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agricultural education; boiling; developed countries; extension education; farmers; models; professionals; volunteers; Afghanistan; California
Abstract:
... For nearly four decades the University of California, Davis, International Programs Office has worked with global partners to build the agricultural capacity of countries in terms of research, extension, and education. With a focus on extension in lesser developed countries, we have developed an innovative framework for teaching extension professionals how to effectively encourage adoption of much ...
biodiversity; data collection; ornithology; taxonomy; California
Abstract:
... Online systems for observation reporting by citizen scientists have been operating for many years. iNaturalist (California Academy of Sciences 2016), eBird (Cornell Lab of Ornithology 2016) and Observado (Observation International 2016) are well-known international systems, Artportalen (Swedish Species Information Centre 2016) and Artsobservasjoner (Norwegian Biodiversity Information Centre 2016) ...
farm labor; farms; focus groups; heat; industry; summer; working conditions; California
Abstract:
... Heat-related illness (also called heat illness) is a recurring and avoidable condition that results in multiple deaths in California farm fields every year. We conducted five focus groups as part of the California Heat Illness Prevention Study (CHIPS) in Fresno, California, during the summer of 2013. We used qualitative coding methods to analyze focus group transcript data with consideration of wo ...
viticulture; Vitis vinifera; Eotetranychus willamettei; population dynamics; Tetranychus pacificus; California
Abstract:
... Grape vineyards, Vitis vinifera L., in the San Joaquin Valley that support populations of Willamette spider mites, Eotetranychus willamettei (McGregor), tend not to have outbreaks of Pacific spider mites, Tetranychus pacificus McGregor. Pacific spider mites are considered the more economically damaging of the mite species on grapes in this region. Earlier, small-scale experiments indicated strong ...
... The grapevine (Vitis vinifera L.) is one of the most widely grown fruit plants, with table grapes accounting for at least 20% of the total world production. A few traditional table grape cultivars have achieved great international prominence. Among the most important cultivars is 'Cardinal', a historical Californian grapevine obtained by E. Snyder and F. Harmon in 1939 by crossing 'Flame Tokay' (s ...
cultural landscape; environmental management; geography; governance; issues and policy; land use planning; politics; problem solving; public services and goods; society; stakeholders; California
Abstract:
... At the core of land use and governance debates in the United States are purported dualities: economy vs. environment, public goods vs. private rights, and the merits and demerits of regulation. While such dichotomies are inevitably partial, they offer a heuristic to interrogate the deeper nuances of a problem or process. I investigate these dichotomies in one site (Calaveras County, California) al ...
arsenic; bioavailability; chemical analysis; chemical speciation; ferrihydrite; fluorescence; goethite; iron; iron hydroxides; mine tailings; mining; particle size; prediction; sorption; spectral analysis; spectroscopy; toxicity; weathering; California
Abstract:
... The chemical speciation and distribution of potentially toxic metal(loid)s in mine wastes is critical to assessing the risks posed by these wastes and predicting the potential bioavailability of the metal(loid)s present. Of additional potential importance is the role of particle size in the fate, transport, and toxicity of contaminated mining materials. Spectroscopic analyses of size-separated min ...
Anelaphus; insect pheromones; aggregation pheromones; bioassays; gender differences; insect traps; males; females; chemical composition; scanning electron microscopy; animal tissues; pheromone glands; insect behavior; California
Abstract:
... We report the identification and field bioassays of a major component of the maleproduced aggregation pheromone of Anelaphus inflaticollis Chemsak, an uncommon desert cerambycine beetle. Male A. inflaticollis produced a sex-specific blend of components that included (R)-3-hydroxyhexan-2-one, (S)-2-hydroxyhexan-3-one, 2,3-hexanedione, and (2R,3R)- and (2R,3S)2,3-hexanediols. Field trials with baite ...
community supported agriculture; data collection; farmers; markets; models; surveys; California
Abstract:
... Community Supported Agriculture (CSA) faces substantial challenges in increasingly saturated and competitive markets in which competitors highlight their localness. Retention of members is crucial for the model to provide benefits to farmers; otherwise, excessive losses of members requires considerable recruitment efforts and undercuts farmer well-being. We conducted statewide research on CSAs in ...
United States Environmental Protection Agency; groundwater contamination; human health; pollutants; water utilities; California
Abstract:
... 1,2,3‐Trichloropropane, or TCP, is considered one of the most persistent organic groundwater contaminants and is linked to cancers and numerous damaging human health effects. The US Environmental Protection Agency has issued guidance on TCP and since it's not federally regulated, some states have established their own maximum contaminant levels. California's stringent TCP regulations and guideline ...
