Types of stress

Determine the coefficient of water permeability, waterproofing marks, chloride ion diffusion coefficients of some types of concrete commonly used in bridge construction subjected to pre-compressive and direct-compression loads. Develop a predictive model for life expectancy using reinforced concrete bridges taking into consideration the effect of the load according to the criteria of initial corrosion of reinforcement in concrete. Application of life expectancy for the structure of reinforced concrete bridges.

27p kequaidan7 01-09-2020 30 2   Download

Stress is the “wear and tear” our minds and bodies experience as we attempt to cope with our continually changing environment. Stress mainly occurs when the pressure is greater than the resource.

12p guineverehuynh 21-06-2020 19 4   Download

The problem of thermoelastic nanoscale beam based on a modified couple stress theory with diffusion subjected to ramp type heating is investigated. The Laplace transform technique and eigen value approach are applied to solve the equations which are written in the dimensionless form.

14p tohitohi 19-05-2020 17 2   Download

The article discusses the strength of concrete and other brittle materials in the case of nonuniform biaxial type of compression (σ1 > σ2 > 0) and triaxial compression of σ1 > σ2 = σ3 > 0  type (it was assumed that σ> 0 corresponds to compression). I

6p tohitohi 19-05-2020 17 0   Download

Head injuries are among the dangerous injuries which are common in all sport types. In the present study, the dynamic response of a punch to the head of a Wushu fighter was simulated by modeling the human head in ABAQUS software.

10p tohitohi 19-05-2020 14 0   Download

Generation of residual stress and structure deformation are the most important problems in the process of structure welding. Residual stresses inside and around the welded joints are harmful for integrity and proper functioning of the welded part.

8p tohitohi 19-05-2020 12 2   Download

Mode I and mode II stress intensity factors (SIFs) through the thickness of edge crack in semi circular bend (SCB) and center cracked circular disc (CCCD) specimens have been analyzed using three dimensional finite element analysis.

10p tohitohi 19-05-2020 12 0   Download

Oligomerization into multimeric complexes is a prerequisite for the chaperone function of almost all a-crystallin type heat shock proteins (a-Hsp), but the molecular details of complex assembly are poorly understood. The a-Hsp proteins from Bradyrhizobium japonicum are suitable bacterial models for structure-function studies of these ubiquitous stress proteins. They fall into two distinct classes, A and B, display chaperone activity in vitro and form oligomers of  24 subunits.

9p research12 01-06-2013 49 6   Download

Oviparously developing embryos of the brine shrimp, Artemia franciscana, synthesize abundant quantities of a small heat shock/a-crystallin protein, termed p26. Wild-type p26 functions as a molecular chaperone in vitro and is thought to help encysted Artemia embryos survive severe physiological stress encountered during diapause and anoxia. Full-length and truncated p26 cDNA derivatives were generated by PCR amplification of p26-3-6-3, then cloned in either pET21(+) or pRSETC and expressed in Escherichia coli BL21(DE3)....

10p research12 01-06-2013 56 5   Download

Double-stranded RNA-activated protein kinase (PKR), a serine/threonine kinase, is activated in virus-infected cells and acts as an antiviral machinery of type I interferons. PKR controls several stress response pathways induced by double-stranded RNA, tumor necrosis factor-aor lipo-polysaccharide, which result in the activation of stress-acti-vated protein kinase/c-Jun NH2 -terminal kinase and p38 of the mitogen-activated protein kinase family.

7p tumor12 22-04-2013 47 3   Download

Halobacterium salinarumdisplays four distinct kinetic forms of M-intermediate in its bacteriorhodopsin photocycle. In wild-type, there are mainly two species with time constants near 2 and 5 ms. Under various kinds of stress, two other species arise with time constants near 10 and 70 ms. We show that these four species are interconvertible. Increases in membrane hydrophobicity convert the slower to faster forms. Perturbations caused by Triton X-100 or mutations convert faster to slower forms.

7p tumor12 20-04-2013 26 4   Download

A number of drugs used in cancer chemotherapy induce oxidative stress by generation of oxygen free radicals (ROS) which might be an alternative mechanism for their cytotoxic effect via indu-cing apoptosis. In order to clarify the roles of antioxidants in chemotherapy, we investigated Quercetin (3,3’,4’,5,7-pentahyd-roxyflavone) and N-acetylcysteine (NAC) in different cell types treated with anticancer drugs. We studied cytotoxic activity of Topotecan alone and/or in combination with Quercetin in two human breast cancer cell lines, MCF-7 and MDA-MB-231. ...

7p inspiron33 26-03-2013 55 4   Download

DNA topoisomerase 6 (TOP6) belongs to a novel family of type II DNA topoisomerases present, other than in archaebacteria, only in plants. Here we report the isolation of full-length cDNAs encoding putative TOP6 sub-units A and B from rice (Oryza sativassp.indica), preserving all the struc-tural domains conserved among archaebacterial TOP6 homologs and eukaryotic meiotic recombination factor SPO11.

16p inspiron33 23-03-2013 41 4   Download

Hsp105aand Hsp105bare major heat shock proteins in mammalian cells that belong to a subgroup of the HSP70 family, HSP105⁄110. Previously, we have shown that Hsp105ahas opposite effects on stress-induced apop-tosis depending on the cell type. However, it is not fully understood how Hsp105 regulates stress-induced apoptosis.

13p galaxyss3 07-03-2013 42 3   Download

Oxidative stress, followed by the apoptotic death of pancreaticbcells, is considered to be one of causative agents in the evolution of the type 2 dia-betic state; therefore, the protection ofbcells can comprise an efficacious strategy for preventing type 2 diabetes. In the present study, RIN-m5F cells (i.e. the rat insulinoma bcell line) were stimulated with streptozotocin, resulting in a time- and concentration-dependent release of lactate dehydrogenase.

10p vinaphone15 28-02-2013 33 2   Download

Pancreaticb-cell dysfunction is a prerequisite for the development of type 2 diabetes. Alcoholism is a diabetes risk factor and ethanol increases oxida-tive stress in b-cells, whereas the mitochondrial chaperone prohibitin (PHB) has antioxidant effects in several cell types.

13p mobifone23 18-01-2013 37 4   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Analysis of tall fescue ESTs representing different abiotic stresses, tissue types and developmental stages

13p panasonic06 26-12-2011 50 3   Download

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Stress of different types increases the proinflammatory load in rheumatoid arthritis...

2p thulanh15 18-10-2011 45 2   Download