O Pear

03/20/2024

Ο Γεώργιος Π. Χρούσος είναι καθηγητής και πρόεδρος του Τμήματος Παιδιατρικής της Ιατρικής Σχολής του Πανεπιστημίου Αθηνών. Ήταν ανώτερος ερευνητής, επικεφαλής του Τμήματος Παιδιατρικής Ενδοκρινολογίας και του Προγράμματος Κατάρτισης, καθώς και επικεφαλής του Κλάδου Παιδιατρικής και Αναπαραγωγικής Ενδοκρινολογίας του Εθνικού Ινστιτούτου Παιδικής Υγείας και Ανθρώπινης Εξέλιξης των ΗΠΑ (NICHD), του Εθνικού Ινστιτούτου Υγείας (NIH). Είναι επίσης καθηγητής κλινικής στην παιδιατρική, τη φυσιολογία και τη βιοφυσική στην Ιατρική Σχολή του Πανεπιστημίου Τζώρτζταουν, και διακεκριμένος επισκέπτης ερευνητής στο Ινστιτούτο Παιδικής Υγείας και Ανθρώπινης Εξέλιξης των ΗΠΑ. Ο Δρ. Χρούσος ήταν ο πρώτος γενικός διεθυντής του Ιδρύματος Ιατροβιολογικών Ερευνών της Ακαδημίας Αθηνών (2001–2002).[1] Κατέχει τη θέση του επικεφαλής στο τμήμα Εφηβικής Υγείας της UNESCO, ενώ διατηρούσε τη θέση του επικεφαλής Τεχνολογίας και Κοινωνίας, στη Βιβλιοθήκη του Κογκρέσου, στην Ουάσινγκτον.[2][3]

Ο Γεώργιος Χρούσος είναι μεταξύ των 250 πλέον χαρακτηριστικών κλινικών ερευνητών του κόσμου. Συνέγραψε περισσότερες από 1.100 επιστημονικές εκδόσεις, επιμελήθηκε 29 βιβλία, ενώ τα έργα του έχουν χρησιμοποιηθεί περισσότερες από 74.000 φορές. Σύμφωνα με την ιστοσελίδα ISI (που μετρά τις αναζητήσεις για επιστημονικές εκδόσεις) είναι ο πλέον ανακτημένος κλινικός παιδίατρος και ενδοκρινολόγος στον κόσμο.[4] Σύμφωνα με το μετρητή αναφορών της υπηρεσίας Google Μελετητής, είναι ο 37ος πλέον αναγνωρισμένος επιστήμονας στον κόσμο.

03/20/2024

03/19/2024

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genus of fruit and ornamental trees and shrubs of the rose family

03/04/2024

03/01/2024

Origin: Hebei Zhao county, China (high quality origin)

Introduction: The Xuehua pear in Zhaozhou is a special product of Zhao County, because its flesh is white like jade, like frost, like snow, the so-called history contains: Zhaozhou Yuli "Big as Box, Sweet as Honey, Crisp as Ling" said

Features: the fruits are large, round, with a thin skin, thick flesh, good color, juicy, sweet to the taste and Zhaozhou bridge, as is known. The weight of one fruit is about 400 g, up to 1900 g, sugar content 12-14%, up to 16.5%, rich in nutrients, contains many organic acids, proteins, minerals and vitamins.

Maturity period: Sold every August

Countries: Indonesia, Singapore, Malaysia, Thailand and other countries of Southeast Asia, Russia.

Delivery time: YEAR ROUND

Packaging: box, pulp tray, white screen paper and tissue paper for each pear.

Model: 17 kg/19 kg.

03/01/2024

Pyrus calleryana, or Callery pear, is a tree species from the pear genus of the rose family. Comes from China and Vietnam. Widespread in the USA. Lives up to 25 years. Belongs to the subgenus Pashia. It was obtained by breeding at the U. S. Plant Introduction Station (Maryland, USA) by Glenn Dale. It was brought to Europe in 1908.

The trees were introduced to the United States by the United States Department of Agriculture in Glendale, MD, as an ornamental landscape tree in the mid-1960s. They became popular among landscapers because they were inexpensive, transported well, and grew quickly. Lady Bird Johnson promoted the tree in 1966, planting it in downtown Washington, DC.

In much of North America, Caleri cultivars, especially 'Bradford', have been widely planted as ornamental trees. The species is tolerant to different soil types, drainage levels and soil acidity. Their crown shape varies from ovoid to elliptical, but can become asymmetric from limb loss due to excessive and unstable growth rates. The initial symmetry of several cultivars leads to their attempted use in areas such as industrial parks, streets, shopping malls and office parks. At the latitude of Pittsburgh, Pennsylvania, the trees often stay green until mid-November, and the colors are often vivid in a warm fall, although they can freeze to paint in a cold year.

02/28/2024

In the wild in Europe, the pear is distributed to approximately 60° north latitude. At the northern border of the range - rare.

By 2006, as a result of the successful selection of frost-resistant varieties, pears were effectively grown in garden plots located in the Urals and Western Siberia up to 55° N. w.

In the Far East of Russia, northeast China and Korea, a very cold-resistant type of pear grows - the Ussuri pear[9].

It is believed that the origin of cultivated varieties of pears is associated with the hybridization of a number of species, in particular Pyrus achras Gärtn., Pyrus persica Pers., Pyrus cordata Desv., Pyrus elaeagnifolia Pall.. Pears were cultivated in ancient Persia, Greece and the Roman Empire.

Currently, there are thousands of varieties of pears.

02/26/2024

Pear buds, like other trees of the family, are of two types: vegetative and generative. Vegetative buds are smaller and sharper, generative buds are larger and duller. External differences between the two types of buds increase from the time of formation of these buds to the emergence of shoots from them.

Time and form of flowering: April-May, flowers are white, 3 cm in diameter, 5-petaled, 3-9 in umbellate racemes. There are from 2 to 5 pistils in the gynoecium. Their ovaries grow together and with the receptacle, which takes the shape of a mug; The petals in the bud are arranged tiled.

Fruit type: apple; its nests are lined with a dense membrane (intracarp).

The fruit, as a rule, is elongated with a widening at the bottom; there are varieties with spherical fruits. Pear fruits have a characteristic granular flesh due to the presence of stony cells (sclereids)

02/24/2024

02/24/2024

02/24/2024

Trees of various sizes, sometimes large shrubs, sometimes equipped with thorns. With a taproot, weakly branching, penetrating deeply into the soil[6].

The shape of the crown of a free-growing tree is pyramidal or round, prone to thickening. The annual growth is 30-40 cm. Under favorable conditions, the pear reaches large sizes - up to 5-25 meters in height and 5 meters in crown diameter.

Leaves usually fall off. The leaf arrangement is spiral in 5 rows. The leaf is broadly ovate, 2.5–10 cm long, short-pointed; color - dark green, shiny, the underside of the leaf is bluish-green, golden-orange in autumn.

02/22/2024

The word “pear” has been found in Russian written sources since the 12th century in the form hrush—starting with the Studite Charter of 1193 (according to Sreznevsky); in the form of a pear has been found since the 14th century - starting with the translation of Chronicles. In the 17th century, the word “dula” appeared as a synonym for the word “pear”, borrowed, according to N. M. Shansky’s dictionary, from the Polish language; according to Ozhegov’s dictionary, this word is regional and is applied to several varieties of small pears.