scholarly journals Nectar secretion of Callistemon citrinus (Curtis) Skeels, Myrtaceae: Potential for honey production

2021 ◽  
Vol 3 (2) ◽  
pp. 30-36
Author(s):  
Tura Bareke ◽  
◽  
Tesfaye Abera ◽  
Admassu Addi ◽  
◽  
...  
Keyword(s):  
Production Capacity ◽  
Effect Of Temperature ◽  
Nectar Secretion ◽  
Financial Return ◽  
Individual Tree ◽  
Nectar Volume ◽  
Honey Production ◽  
A Value ◽  
Mesh Bags ◽  
Honey Yield

The honey production capacity of bee flora is used to estimate the optimum colony carrying capacity of given area that helps to harvest the best honey yield. The research was conducted to quantify the nectar secretion pattern, the effect of temperature and humidity on dynamics of nectar secretion, and honey production capacity of Callistemon citrinus. One day before nectar collection, five inflorescences were enclosed with mesh bags on different branches of the tree. From these, twenty flowers were randomly selected per tree for the measurement of nectar volume. Additionally, nectar volume and concentration, temperature, and air humidity were measured with an interval of one hour. One way ANOVA and linear regression were used for data analysis. The average amount of nectar and its concentration were different significantly within the time of the day. Nectar amount was correlated positively with humidity while concentration was negatively correlated with temperature. The average nectar volume (µl) per flower in 24 hours, sugar amount per tree (kg), honey yield per individual tree (kg) and honey production capacity of Callistemon citrinus per hectare were 10.9+0.4, 0.65, 0.79, and 1264 kg (46-3808 kg), respectively. The real expected honey yield was 632 kg ha-1. Total financial return was estimated to be $4424 based on a value of $7 kg-1 of Callistemon citrinus honey. Therefore, the multiplication and plantation of this plant are suggested for honey production.

scholarly journals Exploiting RNA thermometer-driven molecular bioprocess control as a concept for heterologous rhamnolipid production

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Philipp Noll ◽  
Chantal Treinen ◽  
Sven Müller ◽  
Lars Lilge ◽  
Rudolf Hausmann ◽  
...  
Keyword(s):  
High Titer ◽  
Production Capacity ◽  
Batch Process ◽  
Product Formation ◽  
Effect Of Temperature ◽  
Industrial Biotechnology ◽  
Temperature Sensitive ◽  
Translation Control ◽  
Rhamnolipid Production ◽  
Rna Thermometer

AbstractA key challenge to advance the efficiency of bioprocesses is the uncoupling of biomass from product formation, as biomass represents a by-product that is in most cases difficult to recycle efficiently. Using the example of rhamnolipid biosurfactants, a temperature-sensitive heterologous production system under translation control of a fourU RNA thermometer from Salmonella was established to allow separating phases of preferred growth from product formation. Rhamnolipids as bulk chemicals represent a model system for future processes of industrial biotechnology and are therefore tied to the efficiency requirements in competition with the chemical industry. Experimental data confirms function of the RNA thermometer and suggests a major effect of temperature on specific rhamnolipid production rates with an increase of the average production rate by a factor of 11 between 25 and 38 °C, while the major part of this increase is attributable to the regulatory effect of the RNA thermometer rather than an unspecific overall increase in bacterial metabolism. The production capacity of the developed temperature sensitive-system was evaluated in a simple batch process driven by a temperature switch. Product formation was evaluated by efficiency parameters and yields, confirming increased product formation rates and product-per-biomass yields compared to a high titer heterologous rhamnolipid production process from literature.

Effect of Temperature on Incubation Time for Spontaneous Morphology Change in Electrodeposited Copper Metallization

2005 ◽  
Vol 863 ◽  
Author(s):  
S. Ahmed ◽  
D.N. Buckley ◽  
S. Nakahara ◽  
Y. Kuo
Keyword(s):  
Incubation Period ◽  
Incubation Time ◽  
Annealing Time ◽  
Room Temperature ◽  
Diffusion Mechanism ◽  
Systematic Investigation ◽  
Effect Of Temperature ◽  
Copper Metallization ◽  
Morphology Change ◽  
A Value

AbstractA systematic investigation of the effect of annealing time and temperature on the incubation period for spontaneous morphology change (SMC) in electrodeposited copper metallization is reported. The incubation time is greatly reduced at higher temperatures. At each temperature, the remaining incubation time at room temperature was found to decrease approximately linearly with increasing annealing time. An Arhennius plot of the measured rates of decrease showed good linearity and yielded a value of 0.48 eV for the activation energy. This is consistent with a vacancy diffusion mechanism for the process occurring during the incubation period and supports our proposed mechanism for SMC.

scholarly journals Nectar secretion dynamics and honey production potentials of some major honey plants in Saudi Arabia

