Abstract:
:Scanning electron microscope images of complete and damaged frustules of Nitzschia marina Grun. revealed an unusual chambered structure of the valve. This structure is not present in any existing nitzschioid genus and warrants an independent generic status for this taxon, which is therefore separated into Alveus gen. nov. Generic and emended specific definitions are provided and presented in the context of their relationship to other genera within the family Bacillariaceae. Deep relief of the inner surface of Alveus valves is similar to that of genera Fragilariopsis, Denticulopsis, Neodenticula, and Crucidenticula. It differs from all these diatoms in the alveolar striation. This heavily silicified diatom was found in samples from the US Joint Global Oceanographic Flux Studies cruise TT007 stations 2 and 4, (9 degrees and 5 degrees N respectively, 140 degrees W) in the equatorial Pacific. Presently, this uncommon species is restricted to warm waters. It is very common in the surface sediments of the equatorial Pacific and Indian Ocean and in the tropical and subtropical Atlantic. The sedimentary record of Alveus marinus goes back to the Middle Late Miocene (approximately 8 Ma years).
journal_name
Microsc Res Techjournal_title
Microscopy research and techniqueauthors
Kaczmarska I,Fryxell GAdoi
10.1002/(SICI)1097-0029(199601)33:1<2::AID-JEMT2>3subject
Has Abstractpub_date
1996-01-01 00:00:00pages
2-11issue
1eissn
1059-910Xissn
1097-0029pii
10.1002/(SICI)1097-0029(199601)33:1<2::AID-JEMT2>3journal_volume
33pub_type
杂志文章abstract::We present a new beam-shaping technique for two-color excitation fluorescence microscopy. We show that by simply inserting a properly designed shaded-ring filter in the illumination beam of smaller wavelength, it is possible to improve the effective optical sectioning capacity of such microscopes by 23%. Such an impro...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.20073
更新日期:2004-06-01 00:00:00
abstract::This study investigated the relationship between enteroendocrine and mucus-secreting cells distribution, the severity of colonic mucosal injury and intestinal motility in experimental colorectal carcinogenesis. Using a standardized murine model of colorectal carcinogenesis, eight-weeks-old female Wistar rats weighting...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.22534
更新日期:2016-01-01 00:00:00
abstract::A re-examination and modification of the very old oblique illumination technique has resulted in a method for contrast enhancement in microscopes, diffracted-light contrast (DLC), which provides high-contrast, high-resolution images of unstained biological material. The technique, which utilizes the diffracted light f...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/(SICI)1097-0029(19990815/01)46:4/5<334::AI
更新日期:1999-08-15 00:00:00
abstract::This work investigates recording bits on recordable and rewritable blu-ray discs using atomic force microscopy and conducting atomic force microscopy with high contrast, respectively. The geometric structure of the recording bits is clearly observed in images, which, when coupled with cross-section analysis, yields pr...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.20745
更新日期:2010-01-01 00:00:00
abstract::Directed growth cone movement is crucial for the correct wiring of the nervous system. This movement is governed by the concerted actions of cell surface receptors, signaling proteins, cytoskeleton-associated molecules, and molecular motors. In order to investigate the molecular basis of growth cone motility, we appli...
journal_title:Microscopy research and technique
pub_type: 杂志文章,评审
doi:10.1002/(SICI)1097-0029(20000115)48:2<97::AID-JEMT
更新日期:2000-01-15 00:00:00
abstract::Ribbon synapses differ from conventional chemical synapses in that they contain, within the cloud of synaptic vesicles (SV's), a specialized synaptic body, most often termed synaptic ribbon (SR). This body assumes various forms. Reconstructions reveal that what appear as rod- or ribbon-like profiles in sections are in...
journal_title:Microscopy research and technique
pub_type: 杂志文章,评审
doi:10.1002/(SICI)1097-0029(19961215)35:6<472::AID-JEM
更新日期:1996-12-15 00:00:00
abstract::This article presents an integrated approach for the authentication of five Russian icons through the study of their paint materials (elemental composition and stratigraphic mapping), state of conservation and artistic technique. The results of the applied analytical protocol, involving optical and scanning electron m...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.20727
更新日期:2009-10-01 00:00:00
abstract::Phytoliths are an important component for interpreting the ancient botanical record. However, phytoliths can be altered through heating, either as the result of such activities as firing ceramics, clay molds use for casting metal or in hearths. Phytoliths can also be altered through heating as the result of creating c...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.22004
更新日期:2012-07-01 00:00:00
abstract::Numerous studies using morphologic techniques have demonstrated the plasticity of pulmonary epithelial cells and the requirement for complex intercellular interactions for regeneration of normal epithelium following lung injury. Recent developments in the molecular characterization of genes expressed in the lung have ...
