keyword
MENU ▼
Read by QxMD icon Read
search

pharmaceutics

keyword
https://www.readbyqxmd.com/read/28432962/gc-ms-quantitative-analysis-of-black-market-pharmaceutical-products-containing-anabolic-androgenic-steroids-seized-by-the-brazilian-federal-police
#1
Diana Brito da Justa Neves, Eloisa Dutra Caldas
The use of counterfeit or substandard medicines can have an important health impact, resulting in therapeutic failure, be toxic or even cause death. Anabolic steroids are a frequent target for counterfeiters worldwide, being the second most frequent counterfeited class in Brazil. The aims of this work were to optimize and validate a GC-MS method for the quantitative determination of anabolic steroids in tablet, aqueous suspension and oil solution forms, and to analyze pharmaceutical products sent to Brazilian Federal Police (BFP) for forensic analysis...
April 5, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28432020/surface-modification-of-acetaminophen-particles-by-atomic-layer-deposition
#2
Tommi O Kääriäinen, Marianna Kemell, Marko Vehkamäki, Marja-Leena Kääriäinen, Alexandra Correia, Hélder A Santos, Luis M Bimbo, Jouni Hirvonen, Pekka Hoppu, Steven M George, David C Cameron, Mikko Ritala, Markku Leskelä
Active pharmaceutical ingredients (APIs) are predominantly organic solid powders. Due to their bulk properties many APIs require processing to improve pharmaceutical formulation and manufacturing in the preparation for various drug dosage forms. Improved powder flow and protection of the APIs are often anticipated characteristics in pharmaceutical manufacturing. In this work, we have modified acetaminophen particles with atomic layer deposition (ALD) by conformal nanometer scale coatings in a one-step coating process...
April 18, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28432018/on-the-role-of-api-in-determining-porosity-pore-structure-and-bulk-modulus-of-the-skeletal-material-in-pharmaceutical-tablets-formed-with-mcc-excipient
#3
Cathy Ridgway, Prince Bawuah, Daniel Markl, J Axel Zeitler, Jarkko Ketolainen, Kai-Erik Peiponen, Patrick Gane
The physical properties and mechanical integrity of pharmaceutical tablets are of major importance when loading with active pharmaceutical ingredient(s) (API) in order to ensure ease of processing, control of dosage and stability during transportation and handling prior to patient consumption. The interaction between API and excipient, acting as functional extender and binder, however, is little understood in this context. The API indomethacin is combined in this study with microcrystalline cellulose (MCC) at increasing loading levels...
April 18, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28431966/spray-drying-as-a-reliable-route-to-produce-metastable-carbamazepine-form-iv
#4
Rebecca A Halliwell, Rajni M Bhardwaj, Cameron Brown, Naomi E B Briggs, Jaclyn Dunn, John Robertson, Alison Nordon, Alastair J Florence
Carbamazepine is an active pharmaceutical ingredient used in the treatment of epilepsy that can form at least five polymorphic forms. Metastable form IV was originally discovered from crystallisation with polymer additives however has not been observed from subsequent solvent only crystallisation efforts. This work reports the reproducible formation of phase pure crystalline form IV by spray drying of methanolic carbamazepine solution. Characterisation of the material was carried out using diffraction, SEM and DSC...
April 18, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28431767/the-new-drug-conditional-approval-process-in-china-challenges-and-opportunities
#5
REVIEW
Xuefang Yao, Jinxi Ding, Yingfang Liu, Penghui Li
PURPOSE: Our aim was to characterize the newly established new drug conditional approval process in China and discuss the challenges and opportunities with respect to new drug research and development and registration. METHODS: We examined the new approval program through literature review, law analysis, and data analysis. Data were derived from published materials, such as journal articles, government publications, press releases, and news articles, along with statistical data from INSIGHT-China Pharma Databases, the China Food and Drug Administration website, the Center for Drug Evaluation website, the US Food and Drug Administration website, and search results published by Google...
April 18, 2017: Clinical Therapeutics
https://www.readbyqxmd.com/read/28431688/thermal-desorption-gas-chromatographic-methodology-for-the-determination-of-residual-solvents-in-mesoporous-silica
#6
Adissu Alemayehu Asfaw, Kris Wolfs, Ann Van Schepdael, Erwin Adams
In this work, thermal desorption-gas chromatography-flame ionization detection (TD-GC-FID) was adapted to enable the determination of residual solvents (RS) in mesoporous silica (MPSi). MPSi is often utilized in various pharmaceutical formulations or drug delivery systems and the accurate determination of RS is an important part of pharmaceutical quality control. Seven commonly used solvents (methanol, ethanol, acetone, isopropanol, dichloromethane, tetrahydrofuran and hexafluoroisopropanol) were evaluated in combination with 3 types of MPSi having pore sizes of 2-3, 15 and 25nm...