2017 ◽  
Vol 24 (1) ◽  
pp. 180-191 ◽  
Author(s):  
Nuru Adgaba ◽  
Ahmed Al-Ghamdi ◽  
Yilma Tadesse ◽  
Awraris Getachew ◽  
Awad M. Awad ◽  
...  
Keyword(s):  
Saudi Arabia ◽  
Nectar Secretion ◽  
Honey Production

scholarly journals Nectar secretion in the flowers of comfrey (Symphytum officinale L.) and nectar chemistry

2013 ◽  
Vol 56 (1-2) ◽  
pp. 27-36
Author(s):  
Małgorzata Stpiczyńska
Keyword(s):  
Amino Acids ◽  
Final Stage ◽  
Anther Dehiscence ◽  
Nectar Secretion ◽  
Nectar Volume ◽  
Symphytum Officinale ◽  
Modified Stomata ◽  
Pollen Exposure ◽  
Nectar Chemistry

Nectar secretion and nectar chemistry in the flowers of comfrey (<i>Symphytum officinale</i> L.) were examined in the four stages of anthesis: large buds, before pollen exposure: II - freshy opened flowers with the beginning of anther dehiscence: III- completely opened flowers in the maximum of pollen exposure: lV- flowers at the final stage of anthesis, without pollen in the anthers. Individual flower stays fresh 2,5-3 days, on average. Disc-shaped nectaries of S.officinale are located at the base of the four-lobbed ovary. Nectar is released through the modified stomata. Start of nectar secretion was noted at the bud stage. Nectar volume, mass of nectar and sugars differed in the examined stages of anthesis and the biggest values were noted at the final stages. Dominant sugar in nectar was sucrose with smaller amounts of fructose and glucose. The presence of amino acids was also recorded.

scholarly journals Analisis Efektivitas Mesin Batching Plant 1 dan Mesin Batching Plant 2 dengan Overall Equipment Effectiveness Pada PT. X

2015 ◽  
Vol 14 (2) ◽  
Author(s):  
Nia Budi Puspitasari ◽  
Eldinda Sazida Permatasari
Keyword(s):  
Production Capacity ◽  
Enterprise Systems ◽  
Total Productive Maintenance ◽  
A Value ◽  
Performance Factor ◽  
Make To Order ◽  
Two Machines ◽  
Recommended Action

<span><em>Overall Equipment Effectiveness (OEE) is one of Total Productive Maintenance (TPM) application </em><span><em>program, which aims to determine the effectiveness of a machine. PT. X has 3 machine batching plant </em><span><em>where machine 1 and 2 used effectively, from the data historically known that the machines batching </em><span><em>plant 1 having a value greater namely 1030 minutes compared to the engine batching plant 2 that have </em><span><em>value 240 minutes. This research measures the OEE value of two machines Bactching Plant and then </em><span><em>compares the results. The value obtained is 82.71% for machine 1 and 84.83% for machine 2. This </em><span><em>research suggests that the performance factor is the biggest problem in the machine OEE values, because </em><span><em>the enterprise systems is make to order, the recommended action is to maximize the production capacity </em><span><em>of each machine by considering a more accurate production targets in each period.</em></span></span></span></span></span></span></span></span><br /></span>

scholarly journals Identification and Evaluation of Factors Affecting Nectar Volume and Concentrations of Croton Macrostachyus Hochst.ex Delile

2021 ◽  
Author(s):  
Kasim Roba Jilo ◽  
Getachew Sime
Keyword(s):  
Relative Humidity ◽  
Sucrose Concentration ◽  
Abiotic Factors ◽  
Time Of Day ◽  
Factors Affecting ◽  
Nectar Volume ◽  
Biotic And Abiotic Factors ◽  
Honey Production ◽  
Nectar Concentration ◽  
Croton Macrostachyus

Abstract Background: Secretion of nectar is highly influenced by many factors and the objective of the study was also to evaluate factors affecting concentrations of nectar of Croton macrostachyus Hochst.ex Delile. Age of plants highly affect nectar concentration and volume. Honey quality and its medicinal values depends on plants species variety and their sucrose concentration quality and quantity which is governed by many biotic and abiotic factors as well micro climate of the area. Wholesale of nectar and concentration of tend to show more differences in time of day for species study undertaken.Results: As results publicized that nectar concentration and volume of youngest age was not more affected by temperature and relative humidity like that of medium and oldest ages. Temperature and age have significant effect on volume (p = 0.0001) and their interactions is also significant (p = 0.01145). Temperature has significant effects on nectar concentration (p = 0.000). Interaction of relative humidity, time, and layers has significant effects on nectar concentration (p = 0.0024012). The oldest plants had the highest concentration of 10.1 w/w mornings and afternoon 36.5 w/w at 4:00 PM for whereas medium plants had nectar concentration of 5.7 w/w morning and afternoon 16.7 w/w and the smaller or younger plants had nectar concentration of 2.7 w/w mornings and afternoon 9.1 w/w and this shows age significantly affect nectar concentration and volume.Conclusions:Concentration and volume were affected by many biotic and abiotic factors. I conclude imminent fever intensification could harm nectar production since for croton also no nectar could be collected at 30 C⁰ and no nectar recreation was observed after this peak temperature this indicates environmental change can increase the temperature which will have negative influences on honey production in the future unless we combat against climate change which will affect honey production and productivity for the country and we will lose honey and its medicinal values also.

