scholarly journals A PERFORATED MOBILE BREAKWATER FOR FIXED AND FLOATING APPLICATION

1966 ◽  
Vol 1 (10) ◽  
pp. 63 ◽  
Author(s):  
Wilbur Marks
Keyword(s):  
Potential Role ◽  
Front Wall ◽  
Test Results ◽  
Practical Application ◽  
Back Wall ◽  
Mooring Lines ◽  
Application Model ◽  
Perforated Breakwater ◽  
Future Work

A mobile breakwater concept based upon a perforated front wall and solid back wall is presented. The principles of energy dissipation by the system is discussed as well as the potential role of such a device within the framework of practical application. Model test results, comparing the perforated breakwater's response to waves with that of a caisson-type breakwater, are discussed. It is shown that the perforated breakwater experiences less force on the structure when it is fixed to the bottom and less force on the mooring lines when afloat than the caisson-type. However, the perforated breakwater is not more effective in reducing waves, for the conditions tested. Visual observations show that scouring is prevalent when the caisson-type is fixed to the bottom; there is no evidence of scouring with the perforated breakwater. Recommendations are made for future work.

scholarly journals Natural variation in teosinte at the domestication locus teosinte branched1 (tb1)

2014 ◽  
Author(s):  
Laura Vann ◽  
Thomas Kono ◽  
Tanja Pyha ̈j ̈arvi ◽  
Matthew B Hufford ◽  
Jeffrey Ross-Ibarra
Keyword(s):  
Population Genetic ◽  
Potential Role ◽  
Strong Association ◽  
Pcr Assay ◽  
Phenotypic Data ◽  
Maize Population ◽  
Teosinte Branched1 ◽  
Genetic Signatures ◽  
Future Work

Premise of the study: The teosinte branched1 (tb1) gene is a major QTL controlling branching differences between maize and its wild progenitor, teosinte. The insertion of a transposable element (Hopscotch) upstream of tb1 is known to enhance the gene's expression, causing reduced tillering in maize. Observations of the maize tb1 allele in teosinte and estimates of an insertion age of the Hopscotch that predates domestication led us to investigate its prevalence and potential role in teosinte. Methods: Prevalence of the Hopscotch element was assessed across an Americas-wide sample of 837 maize and teosinte individuals using a codominant PCR assay. Population genetic summaries were calculated for a subset of individuals from four teosinte populations in central Mexico. Phenotypic data were also collected using seed from a single teosinte population where Hopscotch was found segregating at high frequency. Key results: Genotyping results indicate the Hopscotch element is found in a number of teosinte populations and linkage disequilibrium near tb1 does not support recent introgression from maize. Population genetic signatures are consistent with selection on this locus revealing a potential ecological role for Hopscotch in teosinte, but a greenhouse experiment does not detect a strong association between tb1 and tillering in teosinte. Conclusions: Our findings suggest the role of Hopscotch differs between maize and teosinte. Future work should assess tb1 expression levels in teosinte with and without the Hopscotch and more comprehensively phenotype teosinte to assess the ecological significance of the Hopscotch insertion and, more broadly, the tb1 locus in teosinte.

scholarly journals Serum-to-urine renalase ratio and its differences between healthy adults and chronic kidney disease patients

2019 ◽  
Author(s):  
Natalia Maria Serwin ◽  
Magda Wiśniewska ◽  
Elżbieta Cecerska-Heryć ◽  
Krzysztof Safranow ◽  
Edyta Skwirczyńska ◽  
...  
Keyword(s):  
Chronic Kidney Disease ◽  
Kidney Disease ◽  
Potential Role ◽  
Circulatory System ◽  
Healthy Adults ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control Group ◽  
Test Results ◽  
Serum And Urine

