Teaching Hospital, Jos, Nigeria
| | - Martins Daloek
- Department of Obstetrics and Gynecology, Our Lady of Apostles Hospital, Jos, Nigeria
| | - Jerry Ogwuche
- Department of Obstetrics and Gynecology, Our Lady of Apostles Hospital, Jos, Nigeria
| | - Godwin E Imade
- Department of Obstetrics and Gynecology, University of Jos, Jos, Nigeria
| | - Christain Isichie
- Jos University Teaching Hospital; Maternal and Child Health Unit, Faith Alive Foundation Hospital, Jos, Nigeria
| | - Jsiah T Mutihir
- Jos University Teaching Hospital; Department of Obstetrics and Gynecology, University of Jos, Jos, Nigeria
| | - Stephen Oguche
- Jos University Teaching Hospital; Department of Pediatrics, University of Jos, Jos, Nigeria
| | - Oche Agbaji
- Jos University Teaching Hospital; Department of Internal Medicine, University of Jos, Jos, Nigeria
| | - Jonah Musa
- Jos University Teaching Hospital; Department of Obstetrics and Gynecology, University of Jos, Jos, Nigeria
| | - Solomon Ateine Sagay
- Jos University Teaching Hospital; Department of Obstetrics and Gynecology, University of Jos, Jos, Nigeria
| | - A I Zoakah
- Jos University Teaching Hospital; Department of Community Medicine, University of Jos, Jos, Nigeria
| | - Susan E Cohn
- Division of Infectious Diseases, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
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Kakakhel M, Wu F, Khan T, Feng H, Hassan Z, Anwar Z, Faisal S, Ali I, Wang W. The first two months epidimiological study of COVID-19, related public health preparedness, and response to the ongoing epidemic in Pakistan. New Microbes New Infect 2020; 37:100734. [PMID: 32884821 PMCID: PMC7452264 DOI: 10.1016/j.nmni.2020.100734] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/02/2020] [Accepted: 07/17/2020] [Indexed: 02/07/2023] Open
Abstract
As an underdeveloped country, the coronavirus disease 2019 (COVID-19) epidemic has posed a major risk to the health and economy of Pakistan. The SIR (susceptible-infected-recovered) model of epidemiologic analysis predicts that there should have been more cases since late March 2020 in Pakistan. We therefore sought to investigate COVID-19's prevalence and epidemiologic trends in Pakistan. Research for COVID-19 is still in its early stages, so data were collected from official websites and research journals, then analyzed for the disease's prevalence, epidemiology, mortality and recoveries. The results indicated that a rapid increase had indeed occurred in the number of COVID-19 infections in Pakistan, with the first case reported on 25 February, 2020. From 25 February 25 to April, 2020, COVID-19 infected 11,155 people in Pakistan, with 237 deaths (2.12%) and 2527 recoveries (19.96%). We found a statistically significant positive correlation between the prevalence of COVID-19 and the mortality ratio (r = 0.983, r 2 = 0.966; p ≤ 0.05). We concluded that proper management must be undertaken to improve the quarantine system, and the World Health Organization guidelines must be closely followed to cope with COVID-19. There is no vaccine for COVID-19, so antiviral drugs (interferon alfa, ribavirin) may be useful to prevent COVID-19; however, severe control measures implemented in China have significantly mitigated the spread of COVID-19. Suspected and confirmed cases must be treated in separate rooms. Staying home and social distancing are the safe way to proceed.
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Affiliation(s)
- M.A. Kakakhel
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, PR China
| | - F. Wu
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, PR China
- National Research Center for Conservation of Ancient Wall Paintings and Earthen Sites, Conservation Institute, Dunhuang Academy, Dunhuang, Gansu, 736200, PR China
- Key Scientific Research Base of Conservation for Ancient Mural, State Administration for Cultural Heritage, Dunhuang, 736200, Gansu, PR China
| | - T.A. Khan
- Department of Microbiology, Kohat University of Science and Technology, Kohat, KPK, Pakistan
| | - H. Feng
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, PR China
| | - Z. Hassan
- Institutes and Key Laboratories, Chemistry Department, Tsinghua University, Beijing, 100084, PR China
| | - Z. Anwar
- School of Life Sciences, Key Laboratory of Aquatic Animal Resources and Utilization of Jiangxi, Nanchang University, Jiangxi, 330031, PR China
| | - S. Faisal
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, PR China
| | - I. Ali
- College of Life Science, Northwest University, Xi'an, 710069, Shaanxi, PR China
| | - W. Wang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, PR China
- National Research Center for Conservation of Ancient Wall Paintings and Earthen Sites, Conservation Institute, Dunhuang Academy, Dunhuang, Gansu, 736200, PR China
- Key Scientific Research Base of Conservation for Ancient Mural, State Administration for Cultural Heritage, Dunhuang, 736200, Gansu, PR China
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Akhter N, Siraj MM, Habib SA, Debnath RC, Hassan Z, Islam K, Fatema N, Wahiduzzaman M, Khondokar NN, Kadir AM, Nahar J, Haque F, Islam R, Rahman F. Fetomaternal Outcome of Pregnancy in Women with Tetralogy of Fallot. Mymensingh Med J 2020; 29:628-632. [PMID: 32844804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This prospective study was done to determine fetomaternal outcomes of pregnancy in women with Tetralogy of Fallot (TOF) and carried out in two centres especially in the care of patients with adult congenital heart disease (CHD) from January 2005 to December 2009. Clinical, haemodynamic and obstetric data were reviewed for pregnant women with TOF. Ten (10) pregnant women were identified in the age range 18 to 47 years. Most of the patients were in the age group of 18 to 27 years, 34 to 36 weeks gestational age (in week) and primi gravida (60%). Right-sided aortic arch (20%) and major anomalies of pulmonary collaterals (30%) were common anomalies anatomical association. Normal vaginal delivery was the mode of delivery (70%) in the majority of the patients. Spontaneous abortions were occurred in 3(30%) patients. Primary maternal cardiac events complicating pregnancies were congestive heart failure (20%), arrhythmias and cardiovascular events (10%). Premature labor (40%) was the most common obstetric complication. Premature birth (40%), fetal demise (20%), neonatal death (10%) and cardiac anomaly at birth (10%) were the offspring complications in the study. Women with TOF can go through pregnancy with a low risk to themselves with frequent treatable complications, but there is a high incidence of miscarriage, premature births and low birth weight. An incidence of congenital anomaly in the fetus is higher than that found in the normal population.
