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Tsenguun Byambadorj, Erfan Dashtimoghadam, Mohamadali Malakoutian, Benyamin Davaji, Lobat Tayebi, James E Richie, Chung Hoon Lee
We present a new thermomechanical method and a platform to measure the phase transition temperature at microscale. A thin film metal sensor on a membrane simultaneously measures both temperature and mechanical strain of the sample during heating and cooling cycles. This thermomechanical principle of operation is described in detail. Physical hydrogel samples are prepared as a disc-shaped gels (200 μm thick and 1 mm diameter) and placed between an on-chip heater and sensor devices. The sol-gel transition temperature of gelatin solution at various concentrations, used as a model physical hydrogel, shows less than 3% deviation from in-depth rheological results...
2017: PloS One
Philip J Weston, Deborah L Harris, Jane E Harding
BACKGROUND: Dextrose gel is increasingly used as first-line treatment for neonatal hypoglycaemia. Treatment with 400 mg/kg previously has been reported to impair subsequent feeding. We sought to determine if the recommended dose of 200 mg/kg altered feeding. METHODS: Hypoglycaemic babies were randomised to 200 mg/kg dextrose gel or placebo and fed. Prefeed alertness, quality and duration of breast feeding, and the volume of formula taken were assessed on the next feeding...
November 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
Joanne Elizabeth Hegarty, Jane Elizabeth Harding, Gregory David Gamble, Caroline Anne Crowther, Richard Edlin, Jane Marie Alsweiler
BACKGROUND: Neonatal hypoglycaemia is common, affecting up to 15% of newborns, and can cause brain damage. Currently, there are no strategies, beyond early feeding, to prevent neonatal hypoglycaemia. Our aim was to determine a dose of 40% oral dextrose gel that will prevent neonatal hypoglycaemia in newborn babies at risk. METHODS AND FINDINGS: We conducted a randomised, double-blind, placebo-controlled dose-finding trial of buccal dextrose gel to prevent neonatal hypoglycaemia at two hospitals in New Zealand...
October 2016: PLoS Medicine
Vibeke Strand, Sooyeol Lim, Junko Takamura
BACKGROUND: Gel-200 is a cross-linked hyaluronate single-injection device for treatment of osteoarthritis pain in the knee. This report summarizes new analyses of the safety of retreatment with Gel-200 from the 13-week, pivotal, multicenter, randomized controlled trial (RCT) followed by an open-label extension trial (OLE). METHODS: 379 patients were enrolled in the RCT [Gel-200; phosphate-buffered saline (PBS)]. Safety of retreatment with Gel-200 was assessed by comparing adverse events (AEs) and device-related AEs reported through Week 4 following retreatment with Gel-200 to those reported in patients receiving their first injection in the OLE...
June 1, 2016: BMC Musculoskeletal Disorders
Jan Krhut, Marie Navratilova, Radek Sykora, Michaela Jurakova, Marcel Gärtner, David Mika, Lubomir Pavliska, Peter Zvara
OBJECTIVE: It was hypothesized that increasing the time for which onabotulinum toxin A (OnabotA) is exposed to the urothelium following intravesical instillation will augment its effect. TC-3 is an inert heat-sensitive hydrogel, which creates an intravesical bulk providing a slow release of the embedded drug after instillation. The aim of this study was to evaluate the effect of OnabotA, embedded in inert TC-3 hydrogel, in patients with idiopathic overactive bladder (OAB). METHODS: In total, 39 female patients (age 30-65, average 53...
June 2016: Scandinavian Journal of Urology
Harsimran Kaur Malhi, Jenny Tu, Thomas V Riley, Sujith Prasad Kumarasinghe, Katherine A Hammer
BACKGROUND: The efficacy, tolerability and acceptability of a tea tree oil gel (200 mg/g) and face wash (7 mg/g) were evaluated for the treatment of mild to moderate facial acne. METHODS: In this open-label, uncontrolled phase II pilot study, participants applied tea tree oil products to the face twice daily for 12 weeks and were assessed after 4, 8 and 12 weeks. Efficacy was determined from total numbers of facial acne lesions and the investigator global assessment (IGA) score...
March 21, 2016: Australasian Journal of Dermatology
Jun Liu, Zhaodong Nan, Shengli Gao
Solvothermal methods have been widely used to synthesize different kinds of materials. However, only little is known about how precursor solutions react to form solid precipitates via this method. In the present study, in situ microcalorimetry is first used to investigate the formation mechanism under solvothermal conditions, where ZnFe2O4 synthesized using a solvothermal method was selected as the model sample. Some novel results are obtained, such as with the experimental temperature increase, (1) the homogeneous solution transforms to a gel containing amorphous Fe2(C2H4O2)3 and ZnC2H4O2, and NaNO3 crystals; (2) the gel dissolves; (3) α-(Fe,Zn)OOH and α-Fe2O3 are synthesized; (4) the α-(Fe,Zn)OOH transforms to α-Fe2O3; (5) Fe(2+) is formed at about 159 °C, which acts as a catalyst for the formation of Fe3O4; (6) the Fe3O4 crystals are synthesized at about 200 °C; (7) the Fe3O4 is transformed to the ZnFe2O4 with the help of NO3(-), and the reaction was kept at 200 °C for about 20 h...
