scholarly journals Differences in the Development of Internal Reproductive Organs, Feeding Amount and Nutrient Storage between Pre-Diapause and Pre-Reproductive Harmonia axyridis Adults

Insects ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 243 ◽  
Author(s):  
Qiao Gao ◽  
Bing-Xin Wei ◽  
Wen Liu ◽  
Jia-Lu Wang ◽  
Xing-Miao Zhou ◽  
...  
Keyword(s):  
Harmonia Axyridis ◽  
Biocontrol Agent ◽  
Reproductive Organs ◽  
Developmental Trajectory ◽  
Nutrient Storage ◽  
Long Day ◽  
Morphological Differences ◽  
Native Place ◽  
And Storage

Diapause control is one of the successful methods for long-term cold storage of biological control organisms without decreasing their fitness. Sufficient preparation before diapause is essential for successful diapause initiation and maintenance. Harmonia axyridis, an important biocontrol agent in its native place, can enter reproductive diapause for overwintering. However, the key preparatory events before diapause in H. axyridis, such as specific developmental trajectory, timing, and physiological changes, remain unclear. We compared differences in the development of internal reproductive organs, feeding amount and nutrient storage between pre-diapause and pre-reproductive adult H. axyridis which had been reared at 20 °C under a short-day (10L:14D) and long-day (14L:10D) condition, respectively. The results showed that there were obvious morphological differences in internal reproductive organs of diapause and reproductive H. axyridis. The development of internal reproductive organs was suppressed at early adult stage in pre-diapause beetles compared to pre-reproductive beetles. Feeding amount in both pre-diapause and pre-reproductive beetles increased for more than ten days after eclosion. The feeding amount of pre-diapause beetles sharply decreased from the 15th day after eclosion in females and the 14th day after eclosion in males, which implied the initiation of diapause. During the pre-diapause stage, carbohydrates and lipids were mainly accumulated by females, whereas males mainly accumulated carbohydrates. Our results not only provide basic information about the diapause process of pre-diapause stage, but also give tips to better utilization of diapause strategy during mass production and storage of H. axyridis.

MODERN PROBLEMATICS AND ANALYSIS OF EFFICIENCY OF APPLICATION OF DIFFERENT APPROACHES TO DESTRUCTION OF INFORMATION ON MAGNETIC MEDIA

2019 ◽  
Vol 2 (12) ◽  
pp. 154-164
Author(s):  
O. Semenenko ◽  
O. Vodchyts ◽  
V. Koverga ◽  
R. Lukash ◽  
O. Lutsenko
Keyword(s):  
Armed Forces ◽  
Information Storage ◽  
Storage Device ◽  
Magnetic Media ◽  
Long Term Storage ◽  
Physical Impact ◽  
And Storage ◽  
Term Storage

The introduction and active use of information transmission and storage systems in the Ministry of Defense (MoD) of Ukraine form the need to develop ways of guaranteed removal of data from media after their use or long-term storage. Such a task is an essential component of the functioning of any information security system. The article analyzes the problems of guaranteed destruction of information on magnetic media. An overview of approaches to the guaranteed destruction of information on magnetic media of different types is presented, and partial estimates of the effectiveness of their application are given by some generally accepted indicators of performance evaluation. The article also describes the classification of methods of destruction of information depending on the influence on its medium. The results of the analysis revealed the main problems of application of software methods and methods of demagnetization of the information carrier. The issue of guaranteed destruction of information from modern SSD devices, which are actively used in the formation of new systems of information accumulation and processing, became particularly relevant in the article. In today's conditions of development of the Armed Forces of Ukraine, methods of mechanical and thermal destruction are more commonly used today. In the medium term, the vector of the use of information elimination methods will change towards the methods of physical impact by the pulsed magnetic field and the software methods that allow to store the information storage device, but this today requires specialists to develop new ways of protecting information in order to avoid its leakage.

scholarly journals Transgenerational Effects of a Neonicotinoid and a Novel Sulfoximine Insecticide on the Harlequin Ladybird

