Effect of light intensity during extended photoperiod on growth of amabilis fir, mountain hemlock, and white and Engelmann spruce seedlings

1979 ◽  
Vol 9 (1) ◽  
pp. 82-89 ◽  
Author(s):  
J. T. Arnott
Keyword(s):  
High Pressure ◽  
Light Intensity ◽  
Growth Response ◽  
Significant Positive Effect ◽  
Engelmann Spruce ◽  
Bud Set ◽  
Terminal Bud ◽  
Positive Effect ◽  
Minimum Intensity ◽  
Effect Of Light

Abiesamabilis (Dougl.) Forbes, Tsugamertensiana (Bong.) Carr., Piceaglauca (Moench) Voss, and Piceaengelmannii Parry seedlings were grown in an outdoor container nursery using one high-pressure sodium vapor lamp to provide a 24-h photoperiod. Eight intensities of lighting were arranged, viz., 220, 80, 40, 20, 12, 8, 5, and 0 lx.Extending the photoperiod and increasing the light intensity had a significant positive effect on the length and weight of seedling shoots and delayed terminal bud set. Root growth response to these treatments was negative, although the differences were rarely significant. Seedlings grown under a light intensity of 220 lx were the largest. The minimum intensity required to produce seedling shoot lengths which were significantly larger than the controls was in the range 20–80 lx.

Effect of supplemental light intensity on white spruce, Engelmann spruce, and mountain hemlock seedlings grown under an extended photoperiod

1985 ◽  
Vol 15 (2) ◽  
pp. 295-300 ◽  
Author(s):  
J. T. Arnott ◽  
D. E. Macey
Keyword(s):  
Light Intensity ◽  
Root Weight ◽  
Forming Process ◽  
Engelmann Spruce ◽  
Light Intensities ◽  
Terminal Bud ◽  
Collar Diameter ◽  
Shoot Weight ◽  
Terminal Buds ◽  
Sodium Vapour

Piceaglauca (Moench) Voss, Piceaengelmannii Parry and Tsugamertensiana (Bong.) Carr. were grown in an unheated "shelterhouse" container nursery, with a high pressure sodium vapour lamp providing a 19-h photoperiod and light intensities of 1600, 800, 400, 200, and 100 lx. The control seedlings received natural daylight and photoperiod. None of the light intensities effectively prevented terminal bud formation in the first two species while no terminal buds were formed at the 1600 lx level in the third one. Higher light intensities delayed the bud forming process in the first and third species, produced significant differences in the number of stem units of the first two, and resulted in larger mean stem unit lengths of the last two species. The longest seedling shoots of all three species were grown under light intensities of 800, 100, and 400 lx, respectively. There were no significant differences in seedling shoot weight, root weight, and root collar diameter among the five light intensity levels used to extend the photoperiod in the first growing season. Light intensity had little effect on 2-year shoot growth of all three species.

scholarly journals Axillary Budbreak in a Cut Rose Crop as Influenced by Light Intensity and Red:far-red Ratio at Bud Level

2014 ◽  
Vol 139 (2) ◽  
pp. 131-138 ◽  
Author(s):  
A. Maaike Wubs ◽  
Ep Heuvelink ◽  
Leo F.M. Marcelis ◽  
Gerhard H. Buck-Sorlin ◽  
Jan Vos
Keyword(s):  
Light Intensity ◽  
Incident Light ◽  
Red Light ◽  
Axillary Buds ◽  
Light Spectrum ◽  
Correlative Inhibition ◽  
Whole Plants ◽  
Positive Effect ◽  
Cut Rose ◽  
Effect Of Light