... This paper provides both a detailed history of environmental change in the Sierra Nevada over the past 1,800 years and evidence for climate teleconnections between the Sierra Nevada and Greenland during the late Holocene. A review of Greenland ice core data suggests that the magnitudes of abrupt changes in temperature and precipitation increased beginning c. 3,700 and 3,000 years ago, respectively ...
... Excessive heat affects the fertility of high production lactating cows, and reduced pregnancy rates (PR) are observed during summer and early fall. Embryo production programs are used to produce more calves from high genetic merit animals, but could it also increase fertility by bypassing all the negative variables affecting the embryo development before Day 7 (oocyte development, ovulation, ferti ...
USDA; algorithms; cropland; environmental assessment; food security; normalized difference vegetation index; precision agriculture; reflectance; spatial data; time series analysis; California; South Dakota
Abstract:
... The 30 m resolution U.S. Department of Agriculture (USDA) crop data layer (CDL) is a widely used crop type map for agricultural management and assessment, environmental impact assessment, and food security. A finer resolution crop type map can potentially reduce errors related to crop area estimation, field size characterization, and precision agriculture activities that requires crop growth infor ...
... Maddox Dairy, located in Riverdale, CA, USA, is a Holstein herd that milks 3500 cows with a 305-day mature-equivalent milk production of 12 800 kg, and they have been producing high genetic animals by embryo transfer (ET) since the early 1980s. Invivo-derived embryos from Holstein donors were transferred fresh (grade 1 or 2) or frozen (grade 1), at morula (4), early blastocyst (5), or blastocyst ( ...
... Diatom, pollen, silicoflagellate, and biogenic opal analyses from a 155 cm-long gravity core from Pioneer Seamount, offshore Santa Cruz, California (PS1410-06 GC, latitude 37.3°N, longitude 123.4°W, water depth 2165 m) are compiled for the last ~11,300 years and compared with those of ODP 1019 and TN062-O550 from northern California. The relative abundance record of the subtropical diatom Fragilar ...
DNA; German Landrace; National Center for Biotechnology Information; Pietrain; X chromosome; autosomes; blastocyst; boars; embryogenesis; gene expression; genes; genome assembly; in vitro fertilization; messenger RNA; microRNA; nitrogen; ovulation; pH; sows; spermatozoa; statistical analysis; transcription (genetics); uterus; California
Abstract:
... X-Chromosome inactivation in female mammals starts during early blastocyst stage with expression of the X-inactive specific transcript (XIST), which coats and silences the inactive X chromosome. However, this compensation is not complete in blastocysts, as a large number of X-linked transcripts are more highly expressed in female embryos than in males. Furthermore, the process of X chromosome inac ...
agricultural research; chemistry; climate change; food production; food security; health promotion; pesticides; plant protection; pollinators; population growth; risk assessment; California
Abstract:
... This introductory paper provides an overview of Perspectives papers written by plenary speakers from the 13th IUPAC International Congress of Pesticide Chemistry held in San Francisco, CA, USA, in August 2014. This group of papers emphasizes some of the emerging issues and challenges at the forefront of agricultural research: sustainability; agriculture’s response to climate change and population ...
... This research examines how the controls of fire episode frequency in the northern Sierra Nevada have varied at different temporal scales through the Holocene. A 5.5 m long sediment core was collected from Lily Pond, a ~2.5 ha lake in the General Creek Watershed on the west shore of Lake Tahoe in the northern Sierra Nevada in California, USA. Dendrochronology was used to reconstruct the recent hist ...
... The use of cryopreserved semen for insemination of mares facilitates breeding management but often results in reduced conception rates. This has been mainly attributed to changes in sperm membrane function caused by the freezing-thawing procedure. However, semen processing may also contribute to epigenetic changes in spermatozoa. In the present study, we therefore addressed changes in sperm DNA-me ...
... A worldwide decline of fertility in Holsteins requires the reliable evaluation of fertility traits. Because of the low heritability of most fertility traits, the reliabilities of bull estimated breeding values (EBV) for these traits are usually low. Recent developments in molecular genetics have opened the possibilities of identifying and using genomic variation that can significantly boost the re ...
... This fourth article in an ongoing series of articles published in the Journal of Veterinary Medical Education on veterinary education and the veterinary profession provides information on the colleges and schools that exist in the US in 2011. This article provides a brief description of the educational programs and recent accreditation of the veterinary schools at Western University of the Health ...
Agricultural Research Service; X chromosome; Y chromosome; boars; centrifugation; cold; complementary DNA; cryopreservation; data collection; deoxyribonucleases; digestion; freeze-thaw cycles; genes; grants; messenger RNA; mitochondria; mitochondrial RNA; mitochondrial genome; non-coding RNA; reverse transcriptase polymerase chain reaction; ribosomal RNA; small nuclear RNA; spermatozoa; transcription (genetics); California
Abstract:
... Fertility of cryopreserved spermatozoa is significantly reduced compared with that of their fresh counterparts, which is certainly due to the inflicted sublethal damage to spermatozoa that is observed at various molecular and cellular levels. The identification and characterisation of this damage will help us better understand sperm cryobiology and therefore develop suitable media and procedures t ...
