bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effects of Contamination of Biobased Hydraulic Fluids with Mineral Oil
Authors: Theissen Heinrich W. 
Published: January 2009

Abstract
There are many occasions for biobased hydraulic fluids to be contaminated with mineral oil, caused either by incomplete flushing during conversion from mineral oil to bio-oil, or by carelessness during maintenance and refilling. With high contamination levels, problems like foaming, poor air release, or filter clogging have been reported. In experiments at IFAS (Institute for Fluid Power Drives and Controls) of RWTH Aachen University, relevant properties of biobased oils contaminated with different levels of various mineral oils have been analyzed. It was found, that the degree of deterioration correlates not to the amount of mineral oil added, but to the amount of metals introduced through the mineral oil’s additives. Deterioration effects may take several hours or days to develop. The effects are specific for different bio-oil products. As a practical consequence, some changes in quality control, product documentation, and standardization are recommended.
Decreased Mortality of Lake Michigan Chinook Salmon after Bacterial Kidney Disease Challenge: Evidence for Pathogen Driven Selection?
Authors: Purcell Maureen K. , Murray Anthony L. , Elz Anna , Park Linda K. , Marcquenski Susan V. , Winton James R. , Alcorn Stewart W. , Pascho Ronald J. , Elliott Diane G. 
Published: January 2009

Abstract
In the late 1960s, Chinook salmon Oncorhynchus tshawytscha from the Green River, Washington, were successfully introduced into Lake Michigan. During spring from1988 to 1992, large fish die offs affecting Chinook salmon occurred in the lake. Multiple ecological factors probably contributed to the severity of the fish kills, but the only disease agent found regularly was Renibacterium salmoninarum, the causative agent of bacterial kidney disease. In this study, survival after challenge by R. salmoninarum was compared between two Chinook salmon stocks: a Lake Michigan stock from Wisconsin (WI) and the progenitor stock from the Green River. We found that the WI stock had significantly greater survival than the Green River stock. Next, the WI and Green River stocks were exposed to the marine pathogen Listonella anguillarum (formerly Vibrio anguillarum), one of the causative agents of vibriosis; survival after this challenge was significantly poorer for the WI stock than for the Green River stock. A close genetic relationship between the Green River and WI stocks was confirmed by analyzing 13 microsatellite loci. These results collectively suggest that disease susceptibility of Lake Michigan Chinook salmon has diverged from that of the source population, possibly in response to pathogen driven selection.
A Model of the Effects of Flow Fluctuations on Fall Chinook Salmon Spawning Habitat Availability in the Columbia River
Authors: Geist David R. , Murray Christopher J. , Hanrahan Timothy P. , Xie Yulong 
Published: January 2009

Abstract
The logistic regression models that we previously used to predict where fall Chinook salmon Oncorhynchus tshawytscha would spawn in the Hanford Reach of the Columbia River were based on so-called static variables (i.e., the riverbed surface substrate, riverbed slope, and time-averaged velocity and depth [representing the velocity and depth in each cell associated with the 50% exceedance flow]). Not all habitat predicted to be used for spawning contained redds, and one explanation for the overprediction is that the models did not incorporate streamflow fluctuation. Streamflow fluctuation occurs daily in the Hanford Reach owing to load-following operations (power generation to meet short-term electrical demand) at Priest Rapids Dam, a hydroelectric dam located at the upper end of the reach. Daily flow fluctuations could change the hydraulic characteristics to which fall Chinook salmon respond in selecting redd sites. The purpose of this study was to determine whether incorporating metrics of flow variability would improve modeling of spawning habitat availability. Flow variability was represented by so-called dynamic variables (i.e., the standard deviations of velocity and depth for each habitat cell over a 60-d time segment during the fall spawning period in 1994, 1995, and 2001). Both the static and dynamic models were correct at least 85% of the time in predicting habitat as spawning or nonspawning. However, incorporation of the dynamic variables into the logistic regression models reduced the amount of overpredicted habitat by 42% in 1994, 32% in 1995, and 25% in 2001. For example, the area predicted to be suitable but not used in 1994 decreased from 20.8 ha for the static model to 12.1 ha for the dynamic model for all sites combined; similar results were found for 1995 and 2001. This represents an improvement in our ability to accurately predict suitable fall Chinook salmon spawning habitat in the Hanford Reach of the Columbia River.
Ranking Predatory Threats by Nonnative Fishes in the Yampa River, Colorado, via Bioenergetics Modeling
Authors: Johnson Brett M. , Martinez Patrick J. , Hawkins John A. , Bestgen Kevin R. 
Published: January 2009

