Using research and education to implement practical bed bug control programs in multifamily housing          下载免费PDF全文

Gary W Bennett  Ameya D Gondhalekar  Changlu Wang  Grzegorz Buczkowski  Timothy J Gibb 《Pest management science》2016,72(1):8-14

Multifamily housing facilities serving low‐income populations have been at the forefront of bed bug outbreaks. Research conducted in the past 8 years has consistently proven that integrated pest management (IPM) is the best approach for successful suppression of bed bug infestations. Bed bug IPM in multifamily settings is especially dependent upon a collaborative community or building‐wide effort involving residents, building staff and pest control technicians. Other components of a bed bug IPM program include regular monitoring to detect early‐stage bed bug infestations and combined use of non‐chemical and chemical interventions. Lastly, to reduce reinfestation rates and costs associated with bed bug control, it is critical to continue periodic monitoring and implement preventive control measures even after successful elimination of bed bugs has been achieved. © 2015 Society of Chemical Industry  相似文献   

Single-stage Bilateral Tibial Tuberosity Advancement With Cranial Fixation in an English Bulldog – A Case Report     

Zbigniew Adamiak  Andrzej Sobolewski  Grzegorz Walus  Yauheni Zhalniarovich  Joanna Glodek 《Topics in companion animal medicine》2018,33(3):63-64

This article presents a report of single-stage bilateral tibial tuberosity advancement for the treatment of cranial cruciate ligament rupture in an English bulldog. The reconstruction was performed by a new surgical technique involving tibial tuberosity advancement and fixation with two cranially placed lag screws. The patient was able to ambulate normally at a walk without lameness four days postoperatively. Except for bruising of the surgical site, no complications were observed during a six-month follow-up period.  相似文献   

Effect of thermomechanical densification on surface roughness of wood veneers     

Pavlo Bekhta  Stanisław Proszyk  Tomasz Krystofiak  Miroslava Mamonova  Grzegorz Pinkowski  Barbara Lis 《Wood material science & engineering》2014,9(4):233-245

The effect of short-term thermomechanical densification of veneer on the surface roughness and surface anatomical changes in four wood species – alder (Alnus glutinosa Gaertn.), beech (Fagus sylvatica L.), birch (Betula verrucosa Ehrh.), and pine (Pinus sylvestris L.) – was studied. Veneer sheets were densified at a temperature of 100, 150, or 200°C and at a pressure of 4, 8, or 12 MPa for 4 minutes. Seven roughness parameters such as R_a, R_z, R_q, R_p, R_v, R_sk, and R_ku were determined. Profile surface was recorded using a modified Carl Zeiss ME-10 profile gauging profilometer. Surface anatomical changes of veneer were examined using scanning electron microscopy. The results showed that densification temperature and pressure affect surface roughness of veneer. The surface became smoother, and roughness values decreased significantly (except for R_ku which increased slightly) with increasing temperature and pressure of densification. The effect of temperature on surface roughness changes is more pronounced compared with that of densification pressure. The lowest values of surface roughness were recorded for pine veneer samples followed by alder, birch, and beech samples. These results can be used to provide initial data for adhesive application processes in woodworking industry.  相似文献   

Influence of Humic Acid on Water Adsorption Characteristics of Kaolin and Quartz     

Zofia Sokolowska  Mieczyslaw Hajnos  Grzegorz Jozefaciuk  Christian Hoffmann  Manfred Renger 《植物养料与土壤学杂志》1997,160(2):327-331

Water vapor adsorption isotherms were measured for samples of kaolin and quartz amended with different amounts of humic acid extracted from a Cambic Arenosol under forest. Applying the approximation of the adsorption isotherms with the BET equation the monolayer capacities (surface areas) for the studied systems were calculated. For kaolin systems the surface area decreased sharply at low humic acid additions and this slowly increased with the further rise of the humic acid content, whereas for the quartz the increase of surface area was only noted for high humic acid contents. Using an exponential isotherm equation with a local BET model, the adsorption energy distribution functions were calculated for kaolin systems. The shape of the adsorption energy distributions showed that the increase in humic acid content changed the character of the surface from more hydrophilic to more hydrophobic. For intermediate humic acid contents, the energy distribution function had two maxima – more polar and less polar. At high humic acid contents the energy distribution function tended to the estimated value for pure humic acid, indicating high surface coverage with organic material. As measured by the mercury intrusion porosimetry, for the kaolin samples the amount of the largest pores decreases and the amount of the smallest pores increases with the accumulation of humic acid. For the quartz systems only very high doses of humic acid are reflected in changes of pore size distribution.  相似文献   