October 21, 2015: Dalton Transactions: An International Journal of Inorganic Chemistry
Renata V Contri, Irene C Kulkamp-Guerreiro, Sheila Janine da Silva, Luiza A Frank, Adriana R Pohlmann, Silvia S Guterres
The rose-hip oil holds skin regenerating properties with applications in the dermatological and cosmetic area. Its nanoencapsulation might favor the oil stability and its incorporation into hydrophilic formulations, besides increasing the contact with the skin and prolonging its effect. The aim of the present investigation was to develop suitable rose-hip-oil-loaded nanocapsules, to verify the nanocapsule effect on the UV-induced oxidation of the oil and to obtain topical formulations by the incorporation of the nanocapsules into chitosan gel and film...
August 2016: AAPS PharmSciTech
Yunshui Jiang, Jianbo Li, Meng Gao, Jiao Ren, Sufeng Jin, Gang Chen, Jie Wu, Fangcheng Zhuang, Houwen Tian
HPV16 L2E7 is a fusion protein used for therapeutical vaccine targeting HPV virus. To increase its expression in Escherichia coli, we optimized the codon usage of HPV16 l2e7 gene based on its codon usage bias. The optimized gene of HPV16 sl2e7 was cloned into three different vectors: pGEX-5X-1, pQE30, ET41a, and expressed in JM109, JM109 (DE3) and BL21 (DE3) lines separately. A high expression line was selected with pET41a vector in BL21 (DE3) cells. After optimization of the growth condition, including inoculation amount, IPTG concentration, induction time and temperature, the expression level of HPV16 L2E7 was increased from less than 10% to about 28% of total protein...
April 2015: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
Guoqing Zhang, Jing Yang, Jiaji Shi, Shijun Qian, Yapeng Chao
The main commercial production of fructooligosaccharides (FOS) comes from enzymatic transformation using sucrose as substrate by microbial enzyme fructosyltransferase. A fructosyltransferase genomic DNA was isolated from Aspergillus niger QU10 by PCR. The nucleotide sequence showed a 1 941 bp size, and has been submitted to GenBank (KF699529). The cDNA of the fructosyltransferase, containing an open reading frame of 1 887 bp, was further cloned by RT-PCR. The fructosyltransferase gene from Aspergillus niger was functionally expressed both in Escherichia coli and Pichia pastoris GS 115...
April 2015: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
Jane E Harding, Joanne E Hegarty, Caroline A Crowther, Richard Edlin, Greg Gamble, Jane M Alsweiler
BACKGROUND: Neonatal hypoglycaemia is common, affecting up to 15% of newborn babies and 50% of those with risk factors (preterm, infant of a diabetic, high or low birthweight). Hypoglycaemia can cause brain damage and death, and babies born at risk have an increased risk of developmental delay in later life. Treatment of hypoglycaemia usually involves additional feeding, often with infant formula, and admission to Neonatal Intensive Care for intravenous dextrose. This can be costly and inhibit the establishment of breast feeding...
September 16, 2015: BMC Pediatrics
Marcela Rodriguez, Patrick G Hogan, Sarah W Satola, Emily Crispell, Todd Wylie, Hongyu Gao, Erica Sodergren, George M Weinstock, Carey-Ann D Burnham, Stephanie A Fritz
Historically, a number of typing methods have been evaluated for Staphylococcus aureus strain characterization. The emergence of contemporary strains of community-associated S. aureus, and the ensuing epidemic with a predominant strain type (USA300), necessitates re-evaluation of the discriminatory power of these typing methods for discerning molecular epidemiology and transmission dynamics, essential to investigations of hospital and community outbreaks. We compared the discriminatory index of 5 typing methods for contemporary S...
September 2015: Medicine (Baltimore)
Amin El-Heliebi, Shukun Chen, Thomas Kroneis
This chapter describes a simple and inexpensive multiplex PCR-based method to assess the quality of whole genome amplification (WGA) products generated from heat-induced random fragmented DNA. A set of four primer pairs is used to amplify DNA sequences of WGA products in and downstream of GAPDH gene in yielding 100, 200, 300, and 400 bp fragments. PCR products are analyzed by agarose gel electrophoresis and the respective WGA quality is classified according to the number of obtained PCR bands. WGA products that yield three or four PCR bands are considered to be of high quality and yield good results when analyzed by means of array comparative genome hybridization (CGH)...