journal_title:Microscopy research and technique
pub_type: 杂志文章,评审
doi:10.1002/(SICI)1097-0029(19970901)38:5<473::AID-JEM
更新日期:1997-09-01 00:00:00
abstract::Worldwide, breast cancer (BrCa) is currently the leading cause of deaths associated to malignant lesions in adult women. Given that some studies have mentioned that peritumoral adipocytes may contribute to breast carcinogenesis, present work sought to quantitative evaluate the morphometry of these cells in a group of ...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.22972
更新日期:2018-02-01 00:00:00
abstract::We summarize the molecular phenotype, diagnostic criteria, and the newest advances related to seeking the pathogenic mechanism(s) of sporadic inclusion-body myositis (s-IBM), a muscle disease usually of persons over age 50. On the basis of our research, several processes seem to be important in relation to the still-s...
journal_title:Microscopy research and technique
pub_type: 杂志文章,评审
doi:10.1002/jemt.20186
更新日期:2005-07-01 00:00:00
abstract::Oxygen-annealed surfaces of sapphire with low Miller indices ((0001), [1010], [1120], [1011]) have been studied in both transmission electron microscopy (TEM) and reflection electron microscopy (REM) configurations. The significance of REM diffraction conditions for the determination of the nature of the step heights ...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.1070210103
更新日期:1992-03-01 00:00:00
abstract::The family Scrophulariaceae consists of taxonomically complex genera and species. The delimitation of the taxa within this family is always challenging. In this paper, we studied leaf epidermis anatomical characteristics and its taxonomic significance of four species belonging to four genera of the family Scrophularia...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.23608
更新日期:2020-09-29 00:00:00
abstract::The present paper covers the results of different transmission electron microscopy studies on silver halide microcrystals. Pure AgBr as well as core-shell AgBr-AgBrI crystals are investigated. In the former parallel and non-parallel twinning modes yielding tabular and needle- or tetrahedral-shaped microcrystals, respe...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/(SICI)1097-0029(19980715)42:2<85::AID-JEMT
更新日期:1998-07-15 00:00:00
abstract::Human monocytic leukemia U937 cells readily undergo apoptosis when exposed to various stimuli, including inhibition of protein synthesis, oxidative stress, antitumoral agents, etc. The sequential, step-by-step morphological changes in U937 cells that occur during the apoptotic program are largely determined by the act...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.20058
更新日期:2004-05-01 00:00:00
abstract::MIS, as a differentiate and antiproliferative agent, is precisely regulated, for example, at the transcriptional level by such transacting factors as SRY, and posttranslationally by testosterone. Processing of MIS most likely requires an as yet unknown in vivo protease which probably serves to control cleavage of MIS ...
journal_title:Microscopy research and technique
pub_type: 杂志文章,评审
doi:10.1002/jemt.1070250205
更新日期:1993-06-01 00:00:00
abstract::This study was carried out to identify 20 high valued medicinal plants of District Lahore, Punjab, Pakistan with the help of the palynological studies. The distinguishing characteristics for selected species were found by systematized methods using light microscopy and Scanning Electron Microscopy. In this study, impo...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.23096
更新日期:2018-12-01 00:00:00
abstract::In this article, the Ni-Cu nanoparticles (NPs) in the amorphous carbon hydrogenated thin films with different copper percentage by co-deposition of RF-plasma enhanced chemical vapor deposition were prepared using acetylene gas and Ni and Cu targets. The films deposited with 5% Cu have minimum value of the average diam...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.23679
更新日期:2020-12-22 00:00:00
abstract::The thin layer of liquid that lines the conducting airway epithelium, the airway surface liquid (ASL), is important for mucociliary clearance. Altered ionic composition and/ or volume of the ASL play a major role in the pathology of airway diseases such as cystic fibrosis. Since the ASL is a thin layer, it has been di...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.20217
更新日期:2005-09-01 00:00:00
abstract::In this paper we present the state of knowledge on cell-cell interactions in the testis of two groups of anamniote vertebrates--teleosts and elasmobranchs--which include most fish. In these fish, the structural organization of the testis differs fundamentally from that which characterizes amniotes in which the germina...
