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https://www.readbyqxmd.com/read/28721721/unveil-the-concentration-dependent-grain-growth-of-perovskite-films-from-one-step-and-two-step-deposition-methods-implications-for-photovoltaic-application
#1
Alison E Lewis, Yi Zhang, Peng Gao, Mohammad Khaja Nazeeruddin
In order to achieve high efficiency perovskite solar cells, understanding both the crystal structure and the opto-electronic properties of perovskite layers are of importance. This paper uses crystallization analysis and modelling study of two different perovskites deposition methods (two-step and one-step methods) and thereby shows that the one-step method embodies a film formation process that is dominated by crystal growth, while the dominant mechanism of the two-step procedure is nucleation. Our data based on the experimental and the theory shows that the one-step recipe is superior in terms of morphology control and hence the reproducibility compared to the two-step recipe...
July 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28721719/imprinted-nanovelcro-microchips-for-isolation-and-characterization-of-circulating-fetal-trophoblasts-toward-noninvasive-prenatal-diagnostics
#2
Shuang Hou, Jie-Fu Chen, Min Song, Yazhen Zhu, Yu Jen Jan, Szu Hao Chen, Tzu-Hua Weng, Dean-An Ling, Shang-Fu Chen, Tracy Ro, An-Jou Liang, Tom Lee, Helen Jin, Man Li, Lian Liu, Yu-Sheng Hsiao, Peilin Chen, Hsiao-Hua Yu, Ming-Song Tsai, Margareta D Pisarska, Angela Chen, Li-Ching Chen, Hsian-Rong Tseng
Circulating fetal nucleated cells (CFNCs) in maternal blood offer an ideal source of fetal genomic DNA for noninvasive prenatal diagnostics (NIPD). We developed a class of nanoVelcro microchips to effectively enrich a subcategory of CFNCs, i.e., circulating trophoblasts (cTBs) from maternal blood, which can then be isolated with single-cell resolution by a laser capture microdissection (LCM) technique for downstream genetic testing. We first established a nanoimprinting fabrication process to prepare the LCM-compatible nanoVelcro substrates...
July 19, 2017: ACS Nano
https://www.readbyqxmd.com/read/28720660/an-amish-founder-mutation-disrupts-a-pi-3-p-whamm-arp2-3-complex-driven-autophagosome-remodeling-pathway
#3
Alyssa J Mathiowetz, Emma Baple, Ashley J Russo, Alyssa M Coulter, Eric Carrano, Judith D Brown, Robert N Jinks, Andrew H Crosby, Kenneth G Campellone
Actin nucleation factors function to organize, shape, and move membrane-bound organelles, yet they remain poorly defined in relation to disease. Galloway-Mowat syndrome (GMS) is an inherited disorder characterized by microcephaly and nephrosis resulting from mutations in the WDR73 gene. This core clinical phenotype appears frequently in the Amish, where virtually all affected individuals harbor homozygous founder mutations in WDR73 as well as the closely linked WHAMM gene, which encodes a nucleation factor...
July 18, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28720569/platelets-as-autonomous-drones-for-hemostatic-and-immune-surveillance
#4
REVIEW
Jackson LiangYao Li, Alexander Zarbock, Andrés Hidalgo
Platelets participate in many important physiological processes, including hemostasis and immunity. However, despite their broad participation in these evolutionarily critical roles, the anucleate platelet is uniquely mammalian. In contrast with the large nucleated equivalents in lower vertebrates, we find that the design template for the evolutionary specialization of platelets shares remarkable similarities with human-engineered unmanned aerial vehicles in terms of overall autonomy, maneuverability, and expendability...
July 18, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28719969/dmf-as-an-additive-in-two-step-spin-coating-method-for-20-conversion-efficiency-perovskite-solar-cells
#5
Jionghua Wu, Xin Xu, Yanhong Zhao, Jiangjian Shi, Yuzhuan Xu, Yanhong Luo, Dongmei Li, Huijue Wu, Qingbo Meng
DMF as additive has been employed in FAI/MAI/IPA (FA= CH2 (NH2)2, MA=CH3NH3, IPA is isopropanol) solution for two-step multi-cycle spin coating method in order to prepare high quality FAxMA1-xPbI2.55Br0.45 perovskite films. Further investigation reveals that the existence of DMF in the FAI/MAI/IPA solution can facilitate perovskite conversion, improve the film morphology and reduce crystal defects, thus enhance charge transfer efficiency. By optimization toward the DMF amount and spin coating cycles, compact, pinhole-free perovskite films are obtained...
