Integrated microsystems for the in situ genetic detection of dengue virus in whole blood using direct sample preparation and isothermal amplification

The Analyst ◽  
2020 ◽  
Vol 145 (6) ◽  
pp. 2405-2411 ◽  
Author(s):  
Hyun Jin Yoo ◽  
Changyoon Baek ◽  
Min-Ho Lee ◽  
Junhong Min
Keyword(s):  
Sample Preparation ◽  
Dengue Virus ◽  
Whole Blood ◽  
Detection System ◽  
Isothermal Amplification ◽  
Integrated Microsystems ◽  
Genetic Detection ◽  
Direct Sample

An in situ detection system compatible with LAMP that can detect the dengue virus and discriminate between its serotypes in the whole blood.

In situ hemolysis in a three-dimensional paper-based device for quantification of intraerythrocytic analytes

2020 ◽  
Vol 12 (3) ◽  
pp. 281-287
Author(s):  
Keith R. Baillargeon ◽  
Jordan R. Bricknell ◽  
Charles R. Mace
Keyword(s):  
Sample Preparation ◽  
Chemical Treatment ◽  
Whole Blood ◽  
Three Dimensional

Quantitative in situ hemolysis is achieved for samples of whole blood using a chemical treatment without additional user-steps or sample preparation.

High performance Nanogold™-in situ hybridzation and its use in the detection of hybridized and PCR-amplified microscopical preparations

1996 ◽  
Vol 54 ◽  
pp. 896-897
Author(s):  
G. W. Hacker ◽  
I. Zehbe ◽  
J. Hainfeld ◽  
A.-H. Graf ◽  
C. Hauser-Kronberger ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Messenger Rna ◽  
High Performance ◽  
Detection System ◽  
Direct Methods ◽  
Genetic Alterations ◽  
Chain Reaction ◽  
Protein Encoding ◽  
Polymerase Chain

In situ hybridization (ISH) with biotin-labeled probes is increasingly used in histology, histopathology and molecular biology, to detect genetic nucleic acid sequences of interest, such as viruses, genetic alterations and peptide-/protein-encoding messenger RNA (mRNA). In situ polymerase chain reaction (PCR) (PCR in situ hybridization = PISH) and the new in situ self-sustained sequence replication-based amplification (3SR) method even allow the detection of single copies of DNA or RNA in cytological and histological material. However, there is a number of considerable problems with the in situ PCR methods available today: False positives due to mis-priming of DNA breakdown products contained in several types of cells causing non-specific incorporation of label in direct methods, and re-diffusion artefacts of amplicons into previously negative cells have been observed. To avoid these problems, super-sensitive ISH procedures can be used, and it is well known that the sensitivity and outcome of these methods partially depend on the detection system used.

To Eliminate Curtain Effect of FIB TEM Samples by a Combination of Sample Dicing and Backside Milling

2014 ◽  
Author(s):  
Jian-Shing Luo ◽  
Hsiu Ting Lee
Keyword(s):  
Sample Preparation ◽  
Focused Ion Beam ◽  
Preparation Method ◽  
Low Cost ◽  
Ion Beam ◽  
Sample Preparation Method ◽  
Site Specific ◽  
Dual Beam ◽  
Transmission Electron

Abstract Several methods are used to invert samples 180 deg in a dual beam focused ion beam (FIB) system for backside milling by a specific in-situ lift out system or stages. However, most of those methods occupied too much time on FIB systems or requires a specific in-situ lift out system. This paper provides a novel transmission electron microscopy (TEM) sample preparation method to eliminate the curtain effect completely by a combination of backside milling and sample dicing with low cost and less FIB time. The procedures of the TEM pre-thinned sample preparation method using a combination of sample dicing and backside milling are described step by step. From the analysis results, the method has applied successfully to eliminate the curtain effect of dual beam FIB TEM samples for both random and site specific addresses.

In-Situ Mechanical Sample Preparation of Selected Sites and Components on Large Modules and Boards

2016 ◽  
Author(s):  
Jim Colvin ◽  
Timothy Hazeldine ◽  
Heenal Patel
Keyword(s):  
Sample Preparation ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Tilt Table ◽  
Standard Requirement ◽  
Open Design ◽  
Bga Packages ◽  
Silicon Thickness ◽  
Board Level

Abstract The standard requirement for FA Engineers needing to remove components from a board, prior to decapsulation or sample preparation, is shown to be greatly reduced, by the methods discussed here. By using a mechanical selected area preparation system with an open-design it is possible to reach all required areas of a large printed circuit board (PCB) or module to prepare a single component ‘in situ’. This makes subsequent optical or electrical testing faster and often more convenient to accomplish. Electronic End-pointing and 3D curvature compensation methods can often be used in parallel with sample prep techniques to further improve the consistency and efficacy of the decapsulation and thinning uniformity and final remaining silicon thickness (RST). Board level prep eliminates the worry of rework removal of BGA packages and the subsequent risk of damage to the device. Since the entire board is mounted, the contamination is restricted to the die surface and can be kept from the underside ball connections unlike current liquid immersion methods of package thinning or delayering. Since the camera is in line with the abrasion interface, imaging is real time during the entire milling and thinning process. Recent advances in automated tilt-table design have meant that a specific component’s angular orientation can be optimized for sample preparation. Improved tilt table technology also allows for improved mounting capability for boards of many types and sizes. The paper describes methods for decapsulation, thinning and backside polishing of a part ‘in situ’ on the polishing machine and allows the system to operate as a probe station for monitoring electrical characteristics while thinning. Considerations for designing board-level workholders are described – for boards that that are populated with components on one or even both sides. Using the techniques described, the quality of sample preparation and control is on a par with the processing of single package-level devices.

