LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 1612

Search options

  1. Article: Quantitative and qualitative determination of dimethyl phthalate and N, N-diethyl-m-toluamide in repellents commercial formulations by high performance thin layer chromatography.

    Khoobdel, Mehdi / Jonaidi, Nematollah / Sharif, Babak

    Pakistan journal of biological sciences : PJBS

    2008  Volume 10, Issue 20, Page(s) 3678–3682

    Abstract: In this study HPTLC was used for simultaneous quantitative and qualitative determination of N, N ...

    Abstract In this study HPTLC was used for simultaneous quantitative and qualitative determination of N, N-diethyl meta toluamide (DEET) and dimethyl phthalate (DMP), which are the main elements and active ingredients in current chemical repellents. Some defined amounts of commercial form of 3 repellents included trench pomade, stick insect repellent (SIR), which is containing 33% of DEET and DMP60 (dimethyl phthalate 60%) dissolved in ethyl acetate solvent, separately. The method employed TLC aluminum plate precoated with silica gel plates (SiO4) 60F245 as the stationary phase. The solvent system consisted of benzene-diethyl etherhexane (5:3:2, v/v/v) as mobile phase. The multiple level method used for spotting. Densitometric analysis of repellents was carried out using TLC scanner 3 and CATS4 software in the absorption/reflection mode at 230 nm. According to the results, the type and amount of active ingredients in DMP60 lotion was 61.8 g (SE = +/-1.6) per 100 cc and in SIR, 31.3 g (SE = +/-0.8) diethyl meta toluamide per 100 g of repellents raw materials. Also the active ingredients in trench pomade were determined as a combination of DMP and DEET by rates of 5.5 g (SE = +/-0.2) and 25 g (SE = +/-l) per 100 g repellents commercial formulations, respectively. In this study, the value of Rf for DMP and DEET was calculated 0.71 +/- 0.2 and 0.32 +/- 0.2, respectively. HPTLC is a suitable method to quantitatively and quantitatively determine repellents which have DMP and DEET active ingredients. Since most of commercial chemical repellents have this active ingredient, adjusting and setting HPTLC up can be important.
    MeSH term(s) Animals ; Chromatography, Thin Layer/methods ; DEET/analysis ; Humans ; Insect Repellents/chemistry ; Phthalic Acids/analysis
    Chemical Substances Insect Repellents ; Phthalic Acids ; dimethyl phthalate (08X7F5UDJM) ; DEET (134-62-3)
    Language English
    Publishing date 2008-12-17
    Publishing country Pakistan
    Document type Journal Article
    ISSN 1028-8880
    ISSN 1028-8880
    DOI 10.3923/pjbs.2007.3678.3682
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Quantitative and Qualitative Determination of Dimethyl Phthalate and N, N-Diethyl-m-Toluamide in Repellents Commercial Formulations by High Performance Thin Layer Chromatography

    Mehdi Khoobdel / Nematollah Jonaidi / Babak Sharif

    Pakistan Journal of Biological Sciences, Vol 10, Iss 20, Pp 3678-

    2007  Volume 3682

    Abstract: In this study HPTLC was used for simultaneous quantitative and qualitative determination of N, N ...