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Affiliation(s)
- N Akhter
- Dr Nargis Akhter, Associate Professor, Department of Gynae and Obstetrics, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh
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Wan-Hamat H, Lani MN, Hamzah Y, Alias R, Hassan Z, Mahat NA. Survival of antibiotic resistant Escherichia coli in vacuumpacked keropok lekor: Food safety alert among SME keropok lekor producers. Trop Biomed 2020; 37:103-115. [PMID: 33612722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The microbiological quality of thirty ready-to-eat (RTE) keropok lekor (a sausage shape Malaysian fish product) was evaluated in comparison to microbiological guidelines for ready to eat foods. The two E. coli isolates were subjected to DNA sequencing, identified and tested for their resistance towards fifteen different antibiotics. The survival and growth of the isolated E. coli strains inoculated in keropok lekor at atmospheric air and vacuum packaging were also evaluated. Results revealed that four samples (13.33%) contained Enterobacteriaceae counts that exceeded the recommended allowable counts of 4.0 log10 CFU/g. Unsatisfactory level of coliforms (< 1.7 log10 CFU/g) was also observed in ten of the samples; two of which contained E. coli (2.1 ± 0.17 and 3.7 ± 0.02 log10 CFU/g), suggesting of poor hygiene and sanitation practices. While the 'Possible E10' E. coli strain was observably resistant towards Nalidixic acid (30µg) alone, B10 E. coli isolate was worryingly resistant towards Ampicillin (10µg), Ceftazidime (30µg), Ciprofloxacin (5µg), Ceftriaxone (30µg), Nalidixic acid (30µg) and Tetracycline (30µg). This study also revealed that the growth and survival of the 'Possible E10' and B10 E. coli strains were not significantly affected by vacuum packaging when stored at both 4°C and 28°C. Therefore, intervention programmes to alert and educate smallmedium enterprisers (SMEs) of keropok lekor producers on food safety as well as potential health risks that can be associated due to inappropriate handling procedures of such product, merits consideration.
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Affiliation(s)
- H Wan-Hamat
- Food Safety and Quality Laboratory, Terengganu Health State Department, Kg. Bukit Tunggal, 21200 Kuala Terengganu, Terengganu, Malaysia
- Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - M N Lani
- Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Y Hamzah
- Faculty of Fisheries and Food Science, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - R Alias
- Institute of Halal International, Universiti Selangor, Jalan Zirkon A 7/A, Seksyen 7, 40000 Shah Alam, Selangor, Malaysia
| | - Z Hassan
- Faculty of Science and Technology, Universiti Sains Islam Malaysia, Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia
| | - N A Mahat
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
- Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
- Enzyme Technology and Green Synthesis Group, Universiti Teknologi Malaysia, 81310 Johor Bahru, Malaysia
- Centre of Research for Fiqh Forensics and Judiciary (CFORSJ), Islamic Science Institute, Universiti Sains Islam Malaysia, Bandar Baru Nilai, 71800 Nilai, Negeri Sembilan, Malaysia
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Tahir HM, Pervez N, Nadeem J, Khan AA, Hassan Z. Esculent coating of spider silk enhanced the preservation and shelf life of apricot. BRAZ J BIOL 2020; 80:115-121. [DOI: 10.1590/1519-6984.193974] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Accepted: 06/18/2018] [Indexed: 11/22/2022] Open
Abstract
Abstract According to the Food and Agriculture Organization (FAO), roughly one-third of the total food produced is lost globally. The major cause of this wastage is the perishability of fruits and vegetables. Therefore, researchers have endeavored to develop an effective preservation technique. Our study explored the potential application of spider silk as an odourless and edible preservative coating for fruits. The spider silk was collected from spiders reared in the laboratory, following by degumming and dissolution to formulate the silk solution. For this study, apricots were selected as the model fruit. The apricots were dip coated with the formulated silk solution and allowed to dry. In order to enhance the beta sheet content of the silk coating, the fruits were exposed to water annealing for varying intervals of time under vacuum condition. The effect of silk coating and water annealing time period on preservation of fruits was then evaluated morphologically and gravimetrically. The results showed that the fruits, which were used as control, exhibited a greater degree of water loss and suffered from fungal attack. In contrast, the silk coated fruits showed less water loss and were protected from fungal attack. Therefore, the study provides compelling evidence regarding the application of spider silk as a preservative coating.
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Affiliation(s)
| | - N. Pervez
- Government College University, Pakistan
| | - J. Nadeem
- Government College University, Pakistan
| | | | - Z. Hassan
- Bahauddin Zakariya University, Pakistan
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Abd-Alghafour NM, Ahmed NM, Hassan Z. Challenges in Nanobiosensor Aiming Bioscience Applications. Nanotechnology in the Life Sciences 2020:187-195. [DOI: 10.1007/978-3-030-39246-8_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Hayat S, Hassan Z, Changazi SH, Zahra A, Noman M, Zain Ul Abdin M, Javed H, Ans AH. Comparative analysis of serum lipid profiles in patients with and without gallstones: A prospective cross-sectional study. Ann Med Surg (Lond) 2019; 42:11-13. [PMID: 31065353 PMCID: PMC6495089 DOI: 10.1016/j.amsu.2019.04.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/29/2019] [Accepted: 04/21/2019] [Indexed: 01/20/2023] Open
Abstract
Objectives Gallbladder disease is one of the most common diseases of the gastrointestinal tract. Various studies have shown an association between gallstones and an alteration in the serum lipids. The objective of this study was to compare serum lipid profile of gallstone patients with the controls. Methods This prospective cross-sectional study was conducted in the Surgical Department of the Services Institute of Medical Sciences from August 2017 to August 2018. A total of 50 patients were included in the study after screening through the inclusion criteria. A control group of 50 inpatients with no personal or family history of gallstones were also recruited for comparison. Results were expressed as mean with standard deviation. Students t-test was used to compare the data between the patients and the control groups (p < 0.05 was considered statistically significant). SPSS software, version 20 was used for statistical analysis. Results The mean age of the patients was 40.90 years and that of controls was 34.74 years. 46 patients were females and 44 controls were females. The serum cholesterol levels were high in the patients as compared to the controls but the comparison was not statistically significant. Serum triglycerides levels were high in the patients as compared to the controls and the analysis was statistically significant. Furthermore, the serum HDL levels were low in the patients as compared to the controls with a statistically significant p-value. However, the serum LDL levels were low in the patients as compared to the control group. Conclusion It was concluded that serum triglyceride levels and serum HDL levels were statistically significant in gallstone patients and there was a positive correlation between these parameters and gallstone disease. Gallbladder disease is one of the most common diseases of the gastrointestinal tract in Pakistan. Various studies have shown an association between gallstones and an alteration in the serum lipids. This study was conducted to find out the association of dyslipidemias with formation of gallstones. Serum lipid profile of gallstones patient was compared with inpatient control group. It was concluded in study that serum triglyceride levels and serum HDL levels were statistically significant in gallstone patients and there was a positive correlation between these parameters and gallstone disease.
