Creek Road Research Articles

Assessment of the level of some heavy metals in commonly consumed local fish species displayed for sale in Port Harcourt, Nigeria

Background: The incessant crude oil spillage into the water bodies of the Niger delta region of Nigeria has raised fears that the fish caught in the water bodies would be heavily contaminated with heavy metals. This study tested five commonly consumed local fish species for their lead, cadmium, mercury, and arsenic content. Methods: Samples of dark tilapia (Sarothendon gallelacus), light tilapia (Oreochronis niloticus), two-fin catfish (Clarias gariepinus), Zeghe (Hydrocynus forskahlii) and three-fin catfish (Auchenoglanis occidentalis) bought from three fish markets (Creek Road, Mile One and Iwofe) were used for the study. The levels of the heavy metals in the fish samples were assessed in an accredited laboratory, while the human health implications of the contaminants were determined using the relevant international regulatory standards. Results: The fish samples contained detectable levels of the assessed metals. The mean concentration of cadmium in the fish samples was 0.29mg/kg; while the mean concentration of arsenic was of 1.85mg/kg. The average concentrations of lead and mercury in the fish samples were below the regulatory limits, whereas the mean concentration of cadmium was three times the WHO permissible limit of 0.1mg/kg. The concentrations of cadmium were highest in the light tilapia, and in the fish bought from the Mile One market, and lowest in the three-fin catfish, bought from the Creek Road market. Conclusion: The levels of the assessed heavy metals were significantly less than expectation. The levels of cadmium in the samples were however high enough to cause severe adverse health effects, hence the need for a more comprehensive public health response in managing crude oil spills.

Birding at Bulldog Creek Road

Birding at Bulldog Creek Road

Dust as a contributor to the road-effect zone: a case study from a minor forest road in Australia

The road-effect zone is a concept developed to describe the impact of influences such as noise, vibration, light and dust associated with roads and traffic on the surrounding area. Although many aspects associated with the road-effect zone have been investigated, the influence of dust remains poorly understood. Gap Creek Road, a minor road traversing forest near Brisbane, Australia, was upgraded in 2010 by sealing and realignment. The present study compares pre- and post-construction dust levels within the forest, and the diversity and abundance of ground-dwelling mammals near (2–5 m) and far (80–100 m) from the road. Prior to the upgrade, dust levels were very high with deposition rates equivalent to a major daily dust storm. The key influence of the upgrade was the almost complete elimination of this dust production; hence, we predicted that species richness and abundance of small mammals near the road would increase significantly after the upgrade. Pre-upgrade surveys confirmed that the forest supported a diverse and abundant community of ground-dwelling mammal species with eight species detected, including in highly dust-affected sites near the road. Following the upgrade, there was little change in the abundance of species, though some were significantly more abundant away from the road. These results suggest that, in certain environments, dust may have far less impact on ground-dwelling mammals than expected.

English

Study on arsenic pollution was conducted in Onitsha town in Anambra State, Nigeria to examine the pollution status of surface and subsurface water. Arsenic concentration in surface water within Onitsha metropolis ranged from 0.2001 mg/L (River Niger upstream) to 1.5883 mg/L (River Niger central drainage surface), while concentration in boreholes lies within the range of 0.0000 mg/L (22.2% of boreholes) and 1.2507 mg/L (creek road), respectively. Arsenic concentration in sampled water from river sources is above the WHO standard (0.01 mg/ L) while 87.8% of Arsenic concentration in boreholes adjacent and closest to these rivers and creek is also above the world Health Organization standard (WHO, 2011) of 0.01 mg/L. it is discovered that pollution of surface water is greater than that of the groundwater sources. Major sources of arsenic in Onitsha are refuse dumps, effluent from industries and sewage amongst other sources. Arsenic is known to be the most poisonous metal in existence on earth’s surface, its production should be carefully monitored and effluents treated before discharge into the environment. Key words: Arsenic, water, health.

