58,209 research outputs found
Nucleic acid sequence and oncogenic properties of the HZ2 feline sarcoma virus v-abl insert.
No full textHardy-Zuckerman 2 feline sarcoma virus (HZ2-FeSV), isolated from a multicentric feline fibrosarcoma is a replication-defective acute transforming feline retrovirus which originated by transduction of feline c-abl sequences with feline leukemia virus (FeLV) and is known to encode a 110-kilodalton gag-abl fusion protein with tyrosine-specific protein kinase activity (P. Besmer, W. D. Hardy, E. E. Zuckerman, P. J. Bergold, L. Lederman, and H. W. Snyder, Nature (London) 303:825-828, 1983). The nucleotide sequence of the abl segment in the HZ2-FeSV genome was determined and compared with the murine and human v-abl and c-abl sequences. The predicted transforming protein consists of 344 amino acids (aa) of FeLV gag origin, 439 aa of abl origin, and at least 200 aa of FeLV pol origin (p110gag-abl-pol). The 1,317-base-pair HZ2-FeSV v-abl segment (fv-abl) corresponds to 5' abl sequences which include the region known to specify the protein kinase domain. The 5' 189 base pairs of fv-abl correspond to 5' c-abl sequences not contained in Abelson murine leukemia virus (MuLV) v-abl. The mouse c-abl exon which contains these segments was identified, and its nucleotide sequence was determined. Comparison of the predicted amino acid sequence of fv-abl with those of Abelson MuLV v-abl and c-abl revealed five aa differences. The 5' junction between FeLV and abl was found to involve a preferred region in FeLV gag p30 (P. Besmer, J. E. Murphy, P. C. George, F. H. Qiu, P. J. Bergold, L. Lederman, H. W. Snyder, D. Brodeur, E. E. Zuckerman, and W. D. Hardy, Nature (London) 320:415-421, 1986). A six-base homology exists at the recombination site between the parental FeLV and the c-abl sequences. The 3' junction between fv-abl and FeLV pol predicts an in-frame fusion of fv-abl and FeLV pol. A transformed cell line containing a truncated gag-abl-pol protein, p85, that lacks most of the FeLV pol sequences was obtained by transfection of NIH 3T3 mouse cells. This result implies that the pol sequences of the p110gag-abl-pol protein are dispensable for fibroblast transformation. To assess whether the fv-abl segment specifies the unique biological properties of HZ2-FeSV, we constructed a Moloney MuLV-based version of HZ2-FeSV, Mo-MuLV(fv-abl), in which the fv-abl sequences were contained in a genetic context similar to that in HZ2-FeSV.(ABSTRACT TRUNCATED AT 400 WORDS
Neosychnocotyle maggiae Snyder & Tkach 2007
No full textNeosychnocotyle maggiae Snyder & Tkach, 2007 Carettochelys insculpta (Reptilia); freshwater; intestine; AUS; Australia (Oceania) (Snyder & Tkach 2007). Remark: Type host; sequence of partial 18 S, ITS- 1, 5.8S, ITS- 2 and partial 28 S in the GenBank database EF015578. Emydura victoriae (Reptilia); freshwater; intestine; AUS; Australia (Oceania) (Snyder & Tkach 2007).Published as part of Alves, Philippe V., Vieira, Fabiano M., Santos, Cláudia P., Scholz, Tomáš & Luque, José L., 2015, A Checklist of the Aspidogastrea (Platyhelminthes: Trematoda) of the World, pp. 339-396 in Zootaxa 3918 (3) on page 355, DOI: 10.11646/zootaxa.3918.3.2, http://zenodo.org/record/24120
The Marlborough-Godolphin Correspondence, éd. par Henry L. Snyder, 1974
No full textBaridon Michel. The Marlborough-Godolphin Correspondence, éd. par Henry L. Snyder, 1974. In: Dix-huitième Siècle, n°9, 1977. Le sain et le malsain. p. 405
The Marlborough-Godolphin Correspondence, éd. par Henry L. Snyder, 1974
No full textBaridon Michel. The Marlborough-Godolphin Correspondence, éd. par Henry L. Snyder, 1974. In: Dix-huitième Siècle, n°9, 1977. Le sain et le malsain. p. 405
Assessment of Myrtus communis L. water status and water requirements
No full textMyrtle (Myrtus communis L.) is a naturally occurring, highly drought-tolerant, evergreen shrub or small tree that is widely distributed within the Mediterranean basin. It is classified as an aromatic species because of the essential oil compounds of the leaves and fruits. Myrtle is commercially used for liquor production and perfume, and the harvest comes mainly from wild plants. Currently, there is insufficient wild-plant production to meet the demand for myrtle leaves and berries which has led to increasing interest to cultivate the plants to increase production. To assess the water requirements and water use efficiency, research was conducted on the ecophysiological responses of commercially grown myrtle plants to different soil-moisture conditions using stem water potential measurements. Data were collected in an eight-year-old myrtle orchard located near Alghero (Italy) during two consecutive summers. Plants showed higher values of net photosynthesis and water use efficiency under moderate stress than in well watered conditions. Severe stress symptoms appeared only with low soil moisture content. These results showed that optimal myrtle production will likely occur using regulated deficit irrigation. Crop evapotranspiration was determined using the surface renewal method, and the crop coefficient (Kc), relative to short-canopy standardized reference evapotranspiration (ET0) ranged between 0.7 and 1.2
The L-p-to-L-q boundedness of commutators with applications to the Jacobian operator
No full textSupplying the missing necessary conditions, we complete the characterisation of the L-p -> L-q boundedness of commutators [b, T] of pointwise multiplication and Calderon-Zygmund operators, for arbitrary pairs of 1 q, our results are new even for special classical operators with smooth kernels. As an application, we show that every f is an element of L-p(R-d) can be represented as a convergent series of normalised Jacobians J(u) = det del uof u is an element of (over dot(W))(1,dp)(R-d)(d). This extends, from p = 1 to p > 1, a result of Coifman, Lions, Meyer and Semmes about J:. (over dot(W))(1,d)(R-d)(d) -> H-1(R-d), and supports a conjecture of Iwaniec about the solvability of the equation Ju = f is an element of L-p(R-d). (C) 2021 The Author(s). Published by Elsevier Masson SAS.Peer reviewe
CROP COEFFICIENTS TO ADAPT FOR CLIMATE CHANGE IMPACT ON EVAPOTRANSPIRATION
No full textCrop water requirements are important factors for food production, expecially in areas where the climate is arid or semiarid. These areas are experiencing increasing population growth, which amplifies the need for more efficient irrigation. Better water use efficiency is needed to produce more food while conserving water as a limited natural resource. Crop coefficients are critically important for estimating crop evapotranspiration, but in literature there are a plethora of articles reporting different values for the same crop, mainly because of different weather and crop management conditions. A new and more precise method of calculation of crop water requirement is presented, which will help improve irrigation scheduling to face future climate change and its effect on world food production
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