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Affiliation(s)
| | | | | | - Anam Zahra
- Services Institute of Medical Sciences Lahore, Pakistan
| | | | | | - Haris Javed
- Services Institute of Medical Sciences Lahore, Pakistan
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Alsultany FH, Majdi HS, Abd HR, Hassan Z, Ahmed NM. Catalytic Growth of 1D ZnO Nanoneedles on Glass Substrates Through Vapor Transport. Journal of Elec Materi 2019; 48:1660-1668. [DOI: 10.1007/s11664-018-06853-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 12/04/2018] [Indexed: 09/02/2023]
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Mohammad SM, Abd-Alghafour NM, Talib RA, Hassan Z, Ahmed NM, Abuelsamen AA, Afzal N. Influence of growth temperature and duration on different properties of ultra-long ZnO nanorods grown by modified chemical bath deposition method. Mater Res Express 2018; 5:095020. [DOI: 10.1088/2053-1591/aad76b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Almeer R, Alqarni A, Alqattan S, Abdi S, Alarifi S, Hassan Z, Semlali A. Effect of Honey in Improving Breast Cancer Treatment and Gene Expression Modulation of MMPs and TIMPs in Triple-Negative Breast Cancer Cells. PAK J ZOOL 2018. [DOI: 10.17582/journal.pjz/2018.50.6.1999.2007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abd-Alghafour N, Ahmed NM, Hassan Z, Almessiere MA. Hydrothermal Synthesis and Structural Properties of V 2O 5 Nanoflowers at Low Temperatures. J Phys : Conf Ser 2018; 1083:012036. [DOI: 10.1088/1742-6596/1083/1/012036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Alsultany FH, Hassan Z, Ahmed NM, Abd HR. Seed/Catalyst-Free Growth of ZnO Nanoleaves on ZnO Seed Layer/Glass by Thermal Evaporation Method. J Phys : Conf Ser 2018; 1083:012037. [DOI: 10.1088/1742-6596/1083/1/012037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Abd HR, Hassan Z, Ahmed NM, Almessiere MA, Omar AF, Alsultany FH, Sabah FA, Osman US. Effect of Annealing Time of YAG:Ce3+ Phosphor on White Light Chromaticity Values. Journal of Elec Materi 2018; 47:1638-1646. [DOI: 10.1007/s11664-017-5968-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Hassnain S, Hassan Z, Amjad S, Zulqarnain M, Arshad K, Zain Z. Needle stick injuries among nurses of two tertiary care hospitals of Lahore: A KAP study. J PAK MED ASSOC 2017; 67:1874-1878. [PMID: 29256533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To estimate the prevalence of needle-stick injuries in female nurses of a public and private hospital and compare the findings. METHODS This cross-sectional study was conducted at one public and one private tertiary care hospital in Lahore, Pakistan, from March to June 2015, and comprised female nurses who were selected using non-probability purposive sampling. A structured questionnaire was used to interview the subjects. Data analysis was done using SPSS 17. RESULTS Of the 386 participants, there were 193(50%) from each of the two hospitals. The prevalence of needle-stick injuries was found to be 85(44%) in public and 51(26.4%) in the private hospital. The highest proportion of injuries in both hospitals occurred while disposing or recapping needles, 36(42.4%) and 32(62.7 %) in public and private hospitals, respectively, especially in the morning shift, i.e. 42(49.4%) in public and 32(62.7%) in private hospital. Syringe needles were mostly involved, 51(60%) in public and 45(88.2%) in private hospital. CONCLUSIONS The prevalence of needle-stick injuries was higher in public hospital.
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Affiliation(s)
- Shamaila Hassnain
- Department of Community Health Sciences, Fatima Memorial College of Medicine & Dentistry, Lahore
| | - Zarbakht Hassan
- Final Year M.B,B.S. Students, Fatima Memorial College of Medicine & Dentistry, Lahore
| | - Sehar Amjad
- Final Year M.B,B.S. Students, Fatima Memorial College of Medicine & Dentistry, Lahore
| | - Muhammad Zulqarnain
- Final Year M.B,B.S. Students, Fatima Memorial College of Medicine & Dentistry, Lahore
| | - Khurram Arshad
- Final Year M.B,B.S. Students, Fatima Memorial College of Medicine & Dentistry, Lahore
| | - Zunaira Zain
- Final Year M.B,B.S. Students, Fatima Memorial College of Medicine & Dentistry, Lahore
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Abstract
<p>The main objective of this work is to develop film and study the thermal characteristics of polysaccharides films at various concentration of carrageenan in the mixture by calculating activation energy of polysaccharides films. There were four (4) film samples of two polysaccharides combination; arabic gum (AG) and carrageenan (C) with different formulations; sample A, sample B, sample C and sample D prepared. Sample A film is the control sample that contained only arabic gum and distilled water (DI) with 40% weight arabic gum per volume DI water (w/v%). Meanwhile for sample B and C were prepared with concentration 40 w/v% of Arabic gum and two differents of carrageenan concentrations; 1 w/v% and 10 w/v% respectively. Polyethylene glycol 400 (PEG 400) as a plasticiser was added into sample D film. The sample films were thermally characterized using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) under nitrogen atmosphere. The major thermal transitions as well as, activation energies of the major decomposition stages were determined. Sample A and B films exhibited the highest (112.43 kJ/mol) and the lowest (102.89 kJ/mol) activation energy of thermal decomposition, respectively. The activation energies were lower at larger amounts of sulfate groups from carrageenan on the degradation reactions. The DSC trend for all samples shows two (2) major intense peaks recorded in the DSC thermograms; an endothermic transition at temperature around 100<sup>°</sup>C and followed by an exothermic transition at temperature around 300<sup>°</sup>C. The endothermic transition is due to the heat absorption for dehydration of water, H2O and the decomposition of samples process. Meanwhile, the exothermic transition is caused by the formation of H<sub>2</sub>O, CO and CH<sub>4</sub> in polysaccharide film from dehydration, depolymerisation and decomposition at the high-temperature stages.</p><p>Chemical Engineering Research Bulletin 19(2017) 80-86</p>
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Abstract
Amelogenesis imperfecta (AI) is a heterogeneous group of inherited dental enamel defects. It has rarely been reported in association with multiorgan syndromes and metabolic disorders. The metabolic disorders that have been reported in association with AI include hypocalciuria, impaired urinary concentrating ability, and Bartter-like syndrome. In literature, only three cases of AI and distal renal tubular acidosis (dRTA) have been described: two cases in adults and a solitary case in the pediatric age group. Here, we report a child with AI presenting with dRTA; to the best of our knowledge, our reported case is the only second such case in pediatric age group. Our case highlights the importance of recognizing the possibility of renal abnormalities in patients with AI as it will affect the long-term prognosis.