Studies on the Bacteria Burden in Garri Openly Sold in Port Harcourt Markets

A total of 30 samples of exposed garri in Port Harcourt (mile 1 Market, Churchill Market, Creek Road Market and control samples) were examined for burden of bacteria. One gram (1gm) of each garri was soaked in 9ml of sterile water to make a 1:10 dilution (stock solution) and 1ml was transferred to a test tube and diluted serially in one tenth stepwise to 10- 4 . From 10- 4 tube, an aliquot (0.1ml) of the diluted samples were inoculated on surface dried media yielding bacterial isolates. Colonies were counted to know the total viable bacterial count on the plates (expressed as colony forming unit/gram (Cfu/g) of garri). From the result obtained Mile 1 market had a mean standard deviation of 57.4 + 15.7 (white garri) and 51.6 + 21.5 (yellow garri), followed by Creek road market 46.6 + 10.2 (white garri) and 44 + 10.1 (yellow garri), then Churchill market 43.4+7.43 (white garri) and 41.8 + 9.2(yellow garri). The culture results showed growth of Staphylococcus aureus, 137 (49.3%), Staphylococcus epidermidis, 35 (12.6%), Bacillus sp., 59(21.2%), Escherichia coli, 43(15.5%), Proteus sp. 4(1.4%). The result of this study showed the presence of bacteria in gari sold in popular markets in Port Harcourt.

Facile Synthesis of Symmetric, Monofunctional Cyanine Dyes for Imaging Applications

Efficient syntheses of several members of a new class of symmetric, monocarboxylate-functionalized cyanine dyes have been developed. The synthesis is a simple two-step method, typically with greater than 60% yield and easy final product purification. The new monocarboxylate-functionalized cyanine dyes exhibit excellent water solubility and similar excitation and emission properties to those of Cy5 and Alexa Fluor 647. The application of the new dyes in cellular imaging has been demonstrated through direct conjugating of the dye with an antibody, then imaging of microtubules inside cells, visualized by near-infrared fluorescence microscopy.

Sparrows

| 129 Sparrows lisa fink Shaped like south and east, and smelling of lilacs, I am a soft voice. I am my father shooting sparrows off the roof of the Old Barn. I am feathered hop. I am bang and pop. I split open horse chestnuts in front of the house. I am hiding in the upstairs closet. I am no animals in the house. I’m an addition and a box of bunnies. I am rows and rows and rows of sweet corn, green beans, peas, I am a patch of pumpkin, a patch of cucumber. I am a patch on my father’s overalls. I love lying in the lumpy grass. I am cold cereal, but only on Monday mornings. I’m a field of alfalfa in bloom, a black dog with a slippery tongue. I am two goats eating my mother’s roses. Voices are raised in anger, and I’m afraid. I am twine strings tied around a calf’s leg. I’m a calf stuck in a birthing cow’s vagina. I am three o’clock in the morning. 130 | ecotone I am County Road 92, Highway 12. I am Pioneer Creek Road. I’m a pigeon, a barn spider. I am batteries in the refrigerator. There are dirt and early-evening thunderstorms under my fingernails. I live on rats hidden beneath planks of plywood in the farmyard, my brother with a shovel, a plank to be lifted. I am my mother eating raw hamburger out of the bowl. I am not afraid of you. I am not afraid of the dark. ...

A survey of pests of stored ginger [Zingiber officinale (Rosc.)] in some selected markets in Rivers State, Nigeria.

Two seasonal surveys were carried out in the months of March/April and June/July, 2009 to identify insect pests of stored ginger. Dried ginger was randomly obtained from old stocks in 10 local markets within the Port Harcourt metropolis and the study was laid out in a simple CRD and each treatment was replicated 4 times. Potato dextrose agar medium was used to isolate the fungi organism. The results show that mites were the most abundant (P ≤ 0.05) arthropods and they were followed by Lasioderma serricorne in stored ginger during the two sampling periods. Sample collected in March/April indicated that mean number of arthropod pests that emerged from Rumuomasi market was significantly higher (P ≤ 0.05) and the lowest number was recorded in ginger obtained from Oil Mill and Abuloma markets. Mean weight loss (g) was significantly higher in samples obtained from the fruit garden market (P ≤ 0.05). Quantitative loss due to arthropod infestation was lowest in ginger sampled from Abuloma market. In the June/July season weight loss was significantly higher in ginger obtained from Creek road (P ≤ 0.05) and the lowest weight loss (g) was recorded in ginger obtained from Rumuomasi and Mile 3 markets. Aspergilus flavus, Aspergilus niger, Fusarium oxysporium and Rhizopus sp. were isolated from the dried ginger samples with A. flavus having high occurences. The survey has shown that in Rivers State, stored ginger is not immune to arthropod pest infestation and fungal infection. It has also shown that seasonal variation affects the population dynamics of arthropod pests of stored ginger. Key words: Arthropods, ginger, fungi, pest, infestation, infection.