    Abstract In this study HPTLC was used for simultaneous quantitative and qualitative determination of N, N-diethyl meta toluamide (DEET) and dimethyl phthalate (DMP), which are the main elements and active ingredients in current chemical repellents. Some defined amounts of commercial form of 3 repellents included trench pomade, stick insect repellent (SIR), which is containing 33% of DEET and DMP60 (dimethyl phthalate 60%) dissolved in ethyl acetate solvent, separately. The method employed TLC aluminum plate precoated with silica gel plates (SiO 4 ) 60F 245 as the stationary phase. The solvent system consisted of benzene-diethyl ether-hexane (5:3:2, v/v/v) as mobile phase. The multiple level method used for spotting. Densitometric analysis of repellents was carried out using TLC scanner 3 and CATS4 software in the absorption/reflection mode at 230 nm. According to the results, the type and amount of active ingredients in DMP60 lotion was 61.8 g (SE = ±1.6) per 100 cc and in SIR, 31.3 g (SE = ±0.8) diethyl meta toluamide per 100 g of repellents raw materials. Also the active ingredients in trench pomade were determined as a combination of DMP and DEET by rates of 5.5 g (SE = ±0.2) and 25 g (SE = ±1) per 100 g repellents commercial formulations, respectively. In this study, the value of R f for DMP and DEET was calculated 0.71±0.2 and 0.32±0.2, respectively. HPTLC is a suitable method to quantitatively and quantitatively determine repellents which have DMP and DEET active ingredients. Since most of commercial chemical repellents have this active ingredient, adjusting and setting HPTLC up can be important.
    Keywords Thin layer chromatography ; repellents ; dimethyl phthalate ; diethyl tuloamide ; Biology (General) ; QH301-705.5 ; Science ; Q ; DOAJ:Biology ; DOAJ:Biology and Life Sciences
    Subject code 540
    Language English
    Publishing date 2007-01-01T00:00:00Z
    Publisher Asian Network for Scientific Information
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  3. Article: Affinities of muscarinic drugs for [3H]N-methylscopolamine (NMS) and [3H]oxotremorine (OXO) binding to a mixture of M1-M4 muscarinic receptors: use of NMS/OXO-M ratios to group compounds into potential agonist, partial agonist, and antagonist classes.

    Sharif, N A / Williams, G W / DeSantis, L M

    Neurochemical research

    1995  Volume 20, Issue 6, Page(s) 669–674

    Abstract: The relative affinities of various muscarinic drugs in the antagonist ([3H]N-methyl scopolamine ... 3H]NMS)) and agonist ([3H]Oxotremorine-m ([3H]OXO-M)) binding assays using a mixture of tissues ... n = 3) and to a high density Bmax = 11.8 +/- 0.025 nmol/g wet weight) of muscarinic receptors. [3H ...

    Abstract The relative affinities of various muscarinic drugs in the antagonist ([3H]N-methyl scopolamine ([3H]NMS)) and agonist ([3H]Oxotremorine-m ([3H]OXO-M)) binding assays using a mixture of tissues containing M1-M4 receptor subtypes have been determined. [3H]NMS bound with high affinity (Kd = 25 +/- 5.9 pM; n = 3) and to a high density Bmax = 11.8 +/- 0.025 nmol/g wet weight) of muscarinic receptors. [3H]OXO-M appeared to bind to two binding sites with differing affinities (Kd1 = 2.5 +/- 0.1 nM; Kd2 = 9.0 +/- 4.9 microM; n = 4) and to a different population of binding sites (Bmax1 = 5.0 +/- 0.26 nmol/g wet weight; Bmax2 = 130 +/- 60 nmol/g wet weight). Well known antagonists exhibited high affinity for [3H]NMS binding but a lower affinity for [3H]OXO-M binding. The opposite was true for acetylcholine and other known agonists. However, pilocarpine and McN-A-343 had similar affinities for sites labeled by both radioligands. Using the ratios of antagonist-to-agonist binding affinities, it was possible to group compounds into apparently distinct full agonist (ratios of 180-665; e.g. carbachol, muscarine, OXO-M, OXO-S and arecoline), partial agonist (ratios of 14-132; e.g. McN-A-343, pilocarpine, aceclidine, bethanechol, OXA-22 and acetylcholine) and antagonist (ratios of 0.22-1.9; e.g. atropine, NMS, pirenzepine, methoctramine, 4-DAMP and p-fluorohexahydrosialo-difenidol) classes. These data suggest that the NMS/OXO-M affinity ratios using a mixture of M1-M4 muscarinic receptors may be a useful way to screen and group a large number of compounds into apparent agonist, partial agonist, and antagonist classes of cholinergic agents.
    MeSH term(s) Animals ; Binding, Competitive ; Brain/metabolism ; Cholinergic Agents/classification ; Cholinergic Agents/metabolism ; Kinetics ; Lung/metabolism ; Muscarinic Agonists ; Muscarinic Antagonists ; Myocardium/metabolism ; N-Methylscopolamine ; Oxotremorine/metabolism ; Rabbits ; Radioligand Assay ; Rats ; Receptors, Muscarinic/metabolism ; Scopolamine Derivatives/metabolism ; Tritium
    Chemical Substances Cholinergic Agents ; Muscarinic Agonists ; Muscarinic Antagonists ; Receptors, Muscarinic ; Scopolamine Derivatives ; Tritium (10028-17-8) ; Oxotremorine (5RY0UWH1JL) ; N-Methylscopolamine (VDR09VTQ8U)
    Language English
    Publishing date 1995-06
    Publishing country United States
    Document type Comparative Study ; Journal Article
    ZDB-ID 199335-5
    ISSN 1573-6903 ; 0364-3190
    ISSN (online) 1573-6903
    ISSN 0364-3190
    DOI 10.1007/bf01705534
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article: Diabetes-Related Microvascular Complications in Primary Health Care Settings in the West Bank, Palestine.