Insects ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 681
Author(s):  
Changchun Dai ◽  
Michele Ricupero ◽  
Zequn Wang ◽  
Nicolas Desneux ◽  
Antonio Biondi ◽  
...  
Keyword(s):  
Nicotinic Acetylcholine Receptors ◽  
Harmonia Axyridis ◽  
Biocontrol Agent ◽  
Insect Pests ◽  
Negative Influence ◽  
Management Approach ◽  
Generalist Predator ◽  
Cotton Aphid ◽  
Transgenerational Effects ◽  
Harlequin Ladybird

The harlequin ladybird, Harmonia axyridis Pallas (Coleoptera: Coccinellidae), is a generalist predator and an effective biocontrol agent of various insect pests that has been exploited for the control of aphid pests in the greenhouse and field. However, insecticides are widely used to control aphid pests worldwide and the potential non-target effects of sulfoxaflor and imidacloprid for controlling aphid pests towards this biocontrol agent are little known. Although both sulfoxaflor and imidacloprid act on nicotinic acetylcholine receptors of insects, sulfoxaflor has a novel chemical structure compared with neonicotinoids. We assessed the lethal, sublethal and transgenerational effects of sulfoxaflor and imidacloprid on H. axyridis simultaneously exposed via ingestion of contaminated prey and via residual contact on the host plant at LC20 and LC50 doses estimated for the cotton aphid. Imidacloprid significantly reduced the survival of H. axyridis adults compared to sulfoxaflor at the same lethal concentration against cotton aphid. Both concentrations of imidacloprid and sulfoxaflor reduced the proportion of ovipositing females, and both concentrations of imidacloprid and sulfoxaflor, except LC20 dose of sulfoxaflor, reduced the fecundity and fertility of the parental generation. In the progeny of imidacloprid- and sulfoxaflor-exposed parents, both tested LC50 concentrations significantly decreased the juvenile survival rate, and both concentrations of imidacloprid and sulfoxaflor, except LC20 dose of sulfoxaflor, prolonged the development time. Our findings provide evidence of the negative influence of imidacloprid and sulfoxaflor at low lethal concentrations on the harlequin ladybird and on the progeny of exposed individuals, i.e., transgenerational effects. Hence, these findings stress the importance of optimizing the applications of imidacloprid and sulfoxaflor for the control of aphid pests, aiming at preserving the biocontrol services provided by H. axyridis throughout the integrated pest management approach.

scholarly journals Quality tracing in meat supply chains

2014 ◽  
Vol 372 (2017) ◽  
pp. 20130308 ◽  
Author(s):  
Miriam Mack ◽  
Patrick Dittmer ◽  
Marius Veigt ◽  
Mehmet Kus ◽  
Ulfert Nehmiz ◽  
...  
Keyword(s):  
Supply Chains ◽  
Process Analysis ◽  
Decision Support Tool ◽  
Temperature Monitoring ◽  
Support Tool ◽  
Logistics Network ◽  
Primary Model ◽  
Sensory Parameters ◽  
And Storage

The aim of this study was the development of a quality tracing model for vacuum-packed lamb that is applicable in different meat supply chains. Based on the development of relevant sensory parameters, the predictive model was developed by combining a linear primary model and the Arrhenius model as the secondary model. Then a process analysis was conducted to define general requirements for the implementation of the temperature-based model into a meat supply chain. The required hardware and software for continuous temperature monitoring were developed in order to use the model under practical conditions. Further on a decision support tool was elaborated in order to use the model as an effective tool in combination with the temperature monitoring equipment for the improvement of quality and storage management within the meat logistics network. Over the long term, this overall procedure will support the reduction of food waste and will improve the resources efficiency of food production.

The IEA Weyburn CO2 monitoring and storage project — Modeling of the long-term migration of CO2 from Weyburn

2005 ◽  
pp. 721-729 ◽  
Author(s):  
W ZHOU ◽  
M STENHOUSE ◽  
R ARTHUR ◽  
S WHITTAKER ◽  
D LAW ◽  
...  
Keyword(s):  
Co2 Monitoring ◽  
And Storage

scholarly journals From hierarchies to markets and partially back again in electricity: responding to decarbonization and security of supply goals

2021 ◽  
pp. 1-17
Author(s):  
Paul L. Joskow
Keyword(s):  
Market Integration ◽  
Investment Incentives ◽  
Wholesale Market ◽  
Security Of Supply ◽  
Short Term ◽  
Institutional Adaptation ◽  
The World ◽  
New Challenges ◽  
And Storage