Serum cobalamin concentrations in healthy cats and cats with non‐alimentary tract illness in Australia

To determine a reference range for serum cobalamin concentration in healthy cats in Australia using a chemiluminescent enzyme immunoassay and to prospectively investigate the prevalence of hypocobalaminaemia in cats with non-alimentary tract disease. Prospective study measuring serum cobalamin concentrations in clinically healthy cats and cats with non-alimentary tract illness. Blood was collected from 50 clinically healthy cats that were owned by staff and associates of Veterinary Specialist Services or were owned animals presented to Creek Road Cat Clinic for routine vaccination. Blood was collected from 47 cats with non-alimentary tract illness presented at either clinic. Serum cobalamin concentration was determined for each group using a chemiluminescent enzyme immunoassay. A reference range for Australian cats calculated using the central 95th percentile in the 50 clinically healthy cats was 345 to 3668 pg/mL. Median serum cobalamin concentration in 47 cats with non-alimentary tract illness (1186 pg/mL; range 117-3480) was not significantly different to the median serum cobalamin of the 50 healthy cats (1213 pg/mL, range 311-3688). Using the calculated reference range one sick cat with non-alimentary tract illness had a markedly low serum cobalamin concentration. Although hypocobalaminaemia is uncommon in sick cats with non-alimentary tract illness in Australia, its occurrence in this study warrants further investigation.

Re: Miles & Takahashi paper on RhIg and autism

American Journal of Medical Genetics Part AVolume 146A, Issue 3 p. 405-406 Correspondence Re: Miles & Takahashi paper on RhIg and autism† Sallie Bernard, Corresponding Author Sallie Bernard sbernard@safeminds.org SafeMinds, Tyrone, Georgia Executive Director.Sensible Action for Ending Mercury-Induced Neurological Disorders (SafeMinds), 254 Trickum Creek Road, Tyrone, GA 30290.Search for more papers by this authorMark Blaxill, Mark Blaxill SafeMinds, Tyrone, Georgia Vice President.Search for more papers by this authorLyn Redwood, Lyn Redwood SafeMinds, Tyrone, Georgia President.Search for more papers by this author Sallie Bernard, Corresponding Author Sallie Bernard sbernard@safeminds.org SafeMinds, Tyrone, Georgia Executive Director.Sensible Action for Ending Mercury-Induced Neurological Disorders (SafeMinds), 254 Trickum Creek Road, Tyrone, GA 30290.Search for more papers by this authorMark Blaxill, Mark Blaxill SafeMinds, Tyrone, Georgia Vice President.Search for more papers by this authorLyn Redwood, Lyn Redwood SafeMinds, Tyrone, Georgia President.Search for more papers by this author First published: 11 December 2007 https://doi.org/10.1002/ajmg.a.32065 † How to cite this article: Bernard S, Blaxill M, Redwood L. 2007. RE: Miles & Takahashi paper on RhIg and autism. Am J Med Genet Part A 146A:405–406. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume146A, Issue31 February 2008Pages 405-406 RelatedInformation

