Archive for the ‘researches 4’ Category
Friday, May 16th, 2008
In 1957, Charles Hard Townes and Arthur Leonard Schawlow, then at Bell Labs, began a serious study of the infrared laser. As ideas were developed, infrared frequencies were abandoned with focus on visible light instead. The concept was originally known as an "optical maser". Bell Labs filed a patent application ...
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Sunday, March 16th, 2008
[Effects of sample size on the observed number of allele of 9 STR loci with various genetic data.]
In the genetic study, the samples can greatly influence the analysis and interpretation of the genetic data obtained. Here we examined the effects of sample size on the observed number of allele ...
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Sunday, March 16th, 2008
[Association study between PPARGC1A Thr394Thr/ Gly482Ser polymorphisms and type 2 diabetes.]
To investigate the association between single nucleotide polymorphisms (SNPs) rs2970847(Thr394Thr) and rs8192678(Gly482Ser) of peroxisome proliferators activated receptor gamma coactivator-1(PPARGC1A)gene and type 2 diabetes in Chinese Han population in Hubei. The Thr394Thr and Gly482Ser polymorphisms of ...
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Sunday, March 16th, 2008
[NF1 mutation analysis in a Chinese family with neuro- fibromatosis type.]
A Chinese family affected with autosomal dominant disorderneurofibromatosis typewas identified in this study. Linkage analysis was performed, and DNA sequencing for whole coding region of NF1 was carried out to identify the disease-causing mutation. The ...
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Sunday, March 16th, 2008
[Microarray-based methods to identify DNA methylation in cancer.]
DNA methylation is an epigenetic modification associated with gene transcription regulation, X-chromosome inactivation, regulation of development and cell differentiation. Aberrant DNA methylation has been linked to cancer. The advent of microarray technology has provided new opportunities for high-throughput ...
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Sunday, March 16th, 2008
[Research progress on diacylgycerol acyltransferase 2 (DGAT2) gene.]
Diacylgycerol acyltransferase2 (DGAT2) is an important enzyme in many organisms. DGAT2 catalyzes the final step of triacylglycerol (TAG) biosynthesis by converting diacylgycerol (DAG) and fatty acyl-coenzyme A (CoA) into TAG. This enzyme is encoded by both DGAT2 and ...
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Sunday, March 16th, 2008
[Use of Apc(Min/+) mouse model in the studies of intestinal tumors.]
More than thirty kinds of mutant or knockout mice bearing intestinal neoplasm have been reported up to the present. Apc(Min/+) mouse holding multiple intestinal neoplasia, provides an appropriate model to evaluate human familial adenomatous polyposis. ...
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Sunday, March 16th, 2008
[Activation tagging and its application in plant functional genomics research.]
It is a practical strategy to screen for mutants in the research of plant functional genomics. Comparing with classical T-DNA knock-out mutagenesis technology by the loss-of-function mutation, the activation T-DNA tagging technique based on the gain-of-function ...
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Sunday, March 16th, 2008
[Progress in the study of genetic diversity of Mongolian horse.]
Mongolian horse is a kind of important breed resource of local horses in our country. It has a lot of advantages such as powerful endurance, rough feeding resistance, and strong disease resistance. These advantages have become ...
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Sunday, March 16th, 2008
[Association between mitochondrial DNA mutations and cancer in human.]
Mitochondria are essential organelles that generate cellular energy in cells. Mutations of mitochondrial DNA (mtDNA) have been identified in various types of cancer, suggesting a complex relationship between mtDNA and cancer. This review focuses on the possible ...
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Sunday, March 16th, 2008
[Yuet wai kan.]
Guo XQ.
Department of Biochemistry, Bethune Military Medical College, Shijiazhuang 050081, China.
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Sunday, March 16th, 2008
[Strategies for cloning of novel genes based on EST.]
