scholarly journals COVID-19 INFECTION AND DRASTIC DECREASE IN CD4

CHEST Journal ◽  
2021 ◽  
Vol 160 (4) ◽  
pp. A470
Author(s):  
Mirjana Petrovic Elbaz ◽  
Zinobia Khan ◽  
Moses Bachan ◽  
Robert Siegel
Keyword(s):  
Drastic Decrease

RELIABILITY ASSESSMENT OF AXIALLY COMPRESSED COMPOSITE CYLINDRICAL SHELLS WITH RANDOM IMPERFECTIONS

2011 ◽  
Vol 11 (02) ◽  
pp. 215-236 ◽  
Author(s):  
MATTEO BROGGI ◽  
ADRIANO CALVI ◽  
GERHART I. SCHUËLLER
Keyword(s):  
Mathematical Models ◽  
Axial Compression ◽  
Cylindrical Shells ◽  
Reliability Assessment ◽  
Buckling Analysis ◽  
Buckling Load ◽  
Experimental Results ◽  
Drastic Decrease ◽  
Different Types ◽  
Probability And Statistics

Cylindrical shells under axial compression are susceptible to buckling and hence require the development of enhanced underlying mathematical models in order to accurately predict the buckling load. Imperfections of the geometry of the cylinders may cause a drastic decrease of the buckling load and give rise to the need of advanced techniques in order to consider these imperfections in a buckling analysis. A deterministic buckling analysis is based on the use of the so-called knockdown factors, which specifies the reduction of the buckling load of the perfect shell in order to account for the inherent uncertainties in the geometry. In this paper, it is shown that these knockdown factors are overly conservative and that the fields of probability and statistics provide a mathematical vehicle for realistically modeling the imperfections. Furthermore, the influence of different types of imperfection on the buckling load are examined and validated with experimental results.

Effect of Certain Quinones, Diquat, and Diuron on Chlorella pyrenoidosa Chick. (Emerson strain)

Weed Science ◽  
1968 ◽  
Vol 16 (1) ◽  
pp. 69-73 ◽  
Author(s):  
G. Zweig ◽  
J. E. Hitt ◽  
R. McMahon
Keyword(s):  
Chlorophyll Content ◽  
Oxygen Evolution ◽  
Physiological Activity ◽  
Chlorophyll Concentration ◽  
Chlorella Pyrenoidosa ◽  
Inhibitory Effect ◽  
Cell Number ◽  
Drastic Decrease ◽  
Oxygen Evolving

The effect of 1,4-naphthoquinone, 1,4-benzoquinone, and several CI and NH2-substituted quinones has been studied on growth, chlorophyll concentration, and oxygen evolution in Chlorella pyrenoidosa Chick. (Emerson strain). Drastic decrease of the studied parameters usually was noted after 24 to 48 hr treatment at 3×10–5 M concentration. The effect of the quinones was compared with that of 6,7-dihydrodipyrido [l,2-a:2,l-c-]pyrazidinium salt (diquat) and 3-(3,4-dichlorophenyl)-l,l-dimethylurea (diuron). Diuron inhibited oxygen evolution immediately after addition, but could be washed out and the effect was reversible. Diquat had no inhibitory effect on oxygen evolution and chlorophyll content but caused a slight decrease in cell number. Although some quinones have an almost immediate effect on the oxygen-evolving mechanism, it seems more likely that the overall effect of the quinones is on the total physiological activity of the algal cells. Oxygen evolution seems to affected earlier than chlorophyll destruction, and the observed long-term damage is irreversible. Most of the compounds studied could be classified as algicidal, with the exception of diuron, diquat, and 1,4-benzoquinone which may be considered to be algistatic.

Genes for a Nuclease and a Protease Are Involved in the Drastic Decrease in Cellular RNA Amount in Fission Yeast Cells during Nitrogen Starvation

2002 ◽  
Vol 131 (3) ◽  
pp. 391-398 ◽  
Author(s):  
A. Nakashima ◽  
M. Yoshida ◽  
K. Nakayama ◽  
A. Kato-Furuno ◽  
M. Ueno ◽  
...  
Keyword(s):  
Fission Yeast ◽  
Nitrogen Starvation ◽  
Yeast Cells ◽  
Drastic Decrease

A substantial change in breast cancer (BC) biology arises after 50 years old regardless of patient (pt) menopausal status

2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 21002-21002
Author(s):  
I. Veys ◽  
V. Durbecq ◽  
L. Ameye ◽  
C. Desmedt ◽  
M. Paesmans ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Menopausal Status ◽  
Luminal A ◽  
Tumor Grading ◽  
Biological Difference ◽  
Ki67 Expression ◽  
Drastic Decrease ◽  
Before And After ◽  
Grade 3 ◽  
Substantial Change