July 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28719093/bone-marrow-harvest-from-unrelated-donors-up-to-date-methodology
#6
Katarzyna Pruszczyk, Kamila Skwierawska, Małgorzata Król, Albert Moskowicz, Dariusz Jabłoński, Tigran Torosian, Iwona Piotrowska, Elżbieta Urbanowska, Wiesław Wiktor-Jędrzejczak, Emilian Snarski
OBJECTIVES: Bone marrow harvesting is one of the essential sources of stem cells for hematopoietic stem cell transplantation. We describe here the current "up to date" standard of the bone marrow harvest in unrelated stem cell donors. METHODS: We analyzed medical data of 187 unrelated hematopoietic stem cell donors who underwent bone marrow harvest without previous peripheral blood stem collection at the center between 2011 and 2015. The methodology of marrow collection includes multiple cells aimed at safety of the procedure e...
July 18, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28716596/quality-comparison-of-umbilical-cord-blood-cryopreserved-with-conventional-versus-automated-systems
#7
Kyeong Mi Kim, Ji Young Huh, Jin Ju Kim, Myung Seo Kang
Umbilical cord blood (CB) banks usually freeze and store CB for clinical transplantation using conventional controlled-rate freezer or the automated BioArchive system. The aim of this study is to compare the quality of CB cryopreserved with conventional and automated methods and to make clear the cause of the quality difference between the two methods. The experiment used 80 CB units: 40 were conventionally cryopreserved and the remainder were cryopreserved with a BioArchive. After thawing, the following measures of CB quality were compared: recovery rates of cell count, cell viability of total nucleated cells (TNCs), mononuclear cells (MNCs), and CD34+ cells, as well as colony-forming unit-granulocyte/macrophage (CFU-GM) content...
July 14, 2017: Cryobiology
https://www.readbyqxmd.com/read/28716301/discrete-%C3%AE-adrenergic-mechanisms-regulate-early-and-late-erythropoiesis-in-erythropoietin-resistant-anemia
#8
Shirin Hasan, Michael J Mosier, Andrea Szilagyi, Richard L Gamelli, Kuzhali Muthumalaiappan
BACKGROUND: Anemia of critical illness is resistant to exogenous erythropoietin. Packed red blood cells transfusions is the only treatment option, and despite related cost and morbidity, there is a need for alternate strategies. Erythrocyte development can be divided into erythropoietin-dependent and erythropoietin-independent stages. We have shown previously that erythropoietin-dependent development is intact in burn patients and the erythropoietin-independent early commitment stage, which is regulated by β1/β2-adrenergic mechanisms, is compromised...
July 14, 2017: Surgery
https://www.readbyqxmd.com/read/28715637/unit-cell-level-thickness-control-of-single-crystalline-zinc-oxide-nanosheets-enabled-by-electrical-double-layer-confinement
#9
Xin Yin, Yeqi Shi, Yanbing Wei, Yongho Joo, Padma Gopalan, Izabela Szlufarska, Xudong Wang
Ionic layer epitaxy (ILE) has recently been developed as an effective strategy to synthesize nanometer-thick 2D materials with a non-layered crystal structure, such as ZnO. The packing density of the amphiphilic monolayer is believed to be a key parameter that controls the nanosheet nucleation and growth. In this work, we systematically investigated the growth behavior of single-crystalline ZnO nanosheets templated at the water-air interface by an anionic oleylsulfate monolayer with different packing densities...