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Affiliation(s)
- R A Misgar
- Department of Endocrinology, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - Z Hassan
- Department of Endocrinology, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - A I Wani
- Department of Endocrinology, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
| | - M I Bashir
- Department of Endocrinology, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, Jammu and Kashmir, India
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Armstrong A, Hart-Pinto A, Sharma N, Hassan Z. Discrepancies between biopsy and formal excision histology of non-melanoma skin cancer. J Plast Reconstr Aesthet Surg 2016; 69:1714-1716. [PMID: 27777175 DOI: 10.1016/j.bjps.2016.09.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 09/20/2016] [Accepted: 09/26/2016] [Indexed: 11/17/2022]
Affiliation(s)
- A Armstrong
- Plastic Surgery Department, Queen Alexandra Hospital, Southwick Hill Road, Cosham, Portsmouth PO6 3LY, UK.
| | - A Hart-Pinto
- Plastic Surgery Department, Whiston Hospital, Warrington Road, Prescot, Merseyside L35 5DR, UK
| | - N Sharma
- Histopathology Department, Whiston Hospital, Warrington Road, Prescot, Merseyside L35 5DR, UK
| | - Z Hassan
- Plastic Surgery Department, Whiston Hospital, Warrington Road, Prescot, Merseyside L35 5DR, UK
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Abd-Alghafour N, Ahmed NM, Hassan Z. Fabrication and characterization of V2O5 nanorods based metal–semiconductor–metal photodetector. Sensors and Actuators A: Physical 2016; 250:250-257. [DOI: 10.1016/j.sna.2016.09.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Abd-Alghafour NM, Ahmed NM, Hassan Z, Bououdina M. High-performance p–n heterojunction photodetectors based on V2O5 nanorods by spray pyrolysis. Appl Phys A 2016; 122:817. [DOI: 10.1007/s00339-016-0346-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Mohammad SM, Hassan Z, Ahmed NM, Talib RA, Abd-Alghafour NM, Omar AF. Hydrothermal growth and characterization of vertically well-aligned and dense ZnO nanorods on glass and silicon using a simple optimizer system. AIP Conference Proceedings 2016. [DOI: 10.1063/1.4948850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Rahman MM, Bakker M, Patty CHL, Hassan Z, Röling WFM, Ahmed KM, van Breukelen BM. Reactive transport modeling of subsurface arsenic removal systems in rural Bangladesh. Sci Total Environ 2015; 537:277-293. [PMID: 26282762 DOI: 10.1016/j.scitotenv.2015.07.140] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 07/28/2015] [Accepted: 07/28/2015] [Indexed: 06/04/2023]
Abstract
Subsurface Arsenic Removal (SAR) is a technique for in-situ removal of arsenic from groundwater. Extracted groundwater is aerated and re-injected into an anoxic aquifer, where the oxygen in the injected water reacts with ferrous iron in the aquifer to form hydrous ferric oxide (HFO). Subsequent extraction of groundwater contains temporarily lower As concentrations, because As sorbs onto the HFO. Injection, storage, and extraction together is called a cycle. A reactive transport model (RTM) was developed in PHREEQC to determine the hydrogeochemical processes responsible for As (im)mobilization during experimental SAR operation performed in Bangladesh. Oxidation of Fe(II) and As(III) were modeled using kinetic-rate expressions. Cation exchange, precipitation of HFO, and surface complexation, were modeled as equilibrium processes. A best set of surface complexation reactions and corresponding equilibrium constants was adopted from previous studies to simulate all 20 cycles of a SAR experiment. The model gives a reasonable match with observed concentrations of different elements in the extracted water (e.g., the r(2) value of As was 0.59 or higher). As concentrations in the extracted water are governed by four major processes. First, As concentration decreases in response to the elevated pH of injection water and likewise increases when native neutral pH groundwater flows in. Second, the sorption capacity for As increases due to the gradual buildup of HFO. Third, As sorption is enhanced by preferential removal of As(V). Fourth, competitive sorption of Si limits the capacity of freshly precipitated HFO for As sorption. Transferability of the developed reactive transport model was demonstrated through successful application of the model, without further calibration, to two additional SAR sites in Bangladesh. This gives confidence that the model could be useful to assess potential SAR performance at locations in Bangladesh based on local hydrogeochemical conditions.
