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https://www.readbyqxmd.com/read/27914794/modeling-the-secondary-drying-stage-of-freeze-drying-development-and-validation-of-an-excel-based-model
#1
Ekneet K Sahni, Michael J Pikal
Although several mathematical models of primary drying have been developed over the years, with significant impact on the efficiency of process design, models of secondary drying have been confined to highly complex models. The simple-to-use Excel-based model developed here is, in essence, a series of steady state calculations of heat and mass transfer in the 2 halves of the dry layer where drying time is divided into a large number of time steps, where in each time step steady state conditions prevail. Water desorption isotherm and mass transfer coefficient data are required...
November 30, 2016: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27891475/self-reported-obstacles-to-regular-dental-care-among-information-technology-professionals
#2
L Swetha Reddy, Dolar Doshi, B Srikanth Reddy, Suhas Kulkarni, M Padma Reddy, D Satyanarayana, Pavan Baldava
INTRODUCTION: Good oral health is important for an individual as well as social well-being. Occupational stress and work exhaustion in Information Technology (IT) professionals may influence the oral health and oral health related quality of life. AIM: To assess and compare self-reported obstacles for regular dental care and dental visits among IT professionals based on age, gender, dental insurance and working days per week. MATERIALS AND METHODS: A cross-sectional study was conducted among 1,017 IT professionals to assess the self-reported obstacles to regular oral health care in Hyderabad city, Telangana, India...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27890244/development-and-optimization-of-a-wet-granulation-process-at-elevated-temperature-for-a-poorly-compactible-drug-using-twin-screw-extruder-for-continuous-manufacturing
#3
Anuprabha K Meena, Divyakant Desai, Abu T M Serajuddin
The objective of this study was to enhance tabletability of a poorly compactible drug, acetaminophen, by wet granulation using twin screw extruder at high temperature. It was desired that there would be minimum amounts of excipients used and the granules obtained after extrusion would be dry and fall within a size range suitable for tableting without any further processing. Mixtures of acetaminophen (95%) with binders (5% povidone or partially pregelatinized starch) were wet granulated through twin screw extruder at 70°C by adding 7% w/w water...
November 24, 2016: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27886384/valorization-of-functional-properties-of-extract-and-powder-of-olive-leaves-in-raw-and-cooked-minced-beef-meat
#4
Fathia Aouidi, Aicha Okba, Moktar Hamdi
BACKGROUND: Olive leaves (OL), resulting with a huge amount from pruning, were known to be a useful source for biologically active compounds. This paper investigates the potential application of OL as a supplement to minced beef meat, in order to develop a functional product. The effect of OL extract or powder (100, 150 µg phenols g(-1) of meat) on quality and stability of raw and cooked meat, during refrigerated storage, was examined. RESULTS: Microwave drying at 600w gave OL with the highest antioxidant quality (evaluated by TEACphenols and by DPPHphenols , compared to other methods...
November 25, 2016: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/27885658/early-skin-to-skin-contact-for-mothers-and-their-healthy-newborn-infants
#5
REVIEW
Elizabeth R Moore, Nils Bergman, Gene C Anderson, Nancy Medley
BACKGROUND: Mother-infant separation post birth is common. In standard hospital care, newborn infants are held wrapped or dressed in their mother's arms, placed in open cribs or under radiant warmers. Skin-to-skin contact (SSC) begins ideally at birth and should last continually until the end of the first breastfeeding. SSC involves placing the dried, naked baby prone on the mother's bare chest, often covered with a warm blanket. According to mammalian neuroscience, the intimate contact inherent in this place (habitat) evokes neuro-behaviors ensuring fulfillment of basic biological needs...
November 25, 2016: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/27883912/development-of-potential-candidate-reference-materials-for-drugs-in-bottom-sediment-cod-and-herring-tissues
#6
Irena Baranowska, Bogusław Buszewski, Jacek Namieśnik, Piotr Konieczka, Sylwia Magiera, Halina Polkowska-Motrenko, Paweł Kościelniak, Renata Gadzała-Kopciuch, Aneta Woźniakiewicz, Zbigniew Samczyński, Kinga Kochańska, Małgorzata Rutkowska
Regular use of a reference material and participation in a proficiency testing program can improve the reliability of analytical data. This paper presents the preparation of candidate reference materials for the drugs metoprolol, propranolol, carbamazepine, naproxen, and acenocoumarol in freshwater bottom sediment and cod and herring tissues. These reference materials are not available commercially. Drugs (between 7 ng/g and 32 ng/g) were added to the samples, and the spiked samples were freeze-dried, pulverized, sieved, homogenized, bottled, and sterilized by γ-irradiation to prepare the candidate materials...