July 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28713606/autologous-concentrated-bone-marrow-grafting-for-the-treatment-of-osteonecrosis-of-the-humeral-head-a-report-of-five-shoulders-in-four-cases
#10
Takeshi Makihara, Tomokazu Yoshioka, Hisashi Sugaya, Masashi Yamazaki, Hajime Mishima
Five shoulders in four patients affected by advanced osteonecrosis of the humeral head were treated with autologous concentrated bone marrow grafting. Bone marrow sample was aspirated from the iliac crests, concentrated by a centrifugation technique, and injected into the necrotic site. The shoulders were evaluated radiologically with X-ray scoring and clinically with measurement of range of motion and pain score (visual analogue scale, VAS). The mean follow-up period was 49.4 (range, 24-73) months. The concentration ratio of nucleated cells was calculated and the number of transplanted mesenchymal stem cells (MSC) was estimated by a colony-forming assay...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28702523/implications-of-peptide-assemblies-in-amyloid-diseases
#11
REVIEW
Pu Chun Ke, Marc-Antonie Sani, Feng Ding, Aleksandr Kakinen, Ibrahim Javed, Frances Separovic, Thomas P Davis, Raffaele Mezzenga
Neurodegenerative disorders and type 2 diabetes are global epidemics compromising the quality of life of millions worldwide, with profound social and economic implications. Despite the significant differences in pathology - much of which are poorly understood - these diseases are commonly characterized by the presence of cross-β amyloid fibrils as well as the loss of neuronal or pancreatic β-cells. In this review, we document research progress on the molecular and mesoscopic self-assembly of amyloid-beta, alpha synuclein, human islet amyloid polypeptide and prions, the peptides and proteins associated with Alzheimer's, Parkinson's, type 2 diabetes and prion diseases...
July 12, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28702128/a-novel-host-factor-for-human-respiratory-syncytial-virus
#12
COMMENT
Masfique Mehedi, Peter L Collins, Ursula J Buchholz
Human respiratory syncytial virus (RSV) is the leading viral cause of severe lower respiratory disease in young children worldwide. As part of a genome-wide siRNA screen, we recently discovered that actin-related protein 2 (ARP2) is a host factor in the RSV replication cycle. ARP2 is a major constituent of the ARP2/3 complex, which catalyzes actin polymerization involved in cell morphology and motility. In the course of investigating this finding, we also found that RSV infection of human lung epithelial A459 cells induced filopodia formation and stimulated cell motility...
2017: Communicative & Integrative Biology
https://www.readbyqxmd.com/read/28701771/myosin-1b-and-f-actin-are-involved-in-the-control-of-secretory-granule-biogenesis
#13
Charlène Delestre-Delacour, Ophélie Carmon, Fanny Laguerre, Catherine Estay-Ahumada, Maïté Courel, Salah Elias, Lydie Jeandel, Margarita Villar Rayo, Juan R Peinado, Lucie Sengmanivong, Stéphane Gasman, Evelyne Coudrier, Youssef Anouar, Maité Montero-Hadjadje
Hormone secretion relies on secretory granules which store hormones in endocrine cells and release them upon cell stimulation. The molecular events leading to hormone sorting and secretory granule formation at the level of the TGN are still elusive. Our proteomic analysis of purified whole secretory granules or secretory granule membranes uncovered their association with the actomyosin components myosin 1b, actin and the actin nucleation complex Arp2/3. We found that myosin 1b controls the formation of secretory granules and the associated regulated secretion in both neuroendocrine cells and chromogranin A-expressing COS7 cells used as a simplified model of induced secretion...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28700939/neogenin-recruitment-of-the-wave-regulatory-complex-to-ependymal-and-radial-progenitor-adherens-junctions-prevents-hydrocephalus
#14
Conor J O'Leary, Cathrin C Nourse, Natalie K Lee, Amanda White, Michael Langford, Kai Sempert, Stacey J Cole, Helen M Cooper
Denudation of the ependyma due to loss of cell adhesion mediated by cadherin-based adherens junctions is a common feature of perinatal hydrocephalus. Junctional stability depends on the interaction between cadherins and the actin cytoskeleton. However, the molecular mechanism responsible for recruiting the actin nucleation machinery to the ependymal junction is unknown. Here, we reveal that loss of the netrin/RGM receptor, Neogenin, leads to severe hydrocephalus. We show that Neogenin plays a critical role in actin nucleation in the ependyma by anchoring the WAVE regulatory complex (WRC) and Arp2/3 to the cadherin complex...
July 11, 2017: Cell Reports
https://www.readbyqxmd.com/read/28700924/mesoscopic-adaptive-resolution-scheme-toward-understanding-of-interactions-between-sickle-cell-fibers
#15
Lu Lu, He Li, Xin Bian, Xuejin Li, George Em Karniadakis
Understanding of intracellular polymerization of sickle hemoglobin (HbS) and subsequent interaction with the membrane of a red blood cell (RBC) is important to predict the altered morphologies and mechanical properties of sickle RBCs in sickle cell anemia. However, modeling the integrated processes of HbS nucleation, polymerization, HbS fiber interaction, and subsequent distortion of RBCs is challenging as they occur at multispatial scales, ranging from nanometers to micrometers. To make progress toward simulating the integrated processes, we propose a hybrid HbS fiber model, which couples fine-grained and coarse-grained HbS fiber models through a mesoscopic adaptive resolution scheme (MARS)...