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Affiliation(s)
- M M Rahman
- Delft University of Technology, Faculty of Civil Engineering and Geosciences, Stevinweg 1, Delft, The Netherlands; University of Dhaka, Department of Geology, Dhaka 1000, Bangladesh; North South University, Department of Environmental Science and Management, Bashundhara, Dhaka 1229, Bangladesh.
| | - M Bakker
- Delft University of Technology, Faculty of Civil Engineering and Geosciences, Stevinweg 1, Delft, The Netherlands
| | - C H L Patty
- VU University Amsterdam, Department of Molecular Cell Physiology, De Boelelaan 1085, NL-1081 HV Amsterdam, The Netherlands
| | - Z Hassan
- VU University Amsterdam, Department of Molecular Cell Physiology, De Boelelaan 1085, NL-1081 HV Amsterdam, The Netherlands
| | - W F M Röling
- VU University Amsterdam, Department of Molecular Cell Physiology, De Boelelaan 1085, NL-1081 HV Amsterdam, The Netherlands
| | - K M Ahmed
- University of Dhaka, Department of Geology, Dhaka 1000, Bangladesh
| | - B M van Breukelen
- VU University Amsterdam, Department of Earth Sciences, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
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Abdullah Q, Yam F, Hassan Z, Bououdina M. Pt-decorated GaN nanowires with significant improvement in H 2 gas-sensing performance at room temperature. J Colloid Interface Sci 2015; 460:135-45. [DOI: 10.1016/j.jcis.2015.07.048] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 07/12/2015] [Accepted: 07/21/2015] [Indexed: 11/26/2022]
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Das M, Banik PC, Hassan Z, Khalequzzaman M, Ali L. Prevalence of Undiagnosed Metabolic Syndrome (MS) in Bangladesh: A Comparative Study of Different Recommendations. Int J Epidemiol 2015. [DOI: 10.1093/ije/dyv096.516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rehnuma B, Hassan Z, Ibrahim M, Ali L. Serum levels of high sensitivity C-Reactive protein and its association with lipidemic status in Bangladeshi healthy adults. J Pathol Nep 2014. [DOI: 10.3126/jpn.v4i8.11591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Background: Metabolic diseases are affecting human health all over the world. These chronic disease states are associated with high sensitive CRP. The present study aims to measure hsCRP and lipid levels in a group of healthy adults to work out the normal hsCRP levels and explore its relationship to lipidemic and anthropometric variables.Materials and Methods: A total of 149 adults, age 30-60 yrs, healthy subjects were recruited in this study. Vital statistics were taken along with measurement of blood glucose, triglyceride, total cholesterol, high density lipoprotein, low density lipoprotein and hsCRP levels. Data were analyzed using statistical Package for Social Program (SPSS) for Windows version 10.Results: Mean (±SD) hsCRP was 2.46±1.89 (mg/l) with a cut off value of 3mg/l. Of the total 149 subjects 102 (66.4%) and 47 (31.5%) subjects had hsCRP level below and above the cutoff respectively. Triglyceride was significantly higher (p=0.033) and HDL was lower in subjects with high hsCRP. Total cholesterol and LDL was almost similar in both groups. Binary logistic regression showed significant negative association between hsCRP and HDLc (p=0.029) and but the model excluding HDL-c showed significant positive association (p=0.03) with triglyceride.Conclusion: About one-third of healthy Bangladeshi adults may have chronic subclinical inflammation and thus may have a risk of cardiovascular disorders. More than one-third healthy Bangladeshi adults have one or more type of dyslipidemia and the subclinical chronic inflammation in healthy Bangladeshi adults has a positive association with their serum triglyceride and negative association with their HDL-cholesterol levels.DOI: http://dx.doi.org/10.3126/jpn.v4i8.11591 Journal of Pathology of Nepal; Vol.4,No. 8 (2014) 644-648
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Hauge-Evans AC, Reers C, Kerby A, Franklin Z, Amisten S, King AJ, Hassan Z, Vilches-Flores A, Tippu Z, Persaud SJ, Jones PM. Effect of hyperglycaemia on muscarinic M3 receptor expression and secretory sensitivity to cholinergic receptor activation in islets. Diabetes Obes Metab 2014; 16:947-56. [PMID: 24720683 DOI: 10.1111/dom.12301] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 03/10/2014] [Accepted: 04/04/2014] [Indexed: 01/07/2023]
Abstract
AIMS Islets are innervated by parasympathetic nerves which release acetylcholine (ACh) to amplify glucose-induced insulin secretion, primarily via muscarinic M3 receptors (M3R). Here we investigate the consequence of chronic hyperglycaemia on islet M3R expression and secretory sensitivity of mouse islets to cholinergic receptor activation. METHODS The impact of hyperglycaemia was studied in (i) islets isolated from ob/ob mice, (ii) alginate-encapsulated mouse islets transplanted intraperitoneally into streptozotocin-induced diabetic mice and (iii) mouse and human islets maintained in vitro at 5.5 or 16 mmol/l glucose. Blood glucose levels were assessed by a commercial glucose meter, insulin content by RIA and M3R expression by qPCR and immunohistochemistry. RESULTS M3R mRNA expression was reduced in both ob/ob islets and islets maintained at 16 mmol/l glucose for 3 days (68 and 50% control, respectively). In all three models of hyperglycaemia the secretory sensitivity to the cholinergic receptor agonist, carbachol, was reduced by 60-70% compared to control islets. Treatment for 72 h with the irreversible PKC activator, PMA, or the PKC inhibitor, Gö6983, did not alter islet M3R mRNA expression nor did incubation with the PI3K-inhibitor, LY294002, although enhancement of glucose-induced insulin secretion by LY294002 was reduced in islets maintained at 16 mmol/l glucose, as was mRNA expression of the PI3K regulatory subunit, p85α. CONCLUSIONS Cholinergic regulation of insulin release is impaired in three experimental islet models of hyperglycaemia consistent with reduced expression of M3 receptors. Our data suggest that the receptor downregulation is a PKC- and PI3K-independent consequence of the hyperglycaemic environment, and they imply that M3 receptors could be potential targets in the treatment of type 2 diabetes.