    Dweib, Mohammad / El Sharif, Nuha

    Journal of clinical medicine

    2023  Volume 12, Issue 21

    Abstract: Background: Worldwide, retinopathy, nephropathy, and neuropathy are the major diabetes-related microvascular complications. In Palestine, a low-middle-income country, diabetes is the fourth reason for death. However, a few studies examined diabetes ... ...

    Abstract Background: Worldwide, retinopathy, nephropathy, and neuropathy are the major diabetes-related microvascular complications. In Palestine, a low-middle-income country, diabetes is the fourth reason for death. However, a few studies examined diabetes microvascular consequences and its management. Therefore, we carried out a national study that aims to investigate the factors associated with diabetes-related microvascular complications among individuals seeking care in primary healthcare settings of the West Bank of Palestine.
    Method: Using a cluster systematic sampling technique, 882 participants with diabetes patients were chosen for a cross-sectional study from primary healthcare facilities operated by the Ministry of Health (PMoH), the United Nations Relief and Works Agency (UNRWA), and the Palestinian Medical Relief Society (PMRS). Data about patients related to diabetes-related complications, medication use, and other diseases were extracted from patients' medical records. In addition, an interview face-to-face questionnaire was used to collect information about patients' sociodemographic variables, medical history, smoking habits, duration of the disease, presence of concurrent conditions previous referrals, and hospital admissions, as well as their level of knowledge regarding diabetes, complications, and treatments.
    Results: Approximately 34.4% of persons with diabetes patients in Palestine encounter at least one microvascular complication associated with diabetes. The most prevalent diabetes-related microvascular complication was retinopathy (17.3%), 23.4% of participants had more than one microvascular complication, and 29% of male patients had erectile dysfunction. A higher probability of having any microvascular complications was associated with older age (over 60 years). Participants with diabetes patients with fundoscopy or ophthalmology reports, according to diabetes follow-up guidelines, were less likely to develop retinopathy. Also, those who performed regular kidney function testing were less likely to have nephropathy, and those who performed a regular foot exam were less likely to develop diabetic foot.
    Conclusions: Diabetes-related microvascular complications were associated with patient age, low education level, residency location, and adherence to diabetes follow-up guidelines of diabetes management; i.e., having been tested for HbA1c, consulting with specialists, regular kidney function, and foot examination. These factors can be utilized in setting up proper management protocols to prevent or delay microvascular complications in many patients.
    Language English
    Publishing date 2023-10-24
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662592-1
    ISSN 2077-0383
    ISSN 2077-0383
    DOI 10.3390/jcm12216719
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article: Analyzing nonlinear oscillations with He's frequency-amplitude method and numerical comparison in jet engine vibration system.