Nectar Secretion Dynamics and Honey Production Potential of Croton macrostachyus L., Euphorbiaceae

Bee World ◽  
2020 ◽  
Vol 97 (4) ◽  
pp. 123-127
Author(s):  
Tura Bareke ◽  
Tolera Kumsa ◽  
Kasim Roba ◽  
Admassu Addi
Keyword(s):  
Nectar Secretion ◽  
Production Potential ◽  
Honey Production ◽  
Croton Macrostachyus

Rewards 2: The Biology of Nectar

2011 ◽  
Author(s):  
Pat Willmer
Keyword(s):  
Chemical Composition ◽  
Nectar Secretion ◽  
Water Reward ◽  
Floral Nectar ◽  
Nectar Production ◽  
Nectar Volume ◽  
Floral Reward ◽  
Nectar Concentration

This chapter examines the biology of nectar, the main secondary floral reward in an evolutionary sense. As a commodity, nectar is easy for plants to produce and easy for animals to handle; its sugars are simple to metabolize and thus to use as a readily available fuel for an animal’s activities. Nectar is a crucial factor in determining the interactions of flowers and their visitors. The chapter first provides an overview of how floral nectar is produced in a nectary before discussing nectar secretion, the chemical composition of nectar, and nectar volume. It then considers nectar concentration and viscosity, nectar as a sugar and energy reward, and nectar as a water reward. It also explores daily, seasonal, and phylogenetic patterns of nectar production, how flowers control their nectar and their pollinators, and problems in measuring and quantifying nectar. The chapter concludes with an analysis of the costs of nectar gathering.

Energy losses due to routine and feeding metabolism in young-of-the-year juvenile Atlantic cod (Gadus morhua)

2003 ◽  
Vol 60 (8) ◽  
pp. 929-937 ◽  
Author(s):  
Myron A Peck ◽  
Lawrence J Buckley ◽  
David A Bengtson
Keyword(s):  
Body Size ◽  
Gadus Morhua ◽  
Atlantic Cod ◽  
Effect Of Temperature ◽  
Energy Losses ◽  
The North ◽  
A Value ◽  
Different Temperatures ◽  
Body Sizes ◽  
Environmental Temperatures

We examined the effects of body size (3–13 cm total length) and temperature (4.5, 8.0, 12.0, and 15.5 °C) on routine (RR) and feeding (RSDA) energy losses by laboratory-reared, young-of-year juvenile Atlantic cod (Gadus morhua). The magnitude of the effect of temperature on RR, expressed via the Q10, was nonlinear. Q10 values were greatest at temperatures between 4.5 and 8.0 °C and were lowest between 8.0 and 15.5 °C, with larger fish tending to exhibit the greatest change in RR irrespective of the temperature combination. Energy losses resulting from RSDA were ~4% of consumed energy, a value less than half that estimated for larger, year-1+ juvenile cod fed similar-sized rations. Data from this and other studies were combined to generate an equation estimating routine energy loss at different temperatures and body sizes for cod. The equation describes RR over the eight orders of magnitude difference in body size from young larvae to adults within a range of environmental temperatures experienced by this species on Georges Bank and other areas in the North Atlantic.

scholarly journals Evaluation of the combined effect of temperature and salinity on the filtration, clearance rate and assimilation efficiency of the mangrove oyster Crassostrea corteziensis (Hertlein, 1951)

2012 ◽  
Vol 64 (2) ◽  
pp. 479-488 ◽  
Author(s):  
L.F. Enríquez-Ocaña ◽  
M. Nieves-Soto ◽  
P. Piña-Valdez ◽  
L.R. Martinez-Cordova ◽  
María Medina-Jasso
Keyword(s):  
Clearance Rate ◽  
Assimilation Efficiency ◽  
Combined Effect ◽  
Effect Of Temperature ◽  
Experimental Trial ◽  
A Value ◽  
Crassostrea Corteziensis

An experimental trial was conducted to evaluate the effect of the combination of four temperatures (23?, 26?, 29? and 32?C) and four salinities (25, 30, 35 and 40 PSU), on clearance (FR) and filtration (CR) rates, as well as on the assimilation efficiency (AE) of the mangrove oyster Crassostrea corteziensis. The interaction temperature-salinity had a significant effect on the feeding physiology of the oyster; optimum results were observed in the combination of 32?C and 35 PSU with a FR of 38.08 L?h-1?g-1, and a CR of 1.61 mg?h-1?g-1. The AE was higher in the combination of 29?C and 35 PSUs with a value of 65.1%. Results suggest that C. corteziensis maintains its feeding physiology in the gradient of temperature and salinity evaluated, which characterizes the bivalve as an eurythermal and euryhaline organism, with a better performance at moderate temperatures (29-32?C) and salinities (~35 PSU).

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