2015: Methods in Molecular Biology
Bo Li, Rong Zhang, Lili Chen, Xutang Tao
A novel, facile and mild preparation route was proposed to synthesize well-crystallined potassium titanoniobate (KTiNbO5) powders with pure phase and mono-dispersed particle morphology. The preparation process mainly included a hydrothermal reaction under temperature of 200 degrees C, then following with a short time calcining at 500 degrees C. The utility of crystal seed during the hydrothermal process was essential and pivotal. Most importantly, only the crystal seed was prepared through a particular sol-gel process, was the desired KTiNbO5 particles successfully achieved...
June 2015: Journal of Nanoscience and Nanotechnology
Clayton Augusto Benevides, Frederico Duarte de Menezes, Renato E de Araujo
This work evaluated the fluorescent dye degradation indirectly induced by ionizing radiation with high energy photons (50 keV). Aqueous gels of agarose with low concentrations of Rhodamine 6G and Fluorescein were submitted to doses of x-ray radiation up to 200 Gy. The dye degradation was analyzed by fluorescence spectroscopy, using an excitation light-emitting diode with a peak wavelength of 462 nm. A rate equation model of fluorophores and radicals' species populations was developed to describe the degradation time behavior of the fluorescent solutions...
August 1, 2015: Applied Optics
Reyhan Polat, Gözde Bumin Aydin, Jülide Ergil, Murat Sayin, Tuğba Kokulu, İbrahim Öztürk
PURPOSE: The i-gel™ is one of the second generation supraglottic airway devices. Our study was designed to compare the i-gel and the Laryngeal Mask Airway Classic™ with respect to the clinical performance. METHODS: We compared the performance of the i-gel with that of the Laryngeal Mask Airway Classic in 120 patients undergoing urologic surgery during general anesthesia without muscle relaxant with respect to the number of attempts for successful insertion, insertion time, peak airway pressure, incidence of regurgitation, fiberoptic glottic view and postoperative complications...
September 2015: Revista Brasileira de Anestesiologia
I Ghiloufi, A S Al-Hobaib, L El Mir
Four partial carbonized nanoporous resins (PCNRs), based on organic xerogel compounds, were synthesised by the sol-gel method from pyrogallol and formaldehyde mixtures in water using picric acid as catalyst. The PCNRs were prepared at different pyrolysis temperatures: T(1) = 200 °C (PF-200), T(2) = 300 °C (PF-300), T(3) = 400 °C (PF-400), or T(4) = 500 °C (PF-500). The PCNRs were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transformed infrared spectroscopy, and nitrogen porosimetry...
2015: Water Science and Technology: a Journal of the International Association on Water Pollution Research
Oytip Nathalang, Kamphon Intharanut, Kanokpol Siriphanthong, Siriporn Nathalang, Pawinee Kupatawintu
BACKGROUND: Duffy (FY) blood group genotyping is important in transfusion medicine because Duffy alloantibodies are associated with delayed hemolytic transfusion reactions and hemolytic disease of the fetus and newborn. In this study, FY allele frequencies in Thai blood donors were determined by in-house PCR with sequence-specific primers (PCR-SSP), and the probability of obtaining compatible blood for alloimmunized patients was assessed. METHODS: Five hundred blood samples from Thai blood donors of the National Blood Centre, Thai Red Cross Society, were included...
November 2015: Annals of Laboratory Medicine
Reiko Yutani, Reiko Teraoka, Shuji Kitagawa
We examined the phase behavior of various polyoxyethylene sorbitan fatty acid ester (polysorbates)/ethanol/isopropyl myristate (IPM)/150 mM NaCl solution (NaClaq) systems in order to prepare a microemulsion containing a low ratio of ethanol, which is more suitable for in vivo application. Using polyoxyethylene sorbitan trioleate (Tween 85), which has a large lipophilic moiety, as a surfactant component, single-phase domain of the phase diagram was the largest of all the polysorbates examined, and in particular a large oil-rich single-phase domain was obtained...
2015: Chemical & Pharmaceutical Bulletin
Anna Wrzosek, Jaroslaw Woron, Jan Dobrogowski, Joanna Jakowicka-Wordliczek, Jerzy Wordliczek
BACKGROUND: Clonidine is a presynaptic alpha-2-adrenergic receptor agonist used for many years to treat hypertension and other conditions, including chronic pain. Adverse events associated with systemic use of the drug have limited its application. Topical use of drugs is currently gaining interest, as it may limit adverse events without loss of analgesic efficacy. Topical clonidine (TC) formulations have been investigated recently in clinical trials. OBJECTIVES: The objectives of this review were to assess the analgesic efficacy of TC for chronic neuropathic pain in adults and to assess the frequency of adverse events associated with clinical use of TC for chronic neuropathic pain...
2015: Cochrane Database of Systematic Reviews
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