April 12, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28431483/bioassay-guided-isolation-identification-of-compounds-from-origanum-rotundifolium-and-investigation-of-their-antiproliferative-and-antioxidant-activities
#7
Ramazan Erenler, Bilal Meral, Ozkan Sen, Mahfuz Elmastas, Ali Aydin, Ozgur Eminagaoglu, Gulacti Topcu
CONTEXT: Origanum (Lamiaceae) has been used in food and pharmaceutical industries. OBJECTIVE: Isolation and identification of bioactive compounds from Origanum rotundifolium Boiss. and investigation of their antiproliferative and antioxidant activities. MATERIALS AND METHODS: The aerial part of O. rotundifolium was dried and powdered (1.0 kg ±2.0 g) then extracted with hexane, ethyl acetate, methanol and water. Solvent (3 × 1 L) was used for each extraction for a week at room temperature...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28431385/a-method-for-evaluating-the-pharmaceutical-deconjugation-potential-in-river-water-environments
#8
Takashi Azuma, Mao Ishida, Kanae Hisamatsu, Ayami Yunoki, Kana Otomo, Mari Kunitou, Mai Shimizu, Kaori Hosomaru, Shiori Mikata, Yoshiki Mino
A new enzymatic assay method that uses deconjugation enzymes was developed to evaluate the presence and extent of conjugated pharmaceuticals in the form of glucuronide conjugates or sulphate conjugates in river environments. First, acetaminophen glucuronide (Ace Glu) and acetaminophen sulphate (Ace Sul) were used as model conjugated pharmaceuticals to determine the appropriate combination of deconjugation enzymes and reaction conditions, including temperature, duration and pH. Next, we applied the defined method to 19 pharmaceuticals grouped into nine therapeutic classes that were chosen based on previously detected levels and frequencies in sewage and river water...
April 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/28431312/melatonin-charge-transfer-complex-with-2-3-dichloro-5-6-dicyano-1-4-benzoquinone-molecular-structure-dft-studies-thermal-analyses-evaluation-of-biological-activity-and-utility-for-determination-of-melatonin-in-pure-and-dosage-forms
#9
Gehad G Mohamed, Maher M Hamed, Nadia G Zaki, Mohamed M Abdou, Marwa El-Badry Mohamed, Abanoub Mosaad Abdallah
A simple, accurate and fast spectrophotometric method for the quantitative determination of melatonin (ML) drug in its pure and pharmaceutical forms was developed based on the formation of its charge transfer complex with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as an electron acceptor. The different conditions for this method were optimized accurately. The Lambert-Beer's law was found to be valid over the concentration range of 4-100μgmL(-1) ML. The solid form of the CT complex was structurally characterized by means of different spectral methods...
April 4, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28431213/genome-mining-unearths-a-hybrid-nonribosomal-peptide-synthetase-like-pteridine-synthase-biosynthetic-gene-cluster
#10
Hyun Bong Park, Corey E Perez, Karl W Barber, Jesse Rinehart, Jason M Crawford
Nonribosomal peptides represent a large class of metabolites with pharmaceutical relevance. Pteridines, such as pterins, folates, and flavins, are heterocyclic metabolites that often serve as redox-active cofactors. The biosynthetic machineries for construction of these distinct classes of small molecules operate independently in the cell. Here, we discovered an unprecedented nonribosomal peptide synthetase-like-pteridine synthase hybrid biosynthetic gene cluster in Photorhabdus luminescens using genome synteny analysis...
March 15, 2017: ELife
https://www.readbyqxmd.com/read/28431202/pharmacological-interventions-for-acute-pancreatitis
#11
REVIEW
Elisabetta Moggia, Rahul Koti, Ajay P Belgaumkar, Federico Fazio, Stephen P Pereira, Brian R Davidson, Kurinchi Selvan Gurusamy
BACKGROUND: In people with acute pancreatitis, it is unclear what the role should be for medical treatment as an addition to supportive care such as fluid and electrolyte balance and organ support in people with organ failure. OBJECTIVES: To assess the effects of different pharmacological interventions in people with acute pancreatitis. SEARCH METHODS: We searched the Cochrane Central Register of Controlled Trials (CENTRAL, 2016, Issue 9), MEDLINE, Embase, Science Citation Index Expanded, and trial registers to October 2016 to identify randomised controlled trials (RCTs)...