Abstract
Because of its relatively natural hydrograph, the Yampa River, Colorado, is considered the crown jewel of native fish habitat in the upper basin of the Colorado River and has supported a relatively intact native fish assemblage. Nonnative fishes are thought to pose the greatest threat to native fishes in this system. Removal programs for nonnative northern pike Esox lucius and channel catfish Ictalurus punctatus have highlighted managers' perception of the threat posed by each species. Recent expansion of nonnative smallmouth bass Micropterus dolomieu in the Yampa River attracted an avid angling clientele but also coincided with a precipitous decline in native fishes, necessitating a rigorous assessment of the relative impact of all three nonnative predators on the native fishes. We used abundance, growth, and diet estimates for each predator species to quantify consumptive demand using bioenergetics models. Despite a low abundance of small-bodied fishes and thus a low number of fish in the smallmouth bass diet, total fish consumption by smallmouth bass (mean = 15.2 kg·km−1·year−1; 95% confidence interval [CI] = 13.3–17.1 kg·km−1·year−1) was similar to that estimated for northern pike (mean = 13.7 kg·km−1·year−1, 95% CI = 11.4–16.0 kg·km−1·year−1) and was about 65 times higher than the estimate for channel catfish (mean = 0.22 kg·km−1·year−1; 95% CI = 0.05–0.40 kg·km−1·year−1). Diet data from the upper Colorado River, where small-bodied fish were plentiful, suggested that piscivory by smallmouth bass in the Yampa River could be 10 times the piscivory by northern pike and channel catfish, or about 168.5 kg·km−1·year−1 (95% CI = 147.0–189.9 kg·km−1·year−1), if prey fish were more available. This level of piscivory suggested that smallmouth bass presented the greatest predatory threat to native fishes of the Yampa River. As environmental conditions change, use of field monitoring together with bioenergetics modeling will be an effective framework to assist managers in adapting their nonnative fish control efforts to maximize the likelihood of native fish recovery.
Surface Area Estimates of Streams and Rivers Occupied by Nonnative Fish and Amphibians in the Western USA
Authors: Whittier Thomas R. , Peck David V. 
Published: January 2009

Abstract
Statistically robust, broad-scale measures of the portion of an aquatic resource (e.g., a stream and river network) occupied by nonnative fish and amphibian species should be useful to resource managers but with a few exceptions have not been available. We used data from the western stream and river survey of the U.S. Environmental Protection Agency's Environmental Monitoring and Assessment Program to estimate the surface area of flowing waters occupied by nonnative fish and amphibian species at three spatial scales. For the 12-state survey area, an estimated 75% of the surface area of the target stream network had one or more nonnative fish or amphibian species, compared with 52% of the stream length. At all spatial scales (except the state of Washington), the estimates of the proportion of surface area with nonnatives were larger than those for estimated stream length. The relative extent of occupancy for individual species often differed depending on how they were assessed. For example, when assessed by length of network occupied, brook trout Salvelinus fontinalis was the most widespread nonnative fish (17%) but dropped to ninth position when assessed by surface area occupied (7%), while common carp Cyprinus carpio went from fourth position (10% of stream length) to second position when assessed by surface area occupied (27%). Estimates of the surface areas of flowing waters occupied by nonnative species are useful and easily calculated additions to the ways in which probability-based surveys can assess the condition of the resource.
<i>Wedelia trilobata</i> (l.) A.S. Hitchc. (Asteraceae) - A new record for Bangladesh
Authors: Hossain ABM Enayet , Hassan Md Abul 
Published: January 2009

Not available. Key words: Wedelia trilobata (L.) A.S. Hitchc.; Asteraceae; new record; Bangladesh DOI: 10.3329/bjpt.v12i1.612 Bangladesh J. Plant Taxon. 12(1): 63-65, 2005 (June)
Additions to the genus <i>Stigeoclonium</i> (Chlorophyta) as new records for Bangladesh
Authors: Khan Mazibar Rahman , Islam AKM Nurul 
Published: January 2009

Three taxa belonging to the genus Stigeoclonium (Chaetophorales, Chlorophyta) are described here as new records for Bangladesh, namely, Stigeoclonium amoenum var. novizelandicum, S. protensum and S. tenue var. uniforme. Key words: New records, Stigeoclonium, Chlorophyta, Chaetophoraceae, Bangladesh DOI: 10.3329/bjpt.v12i2.598 Bangladesh J. Plant Taxon. 12(2): 1-9, 2005 (December)
Pleurocarpous mosses of Bangladesh : Symphyodontaceae and Amblystegiaceae
Authors: Khatun Hamida , Hadiuzzaman Syed 
Published: January 2009

