A SEM Study of Unexplored Wax Microtubes Produced by Caterpillar Living on Common Banana Leaves
Publication date: Available online 29 July 2019Source: MicronAuthor(s): Salprima Yudha S., Aswin Falahudin, Deni Agus Triawan, Morina AdfaAbstractThe primary concern of this research is to perform a microscopic analysis of the natural wax covering banana skipper caterpillar. The scanning electron microscopic (SEM) analysis shows that the wax exhibits an unprecedented microtubular form, consisting of carbon and oxygen as main elements as revealed by energy dispersive X-ray (EDX) analysis. The Fourier Transform Infra-Red (FTIR) spectroscopic analysis, which reveals the presence of peaks at 2914, 2890, 1469, and 722 cm −â...
Source: Micron - July 30, 2019 Category: Biology Source Type: research
Preface – Electron microscopy of beam-sensitive materials
Publication date: October 2019Source: Micron, Volume 125Author(s): Thomas Slater (Source: Micron)
Source: Micron - July 30, 2019 Category: Biology Source Type: research
Towards more reliable AFM force-curve evaluation: a method for spring constant selection, adaptive lever sensitivity calibration and fitting boundary identification
Publication date: Available online 26 July 2019Source: MicronAuthor(s): Judit Kámán, Róbert Huszánk, Attila BonyárAbstractThis work discusses key issues regarding the atomic force microscopy (AFM) force-curve evaluation practice, which can affect the determined Young’s modulus of the investigated sample. These issues are 1) the proper calibration of lever sensitivity and the effect of its variation between the measurements; 2) the selection of proper cantilever spring constant for the investigated sample; and 3) the selection of the fitting boundaries for the contact mechanics model-based force-curve evaluation. A m...
Source: Micron - July 27, 2019 Category: Biology Source Type: research
Editorial Board
Publication date: September 2019Source: Micron, Volume 124Author(s): (Source: Micron)
Source: Micron - July 27, 2019 Category: Biology Source Type: research
Comparative sperm morphology of Proceratophrys and Odontophrynus (Anura, Odontophrynidae)
Publication date: Available online 25 July 2019Source: MicronAuthor(s): Julio Sérgio Santos, William Pinheiro da Costa, Karin Regina Seger, Shirlei Maria Recco-PimentelAbstractThe ultrastructure of the spermatozoa of seven species of Proceratophrys and one of Odontophrynus was analyzed in the present study. The sperm of Odontophrynus juquinha is similar to that of Odontophrynus cultripes, described previously, and to those of Proceratophrys branti, Proceratophrys bigibbosa, Proceratophrys affinis concavitympanum, Proceratophrys huntingtoni, Proceratophrys conformis moratoi, P. moratoi, and Proceratophrys palustris, in rel...
Source: Micron - July 26, 2019 Category: Biology Source Type: research
Mapping the strain distribution within embedded nanoparticles via geometrical phase analysis
Publication date: Available online 23 July 2019Source: MicronAuthor(s): Yan Wang, Wei ZhangAbstractStrain variation within a nanoparticle plays a crucial role in tuning its properties. Geometrical phase analysis (GPA) is typically a powerful tool to investigate the strain in high-resolution transmission electron microscopy (HRTEM) images. It is known that the traditional GPA method measuring the displacement of lattice fringes directly in an HRTEM image is inapplicable to strain measurements on nanoparticles embedded in a matrix, where lattice fringes of nanoparticles are invisible, instead Moiré fringes are present. Furt...
Source: Micron - July 24, 2019 Category: Biology Source Type: research
Effect of density and Z-contrast on the visibility of noble gas precipitates and voids with insights from Monte-Carlo simulations
Publication date: Available online 11 July 2019Source: MicronAuthor(s): Anamul H. Mir, Jonathan. A. Hinks, Stephen. E. DonnellyAbstractIn this work, a detailed analysis of He, Ne, Ar, Kr and Xe precipitates in a complex borosilicate glass using transmission electron microscopy (TEM) with in-situ ion implantation is presented. With in-situ monitoring, the real-time dynamics of precipitate and void evolution under ion implantation was followed. Using appropriate equations of state and, Monte-Carlo simulations to supplement the TEM images, we then discuss in detail the possibility and ways of differentiating the precipitates ...
Source: Micron - July 12, 2019 Category: Biology Source Type: research
Heat transfer in the Tank-Inflorescence of Nidularium innocentii (Bromeliaceae): Experimental and Finite Element Analysis based on X-ray microtomography
This study investigates the role of water in the flowers and inflorescences of Nidularium innocentii, and describes water as a protection mechanism. Individuals were divided into groups with and without water provision in inflorescences. Both groups were maintained with water in soil and leaves under the same environmental conditions. During anthesis, individuals were collected, and inflorescences were measured. Another specimen was prepared and scanned using X-ray microtomography (µCT), generating a high-resolution 3D model that was converted into a discretized geometry. Heat transfer finite element analysis (FEA) of the...