Remittance Men and the Character of Cannon Beach

C. JILL GRADY Remittance Men and the Character of Cannon Beach ON JULY 21, 1885, the Daily Astorianreportedthislocalnews: Frederick Logan and Joseph Walsh, ranchmen at Seaside, Clatsop, arrived in town on Saturday.They came via Tillamook and ForestGrove,making the trip in threeand a half days. They representthe journey as a pleasant one, although the trailshad tobe opened at several points. These gentlemen are en route to the Kootenai country where they propose to establish a stock ranch on an extensive scale. The Kootenay country and other places inBritish Columbia such asVictoria andWalhacin and Cannington Manor in Saskatchewan were being promoted fordevelopment by British emigrants. William Adolph Baillie-Grohman, a wealthy Englishman, envisioned transforming the East Kootenay bottom land into an agricultural paradise, settled exclusively by and for refined Brit ish gentlemen.1 Herbert Frederick Logan and JosephWalsh were two such gentlemen, part of a group of young British bachelors living in theUnited States and Canada as "remittance men." All had arrived inNorth America with some British pounds to invest and hopes and dreams of achieving financial success. In the end, Logan and Walsh chose not to settle in Canada. Instead, they returned to theOregon coast to pursue opportunities in the fledgling destination resort of Seaside and its environs. The twomen homesteaded and developed the south side of Tillamook Head, then known as Elk Creek and now named Cannon Beach. Logan, Walsh, and other British remittance men cleared and surveyed most of the nine-mile beach. They homesteaded there, built their own cottages, and then built cottages for their neighbors. Logan organized the Elk Creek Road Company in 1890 with a group of 68 OHQ vol. 108, no. 1 ? 2007 Oregon Historical Society Unless otherwisenoted, all photos courtesyofCannon Beach Historical Society The Griffin family'sfirsthouse, shown here in the 1890s, was locatedatArcadia Beach, northof thehomestead ofJoe Walsh, one ofCannon Beach's remittance men. Seaside businessmen. He provided most of themoney necessary to build the firstwagon road from Seaside over Tillamook Head and operated itas a toll road. On his 158-acre homestead, which spanned Elk Creek (now Ecola Creek), near where the bridge stands today, he constructed and operated the second resort hotel inCannon Beach.2 JohnDelbert Griffin, inReflections on Early Cannon Beach, writes that "a number of bachelors had come over from England and were known as remittance men."3 "Remittance" refers to the financial support some British men received while living away from home, either as an advanced lump sum ofmoney to help them relocate and settle in theUnited States or through regular deposits of British pounds into a local bank.4 According to historian Lee Olson: The thingthattheyall had incommon was thattheyhad family money tohelp them seek their fortunes. Itmay have come as a lump settlement; more often it came as a Grady,Remittance Men and theCharacter ofCannon Beach 69 Herbert Logan organized theElk Creek Road Company in 1890 toconstructthe twistingtollroad overTillamook Head from Seaside toElk Creek (today'sCannon Beach). check or money draft ? a periodic remittance on a monthly, semiannual, or annual schedule. And there were instances when a young man got money by writing home in desperate need. The latter case was frequent when a young man found he was patheti callymismatched against theharsh landhe had chosen forsettlement.5 The remittance man period lasted from the 1870s to the beginning of World War I. References to remittance men are peppered throughout the oral histories found in the archive of the Cannon Beach Historical Society.6 Some citi zens of Cannon Beach remember the local remittance men as lazy, shiftless alcoholics who relied on their payments from home rather than working at a job. Yet, it is clear that the remittance men inCannon Beach played a significant role in settling the area, and they appear to have had a strong influence on the town's character. Several people who have livedmost of their lives inCannon Beach remember remittance men working at odd jobs around town in connection with the early construction and maintenance of tourist rental cottages and summer homes. As small children, they heard 70 OHQ vol. 108, no. 1 stories about the remittance men, told by town locals who gave themen nicknames such as...

NASA Glenn Research Center Creek Road Complex—Cryogenic Testing Facilities

Due to expansion at neighboring Cleveland Hopkins Airport, several NASA Glenn Research Center (GRC) facilities have been relocated to the Creek Road Complex. The complex consists of the Small Scale Multi-purpose Research Facility (SMiRF), Cryogenic Components Lab Cell 7 (CCL-7), and a shop building. The facilities have been updated and include state-of-the art technology. SMiRF is a liquid hydrogen/liquid nitrogen (LH 2/LN 2) test facility used to conduct research in a 7400 L vacuum chamber. The chamber simulates space environment and launch vehicle ascent profile. SMiRF handles 5680 L of LH 2. CCL is a LH 2/LN 2 facility to perform small scale proof of concept tests for components and processes. It handles 1130 L of liquid hydrogen. Both facilities handle cryogens at sub-atmospheric pressures.