A taxonomic account of six species of Pleurocarpous mosses of Bangladesh of the families Symphyodontaceae and Amblystegiaceae under the order Hookeriales and Hypnobryales respectively are given. Key words: Pleurocarpous moss, Hookeriales, Hypnobryales, Symphyodontaceae, Amblystegiaceae, Bangladesh DOI: 10.3329/bjpt.v13i1.591 Bangladesh J. Plant Taxon. 13(1): 29-40, 2006 (June)
Aquatic flora in two Indian ponds near Kolkata, West Bengal: Implications for conservation
Authors: Mukhopadhyay Gautam , Sengupta Sourav , Dewanji Anjana 
Published: January 2009

Occurrence, coverage and chemical constituents of aquatic flora were studied in two Indian ponds over a period of 39-month in order to gain an insight into their associations and infestation for implications in conservation and management. Species diversity was recorded in presence of two invasive species (Alternanthera philoxeroides (Martius) Griseb. and Lemna aequinoctialis Welwitsch). These species should be managed in view of their beneficial uses. Nymphaea pubescens Willd, a threatened species, was recorded. Positive association of Nymphoides hydrophylla (Loureiro) O. Kuntze with Alternanthera philoxeroides and Vallisneria spiralis L. showed that spatially separated habitats are useful for conservation. Azolla pinnata R. Brown, an useful species and Rotala rotundifolia (F. Hamilton ex Roxburgh) Koehne, an uncommon species, were able to produce high coverage in their brief occurrence - important for their conservation. Similar feature as observed in Cladophora glomerata (L.) Kütz and Hydrodictyon reticulatum (L.) Lagerh. is useful for management of these species due to their negative impacts. Key words: Aquatic flora, Species composition, Occurrence, Coverage, Nitrogen, Phosphorus, Management DOI: 10.3329/bjpt.v14i1.519 Bangladesh J. Plant Taxon. 14(1): 13-24, 2007 (June)
The genus <i>Pronephrium</i> C. Presl (Thelypteridaceae) from Bangladesh
Authors: Mirza Momtaz Mahal 
Published: January 2009

The paper deals with the genus Pronephrium C. Presl of the family Thelypteridaceae and includes five species, namely P. articulatum (Haulst. & Moore) Holtt., P. lakhimpurensis (Rosenst.) Holtt., P. nudatum (Roxb. ex Griff.) Holtt., P. parishii (Bedd.) Holtt., and P. triphyllum (Sw.) Holtt. from Bangladesh. Descriptions of the species with artificial key, illustrations, distribution and short notes with conservation measures are given here. Key words: Pronephrium, Thelypteridaceae, Pteridophyte, Bangladesh DOI: 10.3329/bjpt.v14i1.521 Bangladesh J. Plant Taxon. 14(1): 37-45, 2007 (June)
<i>Tacca plantaginea</i> (Hence) Drenth (Taccaceae) - A new angiospermic record for Bangladesh
Authors: Hassan MA , Uddin Mohammad Zashim 
Published: January 2009

Not available.Key words: Tacca plantaginea, New record, Bangladesh DOI: 10.3329/bjpt.v14i1.525 Bangladesh J. Plant Taxon. 14(1): 71-73, 2007 (June)
Characteristics of the proximal to distal regions of the petioles to identify 15 tree species of Papilionoideae-Fabaceae
Authors: Heneidak Samia , Shaheen Abdel Samai M 
Published: January 2009

