نتایج جستجو برای: 260
تعداد نتایج: 11589 فیلتر نتایج به سال:
15 16 Correspondence to: 17 Paula Jakszyn, MPH, PhD 18 Unit of Nutrition, Environment and Cancer 19 Cancer Epidemiology Research Programme 20 Catalan Institute of Oncology 21 Av Gran via 199-203 (08907) 22 Email: [email protected] 23 Tel: +34 93 260 74 01 /Fax: +34 93 260 77 87 24 L ́Hospitalet de Llobregat, Barcelona, Spain 25 26 27 Word count: Abstract 193 words. Manuscript: 5579 words, 1...
The optical spectroscopy (absorption and luminescence) of a small concentration of lead (-10 ppm) incorporated into a NaC1:Sr crystal, containing a relatively higher concentration of Sr (-350 ppm), has been investigated. For samples annealed at room temperature after quenching, two overlapping absorption bands at 255 and 260 nm grow at the expenses of the A band typical of dissolved Pb +. For h...
The photochemistry of ortho-nitrobenzaldehyde dissolved in tetrahydrofuran was studied by means of femtosecond UV/Vis and IR spectroscopy. Comparison was made of the spectral and temporal signatures for ~400 nm and ~260 nm excitation. The 400 nm excitation promotes NBA to its lowest excited singlet state of nπ* character whereas for 260 nm an upper excited state of ππ* character is addressed. O...
اثر تنش سرما زدگی بر خصوصیات بیوشیمیایی و فیزیولوژیکی سه هیبرید ذرت (Zea mays L.) در مرحله گیاهچه ای
این آزمایش به منظور بررسی تأثیر تنش سرماو(عدم تنش و بر خصوصیات بیوشیمیایی و فیزیولوژیکی سه هیبرید ذرت (سینگل کراس های 704، 400، 260) در گلخانه تحقیقاتی دانشکده کشاورزی دانشگاه فردوسی مشهد اجرا شد. جهت اعمال تنش سرما گیاهچه های چهار برگی ذرت به مدت 12 ساعت در معرض دمای پنج درجه سانتیگراد قرار گرفتند. کلیه نمونه برداریها 24 ساعت پس از اعمال تنش سرما انجام شد. تنش سرما در دو رقم سینگل کراس 260 و...
Strict emission controls were implemented in Beijing and adjacent provinces to ensure good air quality during the 2015 China Victory Day parade. Here, we conducted synchronous measurements of submicron aerosols (PM1) at ground level and 260 m on a meteorological tower by using a high-resolution aerosol mass spectrometer and an aerosol chemical speciation monitor, respectively, in Beijing from 2...
We report molecular dynamics simulations of a hydrophobic polymer-chain in aqueous solution between 260 K and 420 K at pressures of 1 bar, 3000 bar, and 4500 bar. The simulations reveal a hydrophobically collapsed structure at low pressures and high temperatures. At 3000 bar and about 260 K and at 4500 bar and about 260 K, however, an abrupt transition to a swelled state is observed. The transi...
GPAT and AIRC encode enzymes for steps one and six plus seven respectively in the pathway for de novo purine nucleotide synthesis in vertebrates. The human GPAT and AIRC genes are divergently transcribed from a 558 bp intergenic promoter region. Cis-acting sites and transcription factors important for bidirectional expression were identified. A cluster of sites between nt 215 and 260 are essent...
BACKGROUND/AIMS We aim to evaluate the association between promoter polymorphism of the clusters of differentiation 14 (CD14) gene and Helicobacter pylori-induced gastric mucosal inflammation in a healthy Korean population. METHODS The study population consisted of 267 healthy subjects who visited our hospital for free nationwide gastric cancer screening. Promoter polymorphism at -260 C/T of ...
The information about the occurrence of embryonic and fetal losses in dairy herds in Poland is limited. Thus, the objective of this study was to assess the pregnancy loss between days 30 and 45 (late embryonic mortality) and between days 45 and 260 after artificial insemination (AI) (foetal loss). The study was carried out in 8 dairy herds in north-east Poland. In total 954 cows were examined f...
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