A revision of the water beetle genus Gymnochthebius Orchymont (Coleoptera: Hydraenidae) for Australia and Papua New Guinea

The Australian and Papua New Guinean species of the water beetle genus Gymnochthebius Orchymont, 1943, are revised, based on the study of 4,904 specimens. The genus is redescribed, and redescriptions are provided for G. australis (Blackburn), G. brisbanensis (Blackburn), G. clarki (Deane), G. levis (Deane), G. lividus (Deane), G. notalis (Deane), and G. tenebricosus (Deane). Lectotypes are designated for Ochthebius australis Blackburn, 1888, and Ochthebius tenebricosus Deane, 1931. Ochthebius fischeri Deane, 1931, and Ochthebius leai Deane, 1931, are synonymized with Ochthebius australis Blackburn, 1888; Ochthebius flavocinctus Deane 1933, is synonymized with Ochthebius lividus Deane, 1933; and Ochthebius angustipennis Deane, 1931, is synonymized with Ochthebius clarki Deane, 1931. Twenty-nine new species are described, and a key to the 36 species known from Australia and Papua New Guinea is given. High resolution digital images of all primary types are presented (online version in color), the male genitalia are illustrated, and Australian geographic distributions are mapped. Only one species, G. clarki, inhabits both Australia and Papua New Guinea; two species, G. bacchusi n. sp. and G. papua n. sp. are endemic to Papua New Guinea; 33 species are endemic to Australia. Members of Gymnochthebius are found at the gravelly/sandy/silty margins of flowing and standing water. A preliminary grouping of species according to microhabitat substrate is presented. Correspondences between ventral morphology and microhabitat preferences suggest that a few species are evolving toward humicolous habits. New species of Gymnochthebius are: G. angulonotus (Queensland, Tinaroo Creek Road via Mareeba), G. bacchusi (Papua New Guinea, Morobe District, c. 7 miles Lae Bulolo Road), G. benesculptus (South Australia, Warburton River, 1 km N White Bull Yard Kalamurina Stn.), G. coruscus (South Australia, Warburton River, 1 km N White Bull Yard Kalamurina Stn.), G. fontinalis (South Australia, Elizabeth (Mound) Springs, 7 km NW Coward Springs R.S.), G. fumosus (New South Wales, Sydney), G. hesperius (Western Australia, Lyndon River Bridge), G. inlineatus (Western Australia, Millstream, creek near Deep Reach), G. lustrosulcus (Queensland, Cloncurry), G. minipunctus (Northern Territory, Palm Valley), G. nanosetus (Northern Territory, Roderick Creek, Gregory National Park), G. nicki (Victoria, Possum Hollow falls, West branch Tarwin River, 5.6 km SSW Allambee), G. nigriceps (South Australia, Mound Spring near Coward Springs), G. papua (Papua New Guinea, Morobe District, ca. 10 km S Garaina Saureri), G. perpunctus (South Australia, Somme Creek, between Angaston and Sedan), G. pluvipennis (South Australia, Warburton

Regional and local vegetation community dynamics of the Eocene Okanagan Highlands (British Columbia – Washington State) from palynology

Palynofloras from the middle Early to early Middle Eocene Okanagan Highlands (northern Washington State and southern British Columbia) are used to reconstruct vegetation across a broad upland Eocene landscape. In this preliminary report, forest floristic composition is reconstructed using palynological analysis of sediments from Republic, Washington; localities of the Allenby Formation in the Princeton region (Hospital Hill, One Mile Creek and Summers Creek Road), Hat Creek, McAbee, Falkland, Horsefly, and Driftwood Canyon, British Columbia. Wind-dispersed taxa were dominant in all samples, consistent with floras preserved in lacustrine and paludal depositional environments. Pseudolarix was dominant in five of the floras, but Abies (Falkland) or Ulmus (Republic Corner Lot site) were dominant in individual samples for some floras. Betulaceae were dominant for McAbee (Alnus) and Allenby Formation (Betula), matching megafloral data for these sites. Some taxa common to most sites suggest cool conditions (e.g., Abies, other Pinaceae; Alnus, other Betulaceae). However, all floras contained a substantive broad-leaved deciduous element (e.g., Fagaceae, Juglandaceae) and conifers (e.g., Metasequoia) indicative of mesothermal conditions. Palms were only abundant in the Hat Creek coal flora, with very low counts recorded for the Falkland, McAbee, and Allenby Formation sites, suggesting that they were rare in much of the landscape and likely restricted to specialized habitats. Thermophilic (principally mesothermal) taxa, including palms (five sites) and "taxodiaceous" conifers, may have occurred at their climatic limits. The limiting factor controlling the regional distribution of thermophilic flora, which include primarily wetlands taxa, may be either climatic or edaphic.