Abstract Electric power sectors around the world have changed dramatically in the last 25 years as a result of sector liberalization policies. Many electricity sectors are now pursuing deep decarbonization goals which will entail replacing dispatchable fossil generation primarily with intermittent renewable generation (wind and solar) over the next 20–30 years. This transition creates new challenges for both short-term wholesale market design and investment incentives consistent with achieving both decarbonization commitments and security of supply criteria. Thinking broadly about the options for institutional change from a Williamsonian perspective – thinking like Williamson – provides a useful framework for examining institutional adaptation. Hybrid markets that combine ‘competition for the market’ that relies on competitive procurement for long-term purchased power agreements with wind, solar, and storage developers, ideally in a technology neutral fashion, and ‘competition in the market’ that relies on short-term markets designed to produce efficient and reliable operations of intermittent generation and storage, is identified as a promising direction for institutional adaptation. Many auction, contract, and market integration issues remain to be resolved.

Monitoring Volatile and Nonvolatile Amines in Dried and Salted Roes of Tuna (Thunnus thynnus L.) during Manufacture and Storage

2003 ◽  
Vol 66 (2) ◽  
pp. 335-340 ◽  
Author(s):  
M. J. PERIAGO ◽  
J. RODRIGO ◽  
G. ROS ◽  
J. J. RODRÍGUEZ-JÉREZ ◽  
M. HERNÁNDEZ-HERRERO
Keyword(s):  
Biogenic Amine ◽  
Mediterranean Area ◽  
Reproductive Organs ◽  
Decarboxylase Activity ◽  
Drying Process ◽  
Consumer Safety ◽  
Histamine Formation ◽  
Processing And Storage ◽  
And Storage ◽  
Safety Limit

Dried and salted roe, obtained from the reproductive organs of female tuna (Thunnus tynnus L.), is a typical fish-based food in the Mediterranean area of Spain. In the present study, we monitored the formation of volatile amines (trimethyamine nitrogen [TMA-N] and total basic volatile nitrogen [TBVN]) and nonvolatile amines (biogenic amines) in dried and salted tuna roe after processing and storage for 8 weeks at 4, 20, and 30°C. The salting and drying process significantly increased the TBVN, cadaverine, tyramine, phenylethylamine, and tryptamine contents, and bacteria with histamine decarboxylase activity were detected both in raw and in dried and salted tuna roes. During storage of tuna roe, TMA-N and TBVN levels increased significantly after the fourth week of storage at 30°C, whereas biogenic amine contents remained more or less constant. However, samples stored at 30°C showed histamine formation after the first week of storage, with a concentration of <50 ppm. The volatile and nonvolatile amine concentrations in tuna roe were below the consumer safety limit, with the exception of the total biogenic amine level in roe stored at 30°C, which exceeded the European Community's recommended limit (300 ppm). These results indicate that in properly stored tuna roe, histamine formation will not represent a serious health risk to consumers unless the tuna roe has previously been mishandled.

Guidelines for Repair Welding of Pressure Equipment in Refinery and Chemical Plants: Part 3—Repair Welding for Specific Materials - Carbon Steel, High Tensile Steel and Cr-Mo Steel

2011 ◽  
Author(s):  
Rinzo Kayano ◽  
Masamitsu Abe ◽  
Yukio Hirai
Keyword(s):  
Carbon Steel ◽  
Pressure Vessels ◽  
Chemical Plants ◽  
Safe Operation ◽  
Gas Industry ◽  
Repair Welding ◽  
Weld Residual Stress ◽  
Natural Gas Industry ◽  
And Storage

It has been recognized that repair welding plays an important role in the long term, safe operation of pressure equipment. In 2009, The Japan Welding Society (JWES) published guidelines for repair welding of pressure equipment [1], to meet the great need for the safe operation and proper maintenance of aging plants. Pressure equipments made from carbon steel, high tensile steel and Cr-Mo steels are utilized for high pressure services. The subject equipments are pressure vessels, heat exchangers, piping, and storage tanks for petroleum, petrochemical and liquefied natural gas industry. This paper summarizes category and property of these steels and repair welding method including special attention. Especially, weld cold cracking for these steels could be prevented by controlling the repair welding and post-weld heat treatment process to reduce the hydrogen content, hardness and weld residual stress.

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