... Histone deacetylase (HDAC) inhibitors have been applied to cancer research for a therapeutic purpose or somatic cell nuclear transfer for improvement of embryonic reprogramming. Considering the ubiquitous expression of HDAC in normal cells, effects of HDAC inhibitors on normal cells need to be evaluated in detail. Therefore, we aimed to investigate molecular mechanisms of HDAC inhibitor-induced ap ...
Jaeschke, Andrea; Op den Camp, Huub J.M.; Harhangi, Harry; Klimiuk, Adam; Hopmans, Ellen C.; Jetten, Mike S.M.; Schouten, Stefan; Sinninghe Damsté, Jaap S.
... Anammox, the oxidation of ammonium with nitrite to dinitrogen gas under anoxic conditions, is an important process in mesophilic environments such as wastewaters, oceans and freshwater systems, but little is known of this process at elevated temperatures. In this study, we investigated anammox in microbial mats and sediments obtained from several hot springs in California and Nevada, using geochem ...
... This autumn, 95 scientists and students from the Rocky Mountain area, along with invited speakers from Colorado, California, Montana, Florida, Louisiana, New York, Maryland, and India, attended the 19th annual meeting of the Rocky Mountain Virology Association that was held at the Colorado State University Mountain Campus located in the Rocky Mountains. The two-day gathering featured 30 talks and ...
Microtus californicus; environmental factors; equations; grasslands; population dynamics; sociodemographic characteristics; time series analysis; voles; weather; wildlife; California
Abstract:
... This report involves time—series statistical analysis (including concurrent physical and community variables) of the population dynamics of 4737 voles (Microtus californicus) trapped over 19 yr while emigrating from two study enclosures on a Northern California grassland. Population fluctuation of voles, as documented in the literature as well as in this study, generally cannot be described by per ...
nuclear magnetic resonance spectroscopy; metabolomics; wines; wine grapes; wine cultivars; principal component analysis; metabolites; wine quality; food analysis; food composition; provenance; standards of identity; South Korea; France; California; Australia
Abstract:
... 1H NMR spectroscopy was used to investigate the metabolic differences in wines produced from different grape varieties and different regions. A significant separation among wines from Campbell Early, Cabernet Sauvignon, and Shiraz grapes was observed using principal component analysis (PCA) and partial least squares-discriminant analysis (PLS-DA). The metabolites contributing to the separation wer ...
cotton; organic production; Zea mays; heat treatment; harvesting equipment; fiber quality; insect pests; pest control; California; New Mexico; Texas
Abstract:
... Organic cotton production requires alternatives to havest aid chemicals for crop termination and fiber quality preservation. In these trials, a self-propelled two-row thermal defoliation apparatus was tested in spindle picked and stripper harvested cotton. HVI classing data for thermal, chemical, and untreated control plots were compared. Fiber property data from similar trials in 2002 were presen ...
Essam M. Abdelfattah; Pius S. Ekong; Emmanuel Okello; Deniece R. Williams; Betsy M. Karle; Joan D. Rowe; Edith S. Marshall; Terry W. Lehenbauer; Sharif S. Aly
adults; animal and human health; antibiotic resistance; dairy industry; drugs; education; laws and regulations; questionnaires; surveys; veterinarians; California
Abstract:
... Antimicrobial resistance (AMR) is a global issue for both human and animal health. Antimicrobial drug (AMD) use in animals can contribute to the emergence of AMR. In January 2018, California (CA) implemented legislation (Senate Bill 27; SB 27) requiring veterinary prescriptions for medically important AMD use in food animals. The objective of our survey was to characterize AMD use, health manageme ...
biogeography; climate; ecosystems; fire history; fire season; fire severity; fuels; historical records; people; resource management; socioeconomics; vapor pressure deficit; vegetation types; wildfires; wildlife; wind speed; California
Abstract:
... AIM: Wildfire burned area, fire size, fire severity and the ecological and socio‐economic impacts of fire have been increasing rapidly in California in recent decades. We summarize the record‐breaking 2020 wildfire season in California statistically, evaluate the drivers of high‐severity burning in the 2020 fires and consider implications for fire and resource management. LOCATION: California, USA ...
... The Trinity Alps is a compact glaciated subrange of the Klamath Mountains in northwest California with elevations < 2,750 m making it a unique location in the western US to study glacier change. We examined glacier change since the last Little Ice Age advance in the late 19th century by mapping historic glacier areas using clearly defined moraines. At least six glaciers existed in the Trinity Alps ...