Evaluation of In-Service Performance of Tom’s Creek Bridge Fiber-Reinforced Polymer Superstructure

The Tom's Creek Bridge is a small-scale demonstration project involving the use of fiber-reinforced polymer (FRP) composite girders as the main load carrying members. It is a simply supported, short-span bridge located along Tom's Creek Road in Blacksburg, Virginia. As a result of discussions among Virginia Tech, Strongwell, the Virginia Department of Transportation, and the Town of Blacksburg, the existing deteriorated superstructure of the Tom's Creek Bridge was replaced with a glue-laminated timber deck on 8 in. (20.3 cm) deep pultruded FRP beams. The project was intended to address two issues. First, by calculating bridge design parameters such as the dynamic load allowance, transverse wheel load distribution and deflections under service loading, the Tom's Creek Bridge will aid in modifying current AASHTO bridge design standards for use with FRP composite materials. Second, by evaluating the FRP girders after being exposed to controlled laboratory and service conditions, the project will begin to answer questions about the long-term performance of these advanced composite material beams when used in bridge design. A dynamic load allowance, IM, of 0.90 is recommended for the Tom's Creek Bridge. This value is the largest average IM observed and is therefore conservative. This value is significantly higher than those set forth in the AASHTO standards of 0.33 (AASHTO, 1998) and 0.30 (AASHTO, 1996). It is recommended to use a value of L/425 (LRFD Specification) or L/500 (Standard Specification). This value is consistent with AASHTO deflection control criteria for an all timber bridge. It is recommended to use the AASHTO wheel load distribution factors for a glulam timber deck on steel stringer bridge. There is no indication of loss of FRP girder ultimate strength after 15 months of service. Given the low service loads (no more than 10% of the ultimate capacity) and traffic volume the fatigue life prediction model suggests that fatigue will not be a major concern during the life of service (10 to 15 years).

Bracken (Pteridium aquilinum L.) frond biomass and rhizosphere microbial community characteristics are correlated to edaphic factors

Bracken is a broadly distributed weedy fern common in disturbed habitats. Frond and rhizosphere soil samples were obtained from bracken growing in three clearcut locations in the Willamette National Forest in western Oregon. The highest frond biomass was correlated with soil having the highest total %N, lowest Fe content and oldest geological age. Based on analysis of variance of principal component scores for patterns of utilization of substrates on Biolog GN plates, metabolic profiles of rhizosphere microbial communities of bracken differed significantly between locations. Utilization of carbohydrates and phosphorylated compounds was positively correlated with organic matter (OM) and total N and negatively correlated with extractable Fe and Mn content of soil. Carboxylic acid utilization was positively correlated with pH and OM and negatively correlated with extractable Mn and P content of soils. Pseudomonas rDNA fingerprints of bracken rhizosphere samples suggested that the diversity of pseudomonads at the location with the most acidic (pH 5.5) soil (Burnside Road) differed from those at less acidic (pH 6.2 and 6.1) locations (Falls Creek and Toad Road). Mycorrhizal infection of bracken was lowest at Falls Creek, the location with the highest %N soil content. Our results suggest that bracken frond biomass and rhizosphere microbial community characteristics are correlated with local edaphic factors such as soil chemistry and geological age.

