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Register a new userThe light and temperature effect on the development of a mutated species of Saintpaulia ionantha
تأثير الضوء و الحرارة في تنامي إحدى طفرات نبات البنفسج الافريقي Saintpaulia ionantha
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Damascus University ورقة بحثية
Publication date
1998
fields
Biology
and research's language is
العربية
Created by
Shamra Editor
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أظهرت نتائج دراسة الضوء و الحرارة في نمو إحدى طفرات نبات البنفسج الإفريقي و تطورها، الدور الكبير للشدة الضوئية، مقارنة مع الفترة الضوئية، على تّلون الأوراق الجديدة المتشكلة، كما بينت عدم تأثر هذه الأوراق فيما يخص درجة تلونها، بدرجات الحرارة المختلفة، و قد أظهرت هذه النباتات انخفاض المواد الصباغية بنسب متقاربة، و ليس انخفاض مادة من هذه المواد دون الأخرى, أما فيما يتعلق بالمحتوى البروتيني فقد أظهرت النتائج عدم وجود فروق جوهرية فيما يخص العصابات البروتينية بين النوعين الطبيعي و الطافر، إلا أننا وجدنا انخفاضًا بكميات البروتين عند النوع الطافر عنه في النبات الطبيعي.
The results of this study showed the important role of the light intensity compared with the light exposure time on coloring the new formed leaves, also this study had showed that the leaves are not affected by the different temperatures, and also that these plants showed a decrease in the different pigment substances in close proportions. Concerning the amount of proteins, the results have shown main differences in the protein bands between the mutated and the natural species, but we have found a decrease in the amount of proteins in the mutated species than in natural species.
References used
Bohmer. B.; (١٩٩٠): Schadlinge an Saintpaulia. Gartnerborse Gartenwelt
Jungnickel, F. und Gliemerothe ( ١٩٨٦ ) : In vitro - Depots vegetativ vermehrter Blútenpflanzen. wiss. ztschr. Fsu Jena, Math. - Natur wiss. R
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Syria but all over the world.
The producers in Syria and in other countries are suffering during the
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The work conducted here was to investigate the effect of high temperature
on flower development and morphology.
The effect of temperature on the development of the predator Hippodamia variegata
(Coleoptera:Coccinellidae) reared on the green peach aphid Myzus persicae Sulzer
(Homoptera:Aphididae) was determined at five constant temperatures (15, 20, 25, 30
a
nd 35)°C under laboratory conditions. The present study was conducted at Latakia
Agricultural Research Center during 2015 and 2016. This study aimed to determine
the impact of temperature on the development of the predator H. variegata to
identify the suitable temperature for rearing this predator. The duration (days) and
survival (%) were measured for this predator. Results showed that temperature had
a significant effect on the development of H. variegata immature stages, whereas
the development time from larvae to adult decreased with increasing temperature
at thermal range (15-35)°C. The longest larval developmental duration was 24.84 days
at 15°C, and the shortest duration was 4 days at 35°C. Also, the shortest pupal
duration was one day at 35°C and the longest period was 9.84 days at 15°C. The
lowest developmental time from eggs hatching to emergence of adults was 6 days
at 35°C, while the longest developmental time was 36.84 days at 15°C. Also the
ratio of larval survival was affected by temperature, this ratio was (26%, 52%,
77%, 34%, 4%) at (15, 20, 25, 30 and 35)°C respectively. The results of statistical
analysis showed that there were significant differences between the five constant
temperatures in all studied biological characteristics, and the temperature 25°C was
suitable for a successful rearing of the predator H. variegata.
This study was performed in order to determine the temperature
rise under human dentin discs of different thicknesses of primary teeth
during the light curing process with conventional halogen lamp and
LED.
The effect of different concentrations of nitrate and phosphate and soil extract on the
total growth and chemical composition to the green algae Chorella vulgaris isolated from
some localaquatic habitats had studied in this research, at three type
of temperature (30 ,
25, 20), the maximum total growth reached up to 4.66 Cell/h and the lowest duplicated
time was 1.55 h at temperature 25ºC and at concentration of nitrate 1 g/L , 0.05 g/L of
phosphate, and 10/100 mL of soil solution , while the number of cells reached to 59423,61
cell/mL at the day 22 of cultivation.
The chemical composition differed by the changing of temperature and nutrient
medium composition , while the maximum protein content reached to 48.36 % at the
maximum concentration of nutrients and 25 ºC of temperature , the maximal concentration
of lipid was 19,78 % at temperature 25ºC and concentration of nitrate 0.1 g/L and 0.01 of
phosphate and 6/100 mL of soil solution , the concentration of carbohydrates were the
lowest where the maximal ratio was 17.41 % at temperature 20ºC .
Preterm birth is the leading cause of death for children under one year of age, and the main reason for the child to enter the incubator. Despite medical advances and technical winning in the care of premature infants., but they are exposed in Nurser
y Ward for environment stimuli not compatible with their level of developmental and evolutionary such as high levels of light and the noise that exceed the recommended levels in Nursery Ward. This leads to stress reactions by premature immature systems. demonstrating in one of their faces instability in vital indicators especially heart rate and oxygenation which may submit him for a short or long-term injuries .
Aim of the study:
Determine the effect of reducing the level of light and noise intensity in environment of Nursery Ward on the heart rate and oxygenation for premature infants.
Materials & Methods:
This true experimental design study of before and after on a sample of 30 premature acceptable in the Nursery Ward in Albasel Hospital in Tartous. they were selected in simple random way. Data were collected using a list to record demographic and health information for the mother and premature. reads of light-meter and noise-meter sitting beside the premature incubator, and reads of Oxy-meter connected to the premature wrist. was taken to every 5 minutes in each phase of the four phases, 60 minutes for each one, and conducted in the same day.1) Non intervention phase. 2) reduce light Intensity without noise Intensity reduction phase.3) reduce noise Intensity without light Intensity reduction phase.4) reduce light and noise Intensity together phase. These data were collected and analyzed using appropriate statistical programs.
Results:
This study showed a significant decrease in the mean of heart rate and a significant increase in the mean of oxygenation in the last three phases, compared with means in the first phase. This reduction and increase in the means was larger significantly in the fourth stage compared with the second and third phases. That because reducing light and noise will reduce its physiological stress to premature thus lower the pulse rate and increasing oxygenation. We can thus reduce the use of light and noise measures to improve the care environment for premature.
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