El Nino; La Nina; atmospheric precipitation; climate models; drought; evapotranspiration; greenhouse gas emissions; meteorological data; ocean warming; runoff; seasonal variation; simulation models; snowpack; surface water; surface water temperature; water resources; winter; California; Pacific Ocean; Sierra Nevada (California)
Abstract:
... Greenhouse gas induced climate change is expected to lead to negative hydrological impacts for southwestern North America, including California (CA). This includes a decrease in the amount and frequency of precipitation, reductions in Sierra snow pack, and an increase in evapotranspiration, all of which imply a decline in surface water availability, and an increase in drought and stress on water r ...
... Superovulation is a routine procedure to stimulate growth and ovulation of multiple follicles. However, the hormonal changes in the reproductive tract after superovulation treatment affect the environment and subsequently the early embryo development. The aim of the study was to examine the effect of superovulation pretreatment on embryo development and gene expression of IVM/IVF derived embryos s ...
Schoenoplectus; carbon; cesium; estuaries; freshwater; geochemistry; gold; lead; macrophytes; marshes; mercury; mining; mixing; peat; radionuclides; river water; seawater; statistical models; strontium; tracer techniques; uranium; water salinity; California; Sacramento River; San Joaquin River
Abstract:
... The purpose of this study was to determine the history of paleosalinity over the past 6000+ years in the Sacramento-San Joaquin Delta (the Delta), which is the innermost part of the San Francisco Estuary. We used a combination of Sr and U concentrations, δ87Sr values, and 234U/238U activity ratios (AR) in peat as proxies for tracking paleosalinity. Peat cores were collected in marshes on Browns Is ...
... Progestational-induced changes in endometrial gene expression that are essential for maintenance of pregnancy have been reported in several species. In the horse, serum progesterone (P4) concentrations are routinely measured to assess progestational support of pregnancy and low P4 is implicated as a cause of embryo loss; however, there is little information available concerning changes in the endo ...
X-radiation; computed tomography; crushing; data collection; granodiorite; California
Abstract:
... Granodiorite material from a rock quarry in California was prepared by first quarrying large boulders, and then crushing them down to smaller sizes. A range of particle widths, from 0.0175mm to 45.1mm, taken from material from a nominal sieve range of 20μm to 38mm, was scanned using X-ray computed tomography (X-ray CT) and the shape of individual particles obtained from the resulting 3-D images wa ...
Pinus ponderosa; canopy; climate change; data collection; fertilizers; forest growth; forest management; forests; gas exchange; growth models; leaf area index; leaves; light intensity; managers; plant tissues; plantations; prediction; sap flow; shrubs; stable isotopes; temporal variation; transpiration; tree growth; trees; understory; vapor pressure; water vapor; California
Abstract:
... Models can be powerful tools for estimating forest productivity and guiding forest management, but their credibility and complexity are often at issue for forest managers. We parameterized a process-based forest growth model, 3-PG (Physiological Principles Predicting Growth), to simulate growth of ponderosa pine (Pinus ponderosa) plantations in Northern California. We used data collected from the ...
Ambrosia dumosa; Larrea tridentata; aboveground biomass; canopy; community structure; demographic statistics; long term effects; root growth; shrubs; species recruitment; territoriality; xylem; California; Mojave Desert
Abstract:
... In 1977 an experiment was initiated in the Mojave Desert to investigate the relationship between shrub interactions and structure in a community dominated by Ambrosia dumosa and Larrea tridentata. Here, as in much of the Mojave, Larrea were regularly distributed, Ambrosia occurred in aggregations, and the two were randomly distributed relative to each other. Pre‐dawn xylem pressure potentials (PDX ...
... Persistent organic pollutants are stored in environmental reservoirs globally. Tracking the mass and movement of these pollutants is critical for assessing environmental health for human and wildlife populations. Recently, glaciers have been identified as secondary reservoirs for persistent organic pollutants. Downstream lakes and rivers have increased risk of exposure with climate change and loss ...
... To assess the extent of inhibitory activity of the host compound 4-allylanisole, we conducted field studies with three scolytid species. These species are geographically widespread and economically important. Trials were completed with Dendroctonus brevicomis LeConte (California), D. ponderosae Hopkins (Oregon), and Ips pini (Say) (Wisconsin) by using multiple-funnel traps with appropriate pheromo ...
... A 39-cm sediment core from Castle Lake, California (USA) spans the last ~ 450 years and was analyzed for diatoms and organic geochemistry (δ¹⁵N, δ¹³C, and C:N), with the goal of determining sensitivity to natural climate variation and twentieth century anthropogenic effects. Castle Lake is a subalpine, nitrogen-limited lake with ~ 5 months of annual ice cover. Human impacts include light recreatio ...