Comparative studies on the structure of the vascular supply of stem-leaf transitional zone of the petioles were carried out in 15 papilionoid tree species. Anatomical characteristics and changes in the main vascular trace were recorded. The anatomical features of significance include outline; epidermal cell; pericyclic fiber patterns; main petiolar vasculature; presence, number and separation of ridge vascular bundles; presence of additional accessory ridge bundles; crystal types; secretory elements and multicellular trichomes. Erythrina variegata and Pterocarpus indicus show no change in the petiole trace structure throughout their petioles from proximal to distal, while the rest of the species have minor to major changes. Sophora secundiflora has the highest number of ridge vascular bundles (5-6), while these are absent in the two Dalbergia species, E. variegata, Derris robusta, Sophora davidii and S. japonica. Only Derris robusta and Sophora japonica show unusual petiole trace structure by having two additional accessory ridge bundles adaxial of the main trace enclosing with it by a complete ring of pericyclic fibers. The studied species of tribe Millettieae show the presence of secretory cavities lined by epithelial cells. The usefulness of these character states is shown for assessing, identifying and delimiting these examined species. Key words: Accessory ridge bundles, Crystals, Papilionoideae, Petiole anatomy, Petiole vasculature, Ridge bundles, Secretory cavities DOI: 10.3329/bjpt.v14i2.530 Bangladesh J. Plant Taxon. 14(2): 101-115, 2007 (December)
A taxonomic account on the phytoplankton of a pond receiving textile industrial effluents
Authors: Begum Z.N. Tahmida 
Published: January 2009

Phytoplankton from four stations of a large pond receiving effluents from two textile industries have been investigated. A total of 69 taxa were identified out of which 48 belonged to Chlorophyceae followed by 17 to Cyanophyceae. One species from each of Chrysophyceae, Xanthophyceae, Cryptophyceae and Dinophyceae were also recorded. Oscillatoria limnetica Lemm., Anabaena circinalis Rabenh. ex Born. et Flah., Nostoc commune Vaucher ex Born. et Flah. Ankistrodesmus falcatus var. mirabilis (West & West) Lemm. and Scendesmus spp. were found dominant in all the stations.Keywords: Industrial effluents, Phytoplankton, TaxonomyÂ DOI: 10.3329/bjpt.v15i2.1742Â Bangladesh J. Plant Taxon. 15(2): 129-139, 2008 (December)
The genus <i>Heliconia</i> L. of Bangladesh
Authors: Sultana Nahid , Hassan Md. Abul 
Published: January 2009

The heliconias, now widely grown in Bangladesh as ornamental plants, have been classified into eight species with four cultivars, and two hydrids. Dichotomous bracketed keys to the taxa, detailed taxonomic descriptions with colour photographs, time of flowering and distribution have been provided. English names and chromosome numbers have also been furnished wherever available.Â Keywords: Heliconia, Cultivated, Keys and descriptions, BangladeshÂ DOI: 10.3329/bjpt.v15i2.1752Â Bangladesh J. Plant Taxon. 15(2): 141-153, 2008 (December)
Physician scatter dose in interventional CT fluoroscopy
Authors: Knott Emily A. , Troville Jonathan L. , Reynoso Carlos Alberto , Rose Sean D. , Wagner Martin G. , Lee Fred T. , Radtke Jeffery L. , Anderson Daniel R. , Zlevor Annie , Lubner Meghan G. , Hinshaw J. Louis , Szczykutowicz Timothy P. 
Published: April 2024

AbstractPurposeTo quantify operator dose in interventional CT fluoroscopy (CTF) procedures and compare to catheterization laboratory and interventional radiology procedures.MethodsFifteen studies quantifying operator scatter dose for c‐arm fluoroscopy and CTF were reviewed from a literature survey. The dose provided in each study was normalized to skin entrance air kerma and air kerma rate including backscatter. The average air kerma rate and exposure duration were calculated and compared between c‐arm fluoroscopy and CTF. To enable operator scatter dose calculations in CTF procedures, a model was created which scaled the dose from a reference condition.ResultsOur literature survey indicated that for CTF relative to c‐arm fluoroscopy: (1) the mean air kerma rate is 3.5 times higher, while (2) the mean exposure duration is 31.6 times lower. On average, a physician would have to perform 9.1 times (i.e., 31.6/3.5) more CTF procedures relative to c‐arm fluoroscopy procedure to receive equal operator scatter doses. Our own experimental measurements provided scaling factors allowing physician scatter dose to be obtained at any rotation time, tube current, beam collimation, or beam energy.ConclusionOur results shed light onto a currently mis‐understood issue in radiology. Namely, that physicians receive more dose from CT relative to c‐arm fluoroscopy motivating them to retreat from the room during interventional exposures. Our literature review and experimental measurements indicate the opposite it true; interventional CT produces on average nine times less physician dose relative to c‐arm procedures. Our method allows for prospective/retrospective determination of an individual's dose.
Size‐Dependent Blue Emission from Europium‐Doped Strontium Fluoride Nanoscintillators for X‐Ray‐Activated Photodynamic Therapy
Authors: Policei Marques Natasha , Isikawa Mileni M. , Muradova Zeinaf , Morris Toby , Berbeco Ross , Guidelli Eder J. 
Published: April 2024