A New Method of Wafer Level Plan View TEM Sample Preparation by DualBeam

2008 ◽  
Author(s):  
Hyoung H. Kang ◽  
Michael A. Gribelyuk ◽  
Oliver D. Patterson ◽  
Steven B. Herschbein ◽  
Corey Senowitz
Keyword(s):  
Sample Preparation ◽  
Ex Situ ◽  
Wafer Level ◽  
Cross Sectional ◽  
Plan View ◽  
Manufacturing Line ◽  
Transmission Electron ◽  
Thin Lamella ◽  
Preparation Techniques

Abstract Cross-sectional style transmission electron microscopy (TEM) sample preparation techniques by DualBeam (SEM/FIB) systems are widely used in both laboratory and manufacturing lines with either in-situ or ex-situ lift out methods. By contrast, however, the plan view TEM sample has only been prepared in the laboratory environment, and only after breaking the wafer. This paper introduces a novel methodology for in-line, plan view TEM sample preparation at the 300mm wafer level that does not require breaking the wafer. It also presents the benefit of the technique on electrically short defects. The methodology of thin lamella TEM sample preparation for plan view work in two different tool configurations is also presented. The detailed procedure of thin lamella sample preparation is also described. In-line, full wafer plan view (S)TEM provides a quick turn around solution for defect analysis in the manufacturing line.

Boreas: A Sample Preparation-Coupled Laser Spectrometer System for Simultaneous High-Precision In Situ Analysis of δ13C and δ2H from Ambient Air Methane

2021 ◽  
Author(s):  
Chris Rennick ◽  
Tim Arnold ◽  
Emmal Safi ◽  
Alice Drinkwater ◽  
Caroline Dylag ◽  
...  
Keyword(s):  
Sample Preparation ◽  
High Precision ◽  
Ambient Air ◽  
In Situ Analysis ◽  
Laser Spectrometer ◽  
Spectrometer System

Novel sliding hybrid microchip detection system for determination of whole blood phosphorus concentration

2021 ◽  
Vol 419 ◽  
pp. 129592
Author(s):  
Chin-Chung Tseng ◽  
Szu-Jui Chen ◽  
Song-Yu Lu ◽  
Chien-Hsuan Ko ◽  
Ju-Ming Wang ◽  
...  
Keyword(s):  
Whole Blood ◽  
Detection System ◽  
Phosphorus Concentration

An Integrated E-Tube Cap for Sample Preparation, Isothermal Amplification and Label-Free Electrochemical Detection of DNA

2021 ◽  
pp. 113306
Author(s):  
Zhiheng Xu ◽  
Kun Yin ◽  
Xiong Ding ◽  
Ziyue Li ◽  
Xuanhao Sun ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Electrochemical Detection ◽  
Isothermal Amplification ◽  
Label Free

scholarly journals Mammographic microcalcifications and risk of breast cancer

2021 ◽  
Author(s):  
Shadi Azam ◽  
Mikael Eriksson ◽  
Arvid Sjölander ◽  
Marike Gabrielson ◽  
Roxanna Hellgren ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Postmenopausal Women ◽  
Detection System ◽  
Premenopausal Women ◽  
Computer Aided Detection ◽  
Comprehensive Information ◽  
Estimated Risk ◽  
Logistic Regressions ◽  
Microcalcification Clusters

Abstract Background Mammographic microcalcifications are considered early signs of breast cancer (BC). We examined the association between microcalcification clusters and the risk of overall and subtype-specific BC. Furthermore, we studied how mammographic density (MD) influences the association between microcalcification clusters and BC risk. Methods We used a prospective cohort (n = 53,273) of Swedish women with comprehensive information on BC risk factors and mammograms. The total number of microcalcification clusters and MD were measured using a computer-aided detection system and the STRATUS method, respectively. Cox regressions and logistic regressions were used to analyse the data. Results Overall, 676 women were diagnosed with BC. Women with ≥3 microcalcification clusters had a hazard ratio [HR] of 2.17 (95% confidence interval [CI] = 1.57–3.01) compared to women with no clusters. The estimated risk was more pronounced in premenopausal women (HR = 2.93; 95% CI = 1.67–5.16). For postmenopausal women, microcalcification clusters and MD had a similar influence on BC risk. No interaction was observed between microcalcification clusters and MD. Microcalcification clusters were significantly associated with in situ breast cancer (odds ratio: 2.03; 95% CI = 1.13–3.63). Conclusions Microcalcification clusters are an independent risk factor for BC, with a higher estimated risk in premenopausal women. In postmenopausal women, microcalcification clusters have a similar association with BC as baseline MD.

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