journal_title:Microscopy research and technique
pub_type: 杂志文章,评审
doi:10.1002/jemt.1070320606
更新日期:1995-12-15 00:00:00
abstract::The study focused on the description of pig gallbladder angioarchitecture, with particular emphasis on the specifics of the course of blood vessels in individual layers of the gallbladder wall. Furthermore, the vascular systems of the pig gallbladder were analyzed in terms of the adaptation of this organ to changes in...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.22388
更新日期:2014-09-01 00:00:00
abstract::The subcellular behavior of aluminum and indium, used in medical and industrial fields, was studied in the gastric mucosa and the liver after their intragastric administration to rats, using, two of the most sensitive methods of observation and microanalysis, the transmission electron microscopy, and the secondary ion...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.21041
更新日期:2012-02-01 00:00:00
abstract::Golgi impregnations reveal a variety of dendritic morphologies amongst Kenyon cells in the mushroom bodies of Drosophila melanogaster. Different morphological types of Kenyon cells contribute axon-like processes to five divisions of the medial and vertical lobes. Four of these divisions have characteristic affinities ...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.10368
更新日期:2003-10-01 00:00:00
abstract::Atomic force microscope (AFM) has been widely used in the biological field owing to its high sensitivity (subnanonewton), high spatial resolution (nanometer), and adaptability to physiological environments. Nowadays, force volume (FV) and peakforce quantitative nanomechanical (QNM) are two distinct modes of AFM used i...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.23351
更新日期:2019-11-01 00:00:00
abstract::Atomic force microscopy has been used to study self-assembled structures of two alpha-hemolysin mutants. For a mutant (alphaHL-H5) that was locked into the prepore state on fluid phase egg-PC membranes, we visualized, for the first time, heptameric prepores and showed that the 7-fold axis in the prepore lies perpendic...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/(SICI)1097-0029(19990301)44:5<353::AID-JEM
更新日期:1999-03-01 00:00:00
abstract::The molecular basis of hearing is less well understood than many other senses. However, recent studies in Drosophila have provided some important steps towards a molecular understanding of hearing. In this report, we summarize these findings and their implications on the relationship between hearing and touch. In Dros...
journal_title:Microscopy research and technique
pub_type: 杂志文章,评审
doi:10.1002/jemt.20053
更新日期:2004-04-15 00:00:00
abstract::Widespread implementation of prostate cancer screening has affected several epidemiologic features of the disease including incidence, tumor and patient characteristics, patterns of care and outcomes. Some of these changes have been interpreted as evidence of the success of PSA testing as a cancer control strategy. Da...
journal_title:Microscopy research and technique
pub_type: 杂志文章,评审
doi:10.1002/1097-0029(20001201)51:5<415::AID-JEMT2>3.0
更新日期:2000-12-01 00:00:00
abstract::The region-specific angioarchitecture of the bovine pododerma was examined using systematic scanning electron microscopy of micro-corrosion casts of juvenile and adult bovine claws. Particular emphasis was laid on the demonstration of specialised vascular structures such as arteriovenous anastomoses. Comparing the res...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.1150
更新日期:2001-09-15 00:00:00
abstract::Basement membranes (BMs) were first described in the mid-19th century, but they were not isolated and prepared for compositional studies until nearly 100 years later. Early methods of isolation were carried out on renal glomeruli, which were first sub-fractionated from kidney tissues by sieving. BMs were then isolated...
journal_title:Microscopy research and technique
pub_type: 杂志文章,评审
doi:10.1002/jemt.1070280302
更新日期:1994-06-15 00:00:00
abstract::The possibility that tannic acid and other classical mordants can be used in the electron microscopical section staining technique has been tested. A mordant can be defined as a chemical that combines with both a certain specific tissue component and the staining substance and thereby permits a staining reaction that ...
journal_title:Microscopy research and technique
pub_type: 杂志文章
doi:10.1002/jemt.1070210110
更新日期:1992-03-01 00:00:00