AbstractSuccessful implementation of X‐ray‐activated photodynamic therapy (X‐PDT) is challenging because most photosensitizers (PSs) absorb light in the blue region, but few nanoscintillators produce efficient blue scintillation. Here, efficient blue‐emitting SrF2:Eu scintillating nanoparticles (ScNPs) are developed. The optimized synthesis conditions result in cubic nanoparticles with ≈32 nm diameter and blue emission at 416 nm. Coating them with the meso‐tetra(n‐methyl‐4‐pyridyl) porphyrin (TMPyP) in a core–shell structure (SrF@TMPyP) results in maximum singlet oxygen (1O2) generation upon X‐ray irradiation for nanoparticles with 6TMPyP depositions (SrF@6TMPyP). The 1O2 generation is directly proportional to the dose, does not vary in the low‐energy X‐ray range (48–160 kVp), but is 21% higher when irradiated with low‐energy X‐rays than irradiations with higher energy gamma rays. In the clonogenic assay, cancer cells treated with SrF@6TMPyP and exposed to X‐rays present a significantly reduced survival fraction compared to the controls. The SrF2:Eu ScNPs and their conjugates stand out as tunable nanoplatforms for X‐PDT due to the efficient blue emission from the SrF2:Eu cores; the ability to adjust the scintillation emission in terms of color and intensity by controlling the nanoparticle size; the efficient 1O2 production when conjugated to a PS and the efficacy of killing cancer cells.
Molecularly Imprinted Macroporous Hydrogel Promotes Bone Regeneration via Osteogenic Induction and Osteoclastic Inhibition
Authors: Chen Jingxiao , Jing Yihan , Liu Yanhong , Luo Yongxi , He Yutong , Qiu Xiaozhong , Zhang Qingbin , Xu Huiyong 
Published: April 2024

AbstractMacroporous hydrogels offer physical supportive spaces and bio‐instructive environment for the seeded cells, where cell‐scaffold interactions directly influence cell fates and subsequently affect tissue regeneration post‐implantation. Effectively modifying bioactive motifs at the inner pore surface provides appropriate niches for cell‐scaffold interactions. A molecular imprinting method and sacrificial templates are introduced to prepare inner pore surface modification in the macroporous hydrogels. In detail, acrylated bisphosphonates (Ac‐BPs) chelating to templates (CaCO3 particles) are anchored on the inner pore surface of the methacrylated gelatin (GelMA)‐methacrylated hyaluronic acid (HAMA)‐poly (ethylene glycol) diacrylate (PEGDA) macroporous hydrogel (GHP) to form a functional hydrogel scaffold (GHP‐int‐BP). GHP‐int‐BP, but not GHP, effectively crafts artificial cell niches to substantially alter cell fates, including osteogenic induction and osteoclastic inhibition, and promote in situ bone regeneration. These findings highlight that molecular imprinting on the inner pore surface in the hydrogel efficiently creates orthogonally additive bio‐instructive scaffolds for bone regeneration.
Surface‐Functionalized Microgels as Artificial Antigen‐Presenting Cells to Regulate Expansion of T Cells
Authors: Lou Junzhe , Meyer Charlotte , Vitner Einat B. , Adu‐Berchie Kwasi , Dacus Mason T. , Bovone Giovanni , Chen Anqi , To Tania , Weitz David A. , Mooney David J. 
Published: April 2024

AbstractArtificial antigen‐presenting cells (aAPCs) are currently used to manufacture T cells for adoptive therapy in cancer treatment, but a readily tunable and modular system can enable both rapid T cell expansion and control over T cell phenotype. Here, it is shown that microgels with tailored surface biochemical properties can serve as aAPCs to mediate T cell activation and expansion. Surface functionalization of microgels is achieved via layer‐by‐layer coating using oppositely charged polymers, forming a thin but dense polymer layer on the surface. This facile and versatile approach is compatible with a variety of coating polymers and allows efficient and flexible surface‐specific conjugation of defined peptides or proteins. The authors demonstrate that tethering appropriate stimulatory ligands on the microgel surface efficiently activates T cells for polyclonal and antigen‐specific expansion. The expansion, phenotype, and functional outcome of primary mouse and human T cells can be regulated by modulating the concentration, ratio, and distribution of stimulatory ligands presented on microgel surfaces as well as the stiffness and viscoelasticity of the microgels.