scholarly journals Can stress turn trees hair white? Hair covering of stems improves resilience of corticular photosynthesis against heat-stress

2021 ◽  
Author(s):  
Christiane Wittmann ◽  
Barbara Kelsch ◽  
Franziska Reßing ◽  
Hardy Pfanz
Keyword(s):  
Heat Stress ◽  
Linear Regression Analysis ◽  
Protective Role ◽  
Simple Linear Regression ◽  
Outer Bark ◽  
Chlorophyll Fluorescence Parameters ◽  
Corticular Photosynthesis ◽  
Psii Quantum Yield ◽  
Post Stress

AbstractThe hypothesis was tested that hair covering of stems improves resilience of corticular photosynthesis against heat stress. Hairy and non-hairy outer bark ofQuercus ilexL. andQuercus roburL. trees was removed and optical properties measured. Additionally, structural bark traits and chlorophyll fluorescence parameters during heat stress treatment were studied. Optical analysis revealed a protective role of hairy outer bark (OB) against overheating of the underlying cortex of the stems. Hairiness decreased OB transmittance and increased thermal insulation of stems by an increased absorptance and reflectance of OB in the visible (380–720 nm) and an increased reflectance in the infrared part of the spectrum (720–900 nm). Simple linear regression analysis revealed no significant effect of stem structural traits (OB thickness (OBT), cortex density (Dcortex), cortex water content (Wcortex)) on corticular photochemistry (PScort), while optical traits of outer bark were significantly (P < 0.01) correlated with PScort. OB reflectance explained up to 91% of the variation in PSII quantum yield under heat stress. At high temperatures (> 45 °C) PScortof the hairy species showed a higher resilience and a better post-stress-recovery as compared to the non-hairy one. It is concluded that stem hairs play a physiologically significant role in modulating the stem energy balance due to a close interaction between optical characteristics of hairy OB and stem photochemical processes.

scholarly journals Ecossistemas de inovação das universidades federais brasileiras: um mapeamento dos núcleos de inovação tecnológica, incubadoras de empresas de base tecnológica e parques tecnológicos

2019 ◽  
Vol 7 (3) ◽  
pp. 341-358
Author(s):  
Rafael Morais Pereira ◽  
Humberto Rodrigues Marques ◽  
Rodrigo Gava
Keyword(s):  
Technological Innovation ◽  
Linear Regression Analysis ◽  
Secondary Data ◽  
Innovation Systems ◽  
Simple Linear Regression ◽  
Technological Structure ◽  
Technology Parks ◽  
Relationship Of ◽  
The Relationship

Technological innovation as an engine for development requires a structural apparatus to its consolidation, reinforcing the approach of innovation systems, with emphasis on the role of universities. Therefore, considering that associated with this potential are present several innovative elements, such as the Technological Innovation Centers (NITs), the incubators of technology-based companies (IEBTs) and Technology Parks (ParqTecs), and given the lack of systematization National these instruments, the ultimate goal of this study was to analyze the environment for innovation in Brazilian federal universities, through the mapping of NITs, the IEBTs and ParqTecs associated with these institutions, further outlining the relationship of these instruments with technological variables (technological scholarships and patents). We used a qualitative and quantitative approach, descriptive nature, with collection of secondary data on institutional sites of universities and the adoption of simple linear regression analysis. The results realized all 63 Brazilian federal universities and revealed that the most widespread instrument between universities are the NITs, since its presence in 86% of the analyzed institutions. Have business incubators, idealized to strengthen interaction in innovation systems, are associated with 68% of universities, enabling regional development contexts. In relation to technology parks, it was found that, depending on the expenditure required for its implementation, only 26 universities are integrated into ParqTecs. The contributions of this study are concentrated in addition to the mapping done in highlighting the distinctions between the Brazilian regions in terms of scientific and technological structure and the importance of innovation ecosystems.

Role of glutathione on recovery of red-osier dogwood plants from "near-lethal" heat stress

1994 ◽  
Vol 24 (2) ◽  
pp. 415-418 ◽  
Author(s):  
A.M. Shirazi ◽  
J.H. Siller-Cepeda ◽  
L.H. Fuchigami
Keyword(s):  
Heat Stress ◽  
Stress Environment ◽  
Relationship Of ◽  
The Relationship ◽  
Post Stress

This study reports on the relationship of glutathione to the recovery and death of red-osier dogwood, Cornussericea L., plants from "near-lethal" (NL) heat stress. Shoots of dormant red-osier dogwood plants were exposed to 51 °C for 1 h during early February, and then incubated in the dark at either 0 or 23 °C post-stress environment (PSE). In a previous study, NL heat stress treated plants incubated at 23 and 0 °C PSE recovered and died, respectively. Reduced and oxidized forms of glutathione (GSH and GSSG, respectively) were measured with HPLC at 365 nm absorbance after 0 h, 24 h, 2 weeks, and 4 weeks PSE, respectively. Incubation of the NL heat stress treatments for 24 h at 23 ± 3 °C prior to post-treatments resulted in a significant decrease of GSSG and slight decrease of GSH. In contrast, the sudden exposure of NL stressed plants to 0 °C for 24 h resulted in a significant reduction of both GSH and GSSG levels after 2 and 4 weeks incubation. At 23 °C PSE, GSH and GSSG levels of NL heat stressed plants increased, while at 0 °C PSE the levels of both decreased.

