As we sit at the microscope with users, waiting for data to collect, we frequently find
ourselves answering the same questions, time after time. The users need to know what
their data tells them about the sample, how it should be interpreted or processed, or a
myriad of other details about the experiment. At other times, we find ourselves
explaining why a particular experiment cannot be performed, or, at least, why it is more
complex than appears at first glance. Sometimes students need help describing these
issues to their advisors.
Transmission electron microscopy (TEM) is a technique where the electron-beam is
transmitted through an ultra-thin specimen, interacting with specimen as it passes
through it. An image is formed from the interaction of the electrons transmitted
through the specimen, which is then magnified and focused onto an imaging device,
such as a fluorescent screen, a photographic film, or a charge-coupled device (CCD)
sensor. This technique is capable of imaging at significantly high resolution than the
light microscopes, owing to the small de-Broglie wavelength of electrons....
Today, an individual would be hard-pressed to find any science field that does not employ methods and instruments based on the use of fine focused electron and ion beams. Well instrumented and supplemented with advanced methods and techniques, SEMs provide possibilities not only of surface imaging but quantitative measurement of object topologies, local electrophysical characteristics of semiconductor structures and performing elemental analysis.
Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Transmission electron microscopic observations of nanobubbles and their capture of impurities in wastewater
In 1999, LBNL asked the area’s cellular carriers to propose a solution to the problem. Cingular Wireless
(previously Cellular One and AT&T Wireless) proposed installing an InterReach in-building wireless
system. After the IT staff determined that the in-building system wouldn’t interfere with sensitive
scientific instruments such as electron microscopes, Cingular got the go-ahead to install it.
Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học 'Respiratory Research cung cấp cho các bạn kiến thức về ngành y đề tài: " Alterations of alveolar type II cells and intraalveolar surfactant after bronchoalveolar lavage and perfluorocarbon ventilation. An electron microscopical and stereological study in the rat lung...
(BQ) Part 1 book "Histology at a glance" presents the following contents: Preparation of tissues for histology, sectioning and appearance of sections in the light microscope, light and electron microscopes, the cell and its components, cell division, cardiac and smooth muscle,...
Microscopes have always been one of the essential instruments for research
in the biomedical field. Radiation-based microscopes (such as the light microscope
and the electron microscope) have become trustworthy companions in
the laboratory and have contributed greatly to our scientific knowledge. However,
although digital techniques in recent years have still enhanced their performance,
the limits of their inherent capabilities have been progressively
Kính hiển vi điện tử
quét (Scanning Electron
Là một loại kính hiển vi
điện tử có thể tạo ra ảnh với
độ phân giải cao của bề mặt
mẫu vật bằng cách sử dụng
một chùm điện tử hẹp quét
trên bề mặt mẫu.
Kính hiển vi điện tử quét (tiếng Anh: Scanning Electron Microscope, thường viết tắt là
SEM), là một loại kính hiển vi điện tử có thể tạo ra ảnh với độ phân giải cao của bề mặt
mẫu vật bằng cách sử dụng một chum điện tử (chùm các electron) hẹp quét trên bề mặt mẫu.
Việc tạo ảnh của mẫu vật được thực hiện thông qua việc ghi nhận và phân tích các bức xạ
phát ra từ tương tác của chùm điện tử với bề mặt mẫu vật.Năm 1948, C. W.
Various mesoscopic systems have their own unique characteristics, some of
which are of importance due to bridging function over classical and quantum
mechanics. It is quite natural that human beings living in macroscopic world
could hardly grasp the phenomena occurring in the microscopic world in an
intuitive manner. This situation offers a vital sense in the "observation" problem
necessarily accompanied with the classical means. The fundamental core of the
argument between Einstein-Podolsky-Rosen and Bohr starting in 1935 actually
lies in this point.
Until very recently most people associated nanotechnology with science fictionbased
accounts that tended to focus on fantastical devices and applications.
With recent developments in nanoscience (for example greater control over
atomic structure due in part to the atomic force microscope), nanotechnology
has entered the commercial realm, and has simultaneously begun the journey
of finding its space within the social imaginary. This book represents a leg of
In 1959, Richard P. Feynman, Professor of Physics at the California Institute of
Technology and Nobel Laureate, delivered an address at the American Physical
Society, which is given the credit for inspiring the field of nanotechnology. Published
in Engineering and Science, Feynman’s address entitled “Plenty of Room at the
Bottom” described a new field of science dealing with “the problem of manipulating
and controlling things on a small scale.
This paper will show the results of the first experiments to get nano-clay clay composite materials based on modified polystyrene resin by melt - mix method. The intercalated nanocomposite structures are characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques. Polystyrene nano-composites with 2% nanoclay by weight exhibit an increases about 10% in impact resistance and they also lower the water absortion (nearly 60% compared with polystyrene resin) without any significant loss of tensile strength, flexural strength and flexural modulus.
The traditional classification of acute leukemia used criteria proposed by the French–
American–British Cooperative Group (FAB) , using the 30% bone marrow blast cell cutoff
(Bennett et al, 1985). This classification system originally distinguished different leukemia
types by morphologic features and cytochemical studies, particularly myeloperoxidase (or
Sudan black B) and non-specific esterase staining. It was revised to include leukemia types
that could only be accurately identified with the addition of immunophenotyping or
electron microscopic studies (Bennett et al., 1991)....