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The effect of intermittent heat treatment on cellulose crystallites in wood was studied to evaluate quantitatively the changes of crystallinity induced by intermittent and continuous heating. The changes in crystallinity were found to be strongly affected by the intermittent heat treatment. The increased crystallinity, the width of the crystals, and the piezoelectric properties were the same for the first intermittent heating as for continuous heating. Further intermittent heating for the same time duration and temperature had no effect on the above properties, probably due to the stopping of the thermal reaction during the interval. Our results suggested that intermittent heat treatment has certain critical cooling temperatures that stop the thermal reaction and are closely related to the duration of the interval. Samples once exposed to a certain duration of heat treatment and then cooled need more time, about twice that of the first duration of intermittent heating compared with continuous heating, to reach maximum crystallinity in wood cellulose. 相似文献
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Malik Ashiq Rabbani Yoshie Murakami Yasuhisa Kuginuki Kenji Takayanagi 《Genetic Resources and Crop Evolution》1998,45(4):307-316
Genetic diversity of 30 radish (Raphanus sativus L.) accessions was investigated at the phenotypic level with morphological characters and at the DNA level using the random amplified polymorphic DNA (RAPD) technique. Thirty-six morpho-physiological traits were recorded from seedling stage to harvest. The 31 primers used generated 202 RAPD bands, of which 158 (78.2%) were polymorphic. Multivariate procedures were used to classify the germplasm on the basis of phenotypic traits and RAPD fragments. Dendrograms were generated for the Euclidean distance from the morphological data and the Nei's genetic distance from the RAPD markers. Phenotypically, all the accessions were classified into four major groups corresponding to the different forms of cultivated radish. The morphological diversity existing within each of these groups suggested that they should be discriminated into the three botanical convarieties, sativusT (large-rooted), caudatus (pod-type) and oleifer (oilseed-type). Clustering of the accessions did not show any pattern of association between the morphological characters and the collection sites. Instead, landrace groups were associated with their morphological similarities and horticultural uses. On the other hand, the intra-specific genetic relationships of several accessions based on RAPD analysis were related primarily to their collection sites rather than to their phenotypic affinities. The level of polymorphism exhibited by the various convarieties could be exploited in genetic mapping populations to tag economically important traits. These genotypes also could serve as a useful germplasm source for root, leaf, pod and seed. This preliminary study of traditional radish landraces from Pakistan provides useful information regarding their horticultural potential. 相似文献
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Mohammad R. Sabzalian Aghafakhr Mirlohi Ghodratollah Saeidi Mohammad T. Rabbani 《Genetic Resources and Crop Evolution》2009,56(8):1057-1064
Wild species of safflower, Carthamus oxyacanthus Bieb., is highly crossable with cultivated species, C. tinctorius L. and could be directly exploited in broadening safflower gene pool and improving the crop for biotic and abiotic stress
environments. In this study, genetic diversity among accessions of C. oxyacanthus and their relationships with cultivated safflower were evaluated using agro-morphological traits and polymorphic inter-simple
sequence repeats (ISSR) markers. Significant variation was observed among accessions particularly for seeds per capitulum,
seed yield per plant, harvest index and capitula per plant. Cluster analysis based on agro-morphological traits classified
the wild accessions in two groups according to their geographical regions, and separated them from the cultivated genotypes.
ISSR marker also revealed a high genetic variation among the accessions, and cluster analysis based on this marker divided
genotypes into four groups, with cultivated ones in a separate clade. Genetic variation observed among the wild safflower
germplasm at the DNA level was higher than the agro-morphological traits, indicating that ISSR is an effective marker system
for detecting diversity among safflower genotypes and their genetic relationships. Accessions of C. oxyacanthus with high genetic relationship to cultivated species could be used for interspecific hybridization in breeding programs of
safflower. 相似文献
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Rabbani H Ostadkarampour M Danesh Manesh AH Basiri A Jeddi-Tehrani M Forouzesh F 《Iranian Biomedical Journal》2010,14(3):77-82
Background: The ectopic expression of receptor tyrosine kinase Ror1 has been reported in patients with hematological malignancies such as chronic lymphocytic leukemia and acute lymphoblastic leukemia. Here we report, for the first time, expression of ROR1 gene in both tumor tissues and peripheral blood mononuclear cells (PBMC) from patients with renal cancer (RC). Methods: In the current study, the expression of ROR1 gene was semi-quantitatively measured in PBMC and tumor tissues from 16 RC patients as well as PBMC from 22 healthy individuals relative to the expression of the housekeeping gene phosphoglucomutase 1 by RT-PCR. Results: Our results showed that ROR1 was expressed at gene level in 81.3% of renal tumor tissues (13 out of 16) whereas it was expressed in 94% of PBMC from RC patients (15 out of 16). A weak expression of ROR1 was observed in PBMC of 4 out of 22 healthy individual. A significant expression of ROR1 was observed in PBMC from RC patients when compared to that in PBMC from normal healthy individuals (P<0.001). The expression of ROR1 in PBMC may reflect a shedding of tumor cells into blood stream. Conclusion: We conclude that detection of a high level of ROR1 expression in blood cells might assist in early detection of renal malignancies, providing taking into consideration the clinical symptoms of the disease. Key Words: ROR1, Ectopic expression, Renal cancer 相似文献
6.