    Kawser, M Abul / Alim, Md Abdul / Sharif, Nazmul

    Heliyon

    2024  Volume 10, Issue 2, Page(s) e24261

    Abstract: In this study, we describe and successfully solve a jet engine vibration equation using a straightforward tool known as the He's frequency-amplitude Method (HFAM). The jet engine vibration system demonstrates diverse applications across aerospace, power ... ...

    Abstract In this study, we describe and successfully solve a jet engine vibration equation using a straightforward tool known as the He's frequency-amplitude Method (HFAM). The jet engine vibration system demonstrates diverse applications across aerospace, power generation, industrial machinery, transportation, marine propulsion, energy optimization, defense, and aviation training. Utilizing HFAM, we derive periodic solutions in a general form for this system, considering various cases dependent on damping and driving forces. The obtained results highlight the effectiveness of HFAM as a distinct and straightforward technique for nonlinear equations. By comparing the solutions with numerical results obtained using the fourth-order Runge-Kutta method, we demonstrate the excellent accuracy of our solutions.
    Language English
    Publishing date 2024-01-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2024.e24261
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: Efficacy and Safety Outcomes of XEN Implantation and Gonioscopy-assisted Transluminal Trabeculotomy for the Management of Advanced Open-angle Glaucoma.

    Ruparelia, Sunil / Sharif, Mohammed / Shoham-Hazon, Nir

    Journal of current glaucoma practice

    2023  Volume 17, Issue 2, Page(s) 63–67

    Abstract: ... outcomes in patients with advanced OAG.: How to cite this article: Ruparelia S, Sharif M, Shoham-Hazon N ...

    Abstract Aim: Minimally invasive glaucoma surgery (MIGS) is not typically used in patients with advanced-stage glaucoma. This study describes the outcomes and complications of patients with advanced open-angle glaucoma (OAG) who underwent XEN implantation with cataract surgery or gonioscopy-assisted transluminal trabeculotomy (GATT) with cataract surgery.
    Methods: This retrospective study identified patients who had undergone XEN implantation or GATT for the management of advanced OAG. Outcomes included surgical success, intraocular pressure (IOP) reduction, number of topical IOP-lowering drops, visual field mean deviation (MD), best-corrected visual acuity (BCVA), and complications. Surgical success was defined as an IOP of <14 mm Hg and a 20% reduction at 12 months without topical IOP-lowering drops (complete success) or with topical IOP-lowering drops (qualified success).
    Results: Exactly 70 eyes were enrolled in this study, including 35 who had undergone XEN implantation and 35 who had undergone GATT. The overall surgical success rate was 74.3% (26 of 35) for eyes that underwent XEN implantation and 71.4% (25 of 35) for eyes that underwent GATT. Percent IOP reduction from baseline to 12 months postoperatively was 48% in the XEN cohort and 32% in the GATT cohort. Significant reduction in the use of topical IOP-lowering drops was demonstrated for both XEN (3.26 ± 1.15-1.23 ± 1.28) (
    Conclusions: Both XEN implantation and GATT may be safe and effective management options when treating patients with advanced OAG. However, larger sample sizes are required to make direct statistical comparisons between these techniques.
    Clinical significance: In this study, XEN implantation and GATT combined with cataract surgery were each associated with favorable outcomes in patients with advanced OAG.
    How to cite this article: Ruparelia S, Sharif M, Shoham-Hazon N. Efficacy and Safety Outcomes of XEN Implantation and Gonioscopy-assisted Transluminal Trabeculotomy for the Management of Advanced Open-angle Glaucoma. J Curr Glaucoma Pract 2023;17(2):63-67.
    Language English
    Publishing date 2023-06-16
    Publishing country India
    Document type Journal Article
    ISSN 0974-0333
    ISSN 0974-0333
    DOI 10.5005/jp-journals-10078-1394
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Exploring Potential Referral Pathways for Renal Artery Denervation and Developing a Centre of Excellence in Ireland.