When flower-bearing shoots in cut rose (Rosa ×hybrida) are harvested, a varying number of repressed axillary buds on the shoot remainder start to grow into new shoots (budbreak). Earlier experiments indicated that light reaching the bud affected the number of budbreaks. In all these studies, whole plants were illuminated with different light intensities or light spectra. The aim of this article is to disentangle the effects of light intensity and light spectrum, in this case red:far-red ratio, at the level of the buds on budbreak in a rose crop. Three experiments were conducted in which light intensity and red:far-red ratio at the level of the buds were independently varied, whereas intensity and red:far-red ratio of incident light on the crop were not changed. Light intensity and red:far-red ratio at the position of the buds were quantified and related to budbreak on the shoot remainders. Removal of vertical shoots increased light intensity and red:far-red ratio as well as budbreak (1.9 budbreaks per shoot remainder compared with 0.4 budbreaks when five vertical shoots were present). No vertical shoots and red light-absorbing shading paper over the plant base mimicked the effect of vertical shoots with respect to light intensity and red:far-red ratio, but budbreak (1.0 budbreaks) was intermediate compared with treatments with and without shoots. This suggested that the presence of shoots exerts an inhibiting effect on budbreak through both effects on light at the bud and correlative inhibition. When plants had no vertical shoots and light intensity and red:far-red ratio at bud level were changed by neutral and red light-absorbing shading paper, there was a positive effect of light intensity on budbreak (0.3 more budbreaks per shoot remainder) and no effect of red:far-red ratio. Combinations of high and low light intensity with high and low red:far-red ratio on axillary buds showed that there was a positive effect of light intensity on budbreak (0.5 more budbreaks per shoot remainder) and no effect of red:far-red ratio. Our study reveals that when light intensity and red:far-red ratio received by the plant are similar but differ at bud level, budbreak was affected by light intensity and not by red:far-red ratio.

Effect of light intensity on the ultrastructure of the filamentous cyanobacterium, Anabaena variabilis

1988 ◽  
Vol 46 ◽  
pp. 300-301
Author(s):  
C. S. Bricker ◽  
S. R. Barnum ◽  
B. Huang ◽  
J. G. Jaworskl
Keyword(s):  
Fatty Acid ◽  
Light Intensity ◽  
Acid Content ◽  
Fatty Acid Content ◽  
Anabaena Variabilis ◽  
Chloroplast Envelope ◽  
Major Constituent ◽  
Filamentous Cyanobacterium ◽  
Photosynthetic Membrane ◽  
Effect Of Light

Cyanobacteria are Gram negative prokaryotes that are capable of oxygenic photosynthesis. Although there are many similarities between eukaryotes and cyanobacteria in electron transfer and phosphorylation during photosynthesis, there are two features of the photosynthetic apparatus in cyanobacteria which distinguishes them from plants. Cyanobacteria contain phycobiliproteins organized in phycobilisomes on the surface of photosynthetic membrane. Another difference is in the organization of the photosynthetic membranes. Instead of stacked thylakolds within a chloroplast envelope membrane, as seen In eukaryotes, IntracytopIasmlc membranes generally are arranged in three to six concentric layers. Environmental factors such as temperature, nutrition and light fluency can significantly affect the physiology and morphology of cells. The effect of light Intensity shifts on the ultrastructure of Internal membrane in Anabaena variabilis grown under controlled environmental conditions was examined. Since a major constituent of cyanobacterial thylakolds are lipids, the fatty acid content also was measured and correlated with uItrastructural changes. The regulation of fatty acid synthesis in cyanobacteria ultimately can be studied if the fatty acid content can be manipulated.

Estimasi Pengaruh Faktor Internal Bank dan Stabilitas Makroekonomi terhadap Profitabilitas dengan Mediasi Rasio Pembiayaan Bermasalah di PT Bank Muamalat Indonesia

2020 ◽  
Vol 3 (2) ◽  
pp. 93-108
Author(s):  
Annisa Siti Fathonah ◽  
Dadang Hermawan
Keyword(s):  
Secondary Data ◽  
Financial Statements ◽  
Significant Positive Effect ◽  
Return On Assets ◽  
Internal Factors ◽  
Macroeconomic Factors ◽  
Operating Income ◽  
Significant Negative Effect ◽  
Negative Effect ◽  
Positive Effect

