Praying Through Growth Barriers

Cadmium telluride (CdTe) solar cells are deposited in current production using evaporation-based tech- niques. Fabricating CdTe solar cells using magnetron sputtering would have the advantage of being more cost-efficient. Here, we show that such deposition results in the incorporation of the magnetron working gas Ar, within the films. Post deposition processing with CdCl 2 improves cell efficiency and during which stacking faults are removed. The Ar then accumulates into clusters leading to the creation of voids and blisters on the surface. Using molecular dynamics, the penetration threshold energies are determined for both Ar and Xe, with CdTe in both zinc-blende and wurtzite phases. These calculations show that more Ar than Xe can penetrate into the growing film with most penetration across the (111) surface. The mechanisms and energy barriers for interstitial Ar and Xe diffusion in zinc-blende are determined. Barriers are reduced near existing clusters, increasing the probability of capture-based cluster growth. Barriers in wurtzite are higher with non-Arrhenius behaviour observed. This provides an explanation for the increase in the size of voids observed after stacking fault removal. Blister exfoliation was also modelled, showing the formation of shallow craters with a raised rim.

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Growth Barriers and Business Training For New Entrants on E-commerce Platform

AEA Randomized Controlled Trials ◽

10.1257/rct.6725-1.0 ◽

2020 ◽

Author(s):

Zhengyun Sun

Keyword(s):

Business Training ◽

New Entrants ◽

Growth Barriers

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Different Spectra of Stationary-Phase Mutations in Early-Arising versus Late-Arising Mutants of Pseudomonas putida: Involvement of the DNA Repair Enzyme MutY and the Stationary-Phase Sigma Factor RpoS

Journal of Bacteriology ◽

10.1128/jb.184.24.6957-6965.2002 ◽

2002 ◽

Vol 184 (24) ◽

pp. 6957-6965 ◽

Cited By ~ 37

Author(s):

Signe Saumaa ◽

Andres Tover ◽

Lagle Kasak ◽

Maia Kivisaar

Keyword(s):

Stationary Phase ◽

Pseudomonas Putida ◽

Transcriptional Activation ◽

Sigma Factor ◽

Phenol Degradation ◽

Test System ◽

Growth Barriers ◽

Mutational Processes ◽

Sigma Factor Rpos ◽

Selection Of

ABSTRACT Stationary-phase mutations occur in populations of stressed, nongrowing, and slowly growing cells and allow mutant bacteria to overcome growth barriers. Mutational processes in starving cells are different from those occurring in growing bacteria. Here, we present evidence that changes in mutational processes also take place during starvation of bacteria. Our test system for selection of mutants based on creation of functional promoters for the transcriptional activation of the phenol degradation genes pheBA in starving Pseudomonas putida enables us to study base substitutions (C-to-A or G-to-T transversions), deletions, and insertions. We observed changes in the spectrum of promoter-creating mutations during prolonged starvation of Pseudomonas putida on phenol minimal plates. One particular C-to-A transversion was the prevailing mutation in starving cells. However, with increasing time of starvation, the importance of this mutation decreased but the percentage of other types of mutations, such as 2- to 3-bp deletions, increased. The rate of transversions was markedly elevated in the P. putida MutY-defective strain. The occurrence of 2- to 3-bp deletions required the stationary-phase sigma factor RpoS, which indicates that some mutagenic pathway is positively controlled by RpoS in P. putida.

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Growth barriers of women-owned home-based businesses in Iran: an exploratory study

Gender in Management An International Journal ◽

10.1108/gm-03-2016-0069 ◽

2017 ◽

Vol 32 (4) ◽

pp. 244-267 ◽

Cited By ~ 8

Author(s):

Meisam Modarresi ◽

Zahra Arasti ◽

Kambiz Talebi ◽

Maghsoud Farasatkhah

Keyword(s):

Business Owners ◽

Business Growth ◽

Female Entrepreneurs ◽

Financial Barriers ◽

Policy Makers ◽

Content Type ◽

Women Business Owners ◽

Home Based ◽

Growth Barriers ◽

Depth Interviews

Purpose The purpose of this paper is to identify the growth barriers of women’s home-based businesses (HBBs) in Iran. Design/methodology/approach The qualitative approach was used by 22 in-depth interviews with Iranian female HBBs owners/mangers. Findings Business growth barriers of women were categorized in a multi-level framework of individual barriers (micro), business-related barriers (medium) and environmental barriers (macro). The most important micro-level barrier is lack of skills and experience, while the financial barriers identified as the most business-related one and, finally, the problems of having work interactions with men is the most important environmental barrier women-owned HBBs mentioned. Research limitations/implications The results of this paper can help policy-makers better understand growth barriers for women-owned HBB and attenuate these barriers by developing purposeful supportive growth policies that are commensurate with the barriers. Also, HBB women owners themselves could better concentrate on removing barriers by deepening their understanding of their business growth barriers. Originality/value The paper contributes to the scarce knowledge about women-owned HBBs in Iran, a rapidly growing, developing country, which can provide better insights from a less explored context. Moreover, as there is only a limited understanding of HBB growth, especially in relation to women business owners, the paper results can prove helpful for researchers in the domain of female entrepreneurs.

