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https://www.readbyqxmd.com/read/28644013/a-simple-approach-to-prepare-carboxycellulose-nanofibers-from-untreated-biomass
#1
Priyanka R Sharma, Ritika Joshi, Benjamin S Hsiao
A simple approach was developed to prepare carboxycellulose nanofibers directly from untreated biomass using nitric acid or nitric acid-sodium nitrite mixtures. Experiments indicated that this approach greatly reduced the need for multi-chemicals, and offered significant benefits in lowering the consumption of water and electric energy, when compared with conventional multiple-step processes at bench scale (e.g. TEMPO oxidation). Additionally, the effluent produced by this approach could be efficaciously neutralized using base to produce nitrogen-rich salts as fertilizers...
June 23, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28642202/engineering-of-multifunctional-temperature-sensitive-liposomes-for-synergistic-photothermal-photodynamic-and-chemotherapeutic-effects
#2
Tuan Hiep Tran, Hanh Thuy Nguyen, Nam Van Le, Thi Thu Phuong Tran, Jong Seong Lee, Sae Kwang Ku, Han-Gon Choi, Chul Soon Yong, Jong Oh Kim
Heterogeneity of cancer cells and drug resistance require multiple therapeutic approaches for comprehensive treatment. In this study, temperature-sensitive liposomes containing anti-cancer agent tanespimycin (17-AAG) and photosensitizer IR 820 were developed for combination of phototherapy and chemotherapy. The temperature-sensitive liposomes composed of DPPC, cholesterol, DSPE-PEG, 17-AAG, and IR 820 (LP-AI) at weight ratio of 35/15/3/2/2 were formulated as a thin film using extrusion and evaluated for particle size, morphology and drug release profile...
June 19, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28635584/the-patient-dignity-inventory-just-another-evaluation-tool-experiences-with-advanced-cancer-patients
#3
María Rullán, María Arantzamendi, Ana Carvajal, Marina Martínez, Amaia Saenz de Ormijana, Carlos Centeno
OBJECTIVE: The Patient Dignity Inventory (PDI) evaluates sources of distress related to the feeling of loss of dignity and was designed for patients at the end of life. The aim of the present work was to generate a better understanding of the experiences of healthcare staff when using the PDI. METHOD: An exploratory qualitative study is presented about the experience of 4 professionals who applied the PDI to 124 advanced-cancer patients. Our study consisted of an analysis of their experiences, taken from information generated in a focus group...
June 21, 2017: Palliative & Supportive Care
https://www.readbyqxmd.com/read/28629689/advanced-power-doppler-technique-increases-synovial-vascularity-detection-in-patients-with-rheumatoid-arthritis
#4
Davide Orlandi, Salvatore Gitto, Silvia Perugin Bernardi, Angelo Corazza, Luca De Flaviis, Enzo Silvestri, Marco Amedeo Cimmino, Luca Maria Sconfienza
We compared the diagnostic performance of an advanced power Doppler technique (superb microvascular imaging [SMI]) with that of power Doppler Imaging (PDI) and B-mode ultrasound (US) in patients with early rheumatoid arthritis (RA) and RA under treatment with rituximab. Thirty patients (21 women aged 45 ± 11 y) affected by RA with remission to moderate disease activity were examined. Both hand joints were evaluated using US, PDI and SMI. Two radiologists reviewed all video clips and evaluated synovial vascularity intensity using a semi-quantitative scoring system...
June 16, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28627806/improving-the-quantum-yields-of-perylene-diimide-aggregates-by-increasing-molecular-hydrophobicity-in-polar-media
#5
Jodi Szarko, Jürgen Plenge, Xiaoyu Xu, Ashli Austin, Steven Mylon
Here we report the quantum yield of four aggregated perylene diimide (PDI) species that vary by the length of the branched side chains attached at the N,N' imide positions. The PDI molecules were dissolved in binary water:methanol solvents as a means to vary the solvent polarity and control the degree of aggregation in solution. By performing spectroscopy, kinetics, and light scattering experiments, the nature of the molecular interactions in the solutions was determined. The maximum quantum yield of the aggregated molecules increased from 0...