scholarly journals PENGARUH LITERASI KEUANGAN TERHADAP PERILAKU KEUANGAN MAHASISWA

2021 ◽  
pp. 127
Author(s):  
Wayan Tari Indra Putri ◽  
Kadek Nita Sumiari
Keyword(s):  
Regression Analysis ◽  
Financial Literacy ◽  
Financial Management ◽  
Linear Regression Analysis ◽  
Financial Inclusion ◽  
Financial Behavior ◽  
Test Results ◽  
Simple Linear Regression ◽  
Literacy Knowledge

Having knowledge of financial literacy is a must in order to have a prosperous life. Currently the OJK is working to improve financial inclusion and literacy, especially among students. This step is a form of effort to increase the role of students in the Indonesian economy. As the next generation, a student must have knowledge related to personal financial management. This knowledge will be very useful for students to manage their finances in the future. Four diploma students majoring in Accounting at the Bali State Polytechnic have obtained courses related to finance and investment so that they should have a good level of financial literacy knowledge. The purpose of this research is to examine the effect of financial literacy on student financial behavior. Respondents in this study amounted to 95 people. The data in this study were analyzed using simple linear regression analysis. The results of this study are that there is an influence between financial literacy variables on student financial behavior. The test results show that the better the knowledge or understanding of financial literacy possessed by students, the better the student's ability to implement good financial behavior.

scholarly journals Pengaruh Peranan Bank Sampah Dalang Collection terhadap Kesejahteraan Karyawan Perspektif Ekonomi Syari’ah

2018 ◽  
Vol 15 (2) ◽  
pp. 42-62
Author(s):  
Rustam Efendi ◽  
Boy Syamsul Bakhri ◽  
Yuhermi Okta Mursi
Keyword(s):  
Quantitative Data ◽  
Linear Regression Analysis ◽  
Problem Formulation ◽  
Test Results ◽  
Simple Linear Regression ◽  
Economic Perspective ◽  
Employee Welfare ◽  
Calculation Process ◽  
Close Relationship

This research is based on the results of pre-research conducted by the writers after looking at “Dalang Collection”  Garbage Bank in Pekanbaru city which is an alternative solution in handling waste in Pekanbaru. Although it was only established in 2012, the “Dalang Collection”  Garbage Bank has been able to empower communities around to become more productive and earn income, especially for mothers. Therefore, the writers are interested in examining the influence of  roles of the “Dalang Collection”  Garbage Bank on employee welfare. The problem formulation of this study is how the “Dalang Collection”  Garbage Bank influences employee welfare and whether the role of the “Dalang Collection”  Garbage Bank on employee welfare is in accordance with the sharia  economic perspective. The research objective was to determine the influence of the role of the “Dalang Collection”  Garbage Bank on the welfare of employees and to know the extent of the influence of the role of the “Dalang Collection” Garbage Bank on employee welfare in accordance with the sharia economic perspective. In analyzing quantitative data, simple linear regression analysis is used where the calculation process uses SPSS for windows version 23.0. The sample of this study was 42 people. The results of this study note the role of “Dalang Collection” Garbage Bank on employee welfare has a very close relationship, this is known from the correlation coefficient of 90.1%. While the partial test results have a significant effect between the role of the ”Dalang Collection” Garbage Bank on employee welfare, it is known from the t-count (13.164) is greater than t-table (1.684). It means that partially it can be seen that the variable X (role) affects the variable Y (employee welfare). Employees of the “Dalang Collection” Garbage Bank have had moral welfare, spiritual welfare and social welfare while material welfare has not been fulfilled so that it cannot be said prosperous according to the sharia economic perception.

scholarly journals Kontribusi keberfungsian keluarga terhadap kesejahteraan subjektif pada remaja etnis Minang

2021 ◽  
Vol 9 (2) ◽  
pp. 142-149
Author(s):  
Jihan Nabilah CS ◽  
Tesi Hermaleni
Keyword(s):  
Family Functioning ◽  
Linear Regression Analysis ◽  
Predictor Variable ◽  
Well Being ◽  
Family Assessment ◽  
Subjective Well Being ◽  
Simple Linear Regression ◽  
Family Assessment Device ◽  
Selection Of

The studies show that culture and family functioning have a contribution to the well-being of youth. Ethnic Minang with matrilinear culture and collective owned, of course, also plays a role in teenagers’ lives. Researchers aim to test the role of a family’s functioning towards adolescents’ subjective well-being in the Minang ethnicity. The design of this study is quantitative with the selection of samples in the form of purposive sampling. Participants in the study were 315 ethnic Minang adolescents who had filled out questionnaires containing Family Assessment Device and subjective well-being scales. A simple linear regression analysis test shows that family functioning contributes to subjective well-being in ethnic Minang youth (R2 = 0.177, F=67.347, p=0.000). That is, family functioning as a predictor variable contributed 17.7% to subjective well-being. The more optimal the functioning of a family, the more its members feel prosperous.