Abstract Background Renalase is a flavoprotein involved in pathomechanisms of chronic kidney disease and heart and circulatory system disorders. Secretion and way of action of this protein are still discussed. Aim of our study was to initially estimate the balance between serum and urine renalase in healthy adults and to compare obtained ratio to chronic kidney disease patients. Methods Our study involved 28 healthy volunteers and 62 patients with diagnosed chronic kidney disease in stages I to IV. Concentration of renalase in blood serum and urine was measured using enzyme-linked immunosorbent assay (ELISA) kit (Uscn Life Science, Wuhan, China). We analyzed serum-to-urine renalase proportion in both groups and evaluated the differences using Mann Whitney U-test. Results Renalase serum-to-urine ratio was significantly higher in chronic kidney disease patients in comparison with control group (1.146 and 0.177, respectively; p<0.05). Also renalase serum-to-urine/mg creatinine ratio was higher in CKD patients than in healthy subjects (0.863 and 0.176, respectively; p<0.05). In both groups, no correlation between renalase concentration or serum-to-urine ratio, and eGFR, was found. Conclusions Renalase is involved in chronic kidney disease pathomechanism and is highly secreted and cumulated in blood of subjects with chronic kidney disease, what is accompanied by reduction of urinary renalase excretion. This may occur due to the potential role of renalase as a cytokine, preventing further kidney, and probably heart, dysfunction or injury. Chronic kidney disease causes higher expression of renalase, but its balance between serum and urine depends on more factors and conditions, involved in CKD pathomechanism.

Preliminary observations on the production and quality of whole crop wheat

1991 ◽  
Vol 1991 ◽  
pp. 146-146
Author(s):  
R H Phipps ◽  
R F Weller ◽  
H Clark ◽  
A Reeve
Keyword(s):  
Dairy Cow ◽  
Potential Role ◽  
Background Information ◽  
Wheat Crop ◽  
Research Experience ◽  
Practical Application ◽  
Farming Community ◽  
Crop Husbandry

During the last few years there has been increasing interest in the potential role of alternative forages in dairy cow rations based on grass silage. In this context, whole crop cereals, particularly wheat (WCW) treated with urea (40 g/kg DM), have more recently received considerable attention within the farming community. This is in spite of the fact that research experience of the potential of whole crop wheat as a forage component for dairy cow rations is limited.In order to provide general background information on the practical application of this approach, eight farms were surveyed on wheat crop husbandry, harvesting and preservation. Nutritional quality of the resultant forages was also assessed. Additional observations on crop losses during harvesting and feeding were undertaken at the Bernard Weitz Centre.

scholarly journals Natural variation in teosinte at the domestication locus teosinte branched1 (tb1)

2014 ◽  
Author(s):  
Laura Vann ◽  
Thomas Kono ◽  
Tanja Pyhäjärvi ◽  
Matthew B. Hufford ◽  
Jeffrey Ross-Ibarra
Keyword(s):  
Population Genetic ◽  
Potential Role ◽  
Sequence Data ◽  
Strong Association ◽  
Phenotypic Data ◽  
Maize Population ◽  
Teosinte Branched1 ◽  
Genetic Signatures ◽  
Future Work

The teosinte branched1 (tb1) gene is a major QTL controlling branching differences between maize and its wild progenitor, teosinte. The insertion of a transposable element (Hopscotch) upstream of tb1 is known to enhance the gene’s expression, causing reduced tillering in maize. Observations of the maize tb1 allele in teosinte and estimates of an insertion age of the Hopscotch that predates domestication led us to investigate its prevalence and potential role in teosinte. We assessed the prevalence of the Hopscotch element across an Americas-wide sample of 837 maize and teosinte individuals using a co-dominant PCR assay. Additionally, we calculated population genetic summaries using sequence data from a subset of individuals from four teosinte populations and collected phenotypic data using seed from a single teosinte population where Hopscotch was found segregating at high frequency. Genotyping results indicate the Hopscotch element is found in a number of teosinte populations and linkage disequilibrium near tb1 does not support recent introgression from maize. Population genetic signatures are consistent with selection on the tb1 locus revealing a potential ecological role, but a greenhouse experiment does not detect a strong association between the Hopscotch and tillering in teosinte. Our findings suggest the role of Hopscotch differs between maize and teosinte. Future work should assess tb1 expression levels in teosinte with and without the Hopscotch and more comprehensively phenotype teosinte to assess the ecological significance of the Hopscotch insertion and, more broadly, the tb1 locus in teosinte.