June 19, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28625014/comparison-in-executive-function-in-chinese-preterm-and-full-term-infants-at-eight-months
#6
Yao Feng, Hong Zhou, Yan Zhang, Anthony Perkins, Yan Wang, Jing Sun
Executive function (EF) is increasingly recognized as being responsible for adverse developmental outcomes in preterm-born infants. Several perinatal factors may lead to poor EF development in infancy, and the deficits in EF can be identified in infants as young as eight months. A prospective cohort study was designed to study the EF in Chinese preterm infants and examine the relationship between EF in preterm infants and maternal factors during perinatal period. A total of 88 preterm infants and 88 full-term infants were followed from birth to eight months (corrected age)...
June 17, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28623698/single-component-solid-lipid-nanocarriers-prepared-with-ultra-long-chain-amphiphilic-lipids
#7
Wei Wei, Xiaonan Lu, Zegao Wang, Bianca Pérez, Jingying Liu, Chengyu Wu, Mingdong Dong, Fengqin Feng, Huiling Mu, Zheng Guo
HYPOTHESIS: Synthetic sugar alcohol mono-behenates with high melting points, surface activity and resistance to enzymatic lipolysis, are expected to form stable single-component solid lipid nanocarriers (SC-SLNs). The preparation methods and the polar head group of the molecules should affect the size and drug encapsulation efficiency. EXPERIMENTS: SC-SLNs of sugar alcohol mono-behenates with varied polar heads were prepared using emulsification-diffusion method and melting-probe sonication method...
June 7, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28622061/formulation-and-in-vitro-evaluation-of-curcumin-lactoferrin-conjugated-nanostructures-for-cancerous-cells
#8
Farkhondeh Chaharband, Golnaz Kamalinia, Fatemeh Atyabi, S Alireza Mortazavi, Zahra H Mirzaie, Rassoul Dinarvand
Curcumin, a natural polyphenol, exhibits anti-oxidant, anti-inflammatory, anti-neoplastic and chemopreventive properties. In fact, targeting of this natural anticancer agent has received a great deal of attention during the recent years. In this study, we proposed that curcumin conjugation with lactoferrin molecules may lead to a potential drug delivery system targeted toward cancerous cells through both active and passive targeting. In this regard, curcumin conjugated lactoferrin was developed via a carbodiimide-based coupling reaction and the resulting conjugates were appraised for their molecular properties as a potential targeted drug delivery system...
June 16, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28621282/radiographic-screening-of-patients-in-a-dental-school-using-the-prosthodontic-diagnostic-index
#9
Sharaz Shaik, Eman Alamodi, Ghaliah Alshahrani, Khalid H Alfaifi
INTRODUCTION: Organization of the findings associated with various diagnostic aids plays a key role in formulating the treatment plan of the patients undergoing dental and medical treatment. Enhanced consistency in diagnosing and classifying prosthodontic patients is the basic purpose of various classification systems. Hence, we planned this study to classify partially edentulous patients and completely dentate patients at the undergraduate clinics using the prosthodontic diagnostic index (PDI)...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28620763/anticancer-efficacy-of-self-nanoemulsifying-drug-delivery-system-of-sunitinib-malate
#10
Saad M Alshahrani, Abdullah S Alshetaili, Ahmed Alalaiwe, Bader B Alsulays, Md Khalid Anwer, Ramadan Al-Shdefat, Faisal Imam, Faiyaz Shakeel
Sunitinib malate (SM) is reported as a weakly soluble drug in water due to its poor dissolution rate and oral bioavailability. Hence, in the current study, various "self-nanoemulsifying drug delivery systems (SNEDDS)" of SM were prepared, characterized and evaluated for the enhancement of its in vitro dissolution rate and anticancer efficacy. On the basis of solubilization potential of SM in various excipients, "Lauroglycol-90 (oil), Triton-X100 (surfactant) and Transcutol-P (cosurfactant)" were selected for the preparation of SM SNEDDS...