November 21, 2016: Chemosphere
https://www.readbyqxmd.com/read/27881165/comparative-analysis-of-four-terpenoids-in-root-and-cortex-of-tripterygium-wilfordii-radix-by-different-drying-methods
#7
Tuanjie Wang, Fei Shen, Shulan Su, Yongliang Bai, Sheng Guo, Hui Yan, Tao Ji, Yanyan Wang, Dawei Qian, Jin-Ao Duan
BACKGROUND: Tripterygium wilfordii Radix, a well-known traditional medicine in china which is used for treatment of inflammation, pain, tumor and immune regulation for centuries in china, accompany with the serious toxic side effects. This study was carried out for simultaneously analyzing the four main components (triptolide, triptophenolide, demethylzeylasteral and celastrol) in Tripterygium wilfordii Radix under different drying processes, which was important for reducing the toxicity and quality control of Tripterygium wilfordii Radix in future...
November 23, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27880871/spray-dried-nanocrystals-for-a-highly-hydrophobic-drug-increased-drug-loading-enhanced-redispersity-and-improved-oral-bioavailability
#8
Yanxian Hou, Jingbo Shao, Qiang Fu, Jingru Li, Jin Sun, Zhonggui He
For a highly hydrophobic and drug, it is difficult to formulate and solidify its nanocrystals with high drug loading and good redispersity. In this study, Allisartan Isoproxil was used as a model drug, and SDS was tested in combination with sugar alcohols to improve the drug loading and redispersity for its spray-dried nanocrystals, simultaneously. These spray-dried nanocrystals had high drug loading of 61.7% and good redispersity, which was mainly attributed to the addition of SDS. In addition, the nanocrystals were characterized by scanning electron microscopy, differential scanning calorimetry, X-ray power diffraction analysis, Fourier transform infrared spectroscopy and Raman spectroscopy...
November 20, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27880032/zeolite-based-dry-formulations-for-conservation-and-practical-application-of-paraburkholderia-phytofirmans-psjn
#9
Teresa Berninger, Birgit Mitter, Claudia Preininger
AIM: Producing dry, zeolite-based granular and powder inoculants of the Gram negative, plant growth-promoting bacterium Paraburkholderia phytofirmans PsJN. Key aspects were maintenance of cell viability during desiccation and throughout storage at ambient conditions. METHODS AND RESULTS: 20 additives and exopolysaccharide (EPS) produced by PsJN were screened for conserving cell viability of PsJN in air drying and lyophilization. Suitable combinations (e.g. skimmed milk + air drying) increased survival of PsJN up to 100,000-fold and maintained it for > seven months...
November 23, 2016: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/27879014/highly-efficient-reusable-sponge-type-catalyst-carriers-based-on-short-electrospun-fibers
#10
Gaigai Duan, Melissa Koehn-Serrano, Andreas Greiner
This study reports on gold nanoparticles (AuNPs) immobilized in a sponge made of short electrospun fibers (Au-sponge), which show surprisingly high reaction rates at extremely low gold amount. Au-sponges are made by freeze-drying of dispersions of short electrospun fibers with preimmobilization of AuNPs. The resulting Au-sponges show very low densities around 7 mg cm(-3) corresponding to a pore volume of about 150 mL g(-1) , but low surface area and very low amount of AuNPs in the range of 0.29-3.56 wt%. In general, catalysts with immobilized AuNPs show much low reaction rates compared to systems with dispersed AuNPs...