Expressed sequence tags (EST) are short, randomly selected single-pass nucleotide sequence reads derived from cDNA libraries and represent a small part of a gene. Along with the development of bioinformatics and genetic localization, EST has already become ...
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Sunday, March 16th, 2008
Review. From empirical patterns to theory: a formal metabolic theory of life.
The diversity of life on Earth raises the question of whether it is possible to have a single theoretical description of the quantitative aspects of the organization of metabolism for all organisms. However, similarities ...
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Sunday, March 16th, 2008
Short messages.
This paper has three purposes. The first one is to explain to a general audience what is involved in retrieving a web page or performing some other complex network transaction, and what can make it slow, and why the problem of slowness is likely ...
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Sunday, March 16th, 2008
Review. A review of the diversity and evolution of photonic structures in butterflies, incorporating the work of John Huxley (The Natural History Museum, London from 1961 to 1990).
The photonic structures of butterfly wings are among the most anatomically diverse of all those in nature, giving ...
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Sunday, March 16th, 2008
Robust bi-level optimization models in transportation science.
Mathematical programmes with equilibrium constraints (MPECs) constitute important modelling tools for network flow problems, as they place \'what-if\' analyses in a proper mathematical framework. We consider a class of stochastic MPEC traffic models that explicitly incorporate possible uncertainties in ...
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Sunday, March 16th, 2008
Pushing versus pulling: division of labour between tarsal attachment pads in cockroaches.
Adhesive organs on the legs of arthropods and vertebrates are strongly direction dependent, making contact only when pulled towards the body but detaching when pushed away from it. Here we show that the two ...
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Sunday, March 16th, 2008
Function of bright coloration in the wasp spider Argiope bruennichi (Araneae: Araneidae).
There are two major competing explanations for the counter-intuitive presence of bright coloration in certain orb-web spiders. Bright coloration could lure insect prey to the web vicinity, increasing the spider\'s foraging success. Alternatively, the ...
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Sunday, March 16th, 2008
Comparing the strength of behavioural plasticity and consistency across situations: animal personalities in the hermit crab Pagurus bernhardus.
Many phenotypic traits show plasticity but behaviour is often considered the \'most plastic\' aspect of phenotype as it is likely to show the quickest response to temporal changes ...
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Sunday, March 16th, 2008
Strategic adjustment of begging effort by banded mongoose pups.
Variation in the intensity of conspicuous displays raises three basic questions: (i) the relationship between internal state and display intensity, (ii) the relationship between display intensity and receiver response, and (iii) the effect of variation in receiver ...
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Sunday, March 16th, 2008
Automatic identification of bird targets with radar via patterns produced by wing flapping.
Bird identification with radar is important for bird migration research, environmental impact assessments (e.g. wind farms), aircraft security and radar meteorology. In a study on bird migration, radar signals from birds, insects and ...
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Sunday, March 16th, 2008
Informational conflicts created by the waggle dance.
The honeybee (Apis mellifera) waggle dance is one of the most intriguing animal communication signals. A dancing bee communicates the location of a profitable food source and its odour. Followers may often experience situations in which dancers indicate an ...
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Sunday, March 16th, 2008
Modelling heterogeneity and the impact of chemotherapy and vaccination against human hookworm.
There is a growing emphasis on the development of vaccines against helminths (worms), and mathematical models provide a useful tool to assess the impact of new vaccines under a range of scenarios. The present ...
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Sunday, March 16th, 2008
Local song elements indicate local genotypes and predict physiological condition in song sparrows Melospiza melodia.
Geographical variation in birdsong is taxonomically widespread and behaviourally salient, with females often preferring local over non-local song. However, the benefits associated with this preference remain poorly understood. One potential explanation ...
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Sunday, March 16th, 2008
Influence of epidermal hydration on the friction of human skin against textiles.
Friction and shear forces, as well as moisture between the human skin and textiles are critical factors in the formation of skin injuries such as blisters, abrasions and decubitus. This study investigated how epidermal ...
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