April 21, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28431040/prospective-assessment-of-pain-and-comfort-in-chronic-pain-patients-undergoing-interventional-pain-management-procedures
#12
Thomas Simopoulos, Daniel Leffler, Sheila Barnett, Devon Campbell, Shu Jing Lian, Jatinder S Gill
Objective.:  Interventional pain management procedures have an important role in the management of chronic pain. The present study seeks to identify the proportion of patients who experience severe pain during pain procedures either with or without sedation. There is then an attempt to identify any association of high pain levels with factors such as age, gender, ethnicity, preprocedure pain level, procedure type, tobacco use, and baseline pharmaceuticals taken for both pain and/or mood disorder management...
April 18, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28430547/enhancing-insights-into-pulmonary-vascular-disease-pvd-through-a-precision-medicine-approach-a-joint-nhlbi-cmref-workshop-report
#13
John H Newman, Stuart Rich, Steven H Abman, John H Alexander, John Barnard, Gerald J Beck, Raymond L Benza, Todd M Bull, Stephen Y Chan, Hyung J Chun, Declan Doogan, Jocelyn Dupuis, Serpil C Erzurum, Robert P Frantz, Mark Geraci, Hunter Gillies, Mark Gladwin, Michael P Gray, Anna R Hemnes, Roy S Herbst, Adrian F Hernandez, Nicholas S Hill, Evelyn M Horn, Kendall Hunter, Zhi-Cheng Jing, Roger Johns, Sanjay Kaul, Steven M Kawut, Tim Lahm, Jane A Leopold, Greg D Lewis, Stephen C Mathai, Vallerie V McLaughlin, Evangelos D Michelakis, Steven D Nathan, William Nichols, Grier Page, Marlene Rabinovitch, Jonathan Rich, Franz Rischard, Sharon Rounds, Sanjiv J Shah, Victor F Tapson, Naomi Lowy, Norman Stockbridge, Gail Weinmann, Lei Xiao
The Division of Lung Diseases of the National Heart, Lung and Blood Institute, (NHLBI) and the Cardiovascular Medical Education and Research Fund (CMREF), held a workshop to discuss to leverage of the anticipated scientific output from the recently launched "Redefining Pulmonary Hypertension (PH) through Pulmonary Vascular Disease Phenomics" (PVDOMICS) program. PVDOMICS is a protocol driven network to analyze PH patient populations to define novel pulmonary vascular disease (PVD) phenotypes. Basic, translational and clinical investigators, patient advocacy organizations, regulatory agencies, and pharmaceutical industry experts discussed the application of precision medicine to PVD clinical trials...
April 21, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28430453/ag-initiated-gem-difluoromethylenation-of-the-nitrogen-center-of-arenediazonium-salts-to-gem-difluoromethylene-azo-compounds
#14
Haizhen Jiang, Yunrong Chen, Bo Chen, Hui Xu, Wen Wan, Hongmei Deng, Kesen Ma, Shaoxiong Wu, Jian Hao
An efficient method for the synthesis of the thermally stable and pharmaceutically important gem-difluoromethylene azo compounds is developed. This protocol achieved gem-difluoromethylenation of the nitrogen center of arenediazonium salts through in situ generated benzo-1,3-diazolic difluoromethylene radical addition to arenediazonium salts under mild Ag-initiated conditions.
April 21, 2017: Organic Letters
https://www.readbyqxmd.com/read/28430440/insights-on-the-physical-state-reached-by-an-active-pharmaceutical-ingredient-upon-high-energy-milling
#15
Benjamin Schammé, Xavier Monnier, Nicolas Couvrat, Laurent Delbreilh, Valérie Dupray, Eric Dargent, Gérard Coquerel
In this article, we study the physicochemical transformations of crystalline Quinidine upon high-energy milling. The investigations have been achieved by classical, high performance and fast scanning calorimetry combined with broadband dielectric spectroscopy and X-ray powder diffraction. As evolution of crystalline Quinidine with time of milling revealed a prominent sub-Tg cold-crystallization phenomenon, independent and complementary analytical techniques were implemented. Fast scanning calorimetry was performed for the first time on a milled pharmaceutical compound to postpone the crystallization event to higher temperatures...