    Leahy, Niall / Wagener, Max / Shahzad, Shirjeel / Murphy, Darragh / McMorrow, Amy / Coen, Eileen / Sharif, Ruth / Sharif, Faisal

    SN comprehensive clinical medicine

    2024  Volume 6, Issue 1, Page(s) 32

    Abstract: Arterial hypertension is one of the most significant and prevalent risk factors for cardiovascular disease. Despite widespread awareness of the condition, as well as a multitude of available antihypertensive drug classes, rates of uncontrolled ... ...

    Abstract Arterial hypertension is one of the most significant and prevalent risk factors for cardiovascular disease. Despite widespread awareness of the condition, as well as a multitude of available antihypertensive drug classes, rates of uncontrolled hypertension remain high on a global scale. Frequently, poor compliance with anti-hypertensive medication plays a big role in patients' inability to attain adequate blood pressure control. In individuals with resistant and/or uncontrolled hypertension, renal denervation is an emerging device-based therapy that has shown to be efficacious and safe in reducing blood pressure in several sham controlled trials. Additionally, it represents a treatment option for patients intolerant to oral pharmacotherapy. University Hospital Galway has been performing renal denervation procedures over the past number of years within multicentre, international sham-controlled trials and registries. Representing a novel and emerging antihypertensive treatment option, sources of referral for renal denervation are diverse and multiple; thus, there is an unmet need for standardised referral structures in Ireland. Herein, we review current and developing referral pathways for renal denervation at our institution, and discuss streamlined patient management and requirements to establish a centre of excellence.
    Language English
    Publishing date 2024-03-16
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2947211-8
    ISSN 2523-8973 ; 2523-8973
    ISSN (online) 2523-8973
    ISSN 2523-8973
    DOI 10.1007/s42399-024-01647-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Bilateral pneumothorax in a patient with angiosarcoma of the scalp: a case report.

    Vaqar, Maham / Sharif, Ayesha / Iqbal, Nousheen / Irfan, Muhammad

    Journal of medical case reports

    2023  Volume 17, Issue 1, Page(s) 173

    Abstract: Background: Angiosarcoma is a rare, vascular malignancy that arises from endothelial cells of blood vessels. This case report aims to create the awareness of its existence in the region and its mode of presentation.: Case presentation: A 63-year-old ... ...

    Abstract Background: Angiosarcoma is a rare, vascular malignancy that arises from endothelial cells of blood vessels. This case report aims to create the awareness of its existence in the region and its mode of presentation.
    Case presentation: A 63-year-old Pakistani man presented to the emergency department with sudden bilateral chest pain and shortness of breath for 2 days. On examination, a scalp lesion was seen which had been increasing in size over the last 6 weeks. The lesion was 8 × 10 cm in size with an irregular border, non-tender, violet and dome-shaped in elevation on the right occipito-parietal lobe of the skull. Chest computed tomography (CT) showed multiple cystic lesions on both lungs, patchy areas of ground-glass opacities, nodules of variable sizes and bilateral pneumothorax. Bilateral tube thoracostomy was performed which provided symptomatic relief for shortness of breath. His bronchoalveolar lavage (BAL) was negative for infection. He underwent biopsy of scalp lesion which was positive for aggressive angiosarcoma.
    Conclusion: Bilateral spontaneous pneumothorax can be the initial manifestation of aggressive cutaneous angiosarcoma and frequently leads to respiratory failure. Early recognition is essential to prevent delay in diagnosis and management.
    MeSH term(s) Male ; Humans ; Middle Aged ; Pneumothorax/diagnostic imaging ; Pneumothorax/etiology ; Pneumothorax/therapy ; Hemangiosarcoma/complications ; Hemangiosarcoma/diagnostic imaging ; Hemangiosarcoma/pathology ; Scalp/pathology ; Endothelial Cells/pathology ; Lung Neoplasms/pathology ; Dyspnea/etiology
    Language English
    Publishing date 2023-05-01
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 2269805-X
    ISSN 1752-1947 ; 1752-1947
    ISSN (online) 1752-1947
    ISSN 1752-1947
    DOI 10.1186/s13256-023-03878-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: Tuberculosis detection from raw sputum samples using Au-electroplated screen-printed electrodes as E-DNA sensor.