Pore‐system characteristics of pavement seam materials of urban sites     

Thomas Nehls  Grzegorz Jozefaciuk  Zofia Soko&#x;owska  Mieczyslaw Hajnos  Gerd Wessolek 《植物养料与土壤学杂志》2006,169(1):16-24

The original light‐brown sandy seam filling of pavements in urban areas turns dark and changes its properties by the time due to various inputs of urban dust. Deposited C_org inputs do mostly not have natural characteristics but are man‐made, e.g., diesel dust. Thus, properties of the seam material are not predictable from experiences with forest or agricultural soils. Semiperviously sealed urban areas are sites of contaminant deposition as well as groundwater recharge. For an assessment of the resulting groundwater‐contamination risk in these areas, the properties of the seam material, which influences transport processes, must be known. The aim of this study was to investigate the pore‐system build‐up, which includes size distribution and fractal character in the seam material of urban sites. The investigated samples were taken from pavements adjacent to roads in Berlin and Warsaw. The micropore parameters (nanometer range) were characterized using water‐vapor desorption isotherms, mesopore parameters (micrometer range) were estimated from mercury‐intrusion porosimetry and macropore parameters (millimeter range) from water‐retention curves. Particle density, dry bulk density, and particle‐size distribution were measured using standard methods. Volumes of micro‐ and mesopores as well as particle densities and dry bulk densities correlated with C_tot contents. However, no such relation was found for macropore volumes. Compared to the original sandy seam filling, the altered seam material shows significantly higher C_org contents and higher amounts of micro‐ and mesopores. Therefore, the available water capacity increases by 0.05–0.11 m³ m^–3, as compared to the original sandy seam filling. Compared to natural sandy soils having similar C_org contents, the seam material shows similar macropore volumes, but the volume of mesopores and micropores is a few times smaller. That is mainly because of the particulate character of the organic matter.  相似文献   

Water storage,surface, and structural properties of sandy forest humus horizons     

Mieczyslaw Hajnos  Grzegorz Jozefaciuk  Zofia Soko&#x;owska  Andreas Greiffenhagen  Gerd Wessolek 《植物养料与土壤学杂志》2003,166(5):625-634

In this paper, we tried to find interrelations between water retention properties, surface characteristics, and structural features of sandy soils rich in organic matter. Raw humic, epihumic, and endohumic horizons of four acidic sandy forest soils were selected for this study. Specific areas and water adsorption energies were estimated from water vapor adsorption isotherms, micropore (nanometer range) parameters from desorption isotherms, mesopore (micrometer range) parameters from mercury intrusion porosimetry, and macropore (millimeter range) parameters from water retention curves measured using combined suction plate and pressure chamber methods. In the studied soils, pore volumes in all pore ranges were proportional to soil organic matter content. Thin column wicking technique was used to determine migration velocity vs. time dependence in the samples beds for a range of liquids of various surface tensions. From these dependencies the surface free energy and its components were estimated that were used for calculation of water contact angles and forces of interparticle interaction via a water meniscus. The dominant interactions in the studied soils were dispersive Lifshitz‐Van der Waals forces. In the two upper horizons polar acid‐base interactions were absent, however in the deepest horizons, high input of polar interactions occurred, due practically to electron‐donor component of the surface free energy. The electron‐acceptor contribution was low. The wettability of the soils was low in upper horizons as indicated by high water contact angles.  相似文献   

Leiomodin is an actin filament nucleator in muscle cells     

Chereau D  Boczkowska M  Skwarek-Maruszewska A  Fujiwara I  Hayes DB  Rebowski G  Lappalainen P  Pollard TD  Dominguez R 《Science (New York, N.Y.)》2008,320(5873):239-243