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Affiliation(s)
- A C Hauge-Evans
- Diabetes Research Group, Division of Diabetes and Nutritional Sciences, King's College London, London, UK
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Abud SH, Hassan Z, Yam F, Ghazai A. Comparison of the structural and optical properties of porous In0.08Ga0.92N thin films synthesized by electrochemical etching. J SOLID STATE CHEM 2014. [DOI: 10.1016/j.jssc.2013.10.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bhowmik NB, Hassan Z, Parvin S, Hasan ZR, Ali L. Neuropathic changes in young type 2 diabetes mellitus related to high serum t-PA. Bangladesh J Med Sci 2014. [DOI: 10.3329/bjms.v13i2.18302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background and Aims: A substantial number of diabetic patients, diagnosed at relatively younger age, who dont fit to typical type 2 and type 1 class of diabetes. These patients usually present with very high level of glycemia. The uniqueness of this group of patient provide the opportunity to explore the pathophysiology of nerve functional status at an early stage of diabetes. The present study was aimed to determine markers of endothelial dysfunction and evaluate nerve functional status of a group of newly diagnosed clinically uncomplicated young diabetic patients. Material and Methods: A total number of 32 (male-13 and female-19) newly diagnosed young (diabetes diagnosed under 30 yrs) were consecutively recruited from BIRDEM Out-patient department and 30 age-, BMI-matched healthy subjects with no family history of diabetes up to second generation served as controls. Serum fructosamine was measured by reduction test with NBT method. Serum C-peptide, endothelin-1 and tissue plasminogen activator (t-PA) by ELISA and von Willebrand factor (vWF) by Radial Immunodiffusion (RID) methods. Urinary albumin measured by immunoturbidimetry method. Nerve functional status was evaluated by nerve conduction velocities (NCV), distal latencies (DL), compound muscle action potential (CAMP), F wave latencies (FWL), nerve action potential (SNAP) for motor and sensory nerve as appropriate following the standard protocol. Results: Severe hyperglycemia in the diabetic group was reflected in their mean (SD) fasting C-peptide and fructosamine level. Altered endothelial dysfunction, as evidenced by significantly high tissue plasminogen activator (t-PA) (p<0.001) in the diabetic group. Albumin creatinine ratio (ACR) was almost similar in the two groups. Ulnar distal latency was similar in both the groups. But its CAMP and NCV were significantly lower in the diabetic group (p<0.02-0.001). Ulnar F wave latency were significantly higher (p=0.016) in the diabetic group. Ulnar sensory conduction parameters did not show any difference between two groups. Peroneal motor and sural sensory functional status of the diabetic subjects showed similar trend like that of ulnar motor and sensory status. Peroneal nerve motor NCV was significantly negatively correlated with fasting glucose [r=- 0.456, p=0.001]. Peroneal motor distal latency was significantly correlated with fasting fructosamine [r=0.439, p=0.012]. Fasting fructosamine showed significant negative correlation with motor peroneal NCV [r=-0.572, p=0.001], motor ulnar NCV [r=-0.468, p=0.007], both ulnar and sural sensory NAP (p=0.02 for both]. On the basis of F wave latency 53% of diabetic subjects had diabetic neuropathy and markedly higher t-PA compared to nonneuropathy groups (p=0.001). Conclusions: The data suggest that (i) Young type 2 diabetic subjects had endothelial dysfunction at the time of diagnosis even in the presence of normoalbuminuria state; (ii) Motor nerve conduction parameters are affected more than the sensory component; (iii) F wave latencies are more frequently and early to be involved in these subjects and linked to high serum t-PA. DOI: http://dx.doi.org/10.3329/bjms.v13i2.18302 Bangladesh Journal of Medical Science Vol.13(2) 2014 p.190-197
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Islam S, Hassan Z, Pathan F. Pattern of hypothyroid cases in Bangladeshi People: A pilot study. Bangladesh J Med Sci 2013. [DOI: 10.3329/bjms.v12i4.16660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Aims: The present study was undertaken to explore the pathological basis of hypothyroidism and it relationship to clino-biochemical features of Bangladeshi patients. Material and Methods: A total number of 47 hypothyroid patients with duration less than two years and had no other comorbid disease were consecutively recruited from BIRDEM Out-patient department. Patients having serum FT4 level <9.14 pmol/L and serum TSH >5.01 IU/ml were identified as hypothyroidism. Presence of either anti TG antibody >40 IU/ml or anti TPO antibody > 35 IU/ml or both were defined as autoimmune hypothyroidism. Thyroid gland was examined and classified according to joint criteria of WHO, UNICEF and ICCIDD criteria. Results: Female preponderance was observed in this series though small total number of samples. Familial hypothyroidism was reported in 19% of cases and 8% of patients came from iodine deficient area. Out of 47 cases autoimmune markers were done in 40 and of them 32 (68%) were positive for autoantibodies. Of the positive case 22% were positive for anti TPO antibody and 6% for anti TG antibody; 72% cases both. Drug and radiation were excluded as the cause of hypothyroidism in this series. Family history of hypothyroidism was positive in 22% and 25% autoimmune and non-autoimmune study cases. Of the autoimmune case 44% had age between 30-44 years and among non-autoimmune case 37% were 15-30 years. Eleven of 32 (34%) autoimmune hypothyroid cases presented with irregular menstrual cycle. Out of 47 hypothyroid patients in this study, 36 (77%) had palpable or enlarged thyroid gland. Of the 40 cases autoimmune status evaluated palpable among 25 (78%) autoimmune and 6 (75%) non-autoimmune hypothyroid patients. Conclusions: It is concluded that higher proportion of hypothyroid cases are of antoantibody positive. These subjects have heterogeneous phenotypic presentation. This necessitates that all newly detected hypothyroidism should be screened for autoimmune status with the same importance as given for thyroid hormone level and managed accordingly. DOI: http://dx.doi.org/10.3329/bjms.v12i4.16660 Bangladesh Journal of Medical Science Vol. 12 No. 04 October 13 Page 405-412
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Ahmad F, Suominen JS, Hassan Z, Pizer BL, Duncan C, Losty PD. Use of a tissue expander as a radio-protective spacer with a latissimus dorsi flap in the management of a peripheral primitive neuroectodermal tumour (pPNET). J Plast Reconstr Aesthet Surg 2013; 66:e169-71. [PMID: 23582507 DOI: 10.1016/j.bjps.2013.02.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Revised: 02/12/2013] [Accepted: 02/20/2013] [Indexed: 10/27/2022]
Abstract
Peripheral primitive neuroectodermal tumours (pPNET) are aggressive neoplasms that require radical surgical resection with adjuvant chemotherapy and radiotherapy. A pPNET of the posterior chest wall was resected with wide soft tissue margins in a 14 year old male. Following tumour excision a spacer device was positioned in the retroperitoneum adjacent to the ipsilateral left kidney displacing it from the planned radiotherapy field. A pedicled latissimus dorsi myocutaneous flap was used to achieve robust soft tissue cover. Ultrasound demonstrated anteromedial displacement of the left kidney with no hydronephrosis and renal function remained normal during subsequent radiotherapy. This report highlights the usefulness of a tissue expander in providing protection for vital structures during radiotherapy.