scholarly journals Natural variation in teosinte at the domestication locus teosinte branched1 (tb1)

2014 ◽  
Author(s):  
Laura Vann ◽  
Thomas Kono ◽  
Tanja Pyhäjärvi ◽  
Matthew B. Hufford ◽  
Jeffrey Ross-Ibarra
Keyword(s):  
Population Genetic ◽  
Potential Role ◽  
Sequence Data ◽  
Strong Association ◽  
Phenotypic Data ◽  
Maize Population ◽  
Teosinte Branched1 ◽  
Genetic Signatures ◽  
Future Work

The teosinte branched1 (tb1) gene is a major QTL controlling branching differences between maize and its wild progenitor, teosinte. The insertion of a transposable element (Hopscotch) upstream of tb1 is known to enhance the gene’s expression, causing reduced tillering in maize. Observations of the maize tb1 allele in teosinte and estimates of an insertion age of the Hopscotch that predates domestication led us to investigate its prevalence and potential role in teosinte. We assessed the prevalence of the Hopscotch element across an Americas-wide sample of 837 maize and teosinte individuals using a co-dominant PCR assay. Additionally, we calculated population genetic summaries using sequence data from a subset of individuals from four teosinte populations and collected phenotypic data using seed from a single teosinte population where Hopscotch was found segregating at high frequency. Genotyping results indicate the Hopscotch element is found in a number of teosinte populations and linkage disequilibrium near tb1 does not support recent introgression from maize. Population genetic signatures are consistent with selection on the tb1 locus revealing a potential ecological role, but a greenhouse experiment does not detect a strong association between the Hopscotch and tillering in teosinte. Our findings suggest the role of Hopscotch differs between maize and teosinte. Future work should assess tb1 expression levels in teosinte with and without the Hopscotch and more comprehensively phenotype teosinte to assess the ecological significance of the Hopscotch insertion and, more broadly, the tb1 locus in teosinte.

Work characteristics and the emergence of a sustainable workforce: Do job design principles matter?

2006 ◽  
Vol 19 (2) ◽  
Author(s):  
Doris Fay ◽  
Alexandra Kamps
Keyword(s):  
Potential Role ◽  
Readiness To Change ◽  
Design Principles ◽  
Job Design ◽  
Work Characteristics ◽  
Work Related ◽  
Personal Initiative ◽  
Low Levels ◽  
Future Work

Work characteristics and the emergence of a sustainable workforce: Do job design principles matter? Work characteristics and the emergence of a sustainable workforce: Do job design principles matter? Doris Fay & Alexandra Kamps, Gedrag & Organisatie, Volume 19, June 2006, nr. 2, pp. 184. Today's organisations require a workforce with high levels of adaptability and flexibility, that is, a sustainable workforce. Drawing on the notion of socialization through work, this study looks at the potential role of job design for building a sustainable workforce. Drawing on data from 335 individuals from the new German countries, we tested whether levels of desirable attitudes and behaviours are associated with the application of Tayloristic design principles. Perceptions of work characteristics (job control, complexity, task completeness, prescription of one-best-way of doing the job) were used to create groups of work places that differed in degree of Taylorism. Comparison of jobs with high versus low levels of Taylorism showed that individuals with Tayloristic jobs had lower work-related self-efficacy, lower personal initiative, innovativity and readiness to change, and higher levels of control rejection and depression than individuals in less Tayloristic jobs. Implications for changing job demands and future work are discussed.