July 11, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28699658/telomere-length-and-somatic-mutations-in-correlation-with-response-to-immunosuppressive-treatment-in-aplastic-anaemia
#16
Hee S Park, Si N Park, Kyongok Im, Sung-Min Kim, Jung-Ah Kim, Sang M Hwang, Dong S Lee
We investigated the frequencies of cytogenetic aberrations and somatic mutations of prognostic relevance in 393 patients with aplastic anaemia (AA). Clonality was determined by G-banding/fluorescence in situ hybridization (FISH) (n = 245), and targeted capture sequencing was performed for 88 haematopoiesis-related genes (n = 70). The telomere length (TL) of bone marrow nucleated cells was measured at the single cell level by FISH (n = 135). Eighteen (4·6%) patients showed disease progression, and monosomy 7 (50·0%) was the most predominant cytogenetic evolution at disease transformation...
July 12, 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28699006/adsorption-and-mineralization-of-ree-lanthanum-onto-bacterial-cell-surface
#17
Yangjian Cheng, Li Zhang, Xiaojing Bian, Hongyang Zuo, Hailiang Dong
A large number of rare earth element mining and application resulted in a series of problems of soil and water pollution. Environmental remediation of these REE-contaminated sites has become a top priority. This paper explores the use of Bacillus licheniformis to adsorb lanthanum and subsequent mineralization process in contaminated water. The maximum adsorption capacity of lanthanum on bacteria was 113.98 mg/g (dry weight) biomass. X-ray diffraction (XRD) and transmission electron microscopy (TEM) data indicated that adsorbed lanthanum on bacterial cell surface occurred in an amorphous form at the initial stage...
July 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28696052/dermoscopic-and-reflectance-confocal-microscopy-features-of-cutaneous-squamous-cell-carcinoma
#18
Marco Manfredini, Caterina Longo, Ferrari Barbara, Simonetta Piana, Elisa Benati, Alice Casari, Giovanni Pellacani, Elvira Moscarella
BACKGROUND: Squamous cell carcinoma (SCC) of the skin is a highly prevalent neoplasm. The management and the prognosis of this tumor is dependent on its invasiveness and its grade of differentiation. OBJECTIVES: To evaluate whether specific dermoscopic and reflectance confocal microscopy (RCM) criteria can predict the diagnosis of invasive SCC vs in situ SCC and poorly differentiated compared with well- and moderately differentiated SCC. METHODS: Dermoscopic and RCM images of SCCs were retrospectively evaluated for the presence of predefined criteria...
July 11, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28693471/spatial-pattern-analysis-of-nuclear-migration-in-remodelled-muscles-during-drosophila-metamorphosis
#19
Kuleesha, Lin Feng, Martin Wasser
BACKGROUND: Many human muscle wasting diseases are associated with abnormal nuclear localization. During metamorphosis in Drosophila melanogaster, multi-nucleated larval dorsal abdominal muscles either undergo cell death or are remodeled to temporary adult muscles. Muscle remodeling is associated with anti-polar nuclear migration and atrophy during early pupation followed by polar migration and muscle growth during late pupation. Muscle remodeling is a useful model to study genes involved in myonuclear migration...
July 10, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28693022/temsirolimus-sensitive-stimulation-of-platelet-activity-apoptosis-and-aggregation-by-collagen-related-peptide
#20
Hang Cao, Rosi Bissinger, Anja T Umbach, Meinrad Gawaz, Florian Lang
BACKGROUND/AIMS: The mammalian target of rapamycin (mTOR) inhibitor temsirolimus stimulates apoptosis of tumor cells and is thus therapeutically used for the treatment of diverse malignancies. On the other hand, temsirolimus has been shown to protect against apoptosis of hippocampal neurons. Similar to nucleated cells, blood platelets may enter suicidal death characterized by cell shrinkage and cell membrane scrambling. Platelet apoptosis is frequently preceded by Ca2+ entry, degranulation, integrin activation and stimulation of caspases...
July 11, 2017: Cellular Physiology and Biochemistry
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