Results 21 to 30 of about 2,082,962 (313)

Floristic, frequency, and vegetation life-form spectra of a cerrado site

open access: yesBrazilian Journal of Biology
We used Raunkiaer's system to classify in life-forms the vascular plants present in 12 random 25 m² quadrats of a cerrado site. The study area is covered by cerrado sensu stricto and is located in the Valério fragment, at about 22º13'S and 47º51'W, 760 m
M. A. Batalha, F. R. Martins
doaj   +1 more source

Growth stages and site components influence on form factors of beech (Fagus orientalis Lipsky) [PDF]

open access: yesمجله جنگل ایران, 2013
Since tree stems are not cylindrical completely, an index called form factor is needed for estimating the real tree volume. The form factor is third effective component in determining the tree volume after diameter and high. The goal of the present study
A.E. Bonyad, J. Torkaman, A. Rohi
doaj  

Evaluation of Excavation-Damaged Zone around Underground Tunnels by Theoretical Calculation and Field Test Methods

open access: yesEnergies, 2019
Excavation-damaged zones (EDZs) induced in underground mining and civil engineering potentially threaten tunnel safety and stability, and increase construction and support costs. In this paper, an investigation of the excavation damaged zone (EDZ) around
Ming Tao   +5 more
doaj   +1 more source

Dampak Pembangunan Modern Terhadap Keberadaan Situs Buni

open access: yesHumanis, 2020
Buni site is one of the prehistoric relics in Bekasi Regency which has an important role for the development of history in the northern part of Java Island.There are several potential archeological remains at the Buni Site in the form of metal artifacts,
Husein Abudrrahim   +2 more
doaj   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Impact of environmental factors on distribution of wild pear (Pyrus glabra Boiss.) in Sepidan region, Fars province [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2010
In this research, several ecological characteristics of Pyrus glabra Boiss. were studied. Distribution area of wild pear was drawn on a topographic map, and altitudinal range of horizontal and vertical distribution was determined.
Mojtaba Hamzehpour   +5 more
doaj  

Excision and Circularization of Integrative Conjugative Element Tn5253 of Streptococcus pneumoniae

open access: yesFrontiers in Microbiology, 2018
The integrative conjugative element (ICE) Tn5253 of Streptococcus pneumoniae, conferring resistance to tetracycline and chloramphenicol, was found integrated at a 83-bp specific target site (attB) located in the rbgA gene of the pneumococcal chromosome ...
Francesco Santoro   +3 more
doaj   +1 more source

Nest site selection and nutritional provision through excreta: a form of parental care in a tropical endogeic earthworm [PDF]

open access: yesPeerJ, 2016
Nest construction is a common form of parental care in soil organisms. However, it is unknown whether the tropical earthworm Pontoscolex corethrurus produces nests in soils with low nutritional quality habitats. Here we studied the reproductive behaviour
Angel I. Ortiz-Ceballos   +2 more
doaj   +2 more sources

RAD50 missense variants differentially affect the DNA damage response and mitotic progression

open access: yesFEBS Letters, EarlyView.
RAD50 incorporates into the MRN complex and initiates the DNA damage response. Furthermore, RAD50 promotes mitotic progression. RAD50 missense variants capable of forming an MRN complex supported the DNA damage response and mitotic features to different extents in complementation experiments, indicating these functions are separable and might impact ...
Hanna Redeker   +9 more
wiley   +1 more source

Silvicultural characteristics and site demands of Gall Oak (Quercus infectoria Oliv.) in Shineh, Lorestan province Iran [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2006
Gall oak (Quercus infectoria Oliv.) is one of rare species that is only presence in the northwestern part of Zagros mountains. This research aims at studying site demands and some quantitative and qualitative characteristics of Qurecus  infectoria.
Daryoosh Mehdifar, Khosro Sagheb-Talebi
doaj  

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