This study aims to determine and analyze how much influence the bank's internal factors such as Equity, Operational Costs per Operating Income (BOPO), Financing Deposit to Ratio (FDR), Non Performing Financing (NPF) as a mediator and external or macroeconomic factors namely inflation and Gross Domestic Product (GDP) on profitability represented by Return on Assets (ROA) at Bank Muamalat Indonesia for the period 2008-2018. The data used in this research are secondary data obtained from the publication of quarterly financial statements from 2008 to quarter 2 of 2018. The method that used in this research is path analysis with SPSS 20.0 as the analytical tool. The results of the study partially test the hypothesis (t-test), in substructure I shows that the capital variable has a significant negative effect on NPF, BOPO and inflation has a significant positive effect on NPF, FDR and GDP do not significantly influence NPF at Bank Muamalat Indonesia. In substructure II partially, Capital, BOPO, significant negative effect on ROA, FDR and NPF has a significant positive effect on ROA, Inflation and GDP does not significantly influence ROA while simultaneously significantly influencing ROA. Based on the sobel test, capital has a significant effect on ROA through NPF, BOPO has a significant effect on ROA through NPF, FDR has a significant effect on ROA through NPF, Inflation has a significant effect on ROA through NPF, while GDP has no significant effect on ROA through NPF.

Kredit Bermasalah sebagai Pemoderasi Pengaruh Tingkat Penyaluran Kredit terhadap Profitabilitas

2020 ◽  
Vol 5 (1) ◽  
pp. 52
Author(s):  
Sukirno Sukirno
Keyword(s):  
Research Method ◽  
Quantitative Research ◽  
Stock Exchange ◽  
Survey Methods ◽  
Analytical Tool ◽  
Significant Positive Effect ◽  
Purposive Sampling ◽  
The Relationship ◽  
Positive Effect

Abstract This study aims to empirically challenge the moderation of Non-Performing Loans to the effect of Credit Distribution Rates on Profitability. The population of 81 bank companies listed on the Indonesia Stock Exchange in the period 2014-2018 and which met the criteria of the research sample (purposive sampling) were 22 companies. The research method uses survey methods with quantitative research approaches, the analytical tool used is moderation regression. This study concludes that the level of credit distribution has a significant positive effect on profitability and the existence of the problem loan variable is proven to be a moderating variable that weakens the relationship between the level of credit distribution and profitability.    

Consumption Emotions and Consumer Values among Turkish Consumers during the COVID-19 Pandemic

2020 ◽  
Vol 8 (2) ◽  
pp. 135-160
Author(s):  
Nevin Karabiyik Yerden
Keyword(s):  
Questionnaire Survey ◽  
Sampling Method ◽  
Significant Positive Effect ◽  
Consumption Emotions ◽  
The World ◽  
Consumer Values ◽  
Convenience Sampling ◽  
Business Structures ◽  
Consumer Lifestyles ◽  
Positive Effect

The COVID 19 pandemic created economic havoc around the world. Along with healthcare challenges, the pandemic has also been changing consumer lifestyles. It affects business structures and service delivery too. This article draws on an investigation of the effect of consumption emotions of Turkish consumers on consumer values during the COVID 19 Pandemic. A convenience sampling method was adopted in the study and a questionnaire survey was administered to collect 390 consumer cases. The results show that the consumption emotions of Turkish consumers during the COVID 19 Pandemichad a significant positive effect on consumer values. It was found that Turkish consumers were to feel anxiety, calmness and hope more often than not during the pandemic.

Effect of light intensity and water aging on surface hardness of dental resin-composites

2019 ◽  
Vol 64 (11) ◽  
pp. 1007-1014
Author(s):  
Tong XU ◽  
◽  
Jia-Hui ZHANG ◽  
Zhao-Ying LIU ◽  
Xuan LI ◽  
...  
Keyword(s):  
Light Intensity ◽  
Surface Hardness ◽  
Resin Composites ◽  
Dental Resin ◽  
Dental Resin Composites ◽  
Effect Of Light

Effect of Compensation and Work Environment on Employee Performance with Employee Job Satisfaction as an Intervening Variable