November 23, 2016: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/27873181/inhalable-ipratropium-bromide-particle-engineering-with-multicriteria-optimization
#11
Bhavani Prasad Vinjamuri, Rahul V Haware, William C Stagner
Spray-dried ipratropium bromide (IPB) microspheres for oral inhalation were engineered using Quality by Design. The interrogation of material properties, process parameters, and critical product quality attributes interplay enabled rational product design. A 2(7-3) screening design exhibited the Maillard reaction between L-leucine (LL) and lactose at studied outlet temperatures (OT) >130°C. A response surface custom design was used in conjunction with multicriteria optimization to determine the operating design space to achieve inhalable microparticles...
November 21, 2016: AAPS PharmSciTech
https://www.readbyqxmd.com/read/27866769/modular-virus-like-particles-for-sublingual-vaccination-against-group-a-streptococcus
#12
Arjun Seth, Il Gyu Kong, Su-Hyun Lee, Jin-Young Yang, Yong-Soo Lee, Yeji Kim, Nani Wibowo, Anton P J Middelberg, Linda H L Lua, Mi-Na Kweon
Infection with Group A streptococcus (GAS)-an oropharyngeal pathogen-leads to mortality and morbidity, primarily among developing countries and indigenous populations in developed countries. The development of safe and affordable GAS vaccines is challenging, due to the presence of various unique GAS serotypes, antigenic variation within the same serotype, and potential auto-immune responses. In the present study, we evaluated the use of a sublingual freeze-dried (FD) formulation based on immunogenic modular virus-like particles (VLPs) carrying the J8 peptide (J8-VLPs) as a potential safe and cost-effective GAS vaccine for inducing protective systemic and mucosal immunity...
December 12, 2016: Vaccine
https://www.readbyqxmd.com/read/27865620/consumption-of-chokeberry-aronia-mitschurinii-products-modestly-lowered-blood-pressure-and-reduced-low-grade-inflammation-in-patients-with-mildly-elevated-blood-pressure
#13
Britt-Marie Loo, Iris Erlund, Raika Koli, Pauli Puukka, Jarkko Hellström, Kristiina Wähälä, Pirjo Mattila, Antti Jula
Previous studies suggest that consumption of chokeberries may improve cardiovascular disease risk factor profiles. We hypothesized that chokeberries (Aronia mitschurinii) have beneficial effects on blood pressure, low-grade inflammation, serum lipids, serum glucose, and platelet aggregation in patients with untreated mild hypertension. A total of 38 participants were enrolled into a 16-week single blinded crossover trial. The participants were randomized to use cold-pressed 100% chokeberry juice (300 mL/d) and oven-dried chokeberry powder (3 g/d), or matched placebo products in random order for 8 weeks each with no washout period...
September 14, 2016: Nutrition Research
https://www.readbyqxmd.com/read/27856164/paper-based-maskless-enzymatic-sensor-for-glucose-determination-combining-ink-and-wire-electrodes
#14
O Amor-Gutiérrez, E Costa Rama, A Costa-García, M T Fernández-Abedul
In this work we have developed an amperometric enzymatic biosensor in a paper-based platform with a mixed electrode configuration: carbon ink for the working electrode (WE) and metal wires (from a low-cost standard electronic connection) for reference (RE) and auxiliary electrodes (AE). A hydrophobic wax-defined paper area was impregnated with diluted carbon ink. Three gold-plated pins of the standard connection are employed, one for connecting the WE and the other two acting as RE and AE. The standard connection works as a clip in order to support the paper in between...
November 6, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27852328/a-pilot-program-of-knowledge-translation-and-implementation-for-newborn-resuscitation-using-us-peace-corps-volunteers-in-rural-madagascar
#15
Kristin Close, Michele Karel, Michelle White
BACKGROUND: Prevention of adverse perinatal outcome using the Helping Babies Breathe (HBB) neonatal resuscitation algorithm can reduce perinatal mortality in low income settings. Mercy Ships is a non-governmental organisation providing free healthcare education in sub-Saharan Africa and in an attempt to reach more rural areas of Madagascar with our neonatal resuscitation training we designed a novel approach in collaboration with US Peace Corps Volunteers (PCV). PCVs work in rural areas and contribute to locally determined public health initiatives...