June 15, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28619231/endoplasmic-reticulum-chaperones-tweak-the-mitochondrial-calcium-rheostat-to-control-metabolism-and-cell-death
#11
REVIEW
Tomas Gutiérrez, Thomas Simmen
The folding of secretory proteins is a well-understood mechanism, based on decades of research on endoplasmic reticulum (ER) chaperones. These chaperones interact with newly imported polypeptides close to the ER translocon. Classic examples for these proteins include the immunoglobulin binding protein (BiP/GRP78), and the lectins calnexin and calreticulin. Although not considered chaperones per se, the ER oxidoreductases of the protein disulfide isomerase (PDI) family complete the folding job by catalyzing the formation of disulfide bonds through cysteine oxidation...
May 31, 2017: Cell Calcium
https://www.readbyqxmd.com/read/28615305/prenatal-markers-and-longitudinal-follow-up-in-simple-and-complex-gastroschisis
#12
Annelieke Hijkoop, Hanneke IJsselstijn, René M H Wijnen, Dick Tibboel, Joost van Rosmalen, Titia E Cohen-Overbeek
OBJECTIVE: We aimed to identify gestational-age corrected prenatal ultrasound markers of complex gastroschisis, and to compare physical growth and neurodevelopment between children with simple and complex gastroschisis. DESIGN: We included prenatally diagnosed gastroschisis patients from 2000 to 2012 who joined our longitudinal follow-up programme. Associations between complex gastroschisis and prenatal ultrasound markers collected at 30 weeks' gestation and prior to delivery were tested using logistic regression...
June 14, 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/28614069/pegylated-lipid-bilayer-wrapped-nano-graphene-oxides-for-synergistic-co-delivery-of-doxorubicin-and-rapamycin-to-prevent-drug-resistance-in-cancers
#13
Raj Kumar Thapa, Jeong Hoon Byeon, Han-Gon Choi, Chul Soon Yong, Jong Oh Kim
Nano-graphene oxide (nGO) is a carbon allotrope studied for its potential as carrier for chemotherapeutic delivery and its photoablation effects. However, interaction of nGO with blood components and the subsequent toxicities warrant a hybrid system for effective cancer drug delivery. Combination chemotherapy aids in effective cancer treatment and prevention of drug resistance. Therefore, in this study, we attempted to prepare polyethylene glycosylated (PEGylated) lipid bilayer-wrapped nGO co-loaded with doxorubicin (DOX) and rapamycin (RAPA), GOLDR, for the prevention and treatment of resistant cancers...
June 14, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28613814/2-chloropropionamide-as-a-low-reactivity-electrophile-for-irreversible-small-molecule-probe-identification
#14
Dharmaraja Allimuthu, Drew J Adams
Resurgent interest in covalent target engagement in drug discovery has demonstrated that small molecules containing weakly reactive electrophiles can be safe and effective therapies. Several recently FDA-approved drugs feature an acrylamide functionality to selectively engage cysteine side chains of kinases (Ibrutinib, Afatinib, and Neratinib). Additional electrophilic functionalities whose reactivity is compatible with highly selective target engagement and in vivo application could open new avenues in covalent small molecule discovery...
June 14, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28612299/enhancement-of-photodynamic-inactivation-of-staphylococcus-aureus-biofilms-by-disruptive-strategies
#15
Lautaro Gándara, Leandro Mamone, Gabriela Cervini Bohm, Fernanda Buzzola, Adriana Casas
Photodynamic inactivation (PDI) has been used to inactivate microorganisms through the use of photosensitizers and visible light. On the one hand, near-infrared treatment (NIRT) has also bactericidal and dispersal effects on biofilms. In addition, dispersal biological tools such as enzymes have also been employed in antibiotic combination treatments. The aim of this work was to use alternative approaches to increase the PDI efficacy, employing combination therapies aimed at the partial disruption of the biofilms, thus potentially increasing photosensitizer or oxygen penetration and interaction with bacteria...
June 13, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28612072/efficient-energy-level-modification-of-novel-pyran-annulated-perylene-diimides-for-photocatalytic-water-splitting
#16
Ran Wang, Gang Li, Andong Zhang, Wen Wang, Guanwei Cui, Jianfeng Zhao, Zhiqiang Shi, Bo Tang
We design and synthesize four pyran-embedded perylene diimide (PDI) compounds through a straightforward methodology. UV-driven photocatalytic water splitting using the compounds as photocatalysts demonstrates that the highest photocatalytic H2 evolution rate under UV light is 0.90 mmol g(-1) h(-1), which paves the way towards organic photoresponsive materials.