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Affiliation(s)
- F Ahmad
- Department of Plastic & Reconstructive Surgery, Alder Hey Children's Hospital NHS Foundation Trust, Eaton Road, Liverpool L12 2AP, United Kingdom.
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Al Hashmi S, Sadeghi B, Hassan Z, Abedi-Valugerdi M, Lindskog M, Hassan M. Omega-3 from fish oil augments GVHD through the enhancement of chemotherapy conditioning regimen and selective FoxP3 depletion. Bone Marrow Transplant 2012. [DOI: 10.1038/bmt.2012.227] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Rahman MM, Hassan Z, Biswas KB, Bhowmik NB, Ali L. Plasma total homocysteine is not associated with peripheral neuropathy in a groups Bangladeshi type 2 diabetic subjects. Bangladesh J Med Sci 2012. [DOI: 10.3329/bjms.v11i4.12607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Aims: The present study was undertaken to explore the relationship of plasma homocysteine in the pathogenesis of neuropathy in diabetic patients.Subjects and Methods: Forty two type 2 diabetic patients [22 with neuropathy (DN group) and 20 without neuropathy (DNN group)], age range between 35-70 years had relatively controlled glycemia and duration of diabetes 7-15 years, were studied. Motor and sensory nerve conduction velocities and action potential amplitudes of peripheral nerves were determined by following standard protocol. HbA1c was estimated by modified HPLC (BIO-RAD Variant, USA). Serum C-peptide was measured by enzyme linked immunosorbentassay (ELISA), plasma total homocysteine by Fluorescent Polarization Immunoassay (FPIA). Results: Age, BMI and blood pressure of the study subjects were. Duration of diabetes between DN and DNN groups was comparable. DN group had significantly higher fasting glucose levels (9.8±3.8, mmol/l) compared to the DNN group (6.9±1.8, p=0.004). This trend was also reflected in the HbA1c level: 8.7± 2.1 vs 7.2±1.6 in DN group and DNN group respectively (p=0.009). The two diabetic groups had relatively higher absolute C-peptide level compared to the controls (p=ns). DN and DNN groups had significantly higher plasma homocysteine level compared to the Controls. But between the two diabetic groups no significant difference was observed. Ulnar and peroneal motor nerve conduction velocities and compound muscle action potentials in the diabetic neuropathy group significantly lower compared to diabetic counterpart and the controls. Ulnar and sural sensory nerve conduction velocities and action potentials were significantly lower in the diabetic neuropathy group compared to the diabetic counterpart and the controls. Plasma homocysteine did not show any correlation with nerve conduction velocities and action potential amplitudes.Conclusions: The data concluded that (i) Diabetic neuropathy may not be related to hyperhomocysteinemia in type 2 diabetic patients of Bangladeshi origin; (ii) Hyperglycemia, even at milder level, is related to neuronal dysfunction in these subjects; and (ii) Hyperinsulinemia don't seem to be prerequisite for neuropathy in these subjects. DOI: http://dx.doi.org/10.3329/bjms.v11i4.12607 Bangladesh Journal of Medical Science Vol. 11 No. 04 Oct12
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Howarth FC, Qureshi MA, Hassan Z, Isaev D, Parekh K, John A, Oz M, Raza H, Adeghate E, Adrian TE. Contractility of ventricular myocytes is well preserved despite altered mechanisms of Ca2+ transport and a changing pattern of mRNA in aged type 2 Zucker diabetic fatty rat heart. Mol Cell Biochem 2011; 361:267-80. [PMID: 22009485 DOI: 10.1007/s11010-011-1112-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Accepted: 10/07/2011] [Indexed: 02/07/2023]
Abstract
There has been a spectacular rise in the global prevalence of type 2 diabetes mellitus and cardiovascular complications are the major cause of morbidity and mortality in diabetic patients. The objective of the study was to investigate ventricular myocyte shortening, intracellular Ca(2+) signalling and expression of genes encoding cardiac muscle proteins in the aged Zucker diabetic fatty (ZDF) rat. There was a fourfold elevation in non-fasting blood glucose in ZDF rats (478.43 ± 29.22 mg/dl) compared to controls (108.22 ± 2.52 mg/dl). Amplitude of shortening, time to peak (TPK) and time to half (THALF) relaxation of shortening were unaltered in ZDF myocytes compared to age-matched controls. Amplitude and THALF decay of the Ca(2+) transient were unaltered; however, TPK Ca(2+) transient was prolonged in ZDF myocytes (70.0 ± 3.2 ms) compared to controls (58.4 ± 2.3 ms). Amplitude of the L-type Ca(2+) current was reduced across a wide range of test potentials (-30 to +40 mV) in ZDF myocytes compared to controls. Sarcoplasmic reticulum Ca(2+) content was unaltered in ZDF myocytes compared to controls. Expression of genes encoding cardiac muscle proteins, membrane Ca(2+) channels, and cell membrane ion transport and intracellular Ca(2+) transport proteins were variously altered. Myh6, Tnnt2, Cacna2d3, Slc9a1, and Atp2a2 were downregulated while Myl2, Cacna1g, Cacna1h, and Atp2a1 were upregulated in ZDF ventricle compared to controls. The results of this study have demonstrated that preserved ventricular myocyte shortening is associated with altered mechanisms of Ca(2+) transport and a changing pattern of genes encoding a variety of Ca(2+) signalling and cardiac muscle proteins in aged ZDF rat.
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Affiliation(s)
- F C Howarth
- Department of Physiology, Faculty of Medicine & Health Sciences, United Arab Emirates University, Al Ain, UAE.