November 16, 2016: Globalization and Health
https://www.readbyqxmd.com/read/27834642/magnetic-particle-imaging-a-resovist-based-marking-technology-for-guide-wires-and-catheters-for-vascular-interventions
#16
Julian Haegele, Nikolaos Panagiotopoulos, Sjef Cremers, Ju Rgen Rahmer, Jochen Franke, Robert L Duschka, Sarah Vaalma, Michael Heidenreich, Jo Rn Borgert, Paul Borm, Jo Rg Barkhausen, Florian M Vogt
Magnetic particle imaging (MPI) is able to provide high temporal and good spatial resolution, high signal to noise ratio and sensitivity. Furthermore, it is a truly quantitative method as its signal strength is proportional to the concentration of its tracer, superparamagnetic iron oxide nanoparticles (SPIOs), over a wide range practically relevant concentrations. Thus, MPI is proposed as a promising future method for guidance of vascular interventions. To implement this, devices such as guide wires and catheters have to be discernible in MPI, which can be achieved by coating already commercially available devices with SPIOs...
October 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/27822898/optimization-of-air-blast-drying-process-for-manufacturing-saccharomyces-cerevisiae-and-non-saccharomyces-yeast-as-industrial-wine-starters
#17
Sae-Byuk Lee, Won-Seok Choi, Hyun-Jung Jo, Soo-Hwan Yeo, Heui-Dong Park
Wine yeast (Saccharomyces cerevisiae D8) and non-Saccharomyces wine yeasts (Hanseniaspora uvarum S6 and Issatchenkia orientalis KMBL5774) were studied using air-blast drying instead of the conventional drying methods (such as freeze and spray drying). Skim milk-a widely used protective agent-was used and in all strains, the highest viabilities following air-blast drying were obtained using 10% skim milk. Four excipients (wheat flour, nuruk, artichoke powder, and lactomil) were evaluated as protective agents for yeast strains during air-blast drying...
December 2016: AMB Express
https://www.readbyqxmd.com/read/27816556/aflatoxin-b1-lysine-adduct-in-dried-blood-spot-samples-of-animals-and-humans
#18
Kathy S Xue, Wenjie Cai, Lili Tang, Jia-Sheng Wang
Dried blood spots (DBS) were proposed as potentially viable method for exposure assessment of environmental toxicants in infant and young children. For this study, we validated an experimental protocol to quantify AFB1-lysine adduct in DBS samples of AFB1-treated F344 rats, as well as samples from human field study. Significant dose-response relationships in AFB1-lysine adduct formation were found in DBS samples of rats treated with single- and repeated-dose AFB1. AFB1-lysine levels in DBS samples were highly correlated with corresponding serum sample levels...
November 2, 2016: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/27810511/modeling-the-evaporation-of-sessile-multi-component-droplets
#19
C Diddens, J G M Kuerten, C W M van der Geld, H M A Wijshoff
We extended a mathematical model for the drying of sessile droplets, based on the lubrication approximation, to binary mixture droplets. This extension is relevant for e.g. inkjet printing applications, where ink consisting of several components are used. The extension involves the generalization of an established vapor diffusion-limited evaporation model to multi-component mixtures. The different volatilities of the liquid components generate a composition gradient at the liquid-air interface. The model takes the composition-dependence of the mass density, viscosity, surface tension, mutual diffusion coefficient and thermodynamic activities into account...
October 20, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27793679/effect-of-crosslinking-functionality-on-microstructure-mechanical-properties-and-in-vitro-cytocompatibility-of-cellulose-nanocrystals-reinforced-poly-vinyl-alcohol-sodium-alginate-hybrid-scaffolds
#20
Anuj Kumar, Yujin Lee, Doyeon Kim, Kummara Madhusudana Rao, Jisoo Kim, Soyoung Park, Adnan Haider, Do Hyun Lee, Sung Soo Han
Cellulose nanocrystals reinforced poly (vinyl alcohol)/sodium alginate hybrid scaffolds were fabricated by using freeze casting and freeze drying method. In this study, the effect of crosslinking agents such as calcium chloride, orthophosphoric acid, and borax on morphological, structural, thermal, mechanical, and cytocompatibility (cell adhesion and proliferation) properties was investigated. The results showed that the change in type of crosslinking agent significantly changed the properties of the hybrid scaffolds...
October 25, 2016: International Journal of Biological Macromolecules
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