2018 ◽  
Vol 9 (03) ◽  
pp. 20553-20562
Author(s):  
Putu Ayu Diah Juliarti ◽  
Anak Agung Putu Agung ◽  
I Nengah Sudja
Keyword(s):  
Job Satisfaction ◽  
Work Environment ◽  
High Performance ◽  
Employee Performance ◽  
Statistical Tests ◽  
Path Coefficient ◽  
Significant Positive Effect ◽  
Organizational Goals ◽  
Record Keeping ◽  
Positive Effect

An employee who has a high performance and better able to support the achievement of the goals and objectives set by the company. Employees can work well if you have a high performance that can produce good work anyway. With the high- performance that employees, is expected to achieve organizational goals. This study examines the effect of compensation and work environment on employee performance with job satisfaction to be intervening variable. Data on compensation, work environment, job satisfaction, and employee performance obtained through observation, record keeping and questioner with respondents. The data obtained are then analyzed using Partial Least Squares (PLS). Statistical tests results showed  (1) the compensation proved significant positive effect on job satisfaction the path coefficient of 0.434 and T-Stats for 4.880, (2) work environment proved to be a significant positive effect on job satisfaction the path coefficient of 0.434 and T-Stats for 4.074, (3) job satisfaction proved to be a significant positive effect on employee performance the path coefficient of 0.264 and T-Stats for 2.458, (4) compensation proved positive and significant effect employee performance the path coefficient of 0.242 and T-Stats for 2.912, (5) work environment proved positive and significant effect employee performance the path coefficient of 0.378 and T-Stats for 3.343. Based on test results obtained statistical results of all variables positive and signicant impact.

Pengaruh desain produk dan harga terhadap minat beli konsumen mebel jati jepara pada Toko Usaha Baru Furniture di Lubuk Alung

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Sutiyem Sutiyem ◽  
Thesa Alif Ravelby ◽  
Dessy Trismiyanti
Keyword(s):  
Product Design ◽  
Significant Influence ◽  
Design Variable ◽  
Quantitative Research ◽  
Coefficient Of Determination ◽  
Purchase Decision ◽  
Significant Positive Effect ◽  
Consumer Interest ◽  
Spss Software ◽  
Positive Effect

This study aims to determine the effect of product design and price on consumer interest in buying Jepara Teak furniture at the New Furniture Business Shop in Lubuk Alung. This type of research is associative quantitative research, the number of research samples were 100 people. Data was collected in the form of questionnaires and using analyzed SPSS software ver.21.0 for Windows. The conclusions from this study is the product design variable (X1) has a significant positive effect on purchase decision in Jati Jepara furniture at the New Furniture Business Shop in Lubuk Alung, as evidenced by t value > t table (10,400> 1,660) and a significant influence between price variables ( X2) purchase decision with t value> t table (2,015> 1,660). There is a positive and significant influence between product design (X1) price (X2), on purchase decision of Jati Jepara furniture consumers with an F-value 156,644> F- table (3,09) means that it affects together. The coefficient of determination (R²) results obtained a coefficient of 0.764 or 76.4%, while 23.6% is influenced by other variables.Keywords: Product design; prices; purchase decision.

ANALISIS DETERMINASI PENGHAMBAT PELAPORAN AKUNTANSI SUMBER DAYA MANUSIA

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Amir Hamzah
Keyword(s):  
Human Resources ◽  
Human Resource ◽  
Variable Cost ◽  
Significant Positive Effect ◽  
Microfinance Institutions ◽  
Sample Number ◽  
Human Resource Accounting ◽  
Resource Accounting ◽  
Accounting Report ◽  
Positive Effect

This study aims to analyze the determination of inhibiting reporting of human resource accounting at Shariah microfinance institutions in Kuningan Regency, with the sample number of 70 respondents of shariah microfinance institutions.��������� This study used a qualitative descriptive research method and verification with interview or questionnaire technique. Research data were tested using instrument test, classical assumption test, multiple regression test.��������� The results showed partially variable cost of human resources have a significant positive effect on human resources accounting report, variable measurement of human resources value has a significant positive effect on the human resources accounting report and together show that the variable cost of human resources and measurement value human resources to the accounting reports of human resources.�Keywords: Human Resource Cost, Human Resource Measurement Value, Human Resource Accounting Report

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