Initiation of actin polymerization in cells requires nucleation factors. Here we describe an actin-binding protein, leiomodin, that acted as a strong filament nucleator in muscle cells. Leiomodin shared two actin-binding sites with the filament pointed end-capping protein tropomodulin: a flexible N-terminal region and a leucine-rich repeat domain. Leiomodin also contained a C-terminal extension of 150 residues. The smallest fragment with strong nucleation activity included the leucine-rich repeat and C-terminal extension. The N-terminal region enhanced the nucleation activity threefold and recruited tropomyosin, which weakly stimulated nucleation and mediated localization of leiomodin to the middle of muscle sarcomeres. Knocking down leiomodin severely compromised sarcomere assembly in cultured muscle cells, which suggests a role for leiomodin in the nucleation of tropomyosin-decorated filaments in muscles.  相似文献   

Influence of temperature and Artemia enriched with ω‐3 PUFAs on the early ontogenesis of Atlantic sturgeon,Acipenser oxyrinchus Mitchill, 1815          下载免费PDF全文

Ryszard Kolman  Oleksii Khudyi  Olga Kushniryk  Lidiia Khuda  Maja Prusinska  Grzegorz Wiszniewski 《Aquaculture Research》2018,49(5):1740-1751

Successful breeding of fish species in aquaculture depends on several factors, among which the temperature and feed are the most significant ones. This study was designed to evaluate the effect of temperature in the range of 14–18°C on the rate of embryogenesis and duration of larva period and to estimate the efficiency of Artemia nauplii enriched with PUFAs in growing sturgeon larvae. The temperature of 16°C is the most suitable for both egg incubation and Atlantic sturgeon prelarvae maintenance under aquaculture conditions. Even minor temperature fluctuations of 1 degree up or down leads to increased loss both of eggs and prelarvae. Increased temperature shortens the incubation period but has a lesser impact on the duration of prelarvae onset of external feeding. The technology of Artemia nauplii bioencapsulation with a PUFA‐containing supplement in A. oxyrinchus rearing increases sturgeon larvae weight by 1.5 times at a constant survival dynamic.  相似文献   

Environmentally friendly spray techniques for tree crops     

Grzegorz Doruchowski  Ryszard Holownicki 《Crop Protection》2000,19(8-10):617-622

Environmentally safe spray techniques have been developed to use minimal pesticide inputs and apply them only when and where needed with reduced losses to the environment. In this paper, two such systems are described: (1) shielded systems that recycle spray liquid that would otherwise be lost; (2) detection systems that recognise where there are gaps in crop rows for which spray is not needed. The results of studies by several research groups prove the relevance of these sprayers in reducing pesticide losses. Shielded spraying allows a reduction in chemical input in orchard protection by up to 85% by exploiting more uniform in-canopy spray distribution, recycling the spray that would otherwise be wasted. Sprayers with target detection systems apply spray only where target trees or bushes are present. This technique can reduce chemical consumption in orchards by 30% and decrease drift by 50%.  相似文献   

Polymer-Based Electrophoretic Deposition of Nonwovens for Medical Applications: The Effect of Carrier Structure,Solution, and Process Parameters     

Ewelina Pabjanczyk-Wlazlo  Nina Tarzynska  Anna Bednarowicz  Adam K. Puszkarz  Grzegorz Szparaga 《Marine drugs》2021,19(10)

Hyaluronate and alginate are non-toxic and biocompatible polymers, which can be used for surface modification and functionalization of many kinds of materials. Electrophoretic deposition (EPD) has several advantages, including its versatility, simplicity, and ability to coat substrates with complex shapes, and is used for the creation of antimicrobial or hydrophobic coatings on metallic biomaterials, among other applications. However, its utilization for applying biopolymer layers on textiles is very limited due to the more complex structure and spatial characteristics of fibrous materials. The aim of this research was to analyze the effects of selected EPD process parameters and the structural characteristics of fibrous carriers on the kinetics of the process and the microscopic characteristics of the deposited layers. The influence of solution characteristics, process parameters, and carrier structures obtained using two different techniques (melt blown and spun-bonded) were analyzed. The morphology and structure of the created deposits were analyzed using scanning electron microscopy and computed tomography, and molecular structure analysis was performed with Fourier Transform Infrared spectroscopy. The surface mass and thickness of fibrous poly (lactic acid)-based carriers were analyzed in accordance with the respective standards. This study serves as a basis for discussion and further development of this method with regard to fibrous materials for medical applications.  相似文献