scholarly journals PERANAN SUASANA KERJA TERHADAP KEINGINAN PINDAH KERJA PADA KARYAWAN PT HASNUR JAYA UTAMA

Jurnal Ecopsy ◽  
2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Maya Irka Anggriani ◽  
Hemy Heryati Anward ◽  
Rooswita Santia Dewi
Keyword(s):  
Job Satisfaction ◽  
Correlation Coefficient ◽  
Random Sampling ◽  
Linear Regression Analysis ◽  
Coefficient Of Determination ◽  
Simple Linear Regression ◽  
Close Relationship ◽  
The Relationship ◽  
Selection Of

Penelitian ini bertujuan untuk mengetahui ada tidaknya peranan suasana kerja terhadap keinginan pindah kerja karyawan. Populasi pada penelitian ini yaitu seluruh karyawan PT. Hasnur Jaya Utama. Jenis pengambilan sampel yang dilakukan pada penelitian ini adalah Purposive Random Sampling yaitu pemilihan sampel secara acak sesuai dengan karakteristik yang ditentukan berdasarkan tujuan penelitian yang berjumlah 60 orang.  Sedangkan metode pengumpulan data dengan menggunakan skala suasana kerja, skala kepuasan kerja dan kuesioner keinginan pindah kerja. Dalam penelitian ini analisis data menggunakan analisis regresi linear sederhana. Hasil analisis peranan suasana kerja terhadap kepuasan kerja, diperoleh koefisien korelasi R sebesar 0,759 artinya hubungan suasana kerja dan kepuasan kerja erat. Ditemukan juga koefisien determinasi (R2) yang menunjukkan peranan suasana kerja terhadap kepuasan kerja sebesar 57,5% dan untuk analisis t observasi (8,882) > t tabel (1,672) menunjukkan  ada peranan suasana kerja terhadap kepuasan kerja. Kemudian, hasil analisis peranan kepuasan kerja terhadap keinginan pindah kerja ditemukan koefisien regresi R (0,680) artinya kepuasan kerja dan keinginan pindah kerja memiliki hubungan yang cukup erat. Selanjutnya, diperoleh juga (R2) yang menunjukkan peranan kepuasan kerja terhadap keinginan pindah kerja sebesar 46,3%  dan   untuk  analisis   t   observasi (-7,069) t tabel (1,672) menunjukkan ada peranan kepuasan kerja terhadap keinginan pindah kerja dengan signifikan negatif. Berdasarkan hasil penelitian tersebut maka dapat ditarik kesimpulan bahwa suasana kerja dan kepuasan kerja pada karyawan perlu diperhatikan oleh perusahaan agar dapat meminimalkan keinginan pindah kerja karyawan. Kata Kunci: Suasana kerja, kepuasan kerja, keinginan pindah kerjaThis study purposed to determine whether there is the influence of the working atmosphere to intention turnover on employees. The population in this study are all employees of PT. Hasnur Jaya Utama. Type of sampling conducted in this study is Purposive Random Sampling is the selection of a random sample according to the characteristics that are determined based on the research goals of 60 people. The methods of data collection by using the scale of the working atmosphere, the scale of job satisfaction and intention turnover questionnaire. In this study analyzes the data using simple linear regression analysis. The results of the analysis of the influence of working atmosphere to job satisfaction, the correlation coefficient R of 0.759 means that the relationship working atmosphere and job satisfaction is quite close. Also found the coefficient of determination (R2) which indicates the role of working conditions on job satisfaction at 57.5% and for the analysis of observation (8.882) > t table (1.672) which indicates means that the influence of the atmosphere to job satisfaction. Then, the results of the analysis of the influence of job satisfaction to intention turnover a correlation coefficient R (0.680) means that job satisfaction and intention turnover to have a close relationship. Furthermore, also obtained (R2 ) which indicates the role of job satisfaction to intention turnover of 46,3% and for the analysis of t observation (-7.069) > t table (1.672) which indicates means that the influence of job satisfaction to intention turnover with a significant negative . Based on these results it can be concluded that the working atmosphere and job satisfaction in employees need to be considered by the company in order to minimize intention turnover ob the employees. Keywords: The working atmosphere, job satisfaction, intention turnover.

scholarly journals Protective role of cytokinin under the heat stress on wheat plants

2014 ◽  
Vol 71 (2) ◽  
pp. 244-249 ◽  
Author(s):  
M.M. Musienko ◽  
V.V. Zhuk ◽  
L.M. Batsmanova
Keyword(s):  
Heat Stress ◽  
Protective Role
Sign in / Sign up

Export Citation Format

Share Document