Source: Micron - July 12, 2019 Category: Biology Source Type: research
Coherent strain of Guinier–Preston II zone in an Al–Zn–Mg–Cu alloy
Publication date: Available online 2 July 2019Source: MicronAuthor(s): Xiaohu Hou, Jijun Li, Fei Liu, Liangming Yan, Pucun BaiAbstractThe Guinier-Preston (GP) II zone in an Al–Zn–Mg–Cu alloy was investigated by using a high-resolution electron microscopy (HREM). We used Geometric Phase Analysis (GPA) technique to measure the experimental HREM image and the simulated HREM image to obtain the strain distribution maps. The results show converging strain fields in the GP II zone, and the maximum compressive strain can reach ―7.2% and ―6.7%, respectively. The distribution of the experimental strain field was in consis...
Source: Micron - July 3, 2019 Category: Biology Source Type: research
Effect of extract from ginseng rust rot on the inhibition of human hepatocellular carcinoma cells in vitro
In this study, the HCC cells were treated with different parts of mountain cultivated ginseng rust rot and compared with human normal liver cells. The morphology, survival rate and β-actin expression of the cells were changed by introducing the ginseng epidermis during the incubation process. Notably, the results reveal that the ginseng epidermis can induce apoptosis by altering the morphologies of cells, indicating the practical implication for the HCC treatment and drug development. (Source: Micron)
Source: Micron - July 3, 2019 Category: Biology Source Type: research
Microscopic imaging quality improvement through L0 gradient constraint model based on multi-fields of view analysis
Publication date: Available online 29 June 2019Source: MicronAuthor(s): Jufeng Zhao, Chao Wu, Weiping Hua, Guangmang Cui, Keqi Zhang, Yu Zhang, Yue ZangAbstractThe degradation of optical microscopic imaging is space-variant, and how to fast restore optical degraded image remains a special problem. Based on point spread function (PSF) estimation under each field of view (FOV), a L0 gradient-constrained image restoration method is proposed to solve optical degradation in microscopic imaging. Firstly, the whole scene is segmented into several different regions according to different FOV. The PSFs for each region are estimated...
Source: Micron - June 30, 2019 Category: Biology Source Type: research
Improved Vinegar & Wellington Calibration for Estimation of Fluid Saturation and Porosity from CT Images for a Core Flooding Test under Geologic Carbon Storage Conditions
Publication date: Available online 29 June 2019Source: MicronAuthor(s): Xiuxiu Miao, Yan Wang, Liwei Zhang, Ning Wei, Xiaochun LiAbstractX-ray computed tomography (CT) of fluid flow in formation rocks is an important characterization technique in geologic carbon sequestration research to provide insight into the migration and capillary trapping of CO2 under reservoir conditions. An improved calibration method adapted from traditional Vinegar & Wellington calibration is proposed to map the 3D pore and fluid distributions from the CT images of CO2/brine displacement flooding. Similar to Vinegar & Wellington calibration, the ...
Source: Micron - June 30, 2019 Category: Biology Source Type: research
Nitrogen deprivation elicits dimorphism, capsule biosynthesis and autophagy in Papiliotrema laurentii strain RY1
Publication date: Available online 26 June 2019Source: MicronAuthor(s): Soumyadev Sarkar, Avishek Mukherjee, Subhadeep Das, Bidisha Ghosh, Shouvik Chaudhuri, Debanjana Bhattacharya, Arpita Sarbajna, Ratan GachhuiAbstractStress response due to the lack of essential nutrient(s) for an organism has been a focal point of several scientific investigations. The present study investigates the cellular adaptations behind the ability of Papiliotrema laurentii strain RY1 to perpetuate without added nitrogen and propagate robustly in growth- limiting amount of nitrogen. We executed phenotypic (using scanning electron microscopy, diff...
Source: Micron - June 27, 2019 Category: Biology Source Type: research
Guy Cox, Fundamentals of Fluorescence Imaging, 2019, Jenny Stanford Publishing; Singapore.
Publication date: September 2019Source: Micron, Volume 124Author(s): Marc A.M.J. van Zandvoort (Source: Micron)
Source: Micron - June 27, 2019 Category: Biology Source Type: research
Identification of collagen fibrils in cross sections of bone by electron energy loss spectroscopy (EELS)
Publication date: Available online 20 June 2019Source: MicronAuthor(s): Bryan E.J. Lee, Lucy Luo, Kathryn Grandfield, Carmen M. Andrei, Henry P. SchwarczAbstractTransmission electron microscopic (TEM) images of ion-milled bovid cortical bone cut approximately normal to the axes of fibrils show that mineral occurs in the form of plates surrounding and laying between circular or elliptical features about 50 nm in diameter. The classification of these features as either pores or collagen fibrils is highly debated. Electron energy loss spectroscopy (EELS) mapping of these features in ion milled sections shows that they are l...
Source: Micron - June 20, 2019 Category: Biology Source Type: research