21002 Background: To explore the hypothesis that ageing alters BC biology, we correlated pt age at diagnosis with biopathological data collected retrospectively from 2723 BC pts treated at the Bordet Institute between 2000 and 2003. Pt's characteristics: Median pts’ age was 56 years old [25–96] and 36% of pt had nodal invasion. Seventy-eight and 63% of the BC were ER+ and PR+ respectively, 33% were grade 3, 24% overexpressed Ki67 (>25%) and 8% were Her2 FISH+. Results: Pts <40 years old had the highest Her2 FISH+ (12%) and hormone-independent (39%) BC rates. More than 50% of the BC were undifferentiated (grade 3) and highly proliferative (Ki67>25%). Moreover, lobular BC were almost absent in young pts (p<.0001); in agreement with the fact that lobular BC were less aggressive than ductal ones (less grade 3, Her2 FISH+ and ER- BC; p<.0001). Hence pts <40 years had a statistically higher rate of “Her2” and “basal-like” BC subtypes. On the contrary, pts >50 years had ‘better prognostic luminal-A” BC with 60% of hormone-dependent BC and a significant drastic decrease of Ki67 expression, tumor grading and Her2 FISH+ (all p=.002). No biological difference was observed between BC of pts >50 years. However, in this group we observed that high ER scores (7–8 vs 3–6) were statistically associated with Her2 FISH- and PR+ characteristics (all p<.0004). Interestingly, the 40–50 years old group which contains 16% of postmenopausal pts, appeared as a transition group according to its biology. Nevertheless, no statistically biological difference could be observed between the BC of pre- and postmenopausal pts. Additionally, when considering the postmenopausal pts from all ages, a clear difference was observed for the different parameters between tumors from pts <50 years compared to older ones (ER, p=.046; grade, p=.0007; Ki67, p=.0001), suggesting that age, and not the menopausal status, is responsible for changes in BC biology Conclusions: BC biology is greatly different in pts before and after the age of 50 but after 50 years old, all pts have BC with similar characteristics. Nevertheless, menopausal status can not account by itself to all these differences and pt ageing appears to have a great impact on BC biology (i.e. Her2 FISH+). No significant financial relationships to disclose.

The Nature of Intermetallic Compounds and its Effect on Mechanical Properties of Cu/Al/Cu Clad Metals

2014 ◽  
Vol 951 ◽  
pp. 87-91 ◽  
Author(s):  
Won Nyeon Kim ◽  
Sun Ig Hong
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Intermetallic Compounds ◽  
Interfacial Reaction ◽  
Reaction Layer ◽  
Drastic Decrease ◽  
Interfacial Cracks ◽  
Clad Metals ◽  
Reaction Compound ◽  
Intermetallic Layers

The mechanical properties and microstructure of layered Cu/Al/Cu composites was investigated after annealing at various temperatures. The nature of intermetallic compounds in roll-bonded Cu/Al/Cu clad metals after heat treatment was investigated using SEM, XRD and EBSD.in the temperature range 200~500oC. In the roll-bonded 3-ply Cu/Al/Cu clad metal, no visible interfacial reaction compound and defects were observed at the interfaces. The reaction layer was observed grow rapidly at the Cu/Al interface after annealing at and above 400oC, which deteriorated the ductility of clad metals. Intermetallic reaction layers of Cu/Al/Cu clad materials annealed at 500oC for 3, 5, 10hours was found to consist of three layers, CuAl2, CuAl and Cu9Al4. EBSD analyses revealed that intermetallic layers are polycrystalline. The drastic decrease of stress and elongation in Cu/Al/Cu clad composite annealed at 500oC can be linked to the interfacial cracks between Al and Cu layer.

scholarly journals Konsep Protokol Kesehatan Wisata Edukasi Pada Daya Tarik Wisata Yayasan Tukad Bindu selama masa Pandemi Covid-19

2021 ◽  
Vol 2 (2) ◽  
pp. 115-122
Author(s):  
I Gusti Ngurah Pertu Agung ◽  
Ni Made Rai Kristina ◽  
I Gusti Ketut Indra Pranata Darma ◽  
Astrid Krisdayanthi ◽  
Ida Anuraga Nirmalayani
Keyword(s):  
Local Community ◽  
Tourism Development ◽  
Learning Model ◽  
Tourist Attraction ◽  
Drastic Decrease ◽  
Educational Tourism ◽  
Qualitative Descriptive ◽  
Fast Flow ◽  
Descriptive Method

Educational tourism as one of the development sectors of tourism is based on the community's need for educational variations. Educational tourism is suitable to be developed in locations that have limited locations and are in areas with residents. Tukad Bindu, as one of the densely populated areas in Denpasar, has the potential to develop educational tourism. The fast flow of the river becomes an attraction and strength in the tourism development needed by the local community. The learning model and the introduction of caring for nature can be applied to the tourist attraction of Tukad Bindu. In its development, the arrival of Covid-19 also affected the visit to the tourist attraction of Tukad Bindu which was seen in a drastic decrease in domestic tourists for almost 8 months. Strategic steps are needed in adapting the covid-19 virus so that the tourist attraction of Tukad Bindu can still run. This study aims to obtain a standard health protocol that can be done in entering the area of Tukad Bindu tourist attraction using a qualitative descriptive method. The results of the research can be used in application during the Covid-19 pandemic, so that people can still visit the tourist attraction of Tukad Bindu by following the applicable protocol.

scholarly journals DAMPAKPANDEMITERHADAP USAHA MIKRO PARTNER GRAB-FOODDI KELURAHAN KETINTANG SURABAYA

2020 ◽  
Vol 3 (2) ◽  
pp. 338-344
Author(s):  
Fitoni Mahmuddin ◽  
Keyword(s):  
Business Owners ◽  
Drastic Decrease ◽  
Before And After ◽  
The Government ◽  
The Impact

The policies issued by the government to prevent the spread of COVID-19 have an impact on the economy, including the micro economy. This study was made with the aim ofknow-ing the impact of policies in handling pandemics and the factors that affect the income of micro business owners who partner with grabfood as well as to compare the income earned before and after the pandemic and to find out how the application of technology impacts traders in Ketintang Surabaya during the pandemic. This research uses descriptive quali-tative method. The results showed that the policies during the pandemic had an impact on micro businesses in the form of a drastic decrease in the number of buyers, decreased in-come and business closures.Keywords: Pandemic,Micro Busines

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