Potential role of intraspecific and interspecific cloning in the conservation of wild mammals

Zygote ◽  
2019 ◽  
Vol 27 (3) ◽  
pp. 111-117 ◽  
Author(s):  
Alana Azevedo Borges ◽  
Alexsandra Fernandes Pereira
Keyword(s):  
Somatic Cell ◽  
Embryo Development ◽  
Potential Role ◽  
Donor Cell ◽  
Cell Nuclei ◽  
Wild Mammals ◽  
Donor Cells ◽  
Cell Banks ◽  
Future Work

SummaryIntraspecific and interspecific cloning via somatic cell nuclear transfer (iSCNT) is a biotechnique with great possibilities for wild mammals because it allows the maintenance of biodiversity by recovering species, nuclear reprogramming for the production of pluripotency-induced cells, and studies related to embryonic development. Nevertheless, many areas in cloning, especially those associated with wild mammals, are still in question because of the difficulty in obtaining cytoplasmic donor cells (or cytoplasts). Conversely, donor cell nuclei (or karyoplasts) are widely obtained from the skin of living or post-mortem individuals and often maintained in somatic cell banks. Moreover, the creation of karyoplast–cytoplast complexes by fusion followed by activation and embryo development is one of the most difficult steps that requires further clarification to avoid genetic failures. Although difficult, cloning different species, such as wild carnivores and ungulates, can be successful via iSCNT with embryo development and the birth of offspring. Thus, novel research in the area that contributes to the conservation of biodiversity and knowledge of the physiology of species continues. The present review presents the failures and successes that occurred with the application of the technique in wild mammals, with the goal of helping future work on cloning via iSCNT.

scholarly journals Conscientious Objections during COVID-19 Pandemic

2020 ◽  
Vol 32 (2 (Supp)) ◽  
pp. 231-235
Author(s):  
Deepak Gupta
Keyword(s):  
Potential Role ◽  
Intracellular Pathogen ◽  
Intracellular Pathogens ◽  
Test Results ◽  
Historical Evidence ◽  
Potential Therapeutic Role ◽  
Ultraviolet C ◽  
Core Body ◽  
Related Mortality

Globally evolving COVID-19 pandemic has raised major questions which may have catastrophic implications like absence of universal facemask use, misunderstanding implications of SARS-CoV-2 test results, ventilator related mortality, cytokine reduction technology and anti-viral treatments being in their infancy still, failure to update advanced healthcare directives during pandemic, and overlooked home hospice options for COVID-19 patients when terminally ill. Moreover, there are inquisitive and interesting avenues worth exploring and innovating during COVID19 pandemic like “cold” viruses such as SARS-CoV-2 uniquely choosing airways which normally and naturally have temperatures much lower than core body temperatures, potential therapeutic role (if any) of facemask usage, potential role of natural disinfection by sunlight and its component ultraviolet-C which is used for artificial cleansing, potential bimodal immune response against SARS-CoV-2, and exploration into BCG vaccination based non-specific protection against intracellular pathogens with SARS-CoV-2 itself being an intracellular pathogen. Summarily, I am praying that the natural delays in establishing reproducible evidence during COVID-19 pandemic should not turn the humanity as we know today into a historical evidence.

Erosion in the Rectangular Biomass Circulating Fluidized Bed

2012 ◽  
Vol 608-609 ◽  
pp. 214-219
Author(s):  
Jing Hui Song ◽  
Tao Wang ◽  
Jing Gao ◽  
Xian Bin Xiao ◽  
Chang Qing Dong ◽  
...  
Keyword(s):  
Circulating Fluidized Bed ◽  
Volume Fraction ◽  
Rectangular Cross Section ◽  
Core Region ◽  
Front Wall ◽  
Back Wall ◽  
Left Wall ◽  
Phase Volume Fraction ◽  
The Core

Through MFIX software, a three-dimensional numerical gas-solid flow models without chemical reactions is developed to the distributions of solids phase volume fraction and velocities in a 220t/h rectangular cross-section biomass CFB with a height of 3m. The maximum of erosion occurs at the near-wall side at y=0.95m on the front-wall and back-wall. In transition region(0.8-1.4m) of the left-wall and right-wall, typical core-annular regime can be observed, particle in the core region have the tendency to move to the corner. The maximum of erosion occurs at the corner formed between the walls in the role of downward movement of particle. And the lateral movement of particles are obvious enhanced between the core region and back-wall in the role of exit effect, which lead a certain degree of lateral erosion between the core region and back-wall at the left-wall and right-wall.

Sign in / Sign up

Export Citation Format

Share Document