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Hassan Z, Kordesch ME, Jadwisienzak WM, Lozykowski HJ, Halverson W, Colter PC. Low Temperature ECR -Plasma Assisted MOCVD Microcrystalline and Amorphous GaN Deposition and Characterization for Electronic Devices. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-536-245] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractGaN films have been deposited over a range of temperatures from 50 C to 650 C by ECR plasma MOCVD on silicon (111) and (100), sapphire and quartz using triethylgallium and molecular nitrogen or ammonia as reagents. Growth rates of 2 um/hr are achieved on temperature-controlled substrates (total reactor pressure 0.5 mTorr, 250 watts at 2.45 GHz).Films deposited at 200, 600 and 650 C on sapphire show the GaN(0002) diffraction peak and sharp photoluminescence lines (at 10 K) between 370 and 400 nm and broad emission at 530-550 nm. Broad photoluminescence at 390 nm is observed from GaN/Si( 11). Films deposited at 50 and 100 C show no evidence of a crystalline phase or GaN(0002) diffraction peak. The films are smooth and optically transparent. A broad photoluminescence peak at 520 nm, with a fwhm of about 150 nm is also observed (at 10K). The optical bandgap is measured to be about 2.6-2.7 eV. All of these films show a GaN LO phonon mode at 736 cm-l. IR spectra indicate some hydrocarbon impurities in the low temperature films.Prototype devices (Schottky barrier diodes) have been made from MOCVD GaN and amorphous GaN.
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Ghaffarifar F, Jorjani O, Tabatabaie F, Sharifi Z, Asl H, Hassan Z, Khoshzaban F, Ghasemi S. PP-178 LACK and TSA gene of Leishmania major cloned in eukaryotic expression vector could increase survival time in BALB/c mice significantly. Int J Infect Dis 2011. [DOI: 10.1016/s1201-9712(11)60329-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Mian MAH, Mullins RF, Alam B, Brandigi C, Friedman BC, Shaver JR, Hassan Z. Workplace-related burns. Ann Burns Fire Disasters 2011; 24:89-93. [PMID: 22262966 PMCID: PMC3230153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Indexed: 05/31/2023]
Abstract
Introduction. The key element of a safe workplace for employees is the maintenance of fire safety. Thermal, chemical, and electrical burns are common types of burns at the workplace. This study assessed the epidemiology of work-related burn injuries on the basis of the workers treated in a regional burn centre. Methods. Two years' retrospective data (2005-2006) from the Trauma Registry of the American College of Surgeons of the Joseph M. Still Burn Center at Doctors Hospital in Augusta, Georgia, were collected and analysed. Results. During the time period studied, 2510 adult patients with acute burns were admitted; 384 cases (15%) were work-related. The average age of the patients was 37 yr (range, 15-72 yr). Males constituted the majority (90%) of workrelated burn injury admissions. The racial distribution was in accordance with the Centre's admission census. Industrial plant explosions accounted for the highest number of work-related burns and, relatively, a significant number of patients had chemical burns. The average length of hospital stay was 5.54 days. Only three patients did not have health insurance and four patients (1%) died. Conclusion. Burn injuries at the workplace predominantly occur among young male workers, and the study has shown that chemical burns are relatively frequent. This study functions as the basis for the evaluation of work-related burns and identification of the causes of these injuries to formulate adequate safety measures, especially for young, male employees working with chemicals.
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Affiliation(s)
- M A H Mian
- Joseph M. Still Research Foundation at Doctors Hospital, Augusta, Georgia, USA
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Hassan Z, Nisa M, Shahzad MA, Sarwar M. Replacing Concentrate with Wheat Straw Treated with Urea Molasses and Ensiled with Manure: Effects on Ruminal Characteristics, In situ Digestion Kinetics and Nitrogen Metabolism of Nili-Ravi Buffalo Bulls. Asian Australas J Anim Sci 2011. [DOI: 10.5713/ajas.2011.10337] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ghazai AJ, Thahab SM, Abu Hassan H, Hassan Z. Quaternary ultraviolet AlInGaN MQW laser diode performance using quaternary AlInGaN electron blocking layer. Opt Express 2011; 19:9245-9254. [PMID: 21643179 DOI: 10.1364/oe.19.009245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The effect of polarization-matched Al(0.25)In(0.08)Ga(0.67)N electron-blocking layer (EBL) on the optical performance of ultraviolet Al(0.08)In(0.08)Ga(0.84)N/Al(0.1)In(0.01)Ga(0.84)N multi-quantum well (MQW) laser diodes (LDs) was investigated. The polarization-matched Al(0.25)In(0.08)Ga(0.67)N electron blocking layer (EBL) was employed in an attempt to reduce the polarization effect inside the active region of the diodes. The device performance which is affected by piezoelectric was studied via drift-diffusion model for carrier transport, optical gain and losses using the simulation program of Integrated System Engineering Technical Computer Aided design (ISE TCAD). The optical performance of the LD using quaternary Al(0.25)In(0.08)Ga(0.67)N EBL was compared with the LD using ternary Al(0.3)Ga(0.7)N EBL where both materials have the same energy band gap of Eg = 3.53 eV. The self-consistent ISE-TCAD simulation program results showed that the polarization-matched quaternary Al(0.25)In(0.08)Ga(0.67)N EBL is beneficial as it confines the electrons inside the quantum well region better than ternary Al(0.3)Ga(0.7)N EBL. The results indicated that the use of Al(0.25)In(0.08)Ga(0.67)N EBL has lower threshold current and higher optical intensity than those for Al(0.3)Ga(0.7)N EBL. The effect of Al(0.25)In(0.08)Ga(0.67)N EBL thickness on the performance of LDs has also been studied. Results at room temperature indicated that lower threshold current, high slope efficiency, high output power, and high differential quantum efficiency DQE occurred when the thickness of Al(0.25)In(0.08)Ga(0.67)N EBL was 0.25 µm.
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Affiliation(s)
- A J Ghazai
- Nano-Optoelectronics Research and Technology Laboratory, School of Physics, University Science USM, Malaysia, 11800- Penang, Malaysia.
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Chuah LS, Hassan Z, Tneh SS. Single Crystalline ZnO Nanowires by Oxidizing Granular Zinc Film. J DISPER SCI TECHNOL 2011. [DOI: 10.1080/01932691003800239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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