Nasab M. Forogh Moradi M. Moradi Gh. Taghizadeh-Mehrjardi R. 《Eurasian Soil Science》2021,54(3):459-459
Eurasian Soil Science - An Erratum to this paper has been published: https://doi.org/10.1134/S1064229321300013 相似文献
7.
Study of crystalline behavior of heat-treated wood cellulose during treatments in water 总被引：1，自引：0，他引：1
The crystalline behavior of heat-treated wood cellulose treated at 85% relative humidity (RH), in water, or boiled in water after heat treatment was investigated. The normal increased crystallinity was significantly depressed for samples that were oven-dried and then treated in 85% RH or in water. In the case of boiling-water treatment, a more pronounced increased in crystallinity was initially observed, which then decreased gradually. The crystallinity decreased more than untreated wood for samples that were heat treated for long periods and was slightly higher than the decreased crystallinity from the beginning of the above two treatments. On the other hand, no significant change in crystallinity was observed for samples of increased crystallinity or decreased crystallinity that were treated under high-moisture conditions, for all three treatments. The results show that the crystalline state of wood cellulose heat treated under oven dry or high-moisture conditions behave differently if treated in water after heat treatment. Results suggested that the mechanism of crystallization might be different for samples that are subjected to heat treatment under oven-dry and high-moisture conditions. 相似文献
8.
Anxiolytic effects of Echium amoenum on the elevated plus-maze model of anxiety in mice 总被引：3，自引：0，他引：3
The ethanolic extract of Echium amoenum flowers at the dose of 50 mg/kg increased the percentage of time-spent and the percentage of arm entries in the open arms of the elevated plus-maze (EPM) and decreased the percentage of time-spent in the closed arms of EPM. Moreover, it prolonged the ketamine-induced latency to sleep but had no significant effects on total sleeping time induced by ketamine. Also, the locomotor activity was affected but not to the same extent as observed for diazepam. These results suggested that the extract of E. amoenum seems to possess anxiolytic effect with lower sedative activity than that of diazepam. 相似文献
9.
Malik Ashiq Rabbani Aki Iwabuchi Yoshie Murakami Tohru Suzuki Kenji Takayanagi 《Euphytica》1998,101(3):357-366
An investigation was conducted to determine the extent of diversity and relationships among the Brassica juncea germplasm
from Pakistan using morphological characters. A total of 52 accessions, including the collected germplasm as well as commercial
cultivars/improved lines, were studied under field conditions at Tsukuba, Japan during 1995 and 1996. All the accessions were
characterized for 35 agro-morphological characters from seedling emergence to crop maturity. Morphological data were analyzed
by numerical taxonomic techniques using two complementary procedures: cluster and principal component analyses. Phenograms
based on Euclidean distance placed the accessions into six groups during both years. Landrace groups were primarily associated
with morphological differences among the accessions and secondarily with the breeding objectives and horticultural uses. The
mustard germplasm collected from Pakistan showed a comparatively low level of phenotypic variation amongst themselves and
were genetically similar to the oilseed cultivars. However, the oilseed forms and vegetable cultivars were genetically distinct.
This study revealed that the evaluated germplasm appears to have a narrow genetic base which undergoes a high level of genetic
erosion. This is perhaps due to the use of the same ancestors in the selection of new lines for similar horticultural traits,
replacement by major crops and changes in agricultural land uses.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
10.
Genetic diversity in mustard (Brassica juncea L.) germplasm from Pakistan as determined by RAPDs 总被引：6，自引：0，他引：6
Malik Ashiq Rabbani Aki Iwabuchi Yoshie Murakami Tohru Suzuki Kenji Takayanagi 《Euphytica》1998,103(2):235-242
The genetic diversity and the relationships among a collection of mustard (B. juncea) germplasm, including 41 accessions collected
from Pakistan, 6 oilseed cultivars/ lines and 5 Japanese vegetable cultivars, were evaluated using random amplified polymorphic
DNA (RAPD) markers. A total of 198 polymorphic amplified products were obtained from 30 decamer primers. Of these, 14 were
unique to the accession PAK-85835 and 37 were specific to PAK-85839. Based on pair-wise comparisons of RAPD amplification
products, genetic similarity was estimated using similarity coefficients of Nei & Li (1979) and a dendrogram was constructed
using the unweighted pair-group method with arithmetic averages (UPGMA). Cluster analysis based on these genetic similarities
placed most of the collected germplasm and oilseed cultivars/lines close to each other, showing a low level of polymorphism
between the oilseed accessions collected in Pakistan. However, the clusters formed by the oilseed collections and cultivars
were distinct from those formed by the vegetable cultivars. A low level of genetic variability of oilseed mustard in Pakistan
was attributed to the selection for similar traits and horticultural uses. The farmers' preference for more remunerative crops
and perhaps the close parentage of these accessions further contributed towards their little diversity. The study demonstrated
that the RAPD is a simple and fast technique to compare the genetic relationships and the patterns of variation among accessions
of this crop.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献