scholarly journals A multi-isotope (B, Sr, O, H, and C) and age dating (3H-3He and14C) study of groundwater from Salinas Valley, California: Hydrochemistry, dynamics, and contamination processes

2002 ◽  
Vol 38 (1) ◽  
pp. 9-1-9-17 ◽  
Author(s):  
Avner Vengosh ◽  
Jim Gill ◽  
M. Lee Davisson ◽  
G. Bryant Hudson
Keyword(s):  
Age Dating ◽  
Salinas Valley

Radiocarbon Age Dating of 1,000-Year-Old Pearls from the Cirebon Shipwreck (Java, Indonesia)

2017 ◽  
Vol 35 (8) ◽  
pp. 728-736 ◽  
Author(s):  
Michael S. Krzemnicki ◽  
Laurent E. Cartier ◽  
Irka Hajdas
Keyword(s):  
Age Dating ◽  
Radiocarbon Age

Simple Relationship Quality Measures

2020 ◽  
Author(s):  
Sylvia Niehuis
Keyword(s):  
Convergent Validity ◽  
Online Survey ◽  
Romantic Partners ◽  
Age Dating ◽  
Simple Relationship ◽  
Cross Sectional ◽  
Single Item ◽  
College Age ◽  
Close Relationship ◽  
Dating Couples

Issues in applied survey research, including minimizing respondent burden to encourage survey completion and the increasing administration of questionnaires over smartphones, have intensified efforts to create short measures. We conducted two studies to examine the psychometric properties of single-item measures of four close-relationship variables: satisfaction, love, conflict, and commitment. Study 1 was longitudinal, surveying an initial sample of 121 college-age dating couples at three monthly phases. Romantic partners completed single- and multi-item measures of the four constructs, along with other variables, to examine test-retest reliability and convergent (single-item measures with their corresponding multi-item scales), concurrent, and predictive validity. Our single-item measures of satisfaction, love, and commitment exhibited impressive psychometric qualities, but our single-item conflict measure performed somewhat less strongly. Study 2, a cross-sectional online survey (n = 280; mainly through Facebook), showed strong convergent validity of the single-item measures, including a .60 correlation between single- and multi-item conflict measures.

AGE DATING SEDIMENT TO ESTABLISH GEOCHRONOLOGY OF MID-ATLANTIC FLOODPLAINS AND SEDIMENT WAITING TIME DISTRIBUTIONS

2016 ◽  
Author(s):  
Katherine Skalak ◽  
◽  
James Pizzuto ◽  
Diana Karwan ◽  
Adam Benthem ◽  
...  
Keyword(s):  
Waiting Time ◽  
Age Dating ◽  
Waiting Time Distributions

RESULTS FROM AGE-DATING AND PALEOSEISMIC TRENCHING ALONG THE LAKESIDE AND LITTLE FORK CHURCH FAULTS IN THE CENTRAL VIRGINIA SEISMIC ZONE

2018 ◽  
Author(s):  
Anne C. Witt ◽  
◽  
Mark W. Carter ◽  
Matthew J. Heller ◽  
David B. Spears ◽  
...  
Keyword(s):  
Age Dating ◽  
Seismic Zone

scholarly journals Bacterial Leaf Spot of Celery in California: Etiology, Epidemiology, and Role of Contaminated Seed

Plant Disease ◽  
1997 ◽  
Vol 81 (8) ◽  
pp. 892-896 ◽  
Author(s):  
E. L. Little ◽  
S. T. Koike ◽  
R. L. Gilbertson
Keyword(s):  
Pseudomonas Syringae ◽  
Leaf Spot ◽  
Disease Incidence ◽  
Field Tests ◽  
Hot Water ◽  
Disease Development ◽  
Bacterial Leaf Spot ◽  
Overhead Irrigation ◽  
Celery Seed ◽  
Salinas Valley

Pseudomonas syringae pv. apii, causal agent of bacterial leaf spot (BLS) of celery, was first identified in California in 1989. By 1991, BLS was apparent in all celery-growing areas of the state. Greenhouse-produced transplants were affected most severely, and disease incidence approached 100% in some greenhouses. In this study, sources of inoculum and factors contributing to disease development were investigated in three Salinas Valley greenhouse operations during the 1991, 1992, and 1993 celery transplant seasons (January to August). Epiphytic P. syringae pv. apii was not detected on celery transplants until April or May of each year. Increased epiphytic populations preceded BLS outbreaks, and high-pressure, overhead irrigation favored bacterial infiltration and disease development. In seed-wash assays, P. syringae pv. apii was recovered from 5 of 24 commercial celery seed lots. In field tests, epiphytic P. syringae pv. apii was found on umbels of inoculated celery plants, and seeds from these plants were heavily contaminated with P. syringae pv. apii. Contaminated seed produced seedlings with large epiphytic P. syringae pv. apii populations. Hot-water treatment (50°C for 25 min) eliminated >99.9% of seed contamination. Based on these results, disease management techniques are proposed.

scholarly journals Hydrogeochemical characteristics and age dating of groundwater in the Quaternary and Nubian aquifer systems in Wadi Qena, Eastern Desert, Egypt

2015 ◽  
Vol 1 (3) ◽  
pp. 213-232 ◽  
Author(s):  
A. A. Abdel Moneim ◽  
E. M. Seleem ◽  
S. A. Zeid ◽  
S. G. Abdel Samie ◽  
Sameh Zaki ◽  
...  
Keyword(s):  
Eastern Desert ◽  
Age Dating ◽  
Aquifer Systems ◽  
Nubian Aquifer ◽  
Wadi Qena

Manganese-53: Development of the AMS technique for exposure-age dating applications

2007 ◽  
Vol 259 (1) ◽  
pp. 236-240 ◽  
Author(s):  
L.G. Gladkis ◽  
L.K. Fifield ◽  
C.R. Morton ◽  
T.T. Barrows ◽  
S.G. Tims
Keyword(s):  
Age Dating ◽  
Exposure Age
Sign in / Sign up

Export Citation Format

Share Document