    Sharif, M N / Taufiq, S / Sohail, M / Abbas, S R

    Frontiers in chemistry

    2022  Volume 10, Page(s) 1046930

    Abstract: Tuberculosis (TB) remains a leading cause of death globally, especially in underdeveloped nations. The main impediment to TB eradication is a lack of efficient diagnostic tools for disease diagnosis. In this work, label free and ultrasensitive ... ...

    Abstract Tuberculosis (TB) remains a leading cause of death globally, especially in underdeveloped nations. The main impediment to TB eradication is a lack of efficient diagnostic tools for disease diagnosis. In this work, label free and ultrasensitive electrochemical DNA biosensor for detecting
    Language English
    Publishing date 2022-11-21
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2711776-5
    ISSN 2296-2646
    ISSN 2296-2646
    DOI 10.3389/fchem.2022.1046930
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: The Outcome of A Centralization Program in Biliary atresia: 20 years and beyond.

    Davenport, Mark / Makin, Erica / Ong, Evelyn Gp / Sharif, Khalid / Dawrant, Michael / Alizai, Naved

    Annals of surgery

    2024  

    Abstract: ... born with BA and managed between January 1999 and December 2019. Death occurred without intervention (n ... 10, 1.1%) or were subject to primary transplant (n=26, 3.0%); leaving 831 (95.9%) infants ...

    Abstract Objective: Biliary atresia (BA) is a rare disease and reported outcomes of surgical management, typically a Kasai portoenterostomy (KPE), vary considerably across the world. Centralization has been proposed to improve this.
    Summary background data: A national centralization programme was started in Jan. 1999, involving 3 English units with co-located liver transplant facilities. As the program has now reached the 20-year point, the main aim was to update outcome statistics and identify trends.
    Methods: Prospective registry and database. The main measures of outcome were (i) time to KPE, (ii) Clearance of Jaundice (CoJ), defined as reaching a bilirubin value of <20µmol/L (≈1.5 mg/dL), and (iii) actuarial native liver survival (NLS) and overall survival (OS). Data are quoted as median (IQR) and non-parametric statistical comparison used with P<0.05 regarded as significant.
    Results: 867 infants were born with BA and managed between January 1999 and December 2019. Death occurred without intervention (n=10, 1.1%) or were subject to primary transplant (n=26, 3.0%); leaving 831 (95.9%) infants who underwent KPE at median age of 51 (IQR 39-64) days. Age at KPE reduced over the period (P=0.0001) becoming 48(35-57) days in the last 5-year era. CoJ was achieved in 505/831 (60.6%), also increasing over the period (P=0.002). 42 (5.0%) died post-KPE and 384 were transplanted, leaving 405 alive with their native livers at last follow-up. Of the 412 children transplanted, there were 23 (5.6%) deaths, leaving 387 alive. 5-year and 10-year native liver survival were 51.3% (95% CI 54.8-47.8) and 46.5% (95% CI 50.1 - 42.9) and overall survival were 91.5% (95% CI 93.2 - 89.4) and 90.5% (95% CI 92.3 - 88.2%) respectively.
    Conclusions: There have been continued improvements in efficiency over the period of centralization with a significant reduction in time to KPE and improved CoJ following KPE. Overall survival in this disease remains >90%.
    Language English
    Publishing date 2024-03-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 340-2
    ISSN 1528-1140 ; 0003-4932
    ISSN (online) 1528-1140
    ISSN 0003-4932
    DOI 10.1097/SLA.0000000000006273
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top