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Kontaminasi Telur Dan Larva Cacing Usus Pada Tanah Di Desa Juku Eja Kabupaten Tanah Bumbu

JURNAL KESEHATAN LINGKUNGAN INDONESIA ◽

10.14710/jkli.19.2.127-132 ◽

2020 ◽

Vol 19 (2) ◽

pp. 127-132

Author(s):

Juhairiyah Juhairiyah ◽

Liestiana Indriyati ◽

Budi Hairani ◽

Deni Fakhrizal

Keyword(s):

Residential Area ◽

Trichuris Trichiura ◽

Nutritional Deficiencies ◽

Soil Conditions ◽

Intestinal Helminth ◽

Neglected Diseases ◽

Cross Sectional ◽

Intestinal Nematode ◽

Human Contact ◽

Growth Barriers

Latar belakang: Soil Transmitted Helminth merupakan penyakit infeksi oleh nematode usus masih menjadi neglected diseases yang dapat menyebabkan kekurangan gizi, anemia, hambatan pertumbuhan dan perkembangan kognitif khususnya pada anak-anak. Penularan STH terjadi melalui kontak dengan telur parasit atau larva yang berkembang di tanah yang hangat dan lembab sehingga penelitian ini bertujuan untuk mengetahui keberadaan telur dan larva cacing usus yang ada di dalam tanah di Desa Juku Eja yang merupakan penyebab dari tingginya prevalensi kecacingan di SDN Juku Eja.Metode: Penelitian menggunakan desain cross sectional. Pengambilan sampel tanah dilakukan di 5 titik di SDN Juku Eja dan 17 titik di sekitar area pemukiman warga Desa Juku Eja. Pemeriksaan sampel tanah menggunakan metode pengapungan dan preparat kemudian diperiksa di bawah mikroskop. Hasil: Ditemukan 2 sampel positif larva cacing tambang (hookworm) di SDN Juku Eja dan satu titik positif telur cacing Trichuris trichiura di area pemukiman. Kondisi tanah pada kedua lokasi yaitu berpasir dipinggir pantai. Kontaminasi tanah oleh telur dan larva cacing STH disebabkan oleh kebiasaan BAB di tepi pantai oleh masyarakat, ketidaktersediaan jamban keluarga dan kebiasaan tidak menggunakan alas kaki di tanah.Simpulan: Kontaminasi tanah oleh telur dan larva cacing dapat menjadi sumber risiko penularan infeksi STH jika terjadi kontak manusia dengan tanah tanpa perlindungan diri dan kebiasaan hidup bersih dan sehat. ABSTRACT Title: Contamination Of Worm Egg And Larvae In Soil At Juku Eja Village Tanah Bumbu RegencyBackground: Soil Transmitted Helminth (STH) is an infectious disease by intestinal nematode. This neglected disease can cause nutritional deficiencies, anemia, growth barriers and cognitive development, especially in children. STH transmission occurs through contact with parasitic eggs or larvae that develop in warm and moist soils, so this study aims was determine the presence of intestinal helminth eggs and larvae in the soil of Juku Eja Village, which is the cause of the high prevalence of helminthiasis in SDN Juku Eja.Method: Research using cross sectional design. Soil sampling was carried out at 5 points at SDN Juku Eja and 17 points around the residential area of Juku Eja Village. Soil samples examination was using the flotation method and then the preparations are examined under a microscope.Result: Result was found 2 positive samples of hookworm larvae (hookworm) at SDN Juku Eja and 1 spot positive of Trichuris trichiura egg in the residential area. Soil conditions at both locations are sandy beach. Soil contamination by eggs and STH worm larvae is caused by the habit of defecating on the beach by the community, the unavailability of family latrines and the habit of not using footwear on the ground Conclusion: Contamination of soil by eggs and worm larvae can be a source of risk of transmission of STH infections if there is human contact with the soil without self-protection and clean and healthy living habits.

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