About That Swing: "Sleaze" Dancing and Community Norms at River Falls Lodge

It's 6:15 on a Saturday evening in late spring. You've been driving less than an hour along U.S. Highway 276 from Greenville, South Carolina, past Traveler's Rest and Marietta, looking for an F Mart store and signs for Jones Gap State Park and River Falls Road. When you come to the junction, you turn right and follow the road four miles or so. Just after you pass the fire station and Gap Creek Road, you turn right on River Falls Lodge Road and go down the hill. At the bottom there's a low, ramshackle building surrounded by trees and a number of oddball sculptures, with outdoor furniture on a concrete patio in front. This is River Falls Lodge, located in a cove on the Middle Saluda River, a mile or so below the escarpment of the Blue Ridge Mountains that forms the border between the Carolinas. It is here that the Greenville-based Harvest

Carbon Isotope Excursion in Atmospheric CO 2 at the Cretaceous-Tertiary Boundary: Evidence from Terrestrial Sediments

Other| August 01, 2000 Carbon Isotope Excursion in Atmospheric CO2 at the Cretaceous-Tertiary Boundary: Evidence from Terrestrial Sediments NAN CRYSTAL ARENS; NAN CRYSTAL ARENS 1Department of Integrative Biology, University of California, Berkeley, CA 94720 Search for other works by this author on: GSW Google Scholar A. HOPE JAHREN A. HOPE JAHREN 2Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD 21218 Search for other works by this author on: GSW Google Scholar PALAIOS (2000) 15 (4): 314–322. https://doi.org/10.1669/0883-1351(2000)015<0314:CIEIAC>2.0.CO;2 Article history accepted: 02 May 2000 first online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation NAN CRYSTAL ARENS, A. HOPE JAHREN; Carbon Isotope Excursion in Atmospheric CO2 at the Cretaceous-Tertiary Boundary: Evidence from Terrestrial Sediments. PALAIOS 2000;; 15 (4): 314–322. doi: https://doi.org/10.1669/0883-1351(2000)015<0314:CIEIAC>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyPALAIOS Search Advanced Search Abstract A −1.5‰ to −2‰ carbon isotope excursion immediately above the clay layer that defines the Cretaceous-Tertiary (K/T) boundary has been reported in marine sediments world wide. This paper reports a similar −1.5‰ to −2.8‰ carbon isotope excursion recorded by C3 land plants from three temporally-controlled, stratigraphically-constrained terrestrial sections in the Western Interior of North America (Garfield County, Montana, and Slope County, North Dakota). Carbon isotope measurements of bulk sedimentary organic carbon were well-correlated with those of isolated plant cuticle, suggesting that the terrestrial organic carbon signature in these sediments parallels that of plant cuticle. Carbon isotope signatures were also independent of rock type and depositional environment, showing that the carbon isotope signature of plants, although altered, is not biased taphonomically. Because the signature in terrestrial facies records the isotope composition of paleoatmospheric CO2, this record—combined with that from marine sections—offers additional insight into changes in carbon cycling underlying the K/T negative carbon isotope excursion. For example, radiometric age determinations from the Hell Creek Road locality in Montana bracket the atmospheric carbon isotopic recovery between 65.00 ± 0.05 Ma and 65.16 ± 0.04 Ma. This reflects a more rapid recovery for the terrestrial biosphere than for that of the marine realm, perhaps due to lower extinction rates in land plants than in marine primary producers. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Chemical Aspects of Polymeric Electroluminescent Devices

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical Aspects of Polymeric Electroluminescent DevicesJames R. Sheats, Ying-Lan Chang, Daniel B. Roitman, and Andrew StockingView Author Information Hewlett-Packard Laboratories, 3500 Deer Creek Road, Palo Alto, California 94304 Cite this: Acc. Chem. Res. 1999, 32, 3, 193–200Publication Date (Web):February 19, 1999Publication History Received15 July 1998Published online19 February 1999Published inissue 1 March 1999https://doi.org/10.1021/ar980061qCopyright © 1999 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views384Altmetric-Citations55LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit Read OnlinePDF (183 KB) Get e-AlertsSUBJECTS:Electrodes,Ions,Polymers,Scanning tunneling microscopy,Work function Get e-Alerts

Epiphyllous Hepatics from Southern Alabama

Epiphyllous Hepatics from Southern Alabama