April 21, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28430363/cerebrolysin-for-acute-ischaemic-stroke
#16
REVIEW
Liliya Eugenevna Ziganshina, Tatyana Abakumova, Ludivine Vernay
BACKGROUND: Cerebrolysin is a mixture of low-molecular-weight peptides and amino acids derived from pigs' brain tissue, which has potential neuroprotective and neurotrophic properties. It is widely used in the treatment of acute ischaemic stroke in Russia, Eastern Europe, China, and other Asian and post-Soviet countries. OBJECTIVES: To assess the benefits and risks of cerebrolysin for treating acute ischaemic stroke. SEARCH METHODS: In May 2016 we searched the Cochrane Stroke Group Trials Register, CENTRAL, MEDLINE, Embase, Web of Science Core Collection, with Science Citation Index, LILACS, OpenGrey, and a number of Russian Databases...
April 21, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28430158/identification-of-tight-binding-plasmepsin-ii-and-falcipain-2-inhibitors-in-aqueous-extracts-of-marine-invertebrates-by-the-combination-of-enzymatic-and-interaction-based-assays
#17
Emir Salas-Sarduy, Yasel Guerra, Giovanni Covaleda Cortés, Francesc Xavier Avilés, María A Chávez Planes
Natural products from marine origin constitute a very promising and underexplored source of interesting compounds for modern biotechnological and pharmaceutical industries. However, their evaluation is quite challenging and requires specifically designed assays to reliably identify the compounds of interest in a highly heterogeneous and interfering context. In the present study, we describe a general strategy for the confident identification of tight-binding protease inhibitors in the aqueous extracts of 62 Cuban marine invertebrates, using Plasmodium falciparum hemoglobinases Plasmepsin II and Falcipain 2 as model enzymes...
April 21, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28429999/beneficial-effects-of-oral-supplementation-with-ovoderm-on-human-skin-physiology-two-pilot-studies
#18
Andrés Aguirre, Erena Gil-Quintana, Marisa Fenaux, Sandra Erdozain, Itziar Sarria
Collagens and hyaluronic acid have long been used in pharmaceuticals and food supplements for the improvement of skin elasticity and hydration. These compounds provide the building blocks of the skin. Ovoderm is an oral supplement obtained from eggshells that contains naturally occurring collagen and glycosaminoglycans, such as hyaluronic acid. We evaluated the efficacy of Ovoderm on skin biophysical parameters related to cutaneous aging such as elasticity, hydration, and pigmentation. Two pilot studies were run to assess the effect of daily oral supplementation with 300 mg Ovoderm on skin parameters...
April 21, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28429841/the-development-evidence-and-current-use-of-atx-101-for-the-treatment-of-submental-fat
#19
REVIEW
Corey Georgesen, Shari R Lipner
ATX-101 (deoxycholic acid) is the first pharmaceutical therapy approved by the FDA for the reduction in submental fat. Deoxycholic acid is an endogenous secondary bile acid that normally solubilizes dietary fat, contributing to its breakdown and absorption within the gut. This article reviews the identification of deoxycholic acid as a lipolytic agent, and the mechanism of action, pharmacokinetics, and pharmacodynamics of ATX-101. In addition to phase I/II trials, four Phase III clinical trials have evaluated safety and efficacy of ATX-101...
April 21, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/28429837/fluorescence-based-sensor-for-selective-and-sensitive-detection-of-amoxicillin-amox-in-aqueous-medium-application-to-pharmaceutical-and-biomedical-analysis
#20
Samadhan P Pawar, Laxman S Walekar, Dattatray B Gunjal, Dattatray K Dalavi, Anil H Gore, Prashant V Anbhule, Shivajirao R Patil, Govind B Kolekar
We here for the first time demonstrate an analytical approach for the highly selective and sensitive detection of amoxicillin (Amox) in aqueous medium based on the fluorescence quenching of quantum dots (QDs). The change in fluorescence intensity of mercaptopropionic acid-capped cadmium sulphide (MPA-CdS) QDs is attributed to the increasing concentration of Amox. The results show that the fluorescence quenching of QDs by Amox takes place through both static and dynamic types of quenching mechanism. The fluorescence quenching of QDs with increase in concentration of Amox shows the linear range between 5 μg ml(-1) and 30 μg ml(-1) and the limit of detection (LOD) is 5...
April 21, 2017: Luminescence: the Journal of Biological and Chemical Luminescence
keyword
keyword
28589
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"