Stereo Dissecting Microscope

all about Stereo Dissecting Microscope

Stereo Dissecting Microscope Resources

Home > Stereo Dissecting Microscope > Agriculture and Horticulture

Agriculture and Horticulture

TropHort provides historic and current articles in biology and in the applied life sciences agriculture and horticulture. While focussing on the horticulture of fruits and vegetables, it deals with related environmental topics including biodiversity and global warming.

Click Here to read the entire article...

Other Articles:

•	Expression profiles for six zebrafish genes during gonadal sex differentiation
	Background: The mechanism of sex determination in zebrafish is largely unknown and neither sex chromosomes nor a sex-determining gene have been identified. This indicates that sex determination in zebrafish is mediated by genetic signals from autosomal genes. The aim of this study was to determine the precise timing of expression of six genes previously suggested to be associated with sex differentiation in zebrafish. The current study investigates the expression of all six genes in the same individual fish with extensive sampling dates during sex determination and -differentiation. Results: In the present study, we have used quantitative real-time PCR to investigate the expression of ar, sox9a, dmrt1, fig alpha, cyp19a1a and cyp19a1b during the expected sex determination and gonadal sex differentiation period. The expression of the genes expected to be high in males (ar, sox9a and dmrt1a) and high in females (fig alpha and cyp19a1a) was segregated in two groups with more than 10 times difference in expression levels. All of the investigated genes showed peaks in expression levels during the time of sex determination and gonadal sex differentiation. Expression of all genes was investigated on cDNA from the same fish allowing comparison of the high and low expressers of genes that are expected to be highest expressed in either males or females. There were 78% high or low expressers of all three "male" genes (ar, sox9a and dmrt1) in the investigated period and 81% were high or low expressers of both "female" genes (fig alpha and cyp19a1a). When comparing all five genes with expected sex related expression 56% show expression expected for either male or female. Furthermore, the expression of all genes was investigated in different tissue of adult male and female zebrafish. Conclusion: In zebrafish, the first significant peak in gene expression during the investigated period (2-40 dph) was dmrt1 at 10 dph which indicates involvement of this gene in the early gonadal sex differentiation of males.
	Click Here to read the entire article...

•	Crop Engineered To Grow In Poisonous Soil
	Aluminum toxicity in acidic soils limits crop production in as much as half the world's arable land. Now, researchers have cloned a novel aluminum-tolerant gene in sorghum and expect to have genetically engineered aluminum-tolerant sorghum lines by next year. Sorghum is an important food crop in Africa, Central America and South Asia and is the world's fifth most important cereal crop.
	Click Here to read the entire article...

•	Analysis of VanA vancomycin-resistant Enterococcus faecium isolates from Saudi Arabian hospitals reveals the presence of clonal cluster 17 and two new Tn1546 lineage types
	Objectives The aim of this study was to characterize 34 vancomycin-resistant VanA Enterococcus faecium isolates obtained from two hospitals in Saudi Arabia and to assess Tn1546 variation within these isolates. Methods PFGE and multilocus sequence typing (MLST) genotypes, antibiotic susceptibility patterns, the presence of enterococcal surface protein (esp) and hyaluronidase (hyl) genes and conjugation frequencies were determined. In addition, Tn1546 elements were characterized. Results PFGE and MLST analysis revealed the presence of 31 and 6 different genotypes, respectively. Further, three new ST types were discovered. Ninety-seven percent (33/34) of the isolates were associated with clonal complex 17 (CC17), with all isolates but one being resistant to ampicillin and all isolates being susceptible to linezolid. The esp and hyl genes were found in 44% (15/34) and 53% (18/34) of the isolates, respectively. Tn1546 analysis revealed that the isolates belonged to five different groups, including two new lineages. The IS-element insertions described did not abolish the transfer of VanA resistance. Conclusions VanA vancomycin-resistant E. faecium isolates obtained from Saudi Arabian hospitals include CC17 MLST types, a clonal cluster associated with E. faecium nosocomial infection worldwide. Novel E. faecium MLST types are circulating in Saudi Arabia, as well as novel Tn1546 types. It seems likely that CC17 E. faecium isolates may be distributed throughout the Middle East as well as Europe, America, Africa and Australia.
	Click Here to read the entire article...

•

	Click Here to read the entire article...

•	Anesiva Commences Phase 2 Trial of Adlea(TM) in Arthroscopic Shoulder Surgery

	Click Here to read the entire article...

•	MikeLite Stereo Microscope Lights
	MikeLite manufactures high-intensity LED lights that are a replacement for fiberoptics. LEDs last 50,000 hours compared to 200 hours for a halogen light. Light produced is cold and ...
	Click Here to read the entire article...