نتایج جستجو برای: loss of fresh water resources

تعداد نتایج: 21255248  

2001
Luis E. Marín E. C. Perry H. I. Essaid Birgit Steinich

A freshwater lens underlain by saltwater exists beneath the entire northern Yucatan karst plain, Mexico. Water levels recorded in this plain, during the period June 1987 April, 1989, were used to map the water table, identify inland hydrogeologic boundaries, and estimate the thickness of the freshwater lens using the Ghyben-Herzberg relation. The water table under most of northwestern Yucatan i...

2005
THORSTEN WAGENER YUQIONG LIU HOSHIN V. GUPTA EVERETT SPRINGER DAVID BROOKSHIRE Thorsten Wagener

Approximately one-third of the Earth’s land surface is considered to be arid or semiarid. The availability of water in such regions is particularly sensitive to climate variability while the demand for water is experiencing an explosive increase as populations continue to grow. The competition for available freshwater is exerting considerable pressure on the management of available water resour...

Journal: :علوم باغبانی 0
هانیه خطیب سید حسین میردهقان نادر درکی

abstract in this study, fresh pistachio of 'ohadi' and 'akbari' cultivars expose to the uv-c radiation with a wavelength of 0, 3, 6 and 12 kj/m2, then located at temperature of 1 ± 3 degrees celsius for 45 days. properties or attributes, including weight loss, stiffness and sensory evaluation of fresh pistachio after 20 and 45 days storage were measured. results showed that pistachio nut weight...

Journal: :The Journal of experimental biology 1969
R Motais J Isaia J C Rankin J Maetz

Fresh-water teleosts, whose blood is hypertonic to the external medium (about 330 m-osmoles/kg. vs. a few m-osmoles/kg.), face the problem of osmotic entry of water and loss of electrolytes, while sea-water teleosts live in an environment (1150 m-osmoles/kg.) which induces osmotic loss of water and a diffusional influx of electrolytes. Many data are available on the electrolyte balance of fish ...

Journal: :International journal of clinical and experimental medicine 2015
Serap Karaman Kamuran Karaman Baran Serdar Kızılyıldız Nesrin Ceylan Sultan Kaba Mehmet Parlak Burhan Beger Abdullah Ceylan

BACKGROUND Hepatitis A is a common infectious disease during childhood worldwide. Recently, great deal of changes in the epidemiology has been reported. The seroepidemiologic studies of this infection are not sufficient in Eastern region of Turkey. OBJECTIVE To investigate the seroprevalence and association with socio-demographic variables of hepatitis A in 1-15 year old children in Van. PA...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم 1393

in this thesis, structural, electronical, and optical properties of inverse pervskite(ca3pbo) in cubic phase have been investigated.the calculation have been done based on density functional theory and according to generalized gradiant approximate (gga) as correlating potential. in order to calculate the configurations, implementing in the wien2k code have been used from 2013 version. first of ...

Journal: :journal of ornamental plants 2015
majid amani beni abdolla hatamzadeh ali nikbakht mahmud ghasemnezhad mohammad zarchini

tuberose (polianthes tuberosa l.) is an important commercial cut flower that has a short vase life. an experiment was carried out by using five different levels of humic acid (ha) (0, 25, 50, 75, and 100 mg l-1) and seven different levels of silver nano-particles (snp) (0, 0.5, 1, 2, 3, 4 and 5 mg l-1) mixed with 1.5% sucrose on cut tuberosa cv. single flower. the loss of fresh weight on third ...

Journal: :Bulletin of environmental contamination and toxicology 1994
S M Nelson G Mueller D C Hemphill

Follow this and additional works at: https://digitalscholarship.unlv.edu/water_pubs Part of the Aquaculture and Fisheries Commons, Biology Commons, Environmental Engineering Commons, Environmental Health and Protection Commons, Environmental Indicators and Impact Assessment Commons, Environmental Monitoring Commons, Fresh Water Studies Commons, Natural Resources Management and Policy Commons, T...

2015
Richard W. Tew Samuel S. Egdorf James E. Deacon RICHARD W. TEW

Follow this and additional works at: http://digitalscholarship.unlv.edu/water_pubs Part of the Biochemistry Commons, Biology Commons, Desert Ecology Commons, Environmental Health and Protection Commons, Environmental Indicators and Impact Assessment Commons, Environmental Monitoring Commons, Fresh Water Studies Commons, Natural Resource Economics Commons, Natural Resources Management and Policy...

2017
Sarah H Luke Holly Barclay Kawi Bidin Vun Khen Chey Robert M Ewers William A Foster Anand Nainar Marion Pfeifer Glen Reynolds Edgar C Turner Rory P D Walsh David C Aldridge

Freshwaters provide valuable habitat and important ecosystem services but are threatened worldwide by habitat loss and degradation. In Southeast Asia, rainforest streams are particularly threatened by logging and conversion to oil palm, but we lack information on the impacts of this on freshwater environmental conditions, and the relative importance of catchment versus riparian-scale disturbanc...

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