June 22, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28610486/resveratrol-loaded-glycyrrhizic-acid-conjugated-human-serum-albumin-nanoparticles-wrapping-resveratrol-nanoparticles-preparation-characterization-and-targeting-effect-on-liver-tumors
#17
Mingfang Wu, Bolin Lian, Yiping Deng, Ziqi Feng, Chen Zhong, Weiwei Wu, Yannian Huang, Lingling Wang, Chang Zu, Xiuhua Zhao
In this study, glycyrrhizic acid-conjugated human serum albumin nanoparticles wrapping resveratrol nanoparticles were prepared to establish a tumor targeting nano-sized drug delivery system. Glycyrrhizic acid was coupled to human serum albumin, and resveratrol was encapsulated in glycyrrhizic acid-conjugated human serum albumin by high-pressure homogenization emulsification. The average particle size of sample nanoparticles prepared under the optimal conditions was 108.1 ± 5.3 nm with a polydispersity index (PDI) of 0...
January 1, 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/28608760/plga-peg-ra-based-polymeric-micelles-for-tumor-targeted-delivery-of-irinotecan
#18
Jaber Emami, Parnian Maghzi, Farshid Hasanzadeh, Hojjat Sadeghi, Mina Mirian, Mahboubeh Rostami
To develop an effective therapeutic treatment, the potential of poly (lactic-co-glycolic acid)-polyethylene glycol-retinoic acid (PLGA-PEG-RA) polymeric micelles for targeted delivery of irinotecan to hepatocellular carcinoma (HepG2) and colorectal cancer cell lines (HT-29) was evaluated. PLGA-PEG-RA was synthesized by amide reaction of PLGA with NH2-PEG-NH2 and then PLGA-PEG-NH2 with RA and confirmed by FTIR and (1)H NMR spectroscopy. Irinotecan-loaded nanomicelles were prepared using thin-film hydration method and the impact of various formulation variables on their particle size (PS), polydispersity index (PDI), zeta potential (ZP), entrapment efficiency (EE), and mean release time (MRT) were assessed using a Taguchi design...
June 13, 2017: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/28601996/risk-assessment-for-human-health-in-a-seleniferous-area-shuang-an-china
#19
Zewei Cui, Jie Huang, Qin Peng, Dasong Yu, Songshan Wang, Dongli Liang
Shuang'an in Ziyang is a typical high-selenium (Se) area in China, where human selenium (Se) poisoning was reported 30 years ago. To assess the risk of Se poisoning in the area, the Se content in agricultural soil, plant, and water in Naore, Shuang Hekou, and Lin Benhe villages of Ziyang was systematically investigated. The probable daily intake (PDI) was calculated on the basis of Se contents in food, water, and dietary habits to evaluate the risk of selenosis. Se content in hair from local habitants (32 men and 34 women) was determined to further verify the risk...
June 10, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28601649/gum-ghatti-mediated-one-pot-green-synthesis-of-optimized-gold-nanoparticles-investigation-of-process-variables-impact-using-box-behnken-based-statistical-design
#20
Md Sabir Alam, Arun Garg, Faheem Hyder Pottoo, Mohammad Khalid Saifullah, Abu Izneid Tareq, Ovais Manzoor, Mohd Mohsin, Md Noushad Javed
Due to unique inherent catalytic characteristics of different size, shape and surface functionalized Gold nanoparticles, their potential application is being explored in various fields such as drug delivery, biosensor, diagnosis and theranostics. However Conventional process for synthesis of these metallic nanoparticles utilizes toxic reagents as reducing agents, additional capping agent for stability as well as surface functionalization for drug delivery purposes. Hence, in this work suitability of Gum Ghatti for reducing, capping and surface functionalization during the synthesis of stable Gold nanoparticles were duly explored...
June 7, 2017: International Journal of Biological Macromolecules
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